CN101908827B - Method and system for controlling regulation of power supply voltage - Google Patents
Method and system for controlling regulation of power supply voltage Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
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Abstract
The invention discloses a method and a system for controlling regulation of a power supply voltage. The method comprises the following steps of: firstly, defining an input state set and an output state set, defining PWM (Pulse Width Modulation) fuzzy control rules, and obtaining a control result of the corresponding output state by the PWM (Pulse Width Modulation) fuzzy control rules according to the corresponding relationship among different combinations of the input state and different output states; and secondly, controlling and regulating the power supply voltage according to the PWM fuzzy control rules. Compared with the prior art, the invention carries out fuzzification to obtain the fuzzy output by determining the precise member of the input state; finally, after a certain defuzzification rule, the fuzzy output set is converted into a fuzzy control logic used by the precise output amount; therefore, the response speed of the PWM voltage regulation system is improved in the battery management, the battery management function is optimized and the dynamic output performance is improved.
Description
Technical field
The invention belongs to communication power supply technical field, be specifically related to control method and system that a kind of supply voltage regulates.
Background technology
Current era, information technology and communication technology develop rapidly, the coverage of communication network is more and more wider, mass communication base station is dropped into and is built, each large telecommunications and mobile communication carrier increase for the demand of communication equipment, and as requisite power supply link one Communication Power Equipment in communication equipment, its demand also significantly promotes.Under such market background, the performance that improves existing communication integrated drive generator becomes very important.Due to integrated drive generator common configuration battery-operated, battery management has become a very important module in integrated drive generator supervisory control system.PWM voltage-regulating system is the important component part in battery management, and the optimization of its performance is for improving systematic function important in inhibiting.
Utilize at present in the integrated drive generator supervisory control system of PWM mode pressure regulation, generally adopt increment closed-loop control system to realize.Compare the current-limiting mode of intelligent rectifier, PWM mode is simple and reliable, is not easy to occur graunch (such as rectifier fault, communicating interrupt, load instantaneous variation are very large etc.); And that maximum deficiency is exactly control response speed is very slow.If the battery charging voltage scope that user regulates is very large, PWM mode may need several minutes above time could adjust rectifier to output to specified electrical voltage point.This is also the inadequate natural endowment of closed-loop control system.As realized response faster, pay possibly the cost of system oscillation.
In being applicable to the numerical control system using, except closed-loop control system, also have PID and FUZZY ALGORITHMS FOR CONTROL etc.For PID, control, because integrated drive generator applied environment otherness is very large, the rectifier configuring, the otherness between the kind of battery pack is also very large, and the definite PID controller parameter of experiment method is limited to very much, cannot extensively be suitable for.And FUZZY ALGORITHMS FOR CONTROL need have deep understanding to the control object behavior being designed; For complexity and the high reliability request of communication power supply, design difficulty is quite large, therefore in communication power supply field, there is no at present successful trial and application.
Summary of the invention
The main technical problem to be solved in the present invention is that the control method and the system that provide a kind of supply voltage to regulate, optimized battery management function, improved output dynamic property.
For solving the problems of the technologies described above, the invention provides the control method that a kind of supply voltage regulates, comprise step:
Definition input state set and output state set, definition PWM fuzzy control rule, described PWM fuzzy control rule is the corresponding relation from different output states according to the various combination of input state, obtains the control result of corresponding output state; According to PWM fuzzy control rule, carry out the regulating and controlling of supply voltage.
Further, described input state set comprises voltage deviation state set, change in voltage state set and current deviation state set.
Further, described voltage deviation state set comprises following state member: output voltage is too low, output voltage is low, output voltage just in time suitable, output voltage is high, output voltage is too high; Described change in voltage state set comprises following state member: output voltage declines too soon, output voltage declines, output voltage remains unchanged, output voltage rises, output voltage rises too fast; Described current deviation state set comprises following state member: battery current is too low, battery current is low, battery current just in time suitable, battery current is high, battery current is too high.
Further, in described voltage deviation state set, state member for described output voltage just in time suitable interval value comprise that voltage deviation is in-0.3V～0.3V; State member comprises that voltage deviation is in-1V～0V for the high interval value of described output voltage; State member comprises that for the low interval value of described output voltage voltage deviation is in 0V～1V; State member comprises that voltage deviation is beyond-0.5V for the too high interval value of described output voltage; State member comprises that for the too low interval value of described output voltage voltage deviation is beyond 0.5V.
Further, in described change in voltage state set, the rate of change that the interval value that state member remains unchanged for described output voltage comprises voltage represents between-0.1V～0.1V; The rate of change that the interval value that state member rises for described output voltage comprises voltage is between-0.4V～0V; State member comprises be less than-0.3V of the rate of change of voltage for the described voltage too fast interval value that rises; The rate of change that the interval value that state member is described voltage drop comprises voltage is between 0V～0.4V; State member comprises that for the too fast interval value of described voltage drop the rate of change of voltage is greater than 0.3V.
In described current deviation state set, state member is for the described battery current deviation that just in time suitable interval value comprises battery charge is in 90%～110%; The deviation that state member comprises battery charge for the high interval value of described battery current is between 100%～140%; State member comprises that for the too high interval value of described battery current the deviation of battery charge is greater than 120%; The deviation that state member comprises battery charge for the low interval value of described battery current is between 60%～100%; State member comprises that for the too low interval value of described battery current the deviation of battery charge is less than 80%.
Further, described output state set comprises following output state: output voltage should decline a lot, output voltage should reduce, output voltage should keep, output voltage should raise, output voltage should raise a lot.
Preferably, described PWM fuzzy control rule is the corresponding relation from different output states according to the various combination of input state, obtains the control result of corresponding output state, specifically comprise following at least one:
Input state is combined as: battery current is too high, and output voltage decline is too fast, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is too high, and other change in voltage state outside output voltage decline too soon, and corresponding output state is: output voltage should decline a lot;
Input state is combined as: battery current is high, and output voltage declines or output voltage decline is too fast, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is high, and output voltage remains unchanged or output voltage rises, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is just in time suitable, and output voltage is too low or output voltage is low or output voltage is just in time suitable, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is just in time suitable, and output voltage is high, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is just in time suitable, and output voltage is too high, and corresponding output state is: output voltage should decline a lot;
Input state is combined as: battery current is low, and output voltage is too low or output voltage is low, and corresponding output state is: output voltage should raise;
Input state is combined as: battery current is low, and output voltage is just in time suitable, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is low, and output voltage is high, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is low, and output voltage is too high, and corresponding output state is: output voltage should decline a lot;
Input state is combined as: battery current is too low, and output voltage is too low, and corresponding output state is: output voltage should raise a lot;
Input state is combined as: battery current is too low, and output voltage is low, and corresponding output state is: output voltage should raise;
Input state is combined as: battery current is too low, and output voltage is just in time suitable, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is too low, and output voltage is high, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is too low, and output voltage is too high, and corresponding output state is: output voltage should decline a lot.
The control system that supply voltage regulates, comprises monitoring unit, PWM fuzzy control unit and rectifier, wherein:
Monitoring unit is for detection of the actual charge current of actual output voltage and the battery of rectifier, PWM fuzzy control unit definition input state set and output state set, definition PWM fuzzy control rule, then according to the monitored results of monitoring unit, corresponding relation according to the various combination of input state from different output states, obtain the control result of corresponding output state, and according to the control result of output state, carry out the regulating and controlling of the supply voltage of rectifier.
Further, the input state set of described PWM fuzzy control unit definition comprises voltage deviation state set, change in voltage state set and current deviation state set.
Further, the voltage deviation state set of described PWM fuzzy control unit definition comprises following state member: output voltage is too low, output voltage is low, output voltage just in time suitable, output voltage is high, output voltage is too high; The change in voltage state set of described PWM fuzzy control unit definition comprises following state member: output voltage declines too soon, output voltage declines, output voltage remains unchanged, output voltage rises, output voltage rises too fast; The current deviation state set of described PWM fuzzy control unit definition comprises following state member: battery current is too low, battery current is low, battery current just in time suitable, battery current is high, battery current is high.
Further, the output state set of described PWM fuzzy control unit definition comprises following output state: output voltage should decline a lot, output voltage should reduce, output voltage should keep, output voltage should raise, output voltage should raise a lot.
Preferably, described PWM fuzzy control rule is the corresponding relation from different output states according to the various combination of input state, obtains the control result of corresponding output state, specifically comprise following at least one:
Input state is combined as: battery current is too high, and output voltage decline is too fast, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is too high, and other change in voltage state outside output voltage decline too soon, and corresponding output state is: output voltage should decline a lot;
Input state is combined as: battery current is high, and output voltage declines or output voltage decline is too fast, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is high, and output voltage remains unchanged or output voltage rises, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is just in time suitable, and output voltage is too low or output voltage is low or output voltage is just in time suitable, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is just in time suitable, and output voltage is high, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is just in time suitable, and output voltage is too high, and corresponding output state is: output voltage should decline a lot;
Input state is combined as: battery current is low, and output voltage is too low or output voltage is low, and corresponding output state is: output voltage should raise;
Input state is combined as: battery current is low, and output voltage is just in time suitable, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is low, and output voltage is high, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is low, and output voltage is too high, and corresponding output state is: output voltage should decline a lot;
Input state is combined as: battery current is too low, and output voltage is too low, and corresponding output state is: output voltage should raise a lot;
Input state is combined as: battery current is too low, and output voltage is low, and corresponding output state is: output voltage should raise;
Input state is combined as: battery current is too low, and output voltage is just in time suitable, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is too low, and output voltage is high, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is too low, and output voltage is too high, and corresponding output state is: output voltage should decline a lot;
Input state is combined as: battery current is too low, and output voltage is too high, and corresponding output state is: output voltage should decline a lot.
The invention has the beneficial effects as follows: compared with prior art, the present invention is by determining accurate input state member, and obfuscation, obtains fuzzy output; Finally, by certain ambiguity solution rule, fuzzy output set is converted into accurate output variable and utilizes fuzzy control logic, accelerated the response speed of PWM voltage-regulating system in battery management, optimized battery management function, improved output dynamic property.
Accompanying drawing explanation
The control method flow chart that a kind of supply voltage that Fig. 1 provides for the embodiment of the present invention regulates;
The obfuscation curve of the voltage deviation EV that Fig. 2 provides for the embodiment of the present invention;
The obfuscation curve of the change in voltage error DV that Fig. 3 provides for the embodiment of the present invention;
The obfuscation curve of the current deviation EC that Fig. 4 provides for the embodiment of the present invention;
The control system block diagram that a kind of supply voltage that Fig. 5 provides for the embodiment of the present invention regulates.
Embodiment
Below by embodiment, by reference to the accompanying drawings the present invention is described in further detail.
The present invention is applied in the power supply system for communications, utilize fuzzy control logic, accelerate the response speed of PWM voltage-regulating system in battery management, the method of optimizing battery management function, raising output dynamic property is as follows: select the real physical state variable relevant to PWM pressure regulation in power-supply system, in Power Supply Monitoring, these signals are monitored accurately, and with dbjective state comparison, determine accurately input member, obfuscation, obtains fuzzy output; Finally, by certain ambiguity solution rule, fuzzy output set is converted into accurate output variable.
For the PWM pressure regulation fuzzy control to discussing below, be convenient to understand, first the method for the closed loop pressure regulation current limliting once generally adopting be at present described:
1) monitoring unit detects the actual output voltage of rectifier and the actual charge current of battery.
2), when battery does not have large current charge, if the actual output voltage of rectifier equals the charging voltage (generally in interval [target voltage-0.05, target voltage+0.09] scope) of appointment, do not need to regulate; If output voltage, higher than target voltage, must be lowered output, according to the error range between output voltage and target voltage, with the downward regulation voltage of different voltage step size; If output voltage is lower than target voltage, the stable step-length with 0.1V～0.2V raises output.
3) when the actual charge current of battery is excessive, unconditional regulation output voltage downwards, carries out the logic of current limliting pressure regulation, guarantees that battery can not overcharge, can not undercharge, conventionally keep battery charge near the cut-off current of setting (90%～110%).The current limliting desired value of battery is to calculate by battery capacity * charging current ratio.If battery is with excessive current charges, large step-length (0.5V) is lowered voltage; If battery, with large current charges, is lowered voltage with less step-length (0.1～0.3V).If the charging current of all batteries is little or low discharging current, raise output voltage, raise step-length and generally get 0.1～0.3V.
Describe the specific embodiment of the present invention below in detail.
Suppose that certain combined power supply system possesses the parts such as rectifier, direct current output, storage battery and monitoring unit of the input of exchanging, AC-DC conversion.Wherein, monitoring unit can accurately also detect the voltage of direct current output, the charging current of storage battery in real time; And by PWM mode, rectifier is carried out to voltage-regulation, to control charging voltage, the restriction charging current of battery.
Refer to shown in Fig. 1, Fig. 1 is the flow chart of PWM pressure regulation fuzzy control method, comprises the following steps:
S101, according to the configuration of combinations of communication power-supply system and performance, select the suitable PWM pressure regulation time of day variable of being correlated with, in the present embodiment, select the accurate input variable fuzzy set that " voltage deviation ", " voltage deviation variation ", " current deviation " three physical quantitys are fuzzy controller, selecting " change in duty cycle " is the accurate output variable fuzzy set of this fuzzy controller.The major control target of PWM voltage-regulating system is output voltage, and final control object is the charging current of battery, therefore the function of control system has also to a certain degree determined the selection of input state variable.
S102, these state variables of choosing are carried out effectively reliably detecting.Power supply supervision unit need to be to output voltage and battery charge the detection of carrying out degree of precision.On hardware, testing circuit can adopt high accuracy, the good components and parts of stability, coordinates on software, adopts digital filtering scheduling algorithm to go to disturb, and makes that the accuracy of detection of voltage can reach 0.5%, error ± 0.1V; The precision of battery current reaches 1%, error ± 0.1A.On the other hand, from the angle of real-time, monitoring unit with 200 millisecond periods detect output voltage and battery current; Each second is regulation output voltage periodically.Therefore,, from reliability and the promptness angle of data, output voltage and battery current are also suitable as the input variable of control system.
S103, according to the needs in the performances such as the output pressure regulation of communication power supply and battery charging management, divide the state member of the input and output fuzzy set of PWM pressure regulation Fuzzy control system, and according to the magnitude of physical quantity detecting, determine the state of the input member collection of its correspondence.
The present embodiment carries out the division of fuzzy system input/output variable member collection to system, as follows:
1) physical quantity is accurately inputted in four of definition:
VOL_TARGET target output voltage
VOL_OUT actual output voltage (measuring voltage)
CUR_LIMITED threshold currents
CUR_OUT actual charge current (measurement electric current)
2) physical quantity is accurately exported in one of definition:
The data value of N duty ratio
3) three accurate control inputs of definition:
EV=VOL_TARGET-VOL_OUT voltage deviation (target output voltage and actual output voltage poor)
DV=VOL_OUT (N)-VOL_OUT (N-1) change in voltage
EC=CUR_LIMITED-CUR_OUT current deviation (threshold currents and real electric current)
4) output is accurately controlled in one of definition:
change in duty cycle
The present embodiment has defined the state of following input member set:
1) voltage deviation EV:
EVNL output voltage is too low
EVNS output voltage is low
EVZE output voltage is just in time suitable
EVPS output voltage is high
EVPL output voltage is too high
2) change in voltage DV:
DVNL output voltage declines too fast
DVNS output voltage declines
DVZE output voltage remains unchanged
DVPS output voltage rises
DVPL output voltage rises too fast
3) current deviation EC:
ECNL battery current is too low
ECNS battery current is low
ECZE battery current is just in time suitable
ECPS battery current is high
ECPL battery current is too high
Meanwhile, defined the state of following accurate output state member set:
1) output variable:
ONL output voltage should decline a lot
ONS output voltage should reduce
OZE output voltage should keep
OPS output voltage should raise
OPL output voltage should raise a lot
Wherein, state member's codomain is that absolute FALSE is to absolute TRUE.While utilizing Single-chip Controlling PWM pressure regulation due to supervisory control system, output register is a byte, and the codomain that therefore defines each fringe member is from absolute TRUE (255) to absolute FALSE (0).
S104, each state member of the fuzzy set marking off is quantized, provided the obfuscation curve of error, and obtained corresponding quantized value, fuzzy quantization curve according to the state member value of input variable.
For convenience of calculation, the present invention rounds after voltage error, battery current error, change in voltage etc. are all multiplied by 10 times.Be introduced respectively below.
For voltage error, output voltage deviation is in ± 0.1V, and error is 0, just in time meets the required precision of the present invention to output voltage.As shown in Figure 2, error, in ± 3 (± 0.3V), represents EVZE to the obfuscation curve of voltage deviation EV; In ± 10, represent EVPS or EVNS; Beyond ± 5, represent EVPL or EVNL.Certainly, these threshold values are all adjustable.
As shown in Figure 3, change in voltage is the variable quantity of output voltage each second.If the rate of change of voltage in ± 1 (0.1V～0.1V), thinks that error is 0, represent DVZE; In-4～0 (0.4V～0V), think that voltage rises, and represents DVPS.During for-0.2V, value is 255; Be less than-2 (<-0.2V), think that voltage rises too fast, represent DVPL.During be less than-0.5V, value is 255; In 0～4 (0V～0.4V), think and represent DVNS by voltage drop.During for 0.2V, value is 255; Be greater than 2 (> 0.2V), think that voltage drop is too fast, represent DVNL.While being greater than 0.5V, value is 255; These threshold values are all also adjustable.
As shown in Figure 4, if the deviation of battery charge in ± 1 (90%～110%), error is 0; In-4～0 (100%～140%), think that battery current is high, represent ECPS, for-2 (120%) time, value is 255; Be less than-2 (> 120%), think that battery current is too high, represent ECPL, while being less than-5 (> 150%), value is 255; In 0～4 (60%～100%), think that battery current is low, represent ECNS, while being 2 (80%), value is 255; Be greater than 2 (< 80%), think that battery current is too low, represent ECNL, while being greater than 5 (< 50%), value is 255.Certainly, these threshold values are all adjustable according to actual conditions.
S105, make the control law of PWM pressure regulation fuzzy controller, and according to this control law, obtain the state member of output variable.
The PWM pressure regulation fuzzy rule that the present embodiment is formulated is as follows:
●if ECPL and DVNL then OZE
Too fast if but the too high output voltage of battery current declines, output voltage should keep
●if ECPL and (DVNS or DVZE or DVPS or DVPL)then ONL
If but the too high output voltage of battery current does not decline very soon (other change in voltage state outside output voltage decline is too fast), output voltage should decline a lot
●if ECPS and (DVNL or DVNS)then OZE
If battery current is high, too fast but output voltage declines or declines, output voltage should keep
●if ECPS and (DVZE or DVPS or DVPL)then ONS
If battery current is high, but output voltage remains unchanged or rises, and output voltage should reduce
●if ECZE and (EVNL or EVNS or EVZE )then OZE
If battery current is just in time suitable and output voltage is too low/low/just in time suitable, output voltage should keep
●if ECZE and (EVPS )then ONS
If battery current is just in time suitable and output voltage is high, output voltage should reduce
●if ECZE and (EVPL)then ONL
If battery current is just in time suitable and output voltage is too high, output voltage should decline a lot
●if ECNS and (EVNL or EVNS)then OPS
If battery current is low and output voltage is too low/low, output voltage should raise
●if ECNS and (EVZE)then OZE
If battery current is low and output voltage is just in time suitable, output voltage should keep
●if ECNS and (EVPS)then ONS
If battery current is low and output voltage is high, output voltage should reduce
●if ECNS and (EVPL)then ONL
If battery current is low and output voltage is too high, output voltage should decline a lot
●ifECNL and EVNL then OPL
If battery current is too low and output voltage is too low, output voltage should raise a lot
●ifECNL and EVNS then OPS
If battery current is too low and output voltage is low, output voltage should raise
●if ECNS and (EVZE)then OZE
If battery current is too low and output voltage is just in time suitable, output voltage should keep
●if ECNS and (EVPS)then ONS
If battery current is too low and output voltage is high, output voltage should reduce
●if ECNS and (EVPL)then ONL
If battery current is too low and output voltage is too high, output voltage should decline a lot
About PWM fuzzy control rule, in the present embodiment, when design control law, followed to a great extent PWM closed loop pressure regulation logic.The basic goal that monitoring unit is controlled output voltage is restriction battery charge, is controlling after battery charge more suitably regulation output voltage well.
For several typical examples, analyze below:
1) if battery current is very large too fast but output voltage declines, hardware current limliting of current rectifier is described, now PWM regulates not too large meaning, therefore keeps current voltage;
2) the not decline very soon of voltage if battery current is very large, now in order to protect battery to prevent from overcharging, the output voltage that should decline to a great extent immediately, reduces the pressure reduction of rectifier and battery, thereby reduces battery current, reaches the object of current limliting;
3) when battery current is just in time suitable, output voltage is lower, illustrates that now system has reduced output voltage to realize the control to battery current, so must control output voltage, can not make its rising again; Otherwise when if battery current is suitable, output voltage, higher than target voltage, now needs output voltage to be down to target voltage, and needn't consider that battery charge can reduce;
4) when battery current is lower, if output voltage lower than desired value, Yi Bian raise output voltage, Yi Bian observe battery current, if while rising to target voltage, battery does not still overcharge, can be by stable output at target voltage.If in raising voltage course, if overcharging has appearred in battery, stop raising voltage with constant charge electric current.Certainly, if output voltage has exceeded desired value, needn't worry that battery overcharge occurs, only need to lower output voltage to desired value.
S106, ambiguity solution process.After weighted average calculation by de-fuzzy, can obtain accurate
output.Here selected weight coefficient can be adjusted according to controlling effect, is mainly according to the characteristic of integrated drive generator output performance and battery management, then in conjunction with PWM pressure regulation current limliting logic, makes to control effect to the future development of expection.
It should be noted that the control of the PWM duty ratio regulating for output voltage
must limit certain scope, such as (TN ,+TN).When ONL is absolute TRUE (255),
for-30 (corresponding output voltage is lowered 0.5V); When ONS is absolute TRUE (255), corresponding
for-6 (corresponding output voltage is lowered 0.1V).When OPL is absolute TRUE (255),
be 30 (corresponding output voltage raises 0.5V); When OPS is absolute TRUE (255), corresponding
for-6 (corresponding output voltage raises 0.1V).
During ambiguity solution, real-time adjustment weight coefficient, reaches the object of regulation output pwm control signal, thereby in the situation that systems stabilisation is exported, accelerates the governing speed of output voltage.
Be illustrated for example below:
If battery current is very large, but voltage does not decline very soon, and now in order to prevent over-charging of battery, the output voltage that need to decline to a great extent, draws fuzzy output ONL according to this control law.The present invention first gives " battery current is very large " higher weight coefficient, and gives " voltage does not have to decline very soon " lower weight coefficient, when ONL is absolute TRUE (255),
for-30, corresponding output voltage is lowered to 0.5V.After downward completes, the output of observing system again, if find, battery current is still very large, fuzzy controller continues output ONL, continues to lower output voltage 0.5V.Adjust after several times, there will be battery current compared with large and output voltage is low, or the battery current suitable and low situation of output voltage just in time, now, stable cell electric current still has heavier weight coefficient.After the charging regular hour, row's voltage can rise along with the rising of cell voltage, battery charge can reduce, now, the output performance of raising system---improving output voltage will have heavier weight coefficient, and the weight that battery charge is controlled can decline, and fuzzy controller will be carried out the control law of " if battery current is low and output voltage is low; output voltage should rise " or " if battery current is just in time suitable and output voltage is low, maintenance current voltage ".
Below above-described PWM mode pressure regulation fuzzy control process is illustrated.
Mainly for battery current, charge normal and two kinds of situations of large current charge.
While supposing practical application, the configuration of certain DC communication power system is as follows: battery capacity 300Ah, 6, rectifier, load output 30A.In addition, charging current ratio is 0.15C, and even charging voltage is set to 56.4V, and float charge voltage is 53.5V, and cell voltage is 50V.Battery charging current limiter value computing formula is:
Cut-off current=battery total capacity * charging current ratio
Put aside the temperature-compensating of battery charge, battery cut-off current is 300 * 0.15=45A.
When power failure has occurred system, by storage battery, be load supplying, then service restoration, now, supposes that cell voltage is 46V, rectifier voltage starts to be started to regulate to even charging voltage 56.4V by 45.0V:
1), while starting, when rectifier voltage is during lower than the 46V of cell voltage, can not charge the battery, battery is still in discharge condition, and the fringe of input is ECNL and EVNL, and now output should be OPL, be driver output voltage fast rise, the step-length that voltage rises is 0.5V.The fuzzy input variable of now decision systems output is exactly battery current error and voltage error.
2) after output voltage rises to over 46V, rectifier starts to charge the battery, and progressively load catcher is come, the discharging current of battery reduces gradually, starts to charging transition, now, the fringe of input is still ECNL and EVNL, output is also still OPL, driver output voltage fast rise, and the step-length that voltage rises is 0.5V.The fuzzy input variable of now decision systems output is still battery current error and voltage error.
3) observe output voltage, when rising to 50V left and right, battery starts there is charging current, and during beginning, charging current is very little, and the fringe of input is ECNS and EVNL, and now output should be OPS,
The speed that voltage rises can slow down relatively, and rise step-length is 0.2V.
4) when output voltage continues to rise, now approached target voltage, the charged electrical of battery fails to be convened for lack of a quorum larger.
If the fringe of charging current reaches ECZE, the fringe of voltage is EVNS or EVZE, is now output as OZE, maintains current voltage, carries out stable charging; If rectifier pressure regulating performance is very not good, also likely charged electrical fails to be convened for lack of a quorum and occurs in short-term ECPS, and now the input state of voltage is EVZE or EVPS, now need to reduce battery charge, output ONS, lowers by 0.1V step-length, until the fringe of electric current reaches ECZE, be output as OZE.
5) if battery is charged to certain degree, charging current will reduce, until the fringe of charging current reaches ECNS, now output voltage is EVNS or is EVZE, be output as OPS or OZE: if output voltage does not reach target voltage, with 0.1V, slowly raise, until reach target voltage, can stablize output; If now output voltage has reached target voltage, regulation output voltage no longer, makes output voltage can be stabilized in desired value.
More than while having a power failure to incoming call, in battery charging and discharging curent change process, an exemplary of current limliting pressure regulation fuzzy control logic.The current state of charge of battery by ECNL to ECNS, to ECZE (may experience an of short duration ECPS state, mainly see the pressure regulating performance of rectifier), according to the variation of battery current, output voltage is regulated again, until stable output, reach the object of charging current limiter.
The situation that generally there will not be ECPL.When system blackout, battery discharge is to a certain degree causing battery to be excised from system.After system power supply recovers, battery will be linked into system by D.C. contactor again, now, may occur the situation of battery large current charge.When there is the situation of ECPS or ECPL, to determine the adjusting to output voltage according to the error change situation of voltage: if fringe is DVNL, expression rectifier is unable to supply enough output, and hardware is lowered voltage and maintained output, software need not regulate, and keeps; If fringe is DVNS, software continues slightly to lower output voltage, to reduce the charging current of battery; If fringe is DVPS, DVPL or DVZE, software need to stop raising voltage, and voltage is significantly lowered, until the charging current of battery reaches ECZE, more progressively makes output voltage approach desired value.
According to the method for above-mentioned introduction, the present embodiment also discloses the control system that a kind of supply voltage regulates, and as shown in Figure 5, comprises monitoring unit 501, PWM fuzzy control unit 502 and rectifier 503, wherein:
Monitoring unit 501 is for detection of the actual charge current of actual output voltage and the battery of rectifier 503,502 definition input state set and the output state set of PWM fuzzy control unit, then input, the quantification of output state, definition PWM fuzzy control rule, then controls the adjusting of the supply voltage of rectifier 503 according to PWM fuzzy control rule according to the monitored results of monitoring unit 501.
The input state set of described PWM fuzzy control unit 502 definition comprises voltage deviation state set, the set of voltage deviation variable condition and current deviation state set.
The voltage deviation state set of described PWM fuzzy control unit 502 definition comprises that output voltage is too low, output voltage is low, output voltage just in time suitable, output voltage is high, output voltage is too high; The voltage deviation variable condition set of described PWM fuzzy control unit definition comprises that output voltage declines too soon, output voltage declines, output voltage remains unchanged, output voltage rises, output voltage rises too fast; The current deviation state set of described PWM fuzzy control unit definition comprises that battery current is too low, battery current is low, battery current just in time suitable, battery current is high, battery current is high.
The output state set of described PWM fuzzy control unit 502 definition comprises that output voltage should decline a lot, output voltage should reduce, output voltage should keep, output voltage should raise, output voltage should raise a lot.
The PWM fuzzy control rule of described PWM fuzzy control unit 502 definition comprise following at least one:
Input state is combined as: battery current is too high, and output voltage decline is too fast, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is too high, and other change in voltage state outside output voltage decline too soon, and corresponding output state is: output voltage should decline a lot;
Input state is combined as: battery current is high, and output voltage declines or output voltage decline is too fast, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is high, and output voltage remains unchanged or output voltage rises, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is just in time suitable, and output voltage is too low or output voltage is low or output voltage is just in time suitable, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is just in time suitable, and output voltage is high, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is just in time suitable, and output voltage is too high, and corresponding output state is: output voltage should decline a lot;
Input state is combined as: battery current is low, and output voltage is too low or output voltage is low, and corresponding output state is: output voltage should raise;
Input state is combined as: battery current is low, and output voltage is just in time suitable, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is low, and output voltage is high, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is low, and output voltage is too high, and corresponding output state is: output voltage should decline a lot;
Input state is combined as: battery current is too low, and output voltage is too low, and corresponding output state is: output voltage should raise a lot;
Input state is combined as: battery current is too low, and output voltage is low, and corresponding output state is: output voltage should raise;
Input state is combined as: battery current is too low, and output voltage is just in time suitable, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is too low, and output voltage is high, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is too low, and output voltage is too high, and corresponding output state is: output voltage should decline a lot.
In sum, the embodiment of the present invention is in the existing integrated drive generator supervisory control system with the pressure regulation of PWM mode, select the real physical state variable relevant to PWM pressure regulation in power-supply system, in Power Supply Monitoring, these signals are monitored accurately, and with dbjective state comparison, determine the accurately member of input, obfuscation, obtains fuzzy output; Finally, by certain ambiguity solution rule, fuzzy output set is converted into accurate output variable.To optimize the mode of PWM voltage-regulating system, improve battery management performance.By adopting fuzzy control logic, both guaranteed the stability of system, accelerated again the response speed of PWM voltage-regulating system in current battery management, can optimize battery management function, carry out efficient battery management, improve the dynamic property of output.
Above content is in conjunction with concrete execution mode further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (9)
1. the control method that supply voltage regulates, is characterized in that, comprises step:
Definition input state set and output state set, described input state set comprises voltage deviation state set, change in voltage state set and current deviation state set, definition PWM fuzzy control rule, described PWM fuzzy control rule is the corresponding relation from different output states according to the various combination of input state, obtain the control result of corresponding output state, specifically comprise following at least one:
Input state is combined as: battery current is too high, and output voltage decline is too fast, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is too high, and other change in voltage state outside output voltage decline too soon, and corresponding output state is: output voltage should decline a lot;
Input state is combined as: battery current is high, and output voltage declines or output voltage decline is too fast, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is high, and output voltage remains unchanged or output voltage rises, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is just in time suitable, and output voltage is too low or output voltage is low or output voltage is just in time suitable, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is just in time suitable, and output voltage is high, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is just in time suitable, and output voltage is too high, and corresponding output state is: output voltage should decline a lot;
Input state is combined as: battery current is low, and output voltage is too low or output voltage is low, and corresponding output state is: output voltage should raise;
Input state is combined as: battery current is low, and output voltage is just in time suitable, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is low, and output voltage is high, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is low, and output voltage is too high, and corresponding output state is: output voltage should decline a lot;
Input state is combined as: battery current is too low, and output voltage is too low, and corresponding output state is: output voltage should raise a lot;
Input state is combined as: battery current is too low, and output voltage is low, and corresponding output state is: output voltage should raise;
Input state is combined as: battery current is too low, and output voltage is just in time suitable, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is too low, and output voltage is high, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is too low, and output voltage is too high, and corresponding output state is: output voltage should decline a lot;
According to PWM fuzzy control rule, carry out the regulating and controlling of supply voltage.
2. the method for claim 1, is characterized in that, described voltage deviation state set comprises following state member: output voltage is too low, output voltage is low, output voltage just in time suitable, output voltage is high, output voltage is too high; Described change in voltage state set comprises following state member: output voltage declines too soon, output voltage declines, output voltage remains unchanged, output voltage rises, output voltage rises too fast; Described current deviation state set comprises following state member: battery current is too low, battery current is low, battery current just in time suitable, battery current is high, battery current is too high.
3. method as claimed in claim 2, is characterized in that, in described voltage deviation state set, state member for described output voltage just in time suitable interval value comprise that voltage deviation is in-0.3V～0.3V; State member comprises that voltage deviation is in-1V～0V for the high interval value of described output voltage; State member comprises that for the low interval value of described output voltage voltage deviation is in 0V～1V; State member comprises that voltage deviation is beyond-0.5V for the too high interval value of described output voltage; State member comprises that for the too low interval value of described output voltage voltage deviation is beyond 0.5V.
4. method as claimed in claim 2, is characterized in that, in described change in voltage state set, the rate of change that the interval value that state member remains unchanged for described output voltage comprises voltage represents between-0.1V～0.1V; The rate of change that the interval value that state member rises for described output voltage comprises voltage is between-0.4V～0V; State member comprises be less than-0.3V of the rate of change of voltage for the described voltage too fast interval value that rises; The rate of change that the interval value that state member is described voltage drop comprises voltage is between 0V～0.4V; State member comprises that for the too fast interval value of described voltage drop the rate of change of voltage is greater than 0.3V.
5. method as claimed in claim 2, is characterized in that, in described current deviation state set, state member is for the described battery current deviation that just in time suitable interval value comprises battery charge is in 90%～110%; The deviation that state member comprises battery charge for the high interval value of described battery current is between 100%～140%; State member comprises that for the too high interval value of described battery current the deviation of battery charge is greater than 120%; The deviation that state member comprises battery charge for the low interval value of described battery current is between 60%～100%; State member comprises that for the too low interval value of described battery current the deviation of battery charge is less than 80%.
6. the method for claim 1, it is characterized in that, described output state set comprises following output state: output voltage should decline a lot, output voltage should reduce, output voltage should keep, output voltage should raise, output voltage should raise a lot.
7. the control system that a supply voltage regulates, it is characterized in that, comprise monitoring unit, PWM fuzzy control unit and rectifier, wherein: monitoring unit is for detection of the actual charge current of actual output voltage and the battery of rectifier, PWM fuzzy control unit definition input state set and output state set, the input state set of described PWM fuzzy control unit definition comprises voltage deviation state set, change in voltage state set and current deviation state set; Definition PWM fuzzy control rule, then according to the monitored results of monitoring unit, corresponding relation according to the various combination of input state from different output states, obtains the control result of corresponding output state, and according to the control result of output state, carries out the regulating and controlling of the supply voltage of rectifier; Described PWM fuzzy control rule is the corresponding relation from different output states according to the various combination of input state, obtains the control result of corresponding output state, specifically comprise following at least one:
Input state is combined as: battery current is too high, and output voltage decline is too fast, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is too high, and other change in voltage state outside output voltage decline too soon, and corresponding output state is: output voltage should decline a lot;
Input state is combined as: battery current is high, and output voltage declines or output voltage decline is too fast, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is high, and output voltage remains unchanged or output voltage rises, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is just in time suitable, and output voltage is too low or output voltage is low or output voltage is just in time suitable, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is just in time suitable, and output voltage is high, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is just in time suitable, and output voltage is too high, and corresponding output state is: output voltage should decline a lot;
Input state is combined as: battery current is low, and output voltage is too low or output voltage is low, and corresponding output state is: output voltage should raise;
Input state is combined as: battery current is low, and output voltage is just in time suitable, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is low, and output voltage is high, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is low, and output voltage is too high, and corresponding output state is: output voltage should decline a lot;
Input state is combined as: battery current is too low, and output voltage is too low, and corresponding output state is: output voltage should raise a lot;
Input state is combined as: battery current is too low, and output voltage is low, and corresponding output state is: output voltage should raise;
Input state is combined as: battery current is too low, and output voltage is just in time suitable, and corresponding output state is: output voltage should keep;
Input state is combined as: battery current is too low, and output voltage is high, and corresponding output state is: output voltage should reduce;
Input state is combined as: battery current is too low, and output voltage is too high, and corresponding output state is: output voltage should decline a lot.
8. system as claimed in claim 7, it is characterized in that, the voltage deviation state set of described PWM fuzzy control unit definition comprises following state member: output voltage is too low, output voltage is low, output voltage just in time suitable, output voltage is high, output voltage is too high; The change in voltage state set of described PWM fuzzy control unit definition comprises following state member: output voltage declines too soon, output voltage declines, output voltage remains unchanged, output voltage rises, output voltage rises too fast; The current deviation state set of described PWM fuzzy control unit definition comprises following state member: battery current is too low, battery current is low, battery current just in time suitable, battery current is high, battery current is high.
9. system as claimed in claim 8, it is characterized in that, the output state set of described PWM fuzzy control unit definition comprises following output state: output voltage should decline a lot, output voltage should reduce, output voltage should keep, output voltage should raise, output voltage should raise a lot.
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| CN103592983B (en) * | 2013-10-30 | 2015-10-14 | 浪潮电子信息产业股份有限公司 | A kind of dynamic voltage regulation method for designing based on fuzzy control |
| TWI512647B (en) | 2014-09-10 | 2015-12-11 | Ind Tech Res Inst | Battery charging method |
| CN104852380B (en) * | 2015-05-08 | 2017-03-15 | 天津大学 | One kind improves feeder voltage regulator accurately control method |
| CN105489955B (en) * | 2015-12-04 | 2017-11-03 | 浙江海悦自动化机械股份有限公司 | A kind of charging method |
| CN108594233B (en) * | 2018-04-24 | 2020-07-14 | 森思泰克河北科技有限公司 | Speed ambiguity resolving method based on MIMO automobile radar |
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