CN2672938Y - Independently operating solar energy photovoltaic power station controller - Google Patents
Independently operating solar energy photovoltaic power station controller Download PDFInfo
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- CN2672938Y CN2672938Y CN 200320131510 CN200320131510U CN2672938Y CN 2672938 Y CN2672938 Y CN 2672938Y CN 200320131510 CN200320131510 CN 200320131510 CN 200320131510 U CN200320131510 U CN 200320131510U CN 2672938 Y CN2672938 Y CN 2672938Y
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Abstract
The utility model discloses an independently operating solar energy photovoltaic power station controller which is composed of a main circuit and a control-driven circuit. The main circuit adopts a DC-DC conversion circuit. The control-driven circuit adopts a simulation and digital hybrid circuit. The simulation portion realizes the drive and the protection of the main circuit. The digital portion realizes the charging administration algorithm. In the charging process, the maximal power tracking technique can be realized. The charging algorithm gives the driving signal of the simulation portion. Simultaneously, the utility model has the functions of liquid crystal display, key board operation and communication. The utility model has the advantages that the modular design consideration which can discretionarily extend the capacity of a photovoltaic power station can be suitable for batch production; the simulation and digital hybrid circuit has compact conformation, complete function, and high reliability; the battery charging process can be effectively controlled according to the characteristic of a solar energy battery; the solar energy resource can be used sufficiently, the charging efficiency can be improved, and the system cost can be reduced; the battery charging process can be administrated effectively, and the service life of the battery can be improved.
Description
Technical field
The utility model relates to the solar photovoltaic power plant controller, particularly relates to the solar photovoltaic power plant controller of independent operating.
Background technology
Development along with China's photovoltaic cause; the solar photovoltaic generation system of utilization independent operating solves outlying district, the islander's household electricity away from electrical network, the effect that communications service power supply, oil pipeline cathodic protection and frontier guards's household electricity problem performance become more and more important.Controller is the important component part of independent operating solar photovoltaic generation system, and the quality of its performance will directly influence the result of use of solar photovoltaic generation system.The major function of controller is to realize storage battery charge and discharge management, keeps the power supply balance of photovoltaic system, and the fail safe of maintenance system corollary equipment makes full use of solar energy resources, improves the service efficiency of photo-voltaic power supply, prolongs the useful life of corollary equipment.
The comparatively miniaturization of controller of external development and design, the controller that has has only the control circuit part, and the main circuit part often needs other configuration, and majority circuit adopts the mode of break-make control, the controller that has has been realized maximal power tracing according to the characteristics of solar photocell, but electric pressure is lower, and comparatively miniaturization, be difficult for expansion, only be fit to small-sized family photovoltaic power supply system.Mainly contain two kinds of control technologys and the controller of domestic use extensively adopts, the first is taked the mode control relay of multichannel control by simple analog circuit.Mainly realize the charge and discharge control of storage battery, when the solar cell array charging makes storage battery reach allowable upper limit value, cut off charging by detecting battery tension; When load discharge makes battery tension drop to the protection value, cut off output.The shortcoming of this control technology is because the fluctuation of battery tension can cause relay switch frequently to switch, and failure rate is higher, and battery charging process is difficult to realize that charge efficiency is lower, does not consider Solar cell performance; It two is to adopt MOSFET or IGBT constant power device, opens, turn-offs storage battery is charged by judging battery tension power controlling device, utilization PWM pulse-width modulation restriction electric current when charging current is big.Management improves though this method is to charge in batteries, but because solar cell is influenced by temperature, intensity of sunshine and load etc., it is unsettled electric power system, this controller does not take into full account the characteristics of solar cell to carry out Charge Management and utilizes limited solar energy resources to improve charge efficiency, reduce system cost, so also there is significant disadvantages in this control method.
The utility model content
The purpose of this utility model provides a kind of novel independent operating solar photovoltaic power plant controller, optimizes the design of present solar photovoltaic power plant controller.This controller adopts modularized design, does not need to design the controller of different capabilities, can expand the photovoltaic plant capacity arbitrarily.The utility model mainly is made up of main circuit and control Driver Circuit two parts: main circuit adopts the DC-DC translation circuit; control Driver Circuit adopts analog-and digital-hybrid circuit; the simulation part realizes the driving and the protection of main circuit; numerical portion is then realized the Charge Management algorithm; realize the maximal power tracing technology in the process that recharges here, provide the drive signal of simulation part by charging algorithm.The utlity model has liquid crystal display and keyboard operation and communication function simultaneously.
Compare with above-mentioned controller circuitry and the utlity model has following advantage:
1, modularized design thinking can be expanded the photovoltaic plant capacity arbitrarily, suitable batch production;
2, simulation, digital hybrid circuit, compact conformation, multiple functional, reliability is higher;
3, according to the characteristic of solar cell, effectively control battery charging process;
4, make full use of solar energy resources, improve charge efficiency, reduce system cost;
5, effective management of battery charging process improves storage battery useful life.
The utility model has not only been finished the basic function that controller need be realized, and according to the characteristics of solar photovoltaic generation system, hardware circuit adopts hybrid circuit structure, has realized MPPT maximum power point tracking, has solved the deficiency that above-mentioned photovoltaic plant controller exists.
Description of drawings
Fig. 1 is the solar energy photovoltaic system theory diagram.
Fig. 2 is the utility model controller principle block diagram.
Fig. 3 is the concrete execution mode circuit diagram of the utility model controller.
Fig. 4 is the utility model main circuit control section schematic diagram.
Fig. 5 is the utility model microprocessor and expansion schematic diagram thereof.
Fig. 6 is the utility model accessory power supply part schematic diagram.
Fig. 7 is management of the utility model charge in batteries and maximal power tracing coordination principle block diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is further described.
Fig. 1 is the solar photovoltaic power plant systematic schematic diagram.As shown in the figure, photovoltaic array is made up of solar module, it produces direct current under irradiation of sunlight, via controller is to charge in batteries, simultaneously to inverter power supply, penetrate when more weak or do not have under the irradiation of sunlight at the light width of cloth, storage battery is directly powered to inverter by controller, and inverter becomes alternating current to direct current and powers to the load.The controller major function is to regulate control photovoltaic voltage, electric current to charge in batteries, possesses simultaneously storage battery is overcharged, crosses and defencive function such as put.
The utility model controller principle block diagram is as shown in Figure 2: mainly by DC-DC conversion main circuit, drive buffer circuit, integrated PWM and protective circuit, little control and treatment circuit and auxiliary power circuit and form.Main circuit adopts the DC-DC translation circuit, drives to isolate driving amplification, the isolation that is mainly used in power device, and integrated PWM and protective circuit are mainly used in the driving and the overcurrent protection of power device and feed back to the microprocessor over current fault; Little control and treatment circuit is by gathering battery tension, electric current, and the estimation battery capacity is carried out the charge in batteries management in conjunction with maximal power tracing output PWM waveform.To drive buffer circuit, integrated PWM and protective circuit and auxiliary power circuit and constitute simulation control part, microcontroller circuit, keyboard-display circuit and communicating circuit constitute digital control circuit, A part and B part shown in Fig. 2 controller principle block diagram.
The concrete execution mode circuit of the utility model controller is as shown in Figure 3: by DC-DC conversion main circuit 1, drive buffer circuit 2, integrated PWM and protective circuit 3, little control and treatment circuit 4 and auxiliary power circuit 5 and form.DC-DC conversion main circuit 1 is connected with driving buffer circuit 2 respectively; the output output voltage 19 of DC-DC conversion main circuit 1, output current 14 connect the circuit 20 and the circuit 6 of integrated PWM and protective circuit 3 respectively; DC-DC conversion main circuit 1 is connected with driving buffer circuit 2 respectively; the input input voltage 18 of DC-DC conversion main circuit 1, input current 17 connect a and the b of the amplitude limiter circuit 7 of little control and treatment circuit 4 respectively, and battery tension 15 and battery current 16 are connected d, the c of the circuit 7 of little control and treatment circuit 4 respectively.Drive buffer circuit 2 and be connected with DC-DC conversion main circuit 1, auxiliary power circuit 5 respectively, 22 circuit that drive buffer circuit 2 are connected the circuit 21 of DC-DC conversion main circuit 1 with 23 circuit, connect 9,10 circuit of auxiliary power circuit 5.Integrated PWM and protective circuit 3 are connected with driving buffer circuit 2, microprocessor control circuit 4, auxiliary power circuit 5 respectively; the circuit 24 of integrated PWM and protective circuit 3 connects the circuit 11 of the circuit 22, circuit 23 and the auxiliary power circuit 5 that drive buffer circuit 2; 26,27 circuit of 24 circuit of integrated PWM and protective circuit 3 and little control and treatment circuit 4 link to each other, and connect PI regulating circuit 20, current amplification circuit 6.Little control and treatment circuit 4 is connected with auxiliary power circuit 5, collection battery tension 15, battery current 16, main circuit input voltage circuit 17 (photovoltaic array voltage), main circuit input current circuit 18 (photovoltaic array electric current) respectively.25 circuit of little control and treatment circuit 4 are connected with 12 of auxiliary power circuit, 25 circuit of little control and treatment circuit 4 are changed amplitude limiter circuit 7 with A/D respectively, isolation input circuit 26, spacing output circuit 27, PC communicating circuit, keyboard operation are connected with LCD display circuit, LED display circuit, and circuit 25I/O exported and puts control circuit e connection storage battery output control circuit 46 simultaneously.
Described as shown in Figure 4 DC-DC conversion main circuit 1 is total to negative pole by two groups of DC-DC translation circuits 21 and forms, DC-DC translation circuit 1 is made up of power switch pipe 28, diode 29, filter inductance 30, filter capacitor 31, and two groups of circuit have two pairs of power switch pipes 28, diode 29, filter inductance 30, filter capacitor 31.Conducting, shutoff by drive waveforms driving power switching tube 28 come control output voltage and output current, diode 29 afterflow effects, and filter inductance 30 makes power switch pipe be operated in the continuous and on-off state of inductive current, and filter inductance 31 filters output ripple.The main circuit input is a solar photocell, and output enters storage battery.
Described as shown in Figure 3 driving buffer circuit 2 is made up of isolating amplifier circuit 22 and 23, isolating amplifier circuit 22 and 23 is connected the power device drive end of two main circuits respectively, isolating amplifier circuit light lotus root 22 and 23 by accessory power supply 9,10 provide respectively+the 15V power supply amplifies driving.
Described as shown in Figure 3 integrated PWM and protective circuit 3 are made up of integrated pwm circuit 24, current amplification circuit 6, main circuit output sampled voltage circuit 19 and voltage regulator circuit 20.Integrated pwm circuit 24 is core devices, can realize more function, wherein go to realize the main-circuit protection function by monitoring voltage and the current signal that feeds back by integrated pwm circuit 24, by accessory power supply 11 provide+integrated pwm circuit 24 power supplys of 15V power supply voltage supplying, the regulated voltage signal 27 that reception is sent from microprocessor, deliver to of the variation of integrated pwm circuit 24 by the major loop output current that shunt 14 is gathered through current amplification circuit 6, overcurrent, short circuit are reacted by inner comparison circuit monitoring current; Gather the main circuit output voltage by sampled voltage circuit 19, deliver to integrated pwm circuit 24, carry out voltage stabilizing output by the ON time that Voltage Feedback is regulated power switch pipe by integrated pwm circuit 24 through PI regulating circuit 20.
The protective circuit feedback that described as shown in Figure 3 microprocessor control circuit 4 constitutes by microprocessor and expanded circuit 25 thereof, analog quantity input saturation circuit 7, analog quantity output PWM isolation filter circuit 27, by integrated pwm circuit 24 through isolate input circuit 26 and PC communication serial ports, keyboard, LCD shows and forms.Microprocessor and expanded circuit 25 thereof connect analog quantity input saturation circuit 7, analog quantity output PWM isolation filter circuit 27, feedback isolation input circuit 26 and PC communication serial ports, keyboard, LCD demonstration respectively.
The microprocessor of described as shown in Figure 5 microprocessor control circuit 4 and expanded circuit 25 thereof show extended chip 40 by master controller Intel chip 40 80C196MC, two address extension bus chip 36,37, data/address bus chip 38, RAM extended chip 35 and ROM extended chip 39, keyboard and LCD, and A/D change-over circuit 32, D/A change-over circuit 33 (PWMO), LED show extended chip 41 compositions.Also comprise input, output I/ O circuit 48,47 in addition, with PC communication serial port circuit 45.In the foregoing circuit, connect extended address bus, data/address bus, keyboard and LCD expansion by main control chip usually, the D/A change-over circuit itself has A/D and D/A change-over circuit, input, output I/O circuit.A/D change-over circuit 33 (PWMO) connects analog quantity output PWM isolation filter circuit 27; D/A change-over circuit 32 connects analog quantity input saturation circuit 7; keyboard shows that with LCD extended chip 40 is connected keyboard 42 and LCD 43; LED shows that extended chip 41 connects LED and shows 44; input I/O circuit 48 is connected with protective circuit feedback isolation input circuit 26; by two 8 bit address expansion bus chips 36; 37 form 16 bit address buses connects RAM extended chip 35 and ROM extended chip 39, data/address bus chip 38 respectively with RAM extended chip 35; ROM extended chip 39; keyboard and LCD show extended chip 40; LED shows that extended chip 41 connects.
Described as shown in Figure 3 auxiliary power circuit 5 is inverse-excitation type switch power-supplies of multichannel output, is made up of voltage stabilizing circuit 9,10,11,12 and main circuit 13. Voltage stabilizing circuit 9,10,11,12 is connected with main circuit 13; high-quality power supply is provided; voltage stabilizing circuit 9 connects the isolating amplifier circuit 22 that drives buffer circuit 2; voltage stabilizing circuit 10 connects the isolating amplifier circuit 23 that drives buffer circuit 2; voltage stabilizing circuit 11 connects the integrated pwm circuit 24 of integrated PWM and protective circuit 3; voltage stabilizing circuit 12 connects the microprocessor and the expanded circuit 25 thereof of microprocessor control circuit 4; main circuit 13 former limits provide power supply by battery tension, and secondary connects voltage stabilizing circuit 9,10,11,12 behind rectifying and wave-filtering.
The main circuit 13 of described as shown in Figure 6 auxiliary power circuit 5 is by short circuit, current foldback circuit 28, single channel input multichannel output Industrial Frequency Transformer circuit 30, rectification circuit 50,51,52,53; filter circuit 54,55,56,57, power switch pipe 31, pwm control circuit 29 are formed.Pwm control circuit 29 is core devices, itself possesses multiple function, regulates power switch pipe 31 by rising, and allows transformer export stable alternating voltage, and its periphery needs expansion to detect and the PI regulating circuit is realized its strong functions.Overcurrent protection 28 connects the storage battery input; be connected to the former limit of Industrial Frequency Transformer circuit 30 then; the lower end, former limit of following frequency power transformer circuit 30 connects power switch pipe 31; power switch pipe 31 connects pwm control circuit 29; the secondary output of Industrial Frequency Transformer circuit 30 connects rectification circuit 50,51,52,53; connect voltage stabilizing circuit 9,10,11,12 respectively through filter circuit 54,55,56,57 after the rectification output, export required direct voltage at last.
Further the course of work of the present invention is described below:
The solar battery group anode that is total to negative pole by two-way is imported main circuit behind the counnter attack diode, main circuit is total to negative pole by two BUCK circuit and is formed by connecting.Main circuit power switch pipe 28 is by drive circuit 22,23 driving work, drive circuit drives and removes to drive main circuit according to the output of dedicated PWM integrated circuit 24, the output of dedicated PWM integrated circuit 24 provides set-point adjustment by the A/D circuit 33 of microcontroller circuit 25, and main circuit carries out work according to the output voltage current value of design.Bury the A part shown in the block diagram and the B part course of work is described in detail with Fig. 2 controller is former below.
A partly is that simulation control part is a core with dedicated PWM integrated circuit 24, and by dedicated PWM integrated circuit 24 output two-way drive signals, output is isolated the switching device 28 that amplifies in each BUCK branch road of rear drive through light lotus root 22,23.Dedicated PWM integrated circuit 24 is provided by auxiliary power circuit 9, by the PWM waveform of microprocessor 25 output through filter circuit, lotus root isolates light, PI delivers to dedicated PWM integrated circuit 24 after regulating voltage stabilizing, regulate the output voltage electric current by the ON time of adjusting power switch pipe, adjust output voltage to set-point.Detect main circuit feedback voltage and feedback current simultaneously, feedback voltage by output voltage behind circuit 19 electric resistance partial pressures, controlled voltage and periodic waveform be back output pulse width modulating wave relatively, and shaping is amplified after PI regulating circuit 20 is given driving dedicated PWM integrated circuit 24, realizes output voltage stabilization.Feedback current detects and adopts shunt 14 to deliver to dedicated PWM integrated circuit 24 after LM358 circuit 6 amplifies.PWM integrated circuit 24 has comparison circuit, and when electric current surpasses set point, dedicated PWM integrated circuit 24 can be protected at once, blocks PWM output, stops PWM output by buffer circuit 26 notice microprocessors simultaneously, protection main circuit power switch pipe 28.The accessory power supply outbalance of simulation control part; have than the multichannel output voltage; major loop adopts single-end flyback switching power supply; input is made short-circuit protection circuit 28 by protective tube; select for use current-mode control chip UC3845 as pwm chip 29; device for power switching adopts MOSFET 31; by the anti-Industrial Frequency Transformer 30 that swashs the output of single channel input multichannel; in secondary output 3 road direct currents are arranged; through half-wave rectifying circuit 50; 51; 52; 53; through filter capacitor 54; 55; 56; after 57; through 7812 chips 9; 10; 3 tunnel 15 volts of DC power supply of output after 11 voltage stabilizings; 1 tunnel 5 volt of DC power supply of output after 12 voltage stabilizings of 7805 chips; dedicated PWM integrated circuit 24 and driving amplifying circuit 22 for the back; 23 work, and supply with microcontroller circuit 25 and do the power supply use.Integrated PWM and protective circuit 3 adopt SG3525A, and light lotus root 22,23 is adopted TLP250, and shunt is FLQ88-30A/47mA.
Digital control part B adopts the 80C196MC of the Intel Company microprocessor of 16 bit as the master controller chip; this processor not only has multi-channel A/D change-over circuit; waveform generator (WG) with 6 tunnel outputs; be adapted to control three phase alternating current motor and various bridge inverter main circuit especially; also have two kinds of PWM outputs; in addition; 80C196MC has the outer protection interrupt function; overcurrent to main circuit; short circuit; protection is in real time done in overvoltage; and has a programmable Dead Time set-up function; as long as, can realize pulse-width modulation with the pairing pulse duration input of pulse-width signal relevant register.
The digital control part B of the utility model adopts Intel80C196 chip 40 as the control core, configuration expansion RAM 36 and expansion ROM 39,8255 chips, 40 extended keyboards and LCD show, gather photovoltaic voltage 17 and photovoltaic electric current 18 and gather bus-bar battery tension 15 and electric current 16 by Hall element by the LEM module, all be converted to the normal voltage signal, after amplitude limiter circuit 7, deliver to D/A mouth 32 and gather calculating.I/O mouth output control line connects LCD and shows 43; and output switching value control D.C. contactor prevents that storage battery from crossing and puts generation that I/O mouth 48 input simulation control part are blocked output signal through the fault-signal that buffer circuit 26 provides; realize defencive function, LCD goes up display alarm simultaneously.LED 44 display controllers (green) working properly, break down (red), connect by 74LS377 extended chip 41,80C196MC chip 40 is by D/A conversion 33 battery tensions that obtain, battery current, photovoltaic voltage, the photovoltaic electric current, battery conditions such as ambient temperature, by the adjustable PWM waveform of A/D conversion 33 outputs, software programming simultaneously realizes the control algolithm (comprising the maximal power tracing control algolithm) of battery charging process, charging algorithm is converted into PWM output, the A/D change-over circuit 33 output pwm waveforms that have by self, the waveform of output is through 27 filtering of 6N136 chip, the light lotus root isolates, control integrated PWN chip 24 outputs and remove to drive main circuit, adjust the main circuit output voltage to set-point.The 80C196 chip also disposes MAX232 communication interface chip 45 and carries out communication with PC, selects to check current service data by keyboard operation 42, revises the setting of accumulator protecting point, checks operational factor and historical data by LCD circuit 43.
Introduce the battery charging process control algolithm below, be described in detail respectively by three phases:
(1) when detecting battery tension and be lower than a certain value power shortage, controller begins charging, and in this process, microprocessor adopts maximal power tracing, guarantees the output of solar cell maximum power.Adopt the way of fixed voltage trace point, at first determine the output voltage values Vref of solar cell working solar cell when maximum power point, change solar cell then and make solar cell be stabilized in Vref, realized maximal power tracing (introducing in detail in the back) the charging current of storage battery.Monitor battery tension and charge in batteries electric current simultaneously in real time, by battery current estimation battery capacity, when battery tension reaches certain value and charge in batteries electric current and is reduced to a certain degree, stop maximal power tracing and change next stage charging process over to.When illumination is strong, battery tension rises very fast, monitoring charge in batteries electric current, at this moment the charge in batteries electric current is still bigger, shows that at this moment the charge in batteries capacity does not reach requirement, needs PWM modulation limitations charging current, battery tension is lowered, continue charging, avoided so only detecting the battery tension virtual height and cut off input, cause the waste of energy and the undercharge of storage battery.
(2) in this stage, can not carry out maximal power tracing again, just limit battery tension and can not surpass overcharged voltage and charge, detect charging current simultaneously, when detecting electric current when very little, illustrate that storage battery is approaching to be full of, change next process over to.
(3) in this stage, with storage battery float charge voltage constant voltage, keep the needs of storage battery self-discharge, when battery tension drops to a certain degree, will repeat first process above the beginning.
The battery discharging process control:
In the battery discharging process; the voltage that needs the monitoring storage battery; when voltage is lower than certain value; cut off outside output; when the big guiding discharge electric current of load capacity is very big, cause that battery tension descends significantly, need regulate the device for power switching angle of flow by the electric current of monitoring storage battery; reduce output current, promote the protection point of battery tension and prevent too early cut-out.
What deserves to be mentioned is that each of storage battery protection magnitude of voltage is provided by the battery manufacturer man in stage, but the easy temperature influence of battery tension and changing should be provided with storage battery charge and discharge voltage protection point according to variation of temperature.The computational methods of temperature-compensating are:
V
b(T)＝[V25+a
t(T-25)]N
c
V
b(T) voltage of expression storage battery under T ℃;
V
25The voltage (standard) of expression storage battery under 25 ℃;
a
tExpression battery temp coefficient (providing) by producer;
N
cExpression storage battery quantity;
The maximal power tracing control algolithm is described below:
1, MPPT maximum power point tracking principle:
People's power points follow the tracks of be one from searching process, adopt " climbing method " can follow the tracks of maximum power point.By detection to photovoltaic cell current output voltage and electric current, obtain the power output of current photovoltaic cell, to make comparisons with the previous moment photovoltaic cell power of having stored again, house is deposited big for a short time, detects again, compares again.So ceaselessly go round and begin again, photovoltaic cell dynamically is operated on the maximum power point.I-V output characteristic I=f (U) relation of photovoltaic cell is a monotropic function, therefore, as long as keep the output voltage V pv of photovoltaic cell, under any solar irradiance and temperature, can both keep the pairing magnitude of voltage of corresponding maximum power point in real time, just can guarantee all to export its maximum power in any moment.
2, MPPT maximum power point tracking algorithm:
This controller is followed the tracks of the maximum power point of photovoltaic cell by the value of control Vref, concrete method is by taking the increase and decrease photovoltaic cell output reference voltage Vref in cycle, and the actual output voltage Vpv of photovoltaic cell follows the tracks of Vref by closed-loop control makes the working point follow the tracks of maximum power point.
If record the photovoltaic cell current output power is P (K), and the memory power of stored previous moment is P (k-1), and a (k-1) and a (k) are respectively the voltage increment of previous moment and current time Vref.If recorded: P (K)＞P (k-1), then the symbol of increment a (k-1) value of previous moment Vref is judged in continuation.If a (k-1)＞0 illustrative system is operated in the left side of maximum power point on the P-V curve near maximum power point, put increment a (k)=dV of current time Vref, then Vref (k)=Vref (k-1)+dV.If a (k-1)＜0, then illustrative system is operated in the right side of maximum power point on the P-V curve.For near maximum power point, put a (k)=dV, then Vref (k)=Vref (k-1)-dv.Otherwise, if recorded: P (K)＞P (k-1), in like manner carry out opposite operation.Thereby, but the peak power output point of real-time tracking photovoltaic cell and dynamically maintenance.
Fig. 7 provides management of the utility model charge in batteries and maximal power tracing coordination principle block diagram, elaborates in the battery charging process control algolithm.
The utility model solar photovoltaic power plant controller has following good effect:
1, simple in structure, multiple functional, be easy to expanded function;
2, separately advantage is given full play in number, moding circuit combination;
3, adopt modular construction, reliability is higher, is fit to batch production;
4, operability is good, can adapt to relatively poor running environment.
Claims (4)
1, a kind of independent operating solar photovoltaic power plant controller, it is characterized in that it by DC-DC conversion main circuit [1], drive buffer circuit [2], integrated PWM and protective circuit [3], little control and treatment circuit [4] and auxiliary power circuit [5] and form; DC-DC conversion main circuit [1] is connected with driving buffer circuit [2] respectively, and the rear end output voltage [19] of DC-DC conversion main circuit [1], output current [14] connect the circuit [20] and the circuit [6 of integrated PWM and protective circuit [3] respectively; The front end input voltage [18] of DC-DC conversion main circuit [1], input current [17] connect [a], [b] of the circuit [7] of little control and treatment circuit [4] respectively, and battery tension [15] and battery current [16] are connected [c], [d] of the circuit [7] of little control and treatment circuit [4] respectively; Driving buffer circuit [2] is connected with DC-DC conversion main circuit [1], auxiliary power circuit [5] respectively, [22] circuit that drives buffer circuit [2] is connected the circuit [21] of DC-DC conversion main circuit [1] with [23] circuit, connect [9], [10] circuit of auxiliary power circuit [5]; Integrated PWM and protective circuit [3] are connected with driving buffer circuit [2], microprocessor control circuit [4], auxiliary power circuit [5] respectively, [24] circuit of integrated PWM and protective circuit [3] connects [22] circuit, [the 23] [circuit [11] of circuit and auxiliary power circuit [5] that drives buffer circuit [2], [24] circuit of integrated PWM and protective circuit [3] links to each other with [26] of little control and treatment circuit [4], [27] circuit, connects PI regulating circuit [20], current amplification circuit [6]; Little control and treatment circuit [4] is connected with auxiliary power circuit [5], collection battery tension [15], battery current [16], photovoltaic array voltage [17], photovoltaic array electric current [18] respectively; [25] circuit of little control and treatment circuit [4] is connected with [12] of auxiliary power circuit, [25] circuit of little control and treatment circuit [4] is changed amplitude limiter circuit [7] with A/D respectively, isolation input circuit [26], spacing output circuit [27], PC communicating circuit, keyboard operation are connected with LCD display circuit, LED display circuit, and circuit [25] I/O exported and puts control circuit e connection storage battery output control circuit [46] simultaneously.
2, according to the said a kind of independent operating solar photovoltaic power plant controller of claim 1, it is characterized in that DC-DC conversion main circuit [1] is total to negative pole by two groups of DC-DC translation circuits [21] and forms, DC-DC translation circuit [21] is made up of power switch pipe [28], diode [29], filter inductance [30], filter capacitor [31]; Conducting, shutoff by drive waveforms driving power switching tube [28] come control output voltage and output current, diode [29] afterflow effect, and filter inductance [30] makes the power switch pipe operating current continuously with interrupted, and filter inductance [31] filters output ripple.
3, according to claim 1 or 2 described a kind of independent operating solar photovoltaic power plant controllers, it is characterized in that driving buffer circuit [2] by isolating amplifier circuit [22] with [23 form, isolating amplifier circuit [22] and [23] are connected the power device drive end of two main circuits respectively, adopt that light lotus root and accessory power supply provide+the 15V power supply isolates amplification; Integrated PWM and protective circuit [3] are made up of integrated pwm circuit [24], current amplification circuit [6], main circuit output sampled voltage circuit [19] and voltage regulator circuit [20]; Integrated pwm circuit [24] is provided+the 15V supply voltage by accessory power supply, the regulated voltage signal that reception is sent from microprocessor, the major loop output current of being gathered by shunt [14] is delivered to the variation of integrated pwm circuit monitoring current through current amplification circuit [6], and overcurrent, short circuit are reacted; Gather the main circuit output voltage by sampled voltage circuit [19], deliver to integrated pwm circuit [24], regulate power switch pipe by Voltage Feedback and carry out voltage stabilizing output through PI regulating circuit [20].Auxiliary power circuit [5] is the inverse-excitation type switch power-supply of multichannel output, is made up of voltage stabilizing circuit [9], [10], [11], [12] and main circuit [13]; Voltage stabilizing circuit [9], [10], [11], [12] provide high-quality power supply, voltage stabilizing circuit [9] connects the isolating amplifier circuit [22] that drives buffer circuit [2], voltage stabilizing circuit [10] connects the isolating amplifier circuit [23] that drives buffer circuit [2], voltage stabilizing circuit [11] connects the integrated pwm circuit [24] of integrated PWM and protective circuit [3], voltage stabilizing circuit [12] connects the microprocessor and the expanded circuit [25] thereof of microprocessor control circuit [4], and main circuit [13] provides power supply by battery tension; Wherein main circuit [13] is by short circuit, current foldback circuit [28], single channel input multichannel output Industrial Frequency Transformer circuit [30], rectification circuit [50], [51], [52], [53], filter circuit [54], [55], [56], [57], power switch pipe [31], pwm control circuit [29] are formed; Overcurrent protection [28] connects the storage battery input, and filter circuit [54], [55], [56], [57] connect voltage stabilizing circuit [9], [10], [11], [12] respectively, export required direct voltage.
4,, it is characterized in that microprocessor control circuit [4] is shown and formed by microprocessor and expanded circuit [25] thereof, analog quantity input saturation circuit [7], analog quantity output PWM isolation filter circuit [27], protective circuit feedback isolation input circuit [26] and PC communication serial ports, keyboard, LCD according to any one described a kind of independent operating solar photovoltaic power plant controller of claim 1 to 3;
The microprocessor of microprocessor control circuit [4] and expanded circuit [25] thereof show extended chip [40] by master controller Intel chip 4080C196MC, two address extension bus chips [36], [37], data/address bus chip [38], RAM extended chip [35] and ROM extended chip [39], keyboard and LCD, A/D change-over circuit [32], D/A change-over circuit [33] are (PWMO), LED shows that extended chip [41] forms, also comprise input, output I/O circuit [48], [47], with PC communication serial port circuit [45]; D/A change-over circuit [33] (PWMO) connects analog quantity and exports PWM isolation filter circuit [27]; A/D change-over circuit [32] connects analog quantity input saturation circuit [7]; keyboard shows that with LCD extended chip [40] is connected keyboard [42] and LCD[43]; LED shows that extended chip [41] connects LED and shows [44]; output I/O circuit [48] is connected with protective circuit feedback isolation input circuit [26]; by two 8 bit address expansion bus chips [36]; [37] form 16 bit address buses and connect RAM extended chip [35] and ROM extended chip [39], data/address bus chip [38] respectively with RAM extended chip [35]; ROM extended chip [39]; keyboard and LCD show extended chip [40]; LED shows that extended chip [41] connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320131510 CN2672938Y (en) | 2003-12-29 | 2003-12-29 | Independently operating solar energy photovoltaic power station controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320131510 CN2672938Y (en) | 2003-12-29 | 2003-12-29 | Independently operating solar energy photovoltaic power station controller |
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