CN102832691A - Power supply switching device and method - Google Patents
Power supply switching device and method Download PDFInfo
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- CN102832691A CN102832691A CN2011101596795A CN201110159679A CN102832691A CN 102832691 A CN102832691 A CN 102832691A CN 2011101596795 A CN2011101596795 A CN 2011101596795A CN 201110159679 A CN201110159679 A CN 201110159679A CN 102832691 A CN102832691 A CN 102832691A
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The invention provides a power supply switching device and a method. A loading power supply is switched between a solar power generation system and a commercial power system according to electric quantity of the solar power generation system, different load types and/or power consumption. The power supply switching device comprises a switching unit for switching the power supply of each load between the solar power generation system and the commercial power system; a load measuring unit for obtaining characteristics of each load and determining real-time running state of each load; a candidate load list determining unit for determining whether the load is supplied by the solar power generation system according to the characteristics of each load and the current real-time running state; and a power supplying load determining unit for controlling the switching unit to switch the loading power supply to be supplied by the solar power generation system when the candidate load list determining unit determines that the load power can be supplied by the solar power generation system.
Description
Technical field
The present invention relates to field of solar energy utilization; More specifically; Relate to a kind of power supply source switching device and method; According to electric weight, unequally loaded type and/or the power consumption of solar power system, the power supply of load is switched between solar power system and commercial power system (civil power).
Background technology
Along with the development of society, energy-conservation problem is paid attention to by people day by day, solar energy since its advantage such as pollution-free, renewable, inexhaustible obtained using widely.Solar photovoltaic generation system is a kind of system that utilizes solar energy to generate electricity.Whether by linking with public electric wire net, solar photovoltaic generation system can be divided into independent operating and be incorporated into the power networks dual mode.The photovoltaic generating system of independent operating is a kind of very important mode that present solar energy power generating is used, and its application is very extensive.But; Because the power output of solar-energy photo-voltaic cell is altered a great deal by the influence of sun light intensity and ambient temperature; And can not storage power; Therefore the solar photovoltaic generation system of independent operating must be equipped with the energy storage storage battery and store and regulate electric energy, is electric jointly by solar-energy photo-voltaic cell and storage battery.Since every day intensity of illumination and environment such as temperature variation, the power output of solar-energy photo-voltaic cell also changes constantly; The running status of usefulness electric loadings such as the electrical equipment of household internal also changes in time, causes the total power consumption of load also to change in time.Sometimes; The power output of solar-energy photo-voltaic cell adds that the electric weight of storage battery can support the loads that all moving; The power supply of all loads of needs at this moment is set to solar powered, preferentially to make full use of solar energy, reaches and saves cost and purpose of energy saving; And sometimes, solar poweredly be not enough to support whole loads, at this time the power supply of fractional load need switch to commercial power system (civil power), continuous service that could proof load.
List of references 1 (the open JP 2001-95180A of Japanese patent application) discloses a kind of power supply with load and between source power supply and storage battery, has carried out device for switching.The purpose of this switching device shifter is the load overload that solves source power supply, when the load that predicts source power supply will be transshipped, load is switched to by storage battery power supply.
1. list of references 1 is predicted current service data according to the history data of load, but in fact historical data and current date do not have correlation, predict that by historical data current data is inaccurate;
2. list of references 1 is through the operation of prediction load, and the load that possibly occur transshipping for prediction switches to by storage battery power supply in advance.But, owing to predict that based on historical data the service data of some moment loads is inaccurate, and the unpredictable overload of possibility to some load, overload still can take place in a large number.
Summary of the invention
The objective of the invention is: according to the characteristic and the real-time running state of load, confirm that which load can be by solar powered, and, select solar energy to be fully used by solar powered load according to the generating total amount of solar energy.
According to first scheme of the present invention, a kind of power supply source switching device has been proposed, comprising: switch unit is used for the power supply of each load is switched between solar power system and commercial power system; Load measuring unit is used to obtain the characteristic of each load, and the real-time running state of confirming each load; The unit is confirmed in candidate's load tabulation, is used for according to the characteristic of each load and the real-time running state of current time thereof, confirms whether said load can be supplied power by solar power system; And the unit is confirmed in the power supply load; Be used for to each load; When said candidate's load tabulation confirms that the unit confirms that said load can be supplied power by solar power system, control said switch unit, the power supply of said load is switched to by solar power system supply power.
Preferably, said load measuring unit utilizes the service data and/or the history data of each load, obtains the characteristic of each load; Perhaps said load measuring unit is read the performance data or the property list of said load from each load, obtains the characteristic of each load.
Preferably, the characteristic of load comprises: the lowest high-current value of load and/or whether be resistive load.
Preferably, said candidate's load tabulation confirms that the unit is directed against each load, according to the characteristic of said load and the real-time running state of current time thereof, confirms whether said load is in running status; When definite said load is in running status,, confirm further whether said load is resistive load then according to the characteristic of said load; When definite said load was resistive load, then definite said load can be supplied power by solar power system.
Preferably; Said candidate's load tabulation confirms that the unit is when definite said load is not resistive load; Then, confirm further whether the current current value of said load equals the lowest high-current value of said load according to the characteristic of said load and the real-time running state of current time thereof; And when the current current value of confirming said load equaled the lowest high-current value of said load, then definite said load can be supplied power by solar power system.
Preferably, during said candidate's load tabulation confirms will to confirm to be tabulated by all loads adding candidate loads of solar power system power supply in the unit.
Preferably; Said power supply source switching device also comprises: the solar power system monitoring means; Be used to obtain the reference output power of solar power system; The reference output power of unit according to solar power system confirmed in wherein said power supply load, and according to the reference output power of solar power system and the method for load power consumption coupling, which load in candidate's load tabulation of further confirming to be generated by the definite unit of said candidate's load tabulation can be supplied power by solar power system.
Preferably, said solar power system monitoring means is directly read current real-time power output, power output as a reference from solar power system; Perhaps said solar power system monitoring means adopts curve-fitting method, dopes the energy output data of solar power system, as a reference power output.
Preferably, said power supply load confirms that the reference output power of the solar power system that the unit adopts and the method for load power consumption coupling are: greedy algorithm, knapsack algorithm or back-track algorithm.
According to alternative plan of the present invention, a kind of power supply changing method has been proposed, comprising: the characteristic that obtains each load; Confirm the real-time running state of each load; According to the characteristic of each load and the real-time running state of current time thereof, confirm whether said load can be supplied power by solar power system; And if confirm that said load can be supplied power by solar power system, the power supply of said load is switched to by solar power system supplies power.
Preferably, utilize the service data and/or the history data of each load, obtain the characteristic of each load; Perhaps read the performance data or the property list of said load, obtain the characteristic of each load from each load.
Preferably, the characteristic of load comprises: the lowest high-current value of load and/or whether be resistive load.
Preferably, confirm whether said load can be comprised by the step of solar power system power supply:,, confirm whether said load is in running status according to the characteristic of said load and the real-time running state of current time thereof to each load; If confirm that said load is in running status,, confirm further whether said load is resistive load then according to the characteristic of said load; If confirm that said load is a resistive load, then definite said load can be supplied power by solar power system.
Preferably; Confirm whether said load can also be comprised by the step of solar power system power supply: if confirm that said load is not a resistive load; Then, confirm further whether the current current value of said load equals the lowest high-current value of said load according to the characteristic of said load and the real-time running state of current time thereof; And if the current current value of confirming said load equals the lowest high-current value of said load, confirm that then said load can be supplied power by solar power system.
Preferably, confirm whether said load can also be comprised by the step of solar power system power supply: will confirm and to add by all loads of solar power system power supply in candidate's load tabulation.
Preferably; After confirming the step whether said load can be supplied power by solar power system; The power supply of said load is switched to by before the solar power system power supply, and said power supply changing method also comprises: the reference output power that obtains solar power system; According to the reference output power of solar power system,, confirm that further which load in candidate's load tabulation can be supplied power by solar power system according to the reference output power of solar power system and the method for load power consumption coupling.
Preferably, directly read current real-time power output, power output as a reference from solar power system; Perhaps adopt curve-fitting method, dope the energy output data of solar power system, as a reference power output.
Preferably, the method for the reference output power of solar power system and load power consumption coupling is: greedy algorithm, knapsack algorithm or back-track algorithm.
According to the present invention, on the one hand, avoided changing because of the operation conditions of load, cause rush of current to solar power system.On the other hand, avoided variation, and caused the power supply instability of fractional load and can not normally move or solar energy utilizes inadequate problem because of the energy output of solar power system.
Description of drawings
Through below in conjunction with description of drawings the preferred embodiments of the present invention, will make above-mentioned and other purpose of the present invention, feature and advantage clearer, wherein:
Fig. 1 is the exemplary system block diagram according to power supply source switching device 100 of the present invention;
Fig. 2 is the schematic flow diagram according to power supply changing method of the present invention;
Fig. 3 shows the schematic flow diagram that the concrete operations of step S315 are confirmed in candidate's load tabulation;
Fig. 4 is the sketch map of curve-fitting method that is used to explain the power output of prediction solar power system;
Fig. 5 shows the schematic flow diagram that the concrete operations of step S325 are confirmed in the power supply load.
In institute of the present invention drawings attached, same or analogous structure and step are all with same or analogous designated.
Embodiment
To a preferred embodiment of the present invention will be described in detail, in the description process, having omitted is unnecessary details and function for the present invention with reference to the accompanying drawings, obscures to prevent understanding of the present invention caused.
Fig. 1 is the exemplary system block diagram according to power supply source switching device 100 of the present invention.
As shown in Figure 1, power supply source switching device 100 according to the present invention comprises: solar power system detecting unit 1010, power supply load confirm that unit 1020, the definite unit 1030 of candidate's load tabulation, load measuring unit 1040 (comprise to load 1070
1Load measuring unit 1040
1And to load 1070
2Load measuring unit 1040
2) and diverter switch 1050 (comprise to socket 1060
1With load 1070
1Diverter switch 1050
1And to socket 1060
2With load 1070
2Diverter switch 1050
2).In the example depicted in fig. 1, only show two loads 1070
1With 1070
2, and respectively to these two loads 1070
1With 1070
2Load measuring unit 1040
1With 1040
2, diverter switch 1050
1With 1050
2, and socket 1060
1With 1060
2But; Should be noted that; The present invention is not limited to the concrete quantity of load, load measuring unit, diverter switch and socket, and those skilled in the art can design the load measuring unit with varying number and the power supply source switching device 100 of diverter switch as required.In the following description, for simplicity, in the time needn't distinguishing, with load 1070
1With 1070
2Be referred to as load 1070, with load measuring unit 1040
1With 1040
2Be referred to as load measuring unit 1040, with diverter switch 1050
1With 1050
2Be referred to as diverter switch 1050, and with socket 1060
1With 1060
2Be referred to as socket 1060.
Diverter switch 1050 is used for the power supply of each load 1070 is switched between solar power system and commercial power system (civil power).The input of each diverter switch 1050 is power supply and mains-supplied system power supplies of solar power system; Diverter switch 1050 is switched between two kinds of power supplys; Power supply is exported to continuous socket 1060, and the power input line of load 1070 is inserted on the socket 1060.Under initial condition, diverter switch 1050 is connected mains system, and breaks off solar power system, and after the mains switch of load 1070 was opened, load 1070 brought into operation under the power supply of mains system at first.
Load measuring unit 1040 is used to obtain the characteristic of each load 1070, and the real-time running state of confirming each load 1070.Load measuring unit 1040 links to each other with the output of diverter switch 1050, after load 1070 energising, and the electric power data of sensing lead 1070 (electric current, voltage, power etc.) in real time.The output of all load measuring units 1040 all confirms that with candidate's load tabulation unit 1030 links to each other.Load measuring unit 1040 can utilize the history data of each load 1070, obtains the characteristic of each load 1070.Perhaps, to intelligent appliance of future generation, load measuring unit 1040 can be read the performance data or the property list of this load 1070 from each load 1070, and the characteristic that obtains each load 1070 (includes but not limited to: the lowest high-current value of load; Whether be resistive load etc.).For example, load measuring unit 1040 can comprise Hall current sensor and Hall voltage transducer, is respectively applied for the current value and the magnitude of voltage of sensing lead 1070; Load measuring unit 1040 can calculate the power of load 1070 according to current value that measures and magnitude of voltage.
Candidate's load tabulation confirms that unit 1030 is used for according to the characteristic of each load 1070 and the real-time running state of current time thereof, and confirming can be by candidate's load tabulation of solar power system power supply.The concrete constructive process of candidate's load tabulation can will carry out detailed description after a while with reference to step S315 among the figure 2 and flow process shown in Figure 3.
Solar power system monitoring means 1010 is used to obtain the reference output power PV of solar power system.Solar power system monitoring means 1010 can directly be read current real-time power output, power output PV as a reference from solar power system.Perhaps, said solar power system monitoring means 1010 can adopt curve-fitting method, dopes the energy output data of solar power system, as a reference power output PV.About curve-fitting method, can be with reference to example shown in Figure 4, particular content can be with reference to after a while to the detailed description of step S320 among Fig. 2 and curve chart shown in Figure 4.
The power supply load confirms that unit 1020 is used for the reference output power PV according to solar power system; According to the reference output power of solar power system and the method for load power consumption coupling; Which load in candidate's load tabulation of confirming to be generated by the definite unit 1030 of candidate's load tabulation can be supplied power by solar power system; Utilize diverter switch 1050, the power supply of these loads is switched to solar power system, and the power supply of other loads is kept/switch to commercial power system (civil power).Here, the method for the reference output power of solar power system and load power consumption coupling can adopt greedy algorithm (after a while, will be described in detail with reference to figure 5), also can adopt multiple known method such as knapsack algorithm or back-track algorithm.
Power supply source switching device 100 according to the present invention may be implemented as single apparatus assembly, and its input is the power line of commercial power system and the power line of solar power system, and its output is the lead that links to each other with each socket.Can install additional according to power supply source switching device 100 of the present invention at power supply service wire place, have the advantage of comprehensive wiring.
Fig. 2 is the schematic flow diagram according to power supply changing method of the present invention.
Below, will combine Fig. 1 and Fig. 2, specify according to power supply changing method of the present invention.
At first, at step S305, obtain the characteristic of load 1070 by load measuring unit 1040.Here, can utilize the service data and/or the history data (electric current, voltage and power) of load, confirm the characteristic of load.For example, according to the history data of load, can determine the lowest high-current value of this load; Perhaps, whether according to the service data of load, can determine this load is resistive load.Perhaps, as the additional function of intelligent appliance of future generation, can read the performance data or the property list of load from load itself (intelligent appliance), thereby the various characteristics of determining load (includes but not limited to: the lowest high-current value of load; Whether be resistive load etc.).
Next, at step S310, confirm the real-time running state of load 1070 by load measuring unit 1040.For example, can measure magnitude of voltage and the current value etc. of load 1070.
At step S315, confirm unit 1030 according to the characteristic of load 1070 and the real-time running state of current time thereof by candidate's load tabulation, confirming can be by candidate's load tabulation of solar power system power supply.
Carry out this candidate's load tabulation and confirm that the reason of step is:
When
some load (like resistive load) switches to the running status of big power consumption, big electric current in the running status from low-power consumption, little electric current; Electric current can not take place significantly to suddenly change; So for this type load; No matter which kind of running status it is in, can be as candidate's load of solar power system power supply;
As an example, Fig. 3 shows the schematic flow diagram that the concrete operations of step S315 are confirmed in candidate's load tabulation.With reference to figure 3, at first,, empty candidate's load tabulation at step S3150.Then, begin,,, judge whether this load is in running status according to the performance data of load and the real-time running state of current time thereof at step S3151 from arbitrary load.
At present; Most of household electrical appliances all have idle function, therefore, and when load inserts according to power supply source switching device of the present invention for the first time; Can carry out following self study process; Confirm the holding state of load: if load measuring unit 1040 measures the electric current of load by diminishing greatly suddenly, the electric current after reducing is less than 1 ampere, and then candidate's load tabulation confirms that unit 1030 judgement loads get into holding state.
Perhaps, can know the holding state of load through the standby command that infrared remote controller sent of household electrical appliances.In this case, can in power supply source switching device according to the present invention, install an infrared signal reception unit (not shown) additional, receive the standby command that infrared remote controller sent of household electrical appliances.When the user passes through infrared remote controller when standby command is sent in load; Load gets into holding state; Infrared signal reception unit also receives this standby command simultaneously; If meanwhile load measuring unit 1040 also measure load electric current by diminishing greatly suddenly; Then candidate's load tabulation confirms that unit 1030 judges that loads get into holding states, and standby command coding that infrared signal reception unit is received and the load current data that measure are preserved as historical data, and this historical data judges whether load gets into the reference frame of standby after being.
Or, as the additional function of intelligent appliance of future generation, when load gets into standby, with holding state message with the mode of communication send to candidate's load tabulation confirm unit 1030 (through or obstructed overload measuring unit 1040).
If confirm that at step S3151 load is not in running status (step S3151 " denys "),, confirm to have installed according to whether also there being other load in the system of power supply source switching device of the present invention then at step S3152.If confirm that at step S3151 load is in running status (step S3151 " is "),,, judge further whether load is resistive load according to the performance data of load then at step S3153.
If confirm that at step S3153 load is resistive load (step S3153 " is "); Then at step S3155; This load is joined in candidate's load tabulation; Then, return step S3152, confirm to have installed according to whether also there being other load in the system of power supply source switching device of the present invention.Otherwise if confirm that at step S3153 load is not resistive load (step S3153 " denys "), then execution in step S3154 according to the performance data of load, judges further whether the current current value of load equals the lowest high-current value of this load.
If confirm that at step S3154 the current current value of load equals the lowest high-current value of this load (step S3154 " is "); Then at step S3155; This load is joined in candidate's load tabulation; Then, return step S3152, confirm to have installed according to whether also there being other load in the system of power supply source switching device of the present invention.Otherwise; If confirm that at step S3154 the current current value of load is not equal to the lowest high-current value of this load (step S3154 " denys "); Then directly return step S3152, confirm to have installed according to whether also there being other load in the system of power supply source switching device of the present invention.
If confirm also to exist in the system next load (step S3152 " existence "),, return step S3151 and carry out the running status judgement then to next load at step S3152.If confirm not exist in the system other load (step S3152 " does not exist "), then accomplish candidate's load tabulation and confirm step S315 at step S3152.
Return Fig. 2,, obtain the reference output power PV of solar power system by solar power system monitoring means 1010 at step S320.
Here, solar power system monitoring means 1010 can directly be read current real-time power output, power output PV as a reference from solar power system.
Perhaps, solar power system monitoring means 1010 can adopt Forecasting Methodology, dopes the energy output data of solar power system during the current switching judging cycle, as a reference power output PV.
As a kind of optional Forecasting Methodology, Fig. 4 shows the sketch map of the curve-fitting method of the power output of predicting solar power system.The photovoltaic cell capable of generating power amount of solar energy receives the influence of illumination and variation of ambient temperature; Because the variation of illumination and ambient temperature is slowly; Can adopt the value of the solar-energy photo-voltaic cell energy output of a plurality of moment point detections in the computing cycle (during the last switching judging cycle), and adopt the method for curve fit to predict the next computing cycle solar power generation amount in (during the current switching judging cycle).With reference to figure 4; In a computing cycle (switching judging cycle); Solar power system monitoring means 1010 t0, t1 ..., tn moment point detect the energy output data P0 of each corresponding solar power system constantly, P1 ..., Pn; Shown in stain among Fig. 4, the energy output P (t) of match solar power system concerns P (t)=at with the quadratic equation of time t then
2+ bt+c; Find the solution coefficient a, b, c; According to least square method; According to known moment t0, t1 ..., tn and corresponding detected value P0, P1 ..., Pn, calculate coefficient a, b, c, with the initial of current switching judging cycle and end constantly as the time independent variable t resulting quadratic equation P of substitution (t)=at
2+ bt+c, the energy output data at whole story that calculates (doping) during the current switching judging cycle are selected with in initial and the energy output data that end obtains as independent variable t constantly less one, as a reference power output PV.Like this, owing to consider the variation of energy output data, can realize the coupling of energy output and load power consumption better.
Return Fig. 2, step S325, the reference output power PV of unit 1020 according to solar power system confirmed in the power supply load, according to the method for reference output power PV and load power consumption coupling, confirms that which load in candidate's load tabulation can be by solar powered.Here, the method for the reference output power PV of solar power system and load power consumption coupling can adopt greedy algorithm, also can adopt knapsack algorithm or back-track algorithm to wait and realize.The purpose of this step S325 is: the reference output power PV according to solar power system selects suitable load in candidate's load tabulation; Make the total power consumption of selecteed load be no more than the reference output power PV of solar power system; And, the power output of solar power system can be fully utilized as much as possible near reference output power PV.
As a kind of optional implementation of step S325, the schematic flow diagram that Fig. 5 shows when adopting greedy algorithm, the concrete operations of step S325 are confirmed in the power supply load.
With reference to figure 5, at first,, can be made as 0 (CW=0) by the gross power CW of the load of solar power system power supply at step S3250.
Then, at step S3251,, the load in candidate's load tabulation (in step S315, obtaining) is sorted according to realtime power (in step S310, the obtaining) order from big to small of each load.
At step S3252, first load after the ordering (load that realtime power is maximum) is made as present load.
Next, carry out the core procedure S3253～S3256 of greedy algorithm.At step S3253, whether the realtime power of judging the CW+ present load is smaller or equal to the reference output power PV of solar power system.If the realtime power of CW+ present load is smaller or equal to the reference output power PV (step S3253 " is ") of solar power system; Then at step S3254; Confirm that present load can be supplied power by solar power system, and upgrade can be by the gross power CW of the load of solar power system power supply, the realtime power of CW=CW+ present load in addition; After upgrading completion, change step S3255.If the realtime power of CW+ present load then directly changes step S3255 greater than the reference output power PV (step S3253 " denys ") of solar power system.At step S3255, whether also there is next load in the candidate's load tabulation after confirming to sort.If also have next load (step S3255 " existence ") in the tabulation of the candidate's load after step S3255 confirms ordering, then at step S3256, next load after the ordering is made as present load, then, return step S3253.If do not have next load (step S3255 " does not exist ") in the tabulation of the candidate's load after step S3255 confirms ordering, then accomplish the power supply load and confirm step S325.
Return Fig. 2; After step S325 is confirmed in completion power supply load; At step S330; Unit 1020 control its switch 1050 are confirmed in the power supply load, with in the candidate's load tabulation final confirm those can switch to solar power system by the power supply of the load of solar power system power supply, and the power supply of other loads is switched to commercial power system (civil power).
At last, at step S335, whether judgement time reaches next power supply switching judging cycle, if do not have, then returns step S335, continues to wait for; If reach next power supply switching judging cycle, then return step S310, the power supply switching judging process of a beginning new round.According to the present invention, the power supply switching judging cycle is the time period that can set according to actual conditions, for example, duration arbitrarily such as can be set to 5 minutes, 10 minutes, 30 minutes.The power supply switching judging cycle is provided with shortly more, then the real-time working state of the energy output of tracking solar electricity generation system and load more well.But, to switch for fear of frequent power supply, the power supply switching judging cycle also should not be provided with too shortly.
So far invention has been described in conjunction with the preferred embodiments.But, should be noted in the discussion above that said units and step also not all are absolutely necessary.In order to realize optimum efficiency of the present invention, the inventor has provided the foregoing description.But, for the embodiment of some suboptimums, can dispense wherein some unit and step, and still can realize basic conception of the present invention and effect.For example; For some application or initial condition, possibly not need the real-time energy output of tracking solar electricity generation system, at this moment; From the purpose of avoiding rush of current; Can only carry out candidate's load tabulation and confirm step S315, and in step S330, all candidate's loads in candidate's load tabulation all switched to by solar power system supply power; And needn't execution in step S320 and S325.Correspondingly, in this case, can omit solar power system monitoring means 1010 and confirm unit 1020, confirm that unit 1030 comes the operation of control its switch 1050 and change by candidate's load tabulation with the power supply load.Below only be to this suboptimum embodiment for example, those skilled in the art can adjust the function and the operating sequence of these unit and step voluntarily according to actual conditions and demand.These adjusted embodiment also should be understood that to be encompassed within the design of the present invention.
Should be appreciated that, strictly say that embodiments of the invention also can be implemented as software program on the data processing equipment, software and hardware, or independent software and/or independent circuit.
So far invention has been described in conjunction with the preferred embodiments.Should be appreciated that those skilled in the art can carry out various other change, replacement and interpolations under the situation that does not break away from the spirit and scope of the present invention.Therefore, scope of the present invention is not limited to above-mentioned specific embodiment, and should be limited accompanying claims.
Claims (18)
1. power supply source switching device comprises:
Switch unit is used for the power supply of each load is switched between solar power system and commercial power system;
Load measuring unit is used to obtain the characteristic of each load, and the real-time running state of confirming each load;
The unit is confirmed in candidate's load tabulation, is used for according to the characteristic of each load and the real-time running state of current time thereof, confirms whether said load can be supplied power by solar power system; And
The unit is confirmed in the power supply load; Be used for to each load; When said candidate's load tabulation confirms that the unit confirms that said load can be supplied power by solar power system, control said switch unit, the power supply of said load is switched to by solar power system supply power.
2. power supply source switching device according to claim 1, wherein
Said load measuring unit utilizes the service data and/or the history data of each load, obtains the characteristic of each load; Perhaps
Said load measuring unit is read the performance data or the property list of said load from each load, obtains the characteristic of each load.
3. power supply source switching device according to claim 1 and 2, wherein
The characteristic of load comprises: the lowest high-current value of load and/or whether be resistive load.
4. power supply source switching device according to claim 3, wherein
The unit is confirmed in said candidate's load tabulation
To each load,, confirm whether said load is in running status according to the characteristic of said load and the real-time running state of current time thereof;
When definite said load is in running status,, confirm further whether said load is resistive load then according to the characteristic of said load;
When definite said load was resistive load, then definite said load can be supplied power by solar power system.
5. power supply source switching device according to claim 4, wherein
The unit is confirmed in said candidate's load tabulation
When definite said load is not resistive load,, confirm further whether the current current value of said load equals the lowest high-current value of said load then according to the characteristic of said load and the real-time running state of current time thereof; And
When the current current value of confirming said load equaled the lowest high-current value of said load, then definite said load can be supplied power by solar power system.
6. according to claim 4 or 5 described power supply source switching devices, wherein
The unit is confirmed in said candidate's load tabulation
Can add by all loads of solar power system power supply in candidate's load tabulation confirming.
7. power supply source switching device according to claim 6 also comprises:
The solar power system monitoring means is used to obtain the reference output power of solar power system,
The reference output power of unit according to solar power system confirmed in wherein said power supply load; According to the reference output power of solar power system and the method for load power consumption coupling, which load in candidate's load tabulation of further confirming to be generated by the definite unit of said candidate's load tabulation can be supplied power by solar power system.
8. power supply source switching device according to claim 7, wherein
Said solar power system monitoring means is directly read current real-time power output, power output as a reference from solar power system; Perhaps
Said solar power system monitoring means adopts curve-fitting method, dopes the energy output data of solar power system, as a reference power output.
9. according to claim 7 or 8 described power supply source switching devices, wherein
Said power supply load confirms that the reference output power of the solar power system that the unit adopts and the method for load power consumption coupling are: greedy algorithm, knapsack algorithm or back-track algorithm.
10. power supply changing method comprises:
Obtain the characteristic of each load;
Confirm the real-time running state of each load;
According to the characteristic of each load and the real-time running state of current time thereof, confirm whether said load can be supplied power by solar power system; And
Can supply power by solar power system if confirm said load, the power supply of said load switched to by solar power system supply power.
11. power supply changing method according to claim 10, wherein
Utilize the service data and/or the history data of each load, obtain the characteristic of each load; Perhaps
Read the performance data or the property list of said load from each load, obtain the characteristic of each load.
12. according to claim 10 or 11 described power supply changing methods, wherein
The characteristic of load comprises: the lowest high-current value of load and/or whether be resistive load.
13. power supply changing method according to claim 12 confirms wherein whether said load can be comprised by the step of solar power system power supply:
To each load,, confirm whether said load is in running status according to the characteristic of said load and the real-time running state of current time thereof;
If confirm that said load is in running status,, confirm further whether said load is resistive load then according to the characteristic of said load;
If confirm that said load is a resistive load, then definite said load can be supplied power by solar power system.
14. power supply changing method according to claim 13 confirms wherein whether said load can also be comprised by the step of solar power system power supply:
If confirm that said load is not a resistive load,, confirm further whether the current current value of said load equals the lowest high-current value of said load then according to the characteristic of said load and the real-time running state of current time thereof; And
Equal the lowest high-current value of said load if confirm the current current value of said load, then definite said load can be supplied power by solar power system.
15., confirm wherein whether said load can also be comprised by the step of solar power system power supply according to claim 13 or 14 described power supply changing methods:
Can add by all loads of solar power system power supply in candidate's load tabulation confirming.
16. power supply changing method according to claim 15 after confirming that said load whether can the step by the solar power system power supply, switches to the power supply of said load by before the solar power system power supply, also comprises:
Obtain the reference output power of solar power system;
According to the reference output power of solar power system,, confirm that further which load in candidate's load tabulation can be supplied power by solar power system according to the reference output power of solar power system and the method for load power consumption coupling.
17. power supply changing method according to claim 16, wherein
Directly read current real-time power output, power output as a reference from solar power system; Perhaps
Adopt curve-fitting method, dope the energy output data of solar power system, as a reference power output.
18. according to claim 16 or 17 described power supply changing methods, wherein
The method of the reference output power of solar power system and load power consumption coupling is: greedy algorithm, knapsack algorithm or back-track algorithm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101596795A CN102832691A (en) | 2011-06-14 | 2011-06-14 | Power supply switching device and method |
| JP2012112600A JP2013005717A (en) | 2011-06-14 | 2012-05-16 | Power supply switching device and power supply switching method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101596795A CN102832691A (en) | 2011-06-14 | 2011-06-14 | Power supply switching device and method |
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| WO2019184610A1 (en) * | 2018-03-28 | 2019-10-03 | 山东科技大学 | Access control device and method for domestic load based on renewable energy and mains power supply |
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| JP2017169309A (en) * | 2016-03-15 | 2017-09-21 | 株式会社デンソー | Power supply system |
| CN106451754A (en) * | 2016-12-07 | 2017-02-22 | 国网浙江杭州市富阳区供电公司 | Looped network cabinet distribution type power utilization system |
| JP7011907B2 (en) * | 2017-08-28 | 2022-01-27 | 東京瓦斯株式会社 | Power supply, power supply control |
| CN116581828A (en) * | 2023-07-14 | 2023-08-11 | 深圳市晶昶能新能源科技有限公司 | Photovoltaic energy storage optimization control method, system and storage medium |
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| JP2013005717A (en) | 2013-01-07 |
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