CN101860266B - Photovoltaic inverter power saving control system and method - Google Patents
Photovoltaic inverter power saving control system and method Download PDFInfo
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- CN101860266B CN101860266B CN2010101441840A CN201010144184A CN101860266B CN 101860266 B CN101860266 B CN 101860266B CN 2010101441840 A CN2010101441840 A CN 2010101441840A CN 201010144184 A CN201010144184 A CN 201010144184A CN 101860266 B CN101860266 B CN 101860266B
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Abstract
The invention relates to a photovoltaic inverter power saving control system and a method. The system comprises a solar panel, power modules and a controller; the controller comprises a power port, a detection circuit, a micro-processing module and a drive circuit; the detection circuit is connected with the solar panel and the power modules and is used for detecting the port voltage of the solar panel, light intensity and the output power of the power modules; the micro-processing module is connected with the detection circuit and can generate control signals for controlling the power modules to turn on in the morning or turn off in the evening according to the port voltage of the solar panel, the light intensity and the output power of the power modules; and the drive circuit is connected with the micro-processing module and is used for latching and transmitting the control signals for controlling the power modules to turn on or turn off to the power modules. Since the invention can control a photovoltaic inverter to turn on in the morning and turn off in the evening, the power consumption of the photovoltaic inverter in the standby state can be reduced, each power module of the photovoltaic inverter can rest at night, and thereby the service life of the photovoltaic inverter can be prolonged.
Description
Technical field
The present invention relates to inverter, relate in particular to a kind of photovoltaic inverter power saving control system and method.
Background technology
Photovoltaic DC-to-AC converter market is very strict to the requirement of inverter stand-by power consumption in evening, and along with improving constantly of energy-conservation requirement, stand-by power consumption requires more and more lower.At present, intelligent modularized photovoltaic DC-to-AC converter produce market is less, disperses technology in parallel owing to adopt modularization photovoltaic inverter to adopt, thus night power saving scheme quality be to weigh an important indicator of inverter.
The technology that existing power-saving method adopts electronic switch to turn-off mostly, though energy-saving effect is arranged, still, evening, accessory power supply still had no-load running, still can consume certain energy.
Summary of the invention
The technical problem to be solved in the present invention is, for the defects of prior art, provides a kind of photovoltaic DC-to-AC converter of controlling in photovoltaic inverter power saving control system and the method for automatically economizing on electricity at night.
The technical solution adopted for the present invention to solve the technical problems is:
Construct a kind of photovoltaic inverter power saving control system, comprise solar panels and power model, wherein, also comprise control device, described control device comprises power interface, also comprises:
Connect described solar panels and power model, for detection of described solar panels port voltage and intensity of illumination and detect the testing circuit of the power output of described power model;
Connect described testing circuit, produce the micro treatment module of the control signal that the described power model of control opens in the morning or close at night according to the power output of described solar panels port voltage, intensity of illumination and described power model;
Connect described micro treatment module, latch and be sent to the drive circuit of described power model for the control signal that will control described power model unlatching or close.
Photovoltaic inverter power saving control system of the present invention, wherein, described micro treatment module comprises:
When described solar panels port voltage reaches second voltage threshold value or illumination intensity value and reaches the second illumination threshold value, open the unit morning of the upper electric control signal that the described power model of output control starts; And,
When the power output that is lower than the first voltage threshold and described power model at described solar panels port voltage is lower than system loss, or when the power output that illumination intensity value is lower than the first illumination threshold value and described power model is lower than system loss, the closing unit at night of the pass electric control signal that the described power model of output control is closed.
Photovoltaic inverter power saving control system of the present invention, wherein, described power interface is connected to AC power, is provided with control switch at the line of power interface and AC power, is connected with the controller that opens and closes be used to controlling described control switch on the described control switch.
Photovoltaic inverter power saving control system of the present invention, wherein, described controller is for adopting the manual controller of manually controlling or adopting timer-operated timing switch.
Photovoltaic inverter power saving control system of the present invention, wherein, described controller is connected to described solar panels, and when described solar panels port voltage reaches the electric power starting threshold value, controls described control switch and connect.
The present invention also provides a kind of photovoltaic inverter power saving control method, and it may further comprise the steps:
A, detection intensity of illumination, solar panels port voltage and power model power output;
B, the upper electric control signal that starts according to the described power model of described solar panels port voltage and described intensity of illumination output control;
C, the pass electric control signal of closing according to the power output of described solar panels port voltage, described power model and the described power model of described illumination intensity value output control;
D, according to described upper electric control signal or close electric control signal and control described power model and open or close.
Photovoltaic inverter power saving control method of the present invention, wherein, among the described step B, when described solar panels port voltage reaches second voltage threshold value or illumination intensity value and reaches the second illumination threshold value, the upper electric control signal that the described power model of output control starts.
Photovoltaic inverter power saving control method of the present invention, wherein, described step C comprises,
The system loss value is set, when the power output that is lower than the first voltage threshold and described power model at described solar panels port voltage is lower than system loss, the pass electric control signal that the described power model of output control is closed.
Photovoltaic inverter power saving control method of the present invention, wherein, when described step C also is included in power output that described illumination intensity value is lower than the first illumination threshold value and described power model and is lower than system loss, the pass electric control signal that the described power model of output control is closed.
Photovoltaic inverter power saving control method of the present invention wherein, also comprises step before the described step D:
D0, the time-delay first scheduled time after, repeated execution of steps B and step C;
Described step D comprises: at upper electric control signal with close electric control signal still effectively the time, according to corresponding upper electric control signal or close electric control signal and control described power model and open or close.
Photovoltaic inverter power saving control system of the present invention and method can characterize the signal that sooner or later alternately changes by automatically detecting, the control photovoltaic DC-to-AC converter starts in the morning to be operated in and quits work at dusk, saved the working power of photovoltaic DC-to-AC converter, each power model that also can guarantee photovoltaic DC-to-AC converter can in night's rest, be beneficial to the useful life that prolongs photovoltaic DC-to-AC converter.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the photovoltaic inverter power saving control device theory diagram of the embodiment of the invention;
Fig. 2 is photovoltaic inverter power saving control method energy-saving mode at the night control flow chart of the embodiment of the invention;
Fig. 3 is photovoltaic inverter power saving control method power on mode in the morning control flow chart of the embodiment of the invention.
Embodiment
Below in conjunction with diagram, the preferred embodiments of the present invention are described in detail.
The photovoltaic inverter power saving control system theory diagram of preferred embodiment of the present invention as shown in Figure 1, comprise be used to the solar panels 40 that convert solar energy into Voltage-output with for the power model 10 of exporting electric energy, also comprise a control device 20, control device 20 comprises power interface 21, testing circuit 22, micro treatment module 23 and drive circuit 24.
Wherein, power interface 21 connects AC power 31; Testing circuit 21 connects solar panels 40 and power model 10, for detection of solar panels 40 port voltages and intensity of illumination, and the power output of detection power module 10.Micro treatment module 23 connection detection circuit 22 produce the control signal that power ratio control module 10 is opened or closed at night in the morning according to the power output of solar panels 40 port voltages, intensity of illumination and power model 10.Drive circuit 24 connects micro treatment modules 23, and the control signal that power ratio control module 10 is opened or closed latchs and be sent to the various piece of power model 10, comprises accessory power supply, radiating module fan and display power supply lamp etc.Power model 10 can have a plurality of, and unified the driving by drive circuit controlled, and shown in Fig. 1 is 3.The control signal of general output is digital signal, is sent to one by one each power model that need to control 10 after drive circuit 24 latchs.
Originally be embodiment photovoltaic inverter power saving control system according to the power output of solar panels 40 port voltages, intensity of illumination and power model 10 comprehensively judge photovoltaic DC-to-AC converter be in night energy-saving mode or morning power on mode, each power model 10 each physical switch that produces control command control photovoltaic DC-to-AC converter disconnect or unlatching, make each power model 10 control circuit dead electricity or power on realization power model economize on electricity at 10 nights zero power consumption.
Wherein, micro treatment module 23 produces control or the computational logic of the control signal of opening morning or closing at night and can set according to different needs, such as the unlatching of independent setting solar panels 40 port voltages or close threshold value, set the unlatching of intensity of illumination or close threshold value etc.And the power output of power model 10 is mainly used in judging the control signal that produces when shutting down at dusk.
Preferably, micro treatment module 23 comprise open morning the unit and night closing unit.At dusk, when intensity of illumination dies down, when the power output that night, closing unit was lower than the first voltage threshold and power model 10 at solar panels 40 port voltages is lower than system loss, the pass electric control signal that output power ratio control module 10 is closed, when the power output that perhaps is lower than the first illumination threshold value and power model 10 at illumination intensity value is lower than system loss, the pass electric control signal that output power ratio control module 10 is closed, close the accessory power supply, each heat-sink unit fan, display power supply lamp of each power model 10 etc., realize power model economize on electricity at 10 nights zero power consumption.
Wherein system loss is the overall loss value that photovoltaic inverting system needs normal operation, and the power output of power model is the total power outputs of all power models.The electric energy that produces when photovoltaic inverting system then is the state that is in power consumption during less than its system loss, therefore also needs to close each power model.
When illumination grow in the morning, the power supply of control device 20 powers on automatically, control device for opening 20, when solar panels 40 port voltages reach second voltage threshold value or illumination intensity value and reach the second illumination threshold value, open the upper electric control signal that unit output power ratio control module 10 starts morning, the accessory power supply, each heat-sink unit fan, display power supply lamp of each power model 10 etc. opened in control, makes the photovoltaic DC-to-AC converter can normal power generation.
Preferably, be provided with control switch 30 at the line of power interface 21 and AC power 31, be connected with the controller 32 that opens and closes for control control switch 30 on the control switch 30.Controller 32 can be to adopt the manually manual controller of control, or adopts timer-operated timing switch.Timer regularly the shut-in time arrive, when perhaps Artificial Control disconnects control switch and disconnects so that control device 20 also dead electricity close, further save power supply.
Perhaps controller 32 is connected to solar panels 40, when solar panels 40 port voltages reached the electric power starting threshold value of control device 20, control control switch 30 was connected; In controller 32 interior setting tertiary voltage threshold values, and the tertiary voltage threshold value is less than the first voltage threshold, and during less than the tertiary voltage threshold value, control control switch 30 disconnects, and control device 20 is quit work at solar panels 40 port voltages.
In conjunction with the photovoltaic inverter power saving control system described in the embodiment of front, the present invention also provides a kind of photovoltaic inverter power saving control method, and it may further comprise the steps:
S101, detection intensity of illumination, solar panels port voltage and power model power output;
Wherein intensity of illumination can adopt transducer to detect, and the solar panels port voltage detects from the solar panels port;
S102, judgement detect intensity of illumination, whether the solar panels port voltage satisfies the mode of operation of starting shooting morning, as satisfying, according to the upper electric control signal of solar panels port voltage and the startup in morning of intensity of illumination output power ratio control module;
In the time of can being set in the solar panels port voltage and reaching certain voltage value or illumination intensity value and reach the some strength value, the upper electric control signal that output power ratio control module starts; Also can be set in the solar panels port voltage and reach when the certain voltage value while, illumination intensity value reached the some strength value, the upper electric control signal that output power ratio control module starts;
S103, judgement detect intensity of illumination, solar panels port voltage and power model power output and whether satisfy power saving operation pattern at night, as satisfying, the pass electric control signal of closing evening according to the power output of solar panels port voltage, power model and illumination intensity value output power ratio control module;
Can set when the power output of solar panels port voltage, power model and illumination intensity value are lower than respective threshold simultaneously the pass electric control signal that output power ratio control module is closed evening;
The power output that also can set when solar panels port voltage and power model is lower than respective threshold simultaneously, when perhaps the power output of intensity of illumination and power model is lower than respective threshold simultaneously, and the pass electric control signal that output power ratio control module is closed evening.
S104, open or close according to upper electric control signal or pass electric control signal power ratio control module.Produce upper electric control signal among the step S103 and then control the accessory power supply of opening each power model, each heat-sink unit fan, display power supply lamp etc., make the photovoltaic DC-to-AC converter can normal power generation;
When producing the pass electric control signal, each physical switch of each power model of control photovoltaic DC-to-AC converter disconnects, and each power model control circuit dead electricity realizes the zero power consumption of power model economize on electricity at night.
Wherein, control or the computational logic of the control signal of opening morning or closing at night can be set according to different needs, such as the unlatching of independent setting solar panels port voltage or close threshold value, set the unlatching of intensity of illumination or close threshold value etc.And the power output of power model is mainly used in judging the control signal that produces when shutting down at dusk.
Preferably, in step S102, when the solar panels port voltage reaches second voltage threshold value or illumination intensity value and reaches the second illumination threshold value, the upper electric control signal that output power ratio control module starts.
Preferably, step S103 comprises, the system loss value is set, when the power output that is lower than the first voltage threshold and power model at the solar panels port voltage is lower than system loss, and the pass electric control signal that output power ratio control module is closed; When the power output that perhaps is lower than the first illumination threshold value and power model at illumination intensity value is lower than system loss, the pass electric control signal that output power ratio control module is closed.
Wherein, system loss is the overall loss values that photovoltaic inverting system needs normal operation, and the electric energy that produces when photovoltaic inverting system then is the state that is in power consumption during less than its system loss, therefore also needs to close each power model.The power output of power model is the total power outputs of all power models.
In the above step, step S102 and S103 can be understood as two steps arranged side by side, and without execution sequence successively, and judged result also only may export a control signal, so separately represented this two processes in flow chart 2 and 3.
Preferably, also comprise step: S1040 before the step S104, after first scheduled time of time-delay, repeated execution of steps S102 and step S103;
Step S104 also comprises, at upper electric control signal or close electric control signal still effectively the time, according to corresponding upper electric control signal or close electric control signal power ratio control module and open or close.
This first scheduled time can be set as required, as be set as 1 minute, namely continue to detect and judge 1 minute, if still satisfy night energy-saving mode or morning open mode, namely go up electric control signal or close electric control signal still effective, then carry out the operation of closing each power model or opening each power model.
Can confirm the detection judged result of control device like this, avoid the control device misoperation, so that photovoltaic DC-to-AC converter is repeatedly opened or closed.
Need to prove, more than among each embodiment the physical switch of power model can be normally closed, also can be often to open, can be serially connected in the control power supply, also can be serially connected in the general supply power taking circuit; The control device that produces control signal can be central control device, also can be distributed control apparatus; And control signal described above can be wire signal, also can be wireless signal, can transmit by various communications protocols, also can transmit by analog line.
Photovoltaic inverter power saving control system of the present invention and method can characterize the signal that sooner or later alternately changes by automatically detecting, the control photovoltaic DC-to-AC converter starts in the morning to be operated in and quits work at dusk, saved the working power of photovoltaic DC-to-AC converter, each power model that also can guarantee photovoltaic DC-to-AC converter can in night's rest, be beneficial to the useful life that prolongs photovoltaic DC-to-AC converter.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection range of claims of the present invention.
Claims (4)
1. photovoltaic inverter power saving control system, comprise solar panels (40) and power model (10), it is characterized in that, also comprise a control device (20), described control device (20) comprises power interface (21), described power interface (21) is connected to AC power (31), line in power interface (21) and AC power (31) is provided with control switch (30), be connected with the controller (32) that opens and closes be used to controlling described control switch (30) on the described control switch (30), described controller (32) is connected to described solar panels (40), and when described solar panels (40) port voltage reaches the electric power starting threshold value, control described control switch (30) and connect, described control device (20) also comprises:
Connect described solar panels (40) and power model (10), for detection of described solar panels (40) port voltage and intensity of illumination and detect the testing circuit (22) of the power output of described power model (10);
Connect described testing circuit (22), produce the micro treatment module (23) of the control signal that the described power model of control (10) opens in the morning or close at night according to the power output of described solar panels (40) port voltage, intensity of illumination and described power model (10);
Connect described micro treatment module (23), be used for controlling the drive circuit (24) that control signal that described power model (10) opens or close latched and be sent to described power model (10), described micro treatment module (23) comprising:
When described solar panels (40) port voltage reaches second voltage threshold value or illumination intensity value and reaches the second illumination threshold value, open the unit morning of the upper electric control signal that the output described power model of control (10) starts; And,
When the power output that is lower than the first voltage threshold and described power model (10) at described solar panels (40) port voltage is lower than system loss, or when the power output that illumination intensity value is lower than the first illumination threshold value and described power model (10) is lower than system loss, the closing unit at night of the pass electric control signal that the output described power model of control (10) is closed.
2. photovoltaic inverter power saving control system according to claim 1 is characterized in that, described controller (32) is for adopting the manual controller of manually controlling or adopting timer-operated timing switch.
3. the photovoltaic inverter power saving control method based on photovoltaic inverter power saving control system claimed in claim 1 is characterized in that, may further comprise the steps:
A, detection intensity of illumination, solar panels port voltage and power model power output;
B, the upper electric control signal that starts according to the described power model of described solar panels port voltage and described intensity of illumination output control;
C, the pass electric control signal of closing according to the power output of described solar panels port voltage, described power model and the described power model of described illumination intensity value output control;
D, according to described upper electric control signal or close electric control signal and control described power model and open or close;
Wherein, among the described step B, when described solar panels port voltage reaches second voltage threshold value or illumination intensity value and reaches the second illumination threshold value, the upper electric control signal that the described power model of output control starts;
Described step C comprises,
The system loss value is set, when the power output that is lower than the first voltage threshold and described power model at described solar panels port voltage is lower than system loss, the pass electric control signal that the described power model of output control is closed; Or
When the power output that is lower than the first illumination threshold value and described power model at described illumination intensity value is lower than system loss, the pass electric control signal that the described power model of output control is closed.
4. photovoltaic inverter power saving control method according to claim 3 is characterized in that, also comprises step before the described step D:
D0, the time-delay first scheduled time after, repeated execution of steps B and step C;
Described step D comprises: at upper electric control signal with close electric control signal still effectively the time, according to corresponding upper electric control signal or close electric control signal and control described power model and open or close.
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| CN102253278B (en) * | 2011-04-25 | 2014-01-15 | 上海正泰电源系统有限公司 | Startup condition detection method suitable for photovoltaic inverter with DC/DC (direct current/direct current) |
| WO2012163398A1 (en) | 2011-05-30 | 2012-12-06 | Abb Research Ltd | System for distributing electric power to an electrical grid |
| CN102315764A (en) * | 2011-09-16 | 2012-01-11 | 深圳创动科技有限公司 | Control method for auxiliary power supply of photovoltaic inverter and device |
| CN102437591A (en) * | 2011-12-27 | 2012-05-02 | 东莞市凯登能源科技有限公司 | Method and system for automatically sensing sunlight of grid-connected inverter |
| CN102624086A (en) * | 2012-03-28 | 2012-08-01 | 广东易事特电源股份有限公司 | Night-off type alternating-current power grid power-taking photovoltaic inverter |
| CN104253530B (en) * | 2013-06-27 | 2017-04-05 | 比亚迪股份有限公司 | Photovoltaic DC-to-AC converter and its control method and photovoltaic generating system |
| CN104090501B (en) * | 2014-07-29 | 2017-01-18 | 阳光电源股份有限公司 | Standby control method and device for photovoltaic inverter and controller |
| CN107134917A (en) * | 2016-02-29 | 2017-09-05 | 中兴通讯股份有限公司 | A kind of inverter control method, device and electricity generation system |
| CN106059280B (en) * | 2016-08-08 | 2019-04-09 | 阳光电源股份有限公司 | A kind of auxiliary power supply of photovoltaic inverter and start-up and shut-down control method |
| CN108667134A (en) * | 2017-03-29 | 2018-10-16 | 中兴通讯股份有限公司 | A kind of power supply circuit and method |
| CN107401335A (en) * | 2017-09-01 | 2017-11-28 | 东峡大通（北京）管理咨询有限公司 | A kind of smart lock, car and solar panel power supply state detection method |
| CN109802556B (en) * | 2017-11-17 | 2021-01-26 | 丰郅(上海)新能源科技有限公司 | Photovoltaic power generation system with photovoltaic inverter and starting method of inverter |
| CN110780694B (en) * | 2019-11-30 | 2021-08-20 | 宁波大龙农业科技有限公司 | Automatic control system for greenhouse illumination |
| CN114614663A (en) | 2020-12-03 | 2022-06-10 | 台达电子企业管理（上海）有限公司 | Control method, auxiliary power supply of photovoltaic inverter and photovoltaic power generation system |
| CN112803741A (en) * | 2020-12-31 | 2021-05-14 | 航天柏克(广东)科技有限公司 | Automatic start-stop control method and circuit for photovoltaic system inverter |
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Effective date of registration: 20220128 Address after: 710000 room 804, 8th floor, building 14, West Yungu phase I, Fengxi new town, Xixian new area, Xi'an, Shaanxi Patentee after: Weidi new energy Co.,Ltd. Address before: 518055 1-4, 6-10 floor, B2 building, Nanshan Zhiyuan, 1001 Nanshan District Xue Yuan Avenue, Shenzhen, Guangdong. Patentee before: VERTIV TECH Co.,Ltd. |