CN202513587U - Grid-connected inverter power supply and countercurrent prevention system - Google Patents
Grid-connected inverter power supply and countercurrent prevention system Download PDFInfo
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- CN202513587U CN202513587U CN2012200748574U CN201220074857U CN202513587U CN 202513587 U CN202513587 U CN 202513587U CN 2012200748574 U CN2012200748574 U CN 2012200748574U CN 201220074857 U CN201220074857 U CN 201220074857U CN 202513587 U CN202513587 U CN 202513587U
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- power supply
- adverse current
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- parallel network
- reverse power
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Abstract
The utility model specifically relates to a grid-connected inverter power supply with a countercurrent prevention protection function and a countercurrent prevention system thereof. The grid-connected inverter power supply provided by the utility model comprises an inverter control module and a countercurrent prevention control module. The countercurrent prevention system comprises the above grid-connected inverter power supply, wherein the grid-connected inverter power supply and a power grid are separately connected with local load. The countercurrent prevention system further comprises a detection device, wherein the detection device is arranged at a power grid access point to detect electrical parameters of the power grid access point and to carry out transportation to the countercurrent prevention control module of the grid-connected inverter power supply. The countercurrent prevention control module judges countercurrent and controls the output power of the grid-connected inverter power supply to prevent countercurrent. According to the utility model, the countercurrent prevention function is integrated into the grid-connected inverter power supply; the reverse power condition of the power grid access point is detected through the grid-connected inverter power supply; the grid-connected inverter power supply is directly controlled and adjusted; the complexity of the countercurrent prevention system is reduced; and the system has the advantages of high integration degree, rapid adjustment, high reliability and cost saving.
Description
Technical field
The utility model belongs to the distributed power generation field, is specifically related to a kind of parallel network reverse power supply and anti-contracurrent system with anti-reverse current protection function.
Background technology
At present to grid-connected photovoltaic system, it is can not the adverse current electricity generation system that grid company requires photovoltaic parallel in system usually, and promptly the photovoltaic parallel in system electricity is by local load consumption, do not flow into electrical network cause electrical network unstable with produce harmonic wave.
Existing anti-contracurrent system generally comprises anti-adverse current controller, user load, AC power distribution cabinet/AC distribution panel, grid-connected power supply; Anti-adverse current controller is according to adverse current situation control AC power distribution cabinet/AC distribution panel and the output of grid-connected power supply.The special-purpose anti-adverse current controller of employing carries out system to be regulated, controls, and system is a tandem system, and anti-adverse current regulations speed is slow, and reliability is low, may cause the perhaps anti-less adverse current of energy output to lose efficacy, and adopt special anti-adverse current controller cost also than higher.
The utility model content
For addressing the above problem, the utility model provides a kind of parallel network reverse power supply with anti-reverse current protection function, and comprises the anti-contracurrent system of this parallel network reverse power supply, and the anti-adverse current governing speed of said anti-contracurrent system is fast, reliability is high, cost is low.
For realizing above-mentioned purpose, the utility model provides a kind of parallel network reverse power supply, comprises the inversion control module, also comprises anti-adverse current control module.
Described anti-adverse current control module comprises the inverse probability detection module that detects the inverse probability signal.
Further, described anti-adverse current control module also comprises the inverse probability control module of judging inverse probability a situation arises and the parallel network reverse power supply carried out regulating and controlling according to the inverse probability signal.
Further, said anti-adverse current control module is according to the open and close machine and the power grade of inverse probability a situation arises control parallel network reverse power supply.
The utility model also provides a kind of anti-contracurrent system; Said anti-contracurrent system comprises above-mentioned parallel network reverse power supply; Said parallel network reverse power supply links to each other with local load respectively with electrical network; Also comprise checkout gear, said checkout gear is arranged at the anti-adverse current control module that electrical network access point place detection of grid access point electric parameter flows to the parallel network reverse power supply, and the power output that anti-adverse current control module is judged adverse current and controlled the parallel network reverse power supply prevents adverse current.
Further; Said anti-contracurrent system also comprises other parallel network reverse power supplys; Said other parallel network reverse power supplys link to each other with the anti-adverse current control module of local load and parallel network reverse power supply respectively, and the power output of anti-adverse current control module control parallel network reverse power supply and other parallel network reverse power supplys prevents adverse current.
Further, said anti-contracurrent system also comprises tunable load, and the power output of said anti-adverse current control module regulating and controlling parallel network reverse power supply and the consumed power of tunable load prevent adverse current.
Further, said anti-contracurrent system also comprises energy-storage system, and the power output and the discharging and recharging of energy-storage system of said anti-adverse current control module regulating and controlling parallel network reverse power supply prevent adverse current.
Further, described anti-adverse current control module and tunable load are through RS485 or CAN bus or power line carrier, PLC.
Further, said anti-adverse current control module is through contact point signal control other parallel network reverse power supply and energy-storage systems.
Can know by technique scheme; The utility model will be prevented that the adverse current function is integrated and advance in the parallel network reverse power supply; Inverse probability situation through parallel network reverse power supply detection of grid access point; And direct regulating and controlling parallel network reverse power supply, having reduced the complexity of anti-contracurrent system, level of integrated system is high, governing speed is fast, reliability is high, save cost.
Description of drawings
Fig. 1 is the connection sketch map of an embodiment of the parallel network reverse power supply of the utility model;
Fig. 2 is the connection sketch map of an embodiment of the anti-contracurrent system of the utility model;
Fig. 3 is the connection sketch map of an embodiment of the anti-contracurrent system of the utility model;
Fig. 4 is the connection sketch map of an embodiment of the anti-contracurrent system of the utility model;
Fig. 5 is the connection sketch map of an embodiment of the anti-contracurrent system of the utility model;
Fig. 6 is that the parallel network reverse power supply of the utility model is connected sketch map with anti-contracurrent system.
Embodiment
As shown in Figure 1, the parallel network reverse power supply of the utility model comprises inversion control module 20 and anti-adverse current control module 10.Described anti-adverse current control module 10 comprises the inverse probability detection module 11 that detects the inverse probability signal.Inverse probability detection module 11 detects the inverse probability signal and is transferred to inversion control module 20, and inversion control module 20 is judged inverse probability, and a situation arises and the parallel network reverse power supply is carried out regulating and controlling.The regulating and controlling function is incorporated in the inversion control module 20, has avoided the communication between two controllers, speed is faster, reliability is higher, and saves cost.
Further, described anti-adverse current control module 10 also comprises the inverse probability control module 12 of judging inverse probability a situation arises and the parallel network reverse power supply carried out regulating and controlling according to the inverse probability signal.Inverse probability regulating and controlling function is accomplished by independent inverse probability regulating and controlling module, through the open and close machine and the power grade of contact point signal or Control on Communication parallel network reverse power supply.
As shown in Figure 2; The anti-contracurrent system that the utility model provides comprises above-mentioned parallel network reverse power supply 1; Said parallel network reverse power supply 1 links to each other with local load 4 respectively with electrical network 3; Also comprise checkout gear 2, said checkout gear 2 is arranged at the anti-adverse current control module 10 that electrical network 3 access point place detection of grid access point electric parameters flow to parallel network reverse power supply 1, and anti-adverse current control module 10 judges that the power output of adverse current and regulating and controlling parallel network reverse power supply 1 prevents adverse current.The position of electrical network access point is referring to Fig. 2.
Further; As shown in Figure 3; Said anti-contracurrent system also comprises some other parallel network reverse power supplys 5; Said other parallel network reverse power supplys 5 link to each other with the anti-adverse current control module 10 of local load 4 and parallel network reverse power supply 1 respectively, and the power output of anti-adverse current control module 10 regulating and controlling parallel network reverse power supplys 1 and other parallel network reverse power supplys 5 prevents adverse current.
Further, as shown in Figure 4, said anti-contracurrent system also comprises tunable load 6, and the power output of said anti-adverse current control module 10 regulating and controlling parallel network reverse power supplys and the consumed power of tunable load 6 prevent adverse current.
Further, as shown in Figure 5, said anti-contracurrent system also comprises energy-storage system 7, and the power output and the discharging and recharging of energy-storage system 7 of said anti-adverse current control module 10 regulating and controlling parallel network reverse power supplys prevent adverse current.
Concrete, as shown in Figure 6, the output of the input termination detecting device 2 of said inverse probability testing circuit 11, said other parallel network reverse power supplys 5, tunable load 6 and energy-storage system 7 link to each other with the inverse probability regulating circuit of anti-adverse current control module 10.
Further, described anti-adverse current control module 10 is passed through RS485 or CAN bus or power line carrier, PLC with tunable load 6.
Further, said anti-adverse current control module 10 is through contact point signal control other parallel network reverse power supplys 5 and energy-storage system 7.
The control principle of the utility model is: P
Local load+ P
Tunable load+ P
Energy storage(can be positive and negative)-P
Send out=P
1(electrical network access point power).When electrical network access point power P
1Set threshold values P less than predefined adverse current
0The time, adverse current takes place, need heighten P
Tunable load+ P
Energy storage(can be positive and negative)-P
Send outValue; When electrical network access point power P
1Set threshold values P greater than predefined adverse current
0The time, this moment, the power output of parallel network reverse power supply was low excessively, can not satisfy the needs of local load, need need heighten P from the electrical network power taking
Tunable load+ P
Energy storage(can be positive and negative)-P
Send outValue.
The voltage and current of checkout gear 2 detection of grid access points is also exported to anti-adverse current control module 10, and anti-adverse current control module 10 is calculated the power P that tunable load 6 should consume under the adverse current situation is not taken place
Tunable loadIf the bearing power that can supply regulate is not enough, also need calculate the maximum power P that grid-connected power supply can be exported
Send out, anti-then adverse current control module 10 is regulated tunable load 6 consumed power P
Tunable load, and the output of adjusting parallel network reverse power supply is no more than P
Send outPower.When local load 4 variable power, adjustment output in time prevents adverse current to anti-adverse current control module 10 control tunable loads 6 with parallel network reverse power supply 1.When becoming big with local load 4 power, anti-adverse current control module 10 is transferred big parallel network reverse power supply 1 exportable maximum power, if parallel network reverse power supply 1 exportable maximum power has reached maximum (P
Send out), then turn the consumed power of tunable load 6 down; When local load 4 power diminished, the consumed power that anti-adverse current control module 10 is transferred big tunable load 6 if the consumed power of tunable load 6 has reached maximum, was then turned parallel network reverse power supply 1 exportable maximum power down.The regulating and controlling process makes this electricity generation system utilance maximization.Be furnished with energy-storage system, prevent that when parallel network reverse power supply 1 power output is not enough adverse current control module 10 control energy-storage systems 7 become discharge mode by charge mode and supply power to user load.
Claims (10)
1. a parallel network reverse power supply comprises inversion control module (20), it is characterized in that: also comprise anti-adverse current control module (10).
2. parallel network reverse power supply according to claim 1 is characterized in that: described anti-adverse current control module (10) comprises the inverse probability detection module (11) that detects the inverse probability signal.
3. parallel network reverse power supply according to claim 2 is characterized in that: described anti-adverse current control module (10) also comprises the inverse probability control module (12) of judging inverse probability a situation arises and the parallel network reverse power supply carried out regulating and controlling according to the inverse probability signal.
4. parallel network reverse power supply according to claim 1 is characterized in that: said anti-adverse current control module (10) is according to the open and close machine and the power grade of inverse probability a situation arises control parallel network reverse power supply.
5. anti-contracurrent system; It is characterized in that: any described parallel network reverse power supply (1) that comprises claim 1 to 4; Said parallel network reverse power supply (1) links to each other with local load (4) respectively with electrical network (3); Also comprise checkout gear (2); Said checkout gear (2) is arranged at the anti-adverse current control module (10) that electrical network (3) access point place detection of grid access point electric parameter flows to parallel network reverse power supply (1), and anti-adverse current control module (10) judges that the power output of adverse current and regulating and controlling parallel network reverse power supply (1) prevents adverse current.
6. anti-contracurrent system according to claim 5; It is characterized in that: said anti-contracurrent system also comprises several other parallel network reverse power supplys (5); Said other parallel network reverse power supplys (5) link to each other with the anti-adverse current control module (10) of local load (4) and parallel network reverse power supply (1) respectively, and the power output of anti-adverse current control module (10) regulating and controlling parallel network reverse power supply (1) and other parallel network reverse power supplys (5) prevents adverse current.
7. according to claim 5 or 6 described anti-contracurrent systems; It is characterized in that: said anti-contracurrent system also comprises tunable load (6), and the power output of said anti-adverse current control module (10) regulating and controlling parallel network reverse power supply and the consumed power of tunable load (6) prevent adverse current.
8. anti-contracurrent system according to claim 5; It is characterized in that: said anti-contracurrent system also comprises energy-storage system (7), and the power output of said anti-adverse current control module (10) regulating and controlling parallel network reverse power supply and the charge and discharge of energy-storage system (7) prevent adverse current.
9. anti-contracurrent system according to claim 7 is characterized in that: described anti-adverse current control module (10) is passed through RS485 or CAN bus or power line carrier, PLC with tunable load (6).
10. anti-contracurrent system according to claim 8 is characterized in that: said anti-adverse current control module (10) is through contact point signal other parallel network reverse power supplys (5) of control and energy-storage system (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200748574U CN202513587U (en) | 2012-03-02 | 2012-03-02 | Grid-connected inverter power supply and countercurrent prevention system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200748574U CN202513587U (en) | 2012-03-02 | 2012-03-02 | Grid-connected inverter power supply and countercurrent prevention system |
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| Publication Number | Publication Date |
|---|---|
| CN202513587U true CN202513587U (en) | 2012-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200748574U Expired - Lifetime CN202513587U (en) | 2012-03-02 | 2012-03-02 | Grid-connected inverter power supply and countercurrent prevention system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103269084A (en) * | 2013-03-28 | 2013-08-28 | 上海空间电源研究所 | Anti-reflux control device and photovoltaic energy storage connecting grid power generation method thereof |
| CN103346587A (en) * | 2013-07-09 | 2013-10-09 | 京东方科技集团股份有限公司 | Anti-countercurrent grid-connected photovoltaic power generation system |
| CN104104115A (en) * | 2013-04-01 | 2014-10-15 | 北京格林科电技术有限公司 | Multichannel high-accuracy reverse power control system and reverse power protection control method |
| CN107947230A (en) * | 2017-12-01 | 2018-04-20 | 阳光电源股份有限公司 | A kind of Countercurrent prevention control method of photovoltaic generating system, apparatus and system |
| CN110445169A (en) * | 2019-07-13 | 2019-11-12 | 深圳市禾望科技有限公司 | From grid-connected photovoltaic energy-storage system and its control method |
-
2012
- 2012-03-02 CN CN2012200748574U patent/CN202513587U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103269084A (en) * | 2013-03-28 | 2013-08-28 | 上海空间电源研究所 | Anti-reflux control device and photovoltaic energy storage connecting grid power generation method thereof |
| CN104104115A (en) * | 2013-04-01 | 2014-10-15 | 北京格林科电技术有限公司 | Multichannel high-accuracy reverse power control system and reverse power protection control method |
| CN103346587A (en) * | 2013-07-09 | 2013-10-09 | 京东方科技集团股份有限公司 | Anti-countercurrent grid-connected photovoltaic power generation system |
| CN103346587B (en) * | 2013-07-09 | 2015-06-03 | 京东方科技集团股份有限公司 | Anti-countercurrent grid-connected photovoltaic power generation system |
| CN107947230A (en) * | 2017-12-01 | 2018-04-20 | 阳光电源股份有限公司 | A kind of Countercurrent prevention control method of photovoltaic generating system, apparatus and system |
| CN107947230B (en) * | 2017-12-01 | 2019-11-29 | 阳光电源股份有限公司 | A kind of Countercurrent prevention control method of photovoltaic generating system, apparatus and system |
| CN110445169A (en) * | 2019-07-13 | 2019-11-12 | 深圳市禾望科技有限公司 | From grid-connected photovoltaic energy-storage system and its control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 230088 Anhui city of Hefei province high tech Zone Xiyou Road No. 1699 Patentee after: Sun Grow Power Co., Ltd. Address before: High tech Zone of Hefei city of Anhui Province in 230088 Lake Road No. 2 Patentee before: Sun Grow Power Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20121031 |
|
| CX01 | Expiry of patent term |