CN202712872U - Grid-connected inverter and backflow prevention and reactive compensation controller and system - Google Patents
Grid-connected inverter and backflow prevention and reactive compensation controller and system Download PDFInfo
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- CN202712872U CN202712872U CN 201220221401 CN201220221401U CN202712872U CN 202712872 U CN202712872 U CN 202712872U CN 201220221401 CN201220221401 CN 201220221401 CN 201220221401 U CN201220221401 U CN 201220221401U CN 202712872 U CN202712872 U CN 202712872U
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Abstract
The utility model relates to a grid-connected inverter with the functions of backflow prevention and reactive compensation, and a backflow prevention and reactive compensation system. The grid-connected inverter provided by the utility model comprises an inverter control module, a detection module which detects the electric parameter of a grid access point and a backflow prevention and reactive compensation controller. The detection module, the backflow prevention and reactive compensation controller and the inverter control module are connected in sequence. The backflow prevention and reactive compensation controller comprises a backflow prevention control module and a reactive compensation control module. The backflow prevention control module is used for determining whether backflow occurs according to a detection result output by the detection module and for controlling the inverter control module to adjust the active power output of the grid-connected inverter. The reactive compensation control module is used for determining whether the power factor of the grid access point is lower than a preset value according to a detection result output by the detection module and for controlling the inverter control module to adjust the reactive power output of the grid-connected inverter. According to the utility model, the integration degree is high; the adjusting speed is fast; and the cost is saved.
Description
Technical field
The utility model belongs to counterflow-preventing, the reactive power compensation technology in the distributed power generation field, relates in particular to a kind of parallel network reverse power supply with counterflow-preventing, no-power compensation function and counterflow-preventing, reactive compensation system.
Background technology
In grid-connected photovoltaic system, for reduce and network source to the negative effect of electric power system, usually requiring photovoltaic parallel in system is can not the adverse current electricity generation system, and namely the photovoltaic parallel in system electricity is by local load consumption, avoids flowing into electrical network and causes electrical network unstable and produce harmonic wave.On the other hand, a lot of load consumption reactive powers in the electric power system if there are a large amount of reactive powers in the supply line, can cause a large amount of energy losses.Can cause electrical network access point active power to reduce behind the photovoltaic generating system access power distribution network, according to power factor
As can be known, in idle constant situation, active power reduces, and can cause power factor to descend.Therefore reactive power compensation is the energy-saving and cost-reducing requisite measure of electric power system, need in electrical network, adopt reactive power compensator to improve the power factor of system, need to carry out extra reactive power compensation after particularly accessing photovoltaic generating system, improve the electrical network quality of power supply, reduce line loss.
Existing countercurrent prevention system generally only has the function of counterflow-preventing, and the user is in order to need to configure special reactive-load compensation equipment to idle compensating.
Existing grid-connected system normally adopts anti-backflow device to prevent adverse current, and reactive power compensator carries out reactive power compensation to electrical network.When adverse current appearred in system, anti-backflow device cut off AC power distribution cabinet/AC distribution panel or closes and network source prevention adverse current; Cross when low when power factor, reactive power compensator carries out reactive power compensation to electrical network.Whole system is tandem system, and complex structure, integrated level is low, reliability is low, cost of investment is high.
The utility model content
For addressing the above problem, the utility model provides a kind of parallel network reverse power supply with counterflow-preventing, no-power compensation function and counterflow-preventing, idle compensating control and counterflow-preventing, reactive compensation system, and this parallel network reverse power supply and counterflow-preventing, reactive compensation system is simple in structure, integrated level is high, reliability is high and save cost.
For achieving the above object, the utility model provides a kind of parallel network reverse power supply, comprise the inversion control module, described parallel network reverse power supply also comprises the detection module of detection of grid access point electric parameter and counterflow-preventing, idle compensating control, described detection module links to each other successively with counterflow-preventing, idle compensating control and inversion control module, and described counterflow-preventing, idle compensating control comprise:
The counterflow-preventing control module judges whether to occur adverse current in order to the testing result according to detection module output, and control inversion control module is adjusted the output of the active power of parallel network reverse power supply;
The control of reactive power compensating module judges in order to the testing result of exporting according to detection module whether the power factor of electrical network access point is lower than preset value, and control inversion control module is adjusted the output of the reactive power of parallel network reverse power supply.
Accordingly, the utility model also provides a kind of counterflow-preventing, reactive compensation system, described system comprises above-mentioned parallel network reverse power supply, described parallel network reverse power supply links to each other with electrical network with local load, also comprise checkout gear, described checkout gear is arranged at the detection module that electrical network access point place detection of grid access point electric parameter flows to the parallel network reverse power supply, detection module sends electrical network access point electric parameter to counterflow-preventing after treatment, idle compensating control, counterflow-preventing, idle compensating control judges whether whether the power factor that adverse current and electrical network access point occur is lower than preset value, thus the active power of control parallel network reverse power supply and the output of reactive power.
The utility model also provides a kind of counterflow-preventing, idle compensating control, the checkout gear of the input termination detection of grid access point electric parameter of described counterflow-preventing, idle compensating control, output termination parallel network reverse power supply, it is characterized in that: described counterflow-preventing, idle compensating control comprise:
The counterflow-preventing control module judge whether to occur adverse current in order to the testing result according to checkout gear output, and the output of the active power of parallel network reverse power supply is adjusted in control;
The control of reactive power compensating module judges in order to the testing result of exporting according to checkout gear whether the power factor of electrical network access point is lower than preset value, and the output of the reactive power of parallel network reverse power supply is adjusted in control.
Accordingly, the utility model also provides a kind of counterflow-preventing, reactive compensation system, described system comprises the parallel network reverse power supply, described parallel network reverse power supply links to each other with electrical network with local load, also comprise checkout gear and above-mentioned counterflow-preventing, idle compensating control, described checkout gear is arranged at electrical network access point place detection of grid access point electric parameter and flows to counterflow-preventing, idle compensating control, described counterflow-preventing, idle compensating control judges whether according to the testing result of checkout gear whether the power factor that adverse current and electrical network access point occur is lower than preset value, thus the active power of control parallel network reverse power supply and the output of reactive power.
As shown from the above technical solution, the parallel network reverse power supply that the utility model provides and counterflow-preventing thereof, reactive compensation system advance in the parallel network reverse power supply counterflow-preventing and no-power compensation function are integrated, reduced the complexity of system, level of integrated system is high, governing speed is fast, reliability is high, save cost.The counterflow-preventing that the utility model provides, idle compensating control and counterflow-preventing thereof, reactive compensation system have been integrated the function of counterflow-preventing and reactive power compensation, for user's regulating and controlling parallel network reverse power supply provides convenience, have reduced the cost of whole system.
Description of drawings
Fig. 1 is the connection diagram of an embodiment of parallel network reverse power supply of the present utility model;
Fig. 2 is the connection diagram of an embodiment of parallel network reverse power supply of the present utility model;
Fig. 3 is the connection diagram of an embodiment of counterflow-preventing of the present utility model, reactive compensation system;
Fig. 4 is the connection diagram of an embodiment of counterflow-preventing of the present utility model, reactive compensation system;
Fig. 5 is the connection diagram of an embodiment of counterflow-preventing of the present utility model, idle compensating control;
Fig. 6 is the connection diagram of an embodiment of counterflow-preventing of the present utility model, idle compensating control;
Fig. 7 is the connection diagram of an embodiment of another counterflow-preventing of the present utility model, reactive compensation system;
Fig. 8 is the connection diagram of an embodiment of another counterflow-preventing of the present utility model, reactive compensation system.
Embodiment
The below elaborates to embodiment of the present utility model; the present embodiment is implemented under take technical solutions of the utility model as prerequisite; provided detailed execution mode and concrete operating process, but protection range of the present utility model is not limited to following embodiment.
As shown in Figure 1, parallel network reverse power supply of the present utility model, comprise inversion control module 13, it is characterized in that: described parallel network reverse power supply also comprises the detection module 11 of detection of grid access point electric parameter and counterflow-preventing, idle compensating control 12, described detection module 11, counterflow-preventing, idle compensating control 12 and inversion control module 13 link to each other successively, and described counterflow-preventing, the control of reactive power compensating 12 comprise:
Counterflow-preventing control module 121 judges whether to occur adverse current in order to the testing result according to detection module 11 outputs, and control inversion control module 13 is adjusted the output of the active power of parallel network reverse power supply;
The control of reactive power compensating module 122 judges in order to the testing result of exporting according to detection module 11 whether the power factor of electrical network access point is lower than preset value, and control inversion control module 13 is adjusted the output of the reactive power of parallel network reverse power supplys.
Advance in the parallel network reverse power supply counterflow-preventing and no-power compensation function are integrated, avoided the communication of counterflow-preventing, idle compensating control and inversion control intermodule, make that control rate is faster, reliability is higher, and save cost.The regulating and controlling function is finished by independent counterflow-preventing, idle compensating control 12, by the meritorious power output of signal controlling parallel network reverse power supply and idle power output.
Further, described counterflow-preventing, idle compensating control 12 also comprise:
Comprehensive Control module 123, in order to adverse current conditioning signal and the reactive power compensation signal that receives counterflow-preventing control module 121 and the control of reactive power compensating module 122, and be adverse current adjusting and reactive power compensation adjusting setting priority, meritorious power output and the idle power output of then controlling inversion control module 13 adjustment parallel network reverse power supplys satisfy the high adjusting requirement of priority.The meritorious conditioning signal of Comprehensive Control module 123 comprehensive judgement counterflow-preventing control modules 121 outputs and the idle conditioning signal of the control of reactive power compensating module 122 outputs, be optimized control, satisfy the preferential or generating priority scheduling control logic of reactive power compensation, make whole system in the situation that reach the multiple electricity of reactive compensation requirements, the output control signal is regulated meritorious power output and the idle power output of parallel network reverse power supply to inversion control module 13.
As shown in Figure 3, counterflow-preventing of the present utility model, reactive compensation system, comprise above-mentioned parallel network reverse power supply 1, described parallel network reverse power supply 1 links to each other with electrical network 4 with local load 3, also comprise checkout gear 2, described checkout gear 2 is arranged at the detection module 11 that electrical network 4 access point place detection of grid access point electric parameters flow to parallel network reverse power supply 1, detection module 11 sends electrical network access point electric parameter to counterflow-preventing after treatment, idle compensating control 12, counterflow-preventing, idle compensating control 12 judges whether whether the power factor that adverse current and electrical network access point occur is lower than preset value, thus the active power of control parallel network reverse power supply 1 and the output of reactive power.The position of electrical network access point is referring to Fig. 3.
Corresponding to parallel network reverse power supply of the present utility model, above-mentioned counterflow-preventing, reactive compensation system have advantages of that equally control rate is fast, reliability is high and cost is low.
Further, as shown in Figure 4, described system also comprises other parallel network reverse power supplys 5, described other parallel network reverse power supplys 5 link to each other with electrical network 4 with local load 3 respectively, described other parallel network reverse power supplys 5 also are connected with counterflow-preventing, idle compensating control 12 communications of parallel network reverse power supply 1, counterflow-preventing, idle compensating control 12 judge whether whether the power factor that adverse current and electrical network access point occur is lower than preset value, thus the active power of Comprehensive Control parallel network reverse power supply 1 and other parallel network reverse power supplys 5 and the output of reactive power.
Further, as shown in Figure 4, described system also comprises reactive power compensator 6, described reactive power compensator 6 links to each other with electrical network 4 with parallel network reverse power supply 1 respectively, described reactive power compensator 6 also is connected with counterflow-preventing, idle compensating control 12 communications of parallel network reverse power supply 1, described counterflow-preventing, idle compensating control 12 judge whether the power factor of electrical network access point is lower than preset value, thereby idle power output and 6 pairs of electrical networks of reactive power compensator 4 of control parallel network reverse power supply 1 carry out reactive power compensation.Integrated the no-power compensation function that reactive compensation module 12 has further improved this system.
Further, as shown in Figure 4, described system also comprises energy-storage system 7, described energy-storage system 7 links to each other with electrical network 4 with parallel network reverse power supply 1 respectively, described energy-storage system 7 also with the counterflow-preventing of parallel network reverse power supply 1, idle compensating control 12 communications connect, described counterflow-preventing, idle compensating control 12 judges whether whether the power factor that adverse current and electrical network access point occur is lower than preset value, thus the meritorious power output of control parallel network reverse power supply 1 and the charging of energy-storage system 7, the non-return stream of discharge-preventing and control parallel network reverse power supply 1 and energy-storage system 7 idle power output electrical network 4 is carried out reactive power compensation.
Such as Fig. 5, shown in Figure 7, the counterflow-preventing that Fig. 5 provides for the utility model, idle compensating control, the checkout gear of the input termination detection of grid access point electric parameter of described counterflow-preventing, idle compensating control, output termination parallel network reverse power supply, described counterflow-preventing, idle compensating control comprise:
Counterflow-preventing control module 201 judge whether to occur adverse current in order to the testing result according to checkout gear output, and the output of the active power of parallel network reverse power supply is adjusted in control;
The control of reactive power compensating module 202 judges in order to the testing result of exporting according to checkout gear whether the power factor of electrical network access point is lower than preset value, and the output of the reactive power of parallel network reverse power supply is adjusted in control.
Above-mentioned counterflow-preventing, idle compensating control have been integrated the function of counterflow-preventing and reactive power compensation, for user's regulating and controlling parallel network reverse power supply provides convenience, have reduced the cost of whole system.
Further, as shown in Figure 6, described counterflow-preventing, idle compensating control also comprise:
Comprehensive Control module 203, in order to receive counterflow-preventing control module 201 and the control of reactive power compensating module 202 adverse current conditioning signal and reactive power compensation signal, and be adverse current adjusting and reactive power compensation adjusting setting priority, then meritorious power output and the idle power output of control adjustment parallel network reverse power supply satisfy the high adjusting requirement of priority.
As shown in Figure 7, another counterflow-preventing of the present utility model, reactive compensation system comprises parallel network reverse power supply 100, described parallel network reverse power supply 100 links to each other with electrical network 400 with local load 300, also comprise checkout gear 500 and above-mentioned counterflow-preventing, idle compensating control 200, described checkout gear 500 is arranged at electrical network 400 access point place detection of grid access point electric parameters and flows to counterflow-preventing, idle compensating control 200, described counterflow-preventing, idle compensating control 200 judges whether according to the testing result of checkout gear 500 whether the power factor that adverse current and electrical network access point occur is lower than preset value, thus the active power of control parallel network reverse power supply and the output of reactive power.Accordingly, above-mentioned counterflow-preventing, reactive compensation system have advantages of that equally integrated level is high, cost is low.
Further, as shown in Figure 8, described system also comprises other parallel network reverse power supplys 600, described other parallel network reverse power supplys 600 link to each other with electrical network 400 with local load 300 respectively, described other parallel network reverse power supplys 600 also are connected with counterflow-preventing, idle compensating control 200 communications, counterflow-preventing, idle compensating control 200 judge whether whether the power factor that adverse current and electrical network access point occur is lower than preset value, thus the active power of Comprehensive Control parallel network reverse power supply 100 and other parallel network reverse power supplys 600 and the output of reactive power.
Further, as shown in Figure 8, described system also comprises reactive power compensator 700, described reactive power compensator 700 links to each other with electrical network 400 with parallel network reverse power supply 100 respectively, described reactive power compensator 700 also is connected with counterflow-preventing, idle compensating control 200 communications, described counterflow-preventing, idle compensating control 200 judge whether the power factor of electrical network access point is lower than preset value, thereby idle power output and 700 pairs of electrical networks of reactive power compensator 400 of control parallel network reverse power supply 100 carry out reactive power compensation.Integrated the no-power compensation function that reactive compensation module 700 has further improved this system.
Further, as shown in Figure 8, described system also comprises energy-storage system 800, described energy-storage system 800 links to each other with electrical network 400 with parallel network reverse power supply 100 respectively, described energy-storage system 800 is gone back and counterflow-preventing, idle compensating control 200 communications connect, described counterflow-preventing, idle compensating control 200 judges whether whether the power factor that adverse current and electrical network access point occur is lower than preset value, thus the meritorious power output of control parallel network reverse power supply 100 and the charging of energy-storage system 800, the non-return stream of discharge-preventing and control parallel network reverse power supply 100 and energy-storage system 800 idle power output electrical network 400 is carried out reactive power compensation.
Preferred version as above-mentioned two kinds of counterflow-preventings, reactive compensation system can comprise other parallel network reverse power supplys, energy-storage system and reactive power compensator simultaneously.Operation principle below in conjunction with description of drawings preferred embodiment of the present utility model.
The principle of counterflow-preventing control is: P
Local load+ P
Energy storage(can be positive and negative)-P
Send out=P
1(electrical network access point power), wherein, P
Send outGenerated output for the parallel network reverse power supply.When electrical network access point power P
1Set threshold values P less than predefined adverse current
0The time, adverse current occurs, need to heighten 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 excessively low, can not satisfy the needs of local load, need to from the electrical network power taking, need to heighten P
Energy storage(can be positive and negative)-P
Send outValue.The principle of the control of reactive power compensating is: Q
Local load+ Q
Reactive power compensator+ Q
Send out+ Q
Energy storage=Q, when electrical network access point power factor COS φ 1 less than predefined regulation power factor COS φ
0The time, power factor is excessively low, (according to
) need to turn down the absolute value of Q, namely turn down Q
Local load+ Q
Reactive power compensator+ Q
Send out+ Q
Energy storageAbsolute value, Q wherein
Send outBe the reactive power of parallel network reverse power supply output, Q
Energy storageReactive power for energy-storage system output.
Counterflow-preventing, idle compensating control calculate in the situation that do not send inverse probability, the maximum power P that the parallel network reverse power supply can be exported to electrical network according to the electric parameter of electrical network access point
Send out, simultaneously calculating reaches the power Q that reactive power compensator should compensate in the requirement power factor situation
Reactive power compensatorIf the idle deficiency that reactive power compensator can compensate also need calculate the reactive power Q that the parallel network reverse power supply need to be exported
Send out, then counterflow-preventing, idle compensating control are regulated reactive power compensator output reactive power Q
Reactive power compensator, and the output of adjusting parallel network reverse power supply is no more than P
Send outActive power and Q
Send outReactive power.When being furnished with energy-storage system, can also control that energy-storage system output is idle carries out reactive power compensation to electrical network; Counterflow-preventing, idle compensating control control energy-storage system become discharge mode to local load supplying by charge mode when parallel network reverse power supply active power of output is not enough.
Claims (9)
1. parallel network reverse power supply, comprise inversion control module (13), it is characterized in that: described parallel network reverse power supply also comprises the detection module (11) of detection of grid access point electric parameter and counterflow-preventing, idle compensating control (12), described detection module (11), counterflow-preventing, idle compensating control (12) and inversion control module (13) link to each other successively, and described counterflow-preventing, idle compensating control (12) comprising:
Counterflow-preventing control module (121) judge whether to occur adverse current in order to the testing result according to detection module (11) output, and control inversion control module (13) is adjusted the output of the active power of parallel network reverse power supply;
The control of reactive power compensating module (122) judges in order to the testing result of exporting according to detection module (11) whether the power factor of electrical network access point is lower than preset value, and control inversion control module (13) is adjusted the output of the reactive power of parallel network reverse power supply.
2. parallel network reverse power supply according to claim 1, it is characterized in that: described counterflow-preventing, idle compensating control (12) also comprise:
Comprehensive Control module (123), in order to receive adverse current conditioning signal and the reactive power compensation signal of counterflow-preventing control module (121) and the control of reactive power compensating module (122), and be adverse current adjusting and reactive power compensation adjusting setting priority, meritorious power output and the idle power output of then controlling inversion control module (13) adjustment parallel network reverse power supply satisfy the high adjusting requirement of priority.
3. counterflow-preventing, reactive compensation system, it is characterized in that: described system comprises claim 1 or 2 described parallel network reverse power supplys (1), described parallel network reverse power supply (1) links to each other with electrical network (4) with local load (3), also comprise checkout gear (2), described checkout gear (2) is arranged at the detection module (11) that electrical network (4) access point place detection of grid access point electric parameter flows to parallel network reverse power supply (1), detection module (11) sends electrical network access point electric parameter to counterflow-preventing after treatment, idle compensating control (12), counterflow-preventing, idle compensating control (12) judges whether whether the power factor that adverse current and electrical network access point occur is lower than preset value, thus the active power of control parallel network reverse power supply (1) and the output of reactive power.
4. a counterflow-preventing, idle compensating control, the checkout gear of the input termination detection of grid access point electric parameter of described counterflow-preventing, idle compensating control, output termination parallel network reverse power supply, it is characterized in that: described counterflow-preventing, idle compensating control comprise:
Counterflow-preventing control module (201) judge whether to occur adverse current in order to the testing result according to checkout gear output, and the output of the active power of parallel network reverse power supply is adjusted in control;
The control of reactive power compensating module (202) judges in order to the testing result of exporting according to checkout gear whether the power factor of electrical network access point is lower than preset value, and the output of the reactive power of parallel network reverse power supply is adjusted in control.
5. counterflow-preventing according to claim 4, idle compensating control is characterized in that: also comprise:
Comprehensive Control module (203), in order to receive adverse current conditioning signal and the reactive power compensation signal of counterflow-preventing control module (201) and the control of reactive power compensating module (202), and be adverse current adjusting and reactive power compensation adjusting setting priority, then meritorious power output and the idle power output of control adjustment parallel network reverse power supply satisfy the high adjusting requirement of priority.
6. counterflow-preventing, reactive compensation system, it is characterized in that: described system comprises parallel network reverse power supply (100), described parallel network reverse power supply (100) links to each other with electrical network (400) with local load (300), also comprise checkout gear (500) and claim 4 or 5 described counterflow-preventings, idle compensating control (200), described checkout gear (500) is arranged at electrical network (400) access point place detection of grid access point electric parameter and flows to counterflow-preventing, idle compensating control (200), described counterflow-preventing, idle compensating control (200) judges whether according to the testing result of checkout gear (500) whether the power factor that adverse current and electrical network access point occur is lower than preset value, thus the active power of control parallel network reverse power supply and the output of reactive power.
7. according to claim 3 or 6 described counterflow-preventings, reactive compensation system, it is characterized in that: described system also comprises other parallel network reverse power supplys, described other parallel network reverse power supplys link to each other with electrical network with local load respectively, described other parallel network reverse power supplys also are connected with counterflow-preventing, idle compensating control communication, counterflow-preventing, idle compensating control judge whether whether the power factor that adverse current and electrical network access point occur is lower than preset value, thus meritorious power output and the idle power output of Comprehensive Control parallel network reverse power supply and other parallel network reverse power supplys.
8. according to claim 3 or 6 described counterflow-preventings, reactive compensation system, it is characterized in that: described system also comprises reactive power compensator, described reactive power compensator links to each other with electrical network with the parallel network reverse power supply respectively, described reactive power compensator also is connected with counterflow-preventing, idle compensating control communication, described counterflow-preventing, idle compensating control judge whether the power factor of electrical network access point is lower than preset value, thereby the control idle power output of parallel network reverse power supply and reactive power compensator carry out reactive power compensation to electrical network.
9. according to claim 3 or 6 described counterflow-preventings, reactive compensation system, it is characterized in that: described system also comprises energy-storage system, described energy-storage system links to each other with electrical network with the parallel network reverse power supply respectively, described energy-storage system also with counterflow-preventing, the idle compensating control communication connects, counterflow-preventing, idle compensating control judges whether whether the power factor that adverse current and electrical network access point occur is lower than preset value, thus the meritorious power output of control parallel network reverse power supply and the charging of energy-storage system, the idle power output of the non-return stream of discharge-preventing and control parallel network reverse power supply and energy-storage system is carried out reactive power compensation to electrical network.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220221401 CN202712872U (en) | 2012-05-17 | 2012-05-17 | Grid-connected inverter and backflow prevention and reactive compensation controller and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220221401 CN202712872U (en) | 2012-05-17 | 2012-05-17 | Grid-connected inverter and backflow prevention and reactive compensation controller and system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956766A (en) * | 2013-12-27 | 2014-07-30 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Distributed-power-supply connection measurement and control and protection all-in-one machine and method |
| CN105490305A (en) * | 2016-02-02 | 2016-04-13 | 国网上海市电力公司 | Distributed energy access system and power grid power factor improving method thereof |
| CN106532708A (en) * | 2017-01-06 | 2017-03-22 | 大连港机械有限公司 | Variable frequency power supply reverse power control system applicable to shore power system |
| CN111009908A (en) * | 2018-12-20 | 2020-04-14 | 国网上海市电力公司 | Scheme for realizing low-power phase modulation operation of gas turbine by utilizing electrical energy storage |
| CN111725841A (en) * | 2020-07-03 | 2020-09-29 | 石家庄科林物联网科技有限公司 | Photovoltaic inverter-based power quality optimization method for distribution transformer area |
| CN112270073A (en) * | 2020-10-09 | 2021-01-26 | 合肥阳光新能源科技有限公司 | Countercurrent early warning method and device and computer storage medium |
-
2012
- 2012-05-17 CN CN 201220221401 patent/CN202712872U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956766A (en) * | 2013-12-27 | 2014-07-30 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Distributed-power-supply connection measurement and control and protection all-in-one machine and method |
| CN105490305A (en) * | 2016-02-02 | 2016-04-13 | 国网上海市电力公司 | Distributed energy access system and power grid power factor improving method thereof |
| CN106532708A (en) * | 2017-01-06 | 2017-03-22 | 大连港机械有限公司 | Variable frequency power supply reverse power control system applicable to shore power system |
| CN111009908A (en) * | 2018-12-20 | 2020-04-14 | 国网上海市电力公司 | Scheme for realizing low-power phase modulation operation of gas turbine by utilizing electrical energy storage |
| CN111009908B (en) * | 2018-12-20 | 2024-05-14 | 国网上海市电力公司 | Scheme for realizing low-power phase modulation operation of combustion engine by utilizing electric energy storage |
| CN111725841A (en) * | 2020-07-03 | 2020-09-29 | 石家庄科林物联网科技有限公司 | Photovoltaic inverter-based power quality optimization method for distribution transformer area |
| CN112270073A (en) * | 2020-10-09 | 2021-01-26 | 合肥阳光新能源科技有限公司 | Countercurrent early warning method and device and computer storage medium |
| CN112270073B (en) * | 2020-10-09 | 2024-05-10 | 阳光新能源开发股份有限公司 | Counter-current early warning method and device and computer storage medium |
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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. |
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Granted publication date: 20130130 |