CN107706943A - A kind of grid-connected open-circuit system of the lossless intelligent division of anti-isolated island with independent acquisition point and breaking method - Google Patents
A kind of grid-connected open-circuit system of the lossless intelligent division of anti-isolated island with independent acquisition point and breaking method Download PDFInfo
- Publication number
- CN107706943A CN107706943A CN201711105820.7A CN201711105820A CN107706943A CN 107706943 A CN107706943 A CN 107706943A CN 201711105820 A CN201711105820 A CN 201711105820A CN 107706943 A CN107706943 A CN 107706943A
- Authority
- CN
- China
- Prior art keywords
- lossless
- photovoltaic
- intelligent breaker
- lossless intelligent
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000005611 electricity Effects 0.000 claims abstract description 20
- 238000005286 illumination Methods 0.000 claims description 8
- 230000000630 rising effect Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 230000003313 weakening effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract 1
- 238000012544 monitoring process Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H02J3/383—
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
Abstract
A kind of grid-connected open-circuit system of the lossless intelligent division of of the invention anti-isolated island with independent acquisition point and breaking method, belong to the lossless intelligent grid-connected open-circuit system technical field of division of anti-isolated island with independent acquisition point；Technical problem to be solved is：Provide a kind of lossless intelligent division photovoltaic parallel in system method of the anti-isolated island with independent acquisition point, light conditions can be gathered from sampled point, according to light conditions, grid-connected breaker is controlled voluntarily to be switched on or switched off, so as to avoid photovoltaic generating system from producing grid loss electricity at night；Solve technical scheme that the technical problem uses for：After the DC power output end concatenation dc switch group of photovoltaic components in photovoltaic plant, it is connected with the direct-flow input end of combining inverter, the ac power output of lossless intelligent breaker is connected with the ac output end of combining inverter；Photovoltaic collection substation is arranged on beside photovoltaic plant, and the DC power output end of photovoltaic collection substation photovoltaic module is connected with the signal input part of lossless intelligent breaker；Present invention installation is applied in grid-connected circuit.
Description
Technical field
The present invention proposes a kind of grid-connected open-circuit system of the lossless intelligent division of anti-isolated island with independent acquisition point and broken
Path method, belong to the lossless intelligent grid-connected open-circuit system technical field of division of anti-isolated island with independent acquisition point.
Background technology
The grid-connected project of small distributed flourishes at this stage, and one of grid-connected nucleus equipment of distributed photovoltaic is group
String data combining inverter, group string data combining inverter the DC inverter of photovoltaic array into alternating current, and complete with it is public
Power network it is grid-connected；In simple terms, it is exactly under conditions of daytime solar irradiation abundance, inverter completes grid-connected, photovoltaic system
Work, the electricity online sent is sent out, and under conditions of night is without solar irradiation, group string inverter departs from power network, no longer sends out
Electricity is sent out, but the exchange outlet line of inverter is still within electrical connection state with power network, in holding state.
Find that inverter AC is still with the presence of fraction of electric current, power direction under this holding state by monitoring
Inverter is sent to for power network, can thus produce off line electricity, can not be grid-connected in inverter if inventing a kind of switch
The line voltage of AC is disconnected under holding state, is just avoided that and produces off line electricity, effectively reduce grid loss.
When the above situation occurs, it is possible to create the power consumption of inverter, the undertaker of inverter losses electricity, typically
It is required that being divided according to property right, i.e., the idling consumption of inverter should be undertaken by the proprietary owner of inverter.In online generating state
Under, the power of inverter consumption is provided by photovoltaic system, and the generated energy of photovoltaic subtracts inverter autophage electricity equal to upper
Net send out electricity, power network will not extra reception inverter loss of electricity；Under night holding state, the power of inverter consumption
From power network, less off line electricity is shown as, power network actually assume responsibility for the idling consumption electricity of inverter, can so give electricity
Guipure carrys out unnecessary cost payout.
On the other hand, take at present to the generated output of photo-voltaic power generation station and voltage to judge inverter whether in standby
Loss state, sampled point are generally arranged in photo-voltaic power generation station, may be with DC generation side phase during gathered data is monitored
Mutually interference, the failure of Generation Side, whether inverter may be judged by accident in holding state.
The content of the invention
The present invention overcomes the shortcomings of the prior art, and technical problem to be solved is：Provide a kind of with independent
The lossless intelligent division photovoltaic parallel in system method of anti-isolated island of collection point, light conditions can be gathered from sampled point, according to illumination
Situation, grid-connected breaker is controlled voluntarily to be switched on or switched off, so as to avoid photovoltaic generating system from producing grid loss electricity at night；
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：A kind of lossless intelligence of anti-isolated island with independent acquisition point
The energy grid-connected open-circuit system of division, including photovoltaic plant, photovoltaic collection substation, combining inverter, lossless intelligent breaker, institute
After the DC power output end concatenation dc switch group for stating photovoltaic components in photovoltaic plant, the direct-flow input end phase with combining inverter
Even, the ac power input end of the lossless intelligent breaker is connected with utility network, the exchange of the lossless intelligent breaker
Power output end is connected with the ac output end of combining inverter；
The photovoltaic collection substation is arranged on beside photovoltaic plant, the photovoltaic module point of the photovoltaic collection substation and photovoltaic plant
It is not independently arranged, the signal of the DC power output end and lossless intelligent breaker of the photovoltaic collection substation photovoltaic module inputs
End is connected.
LCDs and keyboard are additionally provided with the control panel of the lossless intelligent breaker.
The lossless intelligent breaker is also connected by RS485 data cables with Surveillance center computer.
Electric energy meter is additionally provided between the combining inverter and lossless intelligent breaker.
The photovoltaic collection substation is provided with a fritter photovoltaic battery panel.
A kind of lossless intelligent grid-connected breaking method of division of anti-isolated island with independent acquisition point, comprises the following steps：
Step 1：Collection photovoltaic collection substation solar panel VD U and combining inverter export side in real time
Alternating voltage, the operation keyboard on the control panel of lossless intelligent breaker, or hands- operation is calculated in Surveillance center, to lossless
Input corresponding data inside intelligent breaker, including：Switch starts threshold voltage Up, band carries fluctuation voltage Dp, switch disjunction door
Sill voltage Uc, unloaded fluctuation voltage Dc, fluctuation delay time St, and adjust the upper electricity operation delay for the first time of lossless intelligent breaker
20S；After being provided with, treat that lossless intelligent breaker carries out self-test；
Step 2：During such as daylight abundance, the VD U collected is more than switch startup threshold voltage Up, and voltage
Drop-out value is not more than band and carries fluctuation voltage Dp, now lossless intelligent breaker switch connection；
If after lossless intelligent breaker switch connection, the DC voltage U collected in real time is less than switch startup threshold voltage Up,
And when moving voltage difference Up-Dp less than band carrier wave, then lossless intelligent breaker voluntarily disconnects；
Step 3：When weakening or disappear such as night illumination, the VD U collected is less than switch disjunction threshold voltage Uc,
And voltage rising value is not more than unloaded fluctuation voltage Dc, now lossless intelligent breaker switches off；
After if lossless intelligent breaker switches off, the DC voltage U that collects in real time be more than switch disjunction threshold voltage with
During unloaded fluctuation voltage sum Uc+Dc, then lossless intelligent breaker switch closes.
The present invention possesses following beneficial effect relative to prior art：Because the grid-connected breaker used on the market at present is equal
It can not realize according to light conditions to be suited, the present invention can be passed through by setting a kind of lossless intelligent division breaker
Intensity of illumination is monitored, realizes the automatic division for the power network AC power being connected with photovoltaic system；By with inverter and photovoltaic
Collection substation is used cooperatively, and the present invention can voluntarily cut off the exchange end power supply of inverter under inverter holding state, avoid
Inverter produces idling consumption, when on the solar panels of sunlight to photovoltaic collection substation, the lossless intelligent division open circuit
Device again can be with automatic closing, it is ensured that photovoltaic generating system can normally start grid-connected work；Whole process is adopted to light conditions
Collect the photovoltaic plant independent of generating, but be additionally provided with a set of acquisition system, can avoid between photovoltaic generating system
Interfere, while improve the degree of accuracy judged idling consumption.
Brief description of the drawings
Below in conjunction with accompanying drawing, the present invention will be further described：
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of the lossless intelligent breaker of the present invention；
In figure：1 is photovoltaic plant, and 2 be that photovoltaic gathers substation, and 3 be combining inverter, and 4 be lossless intelligent breaker, 5 be monitoring
Central computer.
Embodiment
As depicted in figs. 1 and 2, a kind of lossless intelligent division of anti-isolated island with independent acquisition point of the present invention is grid-connected disconnected
Road system, including photovoltaic plant 1, photovoltaic collection substation 2, combining inverter 3, lossless intelligent breaker 4, the photovoltaic plant 1
After the DC power output end concatenation dc switch group of photovoltaic module, it is connected with the direct-flow input end of combining inverter 3, the nothing
The ac power input end of damage intelligent breaker 4 is connected with utility network, the AC power output of the lossless intelligent breaker 4
End is connected with the ac output end of combining inverter 3；
The photovoltaic collection substation 2 is arranged on the side of photovoltaic plant 1, the photovoltaic group of the photovoltaic collection substation 2 and photovoltaic plant 1
Part is independently set, the letter of the DC power output end and lossless intelligent breaker 4 of the photovoltaic collection photovoltaic module of substation 2
Number input is connected.
LCDs and keyboard are additionally provided with the control panel of the lossless intelligent breaker 4.
The lossless intelligent breaker 4 is also connected by RS485 data cables with Surveillance center computer 5.
Electric energy meter is additionally provided between the combining inverter 3 and lossless intelligent breaker 4.
The photovoltaic collection substation 2 is provided with a fritter photovoltaic battery panel.
A kind of lossless intelligent grid-connected breaking method of division of anti-isolated island with independent acquisition point, comprises the following steps：
Step 1：The collection photovoltaic collection solar panel VD U of substation 2 and combining inverter 3 export side in real time
Alternating voltage, the operation keyboard on the control panel of lossless intelligent breaker 4, or operated on Surveillance center's computer 5, to
The lossless inside of intelligent breaker 4 input corresponding data, including：Switch starts threshold voltage Up, band carries fluctuation voltage Dp, switch point
Disconnected threshold voltage Uc, unloaded fluctuation voltage Dc, fluctuation delay time St, and adjust the upper electricity operation for the first time of lossless intelligent breaker 4
Be delayed 20S；After being provided with, treat that lossless intelligent breaker 4 carries out self-test；
Step 2：During such as daylight abundance, the VD U collected is more than switch startup threshold voltage Up, and voltage
Drop-out value is not more than band and carries fluctuation voltage Dp, now the lossless switch connection of intelligent breaker 4；
If after the lossless switch connection of intelligent breaker 4, the DC voltage U collected in real time is less than switch startup threshold voltage
Up, and during voltage difference Up-Dp dynamic less than band carrier wave, then lossless intelligent breaker 4 voluntarily disconnects；
Step 3：When weakening or disappear such as night illumination, the VD U collected is less than switch disjunction threshold voltage Uc,
And voltage rising value is not more than unloaded fluctuation voltage Dc, now lossless intelligent breaker 4 switches off；
After if lossless intelligent breaker 4 switches off, the DC voltage U that collects in real time be more than switch disjunction threshold voltage with
During unloaded fluctuation voltage sum Uc+Dc, then the lossless switch of intelligent breaker 4 closes.
The present invention in use, on the one hand measures the power input of lossless intelligent breaker 4 by gathering in real time
Alternating voltage numerical value, to judge grid condition；On the other hand, by gather in real time solar irradiation be mapped to collection substation component on produce
Raw DC voltage, to judge intensity of illumination, the division of breaker is then realized by lossless intelligent breaker 4；
Specifically, the present invention is designed as a kind of switch of photovoltaic generating system AC power supply, is that one kind can pass through prison
Examining system running status automatically controls the intelligent control switch of itself division state, for being supported the use with inverter；In illumination
It can ensure that combining inverter 3 voluntarily cuts off AC power, the standby damage of combining inverter 3 in the standby state during intensity deficiency
Consume just Lock-out；And when in sunlight to solar panels, the lossless and can automatic closing of intelligent breaker 4, it is ensured that whole
Photovoltaic generating system can normally start grid-connected work；The present invention solves existing photovoltaic system and disappeared night charge power is meaningless
The problem of power consumption, effectively reduce grid loss；The present invention can realize electricity again to the monitoring function of grid ac voltage simultaneously
The automatic connection disconnected with power network, the connection with power network automatically when power network has electricity when net has a power failure.
The lossless intelligent breaker 4 is arranged on photovoltaic generating system AC, using intensity of illumination as judgment basis, in light
Breaker disconnects automatically when volt DC voltage is less than certain decision content, the breaker when photovoltaic DC side voltage is higher than certain decision content
Automatic closure；
The lossless intelligent breaker 4 is provided with multichannel input/output port：Wherein ac power output and combining inverter 3
It is connected, for cutting off the AC power of closure combining inverter 3；Lossless intelligent breaker 4 is provided with DC supply input, i.e.,
Signal input part, for gathering the power data of monitoring photovoltaic collection 2 original output of substation, the relevant voltage data that will be collected
By processing, to determine to disconnect and close；The lossless intelligent breaker 4 is internally provided with control chip, can carry out simple
Programming, free setting is carried out to the threshold value of collection voltages, can be in the chain of command of lossless intelligent breaker 4 during setting
Operation keyboard on plate, LCDs can show the data such as present threshold value facilities, working time, while can also pass through
Remote operation monitoring central computer 5 realizes the function such as the setting value to lossless intelligent breaker 3, numerical value monitoring, the nothing
Damage intelligent breaker 4 can be attached by RS485 industrial datas transmission cable and Surveillance center computer 5；It is described lossless
The ac power input end of intelligent breaker 4 can access in general three-phase alternating current utility network；
The present invention is provided with a set of independent photovoltaic collection substation 2, its internal photovoltaic component apparatus set not with photovoltaic electric
Stand and 1 share or connection, belong to a set of independent daylighting electricity generation system, photovoltaic collection substation 2 is provided with a small-power solar energy
Photovoltaic panel, output voltage to lossless intelligent breaker 4 may insure compared with threshold voltage after calculating that controlling switch is opened
Close.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (6)
- A kind of 1. lossless intelligent grid-connected open-circuit system of division of anti-isolated island with independent acquisition point, it is characterised in that：Including Photovoltaic plant（1）, photovoltaic collection substation（2）, combining inverter（3）, lossless intelligent breaker（4）, the photovoltaic plant（1）Light After the DC power output end concatenation dc switch group for lying prostrate component, with combining inverter（3）Direct-flow input end be connected, the nothing Damage intelligent breaker（4）Ac power input end be connected with utility network, the lossless intelligent breaker（4）AC power Output end and combining inverter（3）Ac output end be connected；The photovoltaic gathers substation（2）It is arranged on photovoltaic plant（1）Side, the photovoltaic gather substation（2）With photovoltaic plant（1） Photovoltaic module independently set, the photovoltaic gathers substation（2）The DC power output end of photovoltaic module and lossless intelligence Breaker（4）Signal input part be connected.
- A kind of 2. lossless intelligent grid-connected open circuit system of division of anti-isolated island with independent acquisition point according to claim 1 System, it is characterised in that：The lossless intelligent breaker（4）Control panel on be additionally provided with LCDs and keyboard.
- A kind of 3. lossless intelligent grid-connected open circuit system of division of anti-isolated island with independent acquisition point according to claim 2 System, it is characterised in that：The lossless intelligent breaker（4）Also pass through RS485 data cables and Surveillance center's computer（5）Phase Even.
- A kind of 4. lossless intelligent grid-connected open circuit system of division of anti-isolated island with independent acquisition point according to claim 3 System, it is characterised in that：The combining inverter（3）With lossless intelligent breaker（4）Between be additionally provided with electric energy meter.
- A kind of 5. lossless intelligent grid-connected open circuit system of division of anti-isolated island with independent acquisition point according to claim 1 System, it is characterised in that：The photovoltaic gathers substation（2）It is provided with a fritter photovoltaic battery panel.
- A kind of 6. lossless intelligent grid-connected breaking method of division of anti-isolated island with independent acquisition point, it is characterised in that：Including Following steps：Step 1：Collection photovoltaic collection substation in real time（2）Solar panel VD U and combining inverter（3）Output The alternating voltage of side, in lossless intelligent breaker（4）Control panel on operation keyboard, or in Surveillance center's computer（5） Upper operation, to lossless intelligent breaker（4）Inside input corresponding data, including：Switch starts threshold voltage Up, the dynamic electricity of band carrier wave Dp, switch disjunction threshold voltage Uc, unloaded fluctuation voltage Dc, fluctuation delay time St are pressed, and adjusts lossless intelligent breaker（4） First upper electricity operation delay 20S；After being provided with, lossless intelligent breaker is treated（4）Carry out self-test；Step 2：During such as daylight abundance, the VD U collected is more than switch startup threshold voltage Up, and voltage Drop-out value is not more than band and carries fluctuation voltage Dp, now lossless intelligent breaker（4）Switch connection；If lossless intelligent breaker（4）After switch connection, the DC voltage U collected in real time is less than switch startup threshold voltage Up, and when moving voltage difference Up-Dp less than band carrier wave, then lossless intelligent breaker（4）Voluntarily disconnect；Step 3：When weakening or disappear such as night illumination, the VD U collected is less than switch disjunction threshold voltage Uc, And voltage rising value is not more than unloaded fluctuation voltage Dc, now lossless intelligent breaker（4）Switch off；If lossless intelligent breaker（4）After switching off, the DC voltage U collected in real time is more than switch disjunction threshold voltage During with unloaded fluctuation voltage sum Uc+Dc, then lossless intelligent breaker（4）Switch closure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711105820.7A CN107706943A (en) | 2017-11-10 | 2017-11-10 | A kind of grid-connected open-circuit system of the lossless intelligent division of anti-isolated island with independent acquisition point and breaking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711105820.7A CN107706943A (en) | 2017-11-10 | 2017-11-10 | A kind of grid-connected open-circuit system of the lossless intelligent division of anti-isolated island with independent acquisition point and breaking method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107706943A true CN107706943A (en) | 2018-02-16 |
Family
ID=61179128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711105820.7A Pending CN107706943A (en) | 2017-11-10 | 2017-11-10 | A kind of grid-connected open-circuit system of the lossless intelligent division of anti-isolated island with independent acquisition point and breaking method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107706943A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034583A (en) * | 2019-04-26 | 2019-07-19 | 南京软核科技有限公司 | A kind of distributed photovoltaic island state multi-source monitoring system and monitoring method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009137969A1 (en) * | 2008-05-15 | 2009-11-19 | Xuan Kun | A photovoltaic grid-connected inverter device without a transformer and its control method |
| CN103475022A (en) * | 2013-09-09 | 2013-12-25 | 国家电网公司 | Photovoltaic power station system with low voltage ride through and anti-islanding protection functions |
| US20160028271A1 (en) * | 2014-07-22 | 2016-01-28 | Rick Smith | Grid tie charge controller |
| CN107026473A (en) * | 2017-05-06 | 2017-08-08 | 杨子琦 | A kind of grid-connected control cabinet of novel intelligent economize on electricity |
-
2017
- 2017-11-10 CN CN201711105820.7A patent/CN107706943A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009137969A1 (en) * | 2008-05-15 | 2009-11-19 | Xuan Kun | A photovoltaic grid-connected inverter device without a transformer and its control method |
| CN103475022A (en) * | 2013-09-09 | 2013-12-25 | 国家电网公司 | Photovoltaic power station system with low voltage ride through and anti-islanding protection functions |
| US20160028271A1 (en) * | 2014-07-22 | 2016-01-28 | Rick Smith | Grid tie charge controller |
| CN107026473A (en) * | 2017-05-06 | 2017-08-08 | 杨子琦 | A kind of grid-connected control cabinet of novel intelligent economize on electricity |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034583A (en) * | 2019-04-26 | 2019-07-19 | 南京软核科技有限公司 | A kind of distributed photovoltaic island state multi-source monitoring system and monitoring method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102694381B (en) | Multistage electrical-network self-healing control method | |
| CN106026170B (en) | A kind of control method adjusting photovoltaic combining inverter input power according to network voltage | |
| CN202261101U (en) | Power optimizer and intelligent photovoltaic assembly | |
| AU2018279049B2 (en) | Method and apparatus for bidirectional storage and renewable power converter | |
| WO2008119034A1 (en) | Distributed maximum power point tracking system, structure and process | |
| CN105098837A (en) | Solar photovoltaic grid-connected system | |
| CN108988313A (en) | The system and method for interconnection element for electric system | |
| EP2436094A1 (en) | Apparatus and method for managing and conditioning photovoltaic power harvesting systems | |
| CN102484431A (en) | Adaptive photovoltaic inverter | |
| Alatrash et al. | Enabling large-scale PV integration into the grid | |
| CN105375519A (en) | Grid-connected photovoltaic power generation system and control method therefor | |
| CN111600330A (en) | Micro-grid system | |
| CN104578171A (en) | Control method of direct-current photovoltaic power generating modules | |
| CN103944501A (en) | PID recovery system for solar power station | |
| CN207320847U (en) | A kind of black starting-up device of scene power supply micro-capacitance sensor | |
| CN107706943A (en) | A kind of grid-connected open-circuit system of the lossless intelligent division of anti-isolated island with independent acquisition point and breaking method | |
| CN204858718U (en) | Hierarchical supply control device of microgrid load | |
| CN209488190U (en) | Multi-purpose station electric system | |
| US20220407456A1 (en) | Linkage Protection System and Method for Photovoltaic Power Station | |
| CN105048627B (en) | Photovoltaic plant energy-saving control system and method | |
| CN109768571A (en) | A kind of grid-connected micro grid control system and method | |
| CN115693963A (en) | Intelligent assembly | |
| CN112821353B (en) | Photovoltaic module turn-off device and method for resuming access after photovoltaic module turn-off | |
| CN204131125U (en) | A kind of use for laboratory smart micro-grid system based on multiple distributed power source | |
| CN205509924U (en) | Photovoltaic power generation control system of autonomic formula |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |