CN106253331A - anti-reflux controller - Google Patents

anti-reflux controller Download PDF

Info

Publication number
CN106253331A
CN106253331A CN201610682643.8A CN201610682643A CN106253331A CN 106253331 A CN106253331 A CN 106253331A CN 201610682643 A CN201610682643 A CN 201610682643A CN 106253331 A CN106253331 A CN 106253331A
Authority
CN
China
Prior art keywords
inverter
counterflow
contactor
control module
reflux controller
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
Application number
CN201610682643.8A
Other languages
Chinese (zh)
Inventor
王鸣
王一鸣
周磊
许颇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NINGBO GINLONG NEW ENERGY TECHNOLOGY Co Ltd
Original Assignee
NINGBO GINLONG NEW ENERGY TECHNOLOGY Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NINGBO GINLONG NEW ENERGY TECHNOLOGY Co Ltd filed Critical NINGBO GINLONG NEW ENERGY TECHNOLOGY Co Ltd
Priority to CN201610682643.8A priority Critical patent/CN106253331A/en
Publication of CN106253331A publication Critical patent/CN106253331A/en
Pending legal-status Critical Current

Links

Classifications

    • H02J3/383—
    • H02J13/0062—
    • 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
    • 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
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
    • Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission

Landscapes

  • Supply And Distribution Of Alternating Current (AREA)
  • Inverter Devices (AREA)

Abstract

One Anti-reflux controller of the present invention, it is installed on networking side, networking side power is monitored, including current transformer, computer control system and the photovoltaic generating system of multiple inverter, multiple inverters are connected with counterflow-preventing control module through universal serial bus, each inverter connects three-phase electricity netting twine through A.C. contactor respectively, and A.C. contactor is arranged at the also site of photovoltaic generating system；It is provided with onboard relay in described counterflow-preventing control module, is used for controlling A.C. contactor；Pin A, B, C connect Current Transmit A, CTB and CTC respectively, are used for power network current of sampling；Pin U, V, W, N connect three-phase electricity netting twine as internal power supply interface, are used for line voltage of sampling；RS485 communication interface and each inverter communication；Wireless WIFI module and computer control system radio communication；Computer control system is controlled in counterflow-preventing control module onboard relay and through each inverter of serial bus control by main frame by the webserver.

Description

Anti-reflux controller
Technical field
The present invention relates to a kind of Anti-reflux controller, control and grid-connected off-network for controlling the power of photovoltaic generating system.
Background technology
Can be fed to main electrical network by service area's transformator according to photovoltaic parallel in system, can be divided into can be countercurrently with irreversible Streamer photovoltaic grid-connected system.Can reversible stream photovoltaic parallel in system remain photovoltaic with the key difference of irreversible streaming system Electric current feeds to electrical network, is all to be supplied by electrical network during customer charge deficiency.Because power department causes harmonic pollution after worrying to network The existence of the uncertain factor such as unstable with line voltage, does not allow to power to electrical network.Counterflow-preventing controls to meet this needs exactly And be born.
Photovoltaic DC-to-AC converter or title solar inverter (also can be called for short inverter) are that the purposes in photovoltaic generating system can It is divided into self reliance type power supply with grid-connected with two kinds.
Application number: 201510206045.9 provide distributed solar energy photovoltaic system and the counterflow-preventing thereof of a kind of counterflow-preventing Method, this system can include multiple Miniature inverter, exchange header box and Anti-reflux controller；The friendship of multiple Miniature inverters Stream output is connected to each other, then is connected with exchange header box；Exchange header box is connected with electrical network and load respectively, and load-receipt is from electricity The electric power that net and/or the conveying of exchange header box direction come；Anti-reflux controller is connected with the also site of electrical network, is being found to have adverse current Control command is produced the when of situation；Anti-reflux controller includes adverse current control module and communication module, countercurrently control module inspection Survey electric current and the voltage of also site, it is judged that whether the generation of adverse current, carry out eliminating adverse current for the control of Miniature inverter；Logical Letter module transmits control command to multiple Miniature inverters, turns off or on certain or some Miniature inverters.The present invention can Make photovoltaic system operate in below the power of load request all the time, thus avoid the generation of adverse current.
Application number: 201320103904.8 relate to a kind of inverter counterflow-preventing control chamber, including Anti-reflux controller and It is used for gathering the counterflow-preventing vasculum of the electric current of the total low-voltage busbar of grid-connected inverters point or low-voltage distribution room, voltage signal, described Anti-reflux controller is connected by universal serial bus with counterflow-preventing vasculum, and described Anti-reflux controller passes through universal serial bus and inversion Device is connected.After using said structure, gather grid-connected inverters point by counterflow-preventing vasculum or the total low pressure in low-voltage distribution room is female The electric current of row, voltage signal, and calculate in real time the descending or up meritorious of grid-connected inverters point or total low-voltage busbar and Reactive power calculates, and then judges whether that adverse current or descending power are less than setting value, thus Anti-reflux controller passes through serial The output electric current of bus marco inverter also finally controls its start and stop.
Application number: 201320679467.4 disclose a kind of grid-connected countercurrent prevention system, including: it is connected with electrical network and energy The Anti-reflux controller that the detection intelligent electric meter of current/voltage, input are connected with described intelligent electric meter, access institute the most in parallel State at least one inverter of the outfan of Anti-reflux controller, the switch of described each inverter output end parallel connection access and institute Stating electrical network ammeter and switch the load connected respectively, described switch input terminal is also connected with Anti-reflux controller outfan, described Inverter input is connected with photovoltaic solar assembly.It uses the intelligent electric meter that can detect voltage x current with Anti-reflux controller even Connect, save extra installation transformer to current signal to Anti-reflux controller, be also convenient for voltage detecting sampling simultaneously, allowed anti- Backflow device more simplifies.
Summary of the invention
Present invention aim at: provide a kind of Anti-reflux controller, by computer and Control.
The object of the invention is realized by following proposal: a kind of Anti-reflux controller, is installed on networking side, to networking side power It is monitored, including current transformer, computer control system and the photovoltaic generating system of multiple inverter, wherein:
Described multiple inverters are connected with counterflow-preventing control module through universal serial bus, and each inverter connects through A.C. contactor respectively Three-phase electricity netting twine, described A.C. contactor is arranged at the also site of photovoltaic generating system；
It is provided with onboard relay in described counterflow-preventing control module, is used for controlling A.C. contactor；Pin A, B, C connect respectively Current Transmit A, CTB and CTC, be used for power network current of sampling；Pin U, V, W, N connect three-phase as internal power supply interface Grid line, is used for line voltage of sampling；RS485 communication interface is for communicating with each inverter；Wireless WIFI module and computer Control system radio communication；
Described computer control system is controlled onboard in counterflow-preventing control module continuing by main frame by the webserver Electrical equipment and through each inverter of serial bus control.
The present invention, for controlling the power of photovoltaic generating system and grid-connected/off-network, uses communication and Control real Existing irreversible solar photovoltaic generation system.
In the present invention, being to use first power to this part to carry out detection monitoring to the control of networking side power, electric current is mutual It is 1000:1,200A that sensor is just used to the power detected herein, such as current transformer ratio, then the inverter that can mount Fully loaded general power cannot be more than 200*220=44KW, say, that according to networking voltage 220V, if inverse beyond 44KW Become device installation amount, just reach the maximum current of detection after current transformer core is saturated, irreversible streaming system cannot be realized.
The principle of the invention is: line voltage current signal carries out computing by main frame control software and relatively or controls Device internal algorithm realizes RS485 communication and relay are made precision maneuver.Eventually through lifting inverter output power also And by the onboard relay of open/close realize photovoltaic inverting system grid-connected/off-network, and power control.By onboard relay band The A.C. contactor of dynamic grid side controls the grid-connected and off-network of photovoltaic generating system, and therefore A.C. contactor is necessarily mounted at photovoltaic At the also site of system.
On the basis of such scheme, each Current Transmit A, CTB and CTC are short leg, the most corresponding inverter output Triple line U, V, W.Current transformer is mainly used to be controlled electrical equipment according to detection signal.To grid side merit When rate is installed, current transformer lead-in wire needs the shortest thus avoids Current Transformer Secondary side line loss, prevents The precision of Anti-reflux controller.
On the basis of such scheme, the described number of onboard relay is mated with the number of inverter.
In the present invention, the method that can use and load multiple-connected battery, networking excess energy is stored up by accumulator Deposit.
The present invention is advantageous in that: control photovoltaic generating system input grid side by RS485 communication and relay Power, and control grid-connected output electricity generation system and off-network.Can realize intelligentized control method, it is also possible to networking side merit is set Rate.
Accompanying drawing explanation
The line graph of Fig. 1 Anti-reflux controller of the present invention；
Label declaration in figure:
11-16 inverter one-six；
2 counterflow-preventing control modules；
The onboard relay of 21-26 one-six；
K1-k6 A.C. contactor one-six；
3 main frames；
4 monitoring servers；
5 loads；
K7, k8 chopper one, two.
Detailed description of the invention
As shown in the line graph of 1 Anti-reflux controller of the present invention:
A kind of Anti-reflux controller, is installed on national grid networking side GRID, is monitored networking side power, mutual including electric current Sensor CT, computer control system, the load 5 of belt fuser two k8 and the photovoltaic generating system of multiple inverter, wherein:
The present embodiment is that 6 inverters one-six 11-16 is connected with counterflow-preventing control module 2 through universal serial bus RS485, inverter One-six 11-16 connects three-phase electricity netting twine through A.C. contactor one-six K1-k6 respectively, and A.C. contactor one-six K1-k6 is arranged on At the also site of photovoltaic generating system；
Be provided with onboard relay one-six 21-26 in described counterflow-preventing control module 2, be connected respectively A.C. contactor one- Six K1-k6, are used for controlling each A.C. contactor；Counterflow-preventing control module 2 pin A, B, C connect respectively Current Transmit A, CTB and CTC, is used for power network current of sampling；Counterflow-preventing control module 2 pin U, V, W, N connect three as internal power supply interface Phase grid line, is used for line voltage of sampling；The RS485 communication interface of counterflow-preventing control module 2 is for inverter one-six inversion Device 11-16 communicates；Wireless WIFI module and computer control system radio communication；
Described computer control system is controlled in counterflow-preventing control module 2 onboard by main frame 3 by monitoring server 4 Relay and through the lifting of each inverter power of serial bus control.
The internal main devices of the counterflow-preventing control module 2 of the present embodiment is simply introduced:
Six onboard relay one-six 21-26, are used for controlling A.C. contactor one-six K1-K6；
Wireless wifi module, with monitoring server 4 radio communication；
RS485 communication interface, for communicating with inverter one-six 11-16；
A, B, C: meet Current Transmit A, CTB, CTC respectively, be used for power network current of sampling；
U, V, W, N: connect three-phase electricity netting twine, for the internal power supply of sample line voltage and Solis-EPM-1/3.
Each inverter output power is controlled by RS485 communication, and client needs how much power, and it is defeated that EPM controls inverter Go out how much power to electrical network.
Onboard relay is for driving A.C. contactor to control the grid-connected and off-network of each inverter, and therefore A.C. contactor must Must be arranged between inverter and electrical network, be broadly that the second layer of photovoltaic DC-to-AC converter output controls.
Each Current Transmit A, CTB and CTC are short leg, triple line U of the most corresponding inverter output, V, W, each electricity Current transformer CTA, CTB and CTC lead-in wire needs the shortest thus avoids Current Transformer Secondary side line loss, prevents anti-reverse The precision of stream controller is low.
Networking side GRID is provided with circuit breaker one K7.
Owing to the Anti-reflux controller of the present invention is a kind of to sacrifice the controller that photovoltaic generation is means.In fact there is also Networking excess energy reaches not sacrifice by the way of accumulator carries out storing use the mesh of the energy of photovoltaic generation output 's.In the present embodiment figure, accumulator is not shown.

Claims (4)

1. an Anti-reflux controller, is installed on networking side, is monitored networking side power, including current transformer, calculating Machine control system and the photovoltaic generating system of multiple inverter, it is characterised in that:
Described multiple inverters are connected with counterflow-preventing control module through universal serial bus, and each inverter connects through A.C. contactor respectively Three-phase electricity netting twine, described A.C. contactor is arranged at the also site of photovoltaic generating system；
It is provided with onboard relay in described counterflow-preventing control module, is used for controlling A.C. contactor；Pin A, B, C connect respectively Current Transmit A, CTB and CTC, be used for power network current of sampling；Pin U, V, W, N connect three-phase as internal power supply interface Grid line, is used for line voltage of sampling；RS485 communication interface is for communicating with each inverter；Wireless WIFI module and computer Control system radio communication；
Described computer control system is controlled onboard in counterflow-preventing control module continuing by main frame by the webserver Electrical equipment and through each inverter of serial bus control.
Anti-reflux controller the most according to claim 1, it is characterised in that: each Current Transmit A, CTB and CTC are short Lead-in wire, triple line U of the most corresponding inverter output, V, W.
Anti-reflux controller the most according to claim 1 and 2, it is characterised in that: the number of described onboard relay with The number coupling of inverter.
Anti-reflux controller the most according to claim 1, it is characterised in that: with load multiple-connected battery, will network unnecessary Energy is stored by accumulator.
CN201610682643.8A 2016-08-18 2016-08-18 anti-reflux controller Pending CN106253331A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610682643.8A CN106253331A (en) 2016-08-18 2016-08-18 anti-reflux controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610682643.8A CN106253331A (en) 2016-08-18 2016-08-18 anti-reflux controller

Publications (1)

Publication Number Publication Date
CN106253331A true CN106253331A (en) 2016-12-21

Family

ID=57592342

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610682643.8A Pending CN106253331A (en) 2016-08-18 2016-08-18 anti-reflux controller

Country Status (1)

Country Link
CN (1) CN106253331A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107069798A (en) * 2017-01-17 2017-08-18 陕西科技大学 The control method and its system of distributed photovoltaic power generation system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102097818A (en) * 2010-01-06 2011-06-15 珠海兴业新能源科技有限公司 Photovoltaic reverse power control and protection system
CN102097817A (en) * 2010-01-06 2011-06-15 珠海兴业新能源科技有限公司 Photovoltaic reverse power controller
CN204030624U (en) * 2014-03-06 2014-12-17 南京冠亚电源设备有限公司 A kind of grid-connected anti-backflow device
CN104682413A (en) * 2013-11-26 2015-06-03 上海航天有线电厂 System and method for anti-countercurrent control based on ARM (advanced RISC machine) architecture
CN206180593U (en) * 2016-08-18 2017-05-17 宁波锦浪新能源科技股份有限公司 Anti -reflux controller

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102097818A (en) * 2010-01-06 2011-06-15 珠海兴业新能源科技有限公司 Photovoltaic reverse power control and protection system
CN102097817A (en) * 2010-01-06 2011-06-15 珠海兴业新能源科技有限公司 Photovoltaic reverse power controller
CN104682413A (en) * 2013-11-26 2015-06-03 上海航天有线电厂 System and method for anti-countercurrent control based on ARM (advanced RISC machine) architecture
CN204030624U (en) * 2014-03-06 2014-12-17 南京冠亚电源设备有限公司 A kind of grid-connected anti-backflow device
CN206180593U (en) * 2016-08-18 2017-05-17 宁波锦浪新能源科技股份有限公司 Anti -reflux controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107069798A (en) * 2017-01-17 2017-08-18 陕西科技大学 The control method and its system of distributed photovoltaic power generation system

Similar Documents

Publication Publication Date Title
CN107076118B (en) Wind turbine converter for modularization string data converter controls
ES2702988T3 (en) Procedures and operating systems of a power generation system
CN102712262B (en) Charging system for electric vehicles
CN211790784U (en) Light stores up and fills integration charging station
CN105720602B (en) Parallel network power generation energy storage inverter is grid-connected-off-grid system and its running gear
CN102290851A (en) Large-scale energy storing device and main circuit thereof
EP3410552B1 (en) Routing power in a power system
CN112398175A (en) Medium-voltage photovoltaic grid-connected inverter system and photovoltaic power generation system
Nthontho et al. Protection of domestic solar photovoltaic based microgrid
CZ307222B6 (en) A device for optimizing the production, consumption and storage of electricity
CN109786866B (en) Plug-and-play battery module and battery energy storage system
CN102468678A (en) Power grid optimized direct current charging system
CN206349764U (en) The single-phase off-network automatic switching control equipment of photovoltaic three-phase grid
CN105556785B (en) Battery system
CN105703402A (en) Micro-grid system and operation control method of micro-grid system
CN104142648B (en) Urban track traffic low-voltage distribution system control terminal
CN105556784A (en) Storage battery system
CN106253331A (en) anti-reflux controller
CN206180593U (en) Anti -reflux controller
Kester et al. A smart MV/LV-station that improves power quality, reliability and substation load profile
CN103560537A (en) Area distribution photovoltaic power supply grid-connected system and control method of area distribution photovoltaic power supply grid-connected system
CN215267668U (en) Energy optimization device applied to single-phase photovoltaic grid-connected power generation
CN212085877U (en) Large-scale unmanned aerial vehicle power supply redundancy system
CN204906318U (en) Cluster fault detection of photovoltaic group device
CN104377832B (en) Support the distribution line on-line monitoring acquisition terminal of solar energy power taking

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20161221