CN203536975U - Distributed power generating grid-connected control circuit - Google Patents

Distributed power generating grid-connected control circuit Download PDF

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Publication number
CN203536975U
CN203536975U CN201320625140.9U CN201320625140U CN203536975U CN 203536975 U CN203536975 U CN 203536975U CN 201320625140 U CN201320625140 U CN 201320625140U CN 203536975 U CN203536975 U CN 203536975U
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CN
China
Prior art keywords
grid
power generation
distributed power
circuit
interface
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.)
Expired - Fee Related
Application number
CN201320625140.9U
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Chinese (zh)
Inventor
孙献春
王培林
黄宏盛
冯超
戴元安
李峰辉
钱璟
钱隆翔
施旭昶
葛琪
朱翔
朱晔
胡喆
梁明源
范付元
徐光福
严伟
张春合
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.)
State Grid Corp of China SGCC
NR Electric Co Ltd
Jiaxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Jiashan Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
NR Electric Co Ltd
Jiaxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd
Jiashan Power Supply Co of State Grid Zhejiang Electric Power 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 State Grid Corp of China SGCC, NR Electric Co Ltd, Jiaxing Power Supply Co of State Grid Zhejiang Electric Power Co Ltd, Jiashan Power Supply Co of State Grid Zhejiang Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201320625140.9U priority Critical patent/CN203536975U/en
Application granted granted Critical
Publication of CN203536975U publication Critical patent/CN203536975U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/70Smart grids as climate change mitigation technology in the energy generation sector
    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation

Abstract

The utility model discloses a distributed power generating grid-connected control circuit, which comprises a main station system and a plurality of distributed power generating power stations. The distributed power generating power stations after being subjected to inversion by an inverter are subjected to grid connection with a public supply network. The distributed power generating grid-connected control circuit also comprises a grid-connected interface device. The grid-connected interface device is connected with a public wiring point. The plurality of distributed power generating power stations after being subjected to inversion by the inverter are connected with a mutual inductor device and are connected with the grid-connected interface device through the public wiring point, and the grid-connected interface device is communicated with the main station system. Through the grid-connected interface device, the distributed power generating electric stations can be comprehensively monitored, equipment information on power generation, environment monitoring and the like in the distributed power generating power stations is collected, the data are transmitted to the main station system in a concentrated way, the grid-connected circuit structure is optimized, the wiring is simplified, the equipment cost is reduced, and the maintenance operation is facilitated for workers.

Description

The grid-connected control circuit of a kind of distributed power generation
Technical field
The utility model relates to distributed power generation interconnection technology, the grid-connected control circuit of especially a kind of distributed power generation.
Background technology
Distributed power generation, typically refer to generated output at several kilowatts to small modular, the distributings of hundreds of megawatts, be arranged near generator unit user, high efficient and reliable, its core is various types of distributed power generations power station, the power supply of the renewable energy power generations such as the wind energy mainly referring to, solar energy, water energy, natural gas, geothermal energy, oceanic energy, biomass energy.After a large amount of distributed power generation power station access electrical networks, electrical network is affected, therefore need to and the voltage of site, electric current, meritorious, idle, power factor etc. monitor, and will in associated electrical tolerance data, sending local power scheduling department, power scheduling department moves by telecontrol system straighforward operation electrical network circuit.Existing distributed power generation is grid-connected specifically to be practiced in process; exist following shortcoming: secondary device more (as protective relaying device, measure and control device, Communications Management Units, telemechanical apparatus, equipment for monitoring power quality) in parallel network circuit; numerous secondary device separate cablings; cause equipment that difficulty is installed; secondary circuit is loaded down with trivial details; and equipment investment expense is large, be unfavorable for applying of distributed photovoltaic power generation.
Utility model content
The purpose of this utility model is to provide the grid-connected control circuit of a kind of distributed power generation, standard distributed power generation access electrical network, optimize parallel network circuit, focus on the circuit signal of secondary device in parallel network circuit, be conducive to secondary device intensive, save equipment investment cost, facilitate staff's attended operation.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: the grid-connected control circuit of a kind of distributed power generation, comprise main station system and several distributed power generation power stations, distributed power generation power station is all grid-connected with public electric wire net after inverter inversion, also comprise network interface device in the lump, described grid-connected interface arrangement has connected public wiring point, several described distributed power generation power stations have connected transformer device and have connected grid-connected interface arrangement by public wiring point after inverter, and described grid-connected interface arrangement is communicated by letter with described master station.Described public wiring point refers to the junction of distributed generation system and public electric wire net, connected transformer device, transformer device has connected grid-connected interface arrangement, grid-connected interface arrangement to the current and voltage signals of instrument transformer transmission gather, computing, calculate generated output, electric weight and analyze the points of common connection quality of power supply, judged whether that electric fault occurs.Grid-connected interface arrangement is not only by coordinating distributed power generation power station is comprehensively monitored with transformer device, by communication mode, gather the smart machine information such as generating, environmental monitoring in distributed power generation power station, and by optical fiber or communication, data centralization is sent to main station system, optimized grid-connected control circuit structure, simplified wiring, save equipment investment cost, facilitated staff's attended operation.
As preferably, described public wiring point place is provided with public circuit breaker, and described grid-connected interface arrangement is provided with control port and outputs control signals to described public circuit breaker.Public circuit breaker is parallel network circuit switch, accepting the breaker tripping and closing of grid-connected interface arrangement controls, when parallel network circuit breaks down or during operation exception, by grid-connected interface arrangement, send trip signal to public circuit breaker, disconnect public circuit breaker, grid-connected interface arrangement also can be accepted to connect or disconnect public circuit breaker from the control signal of master station.
As preferably, described transformer device has comprised current transformer and the voltage transformer of access grid-connected circuit.Current transformer and voltage transformer detect the basic circuit signal of parallel network circuit and are sent to grid-connected interface arrangement.
As preferably, described grid-connected interface arrangement has comprised a control chip and has been connected to the functional circuit of control centre, described functional circuit has comprised observation circuit and communicating circuit, wherein said observation circuit receives the voltage signal of described transformer device, and described communicating circuit sends, receives four distant signals of described main station system and directly communicate by letter with distributed power generation power station.Four described distant signals refer to remote measurement, remote signalling, remote control and remote regulating.
As preferably, the communication interface of described communicating circuit is divided into upstream Interface and downstream interface, and downstream interface is communicated by letter with distributed power generation power station, and upstream Interface is communicated by letter with main station system.Downstream interface is communicated by letter with smart machine in distributed power generation power station and station, collecting device information and assign control command, upstream Interface is communicated by letter with main station system, will in the information of collection, deliver to described master station and scheduling station and accept the control command of main station system.
As preferably, downstream interface also connects a kilowatt-hour meter, gathers kilowatt-hour meter four-quadrant electric quantity data.
As preferably, described distributed power generation power station is photovoltaic power generation array, and described photovoltaic power generation array is electrically connected to header box, and header box output dc voltage is grid-connected through inverter inversion and public electric wire net.
As preferably, described main station system comprises master station and scheduling station.Wherein, master station and scheduling station are two systems separately, and master station is convenient to distributed power generation Control of Power Plant, and scheduling station is the integrated scheduling to whole electrical network.
Adopt after technique scheme, the utlity model has following outstanding advantages: grid-connected interface arrangement is not only comprehensively monitored distributed power generation power station, gather in addition the facility information such as generating, environmental monitoring in distributed power generation power station, data centralization is sent to main station system, optimized parallel network circuit structure, simplify wiring, saved equipment cost, facilitated staff's attended operation.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
Fig. 1 is the utility model structured flowchart;
Fig. 2 is the structured flowchart that the utility model is applied to photovoltaic power generation array.
Embodiment
As shown in Figure 1, the grid-connected control circuit of a kind of distributed power generation, comprise that main station system and several distributed power generation power stations (have only drawn two at Fig. 1, in practical application, can have a plurality of), distributed power generation power station is grid-connected with public electric wire net after inverter inversion, the utility model also comprises network interface device in the lump, described grid-connected interface arrangement has connected public wiring point, several described distributed power generation power stations have all connected transformer device and have connected grid-connected interface arrangement by public wiring point after inverter, described grid-connected interface arrangement is communicated by letter with described main station system, described transformer device has comprised current transformer 1 and the voltage transformer 2 of access grid-connected circuit, grid-connected interface arrangement gathers the current and voltage signals of transformer device transmission, computing, calculate the quality of power supply, generated output, electric weight and judged whether that electric fault occurs.
Described public wiring point place is provided with public circuit breaker, and described grid-connected interface arrangement is provided with control port and outputs control signals to described public circuit breaker.Public circuit breaker is accepted the control of grid-connected interface arrangement, when grid-connected interface arrangement has fault or operation exception according to electric current, voltage judgement parallel network circuit, turn-offing public circuit breaker further expands with Accident prevention, grid-connected interface arrangement also can receive from the control signal of main station system and turn-off or open public circuit breaker, realizes staff's Long-distance Control.
As shown in Figure 2, described distributed power generation power station is photovoltaic power generation array, and described photovoltaic power generation array is electrically connected to header box, and header box output dc voltage is grid-connected through inverter inversion and public electric wire net.Described grid-connected interface arrangement has comprised a control chip and has been connected to the functional circuit of control centre, described functional circuit has comprised observation circuit and communicating circuit, wherein said observation circuit receives the voltage signal of described transformer device, the distant signal of main station system four described in described communicating circuit sending and receiving and directly communicating by letter with distributed power generation power station.Four described distant signals refer to remote measurement, remote signalling, remote control and remote regulating.Particularly, remote measurement (telemetry intelligence (TELINT)): remote measurement.Gather and transmit operational factor, comprise various electric parameters values such as () voltage on circuit, electric current, power and load trend etc.Remote signalling (remote signalling information): remote signal.Gather and transmit various protections and switching value information.Remote control (remote information): Long-distance Control.Accepting and carry out guidance command, is mainly divide-shut brake, and some long-range switching control devices are carried out to Long-distance Control.Remote regulating (remote regulating information): remote adjustment.Accept and carry out remote regulating order, long-range controlled quentity controlled variable equipment is carried out to remote adjustment, as regulated photovoltaic DC-to-AC converter power output.The communication interface of described communicating circuit is divided into upstream Interface and downstream interface, and downstream interface is communicated by letter with distributed power generation power station, and upstream Interface is communicated by letter with main station system.Downstream interface is communicated by letter with smart machine in distributed power generation power station and station, collecting device information and assign control command, upstream Interface is communicated by letter with main station system, will in the information of collection, deliver to described master station and scheduling station and accept the control command of main station system.
Described downstream interface adopts RS485 bus to communicate by letter with inverter, header box, protection measure and control device, environment monitor, kilowatt-hour meter, gathers inverter generating information and state parameter, header box state information, protection observing and controlling action message and measuring amount, environment detector irradiance and wind direction, kilowatt-hour meter four-quadrant electric weight.
Described downstream interface also connects a kilowatt-hour meter, and grid-connected interface arrangement gathers kilowatt-hour meter four-quadrant electric quantity data, is convenient to scheduling controlling.
Described main station system comprises master station and scheduling station.Wherein, master station and scheduling station are two systems separately, and master station is convenient to distributed power generation Control of Power Plant, and scheduling station is the integrated scheduling to whole electrical network.Described upstream Interface adopts optical fiber or wireless GPRS/CDMA to communicate by letter with described main station system, will in the information of collection, deliver to main station system, realizes the monitoring of staff to power station.
Described upstream Interface can be realized stipulations flexible configuration and expansion by the configuration software of communicating by letter with the communication protocol of downstream interface, adapts to the communication protocol requirement of distinct device producer, main website.Typical communication protocol is; adopt Modbus stipulations to communicate by letter with inverter, header box, environment monitor; adopt Modbus or IEC103 stipulations with protection measure and control device; adopt DL/T645 stipulations with kilowatt-hour meter; adopt IEC103 stipulations with master station, adopt IEC101 or IEC104 stipulations to communicate by letter with scheduling station.
Except above preferred embodiment, the utility model also has other execution mode, those skilled in the art can make various changes and distortion according to the utility model, only otherwise depart from spirit of the present utility model, all should belong to the defined scope of the utility model claims.

Claims (8)

1. the grid-connected control circuit of distributed power generation, comprise main station system and several distributed power generation power stations, distributed power generation power station is grid-connected with public electric wire net after inverter inversion, it is characterized in that: also comprise network interface device in the lump, described grid-connected interface arrangement has connected public wiring point, several described distributed power generation power stations have all connected transformer device and have connected grid-connected interface arrangement by public wiring point after inverter, and described grid-connected interface arrangement is communicated by letter with described main station system.
2. the grid-connected control circuit of distributed power generation according to claim 1, is characterized in that: described public wiring point place is provided with public circuit breaker, and described grid-connected interface arrangement is provided with control port and outputs control signals to described public circuit breaker.
3. the grid-connected control circuit of distributed power generation according to claim 2, is characterized in that: described transformer device has comprised current transformer (1) and the voltage transformer (2) of access grid-connected circuit.
4. the grid-connected control circuit of distributed power generation according to claim 2, it is characterized in that: described grid-connected interface arrangement has comprised a control chip and has been connected to the functional circuit of control centre, described functional circuit has comprised observation circuit and communicating circuit, wherein said observation circuit receives the voltage signal of described transformer device, and described communicating circuit sends, receives four distant signals of described main station system and directly communicate by letter with distributed power generation power station.
5. the grid-connected control circuit of distributed power generation according to claim 4, is characterized in that: the communication interface of described communicating circuit is divided into upstream Interface and downstream interface, and downstream interface is communicated by letter with distributed power generation power station, and upstream Interface is communicated by letter with main station system.
6. the grid-connected control circuit of distributed power generation according to claim 5, is characterized in that: described downstream interface also connects a kilowatt-hour meter.
7. the grid-connected control circuit of distributed power generation according to claim 1, it is characterized in that: described distributed power generation power station is photovoltaic power generation array, described photovoltaic power generation array is electrically connected to header box, and header box output dc voltage is grid-connected through inverter inversion and public electric wire net.
8. the grid-connected control circuit of distributed power generation according to claim 1, is characterized in that: described main station system comprises master station and scheduling station.
CN201320625140.9U 2013-10-10 2013-10-10 Distributed power generating grid-connected control circuit Expired - Fee Related CN203536975U (en)

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CN201320625140.9U CN203536975U (en) 2013-10-10 2013-10-10 Distributed power generating grid-connected control circuit

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103532168A (en) * 2013-10-10 2014-01-22 国家电网公司 Distributed power generating grid-connected control circuit
CN104124714A (en) * 2014-08-01 2014-10-29 南京南瑞继保电气有限公司 Method, device and system for controlling distributed generation grid-connected power
CN109696863A (en) * 2018-11-16 2019-04-30 平高集团有限公司 A kind of distributed intelligence switch and its control system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103532168A (en) * 2013-10-10 2014-01-22 国家电网公司 Distributed power generating grid-connected control circuit
CN104124714A (en) * 2014-08-01 2014-10-29 南京南瑞继保电气有限公司 Method, device and system for controlling distributed generation grid-connected power
CN104124714B (en) * 2014-08-01 2016-08-24 南京南瑞继保电气有限公司 A kind of grid-connected Poewr control method of distributed power source, Apparatus and system
CN109696863A (en) * 2018-11-16 2019-04-30 平高集团有限公司 A kind of distributed intelligence switch and its control system
CN109696863B (en) * 2018-11-16 2021-09-24 平高集团有限公司 Distributed intelligent switch and control system thereof

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C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140409

Termination date: 20201010

CF01 Termination of patent right due to non-payment of annual fee