CN107026461A - A kind of new energy station participates in the fast power control method for coordinating of primary frequency modulation - Google Patents

A kind of new energy station participates in the fast power control method for coordinating of primary frequency modulation Download PDF

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Publication number
CN107026461A
CN107026461A CN201710330432.2A CN201710330432A CN107026461A CN 107026461 A CN107026461 A CN 107026461A CN 201710330432 A CN201710330432 A CN 201710330432A CN 107026461 A CN107026461 A CN 107026461A
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China
Prior art keywords
power
new energy
station
frequency modulation
control device
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Pending
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CN201710330432.2A
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Chinese (zh)
Inventor
孙光辉
王淑超
刘为群
王新宝
任祖怡
徐浩
胡绍谦
段胜朋
侯炜
王文龙
陈俊
沈全荣
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.)
NR Electric Co Ltd
NR Engineering Co Ltd
Changzhou NR Electric Power Electronics Co Ltd
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NR Electric Co Ltd
NR Engineering Co Ltd
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Priority to CN201710330432.2A priority Critical patent/CN107026461A/en
Priority to PCT/CN2017/086095 priority patent/WO2018205315A1/en
Publication of CN107026461A publication Critical patent/CN107026461A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
    • H02J3/241—The oscillation concerning frequency
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
    • H02J13/00019—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using optical means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
    • 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

Abstract

Photovoltaic is directed to the present invention relates to one kind, the new energy power station fast power control method for coordinating such as wind-powered electricity generation, the invention in new energy plant stand by setting up a fast power coordinated control system, the system receives the fast power regulating command of steady control main station system and the AGC/AVC planned regulation instruction of control centre, also local offline target power independently can quickly be calculated, then target power is decomposed and be directly issued to by ethernet network and numerous photovoltaic DC-to-AC converters in station, the generator units such as blower fan, active and reactive power governing response within 100 milliseconds of new energy station where realizing, so as to participate in power system primary frequency modulation, reach systems stabilisation frequency and voltage, improve the stability of a system and new energy power station economic operation level.

Description

A kind of new energy station participates in the fast power control method for coordinating of primary frequency modulation
Technical field
The present invention relates to generation of electricity by new energy automatic field, more particularly to one kind is in large-scale new energy photovoltaic plant or wind-powered electricity generation The implementation method for the new energy fast power regulation applied in factory.
Background technology
What most of current China area was taken new energy such as photovoltaic, wind-powered electricity generations is the development mode of extensive centralization, Each extensive new energy development region is dispersed with dozens of new energy plant stand, and the installed capacity of single new energy plant stand is all It is larger.Due to the intrinsic intermittent feature of generation of electricity by new energy, extensive new-energy grid-connected brings to operation of power networks and greatly chosen War.To ensure the safety and stability of the lower operation of power networks of extensive new energy access, since 2011, State Grid Corporation of China has promulgated enterprise Industry standard《Photovoltaic plant access electric power network technique regulation》With《Wind power plant access electric power network technique regulation》, it is proposed that photovoltaic plant, Wind power plant configures the requirement of active power control system (hereinafter referred to as AGC system), and similar also has wanting for voltage control AVC Ask.By taking photovoltaic plant as an example, internal power and the voltage-regulation of standing are typically what is completed by AGC/AVC systems.The communication of the system connects Entering mode is：The equipment such as the inverter in outdoor square formation are typically linked into the Communications Management Units in square formation, communication by serial ports Managing device is converted into after the communication protocols such as IEC104, IEC103 always to be exchanged by the optical fiber ring network access inner ring net that arrives at a station again Machine, then accesses the interior AGC/AVC servers that arrive at a station again by 2~3 grades of interchangers again.In industry, the new energy such as photovoltaic, wind-powered electricity generation electricity The AGC/AVC controls for standing internal start the response time and are generally 20s, and its whole control response time with control centre is general Up to more than 2 minutes, this system can only typically participate in the frequency modulation frequency modulation of a few minutes level of power system, be substantially carried out power train Long period unscheduled power of uniting is adjusted, it is impossible to reach the speed and performance requirement of power system primary frequency modulation.
In recent years, with the popularization of China's renewable new energy especially Photovoltaic new energy generation technology, generation of electricity by new energy Capacity and its ratio in whole power network are being substantially increased.Due to the generations of electricity by new energy such as photovoltaic, wind-powered electricity generation exert oneself it is uncertain Property causes peak load regulation network difficulty especially prominent, and traditional AGC/AVC systems can not meet current operation of power networks slowly because of response speed The demand of adjustment, to improve the security and stability of power network and the reasonability for adjustment of being exerted oneself to new energy, in the urgent need to new energy Power station is actively engaged in power system primary frequency modulation, as conventional thermoelectricity and water power power station, as power network " friendly " electricity Source, when the system failure or emergency episode occur, participate in system primary frequency modulation assist system quickly carry out power-balance regulation with Just system is made to enter stable state as early as possible.It is pointed out that the communication network protocol in new energy power plant station and generating at present Unit communications interface does not support the communication rapidity requirement of above-mentioned Coordinated Control Scheme generally, it is necessary to which the requirement by new scheme is set Communication protocol and interface are counted, the honourable plant stand for newly-built new energy engineering is built by new demand, for existing new energy The communication function transformation of inverter and associated communication network then should be in a planned way conducted batch-wise in plant stand.
In order to reach new design requirement, it is desirable to by the response speed of the generator unit Power Control regulation in new energy power station Degree is greatly promoted, i.e., the power adjusting response times more than original seconds up to a hundred, minute level will be reduced to original 1/1000 times extremely Within 100ms, this is interior to station including power coordination control device and related each appliance arrangement including each generation of electricity by new energy unit Very harsh requirement is proposed with network communication framework, it is necessary to be redesigned and developed to related system.
The content of the invention
The method applied in the present invention is that the device is steady from region by setting up a rapid coordination control device in station The quick receiving power regulating command of control system, and each generator unit execution of whole station is issued at a high speed by ethernet network so that Whole station quickly participates in system primary frequency modulation；Other system is also designed based on Current Voltage collection in station, realizes offline autonomous power Coordinate control, be also involved in system primary frequency modulation；Meanwhile, the long period unscheduled power regulation that device can also receive control centre refers to Order.Generally, this method is so that power coordination control device from region stabilized control system, control centre, and local computing three The mode of kind forms whole station power control instruction.Then, between each generator unit of the power coordination control device and new energy station A high speed communication ethernet network is set up, is realized between photovoltaic DC-to-AC converter, wind power master control and current transformer, energy storage control device High speed communication, so as to control these numerous generator units to carry out coordination control according to the instruction of rapid coordination control device, is realized Quick in 100ms performs response.The step of realizing the invention be：
Step 1：Rapid coordination control device develops the communication interface with stabilized control system, and direct mode is special according to surely controlling Communication channel and steady control main station system communication；Indirect mode is adjusted with receiving the power of Wen Kong main websites by the steady control substation in station Power adjustment commands are forwarded to fast power by device communication modes (such as GOOSE) in station again and assisted by section order, steady control substation Adjust control device.
Step 2：Set up a kind of rapid communication mechanism based on Ethernet so that plant stand power coordination control device is decomposed Order, which can be decomposed rapidly and efficiently, is issued to target generator unit, and target generator unit can quickly receive power command and perform, Solve the problem of existing new energy power station target generator unit is with related control device in station and system communication inefficiency.
Step 3:Tap a new source of energy power station power coordination control device, and the device can be efficient with each generator unit of whole station subordinate Rapid communication, realizes that whole station fast power is decomposed and is issued with communication, and held by the calculating of contact point real-time current voltage acquisition Effect after row regulation, it is considered to whether carry out Secondary Control or fine setting.
Step 4：Exploitation meets communication and fast power responds the generator unit control device of demand, such as photovoltaic inversion Device so that these generator units can quickly receive plant stand fast power control commands, and can quickly perform immediately.
After the above method and system schema, the beneficial effects of the invention are as follows：
1st, when electric network fault or in emergency circumstances, current stabilized control system mainly by cut off new energy station " cut machine-cut bear The method of lotus " keeps system stable, and uses after the system, and originally to cut off new energy station can be changed to the power at drop new energy station To realize, the economic operation level at new energy station is greatly improved.
2nd, after using the system, new energy station can be greatly improved and participate in the controllability of system frequency modulation and voltage modulation response and quick Property so that the new energy power station such as wind-powered electricity generation, photovoltaic further to the operation control characteristic of the conventional power plants such as thermoelectricity, water power, This is conducive to improving access digestion capability of the new energy in power network, and in current China three northern areas of China, " limit wind limit light " is extremely serious In the case of, be conducive to improving new energy station economic operation level, be also beneficial to the long term growth of new energy.
3rd, after using the system, originally stabilized control system " the whole station mode of excision new energy " is changed to " drop power mode ", can be The control of following needs system operation provides more option of operation, is conducive to improving power system in the case of extensive new energy access Stability.
4th, after using the system, because energy fast onset goes out the idle potentiality of generation of electricity by new energy unit in itself so that new During energy source station is built, it is possible to reduce or even the reactive-load compensation SVC/SVG equipment needed for cancelling current new energy power station is held with configuration Amount, reduces new energy power station relevant device power consumption, reduces relevant device investment and O＆M cost, improves new energy power station warp Ji property.
Brief description of the drawings
Fig. 1 new energy plant stand cooperation control system of power architectural frameworks.
Fig. 2 new energy plant stand cooperation control system of power embodiment figures.
Fig. 3 photovoltaic plant new energy cooperation control system of power communications rack compositions.
Fig. 4 wind power plant new energy cooperation control system of power communications rack compositions.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation is described.Obviously, described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
1) a plant stand fast power coordinated control system, the system as shown in Figure 1 and Figure 2, are set up in new energy plant stand Power voltage instruction is calculated in real time to the stabilized control system that the steady control execution substation of upper reception is forwarded, steady control performs substation and new energy Can be using Express communication protocols such as GOOSE or Ethercat between source system coordination control device.In addition, system coordination control Device processed also receives power, the voltage Planning Directive that control centre is issued by modes such as IEC104, IEC103 stipulations.Same fashionable dress The voltage and current in the power station of collection new energy itself is put, locally associated instruction can also be formed according to corresponding strategies.By with Upper various optional modes are obtained after National Federation of Trade Unions's power target instruction, carry out whole station decomposition and by Fast Ethernet network be issued to The equipment such as generator unit and SVG, energy storage such as photovoltaic DC-to-AC converter, blower fan in standing, these equipment meet rapid communication and fast power The correlated condition of execution, cooperative control device can be the branch such as GOOSE, Ethercat to lower and each generator unit communications protocol Hold the agreement of rapid communication.
2) in methods described power coordination control device 4 kinds of main operation modes, priority arranges difference from high to low It is：
(1) when there is stable problem after electric power system fault, new energy station power coordination control device receives stabilized control system Main website or the order of base substation, each generator unit of quick regulation it is active with it is idle, maintain electric power system transient stability, frequency steady Fixed, voltage stabilization；
(2) when power system frequency is abnormal, the frequency that new energy station power coordination control device is measured by grid entry point automatically With the active output of generator unit in given frequency modulation curve adjustment plant stand；
(3) during grid entry point electric voltage exception, new energy station power coordination control device automatically by grid entry point measure voltage and The idle output of each generator unit, maintains grid entry point voltage in given pressure regulation curve adjustment plant stand；
(4) under normal steady state running status, cooperative control device receives the AGC/AVC planned regulation life of grid dispatching center Order, is power system frequency modulation frequency modulation service, controls each generator unit to be generated electricity by active power of working out a scheme, and adjusts idle with dimension Hold the voltage level of grid entry point.
3) such as equipment such as photovoltaic DC-to-AC converter, wind electric converter, energy storage control device of the generator unit in new energy power station, is opened Hair can support the Express communication protocols such as GOOSE, Ethercat, interact, have with station internal power cooperative control device rapid communication The standby ability for being received in 20~30ms and target power regulation being completed according to itself current device state.
4) after power coordination control device is according to corresponding strategies formation dependent instruction, light is handed down to by Fast Ethernet Lie prostrate the reactive-load compensation equipments such as generating equipment and SVG such as inverter, blower fan.When can not be met by regulating command require when, may be used also By the way of by excision collection electric line, power adjusting is rapidly completed.The mode of excision collection electric line can use hardwire, Can also be using modes such as process layer GOOSE.
5) as shown in figure 3, in new energy photovoltaic plant, photovoltaic arrays are divided into centralized square formation and group string data square formation two Kind.For centralized square formation, inverter is directly connected with the ring exchanger in square formation.In group string data square formation, inverter number Directly it is connected according to collector with the ring exchanger in square formation, data acquisition unit gathers to lower and controls group string data in this square formation Inverter.The ring exchanger composition optical fiber ring network of each square formation, is then summarised in total ring exchanger of booster stations.Power is assisted Control device is adjusted to be connected by Ethernet interface access with the total ring exchanger of booster stations.Have simultaneously in booster stations stabilized control system and Telecontrol system.Telecontrol system receives the power instruction or voltage instruction that control centre issues and is transmitted to power coordination controller. Stabilized control system is handed down to power coordination control device when grid collapses according to stability control strategy production regulating command. Power coordination control device is according to the lower state that the equipment such as generator unit and SVG is gathered by communication mode, and production regulation refers to Order, the inversion in SVG equipment, centralized inverter and group string data square formation is handed down to by optical fiber ring network with Fast Ethernet agreement Device dataset acquisition device, group string data square formation data acquisition unit will further instruct each group of string data being distributed in this square formation Inverter, so as to realize quick power coordination control.
6) as shown in figure 4, in new energy wind power plant, blower fan master control is connected with ring exchanger, each generator unit Ring exchanger constitutes optical fiber ring network, is then summarised in total ring exchanger of booster stations.Power coordination control device by with Too network interface access is connected with the total ring exchanger of booster stations.There is stabilized control system and telecontrol system in booster stations simultaneously.Telemechanical system System receives the power instruction or voltage instruction that control centre issues and is transmitted to power coordination controller.Stabilized control system is sent out in power network When raw failure power coordination control device is handed down to according to stability control strategy production regulating command.Power coordination control device According to it is lower by communication mode gather the equipment such as blower fan master control and SVG state, generate regulating command, by optical fiber ring network with Fast Ethernet agreement is handed down to SVG equipment and blower fan master control, and regulating command is transmitted to current transformer by blower fan master control control, so that Realize quick power coordination control.

Claims (5)

1. a kind of new energy station participates in the fast power control method for coordinating of primary frequency modulation, it is characterised in that：Setting up includes steady control Three layers of cooperation control system of power of system, power coordination control device and generation of electricity by new energy unit connection composition；Wherein, power Cooperative control device receives the power voltage regulating command sent from stabilized control system, control centre, or, by local computing The power voltage regulating command of generation, above-mentioned power voltage regulating command resolves into active and reactive instruction and by quick ether It is off the net to be sent to each generation of electricity by new energy unit, the active and reactive power governing response of whole station is realized, power system is participated in and once adjusts Frequently.
2. a kind of new energy station according to claim 1 participates in the fast power control method for coordinating of primary frequency modulation, it is special Levy and be：Methods described corresponds to 4 kinds of running statuses respectively, and priority is arranged from high to low is respectively：
(1) when there is stable problem after electric power system fault, power coordination control device receives main website or base substation is surely controlled and is The order of system, adjusts each generator unit active with idle, maintenance electric power system transient stability, frequency stabilization, voltage stabilization；
(2) when power system frequency is abnormal, frequency and given frequency modulation curve that power coordination control device is measured by grid entry point Adjust the active output of generator unit in plant stand；
(3) during grid entry point electric voltage exception, the voltage and given pressure regulation curve that power coordination control device is measured by grid entry point are adjusted The idle output of each generator unit in whole plant stand, maintains grid entry point voltage；
(4) under normal steady state running status, power coordination control device receives the AGC/AVC planned regulation life of grid dispatching center Order, coordinates and carries out power system frequency modulation frequency modulation, controls each generation of electricity by new energy unit to be generated electricity by given plan active power, and Adjust the idle voltage level to maintain grid entry point.
3. a kind of new energy station according to claim 1 participates in the fast power control method for coordinating of primary frequency modulation, it is special Levy and be：When power coordination control device receives power voltage regulating command from stabilized control system, above-mentioned instruction by with it is steady Control system main website Direct Communication is obtained, or performs substation transfer acquisition by surely controlling；Power coordination control device controls system to steady System uploads this new energy station current power lower and upper limit value, coordinates the reference value for controlling to calculate as stabilized control system.
4. a kind of new energy station according to claim 1 participates in the fast power control method for coordinating of primary frequency modulation, it is special Levy and be：The power adjusting object of the generation of electricity by new energy unit communicated in methods described based on Fast Ethernet includes being provided with fast Photovoltaic DC-to-AC converter, wind power generating set, energy-storage system or the reactive compensation system of fast communication interface.
5. a kind of new energy station according to claim 1 participates in the fast power control method for coordinating of primary frequency modulation, it is special Levy and be：Power coordination control device, also goes power-generation inversion device etc. in operation new energy power station to possess intelligence by breaker tripping and closing order Other related primary equipments outside energy communication interface.
CN201710330432.2A 2017-05-11 2017-05-11 A kind of new energy station participates in the fast power control method for coordinating of primary frequency modulation Pending CN107026461A (en)

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PCT/CN2017/086095 WO2018205315A1 (en) 2017-05-11 2017-05-26 Rapid power coordination control method for new energy station to participate in primary frequency regulation

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