WO2018113265A1 - 无功功率的控制方法、装置和系统 - Google Patents
无功功率的控制方法、装置和系统 Download PDFInfo
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- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
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- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/028—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D7/00—Controlling wind motors
- F03D7/02—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor
- F03D7/028—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power
- F03D7/0284—Controlling wind motors the wind motors having rotation axis substantially parallel to the air flow entering the rotor controlling wind motor output power in relation to the state of the electric grid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- 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
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- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
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- H02J3/383—
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- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/50—Controlling the sharing of the out-of-phase component
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2270/00—Control
- F05B2270/10—Purpose of the control system
- F05B2270/103—Purpose of the control system to affect the output of the engine
- F05B2270/1033—Power (if explicitly mentioned)
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- 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
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- 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
- H02J13/00002—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 monitoring
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- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/28—The renewable source being wind energy
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- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1807—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators
- H02J3/1814—Arrangements for adjusting, eliminating or compensating reactive power in networks using series compensators wherein al least one reactive element is actively controlled by a bridge converter, e.g. unified power flow controllers [UPFC]
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- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
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- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1871—Methods for planning installation of shunt reactive power compensators
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- 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
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- 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- 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
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Definitions
- the centralized reactive power compensation equipment in the existing wind power plant can only control its own reactive power output, and cannot control other reactive devices in the field, such as wind power generators or main transformer taps.
- the unit reactive power compensation device in the wind farm has high self-consumption power, generally exceeding 1.5% of its own capacity, and the use cost is high.
- the concentrated reactive power compensation equipment in the wind farm needs more than 50 square meters of floor space and corresponding equipment installation room, cooling system design, etc. The force is once and twice connected, and the construction cost, land acquisition cost, and engineering cost are very high.
- An input interface configured to obtain an electrical quantity parameter of the preset control point
- An output interface that sends an instruction to the controllable reactive device to provide the allocated reactive power.
- the data collection device is configured to collect the electrical quantity parameter of the preset control point, and connect the control device via the communication line.
- a reactive power control method including the following steps:
- a reactive power allocation strategy is generated, and the reactive power allocation strategy is used to calculate the reactive power capability value of the controllable reactive power device in the wind power plant, and allocates the required reactive power to the reactive power device.
- a command for indicating that the controllable reactive device generates the allocated reactive power is sent to the controllable reactive device.
- the reactive power control method, device and system can be widely applied not only to the wind farm but also to other new energy stations, such as photovoltaic farms.
- FIG. 3 is a schematic view showing the arrangement of control points for a wind farm according to an embodiment of the present invention.
- the reactive power control method, apparatus, and system provided by the embodiments of the present invention can be widely applied not only to a wind farm but also to other new energy stations, such as a photovoltaic farm.
- a wind farm for the sake of brevity, the following is only a detailed description of the wind farm.
- the control methods of other new energy stations are similar to those of the wind farm, and the details are not described here.
- the first implementation of the communication between the VMP management device 104 and the AVC server 101 can be relayed by the remote device 102.
- the VMP system can provide a Modbus TCP/RTU protocol, can communicate with the remote device 102 of the wind farm, and accept control commands and upload response data scheduled by the AVC server 101.
- the VMP management device 104 can be based on The Modbus TCP/RTU protocol uploads the telemetry and remote signaling data required for scheduling to the remote device 102.
- the telecontrol device 102 can forward the telemetry and remote signaling data required for scheduling to the AVC server 101 based on the IEC 104 protocol.
- the remote device 102 can receive the remote command issued by the AVC server 101 and forward the remote command to the VMP management device 104.
- control device 200 can support the local control mode and the remote control mode, and can also provide at least one of the voltage control mode, the reactive control mode, and the power factor control mode.
- FIG. 4 is a schematic structural diagram of a reactive power control device according to one or more embodiments of the present invention.
- the reactive power control device 200 may further be provided with: an AC/DC conversion module for converting the collected voltage and current; and a communication for information interaction with the wind power generator, the reactive power compensation device, and the like. Module; an opening and closing module for controlling devices such as switching capacitors and reactors.
- Embodiments of the present invention can communicate with the main change tap controller and issue commands, but do not integrate the tap control logic into the logic of the entire wind farm reactive control.
- the monitoring software can be run on the industrial computer (also can be the monitoring module 210).
- the communication protocol for monitoring information interaction may be Modbus TCP or the like. All running data sets in the VMP management device 104 can be collected in real time by the monitoring software, and these data sets are stored in the real-time history database.
- the monitoring software can analyze and process the real-time data to form historical trend graphs, control strategy data, alarm information, etc., and then display them in real time. Analytical office
- the historical database can be used by users for fault analysis and statistics.
- the monitored data can be processed in other ways as needed to meet different application requirements.
- FIG. 5 is a schematic flowchart of a method for controlling reactive power according to an embodiment of the present invention.
- the electrical quantity parameter of the preset control point is collected, and the reactive power calculation value M2 of the preset control point is calculated based on the electrical quantity parameter.
- a reactive power allocation strategy is generated based on the comparison result and the reactive power target value.
- a command for indicating that the controllable reactive device generates the allocated reactive power is sent to the controllable reactive device.
- S263 Allocating respective reactive powers to be generated for one or more wind power generators based on the reactive power target value and the first reactive power capability value N1.
- S266 Allocating reactive power to be generated by the reactive power compensation device based on the reactive power target value and the second reactive power capability value N2.
- S267 Compare the difference ⁇ M with a third preset dead zone value, wherein the third preset dead zone value is greater than the second preset dead zone value.
- control method may include the following steps:
- the reactive power control is a closed-loop control
- the system detects the reactive power command issued in the real-time, and calculates the reactive power of the grid-connected point according to the voltage and current commands of the collected control point, when the difference between the two is greater than Adjustments are made during the dead zone to ensure control accuracy.
- the electrical quantity parameter is the voltage U and the current I
- the reactive power calculation value M2 is the reactive power Q
- the reactive power Q calculating step includes:
- the first control priority priority control is performed by using the wind turbine's own non-functional power as the main reactive power compensation of the wind farm, and the non-functional force of the reactive power compensation device such as SVG is used as a backup.
- the safety constraint includes at least one of the following: a voltage limit constraint of the preset control point; a voltage abrupt constraint of the preset control point; a terminal voltage constraint of the wind power generator; and a maximum non-function of the wind power generator Force and available non-functional constraints; temperature of the wind turbine's converter Degree constraint; the maximum reactive power compensation capability of the reactive power compensation device.
- S2100 Real-time acquisition of operating data during reactive power control.
Abstract
Description
Claims (25)
- 一种无功功率的控制装置,其特征在于,包括:通信接口,用于接收无功需求命令;输入接口,用于获取预设控制点的电气量参数;策略计算模块,基于所述电气量参数计算满足所述无功需求命令的无功目标值,基于所述无功目标值为可调控无功设备分配需提供的无功功率;输出接口,向所述可调控无功设备发送提供所分配的无功功率的指令。
- 根据权利要求1所述的装置,其特征在于,所述可调控无功设备包括:风力发电机组和无功补偿装置。
- 根据权利要求2所述的装置,其特征在于,所述无功补偿装置包括新能源场站内的以下项中的至少一种:逆变器、电容器、静态无功补偿装置SVC和静态无功发生装置SVG。
- 根据权利要求2所述的装置,其特征在于,还包括:安全限制控制模块,用于设置电压控制的安全约束条件,向所述策略计算模块发送安全控制指令,所述安全控制指令用于指示所述策略计算模块在分配无功功率时,需满足所述安全约束条件。
- 根据权利要求4所述的装置,其特征在于,所述安全约束条件包括以下项中的至少一种:所述预设控制点的电压限值约束;所述预设控制点的电压突变量约束;所述风力发电机组的机端电压约束;所述风力发电机组的最大无功能力和可用无功能力约束;所述风力发电机组的变流器的温度约束;所述无功补偿装置的最大无功补偿能力约束。
- 根据权利要求1所述的装置,其特征在于,还包括:控制模式模块,用于在就地控制方式或者远程控制方式下,提供电压控制模式、无功控制模式和功率因数控制模式中的至少一种控制模式。
- 根据权利要求6所述的装置,其特征在于,还包括:电压控制模块,用于选取所述电压控制模式;所述通信接口,还用于在所述电压控制模式下,接收电压需求命令;所述输入接口,还用于在所述电压控制模式下,获取所述预设控制点的电压参数。
- 根据权利要求6所述的装置,其特征在于,还包括:无功控制模块,用于选取所述无功控制模式;所述通信接口,还用于在所述无功控制模式下,接收无功功率需求命令;所述输入接口,还用于在所述无功控制模式下,采集所述预设控制点的无功功率参数。
- 根据权利要求6所述的装置,其特征在于,还包括:功率因数控制模块,用于选取所述功率因数控制模式;所述通信接口,还用于在所述功率因数控制模式下,接收功率因数需求命令;所述输入接口,还用于在所述功率因数控制模式下,采集所述预设控制点的功率因数参数。
- 根据权利要求6所述的装置,其特征在于,其中:在所述就地控制方式下,所述预设控制点选自:新能源场站内的主变压器与低压母线的接口点;或者在所述远程控制方式下,所述预设控制点选自:新能源场站内的主变 压器与高压母线的接口点。
- 根据权利要求1-10中任意一项所述的装置,其特征在于,所述输入接口还用于:输入利用硬接线方式所采集的所述预设控制点的电气量参数。
- 一种无功功率的控制系统,其特征在于,包括:设置在汇集线路上的至少一台风力发电机组;根据权利要求1-11中任意一项所述的控制装置,经由通信线路分别连接各台风力发电机组;分别与所述至少一台风力发电机组和所述控制装置通信连接的无功补偿设备;和数据采集装置,用于采集预设控制点的电气量参数,经由通信线路连接所述控制装置。
- 一种无功功率的控制方法,其特征在于,包括以下步骤:接收无功需求命令,并基于所述无功需求命令来获取无功命令值M1;采集预设控制点的电气量参数,并基于所述电气量参数来计算得到所述预设控制点的无功计算值M2;计算所述无功命令值M1和所述无功计算值M2的差值△M;基于所述差值△M,得到无功目标值;将所述差值△M与预设死区值比较;基于比较结果和所述无功目标值,生成无功分配策略,所述无功分配策略用于计算风力发电场内的可调控无功设备的无功功率能力值,并向所述可调控无功设备分配需提供的无功功率;基于所述无功分配策略,向所述可调控无功设备发送用于指示所述可调控无功设备产生所分配的无功功率的命令。
- 根据权利要求13所述的方法,其特征在于,所述可调控无功设备 包括:风力发电机组和无功补偿装置。
- 根据权利要求14所述的方法,其特征在于,所述无功补偿装置包括新能源场站内的以下项中的至少一项:逆变器、电容器、静态无功补偿装置SVC和静态无功发生装置SVG。
- 根据权利要求14所述的方法,其特征在于,生成所述无功分配策略的步骤包括:将所述差值△M与第一预设死区值比较,当所述差值△M大于所述第一预设死区值时,计算所述风力发电机组的第一无功功率能力值N1;基于所述无功目标值和所述第一无功功率能力值N1,为所述风力发电机组分配需提供的无功功率。
- 根据权利要求16所述的方法,其特征在于,生成所述无功分配策略的步骤还包括:将所述差值△M与第二预设死区值比较,其中,所述第二预设死区值大于所述第一预设死区值;当所述差值△M大于所述第二预设死区值时,计算所述无功补偿装置的第二无功功率能力值N2;基于所述无功目标值和所述第二无功功率能力值N2,为所述无功补偿装置分配需提供的无功功率。
- 根据权利要求17所述的方法,其特征在于,生成所述无功分配策略的步骤包括:将所述差值△M与第三预设死区值比较,其中,所述第三预设死区值大于所述第二预设死区值;当所述差值△M大于所述第三预设死区值时,基于所述无功目标值、所述第一无功功率能力值N1和所述第二无功功率能力值N2,为所述风力发电机组和所述无功补偿装置分配各自需提供的无功功率。
- 根据权利要求13所述的方法,其特征在于,包括以下步骤:预先设置电压控制模式;在所述电压控制模式下,所述无功命令值M1为电压命令值U CMD,所述电气量参数为电压U,所述差值△M为电压△U,所述电压△U为所述电压命令值U CMD与所述电压U的差值。
- 根据权利要求13所述的方法,其特征在于,包括以下步骤:预先设置无功控制模式;在所述无功控制模式下,所述电气量参数为电压U和电流I,所述无功计算值M2为无功功率Q,其中,所述无功功率Q基于所述电压U和所述电流I计算得到。
- 根据权利要求13所述的方法,其特征在于,还包括以下步骤:预先设置功率因数控制模式;在所述功率因数控制模式下,所述电气量参数为电压U和电流I,所述无功计算值M2为无功功率Q,其中,所述无功功率Q计算步骤包括:基于所述电压U和所述电流I,计算所述预设控制点的有功功率P和计算所述电压U和所述电流I之间的相位差Φ;基于所述有功功率P和所述相位差Φ,计算得到所述无功功率Q。
- 根据权利要求13-21中任意一项所述的方法,其特征在于,所述采集预设控制点的电气量参数包括:利用硬接线采集所述预设控制点的电气量参数。
- 根据权利要求15所述的方法,其特征在于,其中:在就地控制方式下,所述预设控制点选自:所述新能源场站内的主变压器与低压母线的接口点;或者在远程控制方式下,所述预设控制点选自:所述新能源场站内的主变 压器与高压母线的接口点。
- 根据权利要求15所述的方法,其特征在于,还包括以下步骤:预先获取安全约束条件;基于所述安全约束条件、所述比较结果和所述无功目标值,生成所述无功分配策略。
- 根据权利要求24所述的方法,其特征在于,所述安全约束条件包括以下项中的至少一种:所述预设控制点的电压限值约束;所述预设控制点的电压突变量约束;所述风力发电机组的机端电压约束;所述风力发电机组的最大无功能力和可用无功能力约束;所述风力发电机组的变流器的温度约束;所述无功补偿装置的最大无功补偿能力约束。
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