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公开(公告)号：EP3419137A1
公开(公告)日：2018-12-26
申请号：EP17840585.8
申请日：2017-06-29
发明人： ZHENG, Dehua , ZHANG, Wei , WEI, Dan , QIU, Fudong
摘要： Provided are a micro-grid dynamic stability control system and a micro-grid dynamic stability control method. The system includes: a micro-grid dynamic stability control device (127), configured to acquire a real-time voltage and a real-time current of a bus and calculate a power factor based on the real-time voltage and the real-time current; a central control device (101), configured to receive the power factor and transmit a reactive power control instruction in a case that the power factor is lower than a predefined threshold; and at least one local control device, configured to receive the reactive power control instruction and transmit a control signal to the micro-grid dynamic stability control device and at least one distributed power supply controlled by the at least one local control device. The micro-grid dynamic stability control device, in response to the control signal, compensates the voltage of the bus by means of droop control, and the at least one distributed power supply, in response to the control signal, outputs a reactive power to the bus to increase the power factor of the bus.
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公开(公告)号：EP3376625A1
公开(公告)日：2018-09-19
申请号：EP17868494.0
申请日：2017-07-07
发明人： QIAO, Yuan , ZHANG, Yi , XIAO, Di
IPC分类号： H02J3/16
CPC分类号： H02J3/18 , H02J3/383 , H02J3/386 , Y02E10/723 , Y02E10/763 , Y02E40/30 , Y02E40/34
摘要： Provided are a reactive power control method, a reactive power control device and a reactive power control system. The device includes: a communication interface (201), configured to receive a reactive power requirement command; an input interface (202), configured to acquire an electrical quantity parameter of a preset control point; a strategy calculation module (203), configured to calculate a target reactive power value meeting the reactive power requirement command based on the electrical quantity parameter, and allocate reactive power to be provided by a regulatable reactive device based on the target reactive power value; and an output interface (204), configured to send a command for providing the allocated reactive power to the regulatable reactive device. Multiple types of coordinated control are achieved, power loss is reduced and power generation benefit is increased.
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公开(公告)号：EP2963757B1
公开(公告)日：2018-06-20
申请号：EP13876590.4
申请日：2013-02-28
申请人： Hitachi, Ltd.
发明人： KUMAGAI Masatoshi , OMI Shota , YAMANE Kenichiro , HARADA Yasushi , WATANABE Masahiro , SATO Yasuo , TOMITA Yasushi
摘要： An electric power system control system for an electric power system in which loads and voltage control devices are connected together via nodes comprises distributed controllers for issuing control commands to the voltage control devices. The distributed controller includes a measurement value data collection functional unit, a state estimation functional unit and an optimum control functional unit. The measurement value data collection functional unit collects measurement value data from sensors measuring voltage and current in its own node and other nodes. The state estimation functional unit receives the measurement values of voltage and current of the own node and the other nodes as input data, estimates voltage or current as a state quantity of each of other nodes from which the measurement value data cannot be collected, and outputs the estimate values. The optimum control functional unit receives input data such as the measurement value data, the estimate values outputted from the state estimation functional unit and a voltage target value that has been set for each node and outputs a control command based on operation amounts to be distributed to the voltage control devices of the nodes. The voltage in the electric power system is controlled by superposition of voltage control amounts by the voltage control devices.
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公开(公告)号：EP3322061A1
公开(公告)日：2018-05-16
申请号：EP16198707.8
申请日：2016-11-14
申请人： Nordex Energy GmbH
发明人： De Rijcke, Simon , Bode, Florian
IPC分类号： H02J3/24
摘要： Method of damping electromechanical oscillations on a power system by injecting reactive power generated by one or more wind energy turbines, wherein a reactive power controller is adapted to determine a reference reactive power value (Q ref ) depending on an actual system voltage (U meas ), the method comprising:
- measuring oscillation data associated with the power system,
- filtering the measured oscillation data to remove a steady state offset,
- providing a gain and a phase shift to the filtered oscillation data to compensate
o a gain in the reference reactive power value (Q ref ) caused by the reactive power controller in response to electromechanical oscillations, and
o a delay in the reference reactive power value (Q ref ) caused by the reactive power controller, and to generate corrected oscillation data, and
- determining a reactive power setpoint (Q set ) to be injected into the power system by the one or more wind energy turbines based on the reference reactive power value (Q ref ) and the corrected oscillation data, wherein the damping is continuously applied to the oscillation data.摘要翻译： 通过注入由一个或多个风力涡轮机产生的无功功率来衰减电力系统上的机电振荡的方法，其中无功功率控制器适于根据实际系统电压（Umeas）确定参考无功功率值（Qref），所述 方法，包括： - 测量与所述电力系统相关联的振荡数据， - 对所测量的振荡数据进行滤波以去除稳态偏移， - 向所述经滤波的振荡数据提供增益和相移以补偿所述参考无功功率值中的增益（ Qref）由无功功率控制器响应于机电振荡引起，并且o由无功功率控制器引起的参考无功功率值（Qref）的延迟并且生成校正的振荡数据，以及 - 确定无功功率设定点（Qset） 基于参考无功功率值（Qref）an由一个或多个风力涡轮机注入电力系统 d校正的振荡数据，其中阻尼连续地施加到振动数据。
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公开(公告)号：EP2525463B1
公开(公告)日：2018-03-21
申请号：EP12167914.6
申请日：2012-05-14
发明人： Schmid, James Joseph
CPC分类号： H02J3/1828 , H02J3/16 , H02J13/0062 , H02J13/0079 , H02J13/0086 , Y02E40/34 , Y02E40/74 , Y02E60/726 , Y02E60/7838 , Y04S10/22 , Y04S10/24 , Y04S40/124
摘要： A method for reducing effects of a demand/response event in a power distribution network can include identifying a load profile in the power distribution network, in response to detecting a peak (311, 313) in the load profile, decreasing voltage in the power distribution network and in response to a detecting a trough (312) in the load profile, increasing the voltage in the power distribution network.
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公开(公告)号：EP3255751A1
公开(公告)日：2017-12-13
申请号：EP17179298.9
申请日：2009-02-24
CPC分类号： F03D7/028 , F03D7/048 , F05B2240/96 , F05B2270/1033 , H02J3/16 , H02J3/386 , Y02E10/723 , Y02E10/763 , Y02E40/34 , Y10T307/718
摘要： A windfarm system 200 is provided that is optimized for minimizing electrical loss. The windfarm system 200 includes a plurality of wind turbine generators 201, 202, 203 and a collector system 205 including a conductor or network of conductors 215, 216, 217. The collector system 205 also including a plurality of transformers 210, 211, 212 with one or more transformers connected between each wind turbine generator and the conductors, and a substation transformer 224 connecting the windfarm collector system 205 to the electrical grid. The windfarm system 200 also includes a monitoring system 232 for monitoring the windfarm system electrical output 245 and thermal condition, and outputs 207, 208, 209 of the individual wind turbine generators. A control function 250 may include voltage and real and reactive power commands 251, 252, 253 to the individual wind turbine generators. The control function 250 incorporates an algorithm 220 whose technical effect is minimizing electrical losses for the windfarm system 200.
摘要翻译： 提供风电场系统200，其被优化用于最小化电损失。 风电场系统200包括多个风力涡轮发电机201,202,203和包括导体或导体网络215,216,217的收集器系统205.收集器系统205还包括多个变压器210,211,212，其中 连接在每个风力涡轮发电机和导体之间的一个或多个变压器以及将风电场收集器系统205连接到电网的变电站变压器224。 风电场系统200还包括用于监测风电场系统电输出245和热状况的监测系统232以及各个风力涡轮发电机的输出207,208,209。 控制功能250可以包括到各个风力涡轮发电机的电压和有功功率命令251和无功功率命令253。 控制功能250包含算法220，其技术效果是使风电场系统200的电损失最小化。
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公开(公告)号：EP2175540B1
公开(公告)日：2017-12-13
申请号：EP09172056.5
申请日：2009-10-02
发明人： Larsen, Einar V. , Walling, Reigh A. , Clark, Kara
CPC分类号： H02J3/386 , F03D9/255 , F03D9/257 , H02J3/16 , H02J2003/007 , Y02E10/72 , Y02E10/763 , Y02E40/34
摘要： A voltage control system and method for multiple windfarms (810, 815, 820) with transmission lines (898). Voltage is regulated at a point of regulation (825) on the system, such as a high voltage substation or other system bus. At least one other constraint point in the system may be monitored and controlled to prevent voltage exceeding the limit at the point of constraint. Regulation is achieved at the point of regulation (825) by sensing the voltage, comparing to a reference voltage (847), and adjusting the reactive power output of the wind turbines (60) and other equipment in the system. The regulation point (825) may be shifted to at least one other constraint point (805) needed to respect voltage limits at that points of the system after attempting to shift reactive load to restore voltage within limits at the other points in the system. The reference voltage (847) may be adjusted to minimize losses for the system of multiple windfarms and transmission lines. A loss optimizing algorithm (890) is applied to the combined multiple windfarm and transmission lines (898) to shift reactive load (850, 851, 852) among local windfarms (810, 815, 820) and transmission lines (898) to minimize losses and to shift reactive load among individual wind turbines (60) within an individual windfarm.
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公开(公告)号：EP2164147A3
公开(公告)日：2017-08-23
申请号：EP09169440.6
申请日：2009-09-04
发明人： Garces, Luis Jose , Liu, Yan , De Rooij, Michael , Bose, Sumit
CPC分类号： H02J3/1842 , H02J3/16 , H02J3/383 , Y02E10/563 , Y02E40/22 , Y02E40/34
摘要： A method of providing reactive power support is proposed. The method includes detecting at least one of a plurality of network parameters in a distributed solar power generation system (10). The generation system (10) includes a plurality of photovoltaic modules (12,26) coupled to a grid via inverters (14,16). The method further includes sensing a state of the photovoltaic modules (12,26) coupled to the distributed solar power generation system (10) and determining a reactive power measure based upon the sensed state and the detected network parameters. The reactive power measure is used to generate a reactive power command. The reactive power command is further used to compensate reactive power in the distributed solar power generation system (10).
摘要翻译： 提出了一种提供无功功率支持的方法。 该方法包括检测分布式太阳能发电系统（10）中的多个网络参数中的至少一个。 发电系统（10）包括经由逆变器（14,16）耦合到电网的多个光伏模块（12,26）。 该方法进一步包括感测耦合到分布式太阳能发电系统（10）的光伏模块（12,26）的状态并基于感测到的状态和检测到的网络参数确定无功功率测量。 无功功率测量用于生成无功功率命令。 无功功率命令还用于补偿分布式太阳能发电系统（10）中的无功功率。
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公开(公告)号：EP3204996A1
公开(公告)日：2017-08-16
申请号：EP15771015.3
申请日：2015-09-22
CPC分类号： H02J3/1885 , F03D7/0272 , F03D7/0284 , F05B2270/1033 , H02H7/067 , H02J3/16 , H02J3/18 , H02J3/28 , H02J3/386 , H02P9/04 , Y02E10/723 , Y02E10/763 , Y02E40/34
摘要： The present invention relates to a method for operating a wind power facility in order to provide reactive power support to a power grid, the method comprising the step of increasing an amount of reactive power injected into the power grid, decreasing an amount of active power injected into the power grid by a certain amount, and dissipating and/or storing essentially said certain amount of active power in power dissipation and/or power storage means. The wind power facility may comprise a wind turbine or a wind power plant.
摘要翻译： 本发明涉及一种用于运行风力发电设施以便向电网提供无功功率支持的方法，所述方法包括以下步骤：增加注入到电网中的无功功率量，减少注入的有功功率量 进入电网一定量，并且在功率耗散和/或功率存储装置中基本上消散和/或存储所述一定量的有功功率。 风力发电设施可以包括风力涡轮机或风力发电站。
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公开(公告)号：EP3171477A1
公开(公告)日：2017-05-24
申请号：EP16199060.1
申请日：2016-11-16
申请人： Hitachi, Ltd.
发明人： KONDO, Shinichi , NAKATANI, Masachika , WATANABE, Masahiro , SAKAMOTO, Kiyoshi , SAEKI, Mitsuru
CPC分类号： H02J3/386 , H02J3/16 , H02J3/46 , Y02E10/763 , Y02E40/34
摘要： Provided is a wind farm (100) including a control device (3) that adjusts power supplied from a wind power generation device (GW) through a power converter (C) to a power system (5). The control device includes a power value estimation unit that obtains information regarding a value of an active power (Wp) or a reactive power (Wq) in the power system (5), a control effect comparison unit (321) that calculates a control effect from the information regarding the value of the active power (Wp) or the reactive power (Wq) which is obtained by the power value estimation unit and information regarding a loss in a portion ranging from the converter to an association point (X) of the power system (5), and a control plan (CP) determination unit (32) that provides to the outside an instruction for or transmits, as a control plan (CP), the active power (Wp) or the reactive power (Wq) at the time of maximizing the control effect obtained by the control effect comparison unit (321) with respect to a plurality of sets of operation conditions in the power system (5).
摘要翻译： 提供一种包括控制装置（3）的风电场（100），所述控制装置（3）调节从风力发电装置（GW）通过电力转换器（C）供应到电力系统（5）的电力。 控制装置包括：功率值估计单元，其获得关于电力系统（5）中的有功功率（Wp）或无功功率（Wq）的值的信息;控制效果比较单元（321），其计算控制效果 从关于由功率值估计单元获得的有功功率（Wp）或无功功率（Wq）的值的信息和关于从变换器到变换器的关联点（X）的部分中的损失的信息 电力系统（5）以及控制计划（CP）确定单元（32），该控制计划（CP）确定单元向外部提供作为控制计划（CP）的有效功率（Wp）或无功功率（Wq） 在使由控制效果比较单元（321）获得的控制效果相对于电力系统（5）中的多组操作条件最大化时。
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