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公开(公告)号：US20170022977A1
公开(公告)日：2017-01-26
申请号：US15039386
申请日：2014-10-30
CPC分类号： F03D17/00 , F03D7/0284 , F03D7/048 , F05B2220/706 , F05B2270/337 , G05B19/0428 , G05B2219/2619 , H02J3/16 , H02J3/18 , H02J3/386 , Y02E10/723 , Y02E10/725 , Y02E10/763 , Y02E40/30
摘要： The present invention relates to a method for supervision of an electrical measurement in a wind power plant, with a plurality of wind turbine generators, the method comprises, a) measuring a measurement of an electrical parameter in the wind power plant, b) determining a difference between the measurement and a reference value, c) in case the difference is greater than a threshold value, incrementing an event counter, d) in case the event counter is incremented, raising a first warning flag. The invention also relates to a power plant controller arranged to supervise a wind power plant according to the method; the wind power plant comprises a plurality of wind turbine generators.
摘要翻译： 本发明涉及一种用于监测风力发电厂中的电测量的方法，具有多个风力涡轮发电机，所述方法包括：a）测量风力发电厂中的电参数的测量，b）确定一个 测量和参考值之间的差异，c）在差值大于阈值的情况下，增加事件计数器，d）在事件计数器增加的情况下，提高第一警告标志。 本发明还涉及一种按照该方法对风力发电厂进行监督的发电厂控制装置; 风力发电厂包括多个风力涡轮发电机。
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公开(公告)号：US09543859B2
公开(公告)日：2017-01-10
申请号：US14604412
申请日：2015-01-23
IPC分类号： H02M7/797 , H02M7/5387
CPC分类号： H02M7/797 , H02J3/18 , H02M7/53871 , H02M2007/53876 , Y02E40/30
摘要： Systems, methods, and devices for use with active/reactive power control in power conditioning systems. To provide quick active/reactive power control by way of a grid-connected inverter, an estimator estimates the P and Q coefficients based on an instantaneous power from the grid-connected inverter. The estimator receives grid current and voltage and estimates of the P and Q coefficients are used with reference P and Q values to determine whether active or reactive power needs to be injected to the grid. The P coefficient is a DC offset of the instantaneous power of the grid and the Q coefficient is the coefficient of a sine component of the instantaneous power.
摘要翻译： 用于功率调节系统中的有功/无功功率控制的系统，方法和装置。 为了通过并网逆变器提供快速有功/无功功率控制，估计器基于并网逆变器的瞬时功率来估计P和Q系数。 估计器接收电网电流和电压，并使用P和Q系数的估计与参考P和Q值来确定有功或无功功率是否需要注入电网。 P系数是电网的瞬时功率的直流偏移，Q系数是瞬时功率的正弦分量的系数。
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公开(公告)号：US09531182B2
公开(公告)日：2016-12-27
申请号：US14433676
申请日：2013-10-02
申请人： Ove Boe
发明人： Ove Boe
摘要： An energizing system for energizing an electric power transmission cable (60) is provided. The electric power transmission cable (60) has an input side (65) coupled to an electric power source (61) and an output side (66) coupled to a load (621). The energizing system includes a first switch (10) connected between the power source (61) and the input side (65) of the power transmission cable (60) to connect and disconnect the power source (61) from the power transmission cable (60). A reactive power compensation unit (50) is further provided for compensating reactive power generated by at least one of the power transmission cable (60) or the load (62). A second switch and a third switch are provided for connecting the reactive power compensation unit (50) in parallel to the first switch (10) or the load (62).
摘要翻译： 提供一种用于激励电力传输电缆（60）的通电系统。 电力传输电缆（60）具有耦合到电源（61）的输入侧（65）和耦合到负载（621）的输出侧（66）。 通电系统包括连接在电源（61）和电力传输电缆（60）的输入侧（65）之间的第一开关（10），用于将电源（61）与电力传输电缆（60） ）。 还提供了一种用于补偿由至少一个电力传输电缆（60）或负载（62）产生的无功功率的无功功率补偿单元（50）。 第二开关和第三开关用于与第一开关（10）或负载（62）并联连接无功功率补偿单元（50）。
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公开(公告)号：US20160344191A1
公开(公告)日：2016-11-24
申请号：US15160882
申请日：2016-05-20
申请人： SunPower Corporation
发明人： Seshadri SIVAKUMAR , Jiyong LIAN
摘要： A photovoltaic power plant includes solar cells and inverters that convert direct current generated by the solar cells to alternating current. The reactive powers generated by the inverters are based on a reactive power generated by a virtual inverter. The virtual inverter has an equivalent impedance representing the impedances of the inverters in the photovoltaic power plant. The reactive power setpoints of the inverters may be received from a local interpreter. The local interpreter may generate the reactive power setpoints from a global reactive power setpoint generated by a grid controller.
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公开(公告)号：US20160333856A1
公开(公告)日：2016-11-17
申请号：US15105967
申请日：2014-12-17
发明人： Francisco Javier Chivite ZABALZA , Carlos Girones REMIREZ , Ainhoa Carcar MAYOR , Eneko Olea OREGI , Jesus Lopez TABERNA
CPC分类号： F03D9/255 , G05F5/00 , H02H7/06 , H02J3/1807 , H02J3/1835 , H02J3/386 , H02P9/007 , H02P9/102 , H02P9/16 , Y02E10/725 , Y02E10/763 , Y02E40/30
摘要： A wind turbine that includes a housing, an asynchronous generator disposed in the housing and configured to be electrically connected to a power grid connection; a power converter circuit disposed in the housing and configured to be electrically connected to the asynchronous generator; and a variable impedance device disposed in the housing, connected to the generator and configured to limit current by varying impedance in response to a transient current. The wind turbine delivers reactive power to the power grid when the variable impedance device varies impedance in response to the transient current. The variable impedance device can be arranged in series between the asynchronous generator and the power grid connection, or can be in a shunt arrangement between the asynchronous generator and a neural point.
摘要翻译： 一种风力涡轮机，包括壳体，设置在壳体中并被配置为电连接到电网连接的异步发电机; 电源转换器电路，其设置在所述壳体中并且被配置为电连接到所述异步发电机; 以及设置在壳体中的可变阻抗装置，其连接到发电机并且被配置为通过响应于瞬态电流而改变阻抗来限制电流。 当可变阻抗装置响应于瞬态电流改变阻抗时，风力涡轮机向电网输送无功功率。 可变阻抗装置可以串联布置在异步发电机和电网连接之间，或者可以在异步发电机和神经点之间的分流装置中。
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公开(公告)号：US09484833B2
公开(公告)日：2016-11-01
申请号：US14772377
申请日：2013-12-24
申请人： STATE GRID CORPORATION OF CHINA , XUANCHENG POWER SUPPLY COMPANY OF STATE GRID ANHUI ELECTRIC POWER CORPORATION , BEIJING HUA TENG KAI YUAN ELECTRIC COMPANY LIMITED
发明人： Yeru Zhou , Jian Wang , Dongsheng Fu , Xiaoma Jin , Dongsheng Zou , Jin Pan , Yi Song , Jianzhou Cheng , Tianwen Zheng , Jianming Wu , Hongbo Luo
CPC分类号： H02M7/217 , H02J3/01 , H02J3/1807 , H02M7/797 , H02M2007/53876 , Y02E40/30 , Y02E40/40
摘要： The present invention discloses a system and a method for controlling PCS voltage and frequency, wherein the system comprises a reference voltage converter, a phase-locked loop, a grid-side voltage converter, a voltage transformer, a first proportional integral controller, a second proportional integral controller, a coordinate converter and a SVPWM generator; a reference voltage converter is connected to an output terminal of a the phase-locked loop, and the output terminal of the phase-locked loop is further connected to a grid-side voltage converter; the grid-side voltage converter is connected to a high-voltage side of an isolating transformer of the electric grid via the voltage transformer; two output terminals of the grid-side voltage converter are respectively connected to the coordinate converter via two proportional integral controllers; an output terminal of the coordinate converter is connected to the SVPWM generator; an output terminal of the SVPWM generator is connected to a power switch of the electric grid. A PWM control signal for controlling the power switch of the electric grid is generated by the reference voltage converter, the phase-locked loop, the grid-side voltage converter, the voltage transformer, the two proportional integral controllers, the coordinate converter and the SVPWM generator. The system and method for controlling PCS voltage and frequency according to the invention have the advantages that the PCS can realize voltage and frequency buildup in an off-grid state and can stably output an expected voltage and frequency.
摘要翻译： 本发明公开了一种用于控制PCS电压和频率的系统和方法，其中该系统包括参考电压转换器，锁相环，电网侧电压转换器，电压互感器，第一比例积分控制器，第二 比例积分控制器，坐标转换器和SVPWM发生器; 参考电压转换器连接到锁相环的输出端，并且锁相环的输出端进一步连接到电网侧电压转换器; 电网侧电压转换器通过变压器连接到电网隔离变压器的高压侧; 电网侧电压转换器的两个输出端子通过两个比例积分控制器分别连接到坐标转换器; 坐标转换器的输出端子连接到SVPWM发生器; SVPWM发生器的输出端子连接到电网的电源开关。 用于控制电网电源开关的PWM控制信号由参考电压转换器，锁相环，电网侧电压转换器，变压器，两个比例积分控制器，坐标转换器和SVPWM产生 发电机。 根据本发明的用于控制PCS电压和频率的系统和方法具有的优点是PCS可以在离网状态下实现电压和频率积累，并且可以稳定地输出期望的电压和频率。
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27.发明授权Hybrid thyristor-controlled series capacitor and passive damping filter for series capacitors 有权混合晶闸管控制串联电容器和串联电容器的无源阻尼滤波器公开(公告)号：US09467112B2
公开(公告)日：2016-10-11
申请号：US14340891
申请日：2014-07-25
CPC分类号： H03H7/0138 , G05F3/16 , H02J3/1807 , H02J3/24 , Y02E40/14 , Y02E40/30
摘要： Provided is a series capacitor for controlling a flow of power on a transmission line, and includes a filter circuit, and a thyristor-controlled circuit, wherein an interconnection and operation of the filter circuit and the thyristor-controlled circuit are performed based on a coordination of control thereof, to connect to a series capacitor bank on a transmission line.
摘要翻译： 提供一种用于控制传输线上的电力流的串联电容器，并且包括滤波电路和晶闸管控制电路，其中基于协调来执行滤波电路和晶闸管控制电路的互连和操作 的控制，以连接到传输线上的串联电容器组。
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28.发明授权Method for controlling a wind turbine during an asymmetrical grid fault and a wind turbine 有权在不对称电网故障期间控制风力涡轮机的方法和风力涡轮机公开(公告)号：US09461572B2
公开(公告)日：2016-10-04
申请号：US14720510
申请日：2015-05-22
申请人： Nordex Energy GmbH
发明人： Christian Wessels
IPC分类号： F03D9/00 , H02P9/04 , H02P9/00 , H02J3/18 , H02P101/15
CPC分类号： H02P9/007 , F03D9/00 , H02J3/18 , H02J3/1885 , H02P23/26 , H02P2101/15 , Y02E10/763 , Y02E40/30
摘要： The invention is directed to a method for controlling a wind turbine connected to a three-phase electrical supply grid during an asymmetrical grid fault. The method is configured for wind turbines with a doubly-fed induction generator. The reactive current to be fed into the electrical supply grid in the negative phase-sequence system is generated by the line-side and the rotor-side converter in a coordinated manner and depends on the line voltage. The reactive current to be fed into the electrical supply grid is distributed among the rotor-side and line-side converters. As a result, even in the case of severely asymmetrical grid faults, the reactive current to be fed into the electrical supply grid can be provided and excessive loading of the rotor-side converter can be prevented using simple means. The invention is also directed to a wind turbine for performing the above method.
摘要翻译： 本发明涉及一种用于控制在不对称电网故障期间连接到三相电网的风力涡轮机的方法。 该方法被配置为具有双馈感应发电机的风力涡轮机。 在负相序系统中馈送到电网的无功电流由线路侧和转子侧转换器以协调的方式产生，并且取决于线路电压。 馈送到电网的无功电流分布在转子侧和线路侧转换器之间。 结果，即使在严重不对称的电网故障的情况下，也可以提供馈送到电网的无功电流，并且可以使用简单的手段防止转子侧转换器的过载。 本发明还涉及一种用于执行上述方法的风力涡轮机。
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公开(公告)号：US09444254B2
公开(公告)日：2016-09-13
申请号：US13597832
申请日：2012-08-29
申请人： Karl Eric Fender , Clay L. Fellers
发明人： Karl Eric Fender , Clay L. Fellers
CPC分类号： H02J3/1828 , G05F3/18 , G05F3/22 , Y02E40/30
摘要： A boost device is coupled to a compensation device that is configured to be connected to a power system. The boost device includes multiple portions, each of the multiple portions including at least one electrical element, and a solid-state switching device electrically connected to the at least one electrical element. The solid-state switching device is connected in parallel with the at least one electrical element such that closing the solid-state switching substantially prevents current flow to the at least one electrical element.
摘要翻译： 升压装置耦合到被配置为连接到电力系统的补偿装置。 升压装置包括多个部分，每个多个部分包括至少一个电气元件，以及电连接到该至少一个电气元件的固态开关装置。 固态开关装置与至少一个电气元件并联连接，使得关闭固态开关基本上防止电流流向至少一个电气元件。
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公开(公告)号：US20160218639A1
公开(公告)日：2016-07-28
申请号：US14604412
申请日：2015-01-23
IPC分类号： H02M7/797
CPC分类号： H02M7/797 , H02J3/18 , H02M7/53871 , H02M2007/53876 , Y02E40/30
摘要： Systems, methods, and devices for use with active/reactive power control in power conditioning systems. To provide quick active/reactive power control by way of a grid-connected inverter, an estimator estimates the P and Q coefficients based on an instantaneous power from the grid-connected inverter. The estimator receives grid current and voltage and estimates of the P and Q coefficients are used with reference P and Q values to determine whether active or reactive power needs to be injected to the grid. The P coefficient is a DC offset of the instantaneous power of the grid and the Q coefficient is the coefficient of a sine component of the instantaneous power.
摘要翻译： 用于功率调节系统中的有功/无功功率控制的系统，方法和装置。 为了通过并网逆变器提供快速有功/无功功率控制，估计器基于并网逆变器的瞬时功率来估计P和Q系数。 估计器接收电网电流和电压，并使用P和Q系数的估计与参考P和Q值来确定有功或无功功率是否需要注入电网。 P系数是电网的瞬时功率的直流偏移，Q系数是瞬时功率的正弦分量的系数。
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