公开(公告)号：US20170133851A1

公开(公告)日：2017-05-11

申请号：US15015225

申请日：2016-02-04

Applicant: Tsinghua University

Inventor： WENCHUAN WU ,  BOMING ZHANG ,  HONGBIN SUN ,  ZHUANG TIAN ,  QINGLAI GUO ,  BIN WANG

IPC: H02J3/38 ,  G05B17/02

CPC classification number: H02J3/381 ,  G05B17/02 ,  G05F1/66 ,  H02J3/06 ,  H02J3/16 ,  H02J3/1828 ,  H02J3/1835 ,  H02J3/1878 ,  H02J3/48 ,  H02J3/50 ,  H02J2003/007 ,  Y02E40/34 ,  Y02E40/76 ,  Y02E60/76 ,  Y04S10/545 ,  Y04S40/22

Abstract: The present disclosure provides a method and a device for controlling an active distribution network, relating to the field of power system operation and control technology. The method includes: creating a power loss objective function; determining first power flow equations; obtaining second power flow equations by performing linearization on the first power flow equations; determining a sub-scale adjustment model of a transformer; obtaining a linearized model of the transformer by performing linearization on the sub-scale adjustment model; obtaining control parameters by solving the power loss objective function according to the second power flow equations, the linearized model of the transformer, an operation constraint of the continuous reactive power compensator, an operation constraint of the grouping switching capacitor, an operation constraint of the distributed generator and a safety operation constraint in the active distribution network, such that the active distribution network is controlled by the obtained parameters to minimize power loss.

公开(公告)号：US20170070135A1

公开(公告)日：2017-03-09

申请号：US15066960

申请日：2016-03-10

Applicant: LSIS CO., LTD.

Inventor： Tae Sik NAM

IPC: H02M1/42

CPC classification number: H02M1/4208 ,  H02J3/16 ,  H02J3/1828 ,  Y02E40/12 ,  Y02E40/34

Abstract: A static Voltage Ampere Voltage Reactive (VAR) comparator including: a plurality of capacitors being in a Y-connected structure and supplying three-phase alternating current power according to a switching operation; a plurality of bidirectional thyristors connected to the plurality of capacitors in serial to open and close the plurality of capacitors; and a controller, in response to power applied to the static VAR compensator, periodically applying a firing pulse signal to the plurality of bidirectional thyristors reaching to a voltage phase on which a transient current is minimized, wherein, at a point in time when first applying the firing pulse signal to one bidirectional thyristor, the controller applies simultaneously applies the firing pulse signal to the one bidirectional thyristor and other remaining bidirectional thyristors allowing a current to flow on three phases.

Abstract translation: 一种静态电压安培电压无功（VAR）比较器，包括：多个电容器为Y形结构，并根据开关操作提供三相交流电; 多个双向晶闸管串联连接到多个电容器以打开和闭合多个电容器; 以及控制器，响应于施加到所述静态VAR补偿器的功率，周期性地向所述多个双向晶闸管施加触发脉冲信号，所述多个双向晶闸管达到瞬态电流最小化的电压相位，其中，在第一次施加的时间点 触发脉冲信号到一个双向晶闸管，控制器同时向一个双向晶闸管和其他剩余的双向晶闸管施加点火脉冲信号，允许电流在三相上流动。

公开(公告)号：US20170040799A1

公开(公告)日：2017-02-09

申请号：US15331737

申请日：2016-10-21

Applicant: Varentec, Inc.

Inventor： DEEPAKRAJ Divan ,  ROHIT MOGHE

IPC: H02J3/12 ,  G05F1/66

CPC classification number: H02J3/12 ,  G05F1/66 ,  H02J3/1828 ,  Y02E40/30

Abstract: Systems and methods for controlling grid voltage include a distribution power network and one or more smart inverters at or near the edge of the distribution power network, each smart inverter configured to absorb or insert VARs to control the voltage based on a reference Q value, wherein the reference Q value is calculated by a reference Q calculator. A reference Q calculator includes a processor and a non-transitory computer readable memory with software embedded thereon, the software configured to cause the processor to receive a voltage measurement taken at or near the edge of a power distribution grid, a voltage band value, and a voltage set point value, determine a difference, ev, between the voltage measurement and the voltage set point, generate a new reference Q value if an absolute value of ev is greater than the voltage band value, and cause the smart inverter to either absorb or insert VARs depending on the sign of ev.

Abstract translation: 用于控制电网电压的系统和方法包括在配电网络边缘处或附近的分配电力网络和一个或多个智能逆变器，每个智能逆变器被配置为吸收或插入VAR以基于参考Q值来控制电压，其中 参考Q值由参考Q计算器计算。 参考Q计算器包括处理器和嵌入其中的软件的非暂时性计算机可读存储器，所述软件被配置为使处理器接收在配电网边缘处或附近的电压测量，电压带值和 电压设定值，确定电压测量和电压设定点之间的差值ev，如果ev的绝对值大于电压带值，则产生新的参考Q值，并使智能逆变器吸收 或根据ev的符号插入VAR。

公开(公告)号：US09331566B1

公开(公告)日：2016-05-03

申请号：US14723108

申请日：2015-05-27

Applicant: Adaptive Frequency Holdings, LLC

Inventor： Aziz Banayan ,  Cheng-pin Liu ,  Robert White ,  John Flavin

IPC: H02M1/42 ,  H02M1/44

CPC classification number: H02M5/4585 ,  H02J3/1828 ,  H02J3/383 ,  H02M1/10 ,  H02M1/126 ,  H02M7/48 ,  Y02E10/563 ,  Y02E40/30

Abstract: An adaptive AC power exchanger generates stable 120 VAC 60 Hz power from variable grid input power nominally at 220 VAC and 50 Hz. The exchanger includes an AC-DC circuit stage coupled to receive the input AC current and generate a VDC output, and a DC-AC circuit stage to generate power for a load. The AC-DC stage includes an EMI filter and surge protection circuit, a 50 Hz rectifier and a power factor correction (PFC) circuit controlled by a PFC controller to yield a 400 VDC output coupled through a bulk capacitor stack to a common connection to generate a 200 VDC voltage node. The 200 VDC and 400 VDC voltages are coupled to the DC-AC circuit including a pulse width modulator; current load limiter; an LC filter having a capacitor, dual inductors and an inductor by-pass relay; and a load disconnect relay all controlled by an AC bridge controller.

Abstract translation: 自适应交流电源交换机可以从220 VAC和50 Hz标称的可变电网输入功率产生稳定的120 VAC 60 Hz功率。 交换机包括AC-DC电路级，其耦合以接收输入AC电流并产生VDC输出，以及DC-AC电路级以为负载产生电力。 AC-DC级包括EMI滤波器和浪涌保护电路，由PFC控制器控制的50Hz整流器和功率因数校正（PFC）电路，以产生通过大容量电容器堆叠耦合到公共连接的400VDC输出，以产生 一个200 VDC电压节点。 200VDC和400VDC电压耦合到包括脉冲宽度调制器的DC-AC电路; 电流限制器; 具有电容器，双电感器和电感器旁路继电器的LC滤波器; 和负载断路继电器全部由交流电桥控制器控制。

公开(公告)号：US09331482B2

公开(公告)日：2016-05-03

申请号：US14071130

申请日：2013-11-04

Applicant: North Carolina State University

Inventor： Qin Huang

IPC: G05F1/70 ,  H02J3/18

CPC classification number: H02J3/1828 ,  H02J3/1842 ,  Y02E40/16 ,  Y02E40/22

Abstract: Static synchronous compensator (STATCOM) systems and methods are disclosed. An example STATCOM system includes a reactive component configured for electrical connection to a power network. For example, the reactive component may be a capacitor bank. The system also includes an inductor electrically connected in series with the reactive component. Further, the system includes a converter electrically connected in series with the reactive component and the inductor. A method may include using the static synchronous compensator system to provide one of reactive power and active power to the power network.

Abstract translation: 公开了静态同步补偿器（STATCOM）系统和方法。 示例STATCOM系统包括被配置用于电连接到电力网络的无功部件。 例如，无功分量可以是电容器组。 该系统还包括与无功部件串联电连接的电感器。 此外，该系统包括与无功部件和电感器串联电连接的转换器。 一种方法可以包括使用静态同步补偿器系统来向电力网络提供无功功率和有功功率之一。

公开(公告)号：US20160036231A1

公开(公告)日：2016-02-04

申请号：US14630829

申请日：2015-02-25

Applicant: Smart Wire Inc.

Inventor： Stewart Ramsay ,  Frances Bell

IPC: H02J3/20 ,  H02J3/24 ,  G05F1/70

CPC classification number: H02J3/20 ,  G05F1/70 ,  H02J3/1828 ,  H02J3/24 ,  Y02E40/30

Abstract: The disclosure is generally directed to reactance modules or DSRs (30) that may be mounted on a power transmission line (16) of a power transmission system (400). A DSR (30) may be configured in a bypass mode or in an injection mode (where reactance is injected into the corresponding line (16)). Multiple DSRs (30) installed on a power line section (18) define an array (410) and have a dedicated controller (440). Such an array (410) and controller (440) may be installed on a number of different power line sections (18). The controller (440) for each array (410) may communicate with a DSR server (420), which in turn may communicate with a utility-side control system (430). Each DSR (30) may incorporate one or more features directed to core (50) configurations and assembly, communications, modal configuration control, fault protection, EMI shielding, DSR (30) assembly, and DSR (30) installation.

Abstract translation: 本公开一般涉及可以安装在电力传输系统（400）的输电线路（16）上的电抗模块（DSR）（30）。 DSR（30）可以被配置为旁路模式或注入模式（其中电抗被注入相应的线（16））。 安装在电力线部分（18）上的多个DSR（30）限定阵列（410）并具有专用控制器（440）。 这种阵列（410）和控制器（440）可以安装在多个不同的电力线路部分（18）上。 每个阵列（410）的控制器（440）可以与DSR服务器（420）通信，DSR服务器又可以与公用事业侧控制系统（430）进行通信。 每个DSR（30）可以包括针对核心（50）配置和组装，通信，模态配置控制，故障保护，EMI屏蔽，DSR（30）组装和DSR（30）安装的一个或多个特征。

公开(公告)号：US08792216B2

公开(公告)日：2014-07-29

申请号：US13743005

申请日：2013-01-16

Applicant: Zoran Gajic

Inventor： Zoran Gajic

IPC: H02H7/16

CPC classification number: H02H7/16 ,  H02J3/1828 ,  Y02E40/30

Abstract: A method for protecting against a failure within a multi-phase capacitor bank including a plurality of capacitor units each including a plurality of capacitor elements connected to each other, wherein capacitor units are connected to each other and the failure may involve two neighboring capacitor units. The method includes steps of measuring the current of each individual phase of the capacitor bank, calculating the magnitude of an unbalanced current based on the measured currents, measuring the voltage of each individual phase of the capacitor bank, calculating the magnitude of an unbalanced voltage based on the measured voltages, determining an operating point based on the calculated magnitudes of the unbalanced current and the unbalanced voltage, examining where the defined operating point is located in a specified operating region, and initializing a trip signal based on the location of the defined operating point in the specified operating region.

Abstract translation: 一种用于防止在多相电容器组中的故障的方法，包括多个电容器单元，每个电容器单元包括彼此连接的多个电容器元件，其中电容器单元彼此连接，并且故障可能涉及两个相邻的电容器单元。 该方法包括以下步骤：测量电容器组的每个单相的电流，基于测量的电流计算不平衡电流的大小，测量电容器组的每个相的电压，计算不平衡电压的幅度 在测量的电压上，基于计算出的不平衡电流的大小和不平衡电压来确定工作点，检查定义的工作点位于指定的工作区域中的位置，以及基于所定义的工作的位置初始化跳闸信号 指向指定的操作区域。

公开(公告)号：US08717061B2

公开(公告)日：2014-05-06

申请号：US13100333

申请日：2011-05-04

Applicant: Ricardo C. Limpin ,  Lilibeth S. Mediavillo ,  Angel Vicente G. Arcilla

Inventor： Ricardo C. Limpin ,  Lilibeth S. Mediavillo ,  Angel Vicente G. Arcilla

IPC: G01R31/34

CPC classification number: H02J3/1828 ,  G01R31/343

Abstract: An apparatus designed to accurately measure the capacitance required in order to optimize the power factor of single phase and three phase induction motors. Capacitor circuits are interruptably connected to the busses by means of push-button switches. Leads electrically connected to the busses are attached to a calculator unit which is, in turn, electrically connected to the load leads. The calculator unit displays in digital figures the actual operating conditions of an induction motor and the capacitance required for power factor optimization. The correct capacitance required to increase power factor in the 99% to 100% range is determined by either: (1) pushing a switch or a combination of switches, or (2) pushing the automatic mapping switch.

Abstract translation: 设计用于精确测量所需电容以便优化单相和三相感应电机的功率因数的装置。 电容电路通过按钮开关中断连接到总线。 电连接到总线的引线被附接到计算器单元，计算器单元进而电连接到负载引线。 计算器单元以数字图形显示感应电动机的实际工作条件和功率因数优化所需的电容。 在99％至100％范围内增加功率因数所需的正确电容由以下两项决定：（1）按开关或开关组合，或（2）推动自动测绘开关。

公开(公告)号：US08653685B2

公开(公告)日：2014-02-18

申请号：US13701557

申请日：2011-05-31

Applicant: Jorge Martinez Garcia

Inventor： Jorge Martinez Garcia

IPC: F03D9/00 ,  H02P9/04 ,  G05F5/00 ,  G05D3/12

CPC classification number: H02P9/00 ,  H02J3/1828 ,  H02J3/1842 ,  H02J3/386 ,  H02P9/007 ,  H02P2101/15 ,  Y02E10/763 ,  Y02E40/22 ,  Y02E40/30

Abstract: The present invention relates to a control system and an associated method for controlling an amount of reactive power delivered from a wind power plant to an associated power supply grid, the control system comprising a wind power plant controller and a number of wind turbine controllers each being in communication with said wind power plant controller, wherein the wind power plant controller is adapted to provide a grid voltage reference in response to a required total amount of reactive power to at least one wind turbine controller and operating a Switched Capacitor bank.

Abstract translation: 本发明涉及一种控制系统和相关方法，用于控制从风力发电厂输送到相关电力电网的无功功率量，该控制系统包括风力发电厂控制器和多个风力涡轮机控制器，每个风力发电机组 与所述风力发电厂控制器通信，其中所述风力发电厂控制器适于响应于至少一个风力涡轮机控制器的所需无功功率总量并且操作开关电容器组来提供电网电压基准。

公开(公告)号：US08648576B2

公开(公告)日：2014-02-11

申请号：US13167926

申请日：2011-06-24

Applicant: Akihiro Matsuda ,  Yoshiyuki Kono ,  Masatoshi Takeda

Inventor： Akihiro Matsuda ,  Yoshiyuki Kono ,  Masatoshi Takeda

IPC: G05F1/70

CPC classification number: H02J3/1828 ,  H02J3/1878 ,  Y02E40/12 ,  Y10T307/669

Abstract: A first SVC is connected to a first bus. A first SVC control unit controls the first SVC. A first fluctuation-component-voltage generating unit includes a voltage reference circuit that outputs a voltage reference value. A second SVC is connected to a second bus. A second SVC control unit controls the second SVC. A second fluctuation-component-voltage generating unit includes a first-order-lag control block with limiter that generates a comparative voltage that follows a bus voltage of the second bus with a predetermined time lag characteristic and is limited within a predetermined range. An impedance value XS1 of slope reactance of the first SVC is set smaller than impedance value XS2 of slope reactance of the second SVC.

Abstract translation: 第一个SVC连接到第一个总线。 第一SVC控制单元控制第一SVC。 第一波动分量电压产生单元包括输出电压基准值的电压基准电路。 第二SVC连接到第二总线。 第二SVC控制单元控制第二SVC。 第二波动分量电压产生单元包括具有限制器的一阶滞后控制块，其产生具有预定时间滞后特性并遵循第二总线的总线电压的比较电压并被限制在预定范围内。 将第一SVC的斜率电抗的阻抗值XS1设定为小于第二SVC的斜率电抗的阻抗值XS2。