Volt/var switch plan
    34.
    发明专利
    Volt/var switch plan 有权
    VOLT / VAR开关计划

    公开(公告)号:JP2012228171A

    公开(公告)日:2012-11-15

    申请号:JP2012093497

    申请日:2012-04-17

    CPC classification number: H02J3/18 H02J2003/007 Y02E40/30 Y02E60/76 Y04S40/22

    Abstract: PROBLEM TO BE SOLVED: To provide systems and methods for improving performance of a power distribution system.SOLUTION: A power distribution system 100 includes at least one power distribution device 102 and a computer 116 coupled to the power distribution device. The computer includes a memory area 120 configured to store a hierarchy of the power distribution device. The computer is configured to adjust a first voltage level of a first power distribution device which is a first tier of the hierarchy, and adjust at least a second voltage level of at least a second power distribution device which is a second tier of the hierarchy. The computer is also configured to generate a switch plan for the power distribution device based on the adjusted first voltage level and the adjusted at least a second voltage level.

    Abstract translation: 要解决的问题:提供用于提高配电系统性能的系统和方法。 配电系统100包括耦合到配电装置的至少一个配电装置102和计算机116。 计算机包括被配置为存储配电装置的层级的存储区域120。 计算机被配置为调整作为层级的第一层的第一配电装置的第一电压电平,并且调整作为该层级的第二层的至少第二配电装置的至少第二电压电平。 计算机还被配置为基于经调整的第一电压电平和调整的至少第二电压电平来产生配电装置的开关计划。 版权所有(C)2013,JPO&INPIT

    Control device for reactive power compensation device
    36.
    发明专利
    Control device for reactive power compensation device 有权
    用于电力补偿装置的控制装置

    公开(公告)号:JP2011257894A

    公开(公告)日:2011-12-22

    申请号:JP2010130603

    申请日:2010-06-08

    CPC classification number: H02J3/18 H02J2003/002 Y02E40/30

    Abstract: PROBLEM TO BE SOLVED: To suppress voltage flicker and to compensate reduced power factor.SOLUTION: A control device comprises: a reactive power detection circuit 10; a firing angle control circuit 12; reactive power compensation device models 141-143 and system models 151-153 for generating plural system voltages based on plural firing angles generated from reactive power of a load; a selection circuit 17 that selects an optimum compensation gain K in which flicker voltage is minimum; and a gain multiplier 11 that adjusts the output of the reactive power detection circuit 10 using the gain K. The control device further comprises: a separation calculator 21 that separates the reactive power into a fixed portion and a variable portion; gain multipliers 111-113 that multiply the variable portion by the plural gains; and adders 221-223 that add the fixed portion to the multiplication result. An optimum compensation gain K is calculated based on plural firing angles α-αgenerated from the outputs of the adders 221-223, a multiplication result of the gain K and the variable portion is added to the fixed portion, and the result is input to the firing angle control circuit 12.

    Abstract translation: 要解决的问题:抑制电压闪烁并补偿降低的功率因数。 解决方案:控制装置包括:无功功率检测电路10; 触发角控制电路12; 基于由负载的无功功率产生的多个触发角度来产生多个系统电压的无功补偿装置型号141-143和系统型号151-153; 选择电路17,其选择闪烁电压最小的最佳补偿增益K; 以及增益乘法器11,其使用增益K调整无功功率检测电路10的输出。控制装置还包括:分离计算器21,其将无功功率分离成固定部分和可变部分; 增益乘法器111-113,其将可变部分乘以多个增益; 以及将固定部分添加到乘法结果的加法器221-223。 基于从加法器221-的输出产生的多个触发角α 1 3 来计算最佳补偿增益K, 如图223所示,将增益K和可变部分的相乘结果相加到固定部分,并将结果输入到点火角控制电路12.版权所有:(C)2012,JPO&INPIT

    Power system protection equipment
    37.
    发明专利

    公开(公告)号:JP4252597B2

    公开(公告)日:2009-04-08

    申请号:JP2006510865

    申请日:2004-03-16

    CPC classification number: H02J3/18 Y02E40/30 Y10T307/461

    Abstract: A power system protection system for preventing a voltage drop resulting from the reactive power characteristic of a power system. A main device for acquiring a system electric quantity of one or a plurality of upper substations detects a voltage drop resulting from the reactive power characteristic of the power system and transmits a detection signal of the voltage drop to a terminal device for acquiring a system electric quantity of one or a plurality of lower substations. Each terminal device sequentially sheds loads starting from those suffering more from the influence of the voltage drop resulting from the reactive power characteristic based on the load voltage and load current of a load bus.

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