公开(公告)号：US4780660A

公开(公告)日：1988-10-25

申请号：US101021

申请日：1987-09-25

申请人： Seiya Shima ,  Hiromi Inabe ,  Sadao Hokari

发明人： Seiya Shima ,  Hiromi Inabe ,  Sadao Hokari

IPC分类号： G01R19/06 ,  G05F1/70

CPC分类号： G01R19/06

摘要： A first apparatus for determining instantaneous reactive currents to determine instantaneous reactive currents in every phase of a three-phase load. Three phase current signals corresponding, respectively, to phase currents of the three-phase load supplied from a three-phase power-supply source are multiplied with sinusoidal wave signals of three phases, each of which has a phase difference of 90.degree. relative to the corresponding phase voltage of the three-phase power supply source to obtain the products for three phase, respectively, which products are added together to produce a sum signal. The instantaneous reactive currents mentioned above are determined on the basis of the sum signal and the three phase sinusoidal wave signals. A second apparatus for compensating the reactive power of the three-phase load by means of a converter load circuit including a current-source type three phase converter connected in parallel with the three-phase load by making use of the instantaneous reactive currents of the three-phase load determined by the first mentioned apparatus.

摘要翻译： 用于确定瞬时无功​​电流以确定三相负载的每个相中的瞬时无功电流的第一装置。 分别对应于从三相电源供给的三相负载的相电流的三相电流信号与三相正弦波信号相乘，每相具有相对于相位差为90度的相位差 三相电源的对应相电压分别获得三相产品，将这些产品相加在一起产生和信号。 上述瞬时无功电流基于和信号和三相正弦波信号来确定。 一种用于通过转换器负载电路来补偿三相负载的无功功率的第二装置，所述转换器负载电路包括利用三相负载的瞬时无功电流与三相负载并联连接的电流源型三相转换器 由第一个提到的设备确定的相位负载。