The reactive power compensation is an important engineering in the power system . the active reactive power compensator designed in this text takes the instantaneous reactive power theory of three - phase as foundation , and is formed by the reactive current testing circuit , current tracking control circuit and the main circuit , and among them the current tracking control circuit is formed by instruction current arithmetic circuit , current polarity checkout circuit and current tracking control logic circuit three parts in the circuit form 無功功率補償是電力系統中的一項重要工程,本文所設計的有源無功功率補償器是以三相瞬時無功功率理論為基礎的,它由無功電流檢測電路、電流跟蹤控制電路和主電路三大部分組成,其中電流跟蹤控制電路由指令電流運算電路、電流極性檢測電路和電流跟蹤控制邏輯電路三部分構成。