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OPTIMAL CONDITIONS FOR CONTROLLED SWITCHING OF A THREE-PHASE SHUNT REACTOR

机译:三相顺声反应器控制切换的最佳条件

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The switching of shunt reactors in an electrical network is in many cases accompanied by reignition of the arc in the circuit breaker and the occurrence of dangerous overvoltage in the network. To limit such overvoltage, controlled-switching devices are used to switch off the reactor in the optimal phase of the current. To select the optimal switching conditions, the switching processes are analyzed, taking into account the intuitively clear difference between the switching conditions for three-phase and single-phase shunt reactors due to the electrical and/or magnetic coupling between the phase windings. The proposed method of analysis is universal for all types of three-phase shunt reactors due to the use of a universal four-legged star equivalent circuit. The reactor phases are switched off, synchronized against the phase A voltage curve, in the sequence A → C → B to minimize the total switching time.
机译:在电气网络中切换并联反应器在许多情况下,伴随着断路器中的弧的弧度和网络中的危险过电压的发生。 为了限制这样的过电压,使用控制切换装置用于在电流的最佳相位中关闭电抗器。 为了选择最佳的开关条件,分析开关过程,考虑到由于相绕组之间的电和/或磁耦合而在三相和单相分机反应器的开关条件之间的直观清晰的差异。 所提出的分析方法是由于使用通用的四腿星等效电路,所有类型的三相分流反应器是通用的。 在序列A→C→B中,反应器相靠近相位电压曲线同步,以最小化总切换时间。

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