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Recovery voltage study of capacitor bank switching for 150kV electrical system in Indonesia

机译：印度尼西亚150kV电力系统电容器组投切恢复电压的研究

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In Indonesia, there are many capacitor bank installed to regulate the nominal voltage. Currently, the Recovery Voltage (RV) data related to the capacitor bank switching is unavailable, whereas this data is very important to analyze Circuit Breaker (CB) performance to understand whether it will success to interrupt the current or not. In addition, if the CB cannot retain the RV, it will degrade the CB contacts and possible to broke the CB. Therefore, this paper presents the study of RV for 150kV electrical system in Indonesia. The Result showed that the RV is affected by the source impedance value. Furthermore, for normal condition, the value of RV on the CB for capacitor bank with neutral grounded or ungrounded remains within the limits permitted by the standard. However, in the short-circuit condition, the Transient Recovery Voltage (TRV) and Rate of Rise of Recovery Voltage (RRRV) values can exceed the standard values. This TRV problem can be solved by grounding the capacitor bank. Meanwhile, RRRV problems can be handled by installed a surge capacitor that mounted and arranged in parallel (phase to neutral) to the CB.
机译：在印度尼西亚，安装了许多电容器组以调节标称电压。当前，尚无与电容器组开关相关的恢复电压（RV）数据，而该数据对于分析断路器（CB）的性能以了解其是否能够成功中断电流非常重要。此外，如果CB无法保留RV，则会使CB触点退化并可能损坏CB。因此，本文提出了对印度尼西亚150kV电力系统RV的研究。结果表明，RV受源阻抗值的影响。此外，在正常情况下，中性点接地或不接地的电容器组在CB上的RV值仍在标准允许的范围内。但是，在短路条件下，瞬态恢复电压（TRV）和恢复电压上升率（RRRV）值可能会超过标准值。可以通过将电容器组接地来解决这个TRV问题。同时，可通过安装与CB并联（相线至中性线）安装和布置的浪涌电容器来解决RRRV问题。

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