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一、前言: 云峰发电厂六十仟伏(分为五十周/秒、六十周秒)是中性点经消弧线圈接地小系统。五十周/秒、系统母线只代有四十三公里的云集线。在六八年以前消弧线圈未投入运行。而六十周/秒向朝鲜供电系统也很小(电容电流也只有十几安),因消弧线圈容量过大,现在仍不能把消弧线圈投入运行。这样系统的容抗和母线上的激磁特性不好(如JCC——110)电压互感器的非线性感抗匹配已进入分频谐振区,一旦系统由于某种因素(操作或者事故)激发时,就有可能使六十仟伏系
I. Preface: The Yunfeng Power Plant 60 仟Volt (divided into 50 cycles/second and 60 cycles per second) is a neutral point arc suppression coil grounding system. Fifty weeks/second, the system buses only have 43 kilometers of gathering lines. The arc suppression coil was not put into operation before 68 years. At 60 weeks/second, the power supply system to North Korea is also very small (capacity current is only about ten amps). Because the capacity of the arc suppression coil is too large, the arc suppression coil cannot be put into operation yet. The capacitive reactance of the system and the excitation characteristics of the busbar are not good (such as JCC-110). The nonlinear inductance matching of the voltage transformer has entered the frequency division resonance area. Once the system is excited by a certain factor (operation or accident), It is possible to make 60