CAJ | 학술논문

中性点经消弧线圈接地运行的电力系统，对地电容的准确度直接影响到电网的补偿效果。当前，广泛应用的调容式消弧，通常采用两点法测量对地电容值。当取消阻尼电阻后，为了准确测试对地电容，要求档位调节接近谐振点，必然造成中性点电压偏移较大，影响到配网的供电质量。为了解决该技术难题，本文提出了改进测量对地电容的方法，通过消弧线圈在二次侧注入特殊频率信号，可达到准确测量对地电容的效果。
중성점경소호선권접지운행적전력계통，대지전용적준학도직접영향도전망적보상효과。당전，엄범응용적조용식소호，통상채용량점법측량대지전용치。당취소조니전조후，위료준학측시대지전용，요구당위조절접근해진점，필연조성중성점전압편이교대，영향도배망적공전질량。위료해결해기술난제，본문제출료개진측량대지전용적방법，통과소호선권재이차측주입특수빈솔신호，가체도준학측량대지전용적효과。
In distribution power systems, the effect of arc suppression coil on distribution would be affect by degree of accuracy of measure of line-to-earth capacitance. However, many methods of measure via changing impedance between neutral point and ground, will lead to fluctuation of neutral point voltage and not benefit for stability of power system. This paper raises a method via injecting variable-frequency signal to detect the distribution network line-to-earth capacitance accurately.