A New Measurement Technology of Grounded Capacitance Parameters of the Distribution Network Lines Based on Resonance Method

摘要

Precise measurement of distribution capacitance to ground is always a hot topics discussed by distribution system researchers. Under the certain circumstances, the value of the arc suppression coil value is unknown in distribution network and the grounded parameters cannot be effectively measured by the existing methods. Based on the production of our research group, a new method for grounded capacitance measurement of the distribution network is proposed when the value of arc suppression coil is unknown. In medium and low-voltage distribution network systems of China, the neutral point is commonly used as the arc suppression coil grounding method. Therefore, the accurate and rapid measurement of the grounded capacitance is necessary. After PSCAD and MATLAB joint simulation analysis, experimental verification and the reliability of this method are proved. The measuring process is performed on the secondary side and it does not affect the normal operation of the primary side.