全电流补偿消弧线圈增容改造方案的研究

Research on Capacity-expansion Modification Scheme of Full Current Compensation Arc Suppression Coil

谐振接地方式符合配电网运行对安全性及可靠性的要求,因而发展前景广阔。电容电流和接地残流不断增大的问题可以通过加设小容量传统消弧线圈及全电流补偿消弧线圈的从消弧线圈装置解决。基于全电流补偿消弧线圈的基本工作原理,从主从式的角度给出了适合于分布式安装的全电流补偿消弧线圈的结构及其特性与谐波分析,并对不同安装方式下的装置进行增容改造方案设计并进行仿真分析,仿真结果表明装置采用分布安装能更加有效地降低电容电流和接地残流幅值。

Resonance grounding mode meets the requirements of safety and reliability for power network, and has good prospects of application. The problems that capacitive current and ground residual current increase constantly can be solved through adding the traditional arc suppression coil with small capacity and the slave arc suppression coil device of full current compensation arc suppression coil. Based on the basic principle of full current compen- sation arc suppression coil, this paper proposes the structure of the full current compensation arc suppression coil suitable for distributed installation with master-slave type, and analyzes its structure characteristics and harmonic. The capacity-expansion modification schemes of the full current compensation arc suppression coil with different installation modes are designed, and simulation analyses are conducted. Simulation results show that distributed installation can more effectively reduce the capacitive current and the ground residual current amplitude.