配电网电容电流超标问题研究

为了准确有效地解决当前配电网电容电流超标问题，针对10 kV不接地系统，提出一种分散固定和集中跟踪相结合的无功补偿方法。利用数据实例和数理统计方法分析了当前运行配电网电容电流与常规无功补偿的问题，并给出分散固定与集中跟踪解决方案。利用Matlab/Simulink对该方案进行仿真校验。仿真结果表明，分散固定补偿与集中跟踪补偿相结合的方法对治理10 kV不接地系统电容电流超标问题是有效和实用的。同时，该方案对规划设计中的变电站和10 kV开闭所在无功配置方面具有一定的指导意义。

Research on problems of excessive capacitive current in distribution network

In order to accurately and effectively solve the problem of capacitive current exceeding the standard in the current distribution network, this paper proposes a combining reactive compensation method of distributed fixed and centralized tracking for the 10 kV ungrounded system. The problem of capacitive current and conventional reactive compensation is analyzed by using data instance and mathematical statistics method, and the solution of decentralized fixed and centralized tracking is given. Using the method of Matlab/Simulink to simulate the solution, the results show that the proposed method is effective and practical for solving the problem of capacitance current exceeding 10 kV ungrounded system by using the combination of distributed fixed compensation and centralized tracking compensation. Meanwhile, this scheme has a certain significance to the planning and design of the substation, and the reactive power configuration of 10 kV opening and closing station.