配电网中分布式电源的选址定容和电流保护策略

发布时间：2018-06-10 19:24

本文选题：逆变型分布式电源 + 选址定容　；参考：《电力系统自动化》2014年10期

【摘要】：反时限过电流保护常用于配电网的线路保护,而不同容量的分布式电源接入配电网的不同馈线不同区段时,会对原有配电网的继电保护及安全运行产生很大的影响。文中分析了逆变型分布式电源对传统反时限过电流保护的配合特性和动作行为的影响,给出了基于反时限过电流保护的选址定容方法并指出其局限性。在此基础上,研究了故障限流器在电网故障时呈现的高阻抗特性,提出了一种基于故障限流器的含分布式电源的配电网保护策略,并结合福建省湄洲岛储能电站实例,建立PSCAD仿真模型,进行计算验证。仿真结果表明,所述方法能够有效降低逆变型分布式电源对反时限过电流保护的影响,使配电网线路的保护具有良好的协调性,保证配电网的稳定运行。
[Abstract]:Reverse time over-current protection is often used in distribution network line protection, but when different capacity of distributed power source is connected to different feeder and different section of distribution network, it will have a great influence on the relay protection and safe operation of the original distribution network. In this paper, the influence of inverter distributed generation on the coordination characteristics and action behavior of the traditional inverse time overcurrent protection is analyzed, and the location and capacity determination method based on the inverse time over current protection is presented and its limitations are pointed out. On this basis, the high impedance characteristic of fault current limiter in power network fault is studied, and a distribution network protection strategy with distributed power supply based on fault current limiter is proposed, and the example of Meizhou Island energy storage power station in Fujian Province is given. The simulation model of PSCAD is established and verified by calculation. The simulation results show that the proposed method can effectively reduce the influence of inverter distributed generation on inverse time-limited over-current protection, make the protection of distribution network have good coordination, and ensure the stable operation of distribution network.
【作者单位】：上海交通大学电子信息与电气工程学院;福建省电力试验研究院系统所;中国电力科学研究院电工与新材料研究所;
【分类号】：TM77

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