考虑分布式发电并网的配电网自适应保护系统

Adaptive Protection System for Distribution Network Considering Grid Connection of Distributed Generation

为进一步提高考虑分布式发电并网的配电网自适应保护的速动性,提出一种考虑分布式发电并网的配电网自适应保护系统,该系统通过改进微遗传算法实时优化和更新保护继电器的设置。为验证所提出的自适应保护系统的有效性,通过Simulink/MATLAB平台对包含多个故障案例的仿真搭建仿真数据库,并将所提出的自适应保护系统与其他2种配电网自适应保护系统对仿真数据库中故障线路切除效果进行对比。对比结果表明,通过所提出的自适应保护系统得到的故障线路切除速度明显优快于其他2种配电网自适应保护系统。

To further improve the rapidness of adaptive protection of distribution network considering distributed generation grid connection,an adaptive protection system for distribution network considering distributed generation grid connection is proposed.The improved microgenetic algorithm is utilized to optimize and update the settings of protective relays in real time.In order to verify the effectiveness of the proposed adaptive protection system,a simulation database is built by Simulink/MATLAB platform for the simulation of multiple fault cases.The effect of the proposed adaptive protection system on fault line removal in the simula⁃tion database is compared with that of other two adaptive protection systems.The comparison results show that the fault line re⁃moval speeds obtained by the proposed adaptive protection system are significantly faster than those obtained by the other two adaptive protection systems.