摘要
目前直流输电工程中运行的继电保护装置对运行人员而言往往只是个黑盒子,当系统发生故障时,只能给出保护的动作结果,这对于故障分析、保护配置与整定等十分不利。选取合适的仿真平台建立直流保护系统的模型,以定量查看保护内部动作过程,分析保护的动作特性,具有重要意义。基于PSCAD/EMTDC仿真平台,建立了高压直流输电继电保护系统的模型和仿真环境,通过读入现场故障录波数据,再现故障过程和保护动作过程。最后结合一起实际直流保护误动作事故进行了仿真分析,为保护算法的改进提供了依据。
When a fault occurs,HVDC(High Voltage Direct Current) operators can only get the final acting information of the protection system,which is just a black box to the operators.This situation is obviously not conducive to HVDC protection setting calculating,sensitivity analyzing,protection configuring etc.In order to solve this problem,selecting a proper simulation environment and establish the simulation model of the protection system to get the inner information is of momentous significance.This paper comprehensively analyzes the method and key points of HVDC protection modeling in PACAD/EMTDC,and gives out the read-in method of fault recorded data to the established model.At last,an HVDC protection misoperating event is analyszed utilizing the protection model.Relevant reults afford a basis to the protection algorithm improvement.
出处
《机电工程技术》
2011年第12期42-45,共4页
Mechanical & Electrical Engineering Technology
基金
国家自然科学基金项目(编号:51077055)