基于增量因子的后备保护在线整定方法  

Increment Factors Based Online Setting for Backup Protection

作　　者：赵宇[1] 王慧芳[1] 王晓保 何奔腾[1] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]上海轨道交通技术研究中心,上海市徐汇区201103

出　　处：《电网技术》2014年第1期269-274,共6页Power System Technology

基　　金：国家自然科学基金项目(51107112)~~

摘　　要：针对后备保护在线整定难题,结合预整定思想,提出基于增量因子的后备保护在线整定方法。首先,改变故障分析模型的参考电压,推导出分支系数在运行方式变化后的变化倍率表达式,提出了增量因子的概念。然后推导了在电网出现电源类和支路类运行方式变化时增量因子的计算式,提出了增量因子系数的概念。增量因子系数只与原运行方式有关,因此可以预计算。后给出了基于增量因子的后备保护在线预整定和实时定值计算的实现流程,并通过算例验证了所提方法的正确性和计算速度方面的优势。In allusion to the difficulty of online setting of backup protection, combining with the idea of presetting an increment factor based online setting of backup protection is proposed. Firstly, reselecting the reference node in fault analysis network model, the expression of varying magnification of branch coefficient after the change of operating mode is derived and a concept of increment factor is proposed; then the calculation expression of increment factor during the occurrence of change in the operating mode of power source and branches is derived, and a concept of increment factor coefficient is put forward. The increment factor coefficient is only related to original operating mode, so it can be pre-calculated. Finally, the flowcharts to implement the increment factor based online presetting of backup protection and real-time setting calculation are given, and the correctness of the proposed method and its superiority in calculation speed are validated by IEEE RTS-79 24-node network.

关 键 词：后备保护 在线整定 分支系数 增量因子 

分 类 号：TM77[电气工程—电力系统及自动化]