摘要
对基于故障分量能量函数的超高速方向保护原理进行了研究，探讨了超高速保护的研究思路与方法。认为超高速保护的原理全部用集中参数等值电路来分析不适宜，因为实际的电网用集中参数等值电路不能较好地分析它在故障初期的动态行为。在高压线路超高速保护的研究中，采用时域分析与频域分析相结合的分析方法较好，系统模型则应适当考虑电力系统非线性的影响。
The principle of the ultra-high-speed directional protection based on the energy function of the fault component is analyzed.It is pointed out that the lumped parameter equivalence circuit,is unsuitable for analysis of the ultra-high-speed relaying because the transient performance during initial period of fault in a practical power system can not be represented well with the lumped parameter equivalence circuit.So time-domain analysis and frequency-domain analysis should be preferred in the course of the ultra-high-speed protection studies.The distributed parameter model should be adopted.The influence for the non-linearity of power system should be considered reasonably in the system model.The analysis of energy directional protection can be divided into three periods:The first period is that the performance of the protection corresponds to the directional protection based on travelling waves.After a half fundamental period,it is the power directional protection.In the middle period,the trip of the protection should be deliberative.
出处
《电力系统自动化》
EI
CSCD
北大核心
1999年第14期17-20,28,共5页
Automation of Electric Power Systems
关键词
能量方向保护
电力系统
继电保护
线路保护
directional relay transient energy function fault component distributed parameter circuit
