摘要
反时限电流保护存在的时间-电流非线性关系和小输入电流时动作时间较长的缺陷,导致其整定复杂,可能影响到保护动作的速动性,也不便于和其他保护配合。文中提出一种新型的时间-电流函数,适用于微机型反时限电流保护,讨论了该新特性的特点,给出了保护之间的整定配合原则,分析表明应用新特性的反时限微机电流保护易于实现保护之间的配合,且动作时限短。
The complex setting of the inverse time overcurrent relay protection is caused by the non-linearization of time-current characteristic and long operation time with low input current, which makes it hard for the protection to coordinate with other kinds of protection. This paper proposes a new time-current function suitable for the microcomputer-based inverse time overcurrent relay protection. The speciality of the new characteristic is addressed in the paper. The approach to calculate the threshold value of relay and how to use this inverse time overcurrent relay protection to coordinate with other kinds of protection are discussed. It is demonstrated that the protection with the new time-current characteristic can easily coordinate with other protections and has short operation time.
出处
《电力系统自动化》
EI
CSCD
北大核心
2003年第23期71-73,85,共4页
Automation of Electric Power Systems
基金
国家自然科学基金(69774024)
