工频变化量距离继电器的统一表达方式  

UNIFIED EXPRESSION OF FAULT-COMPONENT DISTANCE RELAY

作　　者：刘世明[1] 林湘宁[1] 杨春明[1] 

机构地区：[1]烟台东方电子信息产业股份有限公司,山东省烟台市264000

出　　处：《电网技术》2002年第5期23-27,共5页Power System Technology

摘　　要：工频变化量距离继电器具有良好的性能 ,但是在其应用中也需要注意一些问题。作者在分析已提出的几种工频变化量距离继电器判据的基础上 ,推导出它们的统一参数表达式 ,以及参数取值与几种继电器之间的对应关系 ,并给出了参数的取值范围。在取值范围内 ,还可以得出一系列相似的继电器。基于统一参数表达式 ,分析了这一类工频变化量距离继电器的动作特性 ,以及在灵敏度和抗干扰能力上的渐近关系。经过分析后指出 ,在一定的负荷条件下 ,工频变化量距离继电器有可能出现稳态超越问题。为保证继电器不出现稳态超越 ,给出了参数取值与系统工况之间的约束关系。在此基础上 ,提出了一种根据系统运行工况 ,自动调整参数取值的自适应工频变化量距离继电器方案。The fault component based distance relays possess good characters, but some attentions should be paid when they are applied. Three types of fault component based distance relays have been studied so far, they are phase-comparing relay, amplitude-comparing relay and reactance relay. On the basis of analyzing the criteria for these relays, their unified expression, the corresponding relation between the determination of parameter values of these relays are deduced, and the ranges for determining the parameter values are given. Changing the values of the parameters in the expression within the value ranges other fault component based relays similar to the above mentioned relays can be gained. Based on the unified expression the action characteristics of these kinds of relays and the asymptotic relation between the sensitivity and anti-interference ability are analyzed. Analysis on the characteristics of this kind of relays based on the unified expression shows that due to the architecture of this kind of relays, the overreach may occur under a certain load.To prevent this phenomenon the constraint for how to choose the parameter according to the system load is studied, and a new kind of self-adaption fault component based distance relay is proposed.

关 键 词：电力系统 继电保护 工频变化 继电器 统一表达方式 

分 类 号：TM588[电气工程—电器] TM77