摘要
电力系统低频减载方案是低频减载保护的重要方面,分区低频减载方案的性能直接决定了低频切负荷的效果。针对以往低频减载方案设计方法的不足,提出了一套新的整定方法。首先通过分析方案特性,提出了一种基于参数取值集合的基础集整定方法,该方法能够整定出相对完整的候选方案集合;然后讨论了电力系统发生解列时,独立行政分区中的分区组合情形,给出了低频减载同调分区及相关概念的定义,并提出了建立系统同调分区集合的算法;最后给出了计及同调分区的方案全局优化算法。上述整定方法可以获得全局最优方案,使低频减载方案在不同事故情况下都能有优良的切负荷性能。
The design of power system＇s under frequency load-shedding （UFLS） scheme is very important to UFLS protection, and the performance of partitioned UFLS scheme directly depends on the effect of UFLS. To remedy the defects in existing design methods of UFLS, a set of new setting method is proposed. Firstly, based on the analysis on the characteristics of UFLS schemes, a base-set setting approach based on the set of chosen parameter values, which can give a relatively complete set of alternative schemes, is put forward; then the partition recombination of an independent administrative division under the splitting of power system is researched and the definitions of coherent partitions of UFLS and related concepts are given, besides, the algorithm for constructing coherent partition set of power system is put forward; finally, a global optimal UFLS scheme algorithm in which the coherent partitions are taken into account is given. Using the proposed setting approach, a global optimal UFLS scheme, which makes UFLS scheme possessing satisfied load-shedding performance under different accidents, can be attained.
出处
《电网技术》
EI
CSCD
北大核心
2010年第6期106-112,共7页
Power System Technology
关键词
电力系统
方案基础集
同调分区
低频减载
割集
全局优化
power system
fundamental scheme set
coherent partitions
under frequency load shedding （UFLS）
cut-set
global optimization
