摘要
现已提出的各种强度指标都是系统强度的近似反映。在运行无功有效短路比(operating reactive effectiveshort-circuit ratio,OQESCR)基础上改进得到了一种更为准确的强度指标KS,同时对比分析了二者的关系。推导得出了OQESCR和KS与系统运行状态关系的表达式,并据此画出了CIGRE标准系统的强度曲面图。利用最大功率曲线法,求得了KS的2个特殊值:临界KS和边界K S的表达式。以此为依据,提出了划分交直流系统强弱的标准。
Strength indices that have been put forward are approximate reflection of system strength.Based on the improvement of operating reactive effective short-circuit ratio（OQESCR）,a more accurate strength index KS is achieved,meanwhile the relation between OQESCR and KS are compared and analyzed.The expression between OQESCR,KS and system operating state is deduced,and based on this relation a strength figure of CIGRE standard model is plotted.Using the maximum power curve method,the expressions for two particular values of KS,namely critical KSand boundary K S,are obtained.Based on the two values a new criterion of strength classification is put forward.
出处
《电网技术》
EI
CSCD
北大核心
2013年第7期1856-1861,共6页
Power System Technology
基金
国家863高技术基金项目(2011AA05A119)
国家自然科学基金项目(51037003)~~
关键词
交直流系统
强度指标
最大功率曲线
强弱划分
AC/DC system
strength index
maximum power curve
strength classification
