电力系统电压稳定性及其研究现状(二)  

Power system voltage stability and its present investigation(Ⅱ)

作　　者：苏永春[1] 程时杰[1] 文劲宇[1] 刘岂 

机构地区：[1]华中科技大学电气与电子工程学院,湖北武汉430074 [2]小浪底建管局水力发电厂,河南洛阳471000

出　　处：《电力自动化设备》2006年第7期97-100,共4页Electric Power Automation Equipment

基　　金：国家自然科学基金项目(50595410)~~

摘　　要：在第一部分介绍电压稳定定义、分类及分析方法的基础上,针对负荷对电压稳定研究的重要作用,介绍了常用的静态和动态负荷模型,并分析了负荷特性对电压稳定的影响。给出了电力系统电压失稳的几种典型场景,如中长期电压失稳、电压崩溃、电压升高失稳等。可通过无功补偿、变压器分接头紧急控制、发电计划重新安排、切负荷等措施进行电压稳定控制。指出需进一步研究的问题:电压稳定机理;发电机对电压稳定的作用;考虑电能质量要求的电压稳定性;电压稳定与功角稳定的关系;电压稳定性的定量指标;考虑负荷的静态和动态模型;直流输电对电压稳定的影响。Based on the definition,classification and analysis methods of voltage stability introduced in the first part,general static and dynamic load models are described in this paper for its significant effect on the voltage stability. The influence of the load characteristic on voltage stability is also analyzed. Several typical scenarios of voltage instability are presented,including the mid- ＆ long-term voltage instabilities,the voltage collapse,the rising voltage instability. Countermeasures are reactive compensation,transformer tap emergency control,generation rescheduling,load shedding, and so on. Issues needing further study are pointed out：the voltage stability mechanism; the effect of generators on voltage stability;the voltage stability considering the power quality demand;the relationship between voltage and angle stabilities;the quantitative index for voltage stability ;static and dynamic models considering the load characteristic ;the effect of DC transmission on voltage stability,and so on.

关 键 词：电力系统 电压稳定 负荷 失稳 措施 

分 类 号：TM712[电气工程—电力系统及自动化]