摘要
九域图原理是电压无功控制的成熟理论,但在处理三绕组变压器时有一定的难度。文中介绍了一种基于拓扑分析的自动电压无功控制(AVQC)调控单元的划分方法,将三绕组变压器拆分为2个双绕组变压器,然后搜索并联变压器,将变电站中的变压器划归到具体调控单元中。根据变压器的具体接线方式,确定同一个变电站中各调控单元间的相关性和优先级。根据调控单元的电压水平和无功大小以及调控单元间的关系,给出合理的调控策略,将变电站中电压无功的控制归结为对调控单元的调节。这种方法不受变压器接线方式和运行模式的限制,大大提高了九域图原理的灵活性和应用的广泛性,根据此原理开发的电压无功控制软件得到了成功和广泛的应用。
The nine zone graph theory is widely recognized in reactive power optimization but hard to deal with three-coil transformers. This paper presents a method of identifying the AVQC adjusting unit based on the topology analysis, which considers a three-eoil transformer as two double-coil transformers and finds the parallel connection transformers. So the transformers in power station are included to devices in adjusting units. In terms of the connection modes of transformers, the correlation and priority of the adjusting units in a same station is proposed. According to the voltage and reactive power of every adjusting unit and the relationship of the adjusting units, the paper proposes a reasonable adjusting policy, resulting in turning adjusting the voltage and reactive power in station to adjusting the unit＇ s voltage and reactive power. The method acquires greater flexibility and comprehensive application, regardless of the connection manner and running mode of the substation. The software developed based on the theory is successfully and widely used.
出处
《电力系统自动化》
EI
CSCD
北大核心
2006年第2期77-80,共4页
Automation of Electric Power Systems
关键词
九域图
自动电压无功控制(AVQC)
拓扑分析
三绕组变压器
nine-zone graph theory
automatic reactive power optimization （AVQC）
topology analysis
three coil transformer
