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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。
Nine-map principle is a mature theory of voltage and reactive power control, but there are certain difficulties in dealing with three-winding transformers. In this paper, an automatic Voltage Reactive Power Control (AVQC) control unit division method based on topological analysis is introduced. The three-winding transformer is split into two double-winding transformers, then the parallel transformers are searched and the transformers in the substations are assigned to the specific Control unit. According to the specific wiring of the transformer, determine the correlation and priority among the control units in the same substation. According to the control unit voltage level and the size of the reactive power and the relationship between the control unit, gives a reasonable control strategy, the substation voltage and reactive power control attributed to the regulation of the control unit. This method is not limited by transformer wiring and operation modes, greatly improving the flexibility of nine-map principle and the wide range of applications. The voltage-reactive control software developed based on this principle has been successfully and widely used.