厂厂协调技术在特高压近区自动电压控制中的应用

Application of Coordinating Technology between Power Plants in Automatic Voltage Control System of Power Plants Near UHV Grid

提出了一种自动电压控制中的厂厂协调技术,从厂厂间机组不协调的本质出发,通过聚类算法与拓扑搜索生成厂厂协调组,采用协调组内各电厂无功裕度作为协调状态判定,利用"超前预防、滞后校正"控制来达到不同电厂间机组协调均衡控制,从而减少网损,保障系统电压稳定水平。通过特高压近区武乡与榆社电厂进行厂厂协调实例分析,结果验证这2个电厂的无功不均衡现象得到了有效修正,消除了系统区域内的无功不合理流动,提高了系统的电压稳定裕度。

This paper proposes one coordinating technology between different plants in automatic voltage control system. Since there are incongruities between generator units in different power plants,clustering algorithm and Topological discovery algorithm are adopted to generate coordination group, and reactive power margin of power plants in the coordination group is adopted as coordinating state judgment. The principle of Advanced Prevention and Delayed Correction is applied to achieve the balance between generator units of different power plants,thereby the network loss is reduced,and voltage stability level is improved. Yushe Power Plant and Wuxiang Power Plant near UHV grid are analysed as examples,and the results verify that the incongruity between the reactive powers of these two plants is corrected effectively and the unreasonable flow of reactive power in the system is eliminated,then the system voltage stability margin is increased.