基于馈线类型差异化的变电站侧无功电压控制策略研究

Research on Reactive Power and Voltage Control Strategy of Substation Based on Feeder Type Differentiation

目前变电站电压无功综合控制装置在实际应用中主要为AVC,其包括集中控制和分散控制两种模式。集中控制模式对通信可靠性要求高,容易增加AVC系统全局优化计算的复杂性,甚至影响到系统整体的可靠性。此外,AVC系统仅考虑到10 kV母线电压运行情况,缺少考虑馈线运行信息及电气特征情况,因此根据电气特征将馈线分成城市、城镇、农村、山区4种类型,接着建立涵盖负荷特性和网架特征的台区电气特征指标体系,并以此分别形成各类馈线基态模型,其次通过仿真得出各类馈线对应的变电站10 kV母线电压控制区间表,最后根据馈线实际情况将母线电压控制在对应区间内。

Presently, the substation voltage and reactive power control device is mainly used in AVC, which includes centralized control and decentralized control of two modes. Centralized control mode needs high requirements on the reliability of communication, easy to increase the computational complexity of global optimization of AVC system, and even affects the reliability of the whole system; decentralized control mode of AVC is required by the relevant node of the network voltage and current information through the monitoring system of SCADA, the follow-up by means of communication channel to send commands to the corresponding action equipment. In this paper,feeders will be divided into urban, town, rural, mountain 4 types according to the electrical characteristics; then establish the covering load characteristics and grid characteristics of transformer district electrical characteristic index system, which respectively form various types of feeder ground model; moreover, through the simulation of the feeder should obtain all types of 10kV substation bus voltage control interval; finally, the bus voltage control in the corresponding interval according to the actual situation of feeder.