城市高压电网在线综合无功优化模型的建立与实现

以在线负荷预测为依据,进行当前时刻以后24h内的并联电容器组和变压器分接头状态确定。优化目标为时段内的综合费用最小,计及了控制设备的调节代价;根据城市电网的实际特点,对电容器组和分接头分层处理;优化过程分静态优化和综合优化两个阶段进行,静态优化时由无功灵敏度值排序并确定电容器组投切状态,综合优化时对并联电容器组和变压器分接头进行24h状态协调。此方法计算速度快,可满足在线应用的要求,保证所得方案的可靠性和实用性。此方法正用于所开发的“城市高压电网智能决策支持系统”中, 投入实际电网试运行,并取得了较好效果。

Establishment and Realization of the On-line Compositive Reactive Power Optimization Model for Urban High Voltage Power Network

Based on the on-line forecasted load powers, the shunt capacitor states and tap changers in the next 24 hours are determined. The optimal objective is to minimize the compositive cost, and the adjusting cost of control devices is considered. Shunt capacitors and transformer taps are adjusted separately. From the practical characteristic of urban power systems, the optimization procedure is composed of two stages of static and compositive optimization. In the static stage, shunt capacitors are ordered by the reactive sensitivities and states are determined in static. In the compositive optimization stage, device states in 24 hours are coordinated. The proposed approach has quicker running speed to satisfy the requirement of on-line computation. Obtained results are reliable and practical. This approach is now being used as a function module of the reactive power optimization in the Intelligent Decision Supporting System for Urban High Voltage Power Network", and the operating state is satisfactory.