计及调控成本和次数的配电网无功优化策略

A STRATEGY OF REACTIVE POWER OPTIMIZATION FOR DISTRIBUTION SYSTEM CONSIDERING CONTROL ACTION COST AND TIMES

提出了一种计及调控成本及调控次数的无功优化控制策略,以避免动作设备过多和过于频繁,并提出预优化和实时优化的两阶段处理方法:预优化采用传统模型对全天各个时段分别计算并统计;实时优化控制采用灵敏度与设备调节成本及次数等多目标,获得系统网损、电压水平、设备寿命和调控次数的综合优化结果。两阶段优化均采用改进的遗传算法,并采取措施加快搜索和减少随机解的影响。实例表明,文中策略和方法具有良好的实用性和较高的实时性,可满足调度运行的决策要求,可有效地应用于在线无功优化。

A new strategy of voltage-reactive power optimization for distribution system, considering control action cost and times, is proposed to avoid the equipments operating too much and frequent. Two-stage optimizations, i.e. the pre-optimization and the real-time control optimization are presented. The former is made separately for each time interval over dispatching period by load forecasting. In the latter, the optimal multi-objectives include sensitivity, equipment action cost and times, and accordingly the system voltage, power loss, equipment endurance and control action times can be optimized comprehensively. The improved Genetic Algorithm (GA) is adopted in the two-stage optimizations and some measures are taken in order to speed up the progress of computation and reduce the influence of stochastic results. The method based on this strategy can take account of the demand of dispatch decision-maker and be used to online practice operation effectively.