配电网运行及设备控制综合经济性的无功电压优化

为了避免配电网无功电压优化中参与调节的设备过多和设备调节过于频繁,提出了一种计及系统运行网损、设备操作成本和限制调控设备数的无功电压综合控制新方法。首先对调度周期各时段预优化,获取实时优化所需的部分数据;实时控制中,优化目标采用灵敏度与设备调节成本和次数等多目标相结合,同时对动作过频的设备引入惰性因子,不仅可以避免设备动作次数过多,同时可以将设备的调控合理地分布到调度周期的各个时段,从而对全系统的电压、网损、设备寿命和动作次数进行综合优化。寻优采用改进遗传算法,利用灵敏度、不同二进制长度编码、动态改变种群大小等手段,提高了搜索质量和计算速度。实例表明,该方法可以有效解决无功电压优化中的设备调控限次问题,具有较好的实用性和实时性。

Volt/VAR Optimization Considering Integrated Operation Economy of Distribution System and Equipment

In order to avoid the equipment operated frequently and too much equipment adjusted in voltage-reactive power optimization control, a new method considering power loss, equipment operated cost and the number of operated equipment in distribution network is proposed. Before the whole dispatching period, the pre-optimization is made for each time period separately, using the result of load forecasting. In real-time control, the optimal objective is a multi-objective manner, made up of sensitivity, equipment operated cost and times. The inertia factors are introduced when equipment are adjusted too frequently, to avoid excessive equipment operated times, as well as distribute equipment operation rationally to each time slice of a dispatching period. The system voltage, power loss, equipment endurance and operated times could be comprehensively optimized consequently. The genetic algorithm (GA) is introduced and improved as the optimal algorithm, and the sensitivity, different length of binary coding and dynamic searching population are used to ensure optimization quality and accelerate the searching course. The practice results show that the method is effective, practicable and real-time to solve the problem of operated times and numbers for volt-reactive power optimization and obtain the compositive economy of system operation and equipment control.