主动配电网分区分布式无功优化控制方法

Distributed Reactive Power Optimization Control Method for Active Distribution Network Based on Subarea Division

大规模分布式电源的接入对配电网无功优化提出了巨大的挑战,而传统集中优化存在依赖中央控制器,易产生通信堵塞等弊端。为提高主动配电网无功电压控制的可靠性,采用二阶锥松弛技术建立了主动配电网无功优化模型,并基于辅助问题原理提出了一种主动配电网分区分布式无功优化控制方法,并进一步提出了边界变量标准化处理方法,以提高分区无功优化的收敛速度,实现全局网损优化。基于所提优化方法,各个分区仅需采集区内功率电压信息,并与相邻分区交互边界变量即可实现无功调度和全局网损优化,保证系统电压质量。最后,基于IEEE 69节点配电系统进行仿真,验证了所提控制方法的有效性。

The integration of large- scale distributed genera- tions presents a huge challenge on reactive power optimiza- tion for active distribution network. While the traditional centralized control has such disadvantages as being depend- ent on central control and easy to produce a communication blockage. To improve the control reliability of distribution network, reactive power optimization model is built based on second-order cone relaxation techniques, and a subarea based distributed reactive power optimization control meth- od for active distribution network based on auxiliary problem principle is presented to achieve global active power loss op- timization. In addition, border variable standardized meth- od is proposed to improve convergence speed of subarea based reactive optimization. Based on the proposed control method, the reactive power scheduling and global active power loss optimization can be realized just according to thepower and voltage information collected from individual partition and interface border variables in neighborhood partitions, which guarantees voltage quality of power sys- tem. In the end, by using the IEEE 69-bus distribution sys- tem, the effectiveness of the proposed control method is verified by numerical simulations.