考虑DG渗透率的交直流混合配电网运行优化方法

Operation Optimization Method of AC/DC Distribution Network Considering DG Penetration Rate

为适应分布式电源大规模并网和直流负荷不断增长的发展趋势,发展交直流混合配电网已成为当前配电网研究的重要方向。首先对电压源型换流器的稳态潮流模型和控制策略进行了分析,提出了一种基于交替求解法的交直流配电系统潮流计算方法;然后,考虑分布式电源不同渗透比例,以系统的网损最小为目标,提出了基于遗传算法的交直流混合配电网运行优化调度方法;最后,结合交直流混合配电网算例系统进行仿真分析,仿真结果验证了所提方法的有效性。

In recent years,to adapt to the development of large-scale network-connected distributed generations and the increases of DC loads,the development of AC/DC hybrid distribution networks has become the research hotspot of distribution networks. Firstly,the steady-state model and the control strategy of voltage source converter is analyzed. A power flow calculation method for AC/DC distribution system based on alternative solution method is proposed. Then,considering the penetration rate of distributed generation,the operation optimization analysis method of AC/DC distribution network based on the genetic algorithm is proposed to minimize the line losses. Finally,the hybrid AC/DC distribution system is simulated and analyzed. The effectiveness of the proposed optimization method is verified by the simulation results.