考虑变换器功率约束和直流电压约束的交直流混合配电网最优潮流计算  

Optimal Power Flow Calculation for AC/DC Hybrid Distribution Network Considering Converter Power Constraints and DC Voltage Constraints

作　　者：金国彬 石超[1] 陈庆 李国庆[1] 潘狄 成龙 JIN Guobin;SHI Chao;CHEN Qing;LI Guoqing;PAN Di;CHENG Long(Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology,Ministry of Education(Northeast Electric Power University),Jilin 132000,Jilin Province,China;State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 211000,Jiangsu Province,China)

机构地区：[1]现代电力系统仿真控制与绿色电能新技术教育部重点实验室(东北电力大学),吉林省吉林市132000 [2]国网江苏省电力有限公司,江苏省南京市211000

出　　处：《电网技术》2021年第4期1487-1495,共9页Power System Technology

基　　金：国家重点研发计划资助项目(2018YFB0904700)。

摘　　要：电力电子变换器是现代交直流混合配电网关键的电能变换设备,应通过可靠的设计、控制,尤其是优化运行,保证其长期运行的可靠性。基于变换器的灵活可控性,提出了考虑变换器功率约束和直流电压约束的交直流混合配电网最优潮流计算。首先,建立电力电子变换器及交直流混合配电网潮流计算模型。其次,提出分级功率均分的优化策略,并建立考虑可靠性约束的最优潮流目标函数。最后,基于JAYA算法计算得出决策变量的最优解。其中,提出一种雅可比矩阵的处理方法,以提升潮流计算速度、提高算法效率。算例结果表明:该方法能很好地解决含两端、多端、多馈入的交直流混合配电网考虑长期运行可靠性的最优潮流问题。Power electronic converters are the key power conversion equipment in modern AC-DC hybrid distribution networks. Their reliable design and control, especially its optimized operation, should be adopted to ensure the reliability of its long-term operation. Based on the flexible controllability of the converter, this paper proposes an optimal power flow calculation for the AC-DC hybrid distribution network considering the converter power constraints and DC voltage constraints. First, a power flow calculation model is established for the power electronic converters and AC-DC hybrid distribution networks. Secondly, an optimization strategy for hierarchical power sharing is proposed, and an optimal power flow objective function considering reliability constraints is constructed. Finally, the optimal solution of the decision variables is calculated based on the JAYA algorithm. In this process, a Jacobian matrix processing method is proposed to improve the speed of power flow calculation as well as the efficiency of the algorithm. The results of calculation examples show that the method can well solve the optimal power flow problem of the AC-DC hybrid distribution network with two ends, multiple ends, or multiple feeders considering its long-term operation reliability.

关 键 词：电力电子变换器 交直流混合配电网 可靠性 功率均分 快速潮流 最优潮流 

分 类 号：TM721[电气工程—电力系统及自动化]