基于信息间隙决策理论的下垂控制直流配电网运行参考点优化方法  

Operation Reference Point Optimization of Droop-controlled DC Distribution Networks Based on Information Gap Decision Theory

作　　者：刘琪[1] 王守相[1] 赵倩宇 梁栋[2] 高海淑 LIU Qi;WANG Shouxiang;ZHAO Qianyu;LIANG Dong;GAO Haishu(Key Laboratory of Smart Grid of Ministry of Education(Tianjin University),Nankai District,Tianjin 300072,China;State Key Laboratory of Reliability and Intelligence of Electrical Equipment(Hebei University of Technology),Beichen District,Tianjin 300130,China;School of Electrical Engineering,Shandong University,Jinan 250061,Shandong Province,China)

机构地区：[1]智能电网教育部重点实验室(天津大学),天津市南开区300072 [2]省部共建电工装备可靠性与智能化国家重点实验室(河北工业大学),天津市北辰区300130 [3]山东大学电气工程学院,山东省济南市250061

出　　处：《电网技术》2022年第11期4381-4390,共10页Power System Technology

基　　金：国家自然科学基金联合基金项目(U2166202)。

摘　　要：为有效考虑直流配电网中分布式电源(distributed generation,DG)出力和负荷随机性的影响,提出了基于信息间隙决策的直流配电网下垂控制运行参考点优化方法。首先,在DG出力和负荷为预测值的基准场景下,以节点电压偏离额定值方差最小为目标对下垂控制运行参考点进行优化;其次,对优化方案应对DG和负荷变化的能力进行评估,针对运行约束越限风险较大的时段,提出了基于信息间隙决策的运行参考功率下层调度模型,在保证节点电压相对于基准场景下优化结果的恶化值小于设定值的约束下,以最大化DG出力和负荷的波动区间为目标对运行参考点进行优化调整。仿真结果表明,所提出的优化模型能在降低传统鲁棒决策保守性的同时,有效提高直流配电网应对DG出力和负荷变化的能力。In order to effectively solve the influence of distributed generation(DG) output and load uncertainty in the DC distribution network, an optimal method of droop control operation reference point in the DC distribution network is proposed based on the information gap decision theory(IGDT). Firstly, in the benchmark scenario with DG output and load as predicted values, the droop control operation reference point is optimized with the objective of minimizing the variance of node voltage deviation from the rated value. Secondly, the ability of the optimization scheme under the benchmark scenario to deal with the variation of DG output and load is evaluated. For the periods with high risks of the limit exceeding of the operation constraints, the lower-level optimization model of the operation reference point is proposed based on the IGDT. Considering the constraint that the deterioration of node voltage compared with the scheduling results in the benchmark scenario is less than the setting value, the droop control operation reference point is reoptimized with the goal of maximizing the fluctuation range of the DG output and load. Simulation results show that the proposed optimization model can reduce the conservatism of the traditional robust optimization and effectively improve the ability of DC distribution network to deal with the DG output and load changes.

关 键 词：直流配电网 优化运行 信息间隙决策理论 下垂控制 运行参考点 

分 类 号：TM721[电气工程—电力系统及自动化]