考虑直流系统双极闭锁故障的受端电网运行成本优化  

Operating cost optimization of the receiving side power system considering the bipolar blocking fault of the DC system

作　　者：廖长风 李勇[1] 马俊杰 LIAO Changfeng;LI Yong;MA Junjie(College of Electrical and Information Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学电气与信息工程学院,湖南长沙410082

出　　处：《电力系统保护与控制》2021年第12期79-86,共8页Power System Protection and Control

基　　金：国家自然科学基金项目资助(52007057);湖湘高层次人才聚集工程项目资助(2019RS1016);长沙市杰出创新青年计划资助(KQ2009037)。

摘　　要：现有的电力系统运行优化大多没有考虑故障短期运行安全约束,导致其优化结果没有为故障短期内快速控制保留充分有功备用,尤其在含特高压直流输入的电力系统发生直流闭锁故障后将会出现大量有功缺额,从而导致故障后系统大面积切负荷,给电力系统带来了严重经济损失。提出了一种考虑故障短期运行安全约束的含特高压接入受端系统发输电运行优化模型。首先,在含特高压接入受端系统中设置含直流双极闭锁在内的多个N-1故障。其次,在传统N-1安全约束下最优潮流规划模型中加入故障短期安全约束。最后,以发输电成本最小和切负荷成本最小为目标函数,提出了含特高压接入的受端电网运行成本优化模型。该模型在修改后的IEEE39节点系统中得到验证。Existing power system planning does not consider short-term security constraints,and does not reserve sufficient active power for short-term control after a fault,especially in the case of a DC blocking fault in the power system with UHVDC connection.In this case there will be a large amount of active power deficiency,resulting in a large area of load shedding after the fault.This brings serious economic losses to the power system.Therefore,this paper proposes an OPF model of the receiving side of the power system considering short-term operation security constraints.First,several N-1 faults including DC blocking are set in the system.Secondly,short-term security constraints are added to the optimal power flow planning model under the traditional N-1 security constraints.Finally,taking the minimum generation and transmission cost and the minimum load shedding cost as the objective function,an OPF model for the receiving side of the power system with UHVDC connection is proposed.The model is verified in the modified IEEE39 node system.

关 键 词：N-1短期运行安全约束 传统特高压直流输电 直流闭锁 最优潮流 

分 类 号：TM721.1[电气工程—电力系统及自动化]