计及线路优化投切限流的含风电电网扩展规划方法  

Expansion Planning Method of Power Grid with Wind Power Considering Optimal Switching and Current Limiting

作　　者：董淑文 刘宝柱[1] 胡俊杰 DONG Shuwen;LIU Baozhu;HU Junjie(School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学电气与电子工程学院,北京102206

出　　处：《中国电力》2023年第8期117-125,142,共10页Electric Power

基　　金：国家自然科学基金资助项目(52177080)。

摘　　要：为应对以风电为代表的新能源大规模接入电力系统带来的新挑战,提出了一种计及线路优化投切限流的含风电电网扩展规划模型。首先,从系统负荷变化引起常规火电机组启停的角度出发,将典型场景下的短路电流约束转化为对应机组启停状态下的约束,通过对风电场集电系统的结构等值研究风电场的等效表达式,引入考虑风电接入的短路电流约束。然后,确定电网扩展规划总体思路,以总投资最小为目标函数,建立综合考虑储能、需求侧响应以及短路电流约束的电网规划混合整数线性规划模型并求解。最后,以IEEE-RTS 24节点系统为例,通过设置不同的案例对比分析,验证了所提方法的有效性。In order to address the new challenges brought by the large-scale integration of new energy into the power system represented by wind power,a wind power grid expansion planning model considering line optimization,switching,and current limiting is proposed.First of all,from the perspective of conventional thermal power unit startup and shutdown caused by system load change,the short circuit current constraint in typical scenarios is converted into the constraint under the corresponding unit startup and shutdown status.The equivalent expression of wind farm is studied by the structural equivalence of wind farm’s power collection system,and the short circuit current constraint considering the wind power connection is introduced.Secondly,by determining the overall idea of power grid expansion planning and taking the minimum total investment as the objective function,the mixed integer linear programming model of power grid planning is established and solved that comprehensively considers the energy storage,demand-side response and short-circuit current constraints.Finally,taking IEEE-RTS 24-node system as an example,the effectiveness of the proposed method is verified by setting different cases for comparative analysis.

关 键 词：短路电流约束 风电场等效 线路投切 电网规划 机组启停状态 

分 类 号：TM715[电气工程—电力系统及自动化] TM614