提升电网受电能力的多直流低压限流控制器参数优化方法  

Optimization Method of Multi-DC VDCOL Parameters for Improving the Power Receiving Capacity of Regional Power Grid

作　　者：田浩 蒋哲 马琳琳 马欢 李常刚[3] TIAN Hao;JIANG Zhe;MA Linlin;MA Huan;LI Changgang(State Grid Shandong Electric Power Research Institute,Jinan 250003,China;State Grid Shandong Electric Power Company,Jinan 250001,China;Shandong University,Jinan 250061,China)

机构地区：[1]国网山东省电力公司电力科学研究院,山东济南250003 [2]国网山东省电力公司,山东济南250001 [3]山东大学,山东济南250061

出　　处：《山东电力技术》2023年第7期30-36,共7页Shandong Electric Power

基　　金：国家自然科学基金项目(52177096)。

摘　　要：多直流受端电网普遍面临电压支撑能力不足、交直流相互影响加剧、运行方式复杂多变的挑战,严重交流故障极易引发多回直流连续换相失败,甚至导致全网电压崩溃。提出一种提升地区电网受电能力的多直流低压限流控制器(Voltage Dependent Current Order Limiter,VDCOL)参数协调优化方法。首先,通过临界运行方式确定当前系统的主导失稳模式,并分别针对功角失稳、电压失稳两种不同模式提出差异化的VDCOL参数调整原则。基于多馈入短路比大小排序结果,对多回直流进行参数调整,最终达到抑制换相失败的发生,提升地区电网接纳外网受电能力的效果。通过实际电网仿真分析验证,按照所提方法优化直流参数后,可显著增加地区电网外网受电能力。The multi-DC receiving-end power grid is generally faced with the challenges of insufficient voltage support capacity,intensified interaction between AC and DC,and changeable operation modes.A multi-DC VDCOL(voltage dependent current order limiter)parameters optimization method to improve the power receiving capacity of the regional power grid was proposed.Firstly,the dominant instability mode of the current system was determined through the critical operation mode,and differentiated VDCOL parameter adjustment principles were proposed for the two different modes of power angle instability and voltage instability.Then,based on the sorting results of the multi-infeed short-circuit ratio,the parameters of the multi-circuit DC VDCOL were adjusted to suppress the occurrence of commutation failure and to improve the effect of receiving external power in the regional power grid.Lastly,the simulation analysis and verification of the actual power grid shows that after optimizing the DC parameters according to the proposed method,the power receiving capacity of the regional power grid can be increased.

关 键 词：低压限流控制器 多直流 电压稳定 多馈入短路比 

分 类 号：TM722[电气工程—电力系统及自动化]