直流潮流控制器对多端直流系统的运行网损分析  

Network Loss Influence Analysis of Multi-terminal DC System with DC Power Flow Controller

作　　者：王帅 朱淼[2] 钟旭[2] 王晗 蔡旭[2] WANG Shuai;ZHU Miao;ZHONG Xu;WANG Han;CAI Xu(State Grid Anhui Electric Power Company Hefei Power Supply Company,Hefei 230022,China;Key Laboratory of Control of Power Transmission and Conversion,Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]国网安徽省电力有限公司合肥供电公司,合肥230022 [2]电力传输与功率变换控制教育部重点实验室(上海交通大学),上海200240

出　　处：《高电压技术》2021年第7期2469-2479,共11页High Voltage Engineering

基　　金：上海市优秀学术/技术带头人计划(19XD1422000)。

摘　　要：直流潮流控制器可有效增强复杂直流系统中的潮流可控性,对直流电网运行网损具有一定的调节能力。为统一描述和比较各类直流潮流控制器的外特性,建立了基于等效变比M的外特性模型。首先以三端环网直流系统场景为例,结合上述变比模型,合理分析并比较不同直流潮流控制器对该直流系统运行损耗的影响。分析表明,通过对直流潮流控制器合理选型并设定优化控制目标,单个直流潮流控制器和多个直流潮流控制器分别可使系统运行损耗最多降低0.0002%和1.81%。并针对一个四端直流输电系统场景,建立反应特定三线间直流潮流控制器对系统运行网损影响的定量模型,该场景下网损最大降幅为3.35%。最后,针对具体的两个典型场景在PLECS环境下搭建仿真模型,验证了上述模型的有效性和稳定性。DC power flow controller can effectively enhance the controllability of the power flow in a complex DC system,and has a certain ability to adjust the operating network loss of the DC power grid.In order to uniformly describe and compare the external characteristics of different DC power flow controllers,an external characteristic model based on the equivalent gain M was established in this paper.A three-terminal DC system was taken as an example,and,combined with the equivalent gain model,the effects of different DC power flow controllers on operating loss of the DC system were reasonably analyzed and compared.The analysis shows that,by selecting DC power flow controller reasonably and setting the optimal control target,a single controller and multiple DC power flow controllers can reduce network loss by 0.0002% and 1.81%,respectively.In a four-terminal DC system,a quantitative model was established to reflect the influence of 3-line DC power flow controller on network loss.In this scenario,the network loss could be reduced by 3.35%.Finally,a simulation model was built and verified under the PLECS environment,which proved the effectiveness and stability of the above model.

关 键 词：多端直流输电 直流潮流控制器 线间直流潮流控制器 网损 优化控制 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM571