CAJ | 학술논문

为了研究不同直流网络拓扑结构下电压源换流器型三端直流( VSC-TTDC)系统的运行特性，建立环形和星形两种网络拓扑结构的电磁暂态分析模型，利用Matlab和PSCAD/EMTDC分别实现了不同拓扑结构下VSC-TTDC系统的直流潮流计算和电磁暂态分析，并对两种不同拓扑结构进行全面的对比。结果表明：环形结构具有可靠性高、星形结构经济性好；输电任务较重的场合应优先选择环形结构，对系统电磁暂态特性要求较高的场合应选择星形结构。
위료연구불동직류망락탁복결구하전압원환류기형삼단직류( VSC-TTDC)계통적운행특성，건립배형화성형량충망락탁복결구적전자잠태분석모형，이용Matlab화PSCAD/EMTDC분별실현료불동탁복결구하VSC-TTDC계통적직류조류계산화전자잠태분석，병대량충불동탁복결구진행전면적대비。결과표명：배형결구구유가고성고、성형결구경제성호；수전임무교중적장합응우선선택배형결구，대계통전자잠태특성요구교고적장합응선택성형결구。
In order to study the performance of different topological structures of DC network of voltage source converter based three-terminal direct current ( VSC-TTDC) transmission system, electromagnetic transient models of two kinds of topological structures which are ring and star are stablished.DC power flow calculations and electromagnetic transient features are achieved in Matlab PSCAD/EMTDC.Comprehensive comparisons found that: The annular structure has the advantages of high reliability, while star structure has good economy;transmission heavier tasks occasions should choose a ring structure, while the star structure meets the re-quirements of demanding higher electromagnetic transient characteristics.