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Modeling and simulation of large power system with inclusion of bipolar MTDC grid

建模并且有双极的 MTDC 的包括的大力量系统的模拟格子

作     者:Li, Guanqun Ye, Hua Gao, Shilin Liu, Yutian Gao, Lei 

作者机构:Shandong Univ Key Lab Power Syst Intelligent Dispatch & Control Minist Educ 17923 Jingshi Rd Jinan 250061 Shandong Peoples R China China Elect Power Res Inst 15 Xiaoying East Rd Beijing 100192 Peoples R China 

出 版 物:《INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS》 (国际电力与能源系统杂志)

年 卷 期:2020年第116卷

页      面:105565-000页

核心收录:

学科分类:0808[工学-电气工程] 08[工学] 

基  金:National Key R&D Program of China [2016YFB0900500] 

主  题:Bipolar multi-terminal direct current (MTDC) Companion circuit method Electromechanical transient modeling Power system simulation 

摘      要:This paper presents an electromechanical transient modeling and simulation method for large power system with inclusion of bipolar multi-terminal direct current (MTDC) grid. First, the dynamic model of a modular multilevel converter (MMC) is presented. The dynamic model of the bipolar DC grid is then established by using the companion circuit method. In particular, the inductances of DC lines are carefully modeled to ensure the simulation accuracy when a DC fault occurs. Second, the electromechanical transient simulation procedure for a power system with inclusion of an MTDC grid is presented. The AC and DC grids are solved alternately. Due to the difference between time constants of AC and DC grids, the multi-rate scheme is used to ensure the simulation efficiency. Third, the proposed method is employed to simulate a real-life large power system with inclusion of a bipolar MTDC grid. The simulation results validate the correctness and the effectiveness of the proposed method. Unique interaction characteristics between AC and DC grids are also revealed by the results.

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