| 引用本文: | 赵峥,田园园,薛英林,雷肖,杨张斌,胡宗邱.混合式制动电阻变换器的电磁暂态仿真等效建模[J].电力自动化设备,2021,41(7): |
| ZHAO Zheng,TIAN Yuanyuan,XUE Yinglin,LEI Xiao,YANG Zhangbin,HU Zongqiu.Equivalent modeling of electromagnetic transient simulation for hybrid braking resistance converter[J].Electric Power Automation Equipment,2021,41(7): |
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| 摘要: |
| 为了解决孤岛新能源柔性直流送出系统中混合式制动电阻变换器原始模型的巨大网络节点数严重制约电磁暂态仿真速度的问题，提出了一种基于戴维南等效及嵌套迭代的混合式制动电阻变换器电磁暂态等效建模方法，将其拆解为4类运行状态各异的子模块网络，结合子模块中主/辅开关器件的触发指令组合，得到各类子模块网络的戴维南等效电路，并将依此合成的混合式制动电阻变换器支路等效模型代入柔性直流送出系统网络求解，进而反推内部子模块电气特性，依此循环，迭代求解。并利用电磁暂态仿真软件PSCAD/EMTDC开展等效模型与原始模型的一致性仿真测试及仿真速度对比分析，结果表明所提方法能高度模拟混合式制动电阻变换器的外部运行特性及内部子模块变化特性，并可大幅缩短仿真时长。 |
| 关键词: 混合式制动电阻变换器 电磁暂态建模 嵌套迭代 戴维南等效 功率盈余 |
| DOI：10.16081/j.epae.202104001 |
| 分类号:TM46;TM743 |
| 基金项目:国家电网有限公司总部科技项目(远海风电柔性直流送出成套设计关键技术研究项目)(4000-201956494A-0-0-00) |
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| Equivalent modeling of electromagnetic transient simulation for hybrid braking resistance converter |
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ZHAO Zheng1, TIAN Yuanyuan1, XUE Yinglin1, LEI Xiao2, YANG Zhangbin2, HU Zongqiu2
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1.State Grid Economic and Technological Research Institute Co.,Ltd.,Beijing 102209, China;2.China Three Gorges Mechanical and Electrical Engineering Co.,Ltd.,Chengdu 610095, China
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| Abstract: |
| In order to solve the problem that the huge number of network nodes in the original model of hybrid braking resistance converter in the VSC-HVDC(Voltage Source Converter based High Voltage Direct Current) system with island new energy resources seriously restricts the speed of electromagnetic transient simulation, an equivalent modeling method for hybrid braking resistance converter based on Thevenin equivalent and nested iteration is proposed. In this method, the whole branch is divided into four kinds of sub-module networks with different operation states. The Thevenin equivalent circuit of each sub-module network is obtained based on the triggering instruction combination of main and auxiliary switching devices in the sub-modules, and the synthetic equivalent model of the hybrid braking resistance converter branch is substituted into the whole network of VSC-HVDC system for solution. The electrical characteristics of the internal sub-module are inversely deduced, and then the solution is iterated. The consistency test and simulation time comparison between the equivalent model and the original model are carried out in PSCAD/EMTDC simulation software. The results show that the method can greatly reduce the simulation time, and highly simulate the external operation characteristics and the internal sub-module variation characteristics of hybrid braking resistance converter. |
| Key words: hybrid braking resistance converter electromagnetic transient modeling nested iteration Thevenin equivalent power surplus |
