可用于实际工程的MMC-HVDC输电系统等值模型
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摘要
模块化多电平换流器高压直流MMC-HVDC(modularmultilevelconverterhigh-voltagedirect-current)输电系统中大量的桥臂子模块给仿真带来巨大的计算量,使得仿真速度慢,仿真规模受限。本文通过分析MMC-HVDC系统不同运行条件下的桥臂子模块运行特性,将三种运行工况下桥臂子模块的等值模型进行统一表达,设计出可仿真启动、正常运行和闭锁等多工况的改进的MMC-HVDC系统等值模型。以21电平详细模型与等值模型为例,测试了模型多运行工况性能和模型的仿真速度与精度,并以501电平MMC-HVDC系统测试了模型仿真规模。结果表明所建立的等值模型仿真精度高,仿真规模大,可有效用于工程实际MMC-HVDC系统仿真。
The large number of arm sub-modules(SMs)in a modular multilevel converter high-voltage direct-current(MMC-HVDC)transmission system may bring tremendous computing workload to the simulation,resulting in slow simulation speed and limited simulation scale. In this paper,the operating characteristics of arm SMs in different operating conditions of MMC-HVDC are analyzed;the equivalent models of arm SMs under three operating conditions are expressed uniformly,and the improved equivalent model of MMC-HVDC that can simulate different operating conditions(e.g. the starting process,normal operation,and blocking state)is designed. With a 21-level detailed model and the equivalent model taken as examples,the simulation speed and accuracy of the proposed model,as well as the model's performance under different working operating conditions,are tested;in addition,the simulation scale of the model is tested on a 501-level MMC-HVDC system. Results show that the established equivalent model has high accuracy and a large simulation scale,which can be effectively applied to simulate the MMC-HVDC system in real projects.
The large number of arm sub-modules(SMs)in a modular multilevel converter high-voltage direct-current(MMC-HVDC)transmission system may bring tremendous computing workload to the simulation,resulting in slow simulation speed and limited simulation scale. In this paper,the operating characteristics of arm SMs in different operating conditions of MMC-HVDC are analyzed;the equivalent models of arm SMs under three operating conditions are expressed uniformly,and the improved equivalent model of MMC-HVDC that can simulate different operating conditions(e.g. the starting process,normal operation,and blocking state)is designed. With a 21-level detailed model and the equivalent model taken as examples,the simulation speed and accuracy of the proposed model,as well as the model's performance under different working operating conditions,are tested;in addition,the simulation scale of the model is tested on a 501-level MMC-HVDC system. Results show that the established equivalent model has high accuracy and a large simulation scale,which can be effectively applied to simulate the MMC-HVDC system in real projects.
引文
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[4]张芳,张光耀,陈堃.(Zhang Fang,Zhang Guangyao,Chen Kun)基于线性自抗扰控制的MMC环流抑制策略(Circulating current suppressing strategy for modular multilevel converter based on linear active disturbance rejection control)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2018,30(2):71-78.
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[10]蒋霖,周诗嘉,李子寿,等(Jiang Lin,Zhou Shijia,Li Zishou,et al).可仿真任意工况的MMC等值电磁暂态仿真模型与平均值模型(Equivalent electromagnetic model and averaged value model of MMC for operating condition simulation)[J].南方电网技术(Southern Power System Technology),2016,10(2):10-17.
[11]周诗嘉,林卫星,姚良忠,等(Zhou Shijia,Lin Weixing,Yao Liangzhong,et al).两电平VSC与MMC通用型平均值仿真模型(Generic averaged value models for two-level VSC and MMC)[J].电力系统自动化(Automation of Electric Power Systems),2015,39(12):138-145.
[12] Saad H,Dennetiere S,Mahseredjian J,et al. Modular multilevel converter models for electromagnetic transients[J].IEEE Trans on Power Delivery,2014,29(3):1481-1489.
[13] Peralta J,Saad H,Dennetiere S,et al. Detailed and averaged models for a 401-level MMC-HVDC system[J]. IEEE Trans on Power Delivery,2012,27(3):1501-1508.
[14]许建中,赵成勇,刘文静(Xu Jianzhong,Zhao Chengyong,Liu Wenjing).超大规模MMC电磁暂态仿真提速模型(Accelerated model of ultra-large scale MMC in electromagnetic transient simulations)[J].中国电机工程学报(Proceedings of the CSEE),2013,33(10):114-120.
[15]许建中,李承昱,熊岩,等(Xu Jianzhong,Li Chengyu,Xiong Yan,et al).模块化多电平换流器高效建模方法研究综述(A review of efficient modeling methods for modular multilevel converters)[J].中国电机工程学报(Proceedings of the CSEE),2015,35(13):3381-3392.
[2] Debnath S,Qin Jiangchao,Bahrani B,et al. Operation,control,and applications of the modular multilevel converter:a review[J]. IEEE Trans on Power Electronics,2014,30(1):37-53.
[3] Perez M A,Bernet S,Rodriguez J,et al. Circuit topologies,modeling,control schemes,and applications of modular multilevel converters[J]. IEEE Trans on Power Electronics,2015,30(1):4-17.
[4]张芳,张光耀,陈堃.(Zhang Fang,Zhang Guangyao,Chen Kun)基于线性自抗扰控制的MMC环流抑制策略(Circulating current suppressing strategy for modular multilevel converter based on linear active disturbance rejection control)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2018,30(2):71-78.
[5] Glasdam J,Hjerrild J,Kocewiak L H,et al. Review on multi-level voltage source converter based HVDC technologies for grid connection of large offshore wind farms[C]//IEEE International Conference on Power System Technology. Auckland,New Zealand,2012.
[6]汤广福,庞辉,贺之渊(Tang Guangfu,Pang Hui,He Zhiyuan).先进交直流输电技术在中国的发展与应用(R&D and application of advanced power transmission technology in China)[J].中国电机工程学报(Proceedings of the CSEE),2016,36(7):1760-1771.
[7] Simon P T. Simplified dynamic model of a voltage-sourced converter with modular multilevel converter design[C]//IEEE/PES Power Systems Conference and Exposition. Seattle,USA,2009.
[8] Liu Sheng,Xu Zheng,Hua Wen,et al. Electromechanical transient modeling of modular multilevel converter based multi-terminal HVDC systems[J]. IEEE Trans on Power Systems,2014,29(1):72-83.
[9]许建中,赵成勇,Aniruddha M Gole(Xu Jianzhong,Zhao Chengyong,Aniruddha M Gole).模块化多电平换流器戴维南等效整体建模方法(Research on the Thevenin’s equivalent based integral modelling method of the modular multilevel converter(MMC))[J].中国电机工程学报(Proceedings of the CSEE),2015,35(8):1919-1929.
[10]蒋霖,周诗嘉,李子寿,等(Jiang Lin,Zhou Shijia,Li Zishou,et al).可仿真任意工况的MMC等值电磁暂态仿真模型与平均值模型(Equivalent electromagnetic model and averaged value model of MMC for operating condition simulation)[J].南方电网技术(Southern Power System Technology),2016,10(2):10-17.
[11]周诗嘉,林卫星,姚良忠,等(Zhou Shijia,Lin Weixing,Yao Liangzhong,et al).两电平VSC与MMC通用型平均值仿真模型(Generic averaged value models for two-level VSC and MMC)[J].电力系统自动化(Automation of Electric Power Systems),2015,39(12):138-145.
[12] Saad H,Dennetiere S,Mahseredjian J,et al. Modular multilevel converter models for electromagnetic transients[J].IEEE Trans on Power Delivery,2014,29(3):1481-1489.
[13] Peralta J,Saad H,Dennetiere S,et al. Detailed and averaged models for a 401-level MMC-HVDC system[J]. IEEE Trans on Power Delivery,2012,27(3):1501-1508.
[14]许建中,赵成勇,刘文静(Xu Jianzhong,Zhao Chengyong,Liu Wenjing).超大规模MMC电磁暂态仿真提速模型(Accelerated model of ultra-large scale MMC in electromagnetic transient simulations)[J].中国电机工程学报(Proceedings of the CSEE),2013,33(10):114-120.
[15]许建中,李承昱,熊岩,等(Xu Jianzhong,Li Chengyu,Xiong Yan,et al).模块化多电平换流器高效建模方法研究综述(A review of efficient modeling methods for modular multilevel converters)[J].中国电机工程学报(Proceedings of the CSEE),2015,35(13):3381-3392.