VSC-HVDC与弱交流电网混联系统大扰动行为机理及稳定控制
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摘要
基于电压源换流器的柔性直流输电(voltagesourceconverterHVDC,VSC-HVDC),其与弱交流电网构成的混联系统的稳定问题,是当前工程界关注的重点和学术界研究的热点。该文首先建立计及限幅环节、故障穿越策略,以及保护闭锁逻辑的VSC-HVDC机电暂态仿真模型;提出VSC换流器非线性功率特性的大扰动测辨方法,分析和识别影响VSC功率特性的关键因素。在此基础上,揭示大扰动冲击下混联系统存在的不同形式的失稳现象及其行为机理,并提出稳定控制策略。VSC-HVDC与弱交流电网混联系统的大扰动时域仿真结果验证了机理分析的正确性以及控制策略的有效性。
The stability problem of the voltage source converter based HVDC(VSC-HVDC) and weak AC network hybrid system is the focus of attention in the current engineering field and the hot spot of academic research. In this paper, the electromechanical transient simulation model of VSC-HVDC was established firstly with considering the limit amplitude link, fault ride through strategy and blocking logic. A large disturbance test method for the nonlinear power characteristics of VSC converter was proposed, and the power characteristics and key factors of the converter were analyzed. On this basis, the different forms of instability phenomenon and the behavior mechanism of the hybrid system under the large disturbance were revealed, and the countermeasures were put forward. The validity of the mechanism analysis and the effectiveness of the control measures were verified by the time domain simulation of the hybrid system with VSC-HVDC and weak AC network.
The stability problem of the voltage source converter based HVDC(VSC-HVDC) and weak AC network hybrid system is the focus of attention in the current engineering field and the hot spot of academic research. In this paper, the electromechanical transient simulation model of VSC-HVDC was established firstly with considering the limit amplitude link, fault ride through strategy and blocking logic. A large disturbance test method for the nonlinear power characteristics of VSC converter was proposed, and the power characteristics and key factors of the converter were analyzed. On this basis, the different forms of instability phenomenon and the behavior mechanism of the hybrid system under the large disturbance were revealed, and the countermeasures were put forward. The validity of the mechanism analysis and the effectiveness of the control measures were verified by the time domain simulation of the hybrid system with VSC-HVDC and weak AC network.
引文
[1]康重庆,姚良忠.高比例可再生能源电力系统的关键科学问题与理论研究框架[J].电力系统自动化,2017,41(9):2-11.Kang Chongqing,Yao Liangzhong.Key scientific issues and theoretical research framework for power systems with high proportion of renewable energy[J].Automation of Electric Power Systems,2017,41(9):2-11(in Chinese).
[2]刘振亚,张启平,董存,等.通过特高压直流实现大型能源基地风、光、火电力大规模高效率安全外送研究[J].中国电机工程学报,2014,34(16):2513-2522.Liu Zhenya,Zhang Qiping,Dong Cun,et al.Efficient and security transmission of wind,photovoltaic and thermal power of large-scale energy resource bases through UHVDC projects[J].Proceedings of the CSEE,2014,34(16):2513-2522(in Chinese).
[3]肖湘宁.新一代电网中多源多变换复杂交直流系统的基础问题[J].电工技术学报,2015,30(15):1-14.Xiao Xiangning.Basic problems of the new complex ac-dc power gird with multiple energy resources and multiple conversions[J].Transactions of China Electrotechnical Society,2015,30(15):1-14(in Chinese).
[4]盛万兴,段青,孟晓丽,等.电力电子化进程下的交直流无缝混合灵活配电系统研究[J].中国电机工程学报,2017,37(7):1877-1888.Sheng Wanxing,Duan Qing,Meng Xiaoli,et al.Research on the AC&DC seamless-hybrid fluent power distribution system following the power electronics evolution[J].Proceedings of the CSEE,2017,37(7):1877-1888(in Chinese).
[5]姜齐荣,王亮,谢小荣.电力电子化电力系统的振荡问题及其抑制措施研究[J].高电压技术,2017,43(4):1057-1066.Jiang Qirong,Wang Liang,Xie Xiaorong.Study on oscillations of power-electronized power system and their mitigation schemes[J].High Voltage Engineering,2017,43(4):1057-1066(in Chinese).
[6]陈国平,李明节,许涛,等.关于新能源发展的技术瓶颈研究[J].中国电机工程学报,2017,37(1):20-26.Chen Guoping,Li Mingjie,Xu Tao,et al.Study on technical bottleneck of new energy development[J].Proceedings of the CSEE,2017,37(1):20-26(in Chinese).
[7]李明节,于钊,许涛,等.新能源并网系统引发的复杂振荡问题及其对策研究[J].电网技术,2017,41(4):1035-2498.Li Mingjie,Yu Zhao,Xu Tao,et al.Study of complex oscillation caused by renewable energy integration and its solution[J].Power System Technology,2017,41(4):1035-1042(in Chinese).
[8]李明节.大规模特高压交直流混联电网特性分析与运行控制[J].电网技术,2016,40(4):985-991.Li Mingjie.Characteristic analysis and operational control of large-scale hybrid uhv ac/dc power grids[J].Power System Technology,2016,40(4):985-991(in Chinese).
[9]郑超,马世英,申旭辉,等.强直弱交的定义、内涵与形式及其应对措施[J].电网技术,2017,41(8):2491-2498.Zheng Chao,Ma Shiying,Shen Xuhui,et al.Definition,connotation and form of strong hvdc and weak ac and countermeasures for stable operation of hybrid power grid[J].Power System Technology,2017,41(8):2491-2498(in Chinese).
[10]袁小明,程时杰,胡家兵.电力电子化电力系统多尺度电压功角动态稳定问题[J].中国电机工程学报,2016,36(19):5145-5154.Yuan Xiaoming,Cheng Shijie,Hu Jiabin.Multi-time scale voltage and power angle dynamics in power electronics dominated large power systems[J].Proceedings of the CSEE,2016,36(19):5145-5154(in Chinese).
[11]朱蜀,刘开培,秦亮,等.电力电子化电力系统暂态稳定性分析综述[J].中国电机工程学报,2017,37(14):3948-3962.Zhu Shu,Liu Kaipei,Qin Liang,et al.Analysis of transient stability of power electronics dominated powersystem:an overview[J].Proceedings of the CSEE,2017,37(14):3948-3962(in Chinese).
[12]王旭斌,杜文娟,王海风.弱连接条件下并网VSC系统稳定性分析研究综述[J].中国电机工程学报,2018,38(6):1593-1604.Wang Xubin,Du Wenjuan,Wang Haifeng.Stability analysis of grid-tied VSC systems under weak connection condition an overview[J].Proceedings of the CSEE,2018,38(6):1593-1604(in Chinese).
[13]张琛,蔡旭,李征.具有自主电网同步与弱电网稳定运行能力的双馈风电机组控制方法[J].中国电机工程学报,2017,37(2):476-482.Zhang Chen,Cai Xu,Li Zheng.Control of DFIG-based wind turbines with the capability of automatic grid-synchronous and stable operation under weak grid condition[J].Proceedings of the CSEE,2017,37(2):476-482(in Chinese).
[14]Xi X Z,Geng H,Yang G.Enhanced model of the doubly fed induction generator-based wind farm for small-signal stability studies of weak power system[J].IET Renewable Power Generation,2014,8(7):765-774(in English).
[15]Egea-Alvarez A,Fekriasl S,Hassan F,et al.Advanced vector control for voltage source converters connected to weak girds[J].IEEE Transactions on Power System,2015,30(6):3072-3081(in Chinese).
[16]王姗姗,周孝信,汤广福,等.交流电网强度对模块化多电平换流器HVDC运行特性的影响[J].电网技术,2011,35(2):17-24.Wang Shanshan,Zhou Xiaoxin,Tang Guangfu,et al.Influence of ac system strength on operating characteristic of MMC-HVDC system[J].Power System Technology,2011,35(2):17-24(in Chinese).
[17]刘昇,徐政.联于弱交流系统的VSC-HVDC稳定运行区域研究[J].中国电机工程学报,2016,36(1):133-144.Liu Sheng,Xu Zheng.Study on stable operating region of VSC-HVDC connected to weak ac systems[J].Proceedings of the CSEE,2016,36(1):133-144(in Chinese).
[18]Zhang L D,Nee H P,Harnefors L.Analysis of stability limitations of a VSC-HVDC link using powersynchronization control[J].IEEE Transactions on Power System,2011,26(3):1326-1337(in English).
[19]Jenny Z Zhou,Hui Ding,Shengtao Fan.Impact of short-circuit ration and phase-locked loop parameters on the small-signal behavior of a VSC-HVDC converter[J].IEEE Transactions on Power Delivery,2014,29(5):2287-2296(in English).
[20]郭春义,宁琳如,刘炜,等.基于频率同步控制的VSC-HVDC在弱交流系统下的动态特性研究[J].中国电机工程学报,2017,37(15):4344-4354.Guo Chunyi,Lin Linru,Liu Wei,et al.Dynamics investigation of VSC-HVDC with frequency based synchronization control under weak ac grid condition[J].Proceedings of the CSEE,2017,37(15):4344-4354(in Chinese).
[21]苑宾,许建中,赵成勇,等.利用虚拟电阻提高接入弱交流电网的MMC小信号稳定性控制方法[J].中国电机工程学报,2015,35(15):3794-3802.Yuan Bin,Xu Jianzhong,Zhao Chengyong,et al.A virtual resistor based control strategy for enhancing the small-signal stability of MMC integrated in weak ac system[J].Proceedings of the CSEE,2015,35(15):3794-3802(in Chinese).
[22]吴广禄,周孝信,李亚楼,等.弱交流电网条件下VSC-HVDC改进矢量控制方法[J].中国电机工程学报,2017,37(16):4577-4590.Wu Guanglu,Zhou Xiaoxin,Li Yalou,et al.Improved vector control for VSC-HVDC connected to weak ac grids[J].Proceedings of the CSEE,2017,37(16):4577-4590(in Chinese).
[23]王烨,宁琳如,赵成勇,等.VSC-HVDC联接弱交流系统下的新型附加频率阻尼控制方法[J].中国电机工程学报,2018,38(10):2989-2998.Wang Ye,Ning Linru,Zhao Chenyong,et al.A novel supplementary frequency-based damping control for VSC-HVDC station connected to a weak ac grid[J].Proceedings of the CSEE,2018,38(10):2989-2998(in Chinese).
[24]刘昇,徐政,李文云,等.用于改善交流系统暂态稳定性的VSC-HVDC交流电压-频率协调控制策略[J].中国电机工程学报,2015,35(19):4879-4887.Liu Sheng,Xu Zheng,Li Wenyun,et al.VSC-HVDC ac voltage-frequency coordination control strategy for improving ac system transient stability[J].Proceedings of the CSEE,2015,35(19):4879-4887(in Chinese).
[25]Jiebei Zhu,Booth C D,Adam G P,et al.Inertia emulation control strategy for VSC-HVDC transmission systems[J].IEEE Transactions on Power System,2013,28(2):1277-1287(in English).
[26]Castro L M,Acha E.On the provision of frequency regulation in low inertia ac grids using HVDC systems[J].IEEE Transactions on Smart Grid,2016,7(6):2680-2690(in English).
[27]唐欣,张武其,陈胜,等.与VSC-HVDC连接的弱电网暂态频率偏移定量计算和调整方法[J].中国电机工程学报,2015,35(9):2170-2176.Tang Xin,Zhang Wuqi,Chen Sheng,et al.Assessment and regulation of transient frequency deviation in weak grid connected to VSC-HVDC[J].Proceedings of the CSEE,2015,35(9):2170-2176(in Chinese).
[28]郑超,腾松,宋新立,等.百万千瓦级柔性直流接入大连电网后的系统特性分析[J].中国电机工程学报,2013,37(15):15-19.Zheng Chao,Teng Song,Song Xinli,et al.Analysis on system characteristics after incorporation of?320kV/1000MW VSC-HVDC into dalian power grid[J].Automation of Electric Power Systems,2013,37(15):15-19(in Chinese).
[29]汤广福,庞辉,贺之渊.先进交直流输电技术在中国的发展与应用[J].中国电机工程学报,2016,36(7):1760-1771.Tang Guangfu,Pang Hui,He Zhiyuan.R&D and application of advanced power transmission technology in china[J].Proceedings of the CSEE,2016,36(7):1760-1771(in Chinese).
[30]万磊,汤涌,吴文传,等.基于模块化多电平换流器的高压直流电网机电暂态仿真模型[J].电网技术,2017,41(7):2085-2091.Wan Lei,Tang Yong,Wu Wenchuan,et al.Electromechanical transient model of HVDC grids based on modular multilevel converter[J].Power System Technology,2017,41(7):2085-2091(in Chinese).
[31]牟哲,同向前,孙伟.VSC-HVDC控制保护系统的设计与实验研究[J].智能电网,2017,5(4):334-341.Mu Zhe,Tong Xiangqian,Sun Wei.Design and experimental study of control and protection system for VSC-HVDC[J].Smart Grid,2017,5(4):334-341(in Chinese).
[32]罗永捷,李耀华,李子欣,等.全桥型MMC-HVDC直流短路故障穿越控制保护策略[J].中国电机工程学报,2016,36(7):1933-1943.Luo Yongjie,Li Yaohua,Li Zixin,et al.Dc short-circuit fault ride-through control strategy of full-bridge MMC-HVDC systems[J].Proceedings of the CSEE,2016,36(7):1933-1943(in Chinese).
[33]王奔.电力系统电压稳定性[M].北京:电子工业出版社,2008:13-17.Wang Ben.Power system voltage stability[M].Beijing:Electronic Industry Press,2008:13-17(in Chinese).
[2]刘振亚,张启平,董存,等.通过特高压直流实现大型能源基地风、光、火电力大规模高效率安全外送研究[J].中国电机工程学报,2014,34(16):2513-2522.Liu Zhenya,Zhang Qiping,Dong Cun,et al.Efficient and security transmission of wind,photovoltaic and thermal power of large-scale energy resource bases through UHVDC projects[J].Proceedings of the CSEE,2014,34(16):2513-2522(in Chinese).
[3]肖湘宁.新一代电网中多源多变换复杂交直流系统的基础问题[J].电工技术学报,2015,30(15):1-14.Xiao Xiangning.Basic problems of the new complex ac-dc power gird with multiple energy resources and multiple conversions[J].Transactions of China Electrotechnical Society,2015,30(15):1-14(in Chinese).
[4]盛万兴,段青,孟晓丽,等.电力电子化进程下的交直流无缝混合灵活配电系统研究[J].中国电机工程学报,2017,37(7):1877-1888.Sheng Wanxing,Duan Qing,Meng Xiaoli,et al.Research on the AC&DC seamless-hybrid fluent power distribution system following the power electronics evolution[J].Proceedings of the CSEE,2017,37(7):1877-1888(in Chinese).
[5]姜齐荣,王亮,谢小荣.电力电子化电力系统的振荡问题及其抑制措施研究[J].高电压技术,2017,43(4):1057-1066.Jiang Qirong,Wang Liang,Xie Xiaorong.Study on oscillations of power-electronized power system and their mitigation schemes[J].High Voltage Engineering,2017,43(4):1057-1066(in Chinese).
[6]陈国平,李明节,许涛,等.关于新能源发展的技术瓶颈研究[J].中国电机工程学报,2017,37(1):20-26.Chen Guoping,Li Mingjie,Xu Tao,et al.Study on technical bottleneck of new energy development[J].Proceedings of the CSEE,2017,37(1):20-26(in Chinese).
[7]李明节,于钊,许涛,等.新能源并网系统引发的复杂振荡问题及其对策研究[J].电网技术,2017,41(4):1035-2498.Li Mingjie,Yu Zhao,Xu Tao,et al.Study of complex oscillation caused by renewable energy integration and its solution[J].Power System Technology,2017,41(4):1035-1042(in Chinese).
[8]李明节.大规模特高压交直流混联电网特性分析与运行控制[J].电网技术,2016,40(4):985-991.Li Mingjie.Characteristic analysis and operational control of large-scale hybrid uhv ac/dc power grids[J].Power System Technology,2016,40(4):985-991(in Chinese).
[9]郑超,马世英,申旭辉,等.强直弱交的定义、内涵与形式及其应对措施[J].电网技术,2017,41(8):2491-2498.Zheng Chao,Ma Shiying,Shen Xuhui,et al.Definition,connotation and form of strong hvdc and weak ac and countermeasures for stable operation of hybrid power grid[J].Power System Technology,2017,41(8):2491-2498(in Chinese).
[10]袁小明,程时杰,胡家兵.电力电子化电力系统多尺度电压功角动态稳定问题[J].中国电机工程学报,2016,36(19):5145-5154.Yuan Xiaoming,Cheng Shijie,Hu Jiabin.Multi-time scale voltage and power angle dynamics in power electronics dominated large power systems[J].Proceedings of the CSEE,2016,36(19):5145-5154(in Chinese).
[11]朱蜀,刘开培,秦亮,等.电力电子化电力系统暂态稳定性分析综述[J].中国电机工程学报,2017,37(14):3948-3962.Zhu Shu,Liu Kaipei,Qin Liang,et al.Analysis of transient stability of power electronics dominated powersystem:an overview[J].Proceedings of the CSEE,2017,37(14):3948-3962(in Chinese).
[12]王旭斌,杜文娟,王海风.弱连接条件下并网VSC系统稳定性分析研究综述[J].中国电机工程学报,2018,38(6):1593-1604.Wang Xubin,Du Wenjuan,Wang Haifeng.Stability analysis of grid-tied VSC systems under weak connection condition an overview[J].Proceedings of the CSEE,2018,38(6):1593-1604(in Chinese).
[13]张琛,蔡旭,李征.具有自主电网同步与弱电网稳定运行能力的双馈风电机组控制方法[J].中国电机工程学报,2017,37(2):476-482.Zhang Chen,Cai Xu,Li Zheng.Control of DFIG-based wind turbines with the capability of automatic grid-synchronous and stable operation under weak grid condition[J].Proceedings of the CSEE,2017,37(2):476-482(in Chinese).
[14]Xi X Z,Geng H,Yang G.Enhanced model of the doubly fed induction generator-based wind farm for small-signal stability studies of weak power system[J].IET Renewable Power Generation,2014,8(7):765-774(in English).
[15]Egea-Alvarez A,Fekriasl S,Hassan F,et al.Advanced vector control for voltage source converters connected to weak girds[J].IEEE Transactions on Power System,2015,30(6):3072-3081(in Chinese).
[16]王姗姗,周孝信,汤广福,等.交流电网强度对模块化多电平换流器HVDC运行特性的影响[J].电网技术,2011,35(2):17-24.Wang Shanshan,Zhou Xiaoxin,Tang Guangfu,et al.Influence of ac system strength on operating characteristic of MMC-HVDC system[J].Power System Technology,2011,35(2):17-24(in Chinese).
[17]刘昇,徐政.联于弱交流系统的VSC-HVDC稳定运行区域研究[J].中国电机工程学报,2016,36(1):133-144.Liu Sheng,Xu Zheng.Study on stable operating region of VSC-HVDC connected to weak ac systems[J].Proceedings of the CSEE,2016,36(1):133-144(in Chinese).
[18]Zhang L D,Nee H P,Harnefors L.Analysis of stability limitations of a VSC-HVDC link using powersynchronization control[J].IEEE Transactions on Power System,2011,26(3):1326-1337(in English).
[19]Jenny Z Zhou,Hui Ding,Shengtao Fan.Impact of short-circuit ration and phase-locked loop parameters on the small-signal behavior of a VSC-HVDC converter[J].IEEE Transactions on Power Delivery,2014,29(5):2287-2296(in English).
[20]郭春义,宁琳如,刘炜,等.基于频率同步控制的VSC-HVDC在弱交流系统下的动态特性研究[J].中国电机工程学报,2017,37(15):4344-4354.Guo Chunyi,Lin Linru,Liu Wei,et al.Dynamics investigation of VSC-HVDC with frequency based synchronization control under weak ac grid condition[J].Proceedings of the CSEE,2017,37(15):4344-4354(in Chinese).
[21]苑宾,许建中,赵成勇,等.利用虚拟电阻提高接入弱交流电网的MMC小信号稳定性控制方法[J].中国电机工程学报,2015,35(15):3794-3802.Yuan Bin,Xu Jianzhong,Zhao Chengyong,et al.A virtual resistor based control strategy for enhancing the small-signal stability of MMC integrated in weak ac system[J].Proceedings of the CSEE,2015,35(15):3794-3802(in Chinese).
[22]吴广禄,周孝信,李亚楼,等.弱交流电网条件下VSC-HVDC改进矢量控制方法[J].中国电机工程学报,2017,37(16):4577-4590.Wu Guanglu,Zhou Xiaoxin,Li Yalou,et al.Improved vector control for VSC-HVDC connected to weak ac grids[J].Proceedings of the CSEE,2017,37(16):4577-4590(in Chinese).
[23]王烨,宁琳如,赵成勇,等.VSC-HVDC联接弱交流系统下的新型附加频率阻尼控制方法[J].中国电机工程学报,2018,38(10):2989-2998.Wang Ye,Ning Linru,Zhao Chenyong,et al.A novel supplementary frequency-based damping control for VSC-HVDC station connected to a weak ac grid[J].Proceedings of the CSEE,2018,38(10):2989-2998(in Chinese).
[24]刘昇,徐政,李文云,等.用于改善交流系统暂态稳定性的VSC-HVDC交流电压-频率协调控制策略[J].中国电机工程学报,2015,35(19):4879-4887.Liu Sheng,Xu Zheng,Li Wenyun,et al.VSC-HVDC ac voltage-frequency coordination control strategy for improving ac system transient stability[J].Proceedings of the CSEE,2015,35(19):4879-4887(in Chinese).
[25]Jiebei Zhu,Booth C D,Adam G P,et al.Inertia emulation control strategy for VSC-HVDC transmission systems[J].IEEE Transactions on Power System,2013,28(2):1277-1287(in English).
[26]Castro L M,Acha E.On the provision of frequency regulation in low inertia ac grids using HVDC systems[J].IEEE Transactions on Smart Grid,2016,7(6):2680-2690(in English).
[27]唐欣,张武其,陈胜,等.与VSC-HVDC连接的弱电网暂态频率偏移定量计算和调整方法[J].中国电机工程学报,2015,35(9):2170-2176.Tang Xin,Zhang Wuqi,Chen Sheng,et al.Assessment and regulation of transient frequency deviation in weak grid connected to VSC-HVDC[J].Proceedings of the CSEE,2015,35(9):2170-2176(in Chinese).
[28]郑超,腾松,宋新立,等.百万千瓦级柔性直流接入大连电网后的系统特性分析[J].中国电机工程学报,2013,37(15):15-19.Zheng Chao,Teng Song,Song Xinli,et al.Analysis on system characteristics after incorporation of?320kV/1000MW VSC-HVDC into dalian power grid[J].Automation of Electric Power Systems,2013,37(15):15-19(in Chinese).
[29]汤广福,庞辉,贺之渊.先进交直流输电技术在中国的发展与应用[J].中国电机工程学报,2016,36(7):1760-1771.Tang Guangfu,Pang Hui,He Zhiyuan.R&D and application of advanced power transmission technology in china[J].Proceedings of the CSEE,2016,36(7):1760-1771(in Chinese).
[30]万磊,汤涌,吴文传,等.基于模块化多电平换流器的高压直流电网机电暂态仿真模型[J].电网技术,2017,41(7):2085-2091.Wan Lei,Tang Yong,Wu Wenchuan,et al.Electromechanical transient model of HVDC grids based on modular multilevel converter[J].Power System Technology,2017,41(7):2085-2091(in Chinese).
[31]牟哲,同向前,孙伟.VSC-HVDC控制保护系统的设计与实验研究[J].智能电网,2017,5(4):334-341.Mu Zhe,Tong Xiangqian,Sun Wei.Design and experimental study of control and protection system for VSC-HVDC[J].Smart Grid,2017,5(4):334-341(in Chinese).
[32]罗永捷,李耀华,李子欣,等.全桥型MMC-HVDC直流短路故障穿越控制保护策略[J].中国电机工程学报,2016,36(7):1933-1943.Luo Yongjie,Li Yaohua,Li Zixin,et al.Dc short-circuit fault ride-through control strategy of full-bridge MMC-HVDC systems[J].Proceedings of the CSEE,2016,36(7):1933-1943(in Chinese).
[33]王奔.电力系统电压稳定性[M].北京:电子工业出版社,2008:13-17.Wang Ben.Power system voltage stability[M].Beijing:Electronic Industry Press,2008:13-17(in Chinese).