基于转矩法的双馈风电场经柔直并网系统次同步振荡分析Analysis of Sub-synchronous Oscillation of DFIG-based Wind Farm Integrated to Grid Through VSC-HVDC System Based on Torque Method
宋斯珩;赵书强;
摘要(Abstract):
从电磁转矩角度研究双馈风电场经柔直并网系统的次同步振荡。首先推导电磁转矩与转速之间的幅频关系,发现定子电流受柔直控制器影响,即通过电磁转矩实现风机与柔直的耦合;然后分析该模型电磁转矩的频率响应,分析结果表明在特定频率范围内电磁转矩呈现负阻尼特性引起系统次同步振荡;基于转矩的幅频响应,进一步研究柔直控制器参数和稳态工况对系统稳定性的影响,结果表明增加控制器的比例系数和减少积分增益都对系统稳定性不利;最后通过PSCAD/EMTDC时域仿真验证理论分析的正确性。
关键词(KeyWords): 双馈风机;柔性直流输电系统;转矩分析法;频率响应;阻尼特性
基金项目(Foundation): 河北省自然科学基金(E2017502075);; 中央高校基本科研业务费重点项目(2018ZD001)~~
作者(Author): 宋斯珩;赵书强;
Email:
DOI: 10.13335/j.1000-3673.pst.2019.0182
参考文献(References):
- [1]周孝信,陈树勇,鲁宗相,等.能源转型中我国新一代电力系统的技术特征[J].中国电机工程学报,2018,38(7):1893-1904.Zhou Xiaoxin,Chen Shuyong,Lu Zongxiang,et al.Technology features of the new generation power-system in China[J].Proceedings of the CSEE,2018,38(7):1893-1904(in Chinese).
- [2]谢小荣,刘华坤,贺静波,等.电力系统新型振荡问题浅析[J].中国电机工程学报,2018,38(10):2821-2828.Xie Xiaorong,Liu Huakun,He Jingbo,et al.On new oscillation issues of power system[J].Proceedings of the CSEE,2018,38(10):2821-2828(in Chinese).
- [3]肖湘宁,罗超,廖坤玉.新能源电力系统次同步振荡问题研究综述[J].电工技术学报,2017,32(6):85-97.Xiao Xiangning,Luo Chao,Liao Kunyu.Review of the research on sub-synchronous oscillation issues-in electric power system with renewable energy sources[J].Transactions of China Electrotechnical Society,2017,32(6):85-97(in Chinese).
- [4]迟永宁,梁伟,蔡旭,等.大规模海上风电输电与并网关键技术研究综述[J].中国电机工程学报,2016,36(14):3758-3770.Chi Yongning,Liang Wei,Cai Xu,et al.An overview on key technologies regarding power transmission and grid integration of large scale offshore wind power[J].Proceedings of the CSEE,2016,36(14):3758-3770(in Chinese).
- [5]陈树勇,徐林岩,孙栩.基于多端柔性直流输电的风电并网控制研究[J].中国电机工程学报,2014,34(S):32-38.Chen Shuyong,Xu Linyan,Sun Xu.The control of wind power integration based on multi-terminal high voltage DC transmission with voltage source converter[J].Proceedings of the CSEE,2014,34(S):32-38(in Chinese).
- [6]王毅,朱晓荣,赵书强.风力发电系统的建模与仿真[M].北京:中国水利水电出版社,2015:57,166.
- [7]孙焜,姚伟,文劲宇.双馈风电场经柔直并网系统次同步振荡机理及特性研究[J].中国电机工程学报,2018,38(22):6520-6532.Sun Kun,Yao Wei,Wen Jingyu.Mechanism and characteristics analysis of sub-synchronous oscillation caused by DFIG-based wind farm integrated into grid through VSC-HVDC system[J].Proceedings of the CSEE,2018,38(22):6520-6532(in Chinese).
- [8]解大,冯俊淇,娄宇成,等.基于三质量块模型的双馈风机小信号建模和模态分析[J].中国电机工程学报,2013,33(S):21-29.Xie Da,Feng Junqi,Lou Yucheng,et al.Small-signal modeling and modal analysis of DFIG-based wind turbine based on three-mass shaft model[J].Proceedings of the CSEE,2013,33(S):21-29(in Chinese).
- [9]薛安成,吴雨,王子哲,等.次同步扰动下的双馈风机系统多频率响应分析[J].电网技术,2018,42(6):1804-1810.Xue Ancheng,Wu Yu,Wang Zizhe,et al.Analysis of frequency response of DFIG system under sub-synchronous disturbance[J].Power System Technology,2018,42(6):1804-1810(in Chinese).
- [10]谢小荣,刘华坤,贺静波,等.直驱风机风电场与交流电网相互作用引发次同步振荡的机理与特性分析[J].中国电机工程学报,2016,36(9):2366-2372.Xie Xiaorong,Liu Huakun,He Jingbo,et al.Mechanism and characteristics of sub-synchronous oscillation caused by the interaction between full-converter wind turbines and AC systems[J].Proceedings of the CSEE,2016,36(9):2366-2372(in Chinese).
- [11] Fan L L,Miao Z X.An explanation of oscillations due to wind power plants weak grid interconnection[J].IEEE Transaction on Sustainable Energy,2018,9(1):488-490.
- [12] Fan L L.Modeling type-4 wind in weak grids[J].IEEE Transactions on Sustainable Energy,2019,10(2):853-864.
- [13] Cespedes M, Sun J. Impedance modeling and analysis of grid-connected voltage-source converters[J].IEEE Transactions on Power Electronics,2014,29(3):1254-1261.
- [14] Muljadi E, Parsons B. Comparing single and multiple turbine representations in a wind farm simulation[C]//Wind Energy Conference.Athens, Greece:Wind Energy Conference,2006:142-147.
- [15]贺益康,胡家兵,徐烈.并网双馈异步风力发电机运行控制[M].北京:中国电力出版社,2012:88.
- [16]董晓亮,谢小荣,韩英铎,等.基于定转子转矩分析法的双馈风机次同步谐振机理研究[J].中国电机工程学报,2015,35(19):4861-4869.Dong Xiaoliang,Xie Xiaorong,Han Yingduo,et al.Mechanism study of DFIG-related SSR based on separate stator and rotor torque analysis[J].Proceedings of the CSEE,2015,35(19):4861-4869(in Chinese).