渝鄂背靠背柔性直流对系统次同步振荡特性的影响分析
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摘要
分析渝鄂背靠背柔性直流输电工程投运前后奉节电厂发生次同步振荡的潜在因素;利用复转矩系数法与时域仿真相结合的方法计算分析工程投运前后各个频段系统阻尼特性,并从机理上分析工程投运前后奉节机组发生次同步振荡的风险。在此基础上,利用柔性直流的多维度可控、灵活快速的控制特性,设计混合式阻尼控制策略。对典型工况进行仿真,结果表明所提控制策略相比传统控制策略能够使系统更快恢复到稳态。
The potential factors causing subsynchronous oscillation in Fengjie plants are analyzed before and after the operation of back-to back flexible HVDC transmission project connecting Chongqing and Hubei Power Grid. The damping characteristics of system in each frequency band are analyzed by complex torque coefficient approach combined with time-domain simulation,and the risk of sub-synchronous oscillation of Fenjie plants before and after the project operation is analyzed in terms of mechanism. On this basis,a hybrid damping control strategy is designed using multi-dimensional controllable characteristic,flexible and fast control characteristic of flexible HVDC. The ty-pical working conditions are simulated,and results show that the proposed control strategy can make the system recover to steady state more quickly than the traditional control strategy.
The potential factors causing subsynchronous oscillation in Fengjie plants are analyzed before and after the operation of back-to back flexible HVDC transmission project connecting Chongqing and Hubei Power Grid. The damping characteristics of system in each frequency band are analyzed by complex torque coefficient approach combined with time-domain simulation,and the risk of sub-synchronous oscillation of Fenjie plants before and after the project operation is analyzed in terms of mechanism. On this basis,a hybrid damping control strategy is designed using multi-dimensional controllable characteristic,flexible and fast control characteristic of flexible HVDC. The ty-pical working conditions are simulated,and results show that the proposed control strategy can make the system recover to steady state more quickly than the traditional control strategy.
引文
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[12] 张鹏,毕天姝.HVDC 引起次同步振荡暂态扰动风险的机理分析[J].中国电机工程学报,2016,36(4):961-968.ZHANG Peng,BI Tianshu.Mechanism analysis of large disturbance riskof subsynchronous oscillation caused by HVDC[J].Proceedings of the CSEE,2016,36(4):961-968.
[13] 郑蕤,肖湘宁,郭春林,等.伊冯/呼辽交直流系统的次同步振荡阻尼特性分析[J].电网技术,2011,35(10):41-46.ZHENG Rui,XIAO Xiangning,GUO Chunlin,et al.Analysis on dam-ping characteristic of subsynchronous oscillation in AC/DC power grid consisting of 500 kV AC power transmission from Yimin to Fengtunand ±500 kV DC power transmission from Hulunbuir to Liaoning[J].Power System Technology,2011,35(10):41-46.
[14] YIN C C,AGALGAONKAR A P,MUTTAQI K M,et al.Subsynchronous torsional behaviour of a hydraulic turbine-generator unit connected to a HVDC system[C]//Power Engineering Conference.Sydney,Australia:IEEE,2008:1-6.
[15] 高本锋,赵成勇,肖湘宁,等.高压直流输电系统附加次同步振荡阻尼控制器的设计与实现[J].高电压技术,2010,36(2):501-506.GAO Benfeng,ZHAO Chengyong,XIAO Xiangning,et al.Design and implementation of SSDC for HVDC[J].High Voltage Engineering,2010,36(2):501-506.
[16] 赵睿,李兴源,刘天琪,等.抑制次同步和低频振荡的多通道直流附加阻尼控制器设计[J].电力自动化设备,2014,34(3):89-92.ZHAO Rui,LI Xingyuan,LIU Tianqi,et al.Design of multi-channel DC supplementary damping controllerfor subsynchronous and low-frequency oscillation suppression[J].Electric Power Automation Equipment,2014,34(3):89-92.
[17] 张帆,徐政.直流输电次同步阻尼控制器的设计[J].电网技术,2008,32(11):13-17.ZHANG Fan,XU Zheng.A method to design a subsynchronous dam-ping controller for HVDC transmission system[J].Power System Technology,2008,32(11):13-17.
[18] 时伯年,李树鹏,梅红明,等.含常规直流和柔性直流的交直流混合系统次同步振荡抑制研究[J].电力系统保护与控制,2016,44(20):113-117.SHI Bonian,LI Shupeng,MEI Hongming,et al.Research on the SSO restraining of hybrid system containing LCC_HVDC and VSC_HVDC[J].Power System Protection and Control,2016,44(20):113-117.
[19] 周小兵,林常青,魏威.华中与川渝联网低频振荡仿真计算研究[J].华中电力,2004,17(1):4-7.ZHOU Xiaobing,LIN Changqing,WEI Wei.The researeh on low frequeney oseillations calculations of inter linked grid of Central China Power Grid and ChuanYu Power Grid[J].Central China Electric Power,2004,17(1):4-7.
[20] 程时杰,曹一家,江全元.电力系统次同步谐振的理论与方法[M].北京:科学技术出版社,2009:68-100.
[21] BLADH J,SUNDQVIST P,LUNDIN U.Torsional stability of hydropower units under influence of subsynchronous oscillations[J].IEEE Transactions on Power Systems,2013,28(4):3826-3833.
[22] 李宽,李兴源,陈实,等.光伏并网抑制由直流输电引起的次同步振荡的可行性分析[J].电力自动化设备,2015,35(3):41-45.LI Kuan,LI Xingyuan,CHEN Shi,et al.Analysis on feasibility of damping HVDC-induced subsynchronous oscillation byphotovoltaic grid-connection[J].Electric Power Automation Equipment,2015,35(3):41-45.
[23] 徐政.复转矩系数法的适用性分析及其时域仿真实现[J].中国电机工程学报,2000,20(6):1-4.XU Zheng.The complex torque coefficient approach’s applicability analysis and its realization by time domain simulation[J].Procee-dings of the CSEE,2000,20(6):1-4.
[24] 徐友平,张珂,潘晓杰,等.渝鄂背靠背柔性直流附加阻尼控制策略研究[J].电力系统保护与控制,2016,44(18):164-165.XU Youping,ZHANG Ke,PAN Xiaojie,et al.Damping control based on back to back VSC-HVDC connecting Chongqing and Hubei Power Grid[J].Power System Protection and Control,2016,44(18):164-165.
[2] 董云龙,凌卫家,田杰,等.舟山多端柔性直流输电控制保护系统[J].电力自动化设备,2016,36(7):169-173.DONG Yunlong,LING Weijia,TIAN Jie,et al.Control & protection system for Zhoushan multi-terminal VSC-HVDC[J].Electric Power Automation Equipment,2016,36(7):169-173.
[3] 李云丰,汤广福,贺之渊,等.MMC型直流输电系统阻尼控制策略研究[J].中国电机工程学报,2016,36(20):5492-5502.LI Yunfeng,TANG Guangfu,HE Zhiyuan,et al.Damping control strategy research for MMC based HVDC system[J].Proceedings of the CSEE,2016,36(20):5492-5502.
[4] MAJID M,EDRIS P,SASAN Z,et al.Dynamic model,control and stability analysis of MMC in HVDC transmission systems[J].IEEE Transactions on Power Delivery,2017,32(3):1471-1482.
[5] IEEE Committee Report.A bibliography for the study of sub-synchronous resonance between rotating machines and power systems[J].IEEE Transactions on Power Apparatus and Systems,1976,95(1):216-218.
[6] 谢小荣,郭锡玖,吴景龙.基于电力电子变流器的机端次同步阻尼控制器研究与测试[J].中国电机工程学报,2014,34(4):666-671.XIE Xiaorong,GUO Xijiu,WU Jinglong.Research and test of a ge-nerator terminal subsynchronous damping controller based on power electronic converter[J].Proceedings of the CSEE,2014,34(4):666-671.
[7] 李晨,孙海顺,朱鑫要,等.降低次同步谐振风险的大型火电基地经串补线路送出规划和运行方案[J].电网技术,2014,38(1):113-119.LI Chen,SUN Haishun,ZHU Xinyao,et al.Planning and operation schemes for reducing SSR risk of outward power transmission of large-scale thermal generation bases via transmission line with series compensation[J].Power System Technology,2014,38(1):113-119.
[8] BHIM S,MADHUSUNDAN S,TANDON A K,et al.Transient performance of series-compensated three-phase self-excited induction generator feeding dynamic loads[J].IEEE Transactions on Industry Applications,2010,46(4):1271-1280.
[9] 高本锋,李忍,杨大业,等.双馈风电机组次同步振荡阻尼特性与抑制策略[J].电力自动化设备,2015,35(12):11-20.GAO Benfeng,LI Ren,YANG Daye,et al.Damping characteristics and counter measure of DFIG sub-synchronous oscillation[J].Electric Power Automation Equipment,2015,35(12):11-20.
[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 cha-racteristics of subsynchronous oscillation caused by the interaction between full-converter wind turbines and AC systems[J].Procee-dings of the CSEE,2016,36(9):2366-2372.
[11] 高本锋,张学伟,李忍.大规模风电送出系统的次同步振荡问题研究综述[J].电气工程学报,2015,10(7):1-10.GAO Benfeng,ZHANG Xuewei,LI Ren.Studies of sub-synchronous oscillation in system with large-scale wind power transmission[J].Journal of Electrical Engineering,2015,10(7):1-10.
[12] 张鹏,毕天姝.HVDC 引起次同步振荡暂态扰动风险的机理分析[J].中国电机工程学报,2016,36(4):961-968.ZHANG Peng,BI Tianshu.Mechanism analysis of large disturbance riskof subsynchronous oscillation caused by HVDC[J].Proceedings of the CSEE,2016,36(4):961-968.
[13] 郑蕤,肖湘宁,郭春林,等.伊冯/呼辽交直流系统的次同步振荡阻尼特性分析[J].电网技术,2011,35(10):41-46.ZHENG Rui,XIAO Xiangning,GUO Chunlin,et al.Analysis on dam-ping characteristic of subsynchronous oscillation in AC/DC power grid consisting of 500 kV AC power transmission from Yimin to Fengtunand ±500 kV DC power transmission from Hulunbuir to Liaoning[J].Power System Technology,2011,35(10):41-46.
[14] YIN C C,AGALGAONKAR A P,MUTTAQI K M,et al.Subsynchronous torsional behaviour of a hydraulic turbine-generator unit connected to a HVDC system[C]//Power Engineering Conference.Sydney,Australia:IEEE,2008:1-6.
[15] 高本锋,赵成勇,肖湘宁,等.高压直流输电系统附加次同步振荡阻尼控制器的设计与实现[J].高电压技术,2010,36(2):501-506.GAO Benfeng,ZHAO Chengyong,XIAO Xiangning,et al.Design and implementation of SSDC for HVDC[J].High Voltage Engineering,2010,36(2):501-506.
[16] 赵睿,李兴源,刘天琪,等.抑制次同步和低频振荡的多通道直流附加阻尼控制器设计[J].电力自动化设备,2014,34(3):89-92.ZHAO Rui,LI Xingyuan,LIU Tianqi,et al.Design of multi-channel DC supplementary damping controllerfor subsynchronous and low-frequency oscillation suppression[J].Electric Power Automation Equipment,2014,34(3):89-92.
[17] 张帆,徐政.直流输电次同步阻尼控制器的设计[J].电网技术,2008,32(11):13-17.ZHANG Fan,XU Zheng.A method to design a subsynchronous dam-ping controller for HVDC transmission system[J].Power System Technology,2008,32(11):13-17.
[18] 时伯年,李树鹏,梅红明,等.含常规直流和柔性直流的交直流混合系统次同步振荡抑制研究[J].电力系统保护与控制,2016,44(20):113-117.SHI Bonian,LI Shupeng,MEI Hongming,et al.Research on the SSO restraining of hybrid system containing LCC_HVDC and VSC_HVDC[J].Power System Protection and Control,2016,44(20):113-117.
[19] 周小兵,林常青,魏威.华中与川渝联网低频振荡仿真计算研究[J].华中电力,2004,17(1):4-7.ZHOU Xiaobing,LIN Changqing,WEI Wei.The researeh on low frequeney oseillations calculations of inter linked grid of Central China Power Grid and ChuanYu Power Grid[J].Central China Electric Power,2004,17(1):4-7.
[20] 程时杰,曹一家,江全元.电力系统次同步谐振的理论与方法[M].北京:科学技术出版社,2009:68-100.
[21] BLADH J,SUNDQVIST P,LUNDIN U.Torsional stability of hydropower units under influence of subsynchronous oscillations[J].IEEE Transactions on Power Systems,2013,28(4):3826-3833.
[22] 李宽,李兴源,陈实,等.光伏并网抑制由直流输电引起的次同步振荡的可行性分析[J].电力自动化设备,2015,35(3):41-45.LI Kuan,LI Xingyuan,CHEN Shi,et al.Analysis on feasibility of damping HVDC-induced subsynchronous oscillation byphotovoltaic grid-connection[J].Electric Power Automation Equipment,2015,35(3):41-45.
[23] 徐政.复转矩系数法的适用性分析及其时域仿真实现[J].中国电机工程学报,2000,20(6):1-4.XU Zheng.The complex torque coefficient approach’s applicability analysis and its realization by time domain simulation[J].Procee-dings of the CSEE,2000,20(6):1-4.
[24] 徐友平,张珂,潘晓杰,等.渝鄂背靠背柔性直流附加阻尼控制策略研究[J].电力系统保护与控制,2016,44(18):164-165.XU Youping,ZHANG Ke,PAN Xiaojie,et al.Damping control based on back to back VSC-HVDC connecting Chongqing and Hubei Power Grid[J].Power System Protection and Control,2016,44(18):164-165.