特高压直流分层馈入系统大扰动层间耦合特性及稳定控制
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摘要
特高压直流分层馈入系统具有新型拓扑结构,除传统交直流耦合路径外,还具有层间直流、层间交流耦合新路径,因此,大扰动冲击下其动态行为更为复杂。该文首先建立了特高压直流分层馈入系统机电暂态仿真模型,针对2类具有不同特征的扰动形态,利用大扰动激励法,揭示了直流分层馈入系统非线性功率响应特性,分析了不同耦合路径作用特征,评估了交流电气参量对功率特性的影响,针对存在的换相失败和电压失稳2种威胁,提出了换相失败预测联动控制策略和电压稳定紧急控制策略。面向测试系统和扎青特高压直流分层馈入受端电网,通过大扰动时域仿真,验证了控制策略的有效性。
Apart from the conventional coupling path between AC and DC, the UHVDC transmission with hierarchical connection mode also has the AC and AC, DC and DC coupling paths between different layers. So its dynamic behavior of a large disturbance will be more complex than the conventional UHVDC. In this paper, the electromechanical transient model of the hierarchical UHVDC was established firstly. For two types of fault with different features, by using the large disturbance excitation method(LDEM), the nonlinear power response characteristics of hierarchical UHVDC feeding system were revealed, the interaction mechanism and the degree of action of different coupling paths were analyzed. The influence of different factors on the nonlinear power characteristics was evaluated. Aiming to the threats of commutation failure and voltage instability, the control strategies of commutation failure prediction linkage controlling and active power emergency controlling were proposed.Simulation results got from the test system and the Sandong receiving end system with Zalute-Qingzhou hierarchical UHVDC connected verified the effectiveness of the control strategies.
Apart from the conventional coupling path between AC and DC, the UHVDC transmission with hierarchical connection mode also has the AC and AC, DC and DC coupling paths between different layers. So its dynamic behavior of a large disturbance will be more complex than the conventional UHVDC. In this paper, the electromechanical transient model of the hierarchical UHVDC was established firstly. For two types of fault with different features, by using the large disturbance excitation method(LDEM), the nonlinear power response characteristics of hierarchical UHVDC feeding system were revealed, the interaction mechanism and the degree of action of different coupling paths were analyzed. The influence of different factors on the nonlinear power characteristics was evaluated. Aiming to the threats of commutation failure and voltage instability, the control strategies of commutation failure prediction linkage controlling and active power emergency controlling were proposed.Simulation results got from the test system and the Sandong receiving end system with Zalute-Qingzhou hierarchical UHVDC connected verified the effectiveness of the control strategies.
引文
[1]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).
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[6]辛焕海,章枫,于洋,等.多馈入直流系统广义短路比:定义与理论分析[J].中国电机工程学报,2016,36(3):633-647.Xin Huanhai,Zhang Feng,Yu Yang,et al.Generalized short circuit ratio for multi-infeed dc system:definition and theoretical analysis[J].Proceedings of the CSEE,2016,36(3):633-647(in Chinese).
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[9]蒲莹,厉璇,马玉龙,等.网侧分层接入500kV/1000kV交流电网的特高压直流系统控制保护方案[J].电网技术,2016,40(10):3081-3087.Pu Ying,Li Xuan,Ma Yulong,et al.Control and protection system scheme on UHVDC with hierarchical connection to 500k V/1000k V AC systems[J].Power System Technology,2016,40(10):3081-3087(in Chinese).
[10]刘孝辉,赵森林,阮思烨,等.受端分层特高压直流阀区保护优化策略[J].电网技术,2017,41(8):2423-2428.Liu Xiaohui,Zhao Senlin,Ruan Siye,et al.Optimal strategies of valve protection of UHVDC with hierarchical connection structure[J].Power System Technology,2017,41(8):2423-2428(in Chinese).
[11]卢东斌,王永平,王振曦,等.分层接入方式的特高压直流输电逆变侧最大触发延迟角控制[J].中国电机工程学报,2016,36(7):1808-1816.Lu Dongbin,Wang Yongping,Wang Zhenxi,et al.Inverter maximum alpha control in UHVDC transmission with hierarchical connection mode[J].Proceedings of the CSEE,2016,36(7):1808-1816(in Chinese).
[12]汤奕,陈斌,皮景创,等.特高压直流分层接入方式下受端交流系统接纳能力分析[J].中国电机工程学报,2016,36(7):1790-1800.Tang Yi,Chen Bin,Pi Jingchuang,et al.Analysis on absorbing ability of receiving AC system for UHVDChierarchical connection to AC grid[J].Proceedings of the CSEE,2016,36(7):1790-1800(in Chinese).
[13]汤奕,陈斌,王琦,等.特高压直流分层接入下混联系统无功电压耦合特性分析[J].电网技术,2016,40(4):1005-1011.Tang Yi,Chen Bin,Wang Qi,et al.Analysis on reactive power and voltage coupling characteristics of hybrid system for UHVDC hierarchical connection to ACgrid[J].Power System Technology,2016,40(4):1005-1011(in Chinese).
[14]付蓉,周振凯,汤奕,等.特高压直流分层接入方式下换流母线电压的稳定性[J].高电压技术,2017,43(12):4103-4111.Fu Rong,Zhou Zhenkai,Tang Yi,et al.Voltage stability of converter buses of UHVDC hierarchical connection to AC grid[J].High Voltage Engineering,2017,43(12):4103-4111(in Chinese).
[15]郭龙,刘崇茹,贠飞龙,等.?1100kV直流系统分层接入方式下的功率协调控制[J].电力系统自动化,2015,39(11):24-30.Guo Long,Liu Chongru,Yun Feilong,et al.Power coordination control?1100k V UHVDC system with hierarchical connection mode[J].Automation of Electric Power Systems,2015,39(11):24-30(in Chinese).
[16]熊永新,沈郁,姚伟,等.?1100kV特高压直流分层接入方式下改进附加功率协调控制策略[J].电网技术,2017,41(11):3448-3456.Xiong Yongxin,Shen Yu,Yao Wei,et al.Improved additional power coordinated control of?1100kVUHVDC system with hierarchical connection grid[J].Power System Technology,2017,41(11):3448-3456(in Chinese).
[17]林伟芳,易俊,汤涌,等.分层直流短路比的定义和应用[J].中国电机工程学报,2017,37(22):6627-6635.Lin Weifang,Yi Jun,Tang Yong,et al.Definition and application of hierarchical infeed DC short circuit ratio[J].Proceedings of the CSEE,2017,37(22):6627-6635(in Chinese).
[18]周长春,徐政.直流输电准稳态模型有效性的仿真验证[J].电网技术,2003,23(12):33-36.Zhou Changchun,Xu Zheng.Simulation validity test of the HVDC quasi-steady-state model[J].Proceedings of the CSEE,2003,23(12):33-36(in Chinese).
[19]万磊,汤涌,吴文传,等.特高压直流控制系统机电暂态等效建模与参数实测方法[J].电网技术,2017,41(3):709-714.Wan Lei,Tang Yong,Wu Wenchuan,et al.Equivalent modeling and real parameter measurement methods of control systems of UHVDC transmission systems[J].Power System Technology,2017,41(3):709-714(in Chinese).
[20]万磊,丁辉,刘文焯.基于实际工程的直流输电控制系统仿真模型[J].电网技术,2013,37(3):629-634.Wan Lei,Ding Hui,Liu Wenzhuo.Simulation model of control system for HVDC power transmission based on actual project[J].Power System Technology,2013,37(3):629-634(in Chinese).
[2]张文亮,于永清,李光范,等.特高压直流技术研究[J].中国电机工程学报,2007,27(22):1-7.Zhang Wenliang,Yu Yongqing,Li Guangfan,et al.Researches on UHVDC technology[J].Proceedings of the CSEE,2007,27(22):1-7(in Chinese).
[3]郑超,汤涌,马世英,等.直流参与稳定控制的典型场景及技术需求[J].中国电机工程学报,2014,34(22):3750-3759.Zheng Chao,Tang Yong,Ma Shiying,et al.A survey on typical scenarios and technology needs for HVDCparticipated into stability control[J].Proceedings of the CSEE,2014,34(22):3750-3759(in Chinese).
[4]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).
[5]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,2014,40(4):985-991(in Chinese).
[6]辛焕海,章枫,于洋,等.多馈入直流系统广义短路比:定义与理论分析[J].中国电机工程学报,2016,36(3):633-647.Xin Huanhai,Zhang Feng,Yu Yang,et al.Generalized short circuit ratio for multi-infeed dc system:definition and theoretical analysis[J].Proceedings of the CSEE,2016,36(3):633-647(in Chinese).
[7]刘振亚,秦晓辉,赵良,等.特高压直流分层接入方式在多馈入直流电网的应用研究[J].中国电机工程学报,2013,33(10):1-7.Liu Zhenya,Qin Xiaohui,Zhao Liang,et al.Study on the application of UHVDC hierarchical connection mode to multi-infeed HVDC system[J].Proceedings of the CSEE,2013,33(10):1-7(in Chinese).
[8]李少华,王秀丽,张望,等.特高压直流分层接入交流电网方式下直流控制系统设计[J].中国电机工程学报,2015,35(10):2409-2416.Li Shaohua,Wang Xiuli,Zhang Wang,et al.Control system design for UHVDC hierarchical connection to ACgrid[J].Proceedings of the CSEE,2015,35(10):2409-2416(in Chinese).
[9]蒲莹,厉璇,马玉龙,等.网侧分层接入500kV/1000kV交流电网的特高压直流系统控制保护方案[J].电网技术,2016,40(10):3081-3087.Pu Ying,Li Xuan,Ma Yulong,et al.Control and protection system scheme on UHVDC with hierarchical connection to 500k V/1000k V AC systems[J].Power System Technology,2016,40(10):3081-3087(in Chinese).
[10]刘孝辉,赵森林,阮思烨,等.受端分层特高压直流阀区保护优化策略[J].电网技术,2017,41(8):2423-2428.Liu Xiaohui,Zhao Senlin,Ruan Siye,et al.Optimal strategies of valve protection of UHVDC with hierarchical connection structure[J].Power System Technology,2017,41(8):2423-2428(in Chinese).
[11]卢东斌,王永平,王振曦,等.分层接入方式的特高压直流输电逆变侧最大触发延迟角控制[J].中国电机工程学报,2016,36(7):1808-1816.Lu Dongbin,Wang Yongping,Wang Zhenxi,et al.Inverter maximum alpha control in UHVDC transmission with hierarchical connection mode[J].Proceedings of the CSEE,2016,36(7):1808-1816(in Chinese).
[12]汤奕,陈斌,皮景创,等.特高压直流分层接入方式下受端交流系统接纳能力分析[J].中国电机工程学报,2016,36(7):1790-1800.Tang Yi,Chen Bin,Pi Jingchuang,et al.Analysis on absorbing ability of receiving AC system for UHVDChierarchical connection to AC grid[J].Proceedings of the CSEE,2016,36(7):1790-1800(in Chinese).
[13]汤奕,陈斌,王琦,等.特高压直流分层接入下混联系统无功电压耦合特性分析[J].电网技术,2016,40(4):1005-1011.Tang Yi,Chen Bin,Wang Qi,et al.Analysis on reactive power and voltage coupling characteristics of hybrid system for UHVDC hierarchical connection to ACgrid[J].Power System Technology,2016,40(4):1005-1011(in Chinese).
[14]付蓉,周振凯,汤奕,等.特高压直流分层接入方式下换流母线电压的稳定性[J].高电压技术,2017,43(12):4103-4111.Fu Rong,Zhou Zhenkai,Tang Yi,et al.Voltage stability of converter buses of UHVDC hierarchical connection to AC grid[J].High Voltage Engineering,2017,43(12):4103-4111(in Chinese).
[15]郭龙,刘崇茹,贠飞龙,等.?1100kV直流系统分层接入方式下的功率协调控制[J].电力系统自动化,2015,39(11):24-30.Guo Long,Liu Chongru,Yun Feilong,et al.Power coordination control?1100k V UHVDC system with hierarchical connection mode[J].Automation of Electric Power Systems,2015,39(11):24-30(in Chinese).
[16]熊永新,沈郁,姚伟,等.?1100kV特高压直流分层接入方式下改进附加功率协调控制策略[J].电网技术,2017,41(11):3448-3456.Xiong Yongxin,Shen Yu,Yao Wei,et al.Improved additional power coordinated control of?1100kVUHVDC system with hierarchical connection grid[J].Power System Technology,2017,41(11):3448-3456(in Chinese).
[17]林伟芳,易俊,汤涌,等.分层直流短路比的定义和应用[J].中国电机工程学报,2017,37(22):6627-6635.Lin Weifang,Yi Jun,Tang Yong,et al.Definition and application of hierarchical infeed DC short circuit ratio[J].Proceedings of the CSEE,2017,37(22):6627-6635(in Chinese).
[18]周长春,徐政.直流输电准稳态模型有效性的仿真验证[J].电网技术,2003,23(12):33-36.Zhou Changchun,Xu Zheng.Simulation validity test of the HVDC quasi-steady-state model[J].Proceedings of the CSEE,2003,23(12):33-36(in Chinese).
[19]万磊,汤涌,吴文传,等.特高压直流控制系统机电暂态等效建模与参数实测方法[J].电网技术,2017,41(3):709-714.Wan Lei,Tang Yong,Wu Wenchuan,et al.Equivalent modeling and real parameter measurement methods of control systems of UHVDC transmission systems[J].Power System Technology,2017,41(3):709-714(in Chinese).
[20]万磊,丁辉,刘文焯.基于实际工程的直流输电控制系统仿真模型[J].电网技术,2013,37(3):629-634.Wan Lei,Ding Hui,Liu Wenzhuo.Simulation model of control system for HVDC power transmission based on actual project[J].Power System Technology,2013,37(3):629-634(in Chinese).
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