A Method Based on Constant Reactive Power Control of Inverter to Suppress the Subsequent Commutation Failure in HVDC System
Wang Juanjuan1, Zheng Ruina1,2, Fu Chuang3, Wu Qiumei1,2
1. School of Electric Power South China University of Technology Guangzhou 510641 China; 2. Guangzhou Power Supply Bureau of Guangdong Power Grid Co. Ltd Guangzhou 510620 China; 3. State Key Laboratory of HVDC China Southern Power Grid Electric Power Research Institute Guangzhou 510663 China
Abstract AC side fault is the main reason for commutation failure of HVDC system. In the process of AC fault occurrence or removal, or even system recovery, the reactive power impact caused by converter station to AC system is likely to cause subsequent commutation failure due to the influence of commutation bus voltage change and DC control. However, due to the long response time, reactive power compensation equipment is usually difficult to respond in time to suppress subsequent commutation failure, so it is often used as an auxiliary means. In recent years, many methods have been proposed to control the reactive power by optimizing the DC control mode, but most of them do not take into account the transmission delay between the rectifier side and the inverter side. In order to solve these problems, this paper proposes a two-terminal coordination control strategy based on dynamic reactive power control of the inverter station, taking the extinction Angle of the inverter station as the control quantity. Firstly, the variation trend of reactive power of inverter with DC current and extinction angle is analyzed. The operating range of extinction angle, DC current and reactive power in quasi-steady state is analyzed. Then, a method based on constant reactive power control of inverter to suppress the subsequent commutation failure is proposed. By setting the new VDCOL(voltage dependent current order limitation) parameters on the rectifier, and calculating the reference value of the extinction angle in real time according to the AC bus voltage and DC current on the inverter, the reactive power of the inverter is controlled during AC fault. On the one hand, the inverter side controls the reactive power of the inverter station by controlling the extinction Angle. When the AC bus voltage or DC current value detected by the inverter side changes, the reactive power switching capacity can be controlled in real time by directly changing the extinction Angle of the inverter side. The extinction Angle, DC voltage and inverter side AC voltage are coupled to each other and meet the constraints of quasi-steady state equation. On the other hand, the operation range of DC current can be calculated according to the quasi-steady-state equation on the rectifier side, and according to the new current instruction given, it can meet the reactive power quantitative demand of the inverter side at the rated extinction Angle. The DC voltage measured by the rectifier side gives the DC current instruction in real time, which is no longer transmitted by the inverter side, so as to avoid the deterioration of the system performance caused by the transmission delay. Finally, the CIGRE HVDC model and GuiGuang Ⅱ HVDC model in PSCAD/EMTDC are taken as examples. After the improvement, subsequent commutation failure occurs when AC fault is more serious, and the system recovers more smoothly. The results verify that the proposed method can effectively improve the system's support capability during AC fault and reduce the probability of subsequent commutation failure. This paper mainly studies the dynamic reactive power control strategy of inverter station under three-phase symmetric fault, and the dynamic reactive power control method for single-phase ground fault needs to be further developed.
Wang Juanjuan,Zheng Ruina,Fu Chuang等. A Method Based on Constant Reactive Power Control of Inverter to Suppress the Subsequent Commutation Failure in HVDC System[J]. Transactions of China Electrotechnical Society, 2023, 38(17): 4672-4682.
[1] 刘振亚, 张启平. 国家电网发展模式研究[J]. 中国电机工程学报, 2013, 33(7): 1-10, 25. Liu Zhenya, Zhang Qiping.Study on the development mode of national power grid of China[J]. Proceedings of the CSEE, 2013, 33(7): 1-10, 25. [2] 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 HVDC participated into stability control[J]. Proceedings of the CSEE, 2014, 34(22): 3750-3759. [3] 金璇, 杨万开, 徐永海. UHVDC分层接入方式谐波对换相失败影响的研究[J]. 电网技术, 2021, 45(9): 3763-3771. Jin Xuan, Yang Wankai, Xu Yonghai.Commutation failure impacted by harmonics in UHVDC split connection grid system[J]. Power System Technology, 2021, 45(9): 3763-3771. [4] 张艳霞, 卢静怡, 张富贺, 等. 基于临界故障时刻的换相失败预测方法[J]. 电网技术, 2021, 45(10): 4066-4075. Zhang Yanxia, Lu Jingyi, Zhang Fuhe, et al.Commutation failure prediction considering critical fault moment[J]. Power System Technology, 2021, 45(10): 4066-4075. [5] 邓瑜佳. 交直流混联系统换相失败下的保护与故障定位方法[D]. 成都: 西南交通大学, 2019. [6] 屠竞哲, 张健, 曾兵, 等. 直流换相失败及恢复过程暂态无功特性及控制参数影响[J]. 高电压技术, 2017, 43(7): 2131-2139. Tu Jingzhe, Zhang Jian, Zeng Bing, et al.HVDC transient reactive power characteristics and impact of control system parameters during commutation failure and recovery[J]. High Voltage Engineering, 2017, 43(7): 2131-2139. [7] Shao Yao, Tang Yong.Fast evaluation of commutation failure risk in multi-infeed HVDC systems[J]. IEEE Transactions on Power Systems, 2018, 33(1): 646-653. [8] 李培平, 姚伟, 高东学, 等. 基于电化学储能的多馈入直流系统暂态控制及影响因素分析[J]. 电工技术学报, 2021, 36(增刊1): 154-167. Li Peiping, Yao Wei, Gao Dongxue, et al.Transient control and influencing factors analysis of multi-infeed HVDC system based on electrochemical energy storage[J]. Transactions of China Electrotechnical Society, 2021, 36(S1): 154-167. [9] 王增平, 刘席洋, 郑博文, 等. 基于电压波形拟合的换相失败快速预测与抑制措施[J]. 电工技术学报, 2020, 35(7): 1454-1463. Wang Zengping, Liu Xiyang, Zheng Bowen, et al.The research on fast prediction and suppression measures of commutation failure based on voltage waveform fitting[J]. Transactions of China Electrotechnical Society, 2020, 35(7): 1454-1463. [10] 许汉平, 杨炜晨, 张东寅, 等. 考虑换相失败相互影响的多馈入高压直流系统换相失败判断方法[J]. 电工技术学报, 2020, 35(8): 1776-1786. Xu Hanping, Yang Weichen, Zhang Dongyin, et al.Commutation failure judgment method for multi-infeed HVDC systems considering the interaction of commutation failures[J]. Transactions of China Electrotechnical Society, 2020, 35(8): 1776-1786. [11] Sadek K, Pereira M, Brandt D P, et al.Capacitor commutated converter circuit configurations for DC transmission[J]. IEEE Transactions on Power Delivery, 1998, 13(4): 1257-1264. [12] 张志文, 雷诗婕, 翟承达, 等. 高压直流输电系统吸收与并联电容换相换流器特性分析[J]. 电工技术学报, 2019, 34(增刊2): 684-691. Zhang Zhiwen, Lei Shijie, Zhai Chengda, et al.The characteristic analysis of HVDC system with absorption and shunt capacitance commutated converter[J]. Transactions of China Electrotechnical Society, 2019, 34(S2): 684-691. [13] Xue Ying, Zhang Xiaoping.Reactive power and AC voltage control of LCC HVDC system with controllable capacitors[J]. IEEE Transactions on Power Systems, 2016, 32(1): 753-764. [14] 李辉, 王震, 周挺, 等. 含同步调相机的直流受端换流站全工况下多模式协调控制策略[J]. 电工技术学报, 2020, 35(17): 3678-3690. Li Hui, Wang Zhen, Zhou Ting, et al.Multi-mode coordinated control strategy for DC receiving converter station with synchronous condenser under full operating conditions[J]. Transactions of China Electrotechnical Society, 2020, 35(17): 3678-3690. [15] 杨欢欢, 朱林, 蔡泽祥, 等. 直流控制对直流系统无功动态特性的影响分析[J]. 电网技术, 2014, 38(10): 2631-2637. Yang Huanhuan, Zhu Lin, Cai Zexiang, et al.Influence of HVDC control on HVDC reactive power dynamic characteristic[J]. Power System Technology, 2014, 38(10): 2631-2637. [16] 王贺楠, 郑超, 任杰, 等. 直流逆变站动态无功轨迹及优化措施[J]. 电网技术, 2015, 39(5): 1254-1260. Wang Henan, Zheng Chao, Ren Jie, et al.Dynamic reactive power trajectory of HVDC inverter station and its optimization measures[J]. Power System Technology, 2015, 39(5): 1254-1260. [17] 郭春义, 李春华, 刘羽超, 等. 一种抑制传统直流输电连续换相失败的虚拟电阻电流限制控制方法[J]. 中国电机工程学报, 2016, 36(18): 4930-4937, 5117. Guo Chunyi, Li Chunhua, Liu Yuchao, et al.A DC current limitation control method based on virtual-resistance to mitigate the continuous commutation failure for conventional HVDC[J]. Proceedings of the CSEE, 2016, 36(18): 4930-4937, 5117. [18] 李瑞鹏, 李永丽, 陈晓龙. 一种抑制直流输电连续换相失败的控制方法[J]. 中国电机工程学报, 2018, 38(17): 5029-5042, 5300. Li Ruipeng, Li Yongli, Chen Xiaolong.A control method for suppressing the continuous commutation failure of HVDC transmission[J]. Proceedings of the CSEE, 2018, 38(17): 5029-5042, 5300. [19] 郑超, 马世英, 盛灿辉, 等. 以直流逆变站为动态无功源的暂态电压稳定控制[J]. 中国电机工程学报, 2014, 34(34): 6141-6149. Zheng Chao, Ma Shiying, Sheng Canhui, et al.Transient voltage stability control based on the HVDC inverter station acting as dynamic reactive source[J]. Proceedings of the CSEE, 2014, 34(34): 6141-6149. [20] 李瑶佳, 汪娟娟, 李子林, 等. 考虑高压直流输电系统无功特性的低压限流参数设置[J]. 电力系统保护与控制, 2017, 45(16): 16-23. Li Yaojia, Wang Juanjuan, Li Zilin, et al.VDCOL parameters setting influenced by reactive power characteristics of HVDC system[J]. Power System Protection and Control, 2017, 45(16): 16-23. [21] 黄梦华, 汪娟娟, 李瑶佳, 等. 高压直流定无功功率交流故障恢复方法[J]. 电力系统自动化, 2018, 42(3): 143-148. Huang Menghua, Wang Juanjuan, Li Yaojia, et al.Constant reactive power control during AC fault recovery for HVDC[J]. Automation of Electric Power Systems, 2018, 42(3): 143-148. [22] 汪娟娟, 黄梦华, 傅闯. 交流故障下高压直流运行特性及恢复策略研究[J]. 中国电机工程学报, 2019, 39(2): 514-523, 648. Wang Juanjuan, Huang Menghua, Fu Chuang.Research on operational characteristics and recovery strategy of HVDC under AC fault[J]. Proceedings of the CSEE, 2019, 39(2): 514-523, 648. [23] Wang Juanjuan, Huang Menghua, Fu Chuang, et al.A new recovery strategy of HVDC system during AC faults[J]. IEEE Transactions on Power Delivery, 2019, 34(2): 486-495. [24] 汪家铭, 徐谦, 戴攀, 等. 基于无功反馈控制的后续换相失败抑制方法[J]. 电力系统自动化, 2021, 45(12): 101-108. Wang Jiaming, Xu Qian, Dai Pan, et al.Suppression method of subsequent commutation failure based on reactive power feedback control[J]. Automation of Electric Power Systems, 2021, 45(12): 101-108. [25] 刘磊, 林圣, 刘健, 等. 控制器交互不当引发后续换相失败的机理分析[J]. 电网技术, 2019, 43(10): 3562-3568. Liu Lei, Lin Sheng, Liu Jian, et al.Mechanism analysis of subsequent commutation failures caused by improper interaction of controllers[J]. Power System Technology, 2019, 43(10): 3562-3568. [26] 郑睿娜, 汪娟娟, 文兆新, 等. 基于交流故障快速检测的高压直流换相失败抑制方法[J]. 电网技术, 2022, 46(3): 851-859. Zheng Ruina, Wang Juanjuan, Wen Zhaoxin, et al.A method based on fast fault detection of inverter-side AC system to suppress the commutation failure in HVDC system[J]. Power System Technology, 2022, 46(3): 851-859.
2023, Vol. 38 
