SVG Based Supplementary Damping Mitigation Strategy for Sub-Synchronous Oscillation in Grid-connected Photovoltaic Plants

doi:10.11930/j.issn.1004-9649.202010078

Abstract

Abstract: To mitigate the sub synchronous oscillation (SSO) in large-scale photovoltaic (PV) plants integrated to weak AC networks, a static var generator (SVG) based supplementary damping control strategy is proposed. The strategy extracts the voltage at the PV coupling point as input signal, and produces the sub-synchronous current that is in the same phase with the sub-synchronous voltage at the coupling point through supplementary sub-synchronous damping controller (SSDC). Thus, the SVG is equivalent to the positive resistance of the accessing the system in parallel at the sub-synchronous frequency, and dissipates the SSO energy for suppression. In addition, the structure and parameter design method of SSDC are analyzed in detail. Finally, taking a PV plant in northwest China as an example, the mitigation effectiveness of the proposed control strategy is verified under various working conditions through electromagnetic transient simulation, which shows that the proposed control strategy can improve the stability margin of the photovoltaic system.

Key words: static var generator, photovoltaic plant, weak AC networks, sub-synchronous oscillation, supplementary damping control

ZHANG Fan, GAO Benfeng, LI Tiecheng. SVG Based Supplementary Damping Mitigation Strategy for Sub-Synchronous Oscillation in Grid-connected Photovoltaic Plants[J]. Electric Power, 2021, 54(12): 11-19,44.

Add to citation manager EndNote|Ris|BibTeX

URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.202010078

https://www.electricpower.com.cn/EN/Y2021/V54/I12/11

References

[1] 白建华, 辛颂旭, 刘俊, 等. 中国实现高比例可再生能源发展路径研究[J]. 中国电机工程学报, 2015, 35(14): 3699–3705
BAI Jianhua, XIN Songxu, LIU Jun, et al. Roadmap of realizing the high penetration renewable energy in China[J]. Proceedings of the CSEE, 2015, 35(14): 3699–3705
[2] 方保民, 李红志, 孔祥鹏, 等. 含高比例光伏出力的长期分布式储能配置研究[J]. 电力系统保护与控制, 2021, 49(2): 121–129
FANG Baomin, LI Hongzhi, KONG Xiangpeng, et al. Research on long-term distributed energy storage configuration with a high proportion of photovoltaic output[J]. Power System Protection and Control, 2021, 49(2): 121–129
[3] 张金平, 汪宁渤, 黄蓉, 等. 高渗透率光伏参与电力系统调频研究综述[J]. 电力系统保护与控制, 2019, 47(15): 179–186
ZHANG Jinping, WANG Ningbo, HUANG Rong, et al. Survey on frequency regulation technology of power grid by high-penetration photovoltaic[J]. Smart Power Protection and Control, 2019, 47(15): 179–186
[4] 邹鹏辉, 张治, 张显立. 高渗透率分布式光伏系统谐波与电压控制[J]. 智慧电力, 2020, 48(12): 40–45
ZOU Penghui, ZHANG Zhi, ZHANG Xianli. Harmonic and voltage control of distributed photovoltaic system with high permeability[J]. Smart Power, 2020, 48(12): 40–45
[5] 葛景, 都洪基, 赵大伟, 等. 光伏电站接入对多机电力系统低频振荡的影响分析[J]. 电力系统自动化, 2016, 40(22): 63–70
GE Jing, DU Hongji, ZHAO Dawei, et al. Influences of grid-connected photovoltaic power plants on low frequency oscillation of multi-machine power systems[J]. Automation of Electric Power Systems, 2016, 40(22): 63–70
[6] 杨尉薇, 朱玲, 李威, 等. 风火打捆直流送出系统次同步振荡及传播特性研究[J]. 电力系统保护与控制, 2019, 47(20): 58–64
YANG Weiwei, ZHU Ling, LI Wei, et al. Study on subsynchronous oscillation and propagation characteristics of wind-fire bundled sending system[J]. Power System Protection and Control, 2019, 47(20): 58–64
[7] 锁军, 袁丽丽, 彭书涛, 等. 基于阻抗测量的风电场谐振特性分析[J]. 电力系统保护与控制, 2019, 47(24): 161–168
SUO Jun, YUAN Lili, PENG Shutao, et al. Analysis of resonant characteristics of wind farm based on impedance measurement[J]. Power System Protection and Control, 2019, 47(24): 161–168
[8] 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): 1035–1042
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
[9] 周林, 张密. 大型光伏电站谐振现象分析[J]. 电力自动化设备, 2014, 34(6): 8–14
ZHOU Lin, ZHANG Mi. Analysis of resonance phenomenon in large-scale photovoltaic power plant[J]. Electric Power Automation Equipment, 2014, 34(6): 8–14
[10] LI C. Unstable operation of photovoltaic inverter from field experiences[J]. IEEE Transactions on Power Delivery, 2018, 33(2): 1013–1015.
[11] 高本锋, 姚磊, 李忍, 等. 大规模光伏电站并网的振荡模式分析[J]. 电力自动化设备, 2017, 37(8): 123–130
GAO Benfeng, YAO Lei, LI Ren, et al. Analysis on oscillation modes of large-scale grid-connected PV power plant[J]. Electric Power Automation Equipment, 2017, 37(8): 123–130
[12] 高本锋, 姚磊, 李忍. 弱电网下锁相环对大型光伏电站振荡模式的影响[J]. 太阳能学报, 2017, 38(12): 3302–3310
GAO Benfeng, YAO Lei, LI Ren. Influence of phase-locked loop on oscillation modes of large-scale pv power plant in weak grid[J]. Acta Energiae Solaris Sinica, 2017, 38(12): 3302–3310
[13] YANG L, YU Z, XU T, et al. Eigenvalue analysis of subsynchronous oscillation in grid-connected PV power stations[C]//2017 China International Electrical and Energy Conference (CIEEC). Beijing, China. IEEE, 2017: 285–290.
[14] 黄汉奇, 毛承雄, 陆继明, 等. 光伏发电系统的小信号建模与分析[J]. 中国电机工程学报, 2012, 32(22): 7–14,24
HUANG Hanqi, MAO Chengxiong, LU Jiming, et al. Small-signal modeling and analysis of grid-connected photovoltaic generation systems[J]. Proceedings of the CSEE, 2012, 32(22): 7–14,24
[15] 熊连松, 刘小康, 卓放, 等. 光伏发电系统的小信号建模及其控制器参数的全局优化设计方法[J]. 电网技术, 2014, 38(5): 1234–1241
XIONG Liansong, LIU Xiaokang, ZHUO Fang, et al. Small-signal modeling of photovoltaic power generation system and global optimal design for its controller parameters[J]. Power System Technology, 2014, 38(5): 1234–1241
[16] TANG H Y, LU G F, YU X, et al. Investigating SSO risks of large-scale photovoltaic generation with the series compensated transmission lines[J]. The Journal of Engineering, 2017, 2017(13): 2048–2052.
[17] ZHAO S Q, LI R, GAO B F, et al. Subsynchronous oscillation of PV plants integrated to weak AC networks[J]. IET Renewable Power Generation, 2019, 13(3): 409–417.
[18] 陈钦磊, 郭春林, 于鹏, 等. 光伏、火电打捆经串补送出系统的次同步振荡研究[J]. 现代电力, 2016, 33(5): 59–67
CHEN Qinlei, GUO Chunlin, YU Peng, et al. Research on subsynchronous oscillations in power system with photovoltaic-thermal-bundled power transimitted by series compensation[J]. Modern Electric Power, 2016, 33(5): 59–67
[19] 高本锋, 姚磊. 模糊自抗扰附加阻尼控制抑制光火打捆经串补送出的次同步振荡[J]. 电力自动化设备, 2018, 38(7): 121–127
GAO Benfeng, YAO Lei. Supplementary damping control of SSO based on fuzzy active disturbance rejection control for photovoltaic-thermal-bundled system transmitted by series compensation[J]. Electric Power Automation Equipment, 2018, 38(7): 121–127
[20] 高本锋, 姚磊. 基于改进自抗扰控制的抑制光火打捆经直流送出系统的次同步振荡策略[J]. 电网技术, 2018, 42(2): 533–540
GAO Benfeng, YAO Lei. Sub-synchronous oscillation suppression for photovoltaic-thermal-bundled power system based on improved active disturbance rejection control[J]. Power System Technology, 2018, 42(2): 533–540
[21] 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): 41–46
LI Kuan, LI Xingyuan, CHEN Shi, et al. Analysis on feasibility of damping HVDC-induced subsynchronous oscillation by photovoltaic grid-connection[J]. Electric Power Automation Equipment, 2015, 35(3): 41–46
[22] VARMA R K, SALEHI R. SSR mitigation with a new control of PV solar farm as STATCOM (PV-STATCOM)[J]. IEEE Transactions on Sustainable Energy, 2017, 8(4): 1473–1483.
[23] 贾祺, 严干贵, 李泳霖, 等. 多光伏发电单元并联接入弱交流系统的稳定性分析[J]. 电力系统自动化, 2018, 42(3): 14–20
JIA Qi, YAN Gangui, LI Yonglin, et al. Stability analysis of multiple parallelled photovoltaic power generation units connected to weak AC system[J]. Automation of Electric Power Systems, 2018, 42(3): 14–20
[24] 严干贵, 段双明, 叶德武, 等. 基于输出阻抗的三相LCL型光伏逆变器稳定性分析[J]. 太阳能学报, 2018, 39(2): 558–566
YAN Gangui, DUAN Shuangming, YE Dewu, et al. Stability analysis of three-phase LCL-type photovoltaic inverter based on the output impedance[J]. Acta Energiae Solaris Sinica, 2018, 39(2): 558–566
[25] JIA Q, YAN G G, CAI Y R, et al. Small-signal stability analysis of photovoltaic generation connected to weak AC grid[J]. Journal of Modern Power Systems and Clean Energy, 2019, 7(2): 254–267.
[26] 汪洋. 大型光伏并网系统的复杂振荡问题研究[D]. 北京: 华北电力大学(北京), 2018.
WANG Yang. Research on complex oscillation problems of large photovoltaic grid-connected systems[D]. Beijing: North China Electric Power University, 2018.
[27] 严干贵, 李龙, 黄亚峰, 等. 弱电网下联网光伏逆变系统稳定性分析及控制参数整定[J]. 太阳能学报, 2013, 34(11): 1853–1859
YAN Gangui, LI Long, HUANG Yafeng, et al. Stability analysis and control parameters tuning of grid-connected photovoltaic inverter system in weak grid[J]. Acta Energiae Solaris Sinica, 2013, 34(11): 1853–1859
[28] 解宝, 周林, 郝高锋, 等. 考虑电网阻抗影响的光伏并网逆变器稳定性与谐振分析及设计[J]. 中国电机工程学报, 2018, 38(22): 6662–6671
XIE Bao, ZHOU Lin, HAO Gaofeng, et al. Stability and resonance analysis and design of photovoltaic grid-connected inverters with effect of grid impedance[J]. Proceedings of the CSEE, 2018, 38(22): 6662–6671
[29] 陈强伟. 静止无功发生器的建模与研究[D]. 西安: 西安科技大学, 2018.
CHEN Qiangwei. Modeling and research of static var generator[D]. Xi'an: Xi'an University of Science and Technology, 2018.
[30] 王玉芝, 王亮, 姜齐荣. 基于STATCOM的风电场SSCI附加阻尼抑制策略[J]. 电力系统自动化, 2019, 43(15): 49–55
WANG Yuzhi, WANG Liang, JIANG Qirong. STATCOM based supplementary damping mitigation strategy for subsynchronous control interaction in wind farms[J]. Automation of Electric Power Systems, 2019, 43(15): 49–55
[31] 曹建春, 项祖涛, 燕翚, 等. 抑制双馈风电场次同步谐振的STATCOM研究[J]. 电网技术, 2019, 43(3): 895–902
CAO Jianchun, XIANG Zutao, YAN Hui, et al. Research on mitigating DFIG wind farm SSR with STATCOM[J]. Power System Technology, 2019, 43(3): 895–902
[32] PRABHU N, JANAKI M, THIRUMALAIVASAN R. Damping of subsynchronous resonance by subsynchronous current injector with STATCOM[C]//TENCON 2009 - 2009 IEEE Region 10 Conference. Singapore. IEEE, 2009: 1–6.
[33] 朱晓娟, 胡海涛, 陶海东, 等. 光伏并网系统的谐波不稳定产生机理及影响规律[J]. 电工技术学报, 2017, 32(10): 33–41
ZHU Xiaojuan, HU Haitao, TAO Haidong, et al. The mechanism and influence of harmonic instability for photovoltaic grid-connected system[J]. Transactions of China Electrotechnical Society, 2017, 32(10): 33–41
[34] 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): 89–93
ZHAO Rui, LI Xingyuan, LIU Tianqi, et al. Design of multi-channel DC supplementary damping controller for subsynchronous and low-frequency oscillation suppression[J]. Electric Power Automation Equipment, 2014, 34(3): 89–93
[35] 李志鹏, 谢小荣. 应用静止同步补偿器抑制次同步谐振的模态互补电流控制方法[J]. 中国电机工程学报, 2010, 30(34): 22–27
LI Zhipeng, XIE Xiaorong. STATCOM-SSR damping control method based on dynamic compensation of currents at complementary frequencies to torsional modes[J]. Proceedings of the CSEE, 2010, 30(34): 22–27
[36] 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): 1593–1604,1895
WANG Xubin, DU Wenjuan, WANG Haifeng. Stability analysis of grid-tied VSC systems under weak connection conditions[J]. Proceedings of the CSEE, 2018, 38(6): 1593–1604,1895