Interaction Between AC and DC Grid-Connected Sub-Synchronous and Super-Synchronous Oscillations in Wind Farms

doi:10.12204/j.issn.1000-7229.2022.01.006

Abstract

Abstract:

Applying the state space modeling method, the small disturbance models of different wind farms connected to the power grid through paralleled AC and DC lines are established, and the generation mechanism of various oscillation modes in the system is analyzed in detail. Furthermore, the differences of the effects of system structure parameters and key controller parameters on the natural oscillation mode and coupled oscillation mode of the system are analyzed. On this basis, the interaction mechanism and factors between AC and DC system are revealed. The correctness of the system is verified by time-domain simulation on PSCAD / EMTDC platform. The results show that the influence of system parameters on the coupled oscillation modes between AC and DC systems is complex.

Key words: eigenvalue analysis method, AC/DC hybrid connection, sub-synchronous and super-synchronous oscillation, interactive influence

CLC Number:

TM712

YANG Xiu, HU Haoran, LI Zengyao, LI Lihua, WU Qiong, XU Licheng. Interaction Between AC and DC Grid-Connected Sub-Synchronous and Super-Synchronous Oscillations in Wind Farms[J]. ELECTRIC POWER CONSTRUCTION, 2022, 43(1): 49-62.

Figures/Tables 28

Fig.1 Topology diagram of wind power grid-connected system through AC and DC lines

Fig.2 Block diagram of the rotor-side controller

Fig.3 Block diagram of grid-side converter

Fig.4 PLL model

Fig.5 Diagram of transformation relationship in different coordinate systems

Table 1 Eigenvalue calculation result

Table 2 The order of participation factors corresponding to each oscillation mode

Table 3 Mode classification

Fig.6 Waveform of active power oscillation

Fig.7 Spectrogram from PRONY analysis

Fig.8 Effect of grid-connected capacity of wind power on inherent oscillation patterns

Fig.9 Effect of SCR on the intrinsic oscillation mode

Fig.10 Damping frequency characteristics when the short-circuit ratio of the receiving-end power grid changes

Fig.11 Damping frequency characteristics when the capacity of grid-connected wind power changes

Fig.12 Frequency resistance characteristics of DFIG controller parameters K1 and K2

Table 4 Effect of DC system controller parameters on inherent oscillation modes

Table 5 Influence of system structure parameters on coupled oscillation modes

Fig.13 PMSG grid-connected via flexible DC line

Table 6 Inherent modes of the DC system before and after the AC system connected

Fig.14 DFIG grid-connected via AC lines

Table 7 Inherent mode of the AC system before and after the DC system connected

Table A1 Parameters of converter controller of PMSG

Table A2 Parameters of converter controller of DFIG

Table A3 Table A3 Controller parameters of the converters of VSC-HVDC

Fig.A1 Frequency resistance characteristics of SSO-5 and SupSO when cp1 and ci1 change

Fig.A2 Frequency resistance characteristics of SSO-5 and SupSO when cp2 and ci2 change

Fig.A3 Frequency resistance characteristics of SSO-5 and SupSO when cp3 and ci3 change

Fig.A4 Frequency resistance characteristics of SSO-5 and SupSO when cp4 and ci4 change

References 25

[1]	王锡凡, 卫晓辉, 宁联辉, 等. 海上风电并网与输送方案比较[J]. 中国电机工程学报, 2014, 34(31): 5459-5466.
	WANG Xifan, WEI Xiaohui, NING Lianhui, et al. Integration techniques and transmission schemes for off-shore wind farms[J]. Proceedings of the CSEE, 2014, 34(31): 5459-5466.
[2]	邢华栋, 张叔禹, 尹柏清, 等. 风电并网系统次同步振荡稳定性分析与控制方法研究综述[J]. 电测与仪表, 2020, 57(24): 13-21.
	XING Huadong, ZHANG Shuyu, YIN Baiqing, et al. Review of sub-synchronous oscillation stability analysis and control method for grid-connected wind power system[J]. Electrical Measurement & Instrumentation, 2020, 57(24): 13-21.
[3]	马宁宁, 谢小荣, 贺静波, 等. 高比例新能源和电力电子设备电力系统的宽频振荡研究综述[J]. 中国电机工程学报, 2020, 40(15): 4720-4732.
	MA Ningning, XIE Xiaorong, HE Jingbo, et al. Review of wide-band oscillation in renewable and power electronics highly integrated power systems[J]. Proceedings of the CSEE, 2020, 40(15): 4720-4732.
[4]	姜齐荣, 王玉芝. 电力电子设备高占比电力系统电磁振荡分析与抑制综述[J]. 中国电机工程学报, 2020, 40(22): 7185-7201.
	JIANG Qirong, WANG Yuzhi. Overview of the analysis and mitigation methods of electromagnetic oscillations in power systems with high proportion of power electronic equipment[J]. Proceedings of the CSEE, 2020, 40(22): 7185-7201.
[5]	魏伟, 许树楷, 李岩, 等. 南澳多端柔性直流输电示范工程系统调试[J]. 南方电网技术, 2015, 9(1): 73-77.
	WEI Wei, XU Shukai, LI Yan, et al. The system commissioning of Nan’ao VSC-MTDC demonstration project[J]. Southern Power System Technology, 2015, 9(1): 73-77.
[6]	赵岩, 郑斌毅, 贺之渊. 南汇柔性直流输电示范工程的控制方式和运行性能[J]. 南方电网技术, 2012, 6(6): 6-10.
	ZHAO Yan, ZHENG Binyi, HE Zhiyuan. The control mode and operating performance of Nanhui VSC-HVDC demonstration project[J]. Southern Power System Technology, 2012, 6(6): 6-10.
[7]	张健南, 林涛, 余光正, 等. 大规模电力系统阻尼控制器协调优化方法[J]. 电网技术, 2014, 38(9): 2466-2472.
	ZHANG Jiannan, LIN Tao, YU Guangzheng, et al. Coordinated optimization of damping controllers in large-scale power system[J]. Power System Technology, 2014, 38(9): 2466-2472.
[8]	杨博闻, 占颖, 谢小荣, 等. 双馈风电场接入串补输电系统引发次同步谐振的研究模型[J]. 电力系统保护与控制, 2020, 48(8): 120-126.
	YANG Bowen, ZHAN Ying, XIE Xiaorong, et al. A study model for subsynchronous resonance in DFIG based wind farms connected to a series-compensated power system[J]. Power System Protection and Control, 2020, 48(8): 120-126.
[9]	高本锋, 刘毅, 宋瑞华, 等. 双馈风电场经LCC-HVDC送出的次同步振荡特性研究[J]. 中国电机工程学报, 2020, 40(11): 3477-3489.
	GAO Benfeng, LIU Yi, SONG Ruihua, et al. Study on subsynchronous oscillation characteristics of DFIG-based wind farm integrated with LCC-HVDC system[J]. Proceedings of the CSEE, 2020, 40(11): 3477-3489.
[10]	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分析[J]. 中国电机工程学报, 2018, 38(22): 6520-6533.
	SUN Kun, YAO Wei, WEN Jinyu. Mechanism and characteristics analysis of subsynchronous oscillation caused by DFIG-based wind farm integrated into grid through VSC-HVDC system[J]. Proceedings of the CSEE, 2018, 38(22): 6520-6533.
[11]	边晓燕, 丁炀, 买坤, 等. 海上风电场经VSC-HVDC并网的次同步振荡与抑制[J]. 电力系统自动化, 2018, 42(17): 25-33.
	BIAN Xiaoyan, DING Yang, MAI Kun, et al. Subsynchronous oscillation caused by grid-connection of offshore wind farm through VSC-HVDC and its mitigation[J]. Automation of Electric Power Systems, 2018, 42(17): 25-33.
[12]	王利超, 于永军, 张明远, 等. 直驱风电机组阻抗建模及次同步振荡影响因素分析[J]. 电力工程技术, 2020, 39(1): 170-177.
	WANG Lichao, YU Yongjun, ZHANG Mingyuan, et al. Impedance model and analysis of subsynchronous oscillation influence factors for grid-connected full-converter wind turbines[J]. Electric Power Engineering Technology, 2020, 39(1): 170-177.
[13]	LYU J, CAI X. Impact of controller parameters on stability of MMC-based HVDC systems for offshore wind farms[C]// International Conference on Renewable Power Generation (RPG 2015). Beijing: IET, 2015: 1-6.
[14]	LYU J, CAI X, MOLINAS M. Frequency domain stability analysis of MMC-based HVdc for wind farm integration[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2016, 4(1): 141-151. doi: 10.1109/JESTPE.2015.2498182 URL
[15]	AMIN M, MOLINAS M, LYU J. Oscillatory phenomena between wind farms and HVDC systems: The impact of control[C]// 2015 IEEE 16th Workshop on Control and Modeling for Power Electronics (COMPEL). Vancouver, BC, Canada: IEEE, 2015: 1-8.
[16]	LYU J, CAI X, AMIN M, et al. Sub-synchronous oscillation mechanism and its suppression in MMC-based HVDC connected wind farms[J]. IET Generation, Transmission & Distribution, 2018, 12(4): 1021-1029. doi: 10.1049/iet-gtd.2017.1066 URL
[17]	AMIN M, MOLINAS M. Understanding the origin of oscillatory phenomena observed between wind farms and HVDC systems[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, IEEE, 2017, 5(1): 378-392.
[18]	LYU J, MOLINAS M, CAI X. Stabilization control methods for enhancing the stability of wind farm integration via an MMC-based HVDC system[C]// 2017 11th IEEE International Conference on Compatibility, Power Electronics and Power Engineering (CPE-POWERENG). IEEE: 2017: 324-329.
[19]	赵书强, 李忍, 高本锋, 等. 双馈风电机组经串补并网的振荡模式分析[J]. 高电压技术, 2016, 42(10): 3263-3273.
	ZHAO Shuqiang, LI Ren, GAO Benfeng, et al. Modal analysis of doubly-fed induction generator integrated to compensated grid[J]. High Voltage Engineering, 2016, 42(10): 3263-3273.
[20]	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(S1): 21-29.
	XIE Da, FENG Junqi, LOU Yucheng, et al. Small-signal modelling and modal analysis of DFIG-based wind turbine based on three-mass shaft model[J]. Proceedings of the CSEE, 2013, 33(S1): 21-29.
[21]	魏巍, 刘莹, 丁理杰, 等. 改进的双馈风力发电系统小干扰模型[J]. 电网技术, 2013, 37(10): 2904-2911.
	WEI Wei, LIU Ying, DING Lijie, et al. An improved small perturbation model for doubly fed wind power system[J]. Power System Technology, 2013, 37(10): 2904-2911.
[22]	高澈, 牛东晓, 罗超, 等. 双馈风电场单机与多机等值模型对次同步振荡特性影响的对比[J]. 电力自动化设备, 2018, 38(8): 152-157.
	GAO Che, NIU Dongxiao, LUO Chao, et al. Comparison of impact on sub-synchronous oscillation characteristics between single-and multi-generator equivalent model in DFIG wind farm[J]. Electric Power Automation Equipment, 2018, 38(8): 152-157.
[23]	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 subsynchronous oscillation caused by the interaction between full-converter wind turbines and AC systems[J]. Proceedings of the CSEE, 2016, 36(9): 2366-2372.
[24]	陈宝平, 林涛, 陈汝斯, 等. 直驱风电场经VSC-HVDC并网系统的多频段振荡特性分析[J]. 电工技术学报, 2018, 33(S1): 176-184.
	CHEN Baoping, LIN Tao, CHEN Rusi, et al. Characteristics of multi-band oscillation for direct drive wind farm interfaced with VSC-HVDC system[J]. Transactions of China Electrotechnical Society, 2018, 33(S1): 176-184.
[25]	陈宝平, 林涛, 陈汝斯, 等. 采用VSC-HVDC并网的直驱风电场次/超同步振荡特性[J]. 电力系统自动化, 2018, 42(22): 44-51.
	CHEN Baoping, LIN Tao, CHEN Rusi, et al. Analysis on characteristics of sub/super-synchronous oscillation caused by grid-connected direct-drive wind farm via VSC-HVDC system[J]. Automation of Electric Power Systems, 2018, 42(22): 44-51.