跟网型MMC-HVDC并网暂态同步稳定机理分析*

doi:10.11985/2023.03.027

电气工程学报 ›› 2023, Vol. 18 ›› Issue (3): 250-259.doi: 10.11985/2023.03.027

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跟网型MMC-HVDC并网暂态同步稳定机理分析^*

项中明¹(), 倪秋龙¹(), 李振华², 徐建平², 薛翼程³, 张哲任³(), 徐政³

1.国网浙江省电力有限公司杭州 310007
2.国网浙江省电力有限公司金华供电公司金华 321017
3.浙江大学电气工程学院杭州 310027

收稿日期:2022-09-20 修回日期:2023-03-20 出版日期:2023-09-25 发布日期:2023-10-23
通讯作者: 张哲任，男，1988年生，博士，特聘副研究员。主要研究方向为直流输电与柔性交流输电。E-mail：3071001296zhang@zju.edu.cn
作者简介:项中明，男，1974年生，硕士，高级工程师。主要研究方向为电网运行与控制。E-mail：m15215310706@163.com
倪秋龙，男，1975年生，硕士，高级工程师。主要研究方向为电网运行与控制。E-mail：15098728375@163.com
基金资助:
* 国网浙江省电力有限公司科技资助项目(5211JH2000RW)

Transient Stability Mechanism Analysis of Grid-following MMC-HVDC

XIANG Zhongming¹(), NI Qiulong¹(), LI Zhenhua², XU Jianping², XUE Yicheng³, ZHANG Zheren³(), XU Zheng³

1. State Grid Zhejiang Electric Power Corporation, Hangzhou 310007
2. Jinhua Power Supply Corporation, State Grid Zhejiang Electric Power Corporation, Jinhua 321017
3. College of Electrical Engineering, Zhejiang University, Hangzhou 310027

Received:2022-09-20 Revised:2023-03-20 Online:2023-09-25 Published:2023-10-23

摘要/Abstract

摘要：

随着电力系统中新能源接入比例不断提高，采用跟网控制的模块化多电平换流器型柔性直流输电(Modular multilevel converter based high voltage direct current，MMC-HVDC)在输电系统中占据越来越重要的地位，其并网暂态同步稳定性会影响电力系统的安全运行。研究跟网型MMC-HVDC系统的暂态同步稳定机理，首先建立了以锁相环为同步单元的换流器的并网动力学模型，随后基于此模型，研究了电网强度、换流器的故障穿越策略以及锁相环参数对其暂态稳定性的影响。当电网强度较高、换流器故障期间注入无功电流分量增大时，换流器的并网暂态稳定性较强，减小锁相环的比例和积分增益有利于暂态稳定性。根据暂态稳定机理，提出了与阻抗角匹配的故障期间注入电流策略，以提升换流器的暂态同步稳定性。在时域仿真软件PSCAD/EMTDC中搭建了电磁暂态仿真模型并验证了本文结论和所提暂态稳定增强策略的有效性。

关键词: 模块化多电平换流器, 暂态稳定性, 锁相环, 故障穿越策略

Abstract:

With the increase of renewable power integration, the modular multilevel converter based high voltage direct current(MMC-HVDC) with grid-following control has gained more importance in the transmission system. The transient stability of MMC-HVDC will affect the secure operation of power system. The transient stability mechanism of grid-following MMC-HVDC is studied. The dynamic model of phase-locked loop(PLL) is developed first. Firstly, the grid-connected dynamic model of MMC with phase-locked loop(PLL) as synchronization unit is established. Then based on the model, the influence of grid strength, fault-ride through control and PLL parameters on the transient stability is studied. The grid-connected transient stability of the MMC enhances when the power grid strength is high and the reactive component of injection current during the fault increases. Reducing the proportion and integral gain of the PLL is beneficial to transient stability. According to the stability mechanism, a control strategy of injection current is proposed for the MMC to improve the transient stability by matching the current angle with the grid impedance angle. The time-domain simulation in PSCAD/EMTDC verified the conclusions and the effectiveness of the proposed enhancement control.

Key words: Modular multilevel converter, transient stability, phase-locked loop, fault ride-through control strategy

中图分类号:

TM712
TM46

项中明, 倪秋龙, 李振华, 徐建平, 薛翼程, 张哲任, 徐政. 跟网型MMC-HVDC并网暂态同步稳定机理分析^*[J]. 电气工程学报, 2023, 18(3): 250-259.

XIANG Zhongming, NI Qiulong, LI Zhenhua, XU Jianping, XUE Yicheng, ZHANG Zheren, XU Zheng. Transient Stability Mechanism Analysis of Grid-following MMC-HVDC[J]. Journal of Electrical Engineering, 2023, 18(3): 250-259.

图/表 16

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参考文献 22

[1]	徐政. 电力系统广义同步稳定性的物理机理与研究途径[J]. 电力自动化设备, 2020, 40(9):3-9.
	XU Zheng. Physical mechanism and research approach of generalized synchronous stability for power systems[J]. Electric Power Automation Equipment, 2020, 40(9):3-9.
[2]	谢小荣, 贺静波, 毛航银, 等. “双高”电力系统稳定性的新问题及分类探讨[J]. 中国电机工程学报, 2021, 41(2):461-475.
	XIE Xiaorong, HE Jingbo, MAO Hangyin, et al. New issues and classification of power system stability with high shares of renewables and power electronics[J]. Proceedings of the CSEE, 2021, 41(2):461-475.
[3]	徐政. 高比例非同步机电源电网面临的三大技术挑战[J]. 南方电网技术, 2020, 14(2):1-9.
	XU Zheng. Three technical challenges faced by power grids with high proportion of non-synchronous machine sources[J]. Southern Power System Technology, 2020, 14(2):1-9.
[4]	张琛, 蔡旭, 李征. 全功率变换风电机组的暂态稳定性分析[J]. 中国电机工程学报, 2017, 37(14):4018-4026.
	ZHANG Chen, CAI Xu, LI Zheng. Transient stability analysis of wind turbines with full-scale voltage source converter[J]. Proceedings of the CSEE, 2017, 37(14):4018-4026.
[5]	朱蜀, 刘开培, 秦亮, 等. 电力电子化电力系统暂态稳定性分析综述[J]. 中国电机工程学报, 2017, 37(14):3948-3962.
	ZHU Shu, LIU Kaipei, QIN Liang, et al. Analysis of transient stability of power electronics dominated power system:An overview[J]. Proceedings of the CSEE, 2017, 37(14):3948-3962.
[6]	徐政. 柔性直流输电系统[M]. 北京: 机械工业出版社, 2016.
	XU Zheng. Voltage source converter based high voltage direct current transmission system[M]. Beijing: China Machine Press, 2016.
[7]	薛翼程, 王国腾, 张哲任, 等. MMC-HVDC接入对同步发电机阻尼转矩的影响机理分析[J]. 电力系统自动化, 2022, 46(9):99-108.
	XUE Yicheng, WANG Guoteng, ZHANG Zheren, et al. Mechanism analysis of influence of MMC-HVDC integration on damping torque of synchronous generators[J]. Automation of Electric Power Systems, 2022, 46(9):99-108.
[8]	NIKOLAS F, VASSILIOS G, GEORGIOS D. VSC-based HVDC power transmission systems:An overview[J]. IEEE Transactions on Power Electronics, 2009, 24(3):592-602. doi: 10.1109/TPEL.2008.2008441
[9]	张宇, 蔡旭, 张琛, 等. 并网变换器的暂态同步稳定性研究综述[J]. 中国电机工程学报, 2021, 41(5):1687-1702.
	ZHANG Yu, CAI Xu, ZHANG Chen, et al. Transient synchronization stability analysis of voltage source converters:A review[J]. Proceedings of the CSEE, 2021, 41(5):1687-1702.
[10]	黄林彬, 辛焕海, 鞠平, 等. 电力电子并网装备的同步稳定分析与统一同步控制结构[J]. 电力自动化设备, 2020, 40(9):10-25.
	HUANG Linbin, XIN Huanhai, JU Ping, et al. Synchronization stability analysis and unified synchronization control structure of grid-connected power electronic devices[J]. Electric Power Automation Equipment, 2020, 40(9):10-25.
[11]	胡家兵, 袁小明, 程时杰. 电力电子并网装备多尺度切换控制与电力电子化电力系统多尺度暂态问题[J]. 中国电机工程学报, 2019, 39(18):5457-5467.
	HU Jiabing, YUAN Xiaoming, CHENG Shijie. Multi-time scale transients in power-electronized power systems considering multi-time scale switching control schemes of power electronics apparatus[J]. Proceedings of the CSEE, 2019, 39(18):5457-5467.
[12]	袁小明, 程时杰, 胡家兵. 电力电子化电力系统多尺度电压功角动态稳定问题[J]. 中国电机工程学报, 2016, 36(19):5145-5154.
	YUAN Xiaoming, CHENG Shijie, HU Jiabing. Multi-time scale voltage and power angle dynamics in power electronics dominated large power systems[J]. Proceedings of the CSEE, 2016, 36(19):5145-5154.
[13]	胡祺, 付立军, 马凡, 等. 弱电网下基于锁相控制并网变换器小扰动同步稳定分析[J]. 中国电机工程学报, 2021, 41(1):98-108.
	HU Qi, FU Lijun, MA Fan, et al. Small signal synchronizing stability analysis of PLL-based VSC connected to weak AC grid[J]. Proceedings of the CSEE, 2021, 41(1):98-108.
[14]	张学广, 付志超, 陈文佳, 等. 弱电网下考虑锁相环影响的并网逆变器改进控制方法[J]. 电力系统自动化, 2018, 42(7):139-145.
	ZHANG Xueguang, FU Zhichao, CHEN Wenjia, et al. An improved control method for grid-connected inverters considering impact of phase-locked loop under weak grid conditions[J]. Automation of Electric Power Systems, 2018, 42(7):139-145.
[15]	HU Q, FU L, MA F, et al. Large signal synchronizing instability of PLL-based VSC connected to weak AC grid[J]. IEEE Transactions on Power Systems, 2019, 34(4):3220-3229. doi: 10.1109/TPWRS.59
[16]	WU H, WANG X. Design-oriented transient stability analysis of PLL-synchronized voltage-source converters[J]. IEEE Transactions on Power Electronics, 2020, 35(4):3573-3589. doi: 10.1109/TPEL.63
[17]	HE X, GENG H, LI R, et al. Transient stability analysis and enhancement of renewable energy conversion system during LVRT[J]. IEEE Transactions on Sustainable Energy, 2020, 11(3):1612-1623. doi: 10.1109/TSTE.5165391
[18]	MA S, GENG H, LIU L, et al. Grid-synchronization stability improvement of large scale wind farm during severe grid fault[J]. IEEE Transactions on Power Systems, 2018, 33(1):216-226. doi: 10.1109/TPWRS.2017.2700050
[19]	刘耀, 吴佳玮, 赵小令, 等. 基于电池储能的MMC-HVDC系统的建模与仿真[J]. 电力工程技术, 2020, 39(4):48-54.
	LIU Yao, WU Jiawei, ZHAO Xiaoling, et al. Modeling and simulation of battery energy storage system based on MMC-HVDC[J]. Electric Power Engineering Technology, 2020, 39(4):48-54.
[20]	薛翼程, 张哲任, 徐政. 含跟网型VSC的交流系统暂态稳定解析模型及协调控制[J/OL]. 电力自动化设备:1-17[2023-04-27]. https://doi.org/10.16081/j.epae.202303019.
	XUE Yicheng, ZHANG Zheren, XU Zheng. An analytical model and coordinated control for transient stability of AC systems with VSC following the grid[J/OL]. Electric Power Automation Equipment:1-17[2023-04-27]. https://doi.org/10.16081/j.epae.202303019.
[21]	徐政. 交直流电力系统动态行为分析[M]. 北京: 机械工业出版社, 2004.
	XU Zheng. Dynamic behavior analysis of AC/DC power systems[M]. Beijing: China Machine Press, 2004.
[22]	王锡凡. 现代电力系统分析[M]. 北京: 科学出版社, 2003.
	WANG Xifan. Modern power system analysis[M]. Beijing: Science Press, 2003.

参数	数值
MMC额定容量/(MV·A)	400
MMC直流电压/kV	400
MMC子模块个数	200
MMC阀侧交流电压/kV	210
系统基准容量/(MV·A)	400
电网额定电压/kV	110
系统频率/Hz	60
短路比	1.6
电网等值阻抗角φ_Z/(°)	80
MMC有功、无功指令值/p.u.	0.8/0
PLL参数K_p、K_i	100/220
MMC电流限幅值I_max/p.u.	1.2
交流电压阈值U_thr/p.u.	0.75

参考值I_dref/A	电流角φ_I/(°)	CCT/ms
0.3	-75	595
0.6	-60	150
0.9	-41	75
0.1	-85	137
-0.1	-95	65
-0.3	-104	49

K_i	CCT/ms	K_p	CCT/ms
100	225	60	275
220	203	100	203
400	181	140	156

短路比ρ_SCR	电压u_sq/p.u.	CCT/ms
1.6	0.094	203
2	0.075	262
2.3	0.067	300

跟网型MMC-HVDC并网暂态同步稳定机理分析^*

Transient Stability Mechanism Analysis of Grid-following MMC-HVDC

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