模块化多电平换流器谐波阻抗建模与振荡分析

doi:10.16182/j.issn1004731x.joss.24-FZ0803E

系统仿真学报 ›› 2024, Vol. 36 ›› Issue (12): 2755-2770.doi: 10.16182/j.issn1004731x.joss.24-FZ0803E

• 论文 • 上一篇

模块化多电平换流器谐波阻抗建模与振荡分析

王渝红¹, 陈文晟¹, 高仕林¹, 廖建权¹, 程杨帆²

^1.四川大学电气工程学院，四川成都 610065
^2.国家电网嘉兴供电公司，浙江嘉兴 314000

收稿日期:2024-07-22 修回日期:2024-09-27 出版日期:2024-12-20 发布日期:2024-12-20
通讯作者: 高仕林

Harmonic Impedance Modeling and Oscillation Analysis of Modular Multilevel Converter

Wang Yuhong¹, Chen Wensheng¹, Gao Shilin¹, Liao Jianquan¹, Cheng Yangfan²

^1.College of Electrical Engineering, Sichuan University, Chengdu 610065, China
^2.State Grid Jiaxing Electric Power Supply Company, Jiaxing 314000, China

Received:2024-07-22 Revised:2024-09-27 Online:2024-12-20 Published:2024-12-20
Contact: Gao Shilin
About author:Wang Yuhong(1971-), female, professor, PhD, research area: power system stability and control.
Supported by:
National Natural Science Foundation of China(52307127);State Key Laboratory of Power System Operation and Control(SKLD23KZ07)

摘要/Abstract

摘要：

为快速分析基于模块化多电平换流器的高压直流输电系统(MMC-HVDC)的振荡稳定机理，简化MMC阻抗特性获取过程中的仿真流程，利用谐波状态空间方法建立了考虑不同控制方式的MMC闭环阻抗数学简化仿真模型，包含交流侧阻抗模型和直流侧阻抗模型；根据基于奈奎斯特判据的阻抗分析法研究了MMC交、直流侧的稳定机理；提出了一种基于数据驱动的振荡稳定性分析方法，即基于快速模型的结果利用全局灵敏度算法分析影响MMC振荡稳定的关键参数，并根据灵敏度分析结果，提出振荡抑制的参数调整策略。在MATLAB/Simulink中建立的MMC模型验证了方法的有效性。

关键词: 模块化多电平换流器, 阻抗建模, 谐波状态空间, 全局灵敏度, 阻抗分析法

Abstract:

To facilitate rapid analysis of the oscillation stability mechanism in modular multilevel converter-based high voltage direct current (MMC-HVDC) systems and streamline the simulation process for determining MMC impedance characteristics, a simplified mathematical simulation model for MMC closed-loop impedance is developed using the harmonic state space method. This model considers various control strategies and includes both AC-side and DC-side impedance models. By applying a Nyquist criterion-based impedance analysis method, the stability mechanisms on the AC and DC sides of the MMC are examined. In addition, a data-driven oscillation stability analysis method is also proposed, leveraging a global sensitivity algorithm based on fast model results to identify key parameters influencing MMC oscillation stability. Based on sensitivity analysis results, a parameter adjustment strategy for oscillation suppression is proposed. The simulation results from the MATLAB/Simulink-based MMC model validate the effectiveness of the proposed method.

Key words: modular multilevel converter, impedance modeling, harmonic state space, global sensitivity, impedance analysis

中图分类号:

TP391

王渝红,陈文晟,高仕林等 . 模块化多电平换流器谐波阻抗建模与振荡分析[J]. 系统仿真学报, 2024, 36(12): 2755-2770.

Wang Yuhong,Chen Wensheng,Gao Shilin,et al . Harmonic Impedance Modeling and Oscillation Analysis of Modular Multilevel Converter[J]. Journal of System Simulation, 2024, 36(12): 2755-2770.

图/表 26

参考文献 20

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Parameter	Symbol	Value
Number of bridge arm submodules	N	216
Rated voltage of submodule capacitance/kV	u_CN	1.6
Capacitance value of submodule/mF	C	10
Arm inductance/ mH	L₀	60
Arm resistance/Ω	R₀	1
DC side voltage/kV	U_dc	±320
Effective value of AC measured voltage/kV	u_s	220
Equivalent inductance of AC grid/mH	L_n	220
Equivalent resistance of AC grid/Ω	R_n	14

Parameter	Value
PLL parameters	k_{pll_p}=0.008, k_{pll_i}=1
inner-loop control parameters	k_{i_p}= 45, k_{i_i}= 1 000
DC voltage control parameters	k_{u_p}= 0.1, k_{u_i}=1
power control parameters	K_{p_PQ}= 8×10^-6, K_{i_PQ}= 8×10^-4;
circulating current suppressor parameters/(rad/s)	K_picm= 50, K_ricm= 500
circulating current suppressor parameters/(rad/s)	ω_r= 200 π, ω_c= 10
system delay/μs	T_ds= 400

Parameter	DC cable 1	DC cable 2
Length/km	10.7	10.7
Resistance/(Ω/km)	0.01	0.01
Inductance/(mh/km)	0.198	0.107
Capacitance/(μF/km)	0.187	0.239

Parameter	Symbol	Value
Voltage outer loop PI parameters	k_{u_p}	0.05~0.3
Voltage outer loop PI parameters	k_{u_i}	0.5~2.5
PI parameters of current inner loop	k_{i_p}	30~60
PI parameters of current inner loop	k_{i_i}	700~1 300
PI parameters of PLL	k_{pll_p}	0.004~0.016
PI parameters of PLL	k_{pll_i}	0.5~1.5
Circulation control PR parameter	K_picm	30~70
Circulation control PR parameter	K_ricm	350~650
System delay	T_ds/μs	0~500

模块化多电平换流器谐波阻抗建模与振荡分析

Harmonic Impedance Modeling and Oscillation Analysis of Modular Multilevel Converter

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