Modelling and Stability Analysis of MMC Based Wind Farm Integration System

2023 IEEE International Conference on Power Science and Technology (ICPST) Pub Date : 2023-05-05 DOI:10.1109/ICPST56889.2023.10164912

R. Zeng, Guangheng Pang, Limin Yang, M. Lei, Yizhen Wang

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Abstract

Modular multilevel converter (MMC) based high voltage direct current (HVDC) technology is widely applied for long-distance large-capacity wind power transmission. Due to the interaction of power electronic converters, the sending end system is prone to instability issues such as wide-band oscillation. This paper investigates the main factors affecting the stability of the sending end system. Firstly, the small-disturbance linearized model of the sending end system is established, in which the internal second-order harmonic dynamics of MMC and the dynamics of wind generator grid-side phase locked loop (PLL) is considered. Then, the effects of wind farm active power, AC voltage control parameters of MMC and PLL control parameters on the stability of the sending end system are analyzed by root locus. Finally, a full-scale electromagnetic transient simulation model of MMC based wind farm integration system is established in PSCAD/EMTDC. The effectiveness of the modelling method and the theoretical analysis is verified by the simulation results.

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基于MMC的风电场集成系统建模与稳定性分析

基于模块化多电平变换器(MMC)的高压直流(HVDC)技术在长距离大容量风电传输中得到了广泛应用。由于电力电子变换器之间的相互作用，发送端系统容易出现宽带振荡等不稳定问题。本文研究了影响发送端系统稳定性的主要因素。首先，建立了发送端系统的小扰动线性化模型，该模型考虑了MMC的内部二阶谐波动力学和风力发电机的网侧锁相环动力学;然后，利用根轨迹分析了风电场有功功率、MMC交流电压控制参数和PLL控制参数对发送端系统稳定性的影响。最后，在PSCAD/EMTDC中建立了基于MMC的风电场集成系统全尺寸电磁暂态仿真模型。仿真结果验证了建模方法和理论分析的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2023 IEEE International Conference on Power Science and Technology (ICPST)

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