Control, Modeling and Stability Analysis of DRU-based Grid-forming Converter*

Q1 Engineering

Chinese Journal of Electrical Engineering Pub Date : 2025-03-01 DOI:10.23919/CJEE.2025.000100

Wencong Wu;Minzhi Wang;Liang Tu;Haiqing Cai;Guanglei Yan;Xiaohui Qu;Haohan Gu;Wei Chen

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引用次数: 0

Abstract

Diode rectifier unit (DRU)-based high-voltage direct current (HVDC) transmission systems are effective in achieving the stable and economical operation of offshore wind-power generation. Considering the uncontrollable characteristics of DRUs, a grid-forming (GFM) strategy for wind-turbine converters is necessary to support offshore AC voltage and frequency. However, the active power-synchronization control in traditional GFM converters is unsuitable for DRU-based GFM converters. Thus, the stability issue for DRU-based HVDC systems involving DRU-based GFM and grid-following (GFL) converters has not yet been addressed. To solve these issues, this study begins with the characteristics of a DRU-based HVDC system and presents a control scheme for DRU-based GFM converters for power synchronization. Subsequently, the dq-frame impedance model of the DRU-based GFM converter is proposed for the stability analysis of the entire HVDC system. Finally, a simulation platform is built to verify the model accuracy and system stability.

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基于药物的网格成形转炉控制、建模及稳定性分析*

基于二极管整流单元（DRU）的高压直流输电系统是实现海上风电稳定经济运行的有效手段。考虑到风力发电机组的不可控特性，风力发电机组变流器必须采用并网策略来支持海上交流电压和频率。然而，传统GFM变换器的有源功率同步控制并不适用于基于药物的GFM变换器。因此，涉及基于药物的GFM和电网跟随（GFL）转换器的基于药物的高压直流系统的稳定性问题尚未得到解决。为了解决这些问题，本研究从基于药品的高压直流系统的特点出发，提出了一种基于药品的GFM变流器的电力同步控制方案。随后，针对整个高压直流系统的稳定性分析，提出了基于dea的GFM变换器的dq-帧阻抗模型。最后建立了仿真平台，验证了模型的准确性和系统的稳定性。

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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