并网中MMC-HVDC两条线路并联运行的研究

H. Saad, P. Rault, S. Dennetière
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引用次数: 1

摘要

由于风力发电厂和高压直流输电线路的大规模渗透,电力电子设备在现有交流电力系统中的安装份额正在显著增加。当连接到弱网或孤岛网时,vdc - hvdc链路可以以VF控制(或电网形成模式)运行,以克服pq控制(或电网馈电模式)的限制。目前,由于静态和动态的限制,当多个高压直流链路并联运行时,VF控制是一个挑战。本文给出了两条以成网方式连接孤岛电网的高压直流链路的动态特性。为了提供一个现实的测试案例,孤岛电网以法国北部电网为基础。本文分析了VF控制中2个直流链路间的交流故障和控制不稳定问题。这些EMT研究提供了对高压直流在VF控制下运行时动态网络行为的洞察。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Investigation on parallel operation of two MMC-HVDC links in grid forming connected to an existing network
The share of power electronics installations into existing ac power systems is significantly increasing due to the massive penetration of wind power plants and HVDC links. VSC-HVDC link can operate in VF -control (or grid-forming mode) when connected to a weak or islanded network to overcome the PQ-control (or grid-feeding mode) limitation. Up to now, the VF -control represents a challenge due to static and dynamic limits when several HVDC links are in parallel operation. This paper provides a dynamic performance of two HVDC links in grid forming mode connected to an islanded grid. To provide a realistic test case, the islanded grid is based on the Northern France network. AC fault and control instabilities between 2 HVDC links in VF control are analyzed in this work. These set of EMT studies provide an insight on dynamic network behavior when HVDC is operating in VF control.
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