特高压直流孤岛运行特性与稳定控制研究综述

摘要

Island operation mode formed by UHVDC and its matching power plants is getting more common in China these years. Moreover, AC tie-lineN?2 faults can force to form UHVDC island operation mode. There are many stability issues of UHVDC isolated island operation grid. This paper summarizes the latest progress and research status about real-time simulation methods, voltage stability, frequency stability, over-voltage and sub-synchronous oscillations in UHVDC isolated island grid. The features and deficiencies of present simulation modeling methods are pointed out. The related research contents of the operational characteristics and stability control methods for UHVDC isolated island grid are put forward, which can be taken as references for future research on UHVDC isolated island system.%分析了特高压直流输电系统与配套电源形成送端孤岛运行方式或交流联络线N?2被迫形成的孤岛运行方式下系统存在的主要稳定问题及其特征.概述了特高压直流孤岛系统实时仿真建模技术、频率稳定、电压稳定、过电压、次同步振荡和机组间相互作用等几个方面的研究现状,指出了现有直流孤岛系统仿真建模、稳定分析方法的特点与不足,提出了针对特高压直流孤岛系统运行特性与稳定控制技术研究内容,可为今后在这一领域的工程研究与技术开发提供参考意见.