电力建设2024，Vol.45Issue(9)：113-122,10.DOI:10.12204/j.issn.1000-7229.2024.09.010
多直流馈入背景下江苏电网的直流换相失败问题评估及动态无功协调控制方法
Evaluation of DC Commutation Failures and Dynamic Reactive Power Coordination Control Method in Jiangsu Power Grid with Multi-Infeed DC Systems
摘要
Abstract
The safe operation of new receiving-end power grids that rely heavily on renewable energy and DC systems is often threatened by commutation failures within the DC systems. Therefore,three indicators used to evaluate the severity of these commutation failures are summarized and proposed in this study. For illustrative purposes,the severity of the DC commutation failures in the Jiangsu Power Grid are analyzed based on these parameters. Subsequently,a reactive power coordination control method is proposed to enhance the DC recovery ability in response to serious commutation failures. The following is an outline of the phases involved in our study. First,the operating state of the system and the output of some devices,such as MMC-DC converters,were obtained by considering the power flow control objectives. Second,dynamic reactive power sources strongly related to the concerned DC systems were identified based on voltage interaction factors. Third,the dynamic reactive power coordination control method was employed to enhance the recovery ability of the DC systems. Finally,the effectiveness of the proposed coordination control method was verified in a case study of the Jiangsu Power Grid.关键词
换相失败/受端电网/模块化多电平换流器(MMC)/统一潮流控制器(UPFC)/混合级联直流系统Key words
commutation failure/receiving-end power system/modular multilevel converter (MMC)/unified power flow controller (UPFC)/hybrid cascade DC system.分类
信息技术与安全科学引用本文复制引用
许凌,张君黎,张梦瑶,王国腾,徐政..多直流馈入背景下江苏电网的直流换相失败问题评估及动态无功协调控制方法[J].电力建设,2024,45(9):113-122,10.基金项目
国家电网有限公司华东分部科技项目(520800230025) This work is supported by the Research Projects of East China Branch of State Grid Corporation of China(No.520800230025). （520800230025）
