南方电网技术2024，Vol.18Issue(7)：19-26,8.DOI:10.13648/j.cnki.issn1674-0629.2024.07.003
中小容量VSC-HVDC在解决电力系统电磁环网问题的应用
Application of Small and Medium Capacity VSC-HVDC in Solving the Electromagnetic Loop Network Problem of Power System
摘要
Abstract
Electromagnetic loop network can improve the reliability of power supply in the power grid,but it can also cause problems such as increased short-circuit current and line overload after faults.At present,grid operators mainly adopt measures such as loop breaking operation and mode pre-control to reduce the operational risks of electromagnetic loop networks in China Southern Power Grid.However,loop breaking operation is not applicable to all scenarios,and mode pre-control may cause power outputs limited.Therefore,this article proposes to apply the small and medium capacity VSC-HVDC to the low-voltage power grid with electromagnetic loop network,utilizing the flexible and controllable characteristics of VSC-HVDC to reduce the operational risk of the electromagnetic loop network.Firstly,comprehensively considering the requirements of the"Guidelines for Power System Safety and Stability"as well as the economy,the interconnected location and capacity of VSC-HVDC are determined in the electromagnetic loop network.Subsequently,the principles for determining the DC voltage,topology structure,and equipment parameters of VSC-HVDC are provided.Secondly,a control strategy for VSC-HVDC in the electromagnetic loop network is put forward,which can reduce network losses and improve the stability of the electromagnetic loop network.Finally,the effectiveness of the proposed small and medium capacity VSC-HVDC scheme is verified in reducing the operation risks of the electromagnetic ring network through example simulation.关键词
中小容量VSC-HVDC/电磁环网/模块化多电平换流器/异同步控制Key words
small and medium capacity VSC-HVDC/electromagnetic loop network/modular multilevel converter/asynchronous control分类
动力与电气工程引用本文复制引用
孙鹏伟,周保荣,姚文峰,李诗旸,付超,苏寅生,梅勇..中小容量VSC-HVDC在解决电力系统电磁环网问题的应用[J].南方电网技术,2024,18(7):19-26,8.基金项目
国家自然科学基金企业创新发展联合基金项目(U22B6007) （U22B6007）
中国南方电网有限责任公司科技项目(ZDKJXM20200059).Supported by the Enterprise Innovation and Development Joint Fund Project of National Natural Science Foundation of China(U22B6007) （ZDKJXM20200059）
the Science and Technology Project of China Southern Power Grid Co.,Ltd.(ZDKJXM20200059). （ZDKJXM20200059）
