电力系统保护与控制2024，Vol.52Issue(23)：86-94,9.DOI:10.19783/j.cnki.pspc.240216
改进换相过程的SLCC拓扑及控制策略
SLCC topology and control strategy for an improved commutation process
摘要
Abstract
Line commutated converter-based high voltage direct current(LCC-HVDC)can be widely used in long-distance large-capacity power transmission,but its AC side requires the installation of a large amount of filtering equipment and reactive power compensation devices.This equipment occupies a large area and is not flexible,restricting the development of this scheme.To address this,self-adaption statcom and line commutation converter(SLCC)technology with a static synchronous compensator(STATCOM)in parallel on the valve side can achieve continuous regulation of reactive power by virtue of its continuous adjustment characteristics.This paper analyses the working principle and commutation process of SLCC,and proposes a coordinated control strategy that combines reactive power compensation and harmonic filtering,introducing reactive power,harmonic,and firing angle compensation and other links to dynamically track and process reactive power and harmonic current.Finally,simulation verification is carried out on the PSCAD/EMTDC platform.The results show that the proposed control strategy can achieve dynamic reactive power compensation and harmonic accurate filtering of the system,accelerate the commutation process,and effectively reduce reactive power consumption and investment cost.关键词
高压直流输电/换相过程/SLCC/STATCOM/动态无功补偿Key words
HVDC transmission/commutation process/SLCC/STATCOM/dynamic reactive power compensation引用本文复制引用
丁瑞,邓雪凝,赵成勇,贾秀芳,申笑林,梁晨光,郭春义..改进换相过程的SLCC拓扑及控制策略[J].电力系统保护与控制,2024,52(23):86-94,9.基金项目
This work is supported by the Science and Technology Project of State Grid Corporation of China"Design and Research of SLCC DC System Adapting to New Energy Transmission"(No.5200-202356128A-1-1-ZN). 国家电网公司科技项目资助"适应于新能源送出的SLCC直流系统设计研究"(5200-202356128A-1-1-ZN) （No.5200-202356128A-1-1-ZN）
国家重点研发计划项目资助(2021YFB2400900) （2021YFB2400900）
