南方电网技术2025，Vol.19Issue(12)：43-54,87,13.DOI:10.13648/j.cnki.issn1674-0629.2025.12.005
新型注入式电网换相换流器的拓扑及控制
Topology and Control of New Reinjection Line Commutated Converter
摘要
Abstract
In the field of direct current transmission,the new reinjection line commutated converter(RLCC)based on the theory of harmonic reinjection has significant advantages over the traditional line commutated converter(LCC),such as internal harmonic sup-pression ability,complete suppression of commutation failure,and dual-mode operation with leading and lagging trigger angles and so on.Aiming at the problem that the existing RLCC cannot decouple active power and reactive power with a single control variable fir-ing angle,a new type of RLCC that can decouple power control is formed by adding freewheeling diodes to each reinjection branch of its shunt module and introducing modulation coefficient control variables.Based on topological structure and working principle,the theoretical current waveforms of AC and DC side are briefly analyzed.And the steady-state mathematical model of the new RLCC is derived.Based on the operating characteristics of the new RLCC,the working range of modulation coefficients,power operating range,and conditions for achieving unity power factor operation are determined.Finally,based on the current feedback control,a power decoupling control method is proposed combined with power factor feedforward control.The feasibility and correctness of the proposed control method are verified by simulation.关键词
调制系数/功率解耦控制/谐波注入/电流源型换流器Key words
modulation coefficient/power decoupling control/harmonic reinjection/current-source converter分类
信息技术与安全科学引用本文复制引用
梁欢,杨宝峰,王伟,武磊,白月光..新型注入式电网换相换流器的拓扑及控制[J].南方电网技术,2025,19(12):43-54,87,13.基金项目
内蒙古自治区高等学校碳达峰碳中和研究专项计划资助项目(STZX202323). Supported by the Research Special Program on Carbon Peak and Carbon Neutrality in Inner Mongolia Higher Education Institutions(STZX202323). （STZX202323）
