混合多馈入受端系统中MMC与LCC交互振荡特性建模与分析OA
Modeling and Analysis of Interactive Oscillation Characteristics Between MMC and LCC in Hybrid Multi-infeed Receiving-end System
随着柔性直流输电技术的快速发展,受端电网将逐渐呈现出柔性直流输电与常规直流输电混合多馈入的场景.文中基于全系统阻抗法研究了混合多馈入受端电网中模块化多电平换流器(MMC)与电网换相换流器(LCC)间的交互振荡特性.首先,基于谐波状态空间法分别建立了计及谐波耦合特性的MMC和LCC的宽频阻抗模型,并进一步构建了受端系统的全系统阻抗模型.其次,基于全系统阻抗分析法研究了混合多馈入受端系统的潜在振荡风险、主导振荡节点及其关键影响因素,进而确定源-荷划分方案,分析MMC与LCC之间的交互振荡特性.最后,通过搭建LCC-MMC混合双馈入受端系统的时域仿真模型,验证了理论分析的正确性.
With the rapid development of voltage source converter based high voltage direct current(VSC-HVDC)transmission technology,receiving-end power grids will gradually present a hybrid multi-infeed scenario incorporating both VSC-HVDC and conventional HVDC transmission.This paper studies the interactive oscillation characteristics between the modular multilevel converter(MMC)and the line commutated converter(LCC)in a hybrid multi-infeed receiving-end system based on the whole-system impedance method.Firstly,based on the harmonic state-space method,the wide-frequency impedance models of the MMC and LCC considering harmonic coupling characteristics are established,respectively,and a whole system impedance model of the receiving-end system is further constructed.Secondly,based on the whole system impedance analysis method,the potential oscillation risks,dominant oscillation nodes,and key influencing factors of the hybrid multi-infeed receiving-end system are studied,and then the source-load partitioning scheme is determined to analyze the interactive oscillation characteristics between MMC and LCC.Finally,the correctness of the theoretical analysis is verified by establishing a time-domain simulation model of an LCC-MMC hybrid dual-infeed receiving-end system.
韩兴宇;张梦瑶;吕敬;张啸虎;朱峰;许凌
电力传输与功率变换控制教育部重点实验室(上海交通大学),上海市 200240国家电网有限公司华东分部,上海市 200120电力传输与功率变换控制教育部重点实验室(上海交通大学),上海市 200240国家电网有限公司华东分部,上海市 200120国家电网有限公司华东分部,上海市 200120国家电网有限公司华东分部,上海市 200120
混合多馈入受端系统柔性直流输电振荡阻抗模型模块化多电平换流器电网换相换流器
hybrid multi-infeed receiving-end systemvoltage source converter based high voltage direct current(VSC-HVDC)transmissionoscillationimpedance modelmodular multilevel converter(MMC)line commutated converter(LCC)
《电力系统自动化》 2026 (11)
61-72,12
国家电网有限公司华东分部科技项目(52992425001M). This work is supported by East Branch of State Grid Corporation of China(No.52992425001M).
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