中国电机工程学报2024，Vol.44Issue(11)：4245-4260,中插6,17.DOI:10.13334/j.0258-8013.pcsee.222973
新能源基地经LCC-HVDC送出系统振荡机理分析与抑制策略(二):阻抗特性与振荡机理分析
Oscillation Mechanism Analysis and Suppression Strategy of Renewable Energy Base Connected into LCC-HVDC(Part Ⅱ):Impedance Characteristics and Oscillation Mechanism Analysis
摘要
Abstract
Based on the line commutated converter-based high voltage direct current(LCC-HVDC)impedance model established in Part I of the work,this paper analyzes the impedance characteristics and oscillation mechanism of the renewable energy base connected into LCC-HVDC.First,the composition relationship between LCC-HVDC AC port impedance at the sending end with the AC filter impedance and the AC impedance of the valve body is studied.The dominant influence of DC transmission line,receiving-end converter station and power grid strength on the AC port impedance of the valve body at the sending-end converter station is analyzed.Next,the overlapping effect of DC current loop control on the AC impedance of the valve body at the sending-end converter station is studied,and the formation mechanism of the negative damping characteristics of AC port impedance at the sending-end converter station in sub-/super-synchronous frequency band is analyzed.The coupling effects of the converter station and power grid strength at the receiving end on the AC port impedance characteristics at the sending end are discussed.Then,the equivalent model of the renewable energy base connected into LCC-HVDC is established to study the oscillation boundary conditions of the sending-end system.The influence law of LCC-HVDC on impedance characteristics of the renewable energy grid connection point is expounded,and the sub-/super-synchronous oscillation mechanism of different types of renewable energy bases,including permanent magnet synchronous generator(PMSG),doubly-fed induction generator(DFIG)and photovoltaic(PV),connected into LCC-HVDC is revealed.Finally,the simulation results of different types of renewable energy bases connected into LCC-HVDC verify the correctness and versatility of the proposed sub-/super-synchronous oscillation mechanism.关键词
新能源发电/电网换相换流器型高压直流/阻抗特性/振荡机理Key words
renewable energy generation/line commutated converter-based high voltage direct current(LCC-HVDC)/impedance characteristics/oscillation mechanism分类
信息技术与安全科学引用本文复制引用
肖云涛,李光辉,王伟胜,何国庆,甄妮..新能源基地经LCC-HVDC送出系统振荡机理分析与抑制策略(二):阻抗特性与振荡机理分析[J].中国电机工程学报,2024,44(11):4245-4260,中插6,17.基金项目
国家电网公司科技项目:荒漠地区大型新能源基地直流送出系统构建与综合评估技术研究(5100-202255354A-2-0-YS). Project Supported by Scientific Project of State Grid Corporation of China:Research on Construction and Comprehensive Evaluation Technology of Large-scale Renewable Energy Base Connected into HVDC Transmission System(5100-202255354A-2-0-YS). （5100-202255354A-2-0-YS）
