全球能源互联网2025，Vol.8Issue(4)：489-496,8.DOI:10.19705/j.cnki.issn2096-5125.20240234
张北柔直工程近工频次同步振荡机理及振荡抑制策略
Mechanism and Mitigation Strategy of Near-power-frequency Sub-subsynchronous Oscillation in Zhangbei VSC-HVDC Project
摘要
Abstract
The high proportion power electronic system composed of new energy and VSC-HVDC system has oscillation risk,near-power-frequency sub-synchronous oscillation from 40 Hz to 50 Hz many times.Based on impedance analysis method,this article analyzes the impedance characteristics of new energy and VSC-HVDC in the near rated frequency sub-synchronous band,determines that the oscillation comes from the mutual effect between wind farm with'inductive and negative resistance'and VSC-HVDC with'capacitive and positive resistance'impedance.To suppress sub-synchronous oscillation at near rated frequency,a voltage single-loop control scheme is proposed in VSC-HVDC,which weakens the capacitive characteristics of the sub-synchronous frequency band and increases the phase margin.Finally,based on on-site experiments of the Zhangbei VSC-HVDC project,the correctness of the proposed oscillation mechanism analysis and the effectiveness of the oscillation suppression strategy were verified.关键词
柔性直流输电/近工频次同步振荡/电压单环控制/振荡抑制Key words
VSC-HVDC/near-power-frequency sub-synchronous oscillation/single-loop control/oscillation mitigation分类
信息技术与安全科学引用本文复制引用
马秀达,卢宇,汪楠楠,吕润东,王仙荣..张北柔直工程近工频次同步振荡机理及振荡抑制策略[J].全球能源互联网,2025,8(4):489-496,8.基金项目
国家电网有限公司科技项目(5108-202218280A-2-312-XG).Science and Technology Foundation of SGCC(5108-202218280A-2-312-XG). （5108-202218280A-2-312-XG）
