南方电网技术2016，Vol.10Issue(5)：75-79,5.DOI:10.13648/j.cnki.issn1674-0629.2016.05.011
柔性直流输电系统阻抗稳定性分析
Analysis of Impedance Stability of VSC-HVDC Systems
摘要
Abstract
Based on ESAC (energy system analysis consortium)standard of the impedance analysis method,the impedance character-istics and stability for the voltage source converter based HVDC (VSC-HVDC)are analyzed. Firstly,an equivalent circuit of the VSC-HVDC system is established. The impedance characteristics of the VSC-HVDC system are analyzed by using a complex-frequen-cy domain equivalent circuit. A practical stability criterion,based on ESAC standard to determine the stability of VSC-HVDC system, is proposed. Secondly,the Nyquist curves of the VSC-HVDC system under different PI control parameters are calculated and obtained in the complex-frequency domain. The stabilities of the VSC-HVDC system are verified through the Nyquist curves. Finally,the time domain electromagnetic transient simulation results of the VSC-HVDC system performed in PSCAD/EMTDC show that the stabilities of the VSC-HVDC system are similar to that produced in the complex-frequency domain,which further proofs that the presented stabil-ity criterion is suitable for stability analysis of the VSC-HVDC system to select the optimal control parameters.关键词
阻抗分析/柔性直流输电/Nyquist曲线/PI控制参数/稳定性Key words
impedance analysis/VSC-HVDC/Nyquist curve/PI control parameters/stability分类
信息技术与安全科学引用本文复制引用
吴学光,孙银锋,李国庆..柔性直流输电系统阻抗稳定性分析[J].南方电网技术,2016,10(5):75-79,5.基金项目
国家电网公司科技项目（SGTYHT／14－JS－188）。@@@@Supported by the Science and Technology Project of State Grid （SGTYHT／14－JS－188）． （）
