渝鄂柔性直流输电接入电网高频谐振与抑制分析
摘要：针对渝鄂柔性直流输电(voltage source converter based high voltage direct current transmission，VSC-HVDC)南通道渝侧接入交流电网产生的系统高频谐振，应用阻抗分析法对影响系统稳定的柔性直流输电换流器特性进行了分析。利用渝鄂柔性直流输电换流器和交流线路参数，建立了换流器和交流线路阻抗的数学模型。应用MATLAB进行了仿真计算，得到换流器和交流线路的阻抗幅频、相频特性。对渝鄂柔性直流输电南通道渝侧二次高频振荡进行了深入剖析，找到了引起高频振荡的原因。最后，提出了渝鄂柔性直流输电高频振荡抑制策略，通过PSCAD仿真计算验证了抑制策略的正确性。
Abstract:In view of the high frequency resonance generated by Yu side connected to the AC grid in the Yu to E voltage source converter based high voltage direct current transmission (VSC-HVDC) south channel project, the characteristics of VSC-HVDC converter affecting the system stability were analyzed with the impedance analysis method. Mathematical model of the converter and AC line equivalent impedance was established by using the parameters of the converter and AC lines in Yu to E VSC-HVDC project. The impedance amplitude-frequency characteristics and phase-frequency characteristics of the converter and AC lines were obtained by applying MATLAB simulation calculation. The twice cases of high-frequency resonance in Yu side of the Yu to E back-to-back (BTB) VSC-HVDC south channel project were carried out in-depth analysis, and the cause of high frequency resonance was found by the analysis result. Finally, the high frequency resonance suppression strategy was put forward in Yu to E BTB VSC-HVDC project, and was verified by PSCAD simulation calculation.
标题：渝鄂柔性直流输电接入电网高频谐振与抑制分析
title:Analysis of High Frequency Resonance and Suppression in Yu to E VSC-HVDC Project Connected to Power Grid
作者：杨万开, 王兴国, 王书扬
authors:Wankai YANG, Xingguo WANG, Shuyang WANG
关键词：柔性直流输电(VSC-HVDC),高频谐振,阻抗分析法,抑制策略,仿真计算,
keywords:voltage source converter based high voltage direct current transmission (VSC-HVDC),high frequency resonance,resistance analysis method,suppression strategy,simulation calculation,
