摘要
在大型风电场经柔性直流输电系统并入交流电网的场合,传统的电网调频方法难以适用。提出一种频率控制策略,分别在逆变侧换流器、整流侧换流器和风电机组上设计响应频率变化的控制环节。所有控制环节均基于本地测量的信号,无需远距离通信。该方法可以使风电场参与交流系统调频,此外,当系统故障引起柔性直流送出容量受限时,该方法可以自动降低风电机组功率,防止直流侧过压保护动作。
Traditional frequency control approaches are generally not applicable for large-scale wind farms integrated to AC gird through VSC-HVDC(Voltage Source Converter based HVDC). In this regard,a frequency control approach is proposed. Supplementary controllers corresponding to frequency variation in receiving end,sending end and wind farm are designed based on local measurements to reduce reliance on communication. Wind farms can participate in the frequency regulation of AC grid using this approach. In addition,during the case that fault conditions result in limited transmission capacity of VSC-HVDC,wind farms can decrease their power outputs to avoid over-vol-tage in the DC side of VSC-HVDC.
作者
杨金刚
袁志昌
李顺昕
郭佩乾
石少伟
丁海龙
YANG Jingang;YUAN Zhichang;LI Shunxin;GUO Peiqian;SHI Shaowei;DING Hailong(Slate Grid Jibei Electric Economic Research Institute,Beijing 100038,China;Department of Electrical Engineering,Tsinghua University,Beijing 100084,China)
出处
《电力自动化设备》
EI
CSCD
北大核心
2019年第6期109-114,共6页
Electric Power Automation Equipment
关键词
柔性直流输电
风电场
频率控制
过压保护
VSC-HVDC
wind farm
frequency control
over-voltage protection
