摘要
特高压直流输电是解决大规模风电外送问题的较好方案。基于DIg SILENT仿真软件,建立风火打捆特高压孤岛直流外送系统仿真模型,深入研究风功率波动情况下对送端换流站交流母线电压、频率波动的影响。提出利用直流功率调制实现特高压直流输电系统不完全跟随风功率波动的控制策略,并研究其关键参数对送端换流母线电压和频率的影响。仿真结果表明,直流功率调制为抑制风功率波动对风火打捆特高压孤岛直流外送系统的影响提供了一种有效的手段,其关键参数调制增益值越大,对电压稳定性的改善越差,对频率稳定性的改善越好。
UHVDC power transmission is a better solution for large-scale transmission of wind farm. Based on DIg SILENT simulation software,the wind-thermal-bundle islanded system with UHVDC link simulation model is built,and studied on the wind power fluctuations on the flow effect of AC bus voltage and frequency fluctuation. The control strategy of DC system not fully follows power fluctuations by DC power modulation is proposed,and studied the influence of key parameters on the bus voltage and frequency of DC delivery system. The simulation results show that the DC power modulation provides an effective means for the inhibitory effect of wind power fluctuation of wind-thermalbundle islanded system with UHVDC link. The key parameters of modulation gain value are greater,the voltage stability improvement worse,and frequency stability improvement better.
出处
《电测与仪表》
北大核心
2016年第5期109-112,123,共5页
Electrical Measurement & Instrumentation
基金
国家自然科学基金资助项目(51367015)
国网新疆电网项目(SGXJ0000DKJS1440234)
新疆维吾尔自治区项目(201491112)
关键词
特高压直流输电
风火打捆
风功率波动
直流功率调制
UHVDC power transmission
wind-thermal-bundle
wind power fluctuations
DC power modulation
