摘要
针对由电网侧电气小扰动引起的机网扭振现象,提出了一种储能系统(ESS)的双馈风电机组(DFIG)机网扭振抑制策略。通过建立储能系统的数学模型,提出了储能系统的附加阻尼控制策略,利用储能系统既能输出无功也能输出有功的特点,根据风电机组母线电压偏差信号及电网电压频率偏差信号,控制储能系统的无功及有功功率的输出,在电网发生故障或者干扰时,稳定母线电压,抑制频率波动,从而及时有效地抑制机网扭振。仿真结果表明,对于传输线路末端无限大电网的电压暂降和频率波动的干扰引起的风电机组轴系扭振,储能系统能够有效地进行抑制。
A strategy for suppressing the generator-grid torsional vibration induced by small grid-side distur- bance is proposed for the DFIG（Doubly-Fed Induction Generator） system with ESS（Energy Storage System）. A mathematical ESS model is established and an additional damping control strategy of ESS is proposed, which controls the active and reactive power outputs of ESS according to the voltage deviation of DFIG bus and the frequency deviation of power grid to stabilize the bus voltage and depress the frequency fluctuation during grid fault or disturbance for suppressing the generator-grid torsional vibration. The simulative results prove that,the DFIG torsional vibration induced by the voltage sag and frequency fluctuation of infinite power grid at the end of transmission line can be effectively suppressed by ESS.
出处
《电力自动化设备》
EI
CSCD
北大核心
2016年第8期33-39,共7页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(51277119)~~
关键词
双馈风电机组
储能系统
扭振
抑制策略
附加阻尼控制
电压偏差
频率偏差
doubly-fed induction generator
energy storage system
torsional vibrations
suppression strategy
additional damping control
voltage deviation
frequency deviation
