DFIG-PSS附加阻尼转矩解析表达和安装位置比较  

Analytical Expression and Location Comparison of Additional Damping Torque of DFIG-PSS

作　　者：李生虎[1] 尚昱锟 方天扬 张亚海 LI Shenghu;SHANG Yukun;FANG Tianyang;ZHANG Yahai(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,合肥230009

出　　处：《大电机技术》2020年第6期77-83,共7页Large Electric Machine and Hydraulic Turbine

基　　金：国家自然科学基金(51877061)。

摘　　要：在双馈异步发电机(DFIG)中配置电力系统稳定器(PSS),有助于增强电力系统阻尼振荡的能力。基于DFIG详细模型,建立含DFIG电力系统传递函数,得到以DFIG转速为输入的DFIG附加转矩解析表达。利用附加转矩幅值和相角,分析DFIG提供给区间模式阻尼转矩的大小和性质,整定DFIG-PSS参数。考虑DFIG-PSS安装在转子侧变流器(RSC)或网侧变流器(GSC),分析安装位置对阻尼振荡能力的影响。算例分析验证了所提附加转矩解析表达的正确性。当DFIG-PSS安装在RSC时,对区间模式振荡幅值改善效果较好;DFIG-PSS安装在GSC时,对区间模式振荡收敛速度改善效果较好。The power system stabilizer(PSS)is installed in a doubly-fed induction generator(DFIG)to help enhance the ability of the power system to dampen oscillations.Based on the DFIG detailed model,the DFIG power system transfer function is established,and the DFIG additional torque analysis expression with DFIG rotor speed as input is obtained.According to the additional torque amplitude and phase angle,the magnitude and nature of the DFIG provided to the inter-area modes damping torque are analyzed,and the DFIG-PSS parameters are set.The effect of the installation position on the damped oscillation capability is analyzed considering the DFIG-PSS installed on the rotor-side converter(RSC)or the grid-side converter(GSC).The analysis of the example verifies the correctness of the proposed additional torque analysis.When DFIG-PSS is installed on RSC,the improvement of interval mode oscillation amplitude is better.When DFIG-PSS is installed on GSC,the convergence speed of interval mode oscillation is better.

关 键 词：风电系统 低频振荡 双馈异步发电机(DFIG) DFIG附加转矩 电力系统稳定器 

分 类 号：TM351[电气工程—电机]