电力系统保护与控制2024，Vol.52Issue(16)：150-161,12.DOI:10.19783/j.cnki.pspc.231394
基于阻尼系数灵敏度的风光电网动态交互分析与稳定提升方法
Dynamic interaction analysis and stability improvement method for wind/PV integrated power systems based on damping coefficient sensitivity
摘要
Abstract
Dynamic interactions among wind power,photovoltaic(PV),and synchronous generators(SG)affect power system stability.The dynamic interaction mechanism and stabilization enhancement method in the wind/PV integrated power system are studied based on the sensitivity of the damping coefficient.First,the impact of the doubly-fed induction generator(DFIG)and PV generators on the transient response to the SG is determined using linearized expression.Secondly,the closed-loop transfer function of the DFIG/PV integrated power system is derived to analyze the dynamic interaction process among the DFIG,PV,and SG.The damping coefficients provided by DFIG and PV to SG are newly derived to quantify the impact of the DFIG/PV on power system oscillation.Then,an analytical expression for the sensitivities of the damping coefficients to the output of the DFIG/PV is proposed.It is used as the gradient information of the interior point method to improve power system stability by adjusting the outputs of the DFIG/PV.Finally,the simulation results verify that adjusting the output of DFIG/PV can improve the damping of dangerous modes of PV/DFIG and the stability of the system.The calculation efficiency and accuracy of the optimization method with sensitivity as gradient information are verified.The average amplitudes of the power angle with and without optimization are 25.1589° and 18.0165° respectively.关键词
风光并网/低频振荡/阻尼转矩/传递函数/灵敏度Key words
wind/PV integrated power system/low-frequency oscillation/damping torque/transfer function/sensitivity引用本文复制引用
李生虎,陈东,叶剑桥,齐楠,徐志雄..基于阻尼系数灵敏度的风光电网动态交互分析与稳定提升方法[J].电力系统保护与控制,2024,52(16):150-161,12.基金项目
This work is supported by the National Natural Science Foundation of China(No.51877061). 国家自然科学基金项目资助(51877061) （No.51877061）
