双馈风机虚拟惯量控制对电力系统暂态稳定的影响
摘要：双馈风力发电机(DFIG)虚拟惯量控制在满足系统调频需求的前提下,其快速响应特性也会对系统暂态稳定造成影响。首先分析了DFIG机端母线电压不同跌落深度条件下DFIG的暂态有功响应特性,指出DFIG虚拟惯量控制影响系统暂态稳定的条件。基于此,结合拓展等面积定则分析了带有虚拟惯量控制的DFIG对电力系统暂态稳定的影响机理,最后进行时域仿真验证,结果表明,故障后若未触发DFIG低电压穿越控制,则含虚拟惯量控制的DFIG在S机群时可改善系统暂态稳定性, 而在R机群并网时会恶化系统暂态稳定性。研究结果为DFIG虚拟惯量控制的应用和优化提供参考。
Abstract:Virtual inertia control of doubly-fed induction generator (DFIG) can improve the frequency stability, and its transient response characteristic may have impact on the transient stability of power system. Based on the analysis of transient active power output characteristics of DFIG under different depth of voltage sags, the transient active power output of DFIG is determined by virtual inertia control. Furthermore, the influence of virtual inertia control of DFIG on transient stability of power grid is investigated by using the extended equal area criterion (EEAC). The time domain simulation results indicate that DFIG with virtual inertia control in S group can improve transient stability of power grid, and DFIG with virtual inertia control in R group can deteriorate transient stability of power grid if low voltage ride through control of DFIG is not triggered after failure. The results give some suggestions on the application and optimization of virtual inertia control of DFIG.
标题：双馈风机虚拟惯量控制对电力系统暂态稳定的影响
英文标题：Impact of Virtual Inertia Control of Doubly-fed Induction Generator on Power System Transient Stability
作者：陈汉杰, 罗毅, 张磊, 韩华玲,
关键词：双馈风机, 调频, 虚拟惯量, 暂态稳定, 送端, 受端,
发表日期：2018-07-09
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