开环模式谐振引发含变速风电机组电力系统振荡的机理分析

发布时间：2018-01-24 17:27

本文关键词： 变速风电机组开环模式谐振动态交互直驱型风电机组双馈型风电机组　出处：《中国电机工程学报》2017年22期 　论文类型：期刊论文

【摘要】：针对变速风电机组控制环节间交互作用对系统稳定性影响,该文构建了由两个开环子系统组成的闭环互联系统模型。基于所构建模型,从开环模式谐振角度揭示含变速风电机组电力系统的振荡机理。当两个开环子系统对应的开环模式在复平面分布位置接近时将引发开环模式谐振,此时控制环节间将呈现强动态交互作用,使子系统开环模式对应的闭环特征根朝相反方向移动,其中一谐振特征根朝复平面虚轴方向移动,导致系统阻尼水平的降低。提出一种估计开环模式谐振条件下闭环特征根在复平面分布位置的方法,进而评估系统阻尼水平。此外,分析了变速风电机组与电网的连接强度、系统运行点对开环模式谐振的影响。最后,通过直驱和双馈风电系统仿真算例对所提分析方法和结论进行了验证。
[Abstract]:In view of the influence of variable speed wind turbine control interaction on the stability of the system, this paper constructed by two open-loop system composed of closed-loop system model based on Internet. The model, reveal the oscillation machine with variable speed wind turbine power system from the open-loop mode resonant angle. When the two open loop system corresponding to the the open loop mode in the complex plane location close to the open loop mode will cause resonance, then the control link will show strong dynamic interaction, the closed-loop subsystem eigenvalues in open loop mode corresponding to move in opposite directions, one resonant eigenvalue complex plane toward the imaginary axis direction, which leads to the decrease of the damping of the system level. This paper proposes a method to estimate the open loop mode resonant conditions of closed-loop characteristic roots in the complex plane distribution method, and evaluate the system damping level. In addition, the analysis of variable speed wind turbine and grid connected Finally, through direct drive and doubly fed wind power system simulation example, the proposed analytical methods and conclusions are verified.

【作者单位】：新能源电力系统国家重点实验室(华北电力大学);
【基金】：国家重点研发计划项目(2016YFB0900602)~~
【分类号】：TM712
【正文快照】： 影响,该文构建了由两个开环子系统组成的闭环互联系统模型。基于所构建模型,从开环模式谐振角度揭示含变速风电机组电力系统的振荡机理。当两个开环子系统对应的开环模式在复平面分布位置接近时将引发开环模式谐振,此时控制环节间将呈现强动态交互作用,使子系统开环模式对应的

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