Control strategies for output power smoothening of DFIG with SVC in wind conversion system

Ankita Jain, P. Singh, S. Singh
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引用次数: 5

Abstract

Due to increasing penetration of wind power generation, new challenges are originating from the intermittent nature of wind. Some of the challenges are maintaining frequency stability and output power smoothening. These will necessitate the control of wind turbines in order to maintain the stability rather than extracting the maximum power. This paper proposes a new control scheme for the output power smoothening of wind turbine termed as rotor inertia control. The controller is controlled to emulate inertia of turbine by allowing the turbine speed to vary over a wide range, thus, utilizing the part of kinetic energy of the wind. By using this controller, output power is reduced by some amount by maximum power point, so a controlled switch is used, by which one can switch between Maximum Power Point Tracking (MPPT) controller and rotor inertia controller during healthy and abnormal conditions, respectively. Further Static VAR Compensator (SVC) is used to improve the voltage profile of the system. The proposed control scheme is validated using Matlab/Simulink under different conditions.
基于SVC的风电系统DFIG输出功率平滑控制策略
随着风力发电的日益普及,风能的间歇性也带来了新的挑战。其中一些挑战是保持频率稳定性和输出功率平滑。这些将需要控制风力涡轮机,以保持稳定,而不是提取最大功率。本文提出了一种新的风力发电机组输出功率平滑控制方案——转子惯量控制。控制器被控制来模拟涡轮机的惯性,通过允许涡轮机的速度在一个很宽的范围内变化,从而利用风的动能的一部分。利用该控制器,通过最大功率点使输出功率减小一定程度,因此采用受控开关,可以在健康状态和异常状态下分别在最大功率点跟踪(MPPT)控制器和转子惯性控制器之间切换。进一步采用静态无功补偿器(SVC)来改善系统的电压分布。利用Matlab/Simulink在不同条件下对所提出的控制方案进行了验证。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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