双馈风电机组低电压穿越问题研究

Research on the Low Voltage Ride through Capability of Connected Doubly Fed Wind Generator System

本文介绍了储能Crowbar和电网电压跌落时的无功需求,在此基础上本文提出了一种新的网侧变流器故障时无功控制策略,仿真验证了控制策略的有效性。接着提出了双馈电机风力发电系统低电压穿越的控制逻辑,在双馈电机风力发电系统仿真平台上运用Matlab/simulink,采用储能Crowbar和故障时无功控制策略以及叶尖速比控制等策略实现了双馈电机风力发电系统的低电压穿越。

This paper describes power storage crowbar and the demand of reactive power when grid voltage dips. The paper presents a new power control strategy, when the grid-side converter is failure. Then simulation results verify the effectiveness of the control strategy. Then, the study puts forward a set of control logic for the based low voltage ride through. In the doubly fed wind power system simulation platform built with Matlab/Simulink, the low voltage ride through of doubly fed wind power system is achieved by using the power storage crowbar and reactive power control strategy during the breakdown time.