基于DFIG-DC的自主风电系统电压控制

Rishabh Dev Shukla, Subhaiit Roy, G. Sarkar
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引用次数: 0

摘要

提出了一种自主DFIG-DC风力发电系统的控制技术。在自主DFIG-DC风力发电系统中,定子和转子分别通过二极管桥式整流器和控制器电力电子变换器与直流负载或微电网相连。直流电压调节是单机运行和直流微网并网运行的必然要求。定子频率和直流侧电压的调节是通过间接控制方案来实现的,该间接控制方案通过在以转差频率旋转的极坐标系中设计的控制器来保持直流电压和频率恒定。与其他传统的场定向控制技术相比,该控制技术非常简单,易于实现。滞回电流控制器通过计算出的转子实际电流与参考电流之间的误差信号作为驱动,为转子侧控制的电力电子变换器提供控制脉冲。采用间接控制方法计算转子参考电流。采用MATLab和Simulink软件平台设计了自主DFIG-DC风力发电系统。通过不同可能情况下的仿真,验证了系统的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Voltage Control in an Autonomous DFIG-DC based Wind Energy System
This paper proposes a control technique for an autonomous DFIG-DC wind energy generation system. In autonomous DFIG-DC wind energy generation system, the stator and the rotor are connected to a dc load or micro-grid by a diode bridge rectifier and a controller power electronics converter respectively. DC voltage regulation is visibly necessary for stand-alone operation and DC micro-grid connected operation. The stator frequency and the DC side voltage regulation are achieved by an indirect control scheme, where maintaining constant DC voltage and frequency through a controller which is designed in polar coordinate frame rotating at slip frequency. Compared to other conventional techniques such as field-oriented control, the presented control technique is very simple and easy to implement. The hysteresis current controller provides the control pulses for rotor side controlled power electronics converter by the actuated by the error signal calculated between actual and reference rotor currents. The reference rotor currents are calculated by the presented indirect control scheme. The autonomous DFIG-DC wind energy generation system is designed MATLab and Simulink software platform. The performances of the system are verified by the simulations of different possible cases.
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