Improved Virtual Flux-Direct Power Control for PWM Rectifier Based on Second-Order Generalized Integrators

2020 International Conference on Electrical Engineering (ICEE) Pub Date : 2020-09-25 DOI:10.1109/ICEE49691.2020.9249885

S. Djabali, Melissa Ait Hamou Ali, A. Ammar

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Abstract

The AC-DC conversion system in the power system use generally the diode-bridge based rectifiers that cannot be reversible and causes high current distortion. Besides, they reduce the power factor and energy quality. recently, the application of three-phase pulse width modulation (PWM) rectifier has been risen quickly due to breakthrough advancement in the power devices. This converter is widely used in many applications such as electrical drives and renewable energy conversion systems. It offers plenty of advantages, mainly sinusoidal input currents and minimized harmonic distortion and unity power factor. This work presents an improved sensorless control for performance enhancement purpose of the PWM-rectifier. The proposed control strategy uses the virtual flux principle with second-order generalized integrator (SOGI) in order to overcome the accompanying drawbacks of using pure integrator of low-pass filters for estimation. The integration of improved virtual flux estimator with direct power control saves the cost of using many voltage sensors which can increase the reliability and effectivity of the control system. The different proposed approaches have been investigated through simulation using MATLAB/Simulink software.

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基于二阶广义积分器的PWM整流器的改进虚拟磁通直接功率控制

在电力系统中，交直流转换系统一般采用基于二极管桥的整流器，这种整流器不可逆，电流畸变大。此外，它们还降低了功率因数和能源质量。近年来，由于功率器件的突破性进展，三相脉宽调制整流器的应用迅速兴起。该转换器广泛应用于电力驱动和可再生能源转换系统等许多应用中。它具有许多优点，主要是输入电流为正弦波，谐波失真最小，功率因数统一。这项工作提出了一种改进的无传感器控制，以提高pwm整流器的性能。该控制策略采用二阶广义积分器(SOGI)的虚通量原理，克服了低通滤波器使用纯积分器进行估计的缺点。将改进的虚拟磁链估计器与直接功率控制相结合，节省了使用多个电压传感器的成本，提高了控制系统的可靠性和有效性。利用MATLAB/Simulink软件对不同的方法进行了仿真研究。

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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2020 International Conference on Electrical Engineering (ICEE)

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