利用无源阻尼lcl滤波器串级PI控制改善wcs的功率因数

2015 International Conference on Sustainable Mobility Applications, Renewables and Technology (SMART) Pub Date : 2015-11-01 DOI:10.1109/SMART.2015.7399267

F. Hamoud, M. Doumbia, A. Chériti

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引用次数: 5

摘要

本文提出了一种消除STATCOM中功率半导体换流引起的开关纹波的算法。lcl过滤器是实现这一目标的最佳解决方案;但由于共振现象的存在，降低了系统的稳定性。无源阻尼电阻可与lc滤波器容量串联插入以解决这一问题。为了减少滤波器组件之间的相互作用和控制算法的复杂性，将lcl滤波器分为三个部分。此外，为了提高系统的动态性，提出了串级PI控制。采用电阻与电容串联的方法，对阻尼谐振现象进行了不同的设计步骤。我们的研究表明，注入电网的电压和电流的总谐波失真(THD)趋于零。这意味着，与使用l滤波器得到的结果相比，无源阻尼lc滤波器衰减了大部分电流纹波。

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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Power factor improvement in WECS using cascade PI control of passive damping LCL-filter

This work proposes an algorithm for the elimination of switching ripples caused by the commutation of power semiconductors used in STATCOM. LCL-filter is a favorite solution to achieve this goal; however it reduces the stability of the system with the presence of resonance phenomena. Passive damping resistor can be inserted in series with capacity of LCL-filter to solve this problem. The LCL-filter is divided into three parts in order to reduce the interaction between filter components and the complexity of the control algorithm. Moreover, in order to improve the dynamic of the system, a cascade PI control is proposed. Different design steps are presented with damping resonance phenomena using a resistor connected in series with the capacitance. Our investigations show that the Total Harmonic Distortion (THD) of voltage and current injected into the grid tends to zero. That means, the passive damping LCL-filter attenuates the major part of current ripples compared with results obtained by using L-filter.

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来源期刊

2015 International Conference on Sustainable Mobility Applications, Renewables and Technology (SMART)

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