一種三相并聯(lián)有源濾波器的仿真研究

一種三相并聯(lián)有源濾波器的仿真研究:針對廣泛使用的非線性負(fù)載產(chǎn)生諧波和導(dǎo)致功率因數(shù)較低的問題，在建立三相并聯(lián)型有源電力濾波器數(shù)學(xué)模型的基礎(chǔ)上，把滑模變結(jié)構(gòu)控制和模糊控制趨近律相結(jié)合，設(shè)計(jì)了一種基于模糊滑模變結(jié)構(gòu)控制策略、用于抑制電網(wǎng)諧波、提高負(fù)載功率因數(shù)的三相并聯(lián)型有源電力濾波器。模糊滑模變結(jié)構(gòu)控制方案不僅消除了滑模變結(jié)構(gòu)控制固有的高頻顫動(dòng)現(xiàn)象，對模型不確定性和外部干擾具有較強(qiáng)的魯棒性，而且改善了系統(tǒng)到達(dá)段的品質(zhì)，同時(shí)跟蹤誤差可收斂到零的一個(gè)鄰域內(nèi)。通過仿真對該控制模型進(jìn)行了驗(yàn)證，結(jié)果表明，方案切實(shí)可行，系統(tǒng)具有良好的動(dòng)靜態(tài)性能。?
關(guān)鍵詞：數(shù)學(xué)模型；模糊滑模變結(jié)構(gòu)控制；并聯(lián)有源電力濾波器；仿真

Abstract: Aiming to the problem of harmonics and low power factor caused by widely-used nonlinear load, and according to the mathematic mode of shunt three-phase active power filter, a shunt three-phase active power filter based on fuzzy-sliding mode variable structure control strategy which is by incorporating the sliding mode variable structure control and fuzzy control reaching-law is designed to suppress the harmonics and improve power factor. It can not only eliminate the chattering of sliding model variable structure control and make system have strong robustness against model uncertainties and external disturbance, but can also improve the character of reaching segment and tracking errors converge to a range of zero, This control method is verified by simulation, and the results of simulation show the control method is feasible, and have good dynamic and static performance in this system.
Keywords: mathematic mode;fuzzy-sliding mode variable structure control;shunt active power filter;simulation