本文選題：變流器　切入點：電流內(nèi)環(huán)　出處：《中國電機工程學報》2017年08期

【摘要】：首先介紹了變流器在??坐標系的離散化數(shù)學模型,在此基礎(chǔ)上,電流內(nèi)環(huán)采用無差拍控制(deadbeat control,DBC)方法跟蹤電流。在實際系統(tǒng)中,由于電感偏差的存在,將影響系統(tǒng)的穩(wěn)定性;同時,電流采樣誤差不可避免,將影響電流的控制精度。利用DBC模型在z域的傳遞函數(shù),分析了系統(tǒng)的穩(wěn)定性及動態(tài)性能。提出了一種改進DBC方法,既能提高系統(tǒng)對電感偏差程度適應(yīng)性和系統(tǒng)的穩(wěn)定裕度,又能較好地抑制電流采樣誤差以提高系統(tǒng)的干擾抑制能力。最后,搭建了三相變流器的實驗平臺,完成相關(guān)實驗,驗證了所提出控制方法的有效性。
[Abstract]:First of all, introduce the converter in? ? On the basis of discrete mathematical model of coordinate system, the method of deadbeat control control (DBC) is used to track the current in the inner loop of current. In practical system, the stability of the system will be affected by the existence of inductance deviation. The current sampling error is inevitable, which will affect the control accuracy of the current. Using the transfer function of DBC model in z domain, the stability and dynamic performance of the system are analyzed. An improved DBC method is proposed. It can not only improve the adaptability of the system to the inductance deviation and the stability margin of the system, but also suppress the current sampling error so as to improve the interference suppression ability of the system. Finally, the experimental platform of the three-phase converter is built, and the related experiments are completed. The effectiveness of the proposed control method is verified.
【作者單位】： 合肥工業(yè)大學電氣與自動化工程學院;
【分類號】：TM46

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本文編號：1660023