本文選題：自適應(yīng)諧波檢測算法 + 有源電力濾波器��； 參考：《中國礦業(yè)大學(xué)》2015年碩士論文

【摘要】：日益增多的電力電子器件和非線性負(fù)載使電力系統(tǒng)電能質(zhì)量受到諧波影響,諧波的存在會給發(fā)電、輸電、用電設(shè)備帶來問題,而人們對電能質(zhì)量的要求越來越高,因此治理諧波、提高電能質(zhì)量刻不容緩。有源電力濾波器作為一種動態(tài)的諧波治理設(shè)備成為大家的研究熱點,本文主要對主電路參數(shù)、自適應(yīng)諧波檢測算法、軟件鎖相環(huán)等方面對有源電力濾波器做了深入研究,并利用仿真和實驗對所采用的諧波檢測算法和控制方案進(jìn)行了驗證。首先對諧波的危害進(jìn)行了分析,查閱文獻(xiàn),對有源電力濾波器的發(fā)展以及工作原理進(jìn)行了介紹,并對近年來的主要研究方向進(jìn)行了總結(jié),對不同研究方向進(jìn)行了簡單介紹,針對研究熱點,確定了本文的研究方向;建立了有源電力濾波器的數(shù)學(xué)模型,并對不同坐標(biāo)系下的數(shù)學(xué)模型的應(yīng)用進(jìn)行了說明;通過理論分析和計算對有源電力濾波器的主電路元器件的參數(shù)進(jìn)行了探討,為之后的仿真和實驗平臺的搭建提供理論支撐。然后針對目前定步長自適應(yīng)諧波檢測算法無法兼顧檢測精度和快速性的缺點,根據(jù)數(shù)學(xué)理論對現(xiàn)有的自適應(yīng)算法進(jìn)行改進(jìn),利用帶有自適應(yīng)增益的動態(tài)步長進(jìn)行迭代計算,使得在保證檢測精度的基礎(chǔ)上還能維持較高的動態(tài)響應(yīng)能力,對改進(jìn)的自適應(yīng)諧波檢測算法進(jìn)行了仿真和DSP實驗,驗證了算法的有效性。針對平臺之前采用的基于過零點的鎖相方法的缺點,研究了軟件鎖相環(huán)的原理和實現(xiàn)方法,并對軟件鎖相在三相不平衡和電壓畸變情況下的性能進(jìn)行了分析,本文采用濾波器來對干擾進(jìn)行濾除,對改進(jìn)的軟件鎖相算法進(jìn)行了仿真和實驗研究;本文采用基于dq旋轉(zhuǎn)坐標(biāo)系的控制方案,對dq坐標(biāo)系下的控制進(jìn)行了詳細(xì)介紹,并對其穩(wěn)定性進(jìn)行分析;對常用的空間矢量調(diào)制算法的工程實現(xiàn)進(jìn)行了簡要介紹,并對控制系統(tǒng)的硬件和軟件進(jìn)行了設(shè)計。最后,針對本文采用的諧波檢測算法和控制方案,對有源電力濾波器系統(tǒng)整體進(jìn)行了仿真和部分實驗研究,驗證了本文采用算法的有效性。
[Abstract]:The power quality of power system is affected by harmonics due to the increasing number of power electronic devices and nonlinear loads. The existence of harmonics will bring problems to power generation, transmission and electrical equipment, and the demand for power quality is becoming higher and higher. Therefore, it is urgent to control harmonics and improve power quality. As a kind of dynamic harmonic control equipment, active power filter (APF) has become a hot research topic. In this paper, the main circuit parameters, adaptive harmonic detection algorithm, software phase-locked loop and other aspects of APF are studied deeply. The harmonic detection algorithm and control scheme are verified by simulation and experiment. Firstly, the harms of harmonics are analyzed, literature review, the development and working principle of APF are introduced, the main research directions in recent years are summarized, and the different research directions are briefly introduced. According to the research focus, the research direction of this paper is determined, the mathematical model of active power filter is established, and the application of mathematical model in different coordinate system is explained. Through theoretical analysis and calculation, the parameters of the main circuit components of active power filter are discussed, which provides theoretical support for the subsequent simulation and experimental platform. Then, aiming at the shortcoming that the current adaptive harmonic detection algorithm with constant step size can not take into account the accuracy and rapidity of detection, the existing adaptive algorithm is improved according to mathematical theory, and the iterative calculation of dynamic step size with adaptive gain is carried out. The improved adaptive harmonic detection algorithm is simulated and DSP experiments are carried out to verify the effectiveness of the algorithm. In view of the shortcomings of the zero-crossing point based phase-locking method adopted before the platform, the principle and implementation method of the software phase-locked loop are studied, and the performance of the software phase-locked loop in the case of three-phase imbalance and voltage distortion is analyzed. In this paper, the filter is used to filter the interference, the improved software phase-locked algorithm is simulated and experimentally studied, the control scheme based on the dq-rotating coordinate system is adopted, and the control under the dq coordinate system is introduced in detail. The stability of the control system is analyzed, the engineering implementation of the commonly used space vector modulation algorithm is briefly introduced, and the hardware and software of the control system are designed. Finally, aiming at the harmonic detection algorithm and control scheme adopted in this paper, the simulation and some experiments of the active power filter system are carried out to verify the effectiveness of the proposed algorithm.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN713.8;TM935

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本文編號：2041987