發(fā)布時(shí)間：2018-02-27 05:05

  本文關(guān)鍵詞： 三電平APF 簡(jiǎn)化三電平SVPWM 雙區(qū)域電流預(yù)測(cè)控制　出處：《西南交通大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：伴隨著現(xiàn)代科學(xué)技術(shù)的發(fā)展和工業(yè)自動(dòng)化的普及,用電戶對(duì)電能質(zhì)量要求越來越高,提高電能質(zhì)量具有重要意義。危害電能質(zhì)量最為普遍的是諧波污染,有源電力濾波器(Active Power Filter,APF)就是解決這一問題的電能質(zhì)量控制裝置。電力系統(tǒng)的發(fā)展,增加了對(duì)經(jīng)濟(jì)、可靠的大容量APF的需要。 本文研究和設(shè)計(jì)了一個(gè)二極管箝位三電平并聯(lián)APF,重點(diǎn)闡述了該電能質(zhì)量控制裝置采用的雙區(qū)域電流預(yù)測(cè)控制方法,以及APF各個(gè)模塊功能和實(shí)現(xiàn)方法,在MATLAB/Simulink軟件上搭建了裝置模型并進(jìn)行功能仿真,通過對(duì)主電路參數(shù)、模擬諧波發(fā)生器的輔助電路及基于數(shù)字信號(hào)處理(DSP)芯片電路的設(shè)計(jì)搭建了實(shí)驗(yàn)平臺(tái),驗(yàn)證了設(shè)計(jì)的可行性。 在系統(tǒng)算法的研究方面,諧波電流的檢測(cè)采用基于瞬時(shí)無功功率理論的諧波電流檢測(cè)算法。針對(duì)有源電力逆變器外環(huán)直流側(cè)電壓波動(dòng),采用常規(guī)PI控制算法。內(nèi)環(huán)電流控制方法采用雙區(qū)域電流預(yù)測(cè)控制方法,首先通過分析傳統(tǒng)三電平空間矢量脈沖寬度調(diào)制;Space Vector Pulse Width Modulation,SVPWM)算法的基礎(chǔ)上,研究了一種簡(jiǎn)化的三電平SVPWM調(diào)制算法,該算法無需三角函數(shù)的計(jì)算,中點(diǎn)電位控制基本不增加算法的復(fù)雜度,大大減少DSP程序的運(yùn)行時(shí)間；然后為了提高APF的補(bǔ)償性能,在補(bǔ)償電流誤差較小(穩(wěn)態(tài))時(shí),采用內(nèi)環(huán)區(qū)域電流控制算法即簡(jiǎn)化三電平SVPWM調(diào)制算法,當(dāng)補(bǔ)償電流誤差較大(暫態(tài))時(shí),采用外環(huán)區(qū)域電流控制,最大限度地減小誤差；為了提高APF的實(shí)時(shí)性,最后在該算法中加入了簡(jiǎn)單預(yù)測(cè)控制�；陔p區(qū)域預(yù)測(cè)控制算法搭建了三電平APF仿真模型并仿真,證明了該算法原理是正確的。 硬件電路以數(shù)字信號(hào)控制芯片TMS320F2812為核心,外加驅(qū)動(dòng)電路、電流傳感器和電壓傳感器搭建而成,整個(gè)硬件電路采用模塊化方式實(shí)現(xiàn),致使整個(gè)電路調(diào)試方便、結(jié)構(gòu)設(shè)計(jì)簡(jiǎn)單及設(shè)計(jì)成本低。
[Abstract]:With the development of modern science and technology and the popularization of industrial automation, electric power users have higher and higher requirements for power quality. It is of great significance to improve power quality. Harmonic pollution is the most common hazard to power quality. Active Power filter (APF) is the power quality control device to solve this problem. The development of power system has increased the need for economical and reliable large capacity APF. In this paper, a diode clamped three-level parallel APF is studied and designed. The two-region current predictive control method used in the power quality control device is described, as well as the functions and implementation methods of each module of APF. The device model is built on the MATLAB/Simulink software and the functional simulation is carried out. The design of the main circuit parameters, the auxiliary circuit of the analog harmonic generator and the circuit based on the digital signal processing (DSP) chip are built up to verify the feasibility of the design. In the research of system algorithm, harmonic current detection algorithm based on instantaneous reactive power theory is adopted. The conventional Pi control algorithm and the double region current predictive control method are used in the inner loop current control. Firstly, based on the analysis of the traditional three-level space vector pulse width modulation (SVPWM) algorithm, the space Vector Pulse Width modulation (SVPWM) algorithm is introduced. In this paper, a simplified three-level SVPWM modulation algorithm is studied. The algorithm does not need trigonometric function calculation, and the neutral-point potential control does not increase the complexity of the algorithm, which greatly reduces the running time of the DSP program, and then in order to improve the compensation performance of APF, When the compensation current error is small (steady state), the inner loop current control algorithm is used to simplify the three-level SVPWM modulation algorithm. When the compensation current error is large (transient), the outer loop current control is used to minimize the error. In order to improve the real-time performance of APF, a simple predictive control is added to the algorithm. A three-level APF simulation model based on two-region predictive control algorithm is built and simulated, which proves that the principle of the algorithm is correct. The hardware circuit is composed of digital signal control chip TMS320F2812, external driving circuit, current sensor and voltage sensor. The whole hardware circuit is realized by modularization, which makes the whole circuit easy to debug. The structure design is simple and the design cost is low.
【學(xué)位授予單位】：西南交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM761;TN713.8

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