本文選題：有源電力濾波器 + LCL濾波器�。� 參考：《濟(jì)南大學(xué)》2014年碩士論文

【摘要】：近年來，電力電子技術(shù)得到了非常迅速的發(fā)展，與此同時(shí)相關(guān)的電力電子設(shè)備也逐漸的應(yīng)用于工業(yè)和人們的日常生活中，它在給人們帶來利益和方便的同時(shí)，也給電網(wǎng)帶來了越來越嚴(yán)重的諧波污染問題。有源電力濾波器(Active Power Filter, APF)是諧波補(bǔ)償中越來越被重視的一種電力設(shè)備，其相關(guān)控制策略是研究的核心問題。不過有源電力濾波器并未在國內(nèi)得到廣泛的應(yīng)用，仍存在著很多問題需要解決。因此，本文將針對(duì)APF的控制策略進(jìn)行深入的研究，研究的主要內(nèi)容包括： （1）提出一種可抑制電壓畸變影響的諧波電流檢測(cè)方法：改進(jìn)的單位功率因數(shù)UPF(unite power factor)諧波電流檢測(cè)方法。此方法無需進(jìn)行坐標(biāo)變換，因此算法簡單，并且當(dāng)負(fù)載發(fā)生變化時(shí)，也有很好的動(dòng)態(tài)響應(yīng)性能。為減少電壓畸變對(duì)系統(tǒng)的影響，本文將鎖相環(huán)引入到諧波電流檢測(cè)方法中，因此改進(jìn)了UPF方法。 （2）研究了空間矢量脈沖寬度調(diào)制SVPWM(Space Vector Pulse Width Modulation)方法。三相并聯(lián)型有源電力濾波器(SAPF)的參考指令是電流值而SVPWM參考指令是電壓值，因此本文提出了如何用SVPWM跟蹤控制SAPF補(bǔ)償電流參考值的方法，并且通過構(gòu)造Lyapunov函數(shù)，分析了SVPWM控制的SAPF的穩(wěn)定性。 （3）研究了基于LCL濾波器的三相APF的SVPWM控制方法，并且根據(jù)串聯(lián)LCL濾波器的SAPF的拓?fù)浣Y(jié)構(gòu)，找到了SVPWM的參考電壓和三相SAPF參考電流之間的關(guān)系。通過二者之間的關(guān)系式，將SVPWM控制算法應(yīng)用于串聯(lián)LCL濾波器的SAPF中。并且通過構(gòu)造Lyapunov函數(shù)，依據(jù)Lyapunov相關(guān)定理，分析了SVPWM控制的串聯(lián)LCL濾波器的SAPF的穩(wěn)定性。 （4）APF的非線性系統(tǒng)通過開關(guān)的控制可分為多個(gè)線性的動(dòng)態(tài)子系統(tǒng)，本文將切換控制與空間電壓矢量控制方法結(jié)合起來，，設(shè)計(jì)了一種簡單易行的算法。只需將三相電源電壓分為六個(gè)扇區(qū)，然后利用李雅普諾夫函數(shù)方法及全局漸進(jìn)二次穩(wěn)定理論，找出一個(gè)非常簡單的切換律，大大簡化了算法。該算法由于合理的運(yùn)用零矢量，因此明顯的降低了逆變器的開關(guān)損耗。 （5）在實(shí)際工程中，各個(gè)參數(shù)都有額定值的限制，因此均會(huì)受到飽和非線性的影響�；趯�(shí)際工程中出現(xiàn)的問題，本文提出了一種新的考慮飽和限幅的三相APF的控制方法。根據(jù)Lyapunov相關(guān)定理、凸集理論、凸組合條件將切換控制和SVPWM控制方法相結(jié)合，為考慮飽和限幅的三相APF找到了一種新的、簡單的穩(wěn)定性判據(jù)。該算法由于合理的應(yīng)用零矢量，因此明顯的降低了逆變器的開關(guān)損耗。 （6）設(shè)計(jì)了額定電流為10A的三相APF的各個(gè)參數(shù)。通過改進(jìn)的UPF諧波電流檢測(cè)方法檢測(cè)出諧波電流——指令電流，利用考慮飽和限幅的三相APF控制策略對(duì)APF進(jìn)行實(shí)時(shí)控制。仿真分析和實(shí)驗(yàn)結(jié)果證明了本文提出方法的可行性。
[Abstract]:In recent years, power electronics technology has been very rapid development, at the same time, the related power electronic equipment is also gradually used in industry and people's daily life, it brings benefits and convenience to people at the same time, It also brings more and more serious harmonic pollution to the power grid. Active Power filter (APF) is a kind of power equipment which is paid more and more attention to in harmonic compensation. However, APF has not been widely used in China, and there are still many problems to be solved. Therefore, this paper will carry on the thorough research to the APF control strategy, the main content of the research includes: 1) A harmonic current detection method which can suppress the influence of voltage distortion is proposed: an improved harmonic current detection method for unit power factor (UPF(unite power factor). This method does not need coordinate transformation, so the algorithm is simple and has good dynamic response performance when the load changes. In order to reduce the influence of voltage distortion on the system, the phase-locked loop (PLL) is introduced into the harmonic current detection method, so the UPF method is improved. The space vector pulse width modulation (SVPWM(Space Vector Pulse Width modulation) method is studied. The reference instruction of three-phase shunt active power filter (SAPFF) is the current value and the SVPWM reference instruction is the voltage value. In this paper, a method of using SVPWM to track and control the SAPF compensation current reference value is proposed, and the Lyapunov function is constructed. The stability of SAPF controlled by SVPWM is analyzed. The SVPWM control method of three-phase APF based on LCL filter is studied, and the relation between the reference voltage of SVPWM and the reference current of three-phase SAPF is found according to the topological structure of SAPF of series LCL filter. The SVPWM control algorithm is applied to the SAPF of series LCL filter by the relation between them. By constructing the Lyapunov function and according to the Lyapunov correlation theorem, the SAPF stability of the series LCL filter controlled by SVPWM is analyzed. The nonlinear system of APF can be divided into many linear dynamic subsystems by switching control. In this paper, a simple and easy algorithm is designed by combining switching control with space voltage vector control. The three-phase power supply voltage is divided into six sectors, and then a very simple switching law is found by using Lyapunov function method and global asymptotic quadratic stability theory, which greatly simplifies the algorithm. Due to the reasonable use of zero vectors, the switching loss of the inverter is obviously reduced. 5) in practical engineering, each parameter has the limit of rating, so it will be affected by saturation nonlinearity. Based on the problems in practical engineering, a new control method for three-phase APF with saturation limit is proposed. According to Lyapunov correlation theorem, convex set theory and convex combination condition, a new and simple stability criterion for three-phase APF with saturation limit is obtained by combining switching control with SVPWM control. Due to the reasonable application of zero vector, the switching loss of the inverter is obviously reduced. The parameters of three phase APF with rated current of 10 A are designed. The harmonic current-instruction current is detected by the improved UPF harmonic current detection method, and the three-phase APF control strategy considering saturation limit is used to control the APF in real time. Simulation analysis and experimental results show the feasibility of the proposed method.
【學(xué)位授予單位】：濟(jì)南大學(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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