發(fā)布時(shí)間：2018-06-01 21:44

  本文選題：諧波治理 + 有源濾波器��； 參考：《太原理工大學(xué)》2017年碩士論文

【摘要】：本課題是教育部博士點(diǎn)基金項(xiàng)目“電網(wǎng)諧波抑制技術(shù)的研究”(20101402120004)的后續(xù)研究?jī)?nèi)容,是為了解決電網(wǎng)中存在的諧波污染問(wèn)題。隨著非線性負(fù)載和整流裝置的大量使用,電網(wǎng)中諧波污染日益嚴(yán)重,降低了電能質(zhì)量,嚴(yán)重時(shí)可能引發(fā)故障事故,有源濾波器的設(shè)計(jì)為諧波治理提供了更好的途徑。與傳統(tǒng)的LC濾波器相比,有源濾波器作為新型的諧波補(bǔ)償裝置,檢測(cè)精度高、動(dòng)態(tài)特性好,補(bǔ)償效果明顯,現(xiàn)已成為解決諧波污染的主要設(shè)備。本文對(duì)電壓空間矢量控制的有源濾波器進(jìn)行了改進(jìn),設(shè)計(jì)出定頻滯環(huán)和空間矢量相結(jié)合的APF。整個(gè)系統(tǒng)從設(shè)計(jì)目的、理論研究、仿真驗(yàn)證和實(shí)驗(yàn)驗(yàn)證多方面論述,設(shè)計(jì)出了三相三線制結(jié)構(gòu)、以單位功率因數(shù)法為諧波檢測(cè)法和以定頻滯環(huán)空間矢量為控制方法的并聯(lián)型APF。具體研究?jī)?nèi)容如下:介紹了諧波產(chǎn)生原因和危害,從電能質(zhì)量標(biāo)準(zhǔn)說(shuō)明諧波治理的要求,對(duì)現(xiàn)階段APF的研究熱點(diǎn)和方向簡(jiǎn)要說(shuō)明。學(xué)習(xí)研究了APF的電路結(jié)構(gòu)和數(shù)學(xué)模型,對(duì)文中采用的諧波檢測(cè)法和電流跟蹤控制法進(jìn)行了詳細(xì)的推導(dǎo)解析。諧波檢測(cè)采用單位功率因數(shù)法,并引入鎖相環(huán),保證指令電流檢測(cè)的準(zhǔn)確性。合理調(diào)試PI調(diào)節(jié)器,使直流側(cè)電壓快速達(dá)到指定數(shù)值并穩(wěn)定運(yùn)行�？刂品椒ú捎枚l滯環(huán)空間矢量,不同于傳統(tǒng)的SVPWM,這種方法省去了大量的數(shù)學(xué)運(yùn)算,運(yùn)用邏輯判斷選擇最優(yōu)電壓矢量,節(jié)約了時(shí)間,定頻環(huán)節(jié)使得環(huán)寬滿(mǎn)足頻率需求變化。在MATLAB/Simulink中搭建仿真模型,根據(jù)電路要求,先進(jìn)行APF容量、交流側(cè)電感、直流側(cè)電容和電壓的參數(shù)計(jì)算,搭建各部分仿真模塊,整合仿真電路。在不同負(fù)載和電源情況下,對(duì)系統(tǒng)仿真,得出結(jié)果。結(jié)果表明,基于定頻滯環(huán)空間矢量的APF能滿(mǎn)足要求。學(xué)習(xí)完善實(shí)驗(yàn)軟硬件平臺(tái),編寫(xiě)硬件對(duì)應(yīng)的軟件程序。程序部分包括主程序和中斷服務(wù)程序,其中重點(diǎn)設(shè)計(jì)了控制方法部分,對(duì)具體流程詳細(xì)分析。同時(shí),對(duì)其它設(shè)計(jì)不足部分進(jìn)行了優(yōu)化。在所搭建的實(shí)驗(yàn)平臺(tái)進(jìn)行實(shí)驗(yàn),調(diào)試優(yōu)化軟硬件配置。分析所得實(shí)驗(yàn)數(shù)據(jù),觀察實(shí)驗(yàn)波形。結(jié)果表明,諧波電流畸變整體得到明顯抑制,對(duì)于低次諧波抑制效果明顯,驗(yàn)證了定頻滯環(huán)空間矢量APF的可行性和有效性。
[Abstract]:This subject is the follow-up research content of the doctoral project of Ministry of Education "Research on harmonic suppression technology in power grid", which is to solve the problem of harmonic pollution in power grid. With the large use of nonlinear loads and rectifier devices, harmonic pollution in the power network becomes more and more serious, which reduces the power quality and may lead to fault when serious. The design of active power filter provides a better way for harmonic control. Compared with the traditional LC filter, active power filter (APF), as a new harmonic compensation device, has high detection precision, good dynamic characteristics and obvious compensation effect. It has become the main equipment to solve harmonic pollution. In this paper, the active filter of voltage space vector control is improved, and an APF with constant frequency hysteresis loop and space vector is designed. The whole system is discussed from the aspects of design purpose, theoretical research, simulation and experimental verification. A three-phase three-wire structure is designed, which uses the unit power factor method as the harmonic detection method and the constant frequency hysteresis space vector as the control method. The main contents of this paper are as follows: the cause and harm of harmonic generation are introduced, the requirements of harmonic control are explained from the power quality standard, and the research focus and direction of APF are briefly explained. The circuit structure and mathematical model of APF are studied, and the harmonic detection method and current tracking control method used in this paper are deduced and analyzed in detail. The harmonic detection adopts the unit power factor method and the phase-locked loop is introduced to ensure the accuracy of the instruction current detection. Adjust Pi adjuster reasonably, make DC side voltage reach the specified value quickly and run stably. The control method uses the fixed frequency hysteresis space vector, which is different from the traditional SVPWM. This method saves a lot of mathematical operation, uses logic judgment to select the optimal voltage vector, saves the time, and makes the loop width meet the frequency demand change. The simulation model is built in MATLAB/Simulink. According to the circuit requirements, the parameters of APF capacity, AC side inductance, DC side capacitance and voltage are calculated first, and each part of simulation module is built, and the simulation circuit is integrated. Under different load and power supply, the system is simulated and the result is obtained. The results show that the APF based on the constant frequency hysteresis space vector can meet the requirements. Learn to improve the experimental software and hardware platform, write the corresponding hardware software program. The program includes main program and interrupt service program. At the same time, the other parts of the design are optimized. Experiments are carried out on the platform, and the hardware and software configuration is optimized. The experimental data were analyzed and the experimental waveforms were observed. The results show that the harmonic current distortion is obviously suppressed, and the effect on the low order harmonic is obvious. The feasibility and effectiveness of the fixed frequency hysteresis space vector APF are verified.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TM761

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