APF直流側(cè)電壓的控制與軟啟動研究
發(fā)布時間：2018-10-14 11:35
【摘要】：隨著社會的發(fā)展,各種電力電子設(shè)備廣泛地應(yīng)用于工業(yè)和日常生活中,給人們帶來便利的同時也引入了諧波污染等電能質(zhì)量問題。有源電力濾波器(Active Power Filter,APF)作為治理諧波的有效手段,能夠有效抑制諧波、補(bǔ)償無功。APF直流側(cè)電壓的穩(wěn)定直接影響到APF的輸出諧波能力和功率損耗,另外APF并網(wǎng)啟動時直流側(cè)電壓會產(chǎn)生較大沖擊,對直流側(cè)電容和IGBT產(chǎn)生損害,而此時傳統(tǒng)的PI控制等不再適用,故本文對APF直流側(cè)電壓穩(wěn)定控制和軟啟動進(jìn)行重點研究。本文主要工作如下:本文首先分析了直流側(cè)電壓基準(zhǔn)設(shè)定值與功率損耗、補(bǔ)償能力的關(guān)系,并針對電網(wǎng)電壓波動使直流側(cè)電壓基準(zhǔn)設(shè)定值不能同時兼顧APF的輸出諧波能力和功率損耗的問題,提出了直流側(cè)電壓基準(zhǔn)設(shè)定值的優(yōu)化選取方案,保證了在較低功率損耗的同時仍滿足補(bǔ)償精度要求。其次從能量守恒角度分析了直流側(cè)電壓波動的原因,闡明了APF在不同工作狀態(tài)時直流側(cè)電壓波動原理;建立了電壓電流雙環(huán)控制系統(tǒng)和直流側(cè)電壓的控制數(shù)學(xué)模型。在此基礎(chǔ)上,研究了直流側(cè)電壓的模糊控制方法,給出了模糊控制器設(shè)計方法和步驟,并針對目前已有的模糊+PI復(fù)合控制的缺點,提出了兩種改進(jìn)型的模糊+PI雙通控制方法,具有更好的穩(wěn)定性能,使直流側(cè)電壓在負(fù)載突變時波動更小。在理論研究基礎(chǔ)上,設(shè)計了滿足直流側(cè)電壓穩(wěn)定的相關(guān)器件參數(shù)。針對啟動時直流側(cè)電壓難以控制的問題,分析了軟啟動的必要性,研究了外加軟啟動電阻法;給出了軟啟動電阻的參數(shù)選擇方法和切除軟啟動電阻后的升壓控制策略,分析了利用橋臂自身組成Boost電路的軟啟動法。最后通過仿真和實驗對本文提出的直流側(cè)電壓控制方法和軟啟動方法進(jìn)行了驗證。結(jié)果表明本文所提改進(jìn)型模糊+PI控制具有很好的控制效果,有效抑制了負(fù)載突變時的直流側(cè)電壓波動,同時外加軟啟動電阻法實現(xiàn)了APF較小沖擊的并網(wǎng)目標(biāo)。
[Abstract]:With the development of society, all kinds of power electronic equipments are widely used in industry and daily life, which bring convenience to people and bring about power quality problems such as harmonic pollution. Active Power filter (Active Power Filter,APF), as an effective means to control harmonics, can effectively suppress harmonics and compensate reactive power. The stability of DC side voltage of APF has a direct impact on the output harmonic capacity and power loss of APF. In addition, the DC side voltage of APF will be greatly impacted when it is connected to the grid, which will damage the DC side capacitance and IGBT, but the traditional PI control is no longer applicable, so this paper focuses on the APF DC side voltage stability control and soft start. The main work of this paper is as follows: firstly, the relationship between DC voltage reference setting value and power loss, compensation ability is analyzed. Aiming at the problem that DC side voltage reference setting value can not take into account the output harmonic ability and power loss of APF due to the voltage fluctuation of the power network, the optimal selection scheme of DC side voltage reference setting value is put forward. At the same time, it can satisfy the requirement of compensation precision. Secondly, the reason of DC side voltage fluctuation is analyzed from the angle of energy conservation, the principle of DC side voltage fluctuation in different working state of APF is expounded, and the control mathematical model of voltage and current double loop control system and DC side voltage is established. On this basis, the fuzzy control method of DC side voltage is studied, the design method and steps of fuzzy controller are given, and the shortcomings of fuzzy PI compound control are pointed out. Two improved fuzzy PI double pass control methods are proposed, which have better stability and make DC side voltage fluctuate less when load changes. On the basis of theoretical research, the related device parameters are designed to meet DC side voltage stability. In view of the difficulty of controlling DC side voltage during startup, the necessity of soft start is analyzed, the method of soft starting resistance is studied, the parameter selection method of soft starting resistance and the boost control strategy after removing soft starting resistance are given. The soft start method of Boost circuit composed of the bridge arm itself is analyzed. Finally, the DC side voltage control method and soft start method proposed in this paper are verified by simulation and experiment. The results show that the improved fuzzy PI control has a good control effect and can effectively restrain the DC side voltage fluctuation when the load changes. Meanwhile, the soft start resistance method is applied to realize the grid-connected target with small impact of APF.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM761
本文編號：2270339
[Abstract]:With the development of society, all kinds of power electronic equipments are widely used in industry and daily life, which bring convenience to people and bring about power quality problems such as harmonic pollution. Active Power filter (Active Power Filter,APF), as an effective means to control harmonics, can effectively suppress harmonics and compensate reactive power. The stability of DC side voltage of APF has a direct impact on the output harmonic capacity and power loss of APF. In addition, the DC side voltage of APF will be greatly impacted when it is connected to the grid, which will damage the DC side capacitance and IGBT, but the traditional PI control is no longer applicable, so this paper focuses on the APF DC side voltage stability control and soft start. The main work of this paper is as follows: firstly, the relationship between DC voltage reference setting value and power loss, compensation ability is analyzed. Aiming at the problem that DC side voltage reference setting value can not take into account the output harmonic ability and power loss of APF due to the voltage fluctuation of the power network, the optimal selection scheme of DC side voltage reference setting value is put forward. At the same time, it can satisfy the requirement of compensation precision. Secondly, the reason of DC side voltage fluctuation is analyzed from the angle of energy conservation, the principle of DC side voltage fluctuation in different working state of APF is expounded, and the control mathematical model of voltage and current double loop control system and DC side voltage is established. On this basis, the fuzzy control method of DC side voltage is studied, the design method and steps of fuzzy controller are given, and the shortcomings of fuzzy PI compound control are pointed out. Two improved fuzzy PI double pass control methods are proposed, which have better stability and make DC side voltage fluctuate less when load changes. On the basis of theoretical research, the related device parameters are designed to meet DC side voltage stability. In view of the difficulty of controlling DC side voltage during startup, the necessity of soft start is analyzed, the method of soft starting resistance is studied, the parameter selection method of soft starting resistance and the boost control strategy after removing soft starting resistance are given. The soft start method of Boost circuit composed of the bridge arm itself is analyzed. Finally, the DC side voltage control method and soft start method proposed in this paper are verified by simulation and experiment. The results show that the improved fuzzy PI control has a good control effect and can effectively restrain the DC side voltage fluctuation when the load changes. Meanwhile, the soft start resistance method is applied to realize the grid-connected target with small impact of APF.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM761
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 張培遠(yuǎn);張浩;蔣偉;李虹;金明鳳;;重復(fù)—模糊PI復(fù)合控制策略在APF中的應(yīng)用[J];電氣應(yīng)用;2016年18期
2 張國榮;蔣繼勇;吳飛;;一種基于空間矢量的APF直流側(cè)電容電壓設(shè)計和優(yōu)化方法[J];電力系統(tǒng)保護(hù)與控制;2016年18期
3 劉建華;張亞健;朱蓓蓓;李佳;;分?jǐn)?shù)階PI~λ控制的雙閉環(huán)有源電力濾波器[J];電測與儀表;2016年09期
4 張鵬;肖本賢;;基于粒子群算法的APF直流側(cè)電壓控制[J];信息技術(shù);2016年01期
5 魏建軍;胡治國;艾永樂;;APF直流側(cè)電壓波動原因及穩(wěn)定控制研究[J];河南理工大學(xué)學(xué)報(自然科學(xué)版);2015年04期
6 楊劍鋒;王帥;謝延凱;;有源電力濾波器直流側(cè)電壓專家PI控制研究[J];電力電子技術(shù);2014年09期
7 孫曙光;蘇騰飛;杜太行;王秋萌;;有源電力濾波器直流母線電壓控制實驗研究[J];電測與儀表;2014年04期
8 戴珂;劉聰;李彥龍;張樹全;康勇;;并聯(lián)型APF對兩類非線性負(fù)載的諧波補(bǔ)償特性研究[J];電工技術(shù)學(xué)報;2013年09期
9 丁祖軍;劉保連;張宇林;;基于自抗擾控制技術(shù)的有源電力濾波器直流側(cè)電壓優(yōu)化控制[J];電網(wǎng)技術(shù);2013年07期
10 劉廣業(yè);王玉峰;;基于模糊控制自整定參數(shù)有源電力濾波器的研究[J];低壓電器;2013年08期
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