單相光伏并網(wǎng)逆變器共模漏電流和無功補(bǔ)償?shù)难芯?/H1>
發(fā)布時(shí)間：2018-02-15 03:18
本文關(guān)鍵詞： 光伏并網(wǎng)發(fā)電 漏電流 新型雙BUCK逆變器 無功補(bǔ)償 數(shù)字控制 出處：《揚(yáng)州大學(xué)》2014年碩士論文 論文類型：學(xué)位論文
【摘要】：逆變器是太陽(yáng)能光伏并網(wǎng)發(fā)電系統(tǒng)的重要組成部分,在太陽(yáng)能的發(fā)展和利用過程中占有核心地位。為確保光伏并網(wǎng)發(fā)電系統(tǒng)的可靠運(yùn)行,傳統(tǒng)的并網(wǎng)逆變器使用變壓器進(jìn)行電氣隔離,因此系統(tǒng)存在體積大、重量重、效率低、成本高等諸多缺點(diǎn),而非隔離型光伏并網(wǎng)逆變器均克服了已上缺點(diǎn),已成為當(dāng)前研究的熱點(diǎn)。 非隔離光伏并網(wǎng)逆變器由于變壓器的去除會(huì)在電路中產(chǎn)生共模干擾,并會(huì)使并網(wǎng)逆變系統(tǒng)和地之間形成共模漏電流而帶來安全隱患。因此,解決并網(wǎng)逆變器共模漏電流至關(guān)重要。論文首先以單相全橋非隔離光伏并網(wǎng)逆變器為例,對(duì)其建立共模漏電流模型,分析了該逆變器在不同的PWM調(diào)制方式下的共模特性,總結(jié)出了消除共模漏電流的方法。隨后,論文研究了四種改進(jìn)型非隔離光伏并網(wǎng)逆變器的共模特性,通過仿真比較了這四種逆變器的漏電流抑制效果,并總結(jié)出它們各自的優(yōu)缺點(diǎn)。 為了提高系統(tǒng)的效率和避免同一橋臂的功率管直通問題,本文重點(diǎn)研究了一種新型雙BUCK非隔離光伏并網(wǎng)逆變器拓?fù)?它具有輸入直流電壓利用率高,無橋臂功率管直通、共模漏電流小等優(yōu)點(diǎn)。論文對(duì)這種新型雙BUCK逆變器的工作原理進(jìn)行了分析,對(duì)主要參數(shù)進(jìn)行了設(shè)計(jì),通過對(duì)該逆變器的效率分析和計(jì)算,優(yōu)化選擇了功率開關(guān)器件。實(shí)驗(yàn)表明新型雙BUCK逆變器的漏電流抑制效果和效率均優(yōu)于目前使用較多的H6橋逆變器。 德國(guó)于2011年8月頒布了《分布式電源接入低壓配電網(wǎng)運(yùn)行管理規(guī)定》,即VDE-AR-N4105標(biāo)準(zhǔn)。該規(guī)定明確表明總視在功率大于4.6kVA的并網(wǎng)逆變器,均要求能夠?qū)﹄娋W(wǎng)實(shí)施無功補(bǔ)償。為了使逆變器做到低漏電流和高效率,大部分非隔離型并網(wǎng)逆變器均采用傳統(tǒng)的單極性調(diào)制,但在進(jìn)行無功功率補(bǔ)償時(shí),并網(wǎng)電流在電網(wǎng)電壓過零點(diǎn)發(fā)生畸變,因此在很大程度上加大了并網(wǎng)電流的總諧波畸變率,同時(shí)還會(huì)導(dǎo)致功率因數(shù)不能滿足±0.01的誤差范圍要求。本文以新型雙BUCK非隔離光伏并網(wǎng)逆變器為例,在實(shí)施無功補(bǔ)償時(shí)存在的并網(wǎng)電流畸變問題進(jìn)行了詳細(xì)的分析和研究,并提出了一種新的調(diào)制策略改變低頻管的控制方式,有效的解決了該問題。仿真和實(shí)驗(yàn)驗(yàn)證了本文所研究方法的正確
[Abstract]:Inverter is an important part of solar photovoltaic grid-connected power generation system and plays a core role in the development and utilization of solar energy. In order to ensure the reliable operation of photovoltaic grid-connected power generation system. Traditional grid-connected inverters use transformers for electrical isolation, so the system has many shortcomings, such as large volume, heavy weight, low efficiency, high cost and so on. It has become the hot spot of current research. The unisolated photovoltaic grid-connected inverter will cause common-mode interference in the circuit and cause the common mode leakage current between the grid-connected inverter system and the ground because of the removal of the transformer. Therefore, the common mode leakage current will be formed between the grid-connected inverter system and the ground. It is very important to solve the common mode leakage current of grid-connected inverter. Firstly, taking single-phase full-bridge non-isolated photovoltaic grid-connected inverter as an example, the common mode leakage current model is established, and the common-mode characteristics of the inverter under different PWM modulation modes are analyzed. The common mode characteristics of four improved non-isolated photovoltaic grid-connected inverters are studied, and the effects of the four kinds of inverters are compared by simulation. Their advantages and disadvantages are summarized. In order to improve the efficiency of the system and avoid the problem of passing through of power tube with the same bridge arm, a new type of double BUCK non-isolated photovoltaic grid-connected inverter is studied in this paper. It has high efficiency of input DC voltage, and no bridge arm power tube is straight through. In this paper, the working principle of this new double BUCK inverter is analyzed, the main parameters are designed, and the efficiency of the inverter is analyzed and calculated. The experimental results show that the leakage current suppression effect and efficiency of the new double BUCK inverter are better than that of the H6 bridge inverter which is widely used at present. In August 2011, Germany promulgated the "distributed Power supply access low Voltage Distribution Network Operation Management Regulation", or VDE-AR-N4105 Standard, which clearly indicates that the total apparent power is greater than 4.6 kVA for grid-connected inverters. In order to make the inverter achieve low leakage current and high efficiency, most non-isolated grid-connected inverters adopt traditional unipolar modulation, but in the reactive power compensation, The total harmonic distortion rate of grid-connected current is greatly increased due to the distortion of grid voltage over 00:00. At the same time, the power factor can not meet the 鹵0. 01 error range. In this paper, the problem of grid-connected current distortion existing in the implementation of reactive power compensation is analyzed and studied in detail, taking a new type of double BUCK non-isolated photovoltaic grid-connected inverter as an example. A new modulation strategy is proposed to change the control mode of the low frequency tube, which effectively solves the problem. The simulation and experiment verify the correctness of the method studied in this paper.
【學(xué)位授予單位】：揚(yáng)州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM464
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 李文婷;;離網(wǎng)光伏電站系統(tǒng)的優(yōu)化設(shè)計(jì)[J];陽(yáng)光能源;2010年08期
2 馬琳;孫凱;Remus Teodorescu;金新民;;高效率中點(diǎn)鉗位型光伏逆變器拓?fù)浔容^[J];電工技術(shù)學(xué)報(bào);2011年02期
3 胡雪峰;龔春英;;光伏并網(wǎng)逆變器的直接預(yù)測(cè)控制策略及其DSP實(shí)現(xiàn)[J];電工技術(shù)學(xué)報(bào);2011年S1期
4 劉君;劉敏;譚文艷;;國(guó)內(nèi)外光伏發(fā)電投資環(huán)境的分析與比較[J];電源世界;2012年01期
5 王小亮;王勉華;景凱凱;王瑞;;基于DSP的兩級(jí)式光伏并網(wǎng)逆變器的設(shè)計(jì)[J];電氣傳動(dòng);2013年03期
6 宋平崗;沈友朋;;無變壓器光伏并網(wǎng)逆變器抑制漏電流的控制策略[J];電氣傳動(dòng);2012年04期
7 錢金川;朱守敏;;全橋式逆變電源主電路設(shè)計(jì)[J];電工電氣;2010年04期
8 高文祥;王明渝;王立健;劉洋;;光伏微型逆變器研究綜述[J];電力系統(tǒng)保護(hù)與控制;2012年21期
9 王曉坤;李玉玲;;基于交錯(cuò)并聯(lián)boost電路的集中式光伏發(fā)電系統(tǒng)[J];機(jī)電工程;2013年08期
10 孟建輝;石新春;付超;寇薇;王偉;;新型高效率兩級(jí)式單相光伏并網(wǎng)逆變系統(tǒng)的研究與應(yīng)用[J];電力系統(tǒng)保護(hù)與控制;2013年20期
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本文編號(hào)：1512298
本文鏈接：http://sikaile.net/kejilunwen/dianlilw/1512298.html
本文關(guān)鍵詞： 光伏并網(wǎng)發(fā)電 漏電流 新型雙BUCK逆變器 無功補(bǔ)償 數(shù)字控制 出處：《揚(yáng)州大學(xué)》2014年碩士論文 論文類型：學(xué)位論文
【摘要】：逆變器是太陽(yáng)能光伏并網(wǎng)發(fā)電系統(tǒng)的重要組成部分,在太陽(yáng)能的發(fā)展和利用過程中占有核心地位。為確保光伏并網(wǎng)發(fā)電系統(tǒng)的可靠運(yùn)行,傳統(tǒng)的并網(wǎng)逆變器使用變壓器進(jìn)行電氣隔離,因此系統(tǒng)存在體積大、重量重、效率低、成本高等諸多缺點(diǎn),而非隔離型光伏并網(wǎng)逆變器均克服了已上缺點(diǎn),已成為當(dāng)前研究的熱點(diǎn)。 非隔離光伏并網(wǎng)逆變器由于變壓器的去除會(huì)在電路中產(chǎn)生共模干擾,并會(huì)使并網(wǎng)逆變系統(tǒng)和地之間形成共模漏電流而帶來安全隱患。因此,解決并網(wǎng)逆變器共模漏電流至關(guān)重要。論文首先以單相全橋非隔離光伏并網(wǎng)逆變器為例,對(duì)其建立共模漏電流模型,分析了該逆變器在不同的PWM調(diào)制方式下的共模特性,總結(jié)出了消除共模漏電流的方法。隨后,論文研究了四種改進(jìn)型非隔離光伏并網(wǎng)逆變器的共模特性,通過仿真比較了這四種逆變器的漏電流抑制效果,并總結(jié)出它們各自的優(yōu)缺點(diǎn)。 為了提高系統(tǒng)的效率和避免同一橋臂的功率管直通問題,本文重點(diǎn)研究了一種新型雙BUCK非隔離光伏并網(wǎng)逆變器拓?fù)?它具有輸入直流電壓利用率高,無橋臂功率管直通、共模漏電流小等優(yōu)點(diǎn)。論文對(duì)這種新型雙BUCK逆變器的工作原理進(jìn)行了分析,對(duì)主要參數(shù)進(jìn)行了設(shè)計(jì),通過對(duì)該逆變器的效率分析和計(jì)算,優(yōu)化選擇了功率開關(guān)器件。實(shí)驗(yàn)表明新型雙BUCK逆變器的漏電流抑制效果和效率均優(yōu)于目前使用較多的H6橋逆變器。 德國(guó)于2011年8月頒布了《分布式電源接入低壓配電網(wǎng)運(yùn)行管理規(guī)定》,即VDE-AR-N4105標(biāo)準(zhǔn)。該規(guī)定明確表明總視在功率大于4.6kVA的并網(wǎng)逆變器,均要求能夠?qū)﹄娋W(wǎng)實(shí)施無功補(bǔ)償。為了使逆變器做到低漏電流和高效率,大部分非隔離型并網(wǎng)逆變器均采用傳統(tǒng)的單極性調(diào)制,但在進(jìn)行無功功率補(bǔ)償時(shí),并網(wǎng)電流在電網(wǎng)電壓過零點(diǎn)發(fā)生畸變,因此在很大程度上加大了并網(wǎng)電流的總諧波畸變率,同時(shí)還會(huì)導(dǎo)致功率因數(shù)不能滿足±0.01的誤差范圍要求。本文以新型雙BUCK非隔離光伏并網(wǎng)逆變器為例,在實(shí)施無功補(bǔ)償時(shí)存在的并網(wǎng)電流畸變問題進(jìn)行了詳細(xì)的分析和研究,并提出了一種新的調(diào)制策略改變低頻管的控制方式,有效的解決了該問題。仿真和實(shí)驗(yàn)驗(yàn)證了本文所研究方法的正確
[Abstract]:Inverter is an important part of solar photovoltaic grid-connected power generation system and plays a core role in the development and utilization of solar energy. In order to ensure the reliable operation of photovoltaic grid-connected power generation system. Traditional grid-connected inverters use transformers for electrical isolation, so the system has many shortcomings, such as large volume, heavy weight, low efficiency, high cost and so on. It has become the hot spot of current research. The unisolated photovoltaic grid-connected inverter will cause common-mode interference in the circuit and cause the common mode leakage current between the grid-connected inverter system and the ground because of the removal of the transformer. Therefore, the common mode leakage current will be formed between the grid-connected inverter system and the ground. It is very important to solve the common mode leakage current of grid-connected inverter. Firstly, taking single-phase full-bridge non-isolated photovoltaic grid-connected inverter as an example, the common mode leakage current model is established, and the common-mode characteristics of the inverter under different PWM modulation modes are analyzed. The common mode characteristics of four improved non-isolated photovoltaic grid-connected inverters are studied, and the effects of the four kinds of inverters are compared by simulation. Their advantages and disadvantages are summarized. In order to improve the efficiency of the system and avoid the problem of passing through of power tube with the same bridge arm, a new type of double BUCK non-isolated photovoltaic grid-connected inverter is studied in this paper. It has high efficiency of input DC voltage, and no bridge arm power tube is straight through. In this paper, the working principle of this new double BUCK inverter is analyzed, the main parameters are designed, and the efficiency of the inverter is analyzed and calculated. The experimental results show that the leakage current suppression effect and efficiency of the new double BUCK inverter are better than that of the H6 bridge inverter which is widely used at present. In August 2011, Germany promulgated the "distributed Power supply access low Voltage Distribution Network Operation Management Regulation", or VDE-AR-N4105 Standard, which clearly indicates that the total apparent power is greater than 4.6 kVA for grid-connected inverters. In order to make the inverter achieve low leakage current and high efficiency, most non-isolated grid-connected inverters adopt traditional unipolar modulation, but in the reactive power compensation, The total harmonic distortion rate of grid-connected current is greatly increased due to the distortion of grid voltage over 00:00. At the same time, the power factor can not meet the 鹵0. 01 error range. In this paper, the problem of grid-connected current distortion existing in the implementation of reactive power compensation is analyzed and studied in detail, taking a new type of double BUCK non-isolated photovoltaic grid-connected inverter as an example. A new modulation strategy is proposed to change the control mode of the low frequency tube, which effectively solves the problem. The simulation and experiment verify the correctness of the method studied in this paper.
【學(xué)位授予單位】：揚(yáng)州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM464
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 李文婷;;離網(wǎng)光伏電站系統(tǒng)的優(yōu)化設(shè)計(jì)[J];陽(yáng)光能源;2010年08期
2 馬琳;孫凱;Remus Teodorescu;金新民;;高效率中點(diǎn)鉗位型光伏逆變器拓?fù)浔容^[J];電工技術(shù)學(xué)報(bào);2011年02期
3 胡雪峰;龔春英;;光伏并網(wǎng)逆變器的直接預(yù)測(cè)控制策略及其DSP實(shí)現(xiàn)[J];電工技術(shù)學(xué)報(bào);2011年S1期
4 劉君;劉敏;譚文艷;;國(guó)內(nèi)外光伏發(fā)電投資環(huán)境的分析與比較[J];電源世界;2012年01期
5 王小亮;王勉華;景凱凱;王瑞;;基于DSP的兩級(jí)式光伏并網(wǎng)逆變器的設(shè)計(jì)[J];電氣傳動(dòng);2013年03期
6 宋平崗;沈友朋;;無變壓器光伏并網(wǎng)逆變器抑制漏電流的控制策略[J];電氣傳動(dòng);2012年04期
7 錢金川;朱守敏;;全橋式逆變電源主電路設(shè)計(jì)[J];電工電氣;2010年04期
8 高文祥;王明渝;王立健;劉洋;;光伏微型逆變器研究綜述[J];電力系統(tǒng)保護(hù)與控制;2012年21期
9 王曉坤;李玉玲;;基于交錯(cuò)并聯(lián)boost電路的集中式光伏發(fā)電系統(tǒng)[J];機(jī)電工程;2013年08期
10 孟建輝;石新春;付超;寇薇;王偉;;新型高效率兩級(jí)式單相光伏并網(wǎng)逆變系統(tǒng)的研究與應(yīng)用[J];電力系統(tǒng)保護(hù)與控制;2013年20期
，本文編號(hào)：1512298
本文鏈接：http://sikaile.net/kejilunwen/dianlilw/1512298.html
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