本文選題：多脈波整流電路　切入點(diǎn)：自耦變壓器　出處：《蘭州交通大學(xué)》2017年碩士論文

【摘要】：由于電力半導(dǎo)體器件的非線性和時(shí)變性,整流系統(tǒng)向公用電網(wǎng)注入大量的電流諧波,不僅給電網(wǎng)帶來(lái)額外負(fù)擔(dān),而且給用戶(hù)帶來(lái)負(fù)面影響,并降低了設(shè)備的效率。因此,抑制網(wǎng)側(cè)諧波,實(shí)現(xiàn)節(jié)能減排,是一項(xiàng)重大的研究課題。由于MPR(Multipulse Rectifier,多脈波整流電路)具有成本低、結(jié)構(gòu)簡(jiǎn)單和可靠性高的優(yōu)點(diǎn),其在大功率整流領(lǐng)域應(yīng)用廣泛,是消除網(wǎng)側(cè)諧波成分的最有效方法之一。MPR能夠?qū)崿F(xiàn)諧波消除的核心器件是移相變壓器,相比于隔離變壓器,自耦變壓器可以有效地降低MPR的成本、體積、重量和損耗。在分析MPR原理的基礎(chǔ)上,設(shè)計(jì)了基于三角-多邊形自耦變壓器的24脈波整流電路,給出了三角-多邊形24脈波自耦變壓器的設(shè)計(jì)過(guò)程,改進(jìn)了該變壓器的結(jié)構(gòu)以適用于傳統(tǒng)的6脈波整流應(yīng)用設(shè)備,該變壓器的等效容量?jī)H為負(fù)載功率的17.4%。建模、仿真并分析了基于三角-多邊形自耦變壓器的24脈波整流系統(tǒng),結(jié)果表明,在負(fù)載變化時(shí),網(wǎng)側(cè)電流THD(Total Harmonic Distortion,諧波總畸變率)保持在6.1%以下,且輸入PF(Power Factor,功率因數(shù))接近于1,可應(yīng)用于要求網(wǎng)側(cè)電流THD小于8.0%的場(chǎng)合。為了使整流系統(tǒng)適用于更嚴(yán)苛的環(huán)境,設(shè)計(jì)了基于三角-多邊形自耦變壓器的36脈波整流電路,給出了三角-多邊形36脈波自耦變壓器的設(shè)計(jì)過(guò)程,該變壓器的等效容量?jī)H為負(fù)載功率的18.5%。建模、仿真并分析了基于三角-多邊形自耦變壓器的36脈波整流系統(tǒng),結(jié)果表明,在負(fù)載變化時(shí),網(wǎng)側(cè)電流THD保持在4.3%以下,且輸入PF接近于1,可應(yīng)用于要求網(wǎng)側(cè)電流THD小于5.0%的場(chǎng)合。因三角-多邊形24和36脈波自耦變壓器的結(jié)構(gòu)較為復(fù)雜、制造困難,提出了基于直流側(cè)有源諧波抑制技術(shù)的12脈波三角-多邊形自耦變壓整流電路,分析了基于直流側(cè)有源諧波抑制技術(shù)的諧波電流補(bǔ)償原理。建模、仿真并分析了該12脈波三角-多邊形自耦變壓整流電路,結(jié)果表明,在負(fù)載變化時(shí),網(wǎng)側(cè)電流THD保持在2.4%以下,輸入PF接近于1,且減小了電壓不平衡對(duì)線電流中諧波成分的影響,整流系統(tǒng)中電磁元件的總等效容量?jī)H占輸出功率的23%。因此,將MPR和直流側(cè)有源諧波抑制技術(shù)相結(jié)合,達(dá)到了更好的抑制諧波效果,減小了整流系統(tǒng)的成本和損耗以及電源電壓的不平衡對(duì)系統(tǒng)的影響,提高了系統(tǒng)的整流可靠性。
[Abstract]:Due to the nonlinear and time-varying characteristics of power semiconductor devices, the rectifier system injects a large amount of current harmonics into the public power network, which not only brings additional burden to the power network, but also brings negative effects to the users and reduces the efficiency of the equipment. It is an important research subject to suppress the harmonics on the network side and realize energy saving and emission reduction. Because of the advantages of low cost, simple structure and high reliability, the MPR(Multipulse Rectifier (multi-pulse rectifier) is widely used in the field of high-power rectifier. MPR is one of the most effective methods to eliminate harmonics on the grid side. The core device for harmonic elimination is phase shift transformer. Compared with isolation transformer, autotransformer can effectively reduce the cost and volume of MPR. Weight and loss. Based on the analysis of MPR principle, a 24-pulse rectifier circuit based on triangle-polygon autotransformer is designed, and the design process of triangle-polygon 24 pulse wave autotransformer is given. The structure of the transformer is improved to be suitable for the traditional 6-pulse rectifier application equipment. The equivalent capacity of the transformer is only 17.4 of the load power. The modeling, simulation and analysis of the 24-pulse rectifier system based on triangle-polygon autotransformer are presented. The results show that when the load changes, the THD(Total Harmonic distortion (total harmonic distortion rate) of the grid-side current remains below 6.1%. The input PF(Power factor (power factor) is close to 1, which can be applied to the situation where the THD of the network side current is less than 8.0%. In order to make the rectifier system suitable for more severe environment, a 36 pulse rectifier circuit based on triangle-polygon autotransformer is designed. The design process of the triangle-polygon 36 pulse wave autotransformer is presented. The equivalent capacity of the transformer is only 18.55.The modeling, simulation and analysis of the 36 pulse wave rectifier system based on the triangle polygon autotransformer are presented. The results show that, When the load changes, the current THD of the grid side is kept below 4.3%, and the input PF is close to 1, which can be applied to the situation where the THD of the network side current is less than 5.0%. Because of the complex structure of the triangle-polygon 24 and 36 pulse wave autotransformer, it is difficult to make. A 12-pulse triangular-polygonal self-coupled variable-voltage rectifier circuit based on DC side active harmonic suppression technique is proposed. The principle of harmonic current compensation based on DC side active harmonic suppression technique is analyzed. The simulation and analysis of the 12-pulse triangular-polygonal self-coupled variable-voltage rectifier circuit show that, when the load changes, the grid-side current THD is kept below 2.4%. The input PF is close to 1, and reduces the influence of voltage imbalance on harmonic component in line current. The total equivalent capacity of electromagnetic components in rectifier system is only 23% of output power. Therefore, MPR is combined with DC side active harmonic suppression technology. It achieves better harmonic suppression effect, reduces the cost and loss of the rectifier system and the influence of the unbalanced supply voltage on the system, and improves the reliability of the rectifier system.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TM461

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 蒼勝;李淵;楊威;楊世彥;;一種用于12脈波整流器諧波抑制的交錯(cuò)并聯(lián)變換器[J];電源學(xué)報(bào);2014年04期

2 王冬梅;鄒曉漁;戴錢(qián)坤;;DP型機(jī)載大功率18脈沖不對(duì)稱(chēng)自耦變壓整流器[J];電力電子技術(shù);2013年05期

3 孟凡剛;楊世彥;楊威;;六相三角形聯(lián)結(jié)自耦變壓器優(yōu)化設(shè)計(jì)[J];電力自動(dòng)化設(shè)備;2012年10期

4 佟為明;高蕾;王胤q，

本文編號(hào)：1672208