【摘要】：隨著電力電子技術(shù)的突飛猛進(jìn)和電氣裝置的廣泛應(yīng)用,諧波污染愈發(fā)惡化。電力諧波污染問題的解決方案目前主要有兩種。一種是“防病”法,通過優(yōu)化產(chǎn)品自身性能,降低產(chǎn)品自身的諧波發(fā)出。該方法僅對(duì)用電設(shè)備自身性能改進(jìn),減少了諧波源對(duì)電網(wǎng)污染。但供電系統(tǒng)龐大復(fù)雜,電網(wǎng)自身的電力電子器件開關(guān)工作狀態(tài)不可避免產(chǎn)生較大諧波污染,因此必須采用另一種方式即在電網(wǎng)安裝諧波抑制裝置。無源與有源電力濾波器是諧波抑制裝置的兩大類。無源電力濾波器雖然構(gòu)成簡(jiǎn)單、技術(shù)成熟、穩(wěn)定性強(qiáng)且運(yùn)行成本低但其附加損耗高,效率較低且動(dòng)態(tài)補(bǔ)償效果差所以逐漸被性能突出的有源濾波器替代。本研究在傳統(tǒng)有源濾波器設(shè)計(jì)的基礎(chǔ)上使用三電平雙Buck全橋逆變器作為主拓?fù)鋪韺?shí)現(xiàn)模塊化有源濾波器(Active Power Filter,APF)的功能。文中首先對(duì)比分析了多種有源濾波器的主拓?fù)浞桨?在總結(jié)了各種拓?fù)鋬?yōu)缺點(diǎn)的情況下論證了用三電平雙Buck全橋逆變器作為主要拓?fù)?解決了系統(tǒng)橋臂直通與功率開關(guān)管的體二極管反向恢復(fù)問題并且降低了開關(guān)損耗,優(yōu)化了系統(tǒng)效率。然后對(duì)系統(tǒng)的檢測(cè)與控制方案進(jìn)行了擇優(yōu)選擇;接著分別從硬件與軟件出發(fā)對(duì)本研究中所涉及的各功能單元展開詳細(xì)論述;最后,文中給出了本研究中原理樣機(jī)的主要測(cè)試結(jié)果,并提出了相應(yīng)的改進(jìn)設(shè)想方案。根據(jù)研究的實(shí)驗(yàn)測(cè)試結(jié)果證明:本課題所設(shè)計(jì)的有源濾波器的原理樣機(jī)不僅在輸出功率、各次諧波含量和THD等指標(biāo)上能夠滿足設(shè)計(jì)指標(biāo),而且具有良好的穩(wěn)定性和人機(jī)對(duì)話等功能。
[Abstract]:With the rapid development of power electronics technology and the wide application of electrical devices, harmonic pollution is getting worse and worse. There are two main solutions to the problem of power harmonic pollution. One is the "disease prevention" method, by optimizing the performance of the product itself, reduce the harmonic emission of the product itself. This method only improves the performance of electric equipment and reduces the pollution of harmonic source to power grid. However, the power supply system is huge and complex, and the switching state of power electronic devices will inevitably produce large harmonic pollution. Therefore, it is necessary to install harmonic suppression device in the power network in another way. Passive and active power filters are two kinds of harmonic suppression devices. Although the passive power filter is simple in structure, mature in technology, strong in stability and low in operation cost, it has high additional loss, low efficiency and poor dynamic compensation effect, so it is gradually replaced by active power filter with outstanding performance. In this paper, based on the traditional active power filter design, a three-level dual Buck full-bridge inverter is used as the main topology to realize the modular active power filter (Active Power Filter,APF) function. In this paper, the main topology schemes of various active power filters are compared and analyzed firstly, and the advantages and disadvantages of various topologies are summarized, and the use of three-level double Buck full-bridge inverter as the main topology is demonstrated. The reverse recovery of the body diode between the bridge arm and the power switch tube is solved, the switching loss is reduced, and the efficiency of the system is optimized. Then the detection and control scheme of the system is selected, and then the function units involved in the research are discussed in detail from the hardware and software. Finally, the main test results of the prototype are given, and the corresponding improvement scheme is put forward. According to the experimental results, it is proved that the prototype of active power filter designed in this paper can not only meet the design index in terms of output power, harmonic content of each order and THD, etc. And has good stability and man-machine dialogue and other functions.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN713.8;TM761;TM464
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本文編號(hào)：2455006