本文選題：三相四線制 + 有源電力濾波器　； 參考：《河北工業(yè)大學》2014年碩士論文

【摘要】：現在我國主要采用三線四線制供電系統(tǒng)。當三相系統(tǒng)平衡時，流過零線的電流幾乎為零；當三相系統(tǒng)不平衡時，零線上的電流很大，甚至可能達到相電流的1.5倍，并且現在的民用負荷很多都是單相負載，會使電網中產生大量的零序諧波分量，在零線上疊加后會造成零線過流。零線電流過大會造成非常嚴重的后果，一方面零線導線的橫截面積與相線導線的橫截面積相差不大，一旦流過零線的電流過大，必然會導致零線嚴重發(fā)熱；另一方面零線上并沒有安裝自動保護裝置，，當流過零線的電流過大時，不能自動切除故障線路。 在三相四線制系統(tǒng)中，有源電力濾波器不僅需要補償相序電流還需要補償零序電流，避免因電流過大而造成火災的隱患。三相四線制有源濾波器主要是用來補償諧波電流，由兩部分構成：檢測環(huán)節(jié)和控制環(huán)節(jié)。檢測環(huán)節(jié)是指諧波電流的檢測，即將負載電流中的諧波電流檢測出來�？刂骗h(huán)節(jié)即諧波電流的補償，即將檢測出的諧波電流值按照一定算法變成控制脈沖信號，控制逆變器產生與檢測電流相對應的補償電流，輸送回電網的負載中。 本文主要重點研究三相四線制三電平有源濾波器的檢測部分。在matlab/simulink環(huán)境下搭建了三相四線制三電平有源濾波器的數學模型，對基于快速傅里葉變換（FFT）的諧波電流檢測和基于瞬時無功（ip-iq）的諧波電流檢測方法進行研究；引入了直流側電壓控制（PI）環(huán)節(jié)，控制采用SVPWM方法，實現整體功能的仿真；在CCS環(huán)境下進行有源濾波器的軟件設計；以DSP F28335為核心板，設計了有源濾波器的硬件電路。
[Abstract]:Now China mainly adopts three-wire and four-wire power supply system. When the three-phase system is balanced, the current passing through the zero line is almost zero; when the three-phase system is unbalanced, the current on the zero line is very large, possibly 1.5 times the current of the phase current, and many of the current civilian loads are single-phase loads. A large number of zero-sequence harmonic components will be generated in the power network, and the superposition of zero lines will result in zero-line overcurrent. On the one hand, the cross section area of zero wire is not different from that of phase line conductor, once the current passing through zero line is too large, it will inevitably lead to serious heating of zero line. On the other hand, no automatic protection device is installed on the zero line. When the current passing through the zero line is too large, the fault line cannot be automatically removed. In the three-phase four-wire system, the active power filter not only needs to compensate the phase-sequence current, but also needs to compensate the zero-sequence current, so as to avoid the hidden danger of fire caused by the excessive current. Three-phase four-wire active filter is mainly used to compensate harmonic current, which consists of two parts: detection and control. Detection is the detection of harmonic current, that is, the detection of harmonic current in the load current. The control link is the compensation of harmonic current, which changes the detected harmonic current into a control pulse signal according to a certain algorithm, and controls the inverter to generate the compensation current corresponding to the detection current, which is transported back to the load of the power network. This paper focuses on the three-phase four-wire three-level active filter detection. The mathematical model of three-phase four-wire three-level active filter is built in matlab/simulink environment. The methods of harmonic current detection based on fast Fourier transform (FFT) and harmonic current detection based on instantaneous reactive power (ip-iq) are studied. The DC side voltage control (Pi) link is introduced, SVPWM method is used to realize the simulation of the whole function, the active power filter software is designed in CCS environment, and the hardware circuit of the active power filter is designed with DSP F28335 as the core board.
【學位授予單位】：河北工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN713.8;TM761

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