并聯(lián)型有源濾波器電流控制新方法 II
摘 要 II
Abstract III
目 錄 IV
1緒論 1
1.1諧波抑制的意義 1
1.2諧波抑制的措施 3
1.3電能質(zhì)量 5
1.4本文主要研究?jī)?nèi)容 7
2常用濾波器的性能比較分析 8
2.1有源濾波器 9
2.1.1有源電力濾波器的發(fā)展現(xiàn)狀 10
2.1.2有源濾波器的工作原理 10
2.1.3衡量APF補(bǔ)償性能的指標(biāo) 11
2.1.4有源濾波器的主電路結(jié)構(gòu) 12
2.1.5有源濾波器的分類比較 12
2.2無源濾波器 18
3諧波電流檢測(cè)方法研究 20
3.1概述 20
3.2諧波檢測(cè)方法的發(fā)展趨勢(shì) 20
4控制策略的研究 26
4.1正弦脈寬調(diào)制技術(shù) 26
4.2滯環(huán)控制 31
4.3空間矢量PWM控制 32
4.4外層控制 32
5.1概述 34
5.2諧波檢測(cè)環(huán)節(jié)仿真實(shí)現(xiàn) 34
5.2.1三相/兩相變換SIMULINK下實(shí)現(xiàn) 35
5.2.2低通濾波器的仿真實(shí)現(xiàn) 35
5.2.2低通濾波器的仿真實(shí)現(xiàn) 35
5.2.3兩相/三相變換SIMULINK下實(shí)現(xiàn) 36
5.2.4諧波提取部分仿真實(shí)現(xiàn) 36
5.3諧波補(bǔ)償環(huán)節(jié)仿真實(shí)現(xiàn) 37
5.3.1主電路等效電路圖 37
5.3.2主電路仿真實(shí)現(xiàn) 38
5.3.3諧波補(bǔ)償實(shí)現(xiàn) 38
5.3.4負(fù)載側(cè)電壓和電流 40
結(jié) 論 42


并聯(lián)型有源濾波器電流控制新方法
摘 要
在現(xiàn)代電力系統(tǒng)中，隨著各種非線性電力電子裝置的大量應(yīng)用，電能質(zhì)量不斷受到關(guān)注。這些裝置向電力系統(tǒng)中注入諧波，使電網(wǎng)中的諧波污染日益嚴(yán)重，電能傳輸質(zhì)量惡化。因此，解決諧波問題，變得日益重要。傳統(tǒng)的諧波抑制方法是采用無源濾波器，但它存在許多缺陷，例如：濾波特性受系統(tǒng)參數(shù)的影響較大，只能消除特定的幾次諧波，可能與系統(tǒng)產(chǎn)生并聯(lián)諧振，諧波電流增加導(dǎo)致濾波器負(fù)荷過重等，使得諧波抑制效果受到影響。
針對(duì)并聯(lián)型有源濾波器提出了一種電流控制新方法，與傳統(tǒng)控制方式不同，該方式不需要檢測(cè)非線性負(fù)載中的諧波及無功電流。本文論述了并聯(lián)型有源濾波器電流控制的等效原理，MATLAB仿真結(jié)果表明，省略了檢測(cè)環(huán)節(jié)的該控制方法電路結(jié)構(gòu)簡(jiǎn)單，大大簡(jiǎn)化了算法的研究，能夠更加簡(jiǎn)單準(zhǔn)確地補(bǔ)償諧波電流，動(dòng)態(tài)響應(yīng)速度也很快。

關(guān)鍵詞：電力電子技術(shù)；并聯(lián)型有源濾波器；等效原理；電流控制；諧波及無功電流











Abstract
In modern power system, with a variety of non-linear power electronic devices of a large number of applications, power quality concern. These devices into the power system harmonics, so that the harmonic power grids have become more polluted and the quality of the deterioration of electrical energy transmission. Thus, the solution to harmonic problems, become increasingly important. Traditional methods of harmonic suppression is the use of passive filter, but it has many defects, such as: filtering properties of the impact of system parameters by a larger number of only the elimination of specific harmonics, may have a parallel resonance with the system, harmonic current increase in overloaded filters, such as lead, making the effect of harmonic suppression affected. In this paper, a new and efficient based on DSP (digital signal processor)-controlled single-phase active power filter.
A new equivalence principle of current control for shunt active power filters is introduced, which has no use for measurement of harmonic and reactive currents of nonlinear loads. This paper analyzes and demonstrates the principle. Simulation results by MATLAB are given to show that the equivalence principle without measurements has many merits such as simpler circuit configuration and algorithm, more exact compensation effectiveness and rapid dynamic response.
Key words: power electronic technique; shunt active power filters; equivalence principle; current control