【摘要】：隨著科學(xué)技術(shù)的不斷發(fā)展,各種電力電子裝置在生產(chǎn)生活中的普遍使用帶來了諧波污染問題，，對電網(wǎng)造成了嚴(yán)重影響，諧波的有效治理成為人們關(guān)注的話題。有源濾波器因?yàn)檠a(bǔ)償精度高、動態(tài)性能好、受電網(wǎng)系統(tǒng)參數(shù)變化影響小等優(yōu)勢，成為解決電網(wǎng)諧波和無功問題的重要工具。 有源電力濾波器的具體工作方法是在電網(wǎng)中發(fā)出與諧波電流相反的補(bǔ)償電流，實(shí)現(xiàn)電網(wǎng)電流趨于正弦波，其補(bǔ)償性能主要取決于在穩(wěn)態(tài)時的補(bǔ)償精度和動態(tài)調(diào)整過程當(dāng)中的響應(yīng)快慢。對于有源濾波器的研究主要包含下列工作： 第一在三相靜止a-b-c坐標(biāo)系下建立三相三線制并聯(lián)型APF的數(shù)學(xué)模型，經(jīng)過系列坐標(biāo)變換確立了其在d-q同步旋轉(zhuǎn)坐標(biāo)系下的數(shù)學(xué)模型，為電流環(huán)的設(shè)計(jì)和解耦控制提供依據(jù)。 第二對諧波的提取使用基于瞬時無功功率理論的i p iq法，采用三相軟件鎖相環(huán)得出電網(wǎng)相位角以便于諧波檢測和電流控制，對于SVPWM控制技術(shù)中存在的死區(qū)問題進(jìn)行了分析補(bǔ)償。 第三在控制策略上對PI控制器和重復(fù)控制器分別進(jìn)行了設(shè)計(jì)，考慮到傳統(tǒng)的PI控制只能對直流信號做到無靜差跟蹤，而對于由不同頻率交流信號疊加而成的APF諧波給定信號跟蹤效果較差。因此，本文懫用PI和重復(fù)控制相結(jié)合的復(fù)合控制方法,同時兼顧了重復(fù)控制的高控制精度和PI控制的優(yōu)良魯棒性。通過MATLAB仿真結(jié)果驗(yàn)證了本文中理論分析的正確性。 第四為滿足APF系統(tǒng)要求的多通道數(shù)據(jù)同步采集和實(shí)時補(bǔ)償?shù)囊�，在�?shí)驗(yàn)室現(xiàn)有的PWM整流器平臺上，拓展了兩片ADS8365設(shè)計(jì)了12通道高速同步采樣電路，對APF主電路中的電感、直流側(cè)電容進(jìn)行了設(shè)計(jì)。
[Abstract]:With the continuous development of science and technology, the widespread use of various power electronic devices in production and life has brought harmonic pollution, which has caused serious impact on the power grid. The effective treatment of harmonics has become a topic of concern. Active power filter (APF) has become an important tool to solve the problem of harmonic and reactive power because of its advantages of high compensation precision, good dynamic performance and little influence on the change of power system parameters. The specific working method of active power filter is to send out the compensation current opposite to the harmonic current in the power network, so that the current of the power network tends to sinusoidal wave. The compensation performance mainly depends on the compensation accuracy in the steady state and the response speed in the dynamic adjustment process. The research of active power filter mainly includes the following work: first, the mathematical model of three-phase three-wire shunt APF is established in three-phase static a-b-c coordinate system. The mathematical model in d-q synchronous rotating coordinate system is established through a series of coordinate transformation, which provides the basis for the design and decoupling control of the current loop. The second harmonic extraction uses the i p iq method based on instantaneous reactive power theory, using three-phase software phase-locked loop to obtain the power grid phase angle for harmonic detection and current control. The dead zone problem in SVPWM control technology is analyzed and compensated. Thirdly, Pi controller and repetitive controller are designed in control strategy, considering that traditional Pi control can only track DC signal without static error. However, the tracking effect of APF harmonic signal which is superimposed by different frequency AC signals is poor. Therefore, in this paper, the combination of Pi and repetitive control is used, and the high control precision of repetitive control and the excellent robustness of Pi control are considered at the same time. The correctness of the theoretical analysis is verified by MATLAB simulation. Fourth, in order to meet the requirements of multi-channel synchronous data acquisition and real-time compensation for APF system, two pieces of ADS8365 are extended to design 12-channel high-speed synchronous sampling circuit on the platform of PWM rectifier in laboratory. The inductance of APF main circuit is analyzed. The DC side capacitance is designed.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN713.8;TM761

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