本文關(guān)鍵詞：有源電力濾波器滯環(huán)控制優(yōu)化設(shè)計(jì)　出處：《太原理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 諧波電流 有源濾波器 滯環(huán)控制 固定頻率 電流跟蹤控制 可變寬度滯環(huán)

【摘要】：隨著電力電子器件的不斷更新?lián)Q代,電力電子技術(shù)也在蓬勃發(fā)展,這些裝置在方便人們?nèi)粘Ｉ�、�?jié)約能源、提高生產(chǎn)效率等方面起著重要作用,但電力電子裝置大多采用非線性元件,所以由電流變換引起的諧波問題也同樣困擾著我們。大量諧波和無功電流注入電網(wǎng)會使得電網(wǎng)功率因數(shù)降低,電能使用效率變差,而且會導(dǎo)致用戶用電設(shè)備出現(xiàn)安全隱患,嚴(yán)重時甚至?xí)痣娏ο到y(tǒng)繼電保護(hù)裝置誤動作等問題。與早期的無源濾波相比,有源濾波器(APF)在補(bǔ)償諧波和無功電流和凈化電網(wǎng)方面有著十分顯著的效果,有源濾波器不但體積小而且性能可靠,因此有源濾波器成為近十年來有關(guān)電能質(zhì)量方面研究的熱點(diǎn)。 本文以三相三線制的并聯(lián)型APF系統(tǒng)為研究對象,介紹了APF的基本原理和拓?fù)浣Y(jié)構(gòu)。在諧波電流檢測方面采用了基于瞬時無功功率理論的ip-iq檢測方法。電流跟蹤控制方法則是在傳統(tǒng)滯環(huán)控制的基礎(chǔ)上,通過對滯環(huán)原理及模型的分析,對其進(jìn)行優(yōu)化設(shè)計(jì),使其原有的開關(guān)頻率不穩(wěn)的問題得以改善。該方法能有效協(xié)調(diào)系統(tǒng)參數(shù),在系統(tǒng)參數(shù)變化的情況下仍然能實(shí)現(xiàn)指令電流的精確跟蹤。 在MATLAB/SIMULINK仿真環(huán)境下搭建了APF系統(tǒng)的仿真模型。模型主要包括：主電路、諧波檢測及計(jì)算模塊、電流跟蹤控制模塊幾大部分。電流跟蹤控制模塊中的環(huán)寬計(jì)算模塊可以根據(jù)實(shí)時反饋的系統(tǒng)參數(shù)計(jì)算合理的環(huán)寬數(shù)值,并通過編寫S函數(shù)對其開關(guān)信號進(jìn)行有效控制。仿真結(jié)果表明，，傳統(tǒng)滯環(huán)控制和優(yōu)化后的控制方法都能精確跟蹤指令電流，達(dá)到預(yù)期補(bǔ)償效果。在開關(guān)頻率側(cè)，可以清楚地看到優(yōu)化后的方法能使得開關(guān)頻率相對穩(wěn)定，從而彌補(bǔ)了傳統(tǒng)滯環(huán)控制方法的不足。 完善了信號檢測調(diào)理電路，并在以TMS320F2812為核心的硬件平臺上對控制方法進(jìn)行了實(shí)驗(yàn)驗(yàn)證。編寫了包括主程序、捕獲中斷、A/D采樣濾波、諧波計(jì)算及補(bǔ)償?shù)裙δ苣K子程序。在硬件平臺的基礎(chǔ)上，在CCS3.3中對程序進(jìn)行調(diào)試，實(shí)驗(yàn)結(jié)果證明了本文優(yōu)化后滯環(huán)控制方法的可行性和正確性。
[Abstract]:With the continuous upgrading of power electronic devices, power electronics technology is also booming. These devices play an important role in facilitating people's daily life, saving energy, improving production efficiency and so on. However, most power electronic devices use nonlinear elements, so the harmonic problem caused by current transformation also puzzles us. A large number of harmonics and reactive currents injected into the power grid will reduce the power factor of the power grid. The efficiency of electric energy becomes worse, and it will lead to the safety hidden trouble of the consumer's power equipment, and even cause the maloperation of the relay protection device in the power system when it is serious, compared with the passive filter in the early period. Active power filter (APF) has remarkable effect in compensating harmonic and reactive current and purifying power network. Active filter is not only small in size but also reliable in performance. Therefore, active power filter (APF) has become a hot topic in the field of power quality in recent ten years. In this paper, the three-phase three-wire parallel APF system is taken as the research object. The basic principle and topological structure of APF are introduced. The ip-iq detection method based on instantaneous reactive power theory is adopted in harmonic current detection. The current tracking control method is based on the traditional hysteresis control. Go. Based on the analysis of hysteresis theory and model, the optimal design is carried out to improve the original switching frequency instability problem. This method can effectively coordinate the system parameters. The accurate tracking of instruction current can still be realized even when the system parameters change. The simulation model of APF system is built in MATLAB/SIMULINK environment. The model includes main circuit, harmonic detection and calculation module. The loop width calculation module in the current tracking control module can calculate the reasonable ring width value according to the real-time feedback system parameters. The simulation results show that the traditional hysteresis control method and the optimized control method can track the command current accurately and achieve the desired compensation effect. It can be clearly seen that the optimized method can make the switching frequency relatively stable, thus making up for the shortcomings of the traditional hysteresis control method. The signal detection and conditioning circuit is perfected, and the control method is verified on the hardware platform with TMS320F2812 as the core. The main program is written to capture the interrupt. A / D sampling filter, harmonic calculation and compensation module subroutine. On the basis of the hardware platform, the program is debugged in CCS3.3. The experimental results show the feasibility and correctness of the optimization of the rear hysteresis control method in this paper.
【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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