本文選題：有源電力濾波器 + 諧波檢測(cè)�。� 參考：《哈爾濱工業(yè)大學(xué)》2017年碩士論文

【摘要】：新型電力電子設(shè)備的大量應(yīng)用將使電能質(zhì)量面臨嚴(yán)峻的挑戰(zhàn)。其中,電流諧波問(wèn)題是影響電能質(zhì)量的普遍問(wèn)題。在治理電流諧波方面,有源電力濾波器(Active Power Filters,簡(jiǎn)稱(chēng)APF)具有重要的作用。APF可動(dòng)態(tài)補(bǔ)償諧波電流,并且應(yīng)用場(chǎng)合靈活。然而,APF在諸多方面仍然存在不足,比如在諧波的檢測(cè)和補(bǔ)償精度方面都有待提高。針對(duì)這些不足,本文將對(duì)APF控制系統(tǒng)展開(kāi)充分研究。為獲得較好的諧波估計(jì)性能,本文通過(guò)構(gòu)造負(fù)載電流的狀態(tài)方程,采用卡爾曼濾波器對(duì)諧波分量進(jìn)行在線(xiàn)估計(jì)。為優(yōu)化諧波檢測(cè)的動(dòng)態(tài)性能,本文提出了一種根據(jù)電流運(yùn)行狀態(tài),實(shí)時(shí)調(diào)整濾波器參數(shù)的方法,以提高諧波檢測(cè)的動(dòng)態(tài)響應(yīng)速度。同時(shí),針對(duì)傳統(tǒng)鎖相環(huán)角頻率估計(jì)的缺點(diǎn),本文設(shè)計(jì)了基于狀態(tài)觀測(cè)器的電壓角頻率估計(jì)器,為諧波檢測(cè)以及控制器提供較準(zhǔn)確的角頻率參數(shù)。并在此基礎(chǔ)上,通過(guò)Simulink仿真驗(yàn)證諧波和角頻率估計(jì)算法的性能。本文在深入分析APF控制系統(tǒng)的基礎(chǔ)上,建立APF系統(tǒng)數(shù)學(xué)模型,提出了一種基于輸出調(diào)節(jié)的電流跟蹤控制器,以實(shí)現(xiàn)電網(wǎng)電流對(duì)負(fù)載基波電流的跟蹤和諧波電流補(bǔ)償。同時(shí),為了提高系統(tǒng)的魯棒性,減少APF系統(tǒng)性能受參數(shù)攝動(dòng)的影響,在參數(shù)已知的系統(tǒng)誤差模型基礎(chǔ)上,建立含有未知參數(shù)的系統(tǒng)誤差模型,設(shè)計(jì)自適應(yīng)反步法電流控制器,并實(shí)時(shí)對(duì)參數(shù)進(jìn)行在線(xiàn)估計(jì)。仿真表明,本文設(shè)計(jì)的電流控制器在基波電流跟蹤方面具有較高的精度和較好的魯棒性。在理論和仿真分析的基礎(chǔ)上,本文搭建了APF硬件系統(tǒng)的半實(shí)物實(shí)驗(yàn)平臺(tái),對(duì)控制器的性能進(jìn)行實(shí)驗(yàn)分析。實(shí)驗(yàn)結(jié)果表明諧波和角頻率估計(jì),以及電流控制策略在硬件平臺(tái)上具有較好的性能。
[Abstract]:The application of new power electronic equipment will make the power quality face severe challenge. Among them, the current harmonic problem is a common problem affecting the power quality. Active Power filters (APFs) play an important role in controlling current harmonics. APF can dynamically compensate harmonic currents, and its applications are flexible. However, APF still has shortcomings in many aspects, such as harmonic detection and compensation accuracy need to be improved. In view of these shortcomings, this paper will fully study the APF control system. In order to obtain better harmonic estimation performance, this paper constructs the state equation of load current and uses Kalman filter to estimate harmonic components online. In order to optimize the dynamic performance of harmonic detection, a method of adjusting filter parameters in real time according to the current running state is proposed to improve the dynamic response speed of harmonic detection. At the same time, aiming at the shortcoming of traditional phase-locked loop (PLL) angular frequency estimation, a voltage angular frequency estimator based on state observer is designed in this paper, which can provide accurate angular frequency parameters for harmonic detection and controller. On this basis, the performance of harmonic and angular frequency estimation algorithm is verified by Simulink simulation. Based on the deep analysis of the APF control system, the mathematical model of the APF system is established, and a current tracking controller based on output regulation is proposed to track the load fundamental current and compensate the harmonic current. At the same time, in order to improve the robustness of the system and reduce the effect of parameter perturbation on the performance of APF system, based on the system error model with known parameters, the system error model with unknown parameters is established, and an adaptive backstepping current controller is designed. The parameters are estimated online in real time. Simulation results show that the proposed controller has high accuracy and robustness in fundamental current tracking. On the basis of theoretical and simulation analysis, the hardware-in-the-loop experimental platform of APF hardware system is built, and the performance of controller is analyzed experimentally. The experimental results show that the harmonic and angular frequency estimation and current control strategy have good performance on the hardware platform.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TM761

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