本文選題：動態(tài)電壓恢復(fù)器 + 電壓跌落��； 參考：《北京交通大學(xué)》2017年碩士論文

【摘要】：隨著工業(yè)的飛速發(fā)展.越來越多非線性、沖擊性負(fù)載被使用,由其引發(fā)電壓跌落、瞬時(shí)斷電等電能質(zhì)量問題已成為電力用戶共同關(guān)心的問題。動態(tài)電壓恢復(fù)器(Dynamic Voltage Restorer,DVR)裝置是一種能夠保護(hù)敏感負(fù)荷免受供電端電壓跌落、驟升等擾動的新型電力電子設(shè)備。串聯(lián)變壓器型動態(tài)電壓恢復(fù)器結(jié)構(gòu)簡單,效果明顯,廣泛應(yīng)用電能質(zhì)量控制領(lǐng)域。因此,本文針對串聯(lián)變壓器型動態(tài)電壓恢復(fù)器進(jìn)行了研究。本文首先對動態(tài)電壓恢復(fù)器的基本結(jié)構(gòu)和原理進(jìn)行了分析,并詳細(xì)介紹了有無串聯(lián)變壓器對整個系統(tǒng)的影響。由于采用了串聯(lián)變壓器,實(shí)際中會產(chǎn)生漏感,文中討論了漏感對濾波器設(shè)計(jì)和整個系統(tǒng)性能的影響。還確定了利用單相整流橋?yàn)槟孀兤魈峁┹斎胫绷麟妷?可以提供足夠的能量和持續(xù)時(shí)間�？焖�、準(zhǔn)確地檢測出系統(tǒng)電壓跌落的特征量是動態(tài)電壓恢復(fù)器運(yùn)行的前提條件。本文針對有效值檢測法和基于瞬時(shí)無功功率理論的dq0檢測法進(jìn)行了介紹與仿真,并設(shè)計(jì)了數(shù)字低通濾波器,在保持檢測精度的前提下提高了系統(tǒng)的響應(yīng)速度。通過仿真說明改進(jìn)有效值方法比傳統(tǒng)的有效值法具有更好的實(shí)時(shí)性。在動態(tài)電壓恢復(fù)器控制策略的研究方面,比較不同SPWM方式的優(yōu)缺點(diǎn),并推導(dǎo)采用單極性倍頻方式的電壓輸出公式,說明了諧波的分布情況。然后基于PID經(jīng)典控制算法對單電壓閉環(huán)的幾種方式和電壓電流雙閉環(huán)進(jìn)行了仿真,結(jié)合仿真結(jié)果分析了不同控制策略在穩(wěn)態(tài)性能和動態(tài)性能上的優(yōu)缺點(diǎn)以及不同適用場合。最后通過向量圖介紹了常用的三種補(bǔ)償方式,說明不同補(bǔ)償方式在經(jīng)濟(jì)成本方面的影響。最終本文設(shè)計(jì)了一臺基于TMS320F28335數(shù)字化控制的單相串聯(lián)變壓器動態(tài)電壓恢復(fù)器實(shí)驗(yàn)樣機(jī),進(jìn)行了主電路方案設(shè)計(jì)、控制實(shí)驗(yàn)板的搭建及程序設(shè)計(jì)。實(shí)驗(yàn)結(jié)果表明,本文所設(shè)計(jì)的動態(tài)電壓恢復(fù)器補(bǔ)償效果良好,可以滿足小功率場合電壓跌落補(bǔ)償?shù)囊?為進(jìn)一步研究奠定了的理論和實(shí)踐基礎(chǔ)。
[Abstract]:With the rapid development of industry, more and more nonlinear, the impact load is used, it causes the voltage drop, the instantaneous power quality problems have become the common concern of the power users. The dynamic voltage restorer (Dynamic Voltage Restorer, DVR) device is a kind of device to protect the sensitive load from the voltage drop of the power supply terminal. The series transformer type dynamic voltage restorer is simple, the effect is obvious, and the power quality control field is widely used. Therefore, the series transformer type dynamic voltage restorer is studied in this paper. Firstly, the basic structure and principle of the dynamic voltage restorer are analyzed, and the details of the dynamic voltage restorer are analyzed. The effect of a series transformer on the whole system is described in detail. Due to the use of a series transformer, the leakage inductance will be produced in practice. The effect of leakage inductance on the filter design and the performance of the whole system is discussed in this paper. The input DC voltage of the inverter is also determined by using a single-phase rectifier bridge to provide sufficient energy and duration. Fast and accurate detection of the characteristics of the voltage drop of the system is the precondition of the dynamic voltage restorer. In this paper, the effective value detection method and the dq0 detection method based on the instantaneous reactive power theory are introduced and simulated, and the digital low pass filter is designed to improve the response speed of the system on the premise of maintaining the detection precision. The simulation shows that the improved effective value method has better real-time performance than the traditional effective value method. In the study of the dynamic voltage restorer control strategy, the advantages and disadvantages of different SPWM modes are compared, and the voltage output formula using the unipolar frequency doubling mode is derived, and the distribution of harmonic waves is explained. Then based on the classical PID control calculation. Several modes of single voltage closed loop and double closed loop of voltage and current are simulated. The advantages and disadvantages of different control strategies in steady and dynamic performance are analyzed with simulation results. Finally, three kinds of common compensation methods are introduced by vector graph, and the economic cost of different compensation methods is explained. In this paper, a single phase series transformer dynamic voltage restorer experimental prototype based on TMS320F28335 digital control is designed, the main circuit scheme is designed, the construction of the experimental board and the program design are controlled. The experimental results show that the dynamic voltage restorer designed in this paper has good compensation effect and can satisfy the small power field. The requirement of voltage sag compensation has laid a theoretical and practical foundation for further research.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM714.2;TM761.12

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