發(fā)布時間：2018-05-14 02:14

  本文選題：分布式電源 + 微電網(wǎng)　； 參考：《上海應(yīng)用技術(shù)學(xué)院》2015年碩士論文

【摘要】：隨著分布式發(fā)電、微電網(wǎng)技術(shù)的不斷發(fā)展,微電網(wǎng)系統(tǒng)的結(jié)構(gòu)和電力負載將日益復(fù)雜,諧波、電壓波動與閃變等電能質(zhì)量問題的發(fā)生概率越來越高。微電網(wǎng)并網(wǎng)后將會嚴重影響配電網(wǎng)的電能環(huán)境。對此,在國家自然科學(xué)基金面上項目(項目編號：61374132)資助下,對該問題展開了研究,根據(jù)國際柔性輸電的發(fā)展規(guī)律,提出了一種基于有源電力濾波器(APF)和靜止型無功補償發(fā)生器(STATCOM)的電能質(zhì)量控制方法。完成的主要研究內(nèi)容和成果如下：1.研究了微電網(wǎng)中的常用分布式電源(DG)并網(wǎng)問題,并針對風(fēng)力發(fā)電、光伏發(fā)電、燃料電池等目前的主要的DG的原理進、特點進行分析,并搭建各DG的數(shù)學(xué)模型,研究其并網(wǎng)對配電網(wǎng)電能質(zhì)量的影響。2.基于瞬時無功理論分析了微電網(wǎng)諧波的快速檢測方法,在此基礎(chǔ)上針對目前諧波檢測算法通常存在的延時問題,研究了一種超前校正方法,經(jīng)仿真驗證本文的超前校正是正確、可行的。3.深入研究了微電網(wǎng)的無功補償原理,并推導(dǎo)了無功電流檢測算法的數(shù)學(xué)模型。4.考慮到諧波抑制及無功補差指令信號的跟蹤控制,對比分析了定頻滯環(huán)電流控制、三相SPWM調(diào)制、SVPWM調(diào)制三種常用的調(diào)制策略,并針對APF與STATCOM的控制特點,提出一種將電流滯環(huán)與空間矢量相結(jié)合的調(diào)制策略,不僅簡化了微電網(wǎng)電能質(zhì)量優(yōu)化設(shè)備的設(shè)計難度,而且有效地提高了微電網(wǎng)并網(wǎng)的電能質(zhì)量。5.通過PSCAD仿真與樣機實驗,仿真與實驗結(jié)果證明了微電網(wǎng)并網(wǎng)電能質(zhì)量控制理論的正確性與可行性。
[Abstract]:With the development of distributed generation and microgrid technology, the structure and load of microgrid system will become more and more complex, and the probability of power quality problems such as harmonic, voltage fluctuation and flicker will be higher and higher. The power environment of the distribution network will be seriously affected after the microgrid is connected to the grid. In this regard, funded by the National Natural Science Foundation of China (project No.: 61374132), the problem is studied, and according to the law of the development of international flexible transmission, A power quality control method based on active power filter (APF) and static reactive power compensation generator (STATCOM) is proposed. The main contents and results of the research are as follows: 1. In this paper, the problem of DGG grid-connected in microgrid is studied, and the principle and characteristics of DG, such as wind power generation, photovoltaic power generation and fuel cell, are analyzed, and the mathematical models of each DG are built. The influence of the power quality of distribution network is studied. 2. 2. Based on instantaneous reactive power theory, this paper analyzes the fast detection method of harmonic in microgrid, and then, aiming at the delay problem of current harmonic detection algorithm, a method of leading correction is studied, which is proved to be correct by simulation. Feasible. The principle of reactive power compensation in microgrid is deeply studied, and the mathematical model of reactive current detection algorithm is derived. Considering harmonic suppression and tracking control of reactive power compensation command signal, three common modulation strategies are compared and analyzed, such as constant frequency hysteresis current control, three-phase SPWM modulation and SVPWM modulation, and the control characteristics of APF and STATCOM are analyzed. A modulation strategy combining hysteresis of current with space vector is proposed, which not only simplifies the design difficulty of power quality optimization equipment in microgrid, but also effectively improves the power quality of microgrid. Through PSCAD simulation and prototype experiment, the simulation and experiment results prove the correctness and feasibility of the theory of power quality control.
【學(xué)位授予單位】：上海應(yīng)用技術(shù)學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM761

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本文編號：1885867