本文選題：統(tǒng)一潮流控制器(UPFC)　切入點：分組多重化技術(shù)　出處：《中原工學院》2017年碩士論文　論文類型：學位論文

【摘要】：隨著全球能源互聯(lián)網(wǎng)的逐步推進以及市場經(jīng)濟的飛速發(fā)展,電力需求也日益增長,現(xiàn)有電力系統(tǒng)輸電能力不足的矛盾也日益凸顯,而建立新的傳輸線路受到土地、環(huán)境、成本等諸多客觀因素的限制而難以給予實施。因此,柔性交流輸電系統(tǒng)(FACTS)應運而生,并愈發(fā)受到人們關(guān)注。統(tǒng)一潮流控制器(UPFC)作為柔性交流輸電系統(tǒng)中最具代表性、功能最強大的串、并聯(lián)綜合補償裝置成為研究的熱點。本文在分析UPFC的拓撲結(jié)構(gòu)、工作原理和數(shù)學模型的基礎之上,分別對基于三電平換流裝置的UPFC(TNPC-UPFC)、基于MMC結(jié)構(gòu)的UPFC(MMC-UPFC)這兩種采用多電平技術(shù)的UPFC進行詳細的研究與分析。主要做的工作如下:1)介紹了電網(wǎng)中潮流控制的基本概念和基本方法,對UPFC的整體拓撲結(jié)構(gòu)進行詳細的闡述,介紹了UPFC的數(shù)學模型及控制策略,在給出UPFC的數(shù)學模型之前還簡要介紹了坐標變換理論和pq理論,該兩大理論是研究UPFC數(shù)學模型和控制策略的基礎,然后對電力PLL進行分析,并給出仿真模型,接著對UPFC串、并聯(lián)側(cè)建立動態(tài)數(shù)學模型,并給出相應的控制策略。2)對基于分組多重化技術(shù)的UPFC進行設計與詳細的分析和研究,分別對并聯(lián)側(cè)TNPC-STATCOM、串聯(lián)側(cè)TNPC-SSSC的控制策略進行詳細分析,并在Matlab/2016b仿真環(huán)境下建立仿真模型。接著研究分析了MMC-UPFC,還給出MMC-UPFC并聯(lián)側(cè)的仿真模型。并對仿真結(jié)果進行詳細分析,得出UPFC強大的有功和無功潮流控制能力。3)對MMC型換流器實驗樣機的設計和電路中相關(guān)元件參數(shù)選取進行了介紹。從MMC型換流器實驗樣機的子模塊設計入手,給出子模塊電容參數(shù)選取的計算公式,然后又對橋臂電抗器參數(shù)的選取對比公式,接著對MMC型換流器實驗樣機的控制系統(tǒng)設計做了整體上的闡述。
[Abstract]:With the gradual advancement of the global energy Internet and the rapid development of the market economy, the demand for electricity is also growing day by day, and the contradiction of the insufficient transmission capacity of the existing power system is becoming increasingly prominent, and the establishment of new transmission lines is subject to the land and environment. Because of the limitation of cost and many other objective factors, it is difficult to implement it. Therefore, facts (flexible AC Transmission system) emerges as the times require, and gets more and more attention. UPFC (Unified Power flow Controller) is the most representative of the flexible AC transmission system. The most powerful serial and parallel compensation devices have become the focus of research. This paper analyzes the topological structure, working principle and mathematical model of UPFC. Two kinds of UPFC which are based on three-level converter, TNPC-UPFCN and MMC structure, are studied and analyzed in detail. The main work is as follows: 1) the basic concept and method of power flow control in power network are introduced. The overall topological structure of UPFC is described in detail, and the mathematical model and control strategy of UPFC are introduced. Before the mathematical model of UPFC is given, the coordinate transformation theory and PQ theory are briefly introduced. These two theories are the basis of studying UPFC mathematical model and control strategy. Then the power PLL is analyzed, and the simulation model is given. Then, the dynamic mathematical model of UPFC serial and parallel side is established. The corresponding control strategy is given. (2) the design and research of UPFC based on grouping multiple technology are carried out, and the control strategies of TNPC-STATCOMand TNPC-SSSC on the parallel side are analyzed in detail, respectively. Then, the simulation model of MMC-UPFC is analyzed, and the simulation model of MMC-UPFC parallel side is given. The simulation results are analyzed in detail. It is concluded that UPFC has powerful active and reactive power flow control ability. (3) the design of the experimental prototype of MMC converter and the selection of related component parameters in the circuit are introduced. The sub-module design of the experimental prototype of MMC converter is introduced. The calculation formula of capacitance parameter selection of submodule is given, and then the comparison formula of bridge arm reactor parameter selection is given. Then, the control system design of MMC converter experimental prototype is described as a whole.
【學位授予單位】：中原工學院
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM761

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本文編號：1569779