發(fā)布時間：2018-05-15 19:38

  本文選題：配電臺區(qū) + 廣義無功補償　； 參考：《西安理工大學(xué)》2017年碩士論文

【摘要】：配電臺區(qū)系統(tǒng)直接面向終端用戶,是服務(wù)民生的重要基礎(chǔ)設(shè)施及未來清潔能源并網(wǎng)的重要節(jié)點,對承載和推進國家“互聯(lián)網(wǎng)+”智慧能源戰(zhàn)略具有重要意義。目前,由單相大容量負荷時空分布不合理及感性負荷增多帶來的三相負荷不平衡及無功不平衡問題是影響配電臺區(qū)運行的兩大主要問題。本課題針對這兩個問題,結(jié)合配電臺區(qū)系統(tǒng)采用三相四線制供電方式、接地與不接地負荷共存等特點,基于對稱分量法研究并實現(xiàn)以TSC (晶閘管投切電容器)支路為基本補償結(jié)構(gòu)的綜合補償無功及三相不平衡的配電臺區(qū)廣義無功補償技術(shù)。主要研究工作及結(jié)論如下。簡要介紹了配電臺區(qū)的組成、特點,分析了配電臺區(qū)無功及三相不平衡產(chǎn)生的原因及危害,結(jié)合配電臺區(qū)無功及三相不平衡治理現(xiàn)狀,提出利用廣義無功補償技術(shù)綜合治理配電臺區(qū)無功及三相負荷不平衡。分析單相TSC結(jié)構(gòu)及其補償無功的原理,以單相TSC為基本支路研究配電臺區(qū)廣義無功補償裝置主電路的結(jié)構(gòu),即采用△補償回路與Y補償回路結(jié)合的方式。在此基礎(chǔ)上,對TSC主電路進行研究及設(shè)計,選擇電容器組的配置方式為二進制分組方式,最佳投入閾值系數(shù)與切除閾值系數(shù)為0.6,在晶閘管兩端電壓過零時投切。研究常用的三種廣義無功補償算法,結(jié)合配電臺區(qū)廣義無功補償裝置主電路結(jié)構(gòu),選擇對稱分量法為基本算法,根據(jù)補償后系統(tǒng)只存在正序有功電流的特點,研究符合配電臺區(qū)系統(tǒng)特點及主電路結(jié)構(gòu)的配電臺區(qū)廣義無功動態(tài)補償模型,根據(jù)此模型,僅需測量系統(tǒng)三相有功功率及無功功率即可求出主電路中各補償電容的容量。并通過simulink仿真,使得廣義無功補償裝置主電路結(jié)構(gòu)及補償算法的正確性得以驗證。完成以dsPIC30F6014A與CPLD為核心的配電臺區(qū)廣義無功補償裝置控制部分硬件電路設(shè)計和軟件編程,實現(xiàn)配電臺區(qū)系統(tǒng)電參數(shù)的采集、補償裝置主電路的控制及保護功能。并結(jié)合工程化及實用化的思想,對配電臺區(qū)廣義無功補償裝置進行實驗驗證。實驗結(jié)果表明,本文所研究的配電臺區(qū)廣義無功補償技術(shù)能準確補償配電臺區(qū)系統(tǒng)的無功和三相不平衡。
[Abstract]:The radio distribution area system is directly oriented to the end users. It is an important infrastructure to serve the people's livelihood and an important node to connect clean energy in the future. It is of great significance to carry out and promote the intelligent energy strategy of the country's "Internet". At present, the unbalance of three-phase load and reactive power imbalance caused by the unreasonable space-time distribution of single-phase and large-capacity load and the increase of inductive load are the two main problems affecting the operation of distribution station area. In view of these two problems, this paper combines the characteristics of three-phase four-wire power supply system and coexistence of grounding and ungrounded load in the distribution station area system. Based on the symmetrical component method, the generalized reactive power compensation technique in the distribution station is studied and realized with TSC (thyristor switched capacitor) branch as the basic compensation structure and three-phase imbalance. The main research work and conclusions are as follows. This paper briefly introduces the composition and characteristics of the distribution station area, analyzes the causes and hazards of reactive power and three-phase imbalance in the distribution station area, and combines with the current situation of reactive power and three-phase imbalance control in the distribution station area. The generalized reactive power compensation technique is used to comprehensively control the imbalance of reactive power and three-phase load in the distribution station area. Based on the analysis of single-phase TSC structure and the principle of reactive power compensation, the structure of the main circuit of the generalized reactive power compensation device in the distribution station area is studied with the single-phase TSC as the basic branch, that is, the compensation loop is combined with the Y compensation circuit. On this basis, the main circuit of TSC is studied and designed. The configuration of capacitor bank is binary grouping mode, the optimal input threshold coefficient and excising threshold coefficient is 0.6, and the voltage at both ends of the thyristor is switched over 00:00. In this paper, three common generalized reactive power compensation algorithms are studied. Combined with the main circuit structure of the generalized reactive power compensation device in the distribution station area, the symmetric component method is chosen as the basic algorithm. According to the characteristic that only positive sequence active current exists in the compensated system, The generalized reactive power compensation model of the distribution station is studied, which accords with the characteristics of the radio distribution area system and the structure of the main circuit. According to this model, the capacity of the compensation capacitors in the main circuit can be obtained only by measuring the three-phase active power and reactive power of the system. Through simulink simulation, the correctness of the main circuit structure and compensation algorithm of the generalized reactive power compensation device is verified. The hardware circuit design and software programming of the control part of the generalized reactive power compensation device in the distribution station area based on dsPIC30F6014A and CPLD are completed. The collection of electrical parameters in the distribution station area and the control and protection function of the main circuit of the compensation device are realized. Combined with the idea of engineering and practicality, the generalized reactive power compensation device in the distribution station area is verified experimentally. The experimental results show that the generalized reactive power compensation technique studied in this paper can accurately compensate the reactive power and three-phase imbalance of the radio distribution area system.
【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM714.3

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