【摘要】：目前分布式光伏并網(wǎng)發(fā)電在這個(gè)領(lǐng)域不僅能夠有效提高同等規(guī)模的光伏電站發(fā)電量,同時(shí)也有效解決了電力在升壓及長(zhǎng)途運(yùn)輸中的損耗問(wèn)題,資源優(yōu)勢(shì)得天獨(dú)厚,應(yīng)用前景十分廣闊。 本文分析了分布式光伏產(chǎn)業(yè)發(fā)展的趨勢(shì)、國(guó)內(nèi)對(duì)于分布式光伏發(fā)電的政策法規(guī),介紹了光伏發(fā)電的基本發(fā)電原理和運(yùn)行特性,根據(jù)電力系統(tǒng)對(duì)光伏系統(tǒng)在線單元的各個(gè)指標(biāo)及其電能質(zhì)量的要求,通過(guò)計(jì)算機(jī)技術(shù)和現(xiàn)代控制技術(shù)設(shè)計(jì)了光伏并網(wǎng)的簡(jiǎn)單系統(tǒng),并分析了分布式光伏發(fā)電之后并網(wǎng)的遠(yuǎn)程監(jiān)測(cè)通信方式。在Matlab/Simulink的平臺(tái)依次分析并搭建模擬了光伏電池組件、光伏并網(wǎng)逆變器等光伏子系統(tǒng)并模擬了光伏并網(wǎng)整體的過(guò)程,最后通過(guò)與實(shí)際光伏電站的標(biāo)準(zhǔn)實(shí)測(cè)數(shù)據(jù)進(jìn)行了對(duì)比分析,證明了該模型的穩(wěn)定有效性。 研究了提高電能質(zhì)量從而降低光伏發(fā)電并網(wǎng)對(duì)電網(wǎng)影響的方法,在搭建的光伏并網(wǎng)仿真模型系統(tǒng)的基礎(chǔ)上單獨(dú)設(shè)計(jì)了LCL濾波器,在matlab中進(jìn)行了模擬濾波,檢測(cè)了濾波前及濾波后的諧波質(zhì)量及輸出的電流電壓波形,最后在LCL濾波之后,檢測(cè)出的諧波質(zhì)量滿足了國(guó)家電力部門的標(biāo)準(zhǔn),達(dá)到了改善電能質(zhì)量的預(yù)期效果。 最后結(jié)合現(xiàn)場(chǎng)工程情況以及目前的計(jì)算機(jī)技術(shù)和網(wǎng)絡(luò)通信技術(shù),通過(guò)電力系統(tǒng)、自動(dòng)控制、現(xiàn)代通信技術(shù)多個(gè)方面分析對(duì)比并優(yōu)化設(shè)計(jì)了適合分布式光伏發(fā)電的在線遠(yuǎn)程監(jiān)測(cè)方案,實(shí)現(xiàn)了電站的監(jiān)測(cè)網(wǎng)絡(luò)化、智能化,為光伏發(fā)電的推廣應(yīng)用創(chuàng)造有利條件。
[Abstract]:At present, distributed photovoltaic grid-connected generation not only can effectively improve the same scale of photovoltaic power generation in this field, but also effectively solve the problem of power loss in the boost up and long-distance transportation. The application prospect is very broad. This paper analyzes the development trend of distributed photovoltaic industry, domestic policies and regulations for distributed photovoltaic power generation, introduces the basic principles and operating characteristics of photovoltaic power generation. According to the requirements of the power system for the on-line unit of the photovoltaic system and its power quality, a simple grid-connected photovoltaic system is designed through computer technology and modern control technology. The communication mode of remote monitoring after distributed photovoltaic power generation is analyzed. In the Matlab/Simulink platform, the photovoltaic modules, photovoltaic grid-connected inverter and other photovoltaic subsystems are analyzed and simulated in turn, and the whole process of grid-connected photovoltaic system is simulated. Finally, the comparison and analysis are made with the standard measured data of the actual photovoltaic power station. The stability and validity of the model are proved. In this paper, the method of improving power quality and reducing the influence of photovoltaic grid connection on power grid is studied. LCL filter is designed separately on the basis of the photovoltaic grid-connected simulation model system, and simulated filter is carried out in matlab. The harmonic quality before and after filtering and the output current and voltage waveforms are detected. Finally, after LCL filtering, the detected harmonic quality meets the national power department standards and achieves the desired effect of improving the power quality. Finally, combined with the field engineering situation and the current computer technology and network communication technology, through the power system, automatic control, This paper analyzes and optimizes the on-line remote monitoring scheme suitable for distributed photovoltaic power generation in many aspects of modern communication technology, realizes the monitoring network and intelligence of power station, and creates favorable conditions for the popularization and application of photovoltaic power generation.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM615

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