本文關(guān)鍵詞： 光伏微逆變器 分布式發(fā)電系統(tǒng) 電力線載波通信 監(jiān)控系統(tǒng)　出處：《華南理工大學》2014年碩士論文　論文類型：學位論文

【摘要】：光伏微逆變器分布式發(fā)電系統(tǒng)中單臺微逆變器的工作異常可能對整個分布式發(fā)電系統(tǒng)產(chǎn)生不良影響，降低整體發(fā)電效率；并且當微逆變器發(fā)生故障時，希望能快速定位到該微逆變器，進行故障排除。因此，設(shè)計光伏微逆變器分布式發(fā)電監(jiān)控系統(tǒng)，監(jiān)控每臺光伏微逆變器的工作參數(shù)和整個光伏微逆變器分布式發(fā)電系統(tǒng)的整體運行參數(shù)，以便防止、查找和分析發(fā)電系統(tǒng)中的故障，，這對光伏并網(wǎng)發(fā)電的發(fā)展和電網(wǎng)電壓的穩(wěn)定具有重要意義。 本文分析了光伏微逆變器分布式發(fā)電監(jiān)控系統(tǒng)的國內(nèi)外發(fā)展現(xiàn)狀；研究了光伏微逆變器分布式發(fā)電系統(tǒng)的特點；提出了集電力線載波通信系統(tǒng)、能源管理單元中轉(zhuǎn)站和上位機監(jiān)控平臺一體的監(jiān)控系統(tǒng)方案。 研究了電力線載波通信方式的原理，分析比較了各種載波調(diào)制方式的優(yōu)缺點，選擇基于FSK+DSSS調(diào)制的電力線載波模塊，并針對此模塊設(shè)計了相應的耦合電路。 提出了能源管理單元EMU的設(shè)計方案，并對關(guān)鍵元件的參數(shù)進行設(shè)計和選型。通過能源管理單元進行分布式發(fā)電監(jiān)控系統(tǒng)的數(shù)據(jù)中轉(zhuǎn)，并實現(xiàn)光伏微逆變器分布式發(fā)電系統(tǒng)與上位機的數(shù)據(jù)傳輸。 開發(fā)了基于.NET平臺、C#語言的PC上位機監(jiān)控平臺，設(shè)計了良好的人機操作界面，方面用戶查看和操作；建立了全面的歷史數(shù)據(jù)庫系統(tǒng)，有利于系統(tǒng)故障的分析和科學研究，也為以后系統(tǒng)的改進和優(yōu)化提供了有價值的參考數(shù)據(jù)。 建立了光伏微逆變器分布式發(fā)電模擬系統(tǒng)、能源管理單元和PC上位機監(jiān)控系統(tǒng)的測試平臺。對電力線載波通信模塊和能源管理單元的信號傳輸可靠性和實時性、上位機功能進行了測試。試驗表明：研制的能源管理單元與電力線載波模塊傳輸質(zhì)量良好，上位機能實時監(jiān)控光伏微逆變器分布式發(fā)電系統(tǒng)的整體運行參數(shù)和每臺微逆變器的工作參數(shù)，并生成報表，建立歷史數(shù)據(jù)庫。
[Abstract]:The abnormal operation of single micro inverter in the distributed photovoltaic microinverter system may have a negative impact on the whole distributed generation system and reduce the overall generation efficiency. And when the micro-inverter fails, it is hoped that the micro-inverter can be quickly located and troubleshooting. Therefore, a distributed photovoltaic micro-inverter generation monitoring system is designed. Monitoring the operating parameters of each photovoltaic microinverter and the overall operating parameters of the whole distributed photovoltaic micro-inverter generation system, in order to prevent, find and analyze the fault in the generation system. This is of great significance to the development of photovoltaic grid-connected generation and the stability of grid voltage. This paper analyzes the status quo of the distributed generation monitoring system for photovoltaic microinverters at home and abroad. The characteristics of photovoltaic micro-inverter distributed generation system are studied. This paper presents a monitoring system which integrates the power line carrier communication system, the energy management unit transfer station and the host computer monitoring platform. This paper studies the principle of power line carrier communication, analyzes and compares the advantages and disadvantages of various carrier modulation methods, and selects the power line carrier module based on FSK DSSS modulation. The corresponding coupling circuit is designed for this module. The design scheme of energy management unit (EMU) is put forward, and the parameters of key components are designed and selected. The data transfer of distributed generation monitoring system is carried out through the energy management unit. The data transmission between the distributed generation system of photovoltaic microinverters and the upper computer is realized. The PC monitor and control platform based on. Net platform C # is developed, and a good man-machine interface is designed, which can be viewed and operated by users. A comprehensive historical database system is established, which is conducive to the analysis and scientific research of system failures, and provides valuable reference data for the improvement and optimization of the system in the future. The distributed generation simulation system of photovoltaic microinverters is established. The test platform of energy management unit and PC monitor system. The signal transmission reliability and real-time of power line carrier communication module and energy management unit. The function of the upper computer is tested. The experiment shows that the transmission quality of the energy management unit and the power line carrier module is good. The whole operating parameters of distributed photovoltaic microinverters and the working parameters of each microinverter are monitored by the upper function in real time. The report forms are generated and the historical database is established.
【學位授予單位】：華南理工大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM464;TP277

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