【摘要】：隨著我國電力系統(tǒng)的快速發(fā)展,現(xiàn)代電力網(wǎng)絡(luò)也朝著結(jié)構(gòu)日益復雜、負荷容量日益增大的方向發(fā)展,隨之帶來的電能質(zhì)量問題也越來越受到人們的關(guān)注。如何能夠更加高效、更加綜合解決電能質(zhì)量問題,已經(jīng)成為一個亟待解決的問題。統(tǒng)一電能質(zhì)量控制器(Unified Power Quality Controller, UPQC)作為功能強大的電能質(zhì)量綜合補償裝置,其并聯(lián)側(cè)具有STATCOM與APF的功能,串聯(lián)側(cè)具有DVR與DUPS的功能,既可以解耦獨立運行實現(xiàn)各自的功能,也可以作為一個整體實現(xiàn)統(tǒng)一的綜合功能,更好地解決復合電能質(zhì)量問題。 首先,對MMC-UPQC樣機主電路的拓撲結(jié)構(gòu)及其輸出電壓原理進行了分析。針對MMC-UPQC低壓樣機的實際需要,對主電路中關(guān)鍵元器件的參數(shù)(包括橋臂電抗、啟動充電電阻)進行了詳細的計算與研究。通過PSCAD仿真分析了MMC電平數(shù)與輸出電壓性能的關(guān)系,并據(jù)此確定了MMC電平數(shù)。 其次,進行了功率模塊主電路參數(shù)以及功率模塊控制系統(tǒng)兩個方面的設(shè)計,分別通過空載實驗、功率實驗以及集成實驗對設(shè)計的功率模塊進行測試,實驗結(jié)果驗證了功率模塊設(shè)計的正確性。 再次,對MMC-UPQC樣機的控制策略進行分析和研究,并以PSCAD/EMTDC為仿真平臺,對本文采用的控制策略進行仿真驗證,仿真結(jié)果驗證了控制策略的有效性。 最后,以Lab VIEW軟件工具為平臺,開發(fā)了適用于UPQC樣機的人機交互系統(tǒng)；并且詳細闡述MMC-UPQC樣機的控制系統(tǒng)設(shè)計,包括控制系統(tǒng)的總體框架、系統(tǒng)控制層設(shè)計、系統(tǒng)的通信方式以及控制策略的軟件實現(xiàn)。
[Abstract]:With the rapid development of power system in our country, modern power network is developing towards the direction of complex structure and increasing load capacity, which brings more and more attention to the problem of power quality. How to solve the power quality problem more efficiently and synthetically has become an urgent problem. The unified power quality controller (Unified Power Quality Controller, UPQC) is a powerful power quality compensation device. Its parallel side has the functions of STATCOM and APF, while the series side has the functions of DVR and DUPS. It can also be used as a whole to achieve a unified comprehensive function, better solve the composite power quality problem. Firstly, the topology of the main circuit of MMC-UPQC prototype and the principle of output voltage are analyzed. According to the actual needs of the MMC-UPQC low-voltage prototype, the parameters of the key components in the main circuit, including the reactance of the bridge arm and the starting charge resistance, are calculated and studied in detail. The relationship between MMC level number and output voltage performance is analyzed by PSCAD simulation, and the MMC level number is determined accordingly. Secondly, the main circuit parameters of the power module and the control system of the power module are designed. The power module is tested by the no-load experiment, the power experiment and the integrated experiment, respectively. The experimental results verify the correctness of the power module design. Thirdly, the control strategy of MMC-UPQC prototype is analyzed and studied, and the control strategy adopted in this paper is simulated based on PSCAD/EMTDC. The simulation results verify the effectiveness of the control strategy. Finally, the human-computer interaction system suitable for UPQC prototype is developed on the platform of Lab VIEW software tool, and the design of control system of MMC-UPQC prototype is described in detail, including the overall framework of control system and the design of system control layer. The communication mode of the system and the software implementation of the control strategy.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM761

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