發(fā)布時間：2018-10-30 09:33

【摘要】：近年來，微電網(wǎng)、分布式發(fā)電和可再生能源發(fā)展迅速，同時，微電網(wǎng)與電網(wǎng)間交互作用的研究因為其應用的越來越廣泛而顯得愈加重要。對于此類研究，電力系統(tǒng)實時仿真是一個高效便捷的工具，但是傳統(tǒng)的純數(shù)字仿真系統(tǒng)或者純物理仿真系統(tǒng)已經(jīng)滿足不了對電力系統(tǒng)研究的要求，于是提出了結合兩者優(yōu)勢的數(shù)字物理綜合仿真系統(tǒng)技術。而電流源型數(shù)模綜合仿真系統(tǒng)適用于數(shù)字側是大阻抗的小系統(tǒng)而物理側是小阻抗的大系統(tǒng)這種情況，，具有更好的靈活性和更廣的應用范圍。 本文首先給出了電流源型數(shù)模綜合仿真系統(tǒng)的整體框架，其中物理側接口是重點研究對象，根據(jù)數(shù)模綜合仿真系統(tǒng)的研究特點，選擇三相整流和單相逆變作為物理側接口的主回路拓撲�？紤]數(shù)模綜合仿真系統(tǒng)的穩(wěn)定性問題，本文提出了基于理想變壓器模型的補償算法，并對該算法進行了仿真驗證。本文另一主要研究內(nèi)容是電流源型變換器的實現(xiàn)，對于整流器和逆變跟隨器，分別給出了三相整流和單相逆變的PWM信號產(chǎn)生方案和控制方案，并在MATLAB中搭建了仿真模型，進行了穩(wěn)態(tài)工況和動態(tài)工況的仿真實驗。最后，將整流器和逆變器進行了串聯(lián)仿真，并建立了一個微網(wǎng)小系統(tǒng)模型對數(shù)模接口進行了數(shù)模綜合仿真，與全數(shù)字仿真進行了對比。仿真結果表明整流器可以提供穩(wěn)定的直流電流源，逆變跟隨器可以實現(xiàn)大部分波形的跟蹤輸出，數(shù)模接口能夠滿足數(shù)模綜合仿真系統(tǒng)的要求，數(shù)模綜合仿真的結果和全數(shù)字仿真一致，該接口裝置可以實現(xiàn)電力系統(tǒng)實時仿真。
[Abstract]:In recent years, microgrid, distributed generation and renewable energy have developed rapidly. At the same time, the research of interaction between microgrid and grid becomes more and more important because of its more and more extensive application. For this kind of research, power system real-time simulation is an efficient and convenient tool, but the traditional pure digital simulation system or pure physical simulation system can not meet the requirements of power system research. Therefore, the digital physical comprehensive simulation system technology combining the advantages of both is put forward. The current source digital-analog integrated simulation system is suitable for the small system with large impedance on the digital side and the large system with small impedance on the physical side, which has better flexibility and wider application range. In this paper, the whole frame of the current source digital-analog integrated simulation system is presented, in which the physical side interface is the key research object, according to the characteristics of the digital-analog integrated simulation system, Three-phase rectifier and single-phase inverter are selected as the main circuit topology of physical side interface. Considering the stability of digital-analog integrated simulation system, a compensation algorithm based on ideal transformer model is proposed in this paper, and the algorithm is verified by simulation. For rectifier and inverter follower, the PWM signal generation scheme and control scheme of three-phase rectifier and single-phase inverter are given respectively, and the simulation model is built in MATLAB. The simulation experiments of steady and dynamic conditions are carried out. Finally, the rectifier and inverter are simulated in series, and a micro-grid small system model is established to simulate the digital-analog interface, which is compared with the full-digital simulation. The simulation results show that the rectifier can provide a stable DC current source, the inverter follower can realize the tracking output of most waveforms, and the digital-analog interface can meet the requirements of the digital-analog integrated simulation system. The results of digital and analog simulation are consistent with the full digital simulation. The interface device can realize real time simulation of power system.
【學位授予單位】：華中科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM743

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