本文選題：不同容量微源 + 改進下垂控制�。� 參考：《華北電力大學》2014年碩士論文

【摘要】：微網(wǎng)技術為分布式電源大規(guī)模并網(wǎng)應用提供了有效的技術途徑，但分布式電源常采用電力電子接口連接到微網(wǎng)，提高了分布式電源接口控制的靈活性并減少了系統(tǒng)的慣性，但是這將增加微網(wǎng)系統(tǒng)在維持能量平衡和頻率穩(wěn)定等方面的控制難度。如何實現(xiàn)分布式電源電力電子接口的穩(wěn)定控制是微網(wǎng)必須解決的問題，其中不同容量微源的穩(wěn)定并列運行是本文研究的重點。 為實現(xiàn)不同容量微源的穩(wěn)定并列運行，本文首先對現(xiàn)有的微源并列運行控制策略進行了分析總結，并搭建了微源并列運行的仿真模型，采用傳統(tǒng)的下垂控制方法觀察并列微源的運行原理；其次，文章借鑒不同容量同步發(fā)電機并列運行的控制思想對傳統(tǒng)的下垂控制方法進行改進，提出了電壓前饋電流補償?shù)母倪M下垂控制策略，實現(xiàn)了不同容量微源的有功功率、無功功率按比例自動分配，即微源的即插即用功能，解決不同容量發(fā)電單元分布式接入交流電網(wǎng)的技術難題，提高了微電網(wǎng)運行時的穩(wěn)定性和可靠性。最后，文章分別利用仿真軟件MATLAB/SIMULINK和高速處理芯片DSP TMS320F2812對提出的改進下垂控制方法進行仿真和實驗驗證。仿真和實驗結果表明了改進的下垂控制方法提高了控制系統(tǒng)的抗干擾能力和跟隨能力，有效地維持了逆變器輸出電壓的穩(wěn)定，，降低了電流諧波畸變率，實現(xiàn)了微源并網(wǎng)逆變器在靜態(tài)和暫態(tài)運行狀況下的穩(wěn)定運行。
[Abstract]:Microgrid technology provides an effective technical approach for large-scale grid-connected application of distributed power supply. However, power electronic interface is often used to connect to microgrid, which improves the flexibility of interface control and reduces the inertia of the system. However, this will make it more difficult to maintain the energy balance and frequency stability of the microgrid system. How to realize the stability control of power electronic interface of distributed power supply is a problem that must be solved in microgrid, and the stability and parallel operation of different capacity microsources is the focus of this paper. In order to realize the stable parallel operation of microsources with different capacities, this paper firstly analyzes and summarizes the existing microsource parallel operation control strategies, and builds the simulation model of microsource parallel operation. The traditional droop control method is used to observe the operation principle of parallel microsource. Secondly, the traditional droop control method is improved by referring to the control idea of parallel operation of synchronous generator with different capacities. An improved droop control strategy for voltage feedforward current compensation is proposed. The active power and reactive power of different capacity microsources are automatically distributed in proportion, that is, the plug and play function of microsource. To solve the technical problem of distributed access to AC grid with different capacity generating units, the stability and reliability of microgrid are improved. Finally, the improved droop control method is simulated and verified by simulation software MATLAB/SIMULINK and high-speed processing chip DSP TMS320F2812. The simulation and experimental results show that the improved droop control method improves the anti-interference ability and the following ability of the control system, effectively maintains the stability of the inverter output voltage, and reduces the harmonic distortion rate of the current. The stable operation of microsource grid-connected inverter under static and transient conditions is realized.
【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】：TM732

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