發(fā)布時間：2018-06-01 07:56

  本文選題：微網(wǎng) + 協(xié)調(diào)控制��； 參考：《華北電力大學(xué)》2017年碩士論文

【摘要】：微網(wǎng)為可再生能源及分布式能源規(guī)�；膽�(yīng)用提供了有力的技術(shù)支撐。然而,隨著微網(wǎng)中分布式電源種類的增加和數(shù)量的增多、微網(wǎng)負荷復(fù)雜性的增加,微網(wǎng)的運行控制顯得尤為重要。微網(wǎng)系統(tǒng)的協(xié)調(diào)控制為微網(wǎng)優(yōu)質(zhì)、可靠、安全、穩(wěn)定運行提供了技術(shù)保障。通過微網(wǎng)系統(tǒng)的協(xié)調(diào)控制手段,滿足微網(wǎng)內(nèi)部功率平衡的實時調(diào)控需求,充分發(fā)揮微網(wǎng)輸電的靈活性、保證微網(wǎng)運行的穩(wěn)定性。因此,對微網(wǎng)系統(tǒng)協(xié)調(diào)控制的研究具有非常重要的意義。本文圍繞微網(wǎng)的運行控制策略展開了相關(guān)研究。首先,本文總結(jié)分析了分布式電源并網(wǎng)逆變器的控制方法以及微網(wǎng)系統(tǒng)的協(xié)調(diào)控制策略。在此基礎(chǔ)之上,研究了H_∞魯棒控制,針對微網(wǎng)系統(tǒng)可能遭受到的一系列有功、無功功率等擾動,重點分析了H_∞魯棒控制中的靈敏度極小化問題,將靈敏度極小化問題引入到微網(wǎng)的協(xié)調(diào)控制當中,以此來滿足當微網(wǎng)系統(tǒng)受到小干擾后仍能保證各分布式電源協(xié)調(diào)運行的要求。然后,本文基于改進P-f/Q-dU/dt下垂控制方法,將微網(wǎng)系統(tǒng)的數(shù)學(xué)模型轉(zhuǎn)化為了H_∞魯棒控制的標準問題,由此提出了基于H_∞性能指標的微網(wǎng)協(xié)調(diào)控制方法,由此實現(xiàn)了在不同工況下的分布式電源功率合理精確分配,并滿足了微網(wǎng)系統(tǒng)對電壓和頻率等電能指標的高要求,使得微網(wǎng)系統(tǒng)動態(tài)性能、魯棒性能得以提高,總體運行性能達到更優(yōu)。本文選取部分輸出量作為反饋量,使得本文所提出的方法更易于工程實現(xiàn)。仿真結(jié)果表明,本文方法是正確的、有效的。
[Abstract]:Microgrid provides powerful technical support for the scale application of renewable energy and distributed energy. However, with the increase of the type and quantity of distributed power in microgrid, and the complexity of micro-grid load, the operation control of micro-grid becomes more and more important. The coordinated control of micro-grid system provides technical guarantee for high-quality, reliable, safe and stable operation of micro-grid. Through the coordinated control method of the microgrid system, the real-time control requirements of the power balance in the micro-grid can be satisfied, the flexibility of the micro-grid transmission can be brought into full play, and the stability of the micro-grid operation can be ensured. Therefore, it is of great significance to study the coordinated control of microgrid systems. This paper focuses on the operation control strategy of microgrid. Firstly, the control method of grid-connected inverter and the coordinated control strategy of micro-grid system are summarized and analyzed in this paper. On the basis of this, the H _ 鈭，

本文編號：1963447