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    Please use this identifier to cite or link to this item: http://ccur.lib.ccu.edu.tw/handle/A095B0000Q/422

    Title: 基於時變慣性響應與下垂控制之風場頻率調節研究;Study of Frequency Regulation by a Wind Farm Using Time-Varying Inertia and Droop Controls
    Authors: 楊武翰;YANG, WU-HAN
    Contributors: 電機工程研究所
    Keywords: 轉子速度控制;下垂控制;慣性控制;雙饋式感應發電機;槳距角控制;頻率調節;Rotor speed control;Droop control;Inertia control;Doubly fed induction generator;Pitch angle control;Frequency regulation
    Date: 2017
    Issue Date: 2019-07-17
    Publisher: 電機工程研究所
    Abstract: 隨著再生能源的興起,輸電系統操作者對於電力系統頻率穩定度變得更加的重視,尤其是在小型的電力系統中,傳統的風力發電系統因為與電力系統頻率之間呈現解偶關係使得無法提供電網適時調節系統頻率的能力,因此當傳統的火力發電機組漸漸的被風力發電機取代,風力發電系統對電網頻率調節的議題就變得越來越重要。 近年來很多的相關文獻都致力於研究有關風力發電機的慣性響應和下垂控制對於電力系統頻率調節的能力,為了實現此種調頻能力,我們必須在電力電子轉換器上加上慣性響應變數和下垂控制變數的雙迴路控制策略去決定輸入到轉子側變換器的實功參考值訊號,慣性響應運用在快速且暫態的頻率調節,而下垂控制則提供了較長且穩態的頻率調節,本篇論文基於目前文獻中所發展的風力機調頻控制模型提出結合了在不同風速和時間下的慣性響應變數和下垂控制變數之新的控制策略,此種新的控制策略整合了慣性響應控制、轉子速度控制和槳距角控制進而發展出一套完整的頻率調節控制機制,有別於以往的風力發電機頻率調節架構,新的控制策略在二匯流排測試電力系統和實際島嶼電力系統模擬中驗證,結果顯示此篇論文所提出新的控制方法對於電網頻率調節能力均有相當大的改善。
    With the rising of renewable energy, frequency stability problem has caused a particular concern for the transmission system operators (TSOs) especially in a small power system. Traditional wind generation system does not provide the appropriate capability of frequency regulation because of the decoupling from the power grid. Therefore, as conventional thermal generators are replaced partly by wind generators, the issue of wind generation system about frequency regulation has become more and more important. Several literatures have studied on the inertia control and droop control of wind generators to support frequency regulation capability in the power grid. To develop the functionality of frequency regulation capability, it is necessary to add control loops with inertia and droop variables to determine the power reference that is an input signal for rotor side converter (RSC) of DFIG. The inertia variable represents the transient frequency response and the droop variable affects the steady state frequency response. This study proposes a new control strategy for the inertia and droop variables to implement coordinate control in different wind speeds and time based on the current frequency regulation model in recent literatures. The new control strategy integrates the inertia control, rotor speed control and pitch angle control to accomplish the complete frequency regulation mechanism. Compared to the frequency regulation framework of the past, the new proposed method is verified in a two-bus test power system and an island power system. Consequently, it superiorly improves the performance of frequency regulation in the power grid.
    Appears in Collections:[電機工程研究所] 學位論文

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