分布式發(fā)電（Distributed Generation,DG）的快速發(fā)展促進(jìn)了微網(wǎng)的發(fā)展。微網(wǎng)是一種為社區(qū)供電而設(shè)計(jì)的小型電力系統(tǒng),通過將分布式發(fā)電和負(fù)荷集成在一起,微網(wǎng)可最小化電能轉(zhuǎn)換的損失,提高系統(tǒng)的可靠性、效率、靈活性和冗余度。早期微網(wǎng)多采用交流供電模式,但隨著半導(dǎo)體工業(yè)的發(fā)展和直流負(fù)荷的日益增多,直流微網(wǎng)越來越受到研究者和工業(yè)界的關(guān)注。近年來,可充分利用交直流系統(tǒng)優(yōu)點(diǎn)的交直流混合微網(wǎng)發(fā)展迅速。其中交流和直流微網(wǎng)通過互聯(lián)變換器（Interlinking Converters,ILC）連接。ILC在調(diào)節(jié)直流電壓和交流頻率的同時,對雙向潮流進(jìn)行管理,是交直流微網(wǎng)中重要的系統(tǒng)組成部分。根據(jù)是否需要通信信道,ILC的控制方案大致可分為于通信的控制和自主控制兩類�；谕ㄐ诺姆桨干婕暗酵ㄟ^通信忘了交換信息,這會增加系統(tǒng)的總成本和及信息安全問題。自主控制僅需本地信息,不需要額外的通信傳遞,但需要考慮不同功率源協(xié)同問題。由于其成本低、可靠性高、即插即用等特點(diǎn),在微網(wǎng)中得到了廣泛的應(yīng)用。目前已有多種采用直流電網(wǎng)電壓和交流電網(wǎng)頻率來管理雙向電源的下垂控制方案。但這些方案大多涉及控制模式之間的切換,... 

【文章來源】：華北電力大學(xué)(北京)北京市 211工程院校 教育部直屬院校

【文章頁數(shù)】：117 頁

【學(xué)位級別】：博士

【文章目錄】：
摘要
Abstract
1 Introduction
    1.1 Background
    1.2 Hybrid microgrid components and topologies
        1.2.1 Conventional topology
        1.2.2 Multi-microgrid
        1.2.3 SST-based hybrid structure
    1.3 Significance of research
    1.4 Outline of thesis
2 Control strategies within hybrid grid
    2.1 Droop control within individual microgrids
        2.1.1 Conventional droop
        2.1.2 Angle droop
        2.1.3 Voltage current droop
        2.1.4 Alternate droop controls
    2.2 ILC Droop control schemes
        2.2.1 Normalised droop
        2.2.2 Modified ac-dc droop
        2.2.3 Voltage current droop
    2.3 Communication-based control
        2.3.1 Centralised control
        2.3.2 Distributed control
        2.3.3 Master slave control
    2.4 Concluding remarks
3 Generalized ILC droop scheme
    3.1 Introduction
        3.1.1 Shortcomings
        3.1.2 Features and contributions
    3.2 Droop-based ILC control
    3.3 Mathematical model of the system
    3.4 Simulation results
        3.4.1 Single hybrid microgrid
        3.4.2 Multi-hybrid microgrids
    3.5 Concluding remarks
4 Small signal stability analysis of hybrid grid
    4.1 Introduction
        4.1.1 Shortcomings
        4.1.2 Features and contributions
    4.2 Small signal model
        4.2.1 Interlinking converter
        4.2.2 Ac microgrid
        4.2.3 Dc microgrid
    4.3 Stability analysis
        4.3.1 Eigenvalue sensitivity to scaling factors
        4.3.2 Eigenvalue sensitivity to dc link capacitance and filter inductance
        4.3.3 Ac system SCR
    4.4 Simulation results
    4.5 Concluding remarks
5 Economical multi-mode ILC control scheme
    5.1 Introduction
    5.2 Interconnected grid topology and ILC modes
    5.3 Proposed ILC control scheme
        5.3.1 Primary control
        5.3.2 Secondary control
        5.3.3 Cost-based droop
        5.3.4 Switching between control modes
    5.4 Simulation results
        5.4.1 Primary control in a single hybrid microgrid
        5.4.2 Primary and secondary ILC control
        5.4.3 Cost-based ILC control
    5.5 Concluding remarks
6 Conclusions and future work
    6.1 Conclusions
    6.2 Future work
References
Papers published in the period of Ph.D. education
Research work in the period of Ph.D. education
Acknowledgements
Resume



本文編號：3205105