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Abstract (In Chinese)第5-7页
Abstract (In English)第7-8页
Chapter 1 Introduction第12-24页
    1.1 Background第12-14页
        1.1.1 Evolution of centralized generation第12页
        1.1.2 Basic characteristic of modern power generations第12-13页
        1.1.3 Basic characteristic of modern electricity network第13-14页
    1.2 Impact of distributed generations on grid frequency第14-16页
    1.3 Introductory to virtual inertia method第16-17页
    1.4 Literature review第17-21页
    1.5 Problem statement and research objectives第21页
        1.5.1 Key problem第21页
        1.5.2 Objectives第21页
    1.6 Thesis outline第21-24页
Chapter 2 Virtual Synchronous Generator第24-45页
    2.1 Introduction第24页
    2.2 VSG model description第24-29页
        2.2.1 Swing equation development第25-26页
        2.2.2 Droop characteristic of VSG第26-28页
        2.2.3 Voltage and current control loops第28页
        2.2.4 Overall model of VSG第28-29页
    2.3 Alternative forms of the swing equation第29-34页
        2.3.1 Order-level of the swing equation第30-31页
        2.3.2 Angle of the swing equation第31-32页
        2.3.3 Swing equation in SI-units第32-33页
        2.3.4 Swing equation in pu system第33-34页
    2.4 Comparison of droop method and VSG control第34-35页
        2.4.1 Comparing the steady-state behavior第34-35页
        2.4.2 Comparing the transient behavior第35页
    2.5 Simulation results第35-38页
        2.5.1 Scenario A: Frequency response to inertia change compared to droopcontrol method第36-37页
        2.5.2 Scenario B: Frequency response to active power droop change第37-38页
        2.5.3 Scenario C: Voltage response to reactive power droop change第38页
    2.6 Experimental results第38-43页
        2.6.1 Scenario A: Change in virtual inertia第39-40页
        2.6.2 Scenario B: Change in droop coefficient第40-42页
        2.6.3 Scenario C: Change in droop coefficient第42-43页
    2.7 Conclusions第43-45页
Chapter 3 Parallel Operation with Droop Control第45-62页
    3.1 Introduction第45-46页
    3.2 Analysis of the traditional droop control第46-61页
        3.2.1 Power decoupling based on the virtual power method第47页
        3.2.2 Power decoupling based on the virtual impedance第47-49页
        3.2.3 Proposed power decoupling method第49-53页
        3.2.4 Simulation results第53-61页
    3.3 Conclusions第61-62页
Chapter 4 Virtual Synchronous Generator in Parallel Operation第62-81页
    4.1 Introduction第62页
    4.2 operation of multi-paralleled VSGs第62-68页
        4.2.1 Power sharing第62-64页
        4.2.2 Analysis of multi-paralleled VSGs第64-66页
        4.2.3 Parameters design第66-68页
    4.3 simulation of multi-paralleled VSGs第68-71页
        4.3.1 Paralleled VSGs in island mode第69-71页
        4.3.2 Paralleled VSGs in grid-connected mode第71页
    4.4 Laboratory test of multi-paralleled VSGs第71-75页
    4.5 Reactive power sharing control scheme for multi-paralleled VSGs of differentcapacities第75-80页
        4.5.1 Description of the control scheme第76页
        4.5.2 Simulation results第76-80页
    4.6 Conclusions第80-81页
Chapter 5 Virtual Synchronous Generator with Modified Damping for ParallelOperation第81-99页
    5.1 Introduction第81页
    5.2 Damping effect of SG第81-82页
    5.3 Damping effect of VSG第82-84页
        5.3.1 Comparison of the form第83-84页
        5.3.2 Comparison of the form第84页
    5.4 Simplified VSG model第84-85页
        5.4.1 Transfer function model of simplified VSG第84-85页
        5.4.2 The circuit time constant and parameters design of simplified VSG第85页
    5.5 Proposed modified damping control scheme第85-87页
        5.5.1 Transfer function model of modified VSG第85-86页
        5.5.2 The time constant and parameters design of modified VSG第86-87页
    5.6. Simulation results第87-90页
        5.6.1 Comparison of the damping terms for VSG第87-88页
        5.6.2 Simulation results with simplified and modified damping terms第88-90页
    5.7 Analysis of the damping effect via experimental results第90-93页
        5.7.1 Results under grid-connected mode第90-91页
        5.7.2 Results under island mode第91-93页
    5.8 Experimental results of the simplified model第93-96页
        5.8.1 Scenario A第93-95页
        5.8.2 Scenario B第95-96页
    5.9 Experimental results of the modified model第96-97页
    5.10 Conclusions第97-99页
Chapter 6 Virtual Synchronous Generator in Parallel Operation withSynchronous Generator第99-113页
    6.1 Introduction第99页
    6.2 Third order VSG model description第99-101页
    6.3 Matching VSG and small SG dynamic Responses第101-103页
    6.4 SG model description第103-104页
    6.5 Simulation results第104-111页
        6.5.1 Equal sharing第104-110页
        6.5.2 Proportional sharing第110-111页
    6.6 Conclusions第111-113页
Chapter 7 Conclusions and Future Work第113-115页
    7.1 Conclusions第113-114页
    7.2 Future work第114-115页
References第115-131页
Appendices第131-134页
List of Publications第134-136页
Acknowledgements第136-137页
About the Author第137页

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