Date of Award


Document Type

Masters Thesis

Degree Name


Organizational Unit

Daniel Felix Ritchie School of Engineering and Computer Science

First Advisor

David Wenzhong Gao, Ph.D.

Second Advisor

Andrew Detzel, Ph.D.

Third Advisor

Amin Khodaei

Fourth Advisor

Jun Zhang


Islanded microgrid, Maximum power point tracking, MPPT, Wind power


The control of frequency and power has always been a problem in the development of microgrid. This thesis focuses on the design and control of islanded microgrid; more specifically, it includes the design of the PV system and wind power system and the control of the frequency, voltage and the power output of the islanded microgrid.

Microgrid consists of the power sources, the control system, the distribution network and the load. More specifically, the power sources are composed of PV system and wind turbine system; the control system in the microgrid includes the droop controller, the Maximum Power Point Tracking (MPPT) controller and the pitch controller.

This thesis is dedicated to researching the control of the islanded microgrid. The frequency and the power output in islanded microgrid can be controlled by using different kinds of controllers. Since PV and wind turbine have different structures and characteristics, the control systems for the PV and wind turbine are different. It is also necessary to let the PV system and the wind power system communicate with each other in order to control the total power output to the load.

The design of the islanded microgrid includes the design of the PV system and design of the wind power system. This thesis includes five chapters. The first chapter includes the introduction to the microgrid, some background and motivation, literature review and the expected contributions. Then the thesis describes the PV system and the wind power system in chapter 2 and chapter 3 respectively. In both chapter 2 and chapter 3, the general structure of each system is shown first and then the details of the systems are discussed. The control system includes the controllers such as the MPPT controller, the pitch controller and the droop controller. A modified controller is introduced in chapter 2, which is the droop controller integrated with virtual inertia. A testing case comparing the frequency control with the modified droop controller and the droop controller is also shown in the same chapter.

The fourth chapter tests the control system of the microgrid by showing five testing cases and comparing two different experimental sets (load 1 and load 2); the last chapter concludes the thesis and discusses the future work of the design.

Publication Statement

Copyright is held by the author. User is responsible for all copyright compliance.

Rights Holder

Zeya Cai


Received from ProQuest

File Format




File Size

61 p.


Electrical Engineering