Date of Award

1-1-2014

Document Type

Thesis

Degree Name

M.S.

Department

Electrical Engineering

First Advisor

Wenzhong Gao

Keywords

Control System, Least Square Method, Micro-grid, Newton-Raphson Algorithm, Parameter Identification

Abstract

Micro-grid provides an effective means of integrating distributed energy resource (DER) units into the power systems. A micro-grid is defined as an independent low- or medium-voltage distribution network comprising various DER units, power-electronic interfaces, controllable loads, and monitoring and protection devices. Following the development of the renewable energy, micro-grid has attracted much attention.

This thesis emphasizes on the parameter identification of the control system of the micro-grid. The control system plays an important role in the stable operation of the micro-grid. The micro-grid has two operation modes, which are grid-connected operation mode and islanded operation mode. The transition between two operation modes of the micro-grid often occurs according to the condition of the entire grid. In order to make this process smooth, the control system is crucial, and the parameters of the control system is critical to the disturbance suppression during the process of transition.

In the thesis, a method combining least square method with Newton-Raphson algorithm is proposed. In order to prove the utility of the method, the parameter identification of a typical control system and its several separated elements are simulated in MATLAB. This method can identify multiple parameters at the same time and have fast convergence.

Provenance

Recieved from ProQuest

Rights holder

Ning Gao

File size

69 p.

File format

application/pdf

Language

en

Discipline

Electrical engineering

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