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Neutral point inverter controller using h infinity techniques

M. Alsharif, Ali Omar (2014) Neutral point inverter controller using h infinity techniques. Masters thesis, Universiti Tun Hussein Onn Malaysia.


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For applications in renewable energy and distributed generation, there is often a need to have a neutral line to provide a current path. This can be achieved by using a neutral-point circuit that consists of a conventional neutral leg and a split dc link. In this project, a H infinity (H∞) current controller is proposed to force the current flowing through the split dc link to be nearly zero so that the neutral-point current is stable, and then, a current control loop is added to eliminate the imbalance of the current so that the neutral-point current is balanced with respect to the dc terminals. This leads to very small deviations of the neutral point from the mid-point of the DC source, in spite of the possibly large neutral current. Simulation of inverter circuit, neutral-point and H infinity (H∞) has been performed using MATLAB/SIMULINK software. The simulation results confirm the validity of the proposed method.

Item Type: Thesis (Masters)
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ212-225 Control engineering systems. Automatic machinery (General)
Depositing User: Normajihan Abd. Rahman
Date Deposited: 06 Jul 2014 02:12
Last Modified: 06 Jul 2014 02:12
URI: http://eprints.uthm.edu.my/id/eprint/5481
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