A master thesis from Aalborg University
Voltage Unbalance Compensation in the Distribution Grid through Distributed Generation
Author(s)
Term
4. term
Education
Publication year
2015
Submitted on
2015-06-03
Pages
75 pages
Abstract
In the last years the integration of DG in the distribution network has significantly increased. With this increase in the injection of energy from decentralized generators the grid faces new challenges. Energy surplus coming from RES may produce a reverse power flow in the network altering the way conventional power systems operate. Due to this the presence of overvoltages and voltage unbalances will be more commonly seen in the grid. Classical compensation methods are typically used in the transmission level. However, this methods assume that the network has a high X/R ratio and SCR. In order to compensate for this problems in the distribution network a new approach has to be made considering the characteristic of the distribution network such as the low X/R ratio. In this thesis different methods for voltage unbalance compensation using the grid connected converter of a DER are analyzed. The operation of the methods is verified using Power Factory 15.
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