<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>This paper presents a DC distribution system which has been supplied by external AC systems as well as local DG units in order to demonstrate an overall solution to power quality issue. In this paper, the proposed operation method is demonstrated by simulation of power transfer between external AC systems, DG units, AC and DC loads. The power flow control in DC distribution system has been achieved by network converters and DG converters. Also, the mathematical model of the network, DG and load converters are obtained by using the average technique, which allows converter systems accurately simulated and control strategies for this converters is achieved. A suitable control strategy for network converters has been proposed that involves DC voltage droop regulator and novel instantaneous power regulation scheme. Also, a novel control technique has been proposed for DG converters. In this paper, a novel control system based on stationary and synchronously rotating reference frame has been proposed for load converters for supplying AC loads connected to the DC bus by balanced voltages. The several case studies have been studied based on proposed methods. The simulation results show that DC distribution systems including DG units can improve the power quality at the point of common coupling (PCC) in the power distribution system or industrial power system.</p></abstract>

This paper presents a DC distribution system which has been supplied by external AC systems as well as local DG units in order to demonstrate an overall solution to power quality issue. In this paper, the proposed operation method is demonstrated by simulation of power transfer between external AC systems, DG units, AC and DC loads. The power flow control in DC distribution system has been achieved by network converters and DG converters. Also, the mathematical model of the network, DG and load converters are obtained by using the average technique, which allows converter systems accurately simulated and control strategies for this converters is achieved. A suitable control strategy for network converters has been proposed that involves DC voltage droop regulator and novel instantaneous power regulation scheme. Also, a novel control technique has been proposed for DG converters. In this paper, a novel control system based on stationary and synchronously rotating reference frame has been proposed for load converters for supplying AC loads connected to the DC bus by balanced voltages. The several case studies have been studied based on proposed methods. The simulation results show that DC distribution systems including DG units can improve the power quality at the point of common coupling (PCC) in the power distribution system or industrial power system.

Combined Operation of AC and DC Distribution System with Distributed Generation Units

Department of Electrical Engineering, Faculty of Engineering, University of Zanjan, PO Box 45195-313, Zanjan, Iran

Department of Electrical Engineering, Amirkabir University of Technology, Iran

Journal of Electrical Engineering

This paper presents a DC distribution system which has been supplied by external AC systems as well as local DG units in order to demonstrate an overall...

Combined Operation of AC and DC Distribution System with Distributed Generation Units

Published Online: Jun 07, 2011

Page range: 193 - 204

DOI: https://doi.org/10.2478/v10187-010-0028-1

Keywords
power quality, DC distribution system, distributed generation, microturbine unit, fuel cell unit

This content is open access.

Combined Operation of AC and DC Distribution System with Distributed Generation Units

Published Online: Jun 07, 2011

Page range: 193 - 204

DOI: https://doi.org/10.2478/v10187-010-0028-1

Keywordspower quality, DC distribution system, distributed generation, microturbine unit, fuel cell unit

This content is open access.

Keywords
power quality, DC distribution system, distributed generation, microturbine unit, fuel cell unit