New concepts of dynamic voltage restoration for three-phase distribution systems

Author

Hongfa, Ding ; Jun, Gao ; Xianzhong, Duan

Author_Institution

Dept. of Electr. Power Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China

Volume

3

fYear

2000

fDate

2000

Firstpage

1427

Abstract

In three-phase AC power distribution systems, a dynamic voltage restorer (DVR) can be used to protect sensitive power customers from voltage disturbance. The outputs of the DVR relates to the disturbance level of supply voltages, the required restoration level of load voltages, and the limitation of energy exchange between the DVR and the transmission line. In this paper, the influences of these factors on the DVR outputs are analyzed in detail. A generalized DVR with multiple voltage source inverters that are connected to a common DC energy storage device and inserted into the different sensitive load branches respectively is presented. It has the potential to reduce the rating of DVR and its DC energy storage device, and the adverse effects of the DVR fault will be limited. The analysis results and the feasibility of the generalized DVR are verified by digital simulation

Keywords

DC-AC power convertors; energy storage; invertors; load (electric); power distribution faults; power distribution protection; power distribution reliability; power supply quality; power system analysis computing; DC energy storage device; digital simulation; dynamic voltage restoration concepts; energy exchange limitation; load voltages restoration; multiple voltage source inverters; power quality; sensitive load branches; supply voltage disturbance level; three-phase distribution system; transmission line; voltage disturbance protection; Active filters; Energy storage; Power generation; Power generation economics; Power quality; Power system dynamics; Power system protection; Power system restoration; Static VAr compensators; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Society Summer Meeting, 2000. IEEE

Conference_Location

Seattle, WA

Print_ISBN

0-7803-6420-1

Type

conf

DOI

10.1109/PESS.2000.868734

Filename

868734