The research on residual voltage of asynchronous motors and its impact on power restoration

Author

Xueshen, Cui ; Yulei, Yang ; Zhenhua, Zhou ; Haisen, Zhao

Author_Institution

Key Lab. of Power Syst. Protection & Dynamic Security Monitoring & Control, North China Electr. Power Univ., Beijing

fYear

2008

fDate

6-9 April 2008

Firstpage

2333

Lastpage

2338

Abstract

The residual voltage of asynchronous motors after AC dump(RVACD) could have result in inrush current and inrush torque when asynchronous motors were reclosed or reswitched on the alternate power source, which would have cause damage to motors or bring power source problems such as mal-operation of feeder protection and voltage sag, etc. In this paper we built the space vector based model of motors to research the RVACD so as to thoroughly analyze the varying laws of electrical qualities and magnetic field after dumping, deduce the analytical expression of residual voltage of one motor, and get the solution for the group of asynchronous motors. The inrush current and torque are presented for power source to be restored at different moment after dumping.

Keywords

induction motors; torque; asynchronous motors after AC dump; feeder protection; magnetic field; power restoration; residual voltage; voltage sag; AC motors; Equations; Magnetic analysis; Magnetic fields; Mathematical model; Mathematics; Power supplies; Surge protection; Torque; Voltage fluctuations; Asynchronous Motors; Power Restoration; Residual Voltage; Space Vector;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Utility Deregulation and Restructuring and Power Technologies, 2008. DRPT 2008. Third International Conference on

Conference_Location

Nanjuing

Print_ISBN

978-7-900714-13-8

Electronic_ISBN

978-7-900714-13-8

Type

conf

DOI

10.1109/DRPT.2008.4523801

Filename

4523801