Simulation analysis on dynamic protection characteristics of low voltage circuit molded case breakers based on PSCAD/EMTDC

Author

Huang Jing ; Shen Bing

Author_Institution

Coll. of Electr. Eng., Naval Univ. of Eng., Wuhan, China

fYear

2014

fDate

28-30 July 2014

Firstpage

6293

Lastpage

6297

Abstract

In this paper, the electromagnetic characteristics of magnetic instantaneous acting trip in typical low-voltage molded case circuit breakers (MCCB) are analyzed using finite element analysis software ANSOFT and the electromagnetic torque on armature of magnetic trip which varied with the current and air gap are calculated and applied into motion equations of the trip. Based on the motion equations and Cassie arc model, a simulation model of MCCB is built using power system simulation software PSCAD/EMTDC to describe the dynamic behavior of the MCCB during short-circuit protection. The results of short-circuit interruption experiments verifies the accuracy of the model. It demonstrates that the simulation model has good prospect in optimizing the design and protection performance of MCCB.

Keywords

air gaps; circuit breakers; circuit-breaking arcs; finite element analysis; power system CAD; power system protection; short-circuit currents; switchgear protection; torque; Cassie arc model; MCCB; air gap; electromagnetic torque; finite element analysis software ANSOFT; low voltage molded case circuit breaker; magnetic trip armature; motion equation; power system simulation software PSCAD-EMTDC; short-circuit protection; Analytical models; Atmospheric modeling; Circuit breakers; Electromagnetics; Integrated circuit modeling; Mathematical model; Torque; MCCB; PSCAD/EMTDC; dynamic protection characteristics; power system; simulation;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference (CCC), 2014 33rd Chinese

Conference_Location

Nanjing

Type

conf

DOI

10.1109/ChiCC.2014.6896023

Filename

6896023