Arccircuit interaction including the effect of precurrent zero arc instability
Abstract
A computer arc model is developed which is capable of predicting the point of arc instability and simulate the subsequent current chop. It can also determine the level of current chopped and the response of the system to the phenomenon. The model is inserted in a computer algorithm which uses the conductance of the arc and the nodal equations of the electrical system to which the interrupter is connected to compute the arc voltage and current at every time interval. The level of current chopped (i sub ch) at different values of the lineside breaker capacitance CG is determined. The resulting graph of 1 sub ch vs CG is compared to results obtained experimentally, which qualitatively verifies the validity of the model. A theoretical comparison is made between connecting the capacitance from the lineside breaker terminal to ground versus connecting the same value of capacitance directly across the breaker contacts. The model predicted no significant difference in arc stability between the two configurations. However, pertaining to the transient recovery voltage (TRV) the position of lineside breaker capacitance CG produced less severe TRVs at low values of capacitance when compared to the same capacitance connected across the gap. The converse was true at higher values of capacitance.
 Publication:

Ph.D. Thesis
 Pub Date:
 1979
 Bibcode:
 1979PhDT........79G
 Keywords:

 Arc Discharges;
 Capacitance;
 Computerized Simulation;
 Current Density;
 Mathematical Models;
 Algorithms;
 Electrical Resistance;
 Electronics and Electrical Engineering