Current dynamic response for MOV under the step voltages has been investigated. An equivalent circuit and a method of predicting MOV's dynamic parameters in its whole current regions are presented. The MOV's characteristics in a low current region and a heavy current region are proved by the experiments respectively.
Combined with the applications of fiber differential protections in Guangdong provincial electric power system, the main factors that influence the reliability and sensitivity of the differential protection based on phase split whole current differential principle are discussed. It includes load current, distributed capacitance current, parameter k and TA performance.
The magnetic field of the conductive current (the current distributed on the plates of a circular parallel plate capacitor plus the feeder current) is numerically studied. The numerical result is compared with that from whole current law under the condition of ignoring border effect.
This paper first analyses the sensitivity and stability of full current protection and incremental current protection. Then it analyses the affect of load current and charge current between the two criterions on the line internal fault and external fault.
This device employs the methods of 96 sample points per power cycle and short-window fast algorithm,takes fault component current differential,full current differential,and zero-sequence current differential as criteria of its differential protection. It takes 16～18 ms when operated in 500 kV dynamic simulation test.
The conception of the full current compensation of one-phase-to-ground fault is that the compensator compensates not only the reactive current of the zero-sequence network, but also the active current of that one, and makes the residual fault-current approximate to zero.
The total current in the external circuit and the difference of the potentials of the conducting walls are found as functions of the external load, the Hartmann number, and the ratio of the lengths of the sides of the duct.
The uranium ion beam with a total current of 150 mA was obtained, U7+ uranium ions being 10% of the current.
It was shown that the current compensation could be correctly determined by measuring the total current with the Rogowski loops placed inside the drift pipe and not with resistive shunts.
The total current of flash corona electric discharge from 50 electrodes was 3 mA.
Electrolysis of the system Ti(IV)-NH2OH- C6H6 in 11 M H2SO4 and 5 M CH3COOH leads to formation of aniline and isomeric phenylenediamines with a total current yield of 137%.