In order to meet the requirement of deeply limiting the operating overvoltage level of a 500 kV AC power system, a controllable metal oxide surge arrester with a trigger switch was developed. The key ...

Metal oxide surge arresters are of great significance for surge arrester configuration, insulation coordination research, and system reliability calculation. Their accurate modeling depends on precise ...

The digital algorithms presently available for on-line monitoring of metal oxide surge arrester (MOA) are normally based on a simplified equivalent model consisting of a capacitor and a nonlinear ...

In the simulation of very fast transient over-voltage (VFTO), establishing the accurate equivalent model of electrical equipments in GIS has a major effect on the calculation results. At present, ...

Monitoring the leakage current of surge arrester can find its defects in time, which is of great significance to the security and stability of power system. But the complex environment will increase ...

The development of the electric power grid has boosted the use of metal oxide surge arresters in electrical systems. These devices serve as protective measures and aid in insulation coordination.

The line surge arrester can effectively improve the lightning protection performances of transmission lines by eliminating the insulator flashover. If the line arrester is very close to the insulator ...

This paper deals with the development of an accurate finite-element model of an arrester to investigate the electrothermal and mechanical stress during dc current interruption. The comprehensive ...

The development of condition evaluation for power transformer maintenance are presented in this paper. The techniques consist of three types: electrical test, insulating oil test and visual inspection ...

Standards recognize that particular attention is required for the earthing of surge arresters which present locations for the passage of high frequency/transient currents. However, although good ...

With the increasing trend toward electrical power distribution to industrials at primary voltages, it is important to provide proper surge protection for primary stepdown transformers. To provide ...