Multipurpose Power System Protection Set that Provides Constant Remote Serviceability Control
Dauren D. Issabekov
Abstract
In this paper, the author suggests a principle of layout and functioning of a resource-saving power system protection set that provides remote and constant serviceability control of each element of a switchgear. It is designed to provide universal protection of each switchgear bay (operating at 6–10 kV) from internal short circuits, arc faults, and external short circuits caused by faults of power equipment connected to the set. All the proposed suggestions combined can be treated as a new approach towards protective relays usage in power system protection. This multi-purpose set can provide many types of protection. For example, quick action against short circuits causing electric arcs; overload protection based on photodiodes, thermistors and reed switches, which are reactive to light intensity and temperature change observed in the cells of the set; overcurrent protection that is based on reed switches (sensitive to the magnetic field of the conductor phases) and protects against external phase-to-phase short circuits. The use of the presented protection methods can improve protection's reliability for both the cell and the electrical equipment connected to it. The discussed protective relay set can fit switchgears of all editions, both indoor and outdoor installations.