Overcurrent time delay determination using gain scheduled PID controllers

Author

Zainul, Aidil Azwin ; Ramasamy, Agileswari ; Abidin, Izham Zainal ; Nagi, Farrukh Hafiz

Author_Institution

Dept. of Electr. Commun. Eng., Univ. Tenaga Nasional, Putrajaya, Malaysia

fYear

2009

fDate

7-8 Dec. 2009

Firstpage

89

Lastpage

93

Abstract

The inverse time overcurrent relay operation is based upon the current setpoint and also the time multiplier setting. Depending on the ratio of the value of the current and the setpoint current together with the value of the time multiplier setting, the amount of time delay for the trip command is determined using the inverse time characteristics. This would mean that the relay is not of the adaptive type and would possibly give a maltripping. This paper uses the concept of PID controller to determine the time delay for the overcurrent relay.

Keywords

delays; overcurrent protection; relay control; relay protection; relays; three-term control; gain scheduled PID controllers; inverse time overcurrent relay operation; setpoint current; time multiplier setting; trip command; Delay effects; Equations; Fault currents; Fault detection; Optimization methods; Power system relaying; Protective relaying; Relays; Three-term control; Voltage; Fault severity; Gain scheduling; Overcurrent relay; PID controller; inverse time characteristic;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy and Environment, 2009. ICEE 2009. 3rd International Conference on

Conference_Location

Malacca

Print_ISBN

978-1-4244-5144-9

Electronic_ISBN

978-1-4244-5145-6

Type

conf

DOI

10.1109/ICEENVIRON.2009.5398663

Filename

5398663