Title :
A voltage drop-based approach to include cold load pickup in design of distribution systems
Author :
Gupta, Vinit ; Pahwa, Anil
Author_Institution :
Kansas State Univ., Manhattan, KS, USA
fDate :
5/1/2004 12:00:00 AM
Abstract :
In distribution systems with large residential load, thermostatically controlled devices contribute major portion of total load. Restoration of such systems after prolonged interruption may create a load significantly higher than the normal load. This condition is called cold load pickup (CLPU). The enduring component of CLPU may cause severe voltage drops along the feeders and transformer heating, thus making the system restoration difficult. This paper discusses an approach to include restoration under CPLU conditions in distribution system planning and expansion. The approach can be applied to determine the most optimal transformer size and feeder sizes while ensuring the minimal restoration time and acceptable voltages and transformer heating during CLPU conditions. The aim is to develop a tool that can be used in conjunction with the overall distribution system design to ensure quality power even in emergency conditions while minimizing the cost.
Keywords :
electric potential; power distribution planning; power supply quality; power system restoration; cold load pickup; distribution system planning; power quality; power system planning; power system restoration; restoration; thermostatically controlled device; transformer heating; voltage drop-based approach; Control systems; Costs; Heating; Power system planning; Power system restoration; Power transformers; Surges; Switches; Temperature; Voltage;
Journal_Title :
Power Systems, IEEE Transactions on
DOI :
10.1109/TPWRS.2003.821440