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Paper Information

Title: 

EFFECT OF DEMAND MESURING INTERVAL TIME ON ELECTIC POWER LOSSES

Type: SPEECH
Author(s): HEIDARI GH.,HASHEMIAN M.
 
 
 
Name of Seminar: INTERNATIONAL POWER SYSTEM CONFRENCE
Type of Seminar:  CONFERENCE
Sponsor:  SHERKATE TAVANIR
Date:  2004Volume 19
 
 
Abstract: 

IN PLANNING AND POWER PLANT GENERATION REGULATION DURING PEAK PERIOD OF NATIONAL GRID THE LOSSES DURING THE PEAK HOURS ARE ONE OF THE MOST IMPORTANT FACTOR. SINCE THE LOSSES ARE DIRECTLY RELATED TO THE SQUARED OF TRANSMITTED POWER, THEREFORE, THE POWER LOSSES DURING THE PEAK HOURS REACH TO THEIR MAXIMUM AMOUNTS.
THOUGH, CALCULATION OF POWER LOSSES SEEMS TO BE A SIMPLE TASK BUT IF THE REAL AMOUNT OF CONDUCTORS RESISTANCE DO NOT BE TAKEN INTO ACCOUNT IN CALCULATION OF POWER LOSSES, THEN AMOUNT OF POWER LOSSES WOULD NOT BE CALCULATED ACCURATELY AND THAT WOULD LEAD TO WRONG EVALUATION OF LOSSES. SINCE THE DEMAND OR PEAK OF CONSUMPTION OF ELECTRICITY IS CHANGING ALL THE TIME THEN THE CHANGES OF POWER LOSSES ARE A NATURAL CONSEQUENCE OF IT. AS A RESULT THIS QUESTION ARISES THAT:
“HOW SHOULD THE PEAK LOAD OR MAX. CONSUMPTION BE MEASURED?”
THOUGH THERE ARE SEVERAL EQUIPMENTS FOR MEASURING OF THE ELECTRIC CONSUMPTION DEMAND BUT WITH ALL EQUIPMENT, THE MEASURING OF DEMAND IS CARRIED OUT FOR CERTAIN PERIOD OF TIME IN OTHER WORDS, THE AVERAGE ENERGY IN A KNOWN TIME INTERVAL IS CONSIDERED AS PEAK LOAD. NATURALLY BY PROLONGING THE PERIOD OVER WHICH THE AVERAGE IS TAKEN THE VARIATION OF LOAD WILL BECOME MORE PRONOUNCED AND THE FIGURE WHICH IS ATTRIBUTED TO AS PEAK LOAD WILL BE FAR AWAY FROM THE INSTANTANEOUS PEAK LOAD AND THIS BY ITSELF CAN BE THE CAUSE OF INCREASE OF POWER LOSSES.
IN THIS PAPER, THE PEAK LOAD OF AN INDUSTRIAL CUSTOMER IN TEHRAN REGION HAS BEEN MEASURED AT VARIOUS PERIODS OF MEASUREMENT AND THEN ANALYZED. THE RESULTS INDICATE THAT, BY REDUCING THE TIME INTERVAL OF PEAK MEASUREMENT FROM 15 MINUTES DOWN TO TWO MINUTES THE CONSUMPTION DEMAND WILL INCREASE BY 18 PERCENT AND POWER LOSSES BY 42 PERCENT.

 
Keyword(s): PEAK LOAD, CONSUMPTION DEMAND, INTERVAL TIME, POWER LOSSES, LOAD & LOSS FACTORS
 
 
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