Types Of Electrical Loads on Power system and load curves, classification

Different types of electrical loads in power system, classification? and load curves

Depending upon uses of electrical energy, loads on power system are divided into a different category for easier understanding here we are going to discuss types of electrical loads according to use and classification of loads and load duration curves.

Electrical power system loads are classified into a different category
1) Residential loads
2) Commercial loads
3) Industrial loads
4) Agricultural loads



1) Residential load:

residential power system load curve
residential power system load curve

Residential load uses electrical energy for doing residential works like home appliances, lighting load. Residential load are uncertain, they varies with time of day. At morning and evening, residential load are at peak values. Load curve of the residential load is shown in the figure.

This loads are mainly light fan, domestic appliances like computer, fridge, heater, micro oven, irons, dryer, air conditioning equipment. Residential loads are about 10% to 14% of total power supplied by the power system.
The main reasons for variation in residential load are city population, per capita income, development, urbanization, living style of people, environment condition.
Residential loads also affected by weather condition, like in winter season less electrical energy consumed for the cooling system but in summer consumption is more. Residential loads face fluctuations during hours of days.

2) Commercial Loads:

Commercial power system load curve
Commercial power system load curve
Commercial loads occur for longer period compare to residential loads. This types of loads are mainly electrical energy utilize for commercial shops, school, colleges, advertising, hoardings, malls, elevator, cinema halls etc. Commercial load fluctuations are mainly due to switching of air-conditioning equipment. These loads vary more depending upon the season. Load duration curve of the commercial load is shown in the above picture.

3) Industrial Loads:

Industrial power system load curve
Industrial power system load curve
Industrial loads have constant demand and consider as base loads. Commercial loads are little affected by seasonal variations and weather conditions.load duration curve is shown in above image. This loads mainly include industrial appliances like motor, furnaces, crains, industrial lighting, computers, elevators, pumps. Industrial loads utilize more electrical energy supplied by utility. This loads does not varies with seasonal change having constant demand through out the day.

4) Agricultural loads :

Agricultural power system load curve
Agricultural power system load curve
 Agricultural types of loads use electrical energy for doing agriculture activities.Agricultural loads mainly includes irrigation pumps, lights, water pumps.


Agricultural load are varies with time.Load factor is generally taken as 15%- 22%Agricultural loads affected due to seasons, environment, weather change.This loads mostly switched on during morning and evening. From above load duration curve we can see that agricultural loads switched on during morning and in evening time. 

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