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**Electrical Engineering interview question and answers:****Job interview or viva Topics for Electronics and Electrical Engineers (Part-2).**

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**In this topic we discuss about ****Load Curve,Demand Factor and Load Factor.**

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**4. Load Curve:**

The curve which shows the variation of
load on the electrical power station with respect to time is known as load
variation curve or simply load curve.

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**5. Importance of Load Curve: **

- The Daily Load Curve gives the information of load on the power station during different running hours of the day.
- The number of unit’s generation per day is found from the area under the daily Load Curve.
- Average load is found from the Load Curve.

**Average load= [Area (KWh) under daily load curve/24 hours]**

- The maximum demand of the station on that day is found from the highest point of the daily Load Curve.
- The size and the number of generating units can be determined from the load curve.
- This Load Curve helps to determine the operation schedule of the station. In that case when all the units or the less units needs to running is found.

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**6. Demand Factor: **

The
ratio of maximum demand and connected load on the power station is called as
demand factor.**Demand Factor= [Maximum Demand/Connected Load]**

- In the power station Maximum demand < Connected Load.
**Demand Factor < 1**- Demand Factor is very important in determining the capacity of the plant equipment.

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**7. Load Factor: **

The
ratio of Average load and the Maximum demand in a given period of time in a
power plant is known as load factor.**Load factor = [Average load/ Maximum demand]**

- In a
power plant
**Average load < Maximum demand** **Load factor<1.**

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