If the daily load curve is divided by 24, what does this curve represent?

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Examoogle · Accepted Answer

Average load for the day

Explanation: The daily load curve represents the variation of load on a power station over a 24-hour period. Dividing the total energy consumed (area under the load curve) by 24 hours yields the average load for that day.

Working Principle: The daily load curve plots the power demand (MW or kW) on the Y-axis against time (hours) on the X-axis. Mathematically, the area under this curve represents the total energy (MWh) generated in a day. By dividing this energy value by the total duration of 24 hours, we compute the constant load that would consume the same amount of energy over the same period, known as the average load.

Key Formulas: $	ext{Average Load} = \frac{	ext{Total Energy Generated in 24 hours}}{24}$; $	ext{Load Factor} = \frac{	ext{Average Load}}{	ext{Maximum Demand}}$

Key Points: The average load is always less than the maximum demand.; The ratio of average load to maximum demand is known as the Load Factor.; Higher load factor indicates more efficient utilization of power station capacity.

Advantages: Useful for calculating the energy consumption of the plant.; Helps in determining the load factor which indicates the economic viability of the plant.

Applications: Used in tariff calculations and cost analysis for electricity billing.; Helps utility companies in scheduling power generation units.

Additional Info: Connected load refers to the sum of continuous ratings of all equipment connected to the supply system.. Maximum demand is the highest load that occurred on the power station during a given period.. Demand factor is defined as the ratio of maximum demand to the connected load.

Answer: A is correct — The average load for a day is defined as the total energy consumed (area under the load curve) divided by the total time of 24 hours.

Exam Tip: Always remember that the Load Factor is always $\le 1$. If your calculated load factor is greater than 1, you have likely swapped the Average Load and Maximum Demand in the formula.

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