【Symbol】

Ep

【Unit】

Wh, kWh

【Definition】/【Calculation Formula】

Active energy is the integral of active power over time.

Referring to active power,  the active energy can be expressed as: 

【Classification】

Since power has direction, positive values indicate energy consumption, while negative values indicate energy release. Therefore:

Consumed Active Energy (Import, Forward Active Energy): Energy consumed by the load.

Generated Active Energy (Export, Reverse Active Energy): Energy released by the load.

Total Absolute Active Energy (Total): The sum of the absolute values of consumed and generated active energy.

Net Active Energy (Net): The difference between the absolute values of consumed and generated active energy.

【Application】/【Prevention】

Application Significance: The active energy recorded by the energy meter is the primary basis for billing and settlement.

Extended Introduction: The reactive energy meter is used to calculate the average power factor for the month.

Monthly Average Power Factor=

where P is the active energy and Q is the reactive energy for the month.

Maximum Demand Meter: Used to calculate the maximum average power consumed by the user in a month.

Loss Meter: Calculates the energy losses due to transformer core losses and line copper losses during the user's electricity consumption.

Utility Departments: Adjust electricity prices in a timely manner based on the above various measurements.

【Related Terms】

Quadrant Energy

Reactive Energy