Power and Energy Measurement Methods
1. Power measurement method
1) Direct method: The electric power meter, digital power meter or three-phase power meter can be used to measure the power directly. The single-phase power meter can also be connected to the two-meter method or the three-meter method to measure the three-phase power, although there is a summation process. , but it is still generally classified as a direct method.
2) Indirect method: DC power can be obtained indirectly by measuring voltage and current. AC needs to obtain power from voltage, current and power factor.
2. Electric energy measurement method
1) Direct method: direct measurement of electric energy, electric energy meter can be used for DC, induction system or electronic energy meter for AC.
2) Indirect method: The indirect method is generally not used for electric energy measurement, and only when the power is stable and constant, the power meter and the timing clock are used for measurement.
