Explain THD & TDD in power quality.
The total harmonic distortion, or THD, of a signal is a measurement of the harmonic distortion present and is defined as the ratio of the sum of the powers of all harmonic components to the power of the Fundamental frequency.
TDD(I) = Total Current Demand Distortion is Calculated harmonic current distortion against the full load (demand) level of the electrical system. At the full load TDD(I)=THD(I). So TDD gives us better insight about how big impact of harmonic distortion in our system. For example we could have very high THD but the load of the system is low. In this case the impact on the system is also low.
Article 4.6.2K : What is Leading and Lagging power factor?
Lagging and Leading power factor When the current ‘I’ lags the voltage ‘V’ by an angle ‘θ’ is said to be as ‘Lagging power factor’ When the current ‘I’ leads the voltage ‘V’ by an angle ‘θ’ is said to be as ‘Leading power factor’. The figure which ...
Performance Assessment of Power Factor Capacitors.
Voltage effects: Ideally capacitor voltage rating is to match the supply voltage. If the supply voltage is lower, the reactive kVAr produced will be the ratio V1 2 /V2 2 where V1 is the actual supply voltage, V2 is the rated voltage. On the other ...
Article 2.0.4D : What is the purpose of Power Assist?
Power Assist can be installed between Meter & Gateway to avoid "240V AMF input". Existing method (before Power Assist) - "240V AMF" input needs to be connected to the meter to detect the power as DG. New method (After Power Assist) - When power ...
Where to connect power assist In DG panel with looping of Rs 485 from meter which has DG supply. How it will update software Through Lan cable looped to gateways and from gateways to software.
Explain Overcurrent, Overload and Overvoltage.
Overcurrent: Overcurrent is the condition where the excessive current starts to flow in the circuit due to overload and especially short circuit. Overcurrent protection is generally a protection against short circuit where excessive current starts ...