The SM has a distinct excitation current value that provides the unity power factor
for each mechanical load.
Providing a Tool for Cost Effective Unity Power Factor
The proposed BESS operates with unity power factor
, injected current total harmonic distortion of less than 5%, and fast dynamic response.
Keywords: Plug-in Electric Vehicles, bi-directional power flow, PWM AC-DC converter, PWM DC-DC buck-boost converter, Vehicle to Grid, Predictive Current Control, Phase Lock Loop, band-stop filter, Total Harmonic Distortion, unity power factor
Results show that the input current corresponding to the proposed configuration has an almost unity power factor
. Furthermore, in the worst case (light loads) the current THD has reached below 5% for the proposed topology.
Consequently, PI2 generates the output reference, m, that processes the error of reactive power from its reference value and keeps the net power injected to the grid at the unity power factor
([Q.sub.ref] = 0).
It can be applied on the DG either operating at a unity power factor
or generating both active and reactive power simultaneously.
Oruganti, <<A unity power factor
converter using half-bridge boost topology,>> Power Electronics, IEEE Transactions, vol.
The purpose of the power control system is to safely transfer the generated WEC powers into the grid at unity power factor
. It should also keep the DC-voltage within a range [[V.sub.DC,low], [V.sub.DC,up]], depending on sea state, to optimize the WEC damping as discussed in Paper .
At unity power factor
, the kVA = kW, therefore the utility company does not supply any reactive power.
* Unity Power Factor
Operations--With the line currents in phase with the line voltages, the unwanted reactive currents are eliminated.
For better utilization of available energy sources, the power supply should have Unity Power Factor
(UPF), hence input current should be in phase with the input voltage and Total Harmonic Distortion should be near to unity.