.gif)
Abstract
Loads/equipment especially in industrial applications and other different applications that use electric motors, draw current from the network while rotating, but in case of a sudden force (braking effect) they start to produce electricity themselves. This energy is sent back to the source they are fed and in such a case the regenerative energy should be managed.
If this type of load is fed by a UPS (uninterruptible power supply), in the braking mode, the UPS applies the extra energy to its DC BUS through the reverse diodes of the output power transistors (IGBT), which causes the DC BUS voltage to rise.
This extra energy, regenerative energy, may be used by other equipment in the network when is possible and if not (technically), to prevent the DC BUS rise, a resistor group driven/ controlled by the respective controller is placed on the DC BUS to “re-route” the energy usage and prevent the UPS damage.
In this paper we provide an algorithm that may be used to control this process of using regenerative energy by network or by re-routing it in the group of resistors.
VIEW FULL PAPER:
Nenhum comentário:
Postar um comentário