The circuit diagram of compensation capacitors and peripheral hardware in the implemented hybrid reactive power compensation system is also given in Fig. 7. As can be seen in this figure, there are six single-phase and two three-phase capacitors. Rated powers of each capacitor are also shown in the same figure.
As can be seen in this figure, there are six single-phase and two three-phase capacitors. Rated powers of each capacitor are also shown in the same figure. In the hybrid system, as a controller, a program that was written in accordance with the method explained in the previous section was used.
In the first case, assuming that only capacitors exist in the compensation system, classical reactive power compensation was applied. In the second case, hybrid compensation was done by using hybrid reactive power system with synchronous motor, which is the subject and purpose of this study.
This is mainly due to two reasons. The first is that the coil loads and capacitors in the system also draw some active power. The second reason is that the synchronous motor used in the hybrid compensator also draws an active power due to its own power losses.
The controller, after some calculations, decides on the capacitor stages closest to these powers and activates them. However, after the capacitors are switched on/off, unlike conventional capacitor switched compensation systems, the reactive powers drawn from each phase of the grid must be of the same type.
Therefore, by taking into account the balance between cost and performance, a new hybrid system is developed and introduced in this paper. The hybrid compensation system provides to reach unity power factor through the coordinated control of a synchronous motor and switched capacitors.
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