INNOVATIVE PV 2 DC Grid SOLUTIONS IN THE PUBLIC TRANSPORT GRID
The PV modules convert the solar radiation and generate DC voltage and current. This is suitable advantage for realization of projects in the public transportation system where the generated from the PV system energy is feed direct into the DC grid of the public transport. The PV system provides part of the necessary electricity for the operation of the electric tram, trolley or metro, the remaining is obtained from the conventional electrical grid.
In comparison with the widespread applications of PV systems, when sending PV electricity into the DC public transport networks the process does not require expensive and maintenance demanding equipment like (inverters, transformers).
The energy produced from the PV systems replaces (saves) a part of the consumption of electricity from the conventional grid. This is an additional positive effect because the losses for transformation and conversion of the energy are saved coming from the substations.
When there are changes in the production of the PV systems due to changing weather conditions the DC network is not experiencing any interference because at all time the PV energy supply only replaces the corresponding part of conventional energy, and the difference is always complemented by existing conventional power equipment.
UPS функция при отпадане на захранването на мрежата
The represented concept has promising potential to be cost-effective to achieve lower energy costs, especially in terms of the continuously increasing market prices of electricity.
The present concept is innovative for the Bulgarian market, which creates additional opportunities for development and financing.
POSSIBLE APPLICATIONS OF THE SYSTEM
The photovoltaic system provides some of the electricity needed to charge the vehicles, the rest is supplied by the conventional distribution network.