Abstract:

In recent years, there has been an increase in the development of the electromobility (e-mobility) market, which directly results in the increased requirement of charging stations supplied from the public distribution network. Electric vehicles will be an integral part of the smart grid in the future. The chargers that come with the V2G (vehicle to grid) service provide bidirectional electrical energy flow between the cars and the grid. Although this functionality has many advantages, the current paper presents doubts about the safety of the people involved in the operation and maintenance of electrical power equipment. The purpose of this paper is to draw attention to the potential risks that may arise by the unintentional flow of voltage back to the network from the V2G charger. It also signals the necessity to develop security requirements and connection conditions for the electrical distribution grid.  A deeper analysis of the problem raised should be made while the principles of connecting chargers with V2G service to the distribution network are developed.