1. Increased energy demand
With the rapid expansion of the electric vehicle (EV) market, more and more consumers are choosing EVs as their daily travelling tools. This means that the energy demand for charging piles is also growing rapidly. Compared with
traditional fuel vehicles, the energy demand for EVs mainly comes from the power grid, especially during peak charging hours, when the centralised charging demand from charging piles puts higher demands on the power supply capacity of the grid. In order to meet the growing demand for EV charging, the power grid needs to increase its power supply capacity accordingly and expand or upgrade its power facilities to ensure a stable supply of electricity.
2. Increased load fluctuation
The charging behaviour of electric vehicles has greater randomness and volatility, which brings challenges to the load balance of the power grid. As the charging time, charging location and charging volume of EV users vary, the power demand of charging piles is also uncertain. During peak charging hours, numerous EVs charging at the same time may lead to a rapid increase in grid load, while during charging trough hours, the grid load may drop significantly. Such load fluctuations not only increase the difficulty of grid scheduling, but may also have an impact on the stable operation of the grid.
In order to cope with the challenges posed by load fluctuations, power grids need to adopt advanced scheduling technologies and energy storage devices to balance power supply and demand. For example, the grid can perform dynamic scheduling based on the real-time power demand of charging piles, and reasonably allocate power resources to individual charging piles. At the same time, the power grid can also use energy storage equipment to release power at peak load times and absorb power at low load valleys, thus effectively balancing the power grid load.
3. Grid security risks
Failure or improper operation of charging piles may cause security risks to the power grid. Firstly, the electrical equipment of the charging pile may have quality problems or aging phenomenon, leading to safety problems such as electrical failure or short circuit. Secondly, the installation and maintenance of charging piles may not be standardised, such as not being installed in accordance with the relevant standards, or not being serviced and maintained in a timely manner. These issues may cause voltage fluctuations, current shocks and other safety hazards to the power grid, and may even lead to power grid accidents in serious cases.
