Voltage Stability Analysis of Distribution Network Considering Massive Electric Vehicle Charging Load

In order to assess the impact of large-scale integration of electric vehicles (EVs) into the distribution grid on its stability, a modeling approach is employed based on EV user behavior and charging characteristics. Different charging modes, namely conventional charging, fast charging, and battery replacement charging, are modeled, taking into account voltage stability indicators. The charging power of EVs is analyzed under these three scenarios, considering user behavior and charging characteristics. Additionally, a particle swarm optimization algorithm is employed in simulations to study the voltage stability of EVs during different time periods in the charging process. By integrating the above factors, the impact curve of EV charging load on the distribution grid is obtained. This analysis method not only validates the feasibility of the voltage stability analysis approach but also assesses the influence of EV charging load on various nodes in the distribution grid.