An Evaluation Method for Hosting Capacity of Electric Vehicles in Distribution Networks Based on External Penalty Function Method and Improved Whale Optimization Algorithm
|更新时间:2026-04-08
|
An Evaluation Method for Hosting Capacity of Electric Vehicles in Distribution Networks Based on External Penalty Function Method and Improved Whale Optimization Algorithm
An Evaluation Method for Hosting Capacity of Electric Vehicles in Distribution Networks Based on External Penalty Function Method and Improved Whale Optimization Algorithm
To address the hosting pressure on distribution network operation caused by the large-scale integration of electric vehicles (EVs) and distributed generations (DGs)
an evaluation method for the hosting capacity of electric vehicles in distribution networks based on the external penalty function method and the improved whale optimization algorithm (IWOA) is proposed. Firstly
a refined model for the available hosting capacity of EVs in the distribution network is established
aiming to maximize the total charging power that the system can accommodate
while comprehensively considering multiple constraints such as power flow balance
node voltage
and line current. Secondly
by employing the external penalty function method combined with a power flow calculation module
the nonlinear constraint problem in the model is transformed into an unconstrained optimization problem for solution. Furthermore
a nonlinear convergence factor and a dynamic adaptive weight mechanism are introduced into the traditional whale optimization algorithm (WOA) to effectively enhance the algorithm's global search capability and convergence stability. Finally
a case study is conducted on a modified IEEE 33-node distribution system. The results demonstrate that the proposed method can effectively evaluate the hosting capacity of electric vehicles in distribution networks with DG. In terms of solution accuracy and convergence performance
it outperforms the traditional WOA
genetic algorithm
and grey wolf optimization algorithm
providing reliable decision-making support for charging infrastructure planning.
XIANG Y,XUE P,WANG Y,et al. Robust expansion planning of electric vehicle charging system and distribution networks [J ] . CSEE Journal of Power and Energy Systems,2024,10(6): 2457-2469.
DOU C X,ZHOU X H,ZHANG T F,et al. Economic optimization dispatching strategy of microgrid for promoting photoelectric consumption considering cogeneration and demand response [J ] . Journal of Modern Power Systems and Clean Energy,2020,8(3):557-563.
SOOFI A,MANSHADI A,LIU G,et al. A SOCP relaxation for cycle constraints in the optimal power flow problem [J ] . IEEE Transactions on Smar t Grid,2021,12(2): 1663-1673.
DASU B,MANGIPUDI S,RAYAPUDI S. Small signal stability enhancement of a large scale power system using a bio-inspired whale optimization algorithm [J ] . Protection and Control of Modern Power Systems,2021,6(4): 1-17.