Coordinated Planning Of Integrated Energy System Considering Integrating New Energy Vehicles

The construction of an integrated energy system can promote the low-carbon utilization of energy from the energy supply side.It is also a key measure to achieve the goal of “carbon peak”and “carbon neutral” in China.The development of new energy vehicles has realized the clean replacement of petroleum fuel from the energy demand side.It is an important starting point to achieve the “double carbon” goal.The large-scale application of new energy vehicles is conducive to constructing an integrated energy system under the new interconnection form,where transportation and energy systems are closely integrated,and the advantages of interconnection are significantly improved.However,the inconsistency of time scale of traffic flow and energy flow modelling and the strong nonlinearity and high complexity of the transportation model bring difficulties and challenges to the coordinated planning of integrated energy system where transportation and energy systems are integrated.Therefore,it is urgent to carry out research on the coordinated planning of integrated energy system that takes into account the integration of new energy vehicles and the interconnection of traffic flow and energy flow.The advantages of integrated energy systems interconnection are thus maximized,and the planning economy is significantly improved.Based on the full investigation and summary of the existing research,this paper carries out comprehensive research on the coordinated planning of the integrated energy system considering integrating new energy vehicles.The main research contents are as follows:(1)For the integrated energy system based on the interconnection of transportation systems and power distribution systems,a transportation-distribution system coordinated planning model based on mixed-integer second-order cone programming is constructed.A privacy-oriented decentralized decision-making method for transportation-distribution system collaborative planning based on Lagrange relaxation is proposed.The privacy protection of transportation and power distribution system is realized,and the computation speed of coordinated planning is improved.The simulation results show that the proposed coordinated planning model can improve the planning economy of the transportation-distribution system compared with the uncoordinated planning model,and the proposed decentralized decision method can ensure the privacy-preserving of the subsystems and improve the computational performance.(2)Aiming at the situation that the coordinated transportation and distribution systems are vulnerable to natural disasters,a three-layer robust coordinated planning model of transportation and distribution systems is proposed to deal with uncertain natural disasters.The proposed model ensures that the load shedding under the worst natural disaster scenarios does not exceed the limit value.Combined with Benders decomposition and column constraint generation algorithm,the solution technique for the three-layer planning model with integer variables in the inner layer is proposed.The simulation results show that the consideration of natural disasters improves the robustness of the coordinated planning of the transportationdistribution system.The load shedding level under the influence of disasters is controlled,and the proposed solution algorithm has good convergence performance.(3)Aiming at the integrated energy system based on the interconnection of transportation,power distribution,and hydrogen systems,a coordinated planning method for transportationdistribution-hydrogen systems based on multi-scenario stochastic planning is proposed.The differences in traffic loads and the characteristics of photovoltaic power generation are taken into account.The multi-network synergy effect of the transportation-distribution-hydrogen network is considered,and the multi-energy complementary advantages of photovoltaic power generation and electrolytic hydrogen production are utilized.Benders decomposition algorithm is applied to solve the proposed multi-scenario problem.The simulation results verify the effectiveness of multi-network coordination and the economic advantages of multi-energy complementation.The proposed algorithm can effectively solve the multi-scenario stochastic programming problem.(4)Aiming at the integrated energy system based on the interconnection of transportation,power distribution,and natural gas systems,the conceptual design of a hybrid energy station integrating energy conversion,storage,charging,and gas refuelling and its inner energy flow modelling method are proposed.To accommodate the uncertainties of renewable energy,a robust planning model for hybrid energy supply stations based on the coordination of transportation,distribution,and natural gas networks is proposed.The solution algorithm based on nested column constraints generation is proposed,and several acceleration strategies are introduced to improve computational performance.The simulation results show that the hybrid energy supply stations planning based on the coordination of multiple networks is beneficial to improve the economics of planning,and the proposed algorithm has advantages in computational performance.