Coordinated Planning And Operation Method For Regional-District Multi-Energy System

Integrated energy system would significantly enhance the reliability,resilience and sustainability of the multi-energy system.To promote the development of the multi-energy system,it is important to study on the accurate model for the multi-energy system.Besides,the planning and operation methods for the multi-energy system should also be studied.This paper provides a regional-district multi-energy system model.Based on the proposed model,the coordinated planning and operation method for the regional-district multi-energy system is proposed.Furthermore,the coordinated regional-district method of the multi-energy system for resilience enhancement is provided.The main progresses are as follows:(1)According to the transmission characteristic of different types of energy,the concept of regional-district multi-energy system is put forward.The characteristcis of regional multienergy system and district multi-energy system is introduced,respectively.The cooresponding regional-district multi-energy system model is provided.Based on this model,the coordinated stochastic planning method for regional-district multi-energy system with a high penetration level of wind power is proposed.The uncertainty of wind power is described by the scenarios.The stochastic programming is adopted to deal with the uncertainty.Since the proposed model is a large-scale programming problem,which is hard to solve directly.The Benders decomposition is adopted to solve this problem.The proposed method and solution technique are tested on the 6-bus 6-node electricity-gas integrated system.Numerical results illustrate the validity of the proposed model and solution technique.(2)A robust day-ahead scheduling method for the regional-district multi-energy system penetrated with a large wind power is proposed.The uncertainty of wind power is described by the output interval.The two-stage robust approach is applied to deal with the variable wind power.The first-stage decides the commited units,while the second-stage co-operates the regional-district multi-energy system.Since the two-stage robust problem cannot be solved by the commercial solver,the nested column-and-constraint generation method is utilized to solve this problem.Two acceleration strategies are applied to decrease the scale of problem and enhance the convergence.The proposed model and solution technique are tested on a 6-bus 3-node electricity-gas system and a modified IEEE 118-bus 10-node electricitygas system.Numerical results show that the coordination of the regional and district multi-energy system can significantly improve the consumption of wind power.(3)A coordinated regional-district operation method of multi-energy system for resilience enhancement against natural disasters is provided.The impact of the natural disaster is modeled as random outage in the regional multi-energy system.A two-stage robust approach is applied to deal with the random outage.The first-stage is preventive stage,during which preventive actions are scheduled before the natural disaster strikes.The second-stage is corrective stage,during which the corrective actions are scheduled under the natural disaster.The active district multi-energy system is proposed,which can deliver electricity to the regional multi-energy system.Since the model cannot be directly solved by the commercial solver,a solution technique combining the Benders decomposition and columnand-constraint generation is provided.The proposed model and solution technique are tested on a 6-bus 6-node electricity-gas system and modified IEEE RTS-79 40-node electricity-gas system.The numerical results show the effectiveness of the proposed model and solution technique.