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| Multi-Regional Integrated Energy System Collaborative Planning Considering Biomass Storage and Transportation Mode |
| Liu Xiaohui1, Wang Xiaojun1, Zhang Yizhi1, Sun Qingkai1, Xi Xiao2 |
1. School of Electrical Engineering Beijing Jiaotong University Beijing 100044 China;
2. Jilin Electric Power Engineering Co., Ltd. Power China Changchun 130022 China |
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Abstract With the implementation of China's “dual carbon” policy, building an integrated energy system dominated by renewable energy is the direction of future energy system. Biomass energy has attracted widespread attention due to its advantages of environmental protection, renewability, wide distribution and other advantages. Compared with fossil fuels, biomass has the characteristics of scattered raw materials and complex storage and transportation mode. How to balance raw material storage and transportation costs and energy transmission losses is an important issue for biomass multi-regional planning. Therefore, this paper proposed a collaborative planning method for a multi-regional integrated energy system that considered the biomass storage and transportation mode, and taken a typical comprehensive area in Jilin Province as an example, it is verified that the proposed planning method can significantly reduce the system planning cost.
Firstly, in view of the resource endowment and energy demand of northeast China, a multi-regional interconnection system structure is constructed, which consists of straw storage and transportation system, CHP system of each park and inter-regional energy interaction system. Secondly, considering the disadvantages of the transmission energy supply scheme based on traditional storage and transportation mode in the multi-regional system, a transportation raw material energy supply mode based on biomass "point-middle-center" storage and transportation mode is constructed. And a refined cost model of biomass storage and transportation is established. Finally, fuel transportation and energy transmission are compared based on different biomass storage and transportation modes, a multi-regional cooperative planning model is established with the aim of regional overall economy. This planning method can realize a balanced energy supply between fuel transportation and energy transmission, so as to make reasonable allocation and efficient utilization of straw in the region, and improve the overall economy of the system.
Based on the actual data of a typical comprehensive region in Jilin Province, the simulation results show that the "point-middle-center" storage and transportation mode is adopted in the multi-regional system of biomass, and the distance between the temporary storage station and each park was considered in the initial planning stage, which can optimize the distribution of straw resources and reduce the transportation cost by 25.4%. At the same time, through the collaborative optimization of straw raw material storage and transportation cost and energy transmission loss to realize the optimal utilization of straw resources, the total cost of collecting, storing and transporting straw in the region is reduced by 3.86 million yuan, and the total cost of system planning is reduced by 3.9%. In addition, each park according to its own electricity price mechanism and energy demand to achieve thermal interaction, can reduce equipment capacity waste, achieve higher overall benefits.
The following conclusions can be drawn from the simulation analysis: (1) The distributed "point-middle-center" storage and transportation mode is adopted in the multi-regional system, which can be transported by the adjacent temporary storage station according to the demand of straw fuel in each park, thus saving the transportation cost. (2) The multi-regional collaborative planning scheme based on biomass "point-middle-center" storage and transportation mode by transporting raw materials can optimize the allocation of straw resources, improve the utilization ratio of equipment, reduce capacity waste, and improve the overall economy. (3) From the aspects of biomass storage and transportation, energy supply mode and system coordination planning model, the method presented in this paper and the above conclusions are universal.
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Received: 01 November 2021
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2023, Vol. 38 
