AN OPTIMAL DISPATCHING METHOD OF MULTI-REGION POWER AND GAS COUPLED INTEGRATED ENERGY SYSTEM USING TIERED GAS TARIFF

摘要

#$%^&*AU2019101104A420191031.pdf#####ABSTRACT Integrated energy system based on Combined Cooling, Heating and Power (CCHP) technology has been proved as an efficient approach, which can resolve energy and environment issues and meanwhile generate economic benefits. For areas with fragile grid infrastructure and abundant oil, gas and renewable resources, various types of energy sources can complement each other and be consumed effectively, by operating the energy networks across regions as a single integrated energy system through the implementation of multi-region power and gas coupled integrated energy system. Conventionally, a typical optimized scheduling of power and gas coupled integrated energy system does not consider the complementarity among areas with diverse device and load characteristics. Since changes and developments have happened in power-to-gas conversion technologies and intra-regional CCHP system, traditional models need to be updated and improved along with the application of tiered gas price. Based on the existing coupled power-gas flow scheduling model, the invention proposes an optimal dispatching method of multi-region power and gas coupled integrated energy system where a CCHP system is running inside a region and power-gas complementarity can be achieved among multiple regions. Mixed Integer Linear Programming (MILP) is used to obtain the optimal solution of this scheduling model. The compressor linearization model is applied in order to describe transmission loss of gas network and perfect the power-gas flow model as well. Combined with the tiered gas tariff, the total operation cost of regions can be reduced and the day-ahead economic optimized scheduling can be improved as well.1/2 DRAWING Begin Input equipment parameters, load and renewable energy generation forecast data Establish the model of combined cooling, heating and power system inside the region Ir Input the number and type of functional regions, multi-energy network parameters and the segment number of incremental linearization gas flow model Establishthe model of multi-region power and gascoupled integrated energy system Input the segment number and the gas consumption coefficient of the compressor linearization model Establish the double-layer linearization model of the compressor Input peak and off-peak electricity price, line loss unit price, tiered gas tariff and the unit price of compressor gas consumption Establish the optimal dispatching model of multi-region power and gas coupled integrated energy system considering tiered gas tariff with the goal of minimizing the total operation cost of all the regions Output operation results of each device, network operating status and economic results of each region (: End Fig. 1