The introduction of energy storage equipment in the multi-energy micro-grid system is beneficial to the matching between the renewable energy output and the electrical and thermal load, and improve the system controllability , , .
In order to minimize the economic cost and carbon emissions, the optimization model of energy storage capacity is constructed. Micro energy system considering electric / thermal / gas coupling demand response. Adaptive dynamic weight factor is used to adapt to the flexible planning scene.
The optimization method of energy storage equipment layout is obtained through the IEEE 10-machine 39-node system simulation. Ref.
The energy flow direction of the multi-energy microgrid system is shown in Fig. 1. The system consists of WT (Wind Turbine), Photovoltaic cell, CHP unit, GFB (Gas Fired Boiler), P2G (Power to Gas), EB (Electric Boiler), GES (Gas Energy Storage), TES (Thermal Energy Storage), electrical load, and Thermal load.
It can be seen that the micro energy system can purchase a large amount of electricity in the low electricity price period, and purchase or sell a small amount of electricity in the peak electricity price period, so as to reduce the power purchase cost of the multi energy microgrid system. Fig. 5.
Multi-objective optimization model of comprehensive planning of multiple energy storage forms. Multiple energy storage devices in multi-energy microgrid are beneficial to smooth the fluctuation of renewable energy, improve the reliability of energy supply and energy economy.