Optimal scheduling of multiple energy system considering power to gas unit

Abstract

With the development of energy society, energy shortage and environmental pollution are urgent problems we need to tackle. Electricity, natural gas, cooling, heating and other different energy carriers in multiple energy system can be transformed between each other. The operational cost of whole energy system can be reduced and energy utilization efficiency can be improved with coupling relationship among different multiple energy carriers. In integrated energy system, power to gas (P2G) unit has received considerable attention worldwide recently because it can transform power into natural gas or hydrogen, which can better utilize electricity such as extra wind power during off-peak load period and decrease the operational cost for natural gas and peak-period load. Therefore, this paper pays attention to optimal scheduling of multiple energy system considering power to gas unit. It first briefly introduces the general concept of multiple energy system, which can be divided into energy hub and combined power and gas network. Then it elaborates the characteristics and modelling of energy hub considering power to gas unit including typical energy conversion and energy storage units. Based on that, an optimal scheduling problem for multiple energy system with power to gas unit is proposed. Finally, numerical analysis is conducted to demonstrate the effectiveness of the proposed model.