Portfolio management strategy for power‐to‐gas storage‐driven natural gas power generation

Abstract

Summary The power‐to‐gas (P2G) technology can convert renewable energy into natural gas. When needed, gas‐fired power generation can convert natural gas back to electricity. Therefore, if P2G is deployed on a large‐scale as an energy storage system in the future, the gas‐fired power generation is likely to account for a bigger share in the generation mix. A risk management strategy has been proposed to hedge the risk of price fluctuation and to increase the earned profits. To be more specific, the financial options and the P2G storage device will be applied. In this paper, two cases will be analyzed. They are the traditional case and the case with the put option. Under the put option case, four scenarios have been examined, they are the scenarios without the storage, with P2G, with battery storage devices, and with the combination of the storage devices. This paper compared the profits, returns, and risks of using the P2G with that of using the battery. The optimal weight of investment between the two types of storage devices will be determined via the mean–variance theory. Through the simulations of the 4‐year electricity prices, it has been found that the put option can hedge the risks and increase the profits of the gas generators only when the storage devices are utilized. This is due to the operation mechanism of the put option.