Optimal Stochastic Operation of Integrated Low-Carbon Electric Power, Natural Gas, and Heat Delivery System

TLDR

Integrated energy systems enable efficient utilization of multiple energy types. The study investigates stochastic optimal operation of a micro integrated electric power, natural gas, and heat delivery system. The authors propose a low‑carbon micro‑IPGHS that incorporates renewable generation, power‑to‑gas, and combined heat‑and‑power units, and develop a scenario‑based optimal operation model that accounts for demand, renewable uncertainty, energy exchanges, and storage constraints, validated by a case study. The integrated system effectively utilizes variable clean energy to optimize green delivery in the micro‑IPGHS.

Abstract

Integrated energy system is important for the high-efficient utilization of multitype energy systems. In this paper, the stochastic optimal operation is investigated for the micro integrated electric power, natural gas, and heat delivery system (IPGHS). First, a low-carbon micro-IPGHS is proposed with the comprehensive consideration of renewable generation, carbon-capture-based power-to-gas technology, and the combined power and heat units. Second, a scenario-based optimal operation model for micro-IPGHS is proposed to handle uncertainties in energy demand and renewable generation. In the proposed model, energy transactions between micro-IPGHS and upstream energy systems as well as constraints for battery storage, natural gas storage, and heat storage systems are considered. Finally, a case study is used for the proposed low-carbon micro-IPGHS to validate the optimal stochastic operation approach. The proposed integrated system can effectively utilize the variable clean energy for optimizing the delivery of the green operation in micro-IPGHS.