Optimal Operation of Multi-Carrier Energy Networks Considering Uncertain Parameters and Thermal Energy Storage

Abstract

The coordination of energy carriers in energy systems has significant benefits in enhancing the flexibility, efficiency, and sustainability characteristics of energy networks. These benefits are of great importance for multi-carrier energy networks due to the complexity of obtaining optimal dispatch, considering the non-convex nature of their energy conversion. The current study proposes a robust operation model for the coordination of multi-carrier systems, including electricity, gas, heat, and water carriers concerning thermal energy storage technology. Thermal energy storage is for storing extra heat generated by combined heat and power (CHP) plants and boilers in time intervals with low heat demand on the system and discharging it when required. Energy network operators should have the capability to manage uncertain energy loads to study the impact of load variation on the decision-making process in network operation. Accordingly, this study employs an information gap decision theory (IGDT) method to model the uncertainty of the power demand in optimal system operation. By applying the IGDT approach, the operator of the energy system can use the appropriate methodology to obtain a robust optimal operation. Such a modeling approach helps the operator to make suitable decisions about probable variations in power load. The introduced model is applied in a test system for evaluating the performance and effectiveness of the introduced scheme.

Evaluation of hydrogen storage technology in risk-constrained stochastic scheduling of multi-carrier energy systems considering power, gas and heating network constraints

“…A bi-level model for multi-carrier systems has been presented in [14], where expansion planning and operation of the system are studied in the upper and lower levels. A robust operation model of multi-carrier energy systems has been introduced in [15] considering the uncertainty of load, where the effect of water desalination systems and thermal storage have been investigated. A linearization approach is introduced in [16] to analysis the non-linear limits of the gas system.…”

Security Analysis of Hybrid Multi-Carrier Energy Systems

“…The combined heat and power (CHP), as one of the most common distributed energy technologies, not only can generate heat and power, but also efficiency of system can be increased up to 90%. Besides, the greenhouse gas (GHG) emissions and its related threatens can be reduced by almost 13-18% [4]. Planning and operating in the presence of CHP necessitates to study the issues such as high reliability and security in the supply of energy required for more coupled systems entitled "carrier energy systems" [5][6][7].…”

“…With the expansion of the above view and the need for multi-carrier energy systems (MCESs) about the role of this issue in the energy industry, the utilization of networks such as electrical, natural gas, and district heating networks is inevitable [4,10,11]. The main reason for implementing MCESs is to study the interactions of energy networks with each other, minimizing costs and consumer supply security [12,13].…”

Two-Stage Joint Optimal Scheduling of a Distribution Network With Integrated Energy Systems

“…It is necessary to adopt certain methods to improve the energy efficiency and ensure the reliable operation of the power system [3]. In this context, the integrated energy system (IES) under the fusion of a smart grid and energy network came into being [4]. The IES can effectively convert electricity, gas, heat, cold and other forms of energy in the energy hub to dynamically meet the energy needs of different users.…”