Abstract
In recent years, the increasing penetration level of renewable generation and combined heat and power (CHP) technology in power systems is leading to significant changes in energy production and consumption patterns. As a result, the integrated planning and optimal operation of a multi-carrier energy (MCE) system have aroused widespread concern for reasonable utilization of multiple energy resources and efficient accommodation of renewable energy sources. In this context, an integrated demand response (IDR) scheme is designed to coordinate the operation of power to gas (P2G) devices, heat pumps, diversified storage devices and flexible loads within an extended modeling framework of energy hubs. Subsequently, the optimal dispatch of interconnected electricity, natural gas and heat systems is implemented considering the interactions among multiple energy carriers by utilizing the bi-level optimization method. Finally, the proposed method is demonstrated with a 4-bus multi-energy system and a larger test case comprised of a revised IEEE 118-bus power system and a 20-bus Belgian natural gas system.
Highlights
In recent years, the organization patterns of the global energy systems have been greatly evolved with the rapid development and wide applications of renewable generation and energy storage technologies
When the integrated demand response (IDR) program is implemented in a multi-carrier energy (MCE) system, Smart energy hub (SEH) adjust the energy consumption of end users and control the internal converters and energy storage devices according to the broadcast energy prices to minimize the operating cost and the dissatisfaction level of energy consumers
A SEH modeling framework considering the inclusions of P2G devices, heat pumps, diversified storage devices and flexible loads is first proposed, and an optimized IDR scheme is designed on this basis to manage the demand side resources
Summary
The organization patterns of the global energy systems have been greatly evolved with the rapid development and wide applications of renewable generation and energy storage technologies. To the best of our knowledge, the coordinated scheduling of conventional thermal generation units, renewable energy sources and SEHs, as well as the integrated applications of power to gas (P2G) devices, heat pumps, multiple kinds of energy storages, flexible loads has not yet been systematically addressed in existing publications. In order to fully utilize potentials of the MCE system, the optimal operation strategy of interconnected electricity, natural gas and heat systems with diversified storage devices and IDRs is addressed in this work. The modeling framework of a SEH is extended with P2G devices, heat pumps, diversified storage devices equipped and IDR programs implemented On this basis, a bi-level optimization model is established to build a coordinated strategy for optimal operation of MCE systems including conventional thermal units, renewable energy resources and SEHs. The overall energy efficiency and the capability of accommodating fluctuant generation outputs from renewable energy sources are evaluated within the proposed modeling framework.
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