A method to obtain the available transmission capacity of electricity-gas interconnected energy system

Abstract

The invention discloses a method of acquiring available transfer capacity of an electricity-gas interconnected energy system and provides a concept of a static safety domain of the electricity-gas interconnected energy system. By means of solution by the continuous power flow method, solved is the problem that the traditional method of acquiring available transfer capacity, making no consideration on primary energy supply of NGFPP (natural-gas fired power plants) and operation constraints of a natural gas system, may drive the operation state of the natural gas system to exceed the safety constraint, thus influencing primary energy supply of the NGFPP. Verification by the interconnected energy system composed of an IEEE 39-node power transfer system and a 20-node Belgium gas transfer system shows that the method is generally applicable, ensuring safety and reliability of primary energy supply of the NGFPP; meanwhile, ATCs (available transfer capacities) of different areas are analyzed with a uniform energy market, and greater economic benefit is brought to participants of the whole energy market at the premise of ensuring the safety of the interconnected energy system.

Description

technical field [0001] The invention relates to a method for obtaining the available power transmission capacity of an electric-gas interconnected energy system, belonging to the technical fields of analysis, optimization and market of an electric-gas interconnected energy system. Background technique [0002] The traditional generator sets that use non-renewable fossil fuels as primary energy have great environmental pollution and are difficult to adapt to the development needs of modern smart grids and a low-carbon society. In contrast, natural-gas fired power plants (NGFPP) with abundant natural gas reserves and natural gas as primary energy have the following advantages: 1) high power generation efficiency; 2) low carbon emissions; 3) action response block. Therefore, the proportion of NGFPP power generation has increased significantly in recent years, and the coupling between the power system and the natural gas system has continued to increase. At the same time, with ...

AI Technical Summary

Problems solved by technology

It is worth noting that the existing ATC acquisition method only takes into account the security constraints of the power system, and does not consider the operational constraints of the primary energy system-natural gas system

Especially when the proportion of NGFPP power generation is large, the large increase of NGFPP output power may force the operating state of the natural gas system to exceed the safety constraints (such as node pressure limit, pipeline flow limit), thus affecting the primary energy supply of NGFPP

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