Method and model for evaluating inertia characteristics of gas-heat system in comprehensive energy system

Abstract

The invention relates to the field of comprehensive energy systems, in particular to a method for evaluating inertial characteristics of a gas-heat system in a comprehensive energy system. The method comprises the following steps: respectively establishing a second-order transient model for representing a change relationship between natural gas tail end pressure and tail end flow and a first-order transient model for representing a change relationship between thermal load building indoor temperature and heat supply power of a heat supply network, and then uniformly regarding the natural gas tail end pressure and the thermal load building indoor temperature as inertia change parameters; the natural gas tail end flow and the heat supply network heat supply power are regarded as transient change parameters in a unified mode, a transient response model is obtained through unified solving, on this basis, the gas-heat inertia characteristics of the comprehensive energy system are analyzed in a unified mode. Meanwhile, the actual inertia change parameter constraint conditions of the comprehensive energy system are considered, refined modeling is further carried out, and the comprehensive energy system is obtained. The gas-heat inertia characteristics of the actual comprehensive energy system are evaluated. According to the method, the gas-heat inertia characteristics of the comprehensive energy system can be reasonably evaluated.

Description

technical field [0001] The invention relates to the field of integrated energy systems, in particular to an evaluation method and model for inertial characteristics of a gas-heat system in an integrated energy system. Background technique [0002] In recent years, due to the increasingly serious environmental pollution and energy crisis, the comprehensive energy system has developed rapidly. The interactive operation of electrical and thermal multi-energy systems in the integrated energy system can improve energy utilization efficiency and promote new energy consumption. At the same time, the multi-energy coupling of the integrated energy system makes it have multi-time scale characteristics. Among them, the slow dynamic The characteristics contain rich flexibility, which can fully tap the inertial characteristics of the gas-thermal system, and provide support for the safe and reliable operation of the comprehensive energy system through coordinated optimization. [0003] F...

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Problems solved by technology

On the one hand, the heat transmission pipeline is long, and there is a certain time difference in heat energy transmission; on the other hand, there is a temperature comfort range for users in the building with heat load, both of which play a certain buffer role and can help the system run safely and stably, but the existing research There are still deficiencies in the technology. The existing research has not fully explored the inertial characteristics contained in the gas-thermal system. Only general qualitative research has been carried out, and there is a lack of refined modeling and a unified analysis of the gas-thermal inertial characteristics. Therefore, the present invention An evaluation method and model for the inertial characteristics of the gas-heat system in an integrated energy system are proposed

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