Comprehensive energy system flexibility evaluation method based on heat supply network regulation optimization

Abstract

The invention belongs to the field of energy evaluation, and particularly relates to a comprehensive energy system flexibility promotion measure evaluation method based on heat supply network regulation optimization. The method comprises the steps of constructing an optimization solution model of a centralized heat supply network in different regulation modes, constructing a comprehensive energy system flexibility evaluation index system based on heat supply network regulation optimization, and evaluating heat supply network flexibility promotion measure by subjectively and objectively combining a network analysis method-entropy weight method with empowerment. Compared with an existing method, the method takes heat supply network regulation optimization as a research starting point, more emphasis is paid to mining of potential flexible resources in the dispatching operation process of the integrated energy system, the reliability, economy and safety of the system are considered at the same time, the flexibility promotion mechanism of the heat supply network to the integrated energy system can be revealed, the operation characteristic of source-load interaction is enhanced, and therefore, the flexibility provided by the heat supply network in different adjusting modes is comprehensively and quantitatively evaluated, and more consumption of high-proportion renewable energy sources is realized.

Description

technical field [0001] The invention belongs to the field of energy evaluation, and more specifically, relates to a method for evaluating the flexibility of a comprehensive energy system based on heat network adjustment and optimization. Background technique [0002] In the face of the urgent realization of the country's major strategic needs for efficient utilization of energy, the development of an integrated energy system with a high proportion of renewable energy integration will become one of the key directions to promote energy technology change and energy transformation development. Due to the strong thermoelectric coupling characteristics of the integrated energy system centered on cogeneration units, and with the gradual increase in the proportion of intermittent renewable energy and the impact of load fluctuations, the integrated energy system faces insufficient flexibility and low reliability. series of questions. [0003] In recent years, as the country attaches...

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Problems solved by technology

[0004] However, most of the existing research focuses on improving the flexibility of the system from the perspective of energy conversion, and there are fewer studies from the perspective of energy transportation.

Since the modeling of the central heating network involves complex conditions such as nonlinearity, non-convexity, and high dimensionality, many studies have focused on modeling in the variable temperature-constant flow adjustment mode to simplify the heat transport process. Regarding other The optimization model of the central heating network under the adjustment mode is rarely discussed; the research on the complex linear conditions of the central heating network is partially discussed, because there is no suitable solution method, the results obtained are not ideal

In addition, the existing research mainly focuses on the impact of the operation optimization of the central heating network on the performance improvement of the integrated energy system, and indirectly discusses its improvement effect on flexibility (qualitative evaluation). There are few literatures on the effect of improving flexibility (quantitative evaluation), and there are fewer quantitative evaluations on the effect of improving the flexibility of integrated energy systems by integrating the operation optimization under different regulation modes of the district heating network

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