Accident chain model generation method of multi-energy flow system cascading failure development path

Abstract

The invention relates to an accident chain model generation method of a multi-energy flow system cascading failure development path, and belongs to the field of multi-energy flow coupled system faultanalysis research. The method comprises the following steps that the element composition situation and a topological structure of a multi-energy flow system are acquired as original data; the multi-energy flow system cascading failure development path taking a combustion gas turbine as a core and taking a gas supply path failure as an important link is provided; for the above cascading failure development path, a multi-energy flow system cascading failure path Rk affecting the work of a coupling element combustion gas turbine is solved; and based on the multi-energy flow system gas supply path, an accident chain model of the multi-energy flow system cascading failure development path is generated. According to the accident chain model generation method of the multi-energy flow system cascading failure development path, the multi-energy flow system is taken as a research background, the coupling element combustion gas turbine of an electric power-natural gas system serves as a problem core, the gas supply path affecting the problem core is defined and solved to generate the cascading failure accident chain model of the multi-energy flow system, and the cascading failure generation and development of the multi-energy flow system are reasonably described and solved.

Description

technical field [0001] The invention belongs to the field of fault analysis and research of multi-energy flow coupling systems, and relates to a fault chain model generation method for the development path of multi-energy flow system chain faults. Background technique [0002] At present, the analysis of cascading failures is limited to the power system. However, with the interconnection of electric power, natural gas, and thermal systems to form a multi-energy flow system, the degree of coupling between systems continues to increase, and the coverage of multi-energy flow systems gradually expands. The state change or failure of a certain energy flow system may affect the safe and stable operation of other energy flow systems, and the impact may even cause serious accidents such as system breakdown and collapse. Therefore, the related research on cascading failures of multi-energy flow systems urgently need to be developed. [0003] In a multi-energy flow system, the power ...

AI Technical Summary

Problems solved by technology

The types of components are more abundant than circuit breakers and relay protection devices in traditional power systems, and the time constants of different energy systems are inconsistent. It is difficult to unify the physical characteristics of components in a deterministic method. A series of events triggered by the failure may also lead to the collapse of the entire multi-energy flow system

Among them, the gas turbine, the coupling element between the electricity and natural gas system, plays a more prominent role. On the one hand, it obtains unit fuel natural gas through the gas supply path of the natural gas system, and on the other hand, it converts the chemical energy of natural gas into electrical energy and injects it into the power system. If there is a failure, the evil impact on the system is immeasurable

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