Stable evaluation and static control method for electro-thermal-gas integrated energy system

Abstract

The invention, which relates to the technical field of the integrated energy system, provides a stable evaluation and static control method for an electro-thermal-gas integrated energy system. The method comprises: S1, modeling is carried out on an electro-thermal-gas integrated energy system by means of combination of data driving and mechanism driving; S2, screening and correlation identification of abnormal data are carried out; S3, a stable evaluation method is implemented; to be specific, a calculation formula of a stability index is defined by taking power flow calculation of an energy flow and load reduction quantity and wind curtailment quantity calculation as priorities and using determination of exceeding the limit by the energy flow as an evaluation criterion and a system stability evaluation standard comparison table is provided; and S4, static control is carried out, so that a sub-system independent solution problem and a multi-system coordinated solution problem are solved. According to the invention, with the integrated energy system model established by combination of data driving and mechanism driving, prediction of the load changing situation and dual identification of abnormal data of the system are realized, so that stability evaluation and static controlling are carried out on the system accurately and reasonably.

Description

technical field [0001] The invention relates to the technical field of comprehensive energy systems, in particular to a method for stability evaluation and static control of an electric-heat-gas comprehensive energy system. Background technique [0002] At present, human beings are facing many global challenges, such as environmental pollution, global warming, oil crisis, etc. Traditional power grids can no longer meet modern energy needs. Therefore, the concept of Energy Internet was proposed, and an integrated energy system was derived from it. the concept of. The integrated energy system is a system that takes the power system as the core and realizes the full utilization of renewable energy by organically coordinating and optimizing the distribution, conversion, storage, and consumption of various energy sources such as electricity, gas, and heat. [0003] At present, the modeling of integrated energy systems mostly focuses on independent energy systems, ignoring the co...

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Problems solved by technology

[0003] At present, the modeling of integrated energy systems mostly focuses on independent energy systems, ignoring the coupling relationship between energy systems, and not considering the uncertainty of loads, and cannot comprehensively describe the energy flow between different systems and links. , and the impact of load changes on the system, so the constructed model has certain limitations

[0004] Moreover, most of the evaluation methods for the stability of integrated energy systems at this stage use clustering algorithms to identify abnormal data. Sometimes clustering algorithms alone cannot accurately identify abnormal data. to identify the coupling relationship

[0005] At the same time, the current evaluation methods for the stability of integrated energy systems hardly give specific evaluation indicators and a set of specific and feasible evaluation methods.

[0006] In addition, most of the static control strategies of integrated energy systems at the present stage focus on independent energy systems, without adopting the idea of ​​multi-system coordinated solution when the subsystems cannot solve the problem alone, and without considering the fact that the cost of solving the problem is limited. Situation, feasibility and comprehensiveness have certain problems

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