Layered decoupling optimal load reduction method for electrical and thermal integrated energy system

Abstract

The invention relates to a layered decoupling optimal load reduction method for an electrical and thermal integrated energy system, which is technically characterized by comprising the following stepsof: 1, inputting data of the integrated energy system, and setting and initializing related parameters of a model; 2, solving a scheduling optimization result of an energy concentrator in the outer layer of the layered decoupling optimization model, and further correcting the load of each energy subsystem in the inner layer of the model; 3, respectively calculating the optimal load reduction quantity of the electric heating subsystem, and correcting the input upper limit of the energy concentrator in the outer-layer model based on the optimal load reduction quantity; and 4, carrying out loopiteration on the steps 2 and 3 until the result converges or reaches the maximum number of iterations. According to the invention, the existing mature optimal power flow solving method is utilized toindependently solve each energy subsystem; and the energy coupling equation is solved based on the energy concentrator, and the optimal load reduction problem of the comprehensive energy system is converted into the optimal power flow problem of a single system, so that the complexity of the original problem is greatly reduced, and the calculation efficiency, stability and practicability are remarkably improved.

Description

technical field [0001] The invention relates to a calculation method for an optimal load reduction amount of an integrated energy system. In particular, it relates to a layered decoupling method for optimal load reduction in an electric-thermal comprehensive energy system. Background technique [0002] With the increasingly serious problems of environmental pollution and climate change, the global energy field is setting off the most profound and extensive revolution in history. The traditional power system is difficult to adapt to the new energy supply and demand pattern and development trend. The integrated energy system (Integrated Energy System, IES) will become the main energy bearing form of human society in the future. The integrated energy system couples multiple energy subsystems, and uniformly plans and dispatches the processes of generation, transmission, conversion, and distribution of multiple energy sources, so as to meet the diverse needs of the demand side, ...

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Problems solved by technology

[0004] The optimal load reduction algorithm can be used to quantitatively calculate the optimal load reduction under the fault state of the integrated energy system. The current research mostly adopts the unified solution method, which integrates the flow process and energy conversion process of each subsystem to establish the optimal load reduction model, but the equation of the model is often non-convex, the Jacobian matrix is ​​singular, the algorithm is difficult to converge, and the calculation results are difficult to guarantee the global optimum

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