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A method based on second-order cone optimization algorithm for solving the optimal energy flow of an electrically interconnected integrated energy system

A comprehensive energy system and electrical interconnection technology, applied to electrical components, AC networks with the same frequency from different sources, circuit devices, etc., can solve problems such as slow solution speed and uncertainty of solution results

Inactive Publication Date: 2019-01-15
HOHAI UNIV
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Problems solved by technology

Although intelligent algorithms such as particle swarm and immune algorithm have strong global search capabilities, the solution results of these algorithms are uncertain and easy to converge to a local optimum
In addition, the model of the natural gas system is a highly non-convex nonlinear model. Although the natural gas flow can be solved by the method of solving the electric power flow, there are still many differences between the natural gas flow and the electric power flow.
The existing literature uses the unified Newton-Raphson method to analyze the flow of energy flow in the power network and natural gas network, but the solution speed is slow; there are strong dependencies between the various systems of the integrated energy system, and the analysis needs to be carried out under a unified framework

Method used

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  • A method based on second-order cone optimization algorithm for solving the optimal energy flow of an electrically interconnected integrated energy system
  • A method based on second-order cone optimization algorithm for solving the optimal energy flow of an electrically interconnected integrated energy system
  • A method based on second-order cone optimization algorithm for solving the optimal energy flow of an electrically interconnected integrated energy system

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Embodiment Construction

[0053] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0054] Such as figure 1As shown, the method for solving the optimal energy flow of the electrical interconnection comprehensive energy system based on the second-order cone optimization algorithm described in the present invention, specifically operates according to the following steps:

[0055] (1) Steady-state modeling of the power system model;

[0056] For the power system power flow model of radial distribution network, its power equation can be expressed as:

[0057]

[0058] in:

[0059]

[0060] In the formula, P ij , Q ij is the active power and reactive power flowing through the head end of the branch ij in the tth period of the day; I ij is the current flowing through the branch ij; R ij 、X ij is the resistance and reactance of branch ij; a(j) is the first node set with j as the tail node, b(j) is the t...

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Abstract

The invention discloses a method for solving the optimal energy flow of an electrically interconnected integrated energy system based on a second-order cone optimization algorithm. Firstly, an electrically interconnected integrated energy system model composed of an electric power system, a natural gas system and an energy hub is established. Then, the integrated energy system model is transformedinto a convex model which is easy to solve. Then, cut sets are introduced into power system and natural gas system respectively to ensure that the obtained solution is the optimal solution of the original problem. Finally, an example is given to verify the correctness and effectiveness of the proposed algorithm. The invention obtains an efficient and fast optimization method for solving an optimization model of an integrated energy system, and provides support for the optimization operation of an electrically interconnected integrated energy system.

Description

technical field [0001] The invention belongs to the field of comprehensive energy systems, and in particular relates to a method for solving the optimal energy flow of an electrical interconnection comprehensive energy system based on a second-order cone optimization algorithm. Background technique [0002] Energy is the basis and important guarantee for human survival and the lifeline of the national economy. How to ensure sustainable energy supply while reducing environmental pollution is the focus of common concern in today's society. After years of energy construction, my country has reversed the phenomenon of power shortage, and other primary energy sources have also been developed accordingly. However, the supply of primary energy, the construction of new energy power generation systems, energy pipeline network planning, and energy management have all been carried out independently. The unbalanced and insufficient development of multiple energy sources is becoming mor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/06
CPCH02J3/00H02J3/06H02J2203/20
Inventor 孙永辉张博文瞿苏巍钟永杰许周
Owner HOHAI UNIV
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