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Dynamic energy flow calculation method for electric heating comprehensive energy system based on differential transformation

An integrated energy system and energy flow calculation technology, applied in the field of integrated energy system calculation and analysis, can solve problems such as poor robustness, non-convergence, and low efficiency, and achieve the effect of improving efficiency, ensuring convergence, and avoiding iterative calculation.

Pending Publication Date: 2022-03-22
SOUTHEAST UNIV +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, this solution is inefficient and prone to non-convergence under the influence of large disturbances, that is, poor robustness

Method used

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  • Dynamic energy flow calculation method for electric heating comprehensive energy system based on differential transformation
  • Dynamic energy flow calculation method for electric heating comprehensive energy system based on differential transformation
  • Dynamic energy flow calculation method for electric heating comprehensive energy system based on differential transformation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0179] Such as figure 2 As shown, a structural diagram of the heating system is provided. The system contains 225 nodes, 225 pipes, and includes a loop.

[0180] image 3 It is a structural diagram of the power system used in this embodiment. The system includes 118 busbars, one extraction and condensing unit connects the heat source node 1 of the heating system and the PV busbar 118 of the power system, and one gas turbine connects the heat source node 224 of the heating system and the balance busbar of the power system 1.

[0181] The proposed dynamic energy flow calculation method is verified in the matrix laboratory (MATLAB for short), and compared with the Newton-Raphson iterative method based on finite difference.

[0182] Simulations are carried out for the two cases where the temperature of the heat source of No. 1 node changes stepwise and the load of all nodes increases, and the calculation efficiency and robustness of the method of the present invention are veri...

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Abstract

The invention relates to the field of comprehensive energy system calculation and analysis, in particular to an electric heating comprehensive energy system dynamic energy flow calculation method based on differential transformation, which comprises the following steps: S1, defining differential transformation under a per unit value system; s2, applying the defined differential transformation to a nonlinear-partial differential-algebraic equation model of the dynamic energy flow of the electric heating integrated energy system, and converting the nonlinear-partial differential-algebraic equation model into a group of explicit linear recursive relational expressions; s3, by solving the relational expression, obtaining an expression of each state quantity about time, and further obtaining a change track of each variable of the model along with time; and S4, an adaptive time window strategy based on local truncation error estimation is used to accelerate the energy flow calculation process, the convergence of the calculation is ensured, and the efficiency and robustness of the energy flow calculation are improved. According to the method, efficient and robust calculation of the dynamic energy flow can be realized.

Description

technical field [0001] The invention relates to the field of calculation and analysis of integrated energy systems, in particular to a method for calculating dynamic energy flow of an electrothermal integrated energy system based on differential transformation. Background technique [0002] The coordinated operation of the power system and the heating system improves the operational flexibility and economy of the energy system, so it has become an important development direction of the future energy system. However, the coupling of the power system and the heating system has brought new challenges: on the one hand, the disturbance in one system will be transmitted to the other system through the coupling element, which increases the difficulty of system operation, analysis, and control; On the one hand, the difference in the time scale of the dynamic characteristics of the electrothermal system makes it difficult for the traditional static safety analysis method to be applie...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06G06F17/13
CPCG06Q10/06315G06Q50/06G06F17/13
Inventor 顾伟俞睿智陆海罗恩博陆帅张苏涵吴志周苏洋张浩
Owner SOUTHEAST UNIV
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