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Electric-thermal interconnected comprehensive energy system risk assessment method based on cross entropy and objective entropy weight method

A comprehensive energy system and risk assessment technology, which is applied in the field of risk assessment of electric-thermal interconnected comprehensive energy systems based on cross-entropy and objective entropy weight method, can solve problems such as increased risk level of system operation, increased randomness of load and wind power, etc.

Pending Publication Date: 2020-06-05
HOHAI UNIV
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Problems solved by technology

[0004] Purpose of the invention: The purpose of the present invention is to provide an integrated electricity-heat interconnection system based on cross-entropy and objective entropy weight method in order to solve the problem that the load of the current electric-thermal interconnection integrated energy system and the aggravation of wind power randomness lead to an increase in the risk level of the system operation. Energy system risk assessment method, which takes into account the impact of wind power and electric-heat load fluctuations on the system, and can effectively evaluate the comprehensive risk level of electric-heat interconnected integrated energy systems

Method used

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  • Electric-thermal interconnected comprehensive energy system risk assessment method based on cross entropy and objective entropy weight method
  • Electric-thermal interconnected comprehensive energy system risk assessment method based on cross entropy and objective entropy weight method
  • Electric-thermal interconnected comprehensive energy system risk assessment method based on cross entropy and objective entropy weight method

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Embodiment Construction

[0080] The present invention will be further clarified below in conjunction with the drawings and specific embodiments.

[0081] This embodiment applies the method of the present invention to an electric-heat integrated energy system, such as figure 1 As shown, the specific calculation method steps are as follows:

[0082] S1: Establish an electric-heat integrated energy system model, including the following models:

[0083] Hydraulic model:

[0084] Its specific modeling includes the following equations:

[0085]

[0086] Bh f = 0

[0087]

[0088] In the formula, A is the network incidence matrix; Is the pipe flow of the heating network; Is the node inflow load flow; B is the loop correlation matrix; h f Is the pipeline pressure drop caused by friction loss; K is the pipeline resistance coefficient;

[0089] Thermal model:

[0090] The constraint equations of the thermal model include thermal load power equation, pipe temperature drop equation and nodal power conservation equation, as...

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Abstract

The invention discloses an electric-thermal interconnected comprehensive energy system risk assessment method based on cross entropy and an objective entropy weight method. The method comprises the following steps: S1, establishing an electric-thermal interconnected comprehensive energy system power flow model; s2, establishing a random probability density function of the electric-thermal load andthe new energy output by adopting a Gaussian mixture model; s3, calculating the risk level of each index of the electric-thermal interconnected comprehensive energy system based on a cross entropy method; s4, calculating the weight of each index based on the objective entropy weight; and S5, multiplying the risk index and the weight of each index to obtain a system operation comprehensive risk assessment index. The risk index evaluation method can effectively process the risk index evaluation problem of the electric-thermal interconnected comprehensive energy system under the influence of input variable randomness, has the advantages of being accurate and practical, and has certain guiding significance for safe and stable operation of the comprehensive energy system.

Description

Technical field [0001] The invention belongs to the field of operation and safety analysis of an electric-heat interconnected integrated energy system, and particularly relates to a risk assessment method of an electric-heat interconnected integrated energy system based on cross entropy and objective entropy weight method. Background technique [0002] With the rapid development of society leading to a shortage of fossil energy, a comprehensive energy system that combines electricity, gas, heat, hydrogen and other energy systems has been continuously developed. Especially in recent years, with the gradual application of electric-heat cogeneration units, the electric-heat integrated energy system has developed rapidly. Since wind power and other strong random new energy sources are connected to the system, a series of safety and stability problems such as over-limit voltage and over-limit pipeline flow will appear. Therefore, it is necessary to effectively and quickly deal with th...

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Application Information

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IPC IPC(8): G06F17/18G06Q10/06G06Q50/06
CPCG06F17/18G06Q10/0635G06Q50/06Y02P90/82
Inventor 卫志农廖星星滕德红孙国强臧海祥朱瑛
Owner HOHAI UNIV
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