Multi-point linearized probability energy flow method of integrated energy system with electricity converting to natural gas

A technology of integrated energy system and energy flow, which is applied in the field of uncertainty analysis and safety assessment of integrated energy system, can solve problems affecting the safety of gas network and achieve high computational efficiency

Active Publication Date: 2016-09-07
HOHAI UNIV
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Problems solved by technology

In fact, random disturbances in the grid can propagate to the gas grid thro

Method used

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  • Multi-point linearized probability energy flow method of integrated energy system with electricity converting to natural gas
  • Multi-point linearized probability energy flow method of integrated energy system with electricity converting to natural gas
  • Multi-point linearized probability energy flow method of integrated energy system with electricity converting to natural gas

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Embodiment Construction

[0052] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0053] 1 Energy flow model of electricity-gas interconnection integrated energy system

[0054] 1.1 Power flow model

[0055] The active and reactive power of the branches connecting nodes i and j can be expressed as:

[0056]

[0057] In the formula: P ij with Q ij are the active and reactive power of the branch ij respectively; V i with V j are the voltage amplitudes of nodes i and j respectively; θ ij is the voltage phase angle difference between node i and j...

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Abstract

The invention discloses a multi-point linearized probability energy flow method of an integrated energy system with electricity converting to natural gas. The method includes the following steps: firstly proposing an energy hub model containing wind electricity, thermoelectricity combined supply, and electricity converting to natural gas; then conducting quantitative analysis on precision of linearized energy flow equations of a power grid and a natural gas net, and subsequently making a conclusion that the precision of the linearized energy flow of the natural gas net is explicitly lower than that of the power grid. Based on the conclusion, the invention provides a method for calculating the multi-point linearized energy flow. At the same time, the method takes into consideration of the relativity between electricity, natural gas and thermal load and wind velocity, and based on a probability density distribution function of undetermined energy flow injection, adopts the monte carlo simulation method in generating random samples. For each random sample, the method adopts the multi-point linearization method in calculating the energy flow. According to the invention, the method has high calculation efficiency, and at the same time has linearization errors which are within an acceptance scope.

Description

technical field [0001] The invention relates to a multi-point linear probability energy flow method for a power-to-gas comprehensive energy system, which belongs to the technical field of uncertainty analysis and safety assessment of the comprehensive energy system. Background technique [0002] In recent years, the installed capacity of gas turbines and the proportion of power generation have increased year by year, and the coupling between the power system and the natural gas system will be gradually strengthened. At the same time, the fast response characteristics of gas turbines can be used to stabilize the fluctuations of large-scale renewable energy. Therefore, from the perspective of promoting the integration of renewable energy into the grid, priority should be given to the installation of gas turbines. When the gas turbine is used to stabilize the output fluctuation of renewable energy, the equivalent gas load of the gas turbine (the gas turbine is equivalent to the...

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
Inventor 卫志农陈胜孙国强孙永辉臧海祥陈霜张思德
Owner HOHAI UNIV
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