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Correlation-considered GEPOPF calculation method

An interconnected system and optimal power flow technology, applied in computing, system integration technology, information technology support system, etc., can solve the problem of affecting the stable operation of the power system, the OPF model ignores the consideration of the natural gas system, and there is no consideration of the uncertainty of the natural gas network in the power system and other issues to achieve the effect of ensuring safe operation

Inactive Publication Date: 2015-10-28
HOHAI UNIV
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Problems solved by technology

In fact, the natural gas network is subject to constraints such as gas storage capacity, pipeline capacity, and pressure, so the operating status of the natural gas network will affect the stable operation of the power system to a certain extent.
In addition, the existing research on the electricity-gas interconnection system is based on a deterministic model, and does not consider the uncertainty of the power system and the natural gas grid under the background of new energy access.
The natural gas grid and the power grid also have a certain correlation, ignoring the correlation will lead to inaccurate optimization results
[0004] The traditional OPF model ignores the consideration of the natural gas system, and under the situation that new energy sources are continuously connected to the grid, it is urgent to establish a GEPOPF (Combined Natural Gas and Electric Probabilistic Optimal Power Flow, Power System Probabilistic optimal power flow (POF) model interconnected with natural gas system and its solution method

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  • Correlation-considered GEPOPF calculation method
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  • Correlation-considered GEPOPF calculation method

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[0017] The technical solutions of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention, but the examples cited are not intended to limit the present invention.

[0018] The calculation method of the probabilistic optimal power flow of the electricity-gas interconnected system that takes into account the correlation includes the following steps:

[0019] Step 1: Establish a steady-state model of the natural gas system according to the fluid characteristics of natural gas;

[0020] Step 2: Establish the coupling relationship between the power system and the natural gas system through the gas turbine: take the minimum integrated operating cost of the interconnected system as the objective function to establish the optimal power flow model of the electricity-gas interconnected system;

[0021] Step 3: In view of the er...

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Abstract

The invention discloses a correlation-considered GEPOPF (Combined Natural Gas and Electric Probabilistic Optimal Power Flow) calculation method. The lowest total operation cost of an interconnection system is used as an optimization control objective; the safety of an electric system and the safety of a natural gas system are considered; the influence of random factors is considered in an optimization process; the correlation among random variables is considered; and through the probabilistic OPF (Optimal Power Flow) calculation, the probability statistics information of the state variables and an objective function is obtained.

Description

Technical field [0001] The invention relates to a method for calculating the probability optimal power flow of an electricity-gas interconnection system in consideration of correlation. Background technique [0002] As a bridge from fossil energy to new energy, natural gas has the advantages of: 1) abundant resources; 2) clean and efficient; 3) economy; 4) fast adjustment speed, can be used for emergency peak shaving, and the randomness of renewable energy. Coordinate intermittently. With the large-scale development of unconventional natural gas worldwide, it is foreseeable that natural gas will have a huge application prospect in the power system in the future. The future energy Internet will be the product of the highly coupled power system and natural gas network. [0003] Optimal Power Flow (OPF) is an important tool for power system operation and planning. Due to the small proportion of gas turbine units in the power system at this stage in my country, traditional OPF general...

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Application Information

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IPC IPC(8): G06Q50/06
CPCY02E40/70Y04S10/50
Inventor 陈霜孙国强卫志农陈胜李逸驰
Owner HOHAI UNIV
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