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Electricity-gas coupling system probability continuous power flow modeling and solving method

A gas coupling and power flow model technology, applied to electrical components, circuit devices, AC network circuits, etc.

Inactive Publication Date: 2018-09-11
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

At present, there have been extensive studies on the static security analysis of power systems, but with the high coupling of electrical-gas systems, there are few studies considering the static security and stability analysis of electrical-gas coupling systems. Therefore, it is necessary to study an electrical-gas system Probabilistic Continuous Power Flow Modeling for Coupled Systems and Its Solution

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  • Electricity-gas coupling system probability continuous power flow modeling and solving method
  • Electricity-gas coupling system probability continuous power flow modeling and solving method
  • Electricity-gas coupling system probability continuous power flow modeling and solving method

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Embodiment Construction

[0010] The present invention comprises the following steps:

[0011] Step 1: Establish a probabilistic continuous power flow model for the electric-gas coupling system;

[0012] The present invention studies the uncertainty of wind farm output, and uses a two-parameter Weibull distribution model to describe the random variation law of wind speed v, and the output power P of wind power generator W . The modeling of wind turbines has been widely studied, and the present invention will be directly applied, and the details will not be repeated.

[0013] The following formula represents the wind power electric-pneumatic coupling system with parameters and power flow equations:

[0014]

[0015] In the formula, P Gi ,P Li , Q Gi , Q Li Represent the active power, active load, reactive power and reactive load from the generator at the initial point respectively; V i , θ i respectively represent the node voltage and node phase angle; A is the branch node correlation matrix ...

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Abstract

The invention discloses an electricity-gas coupling system probability continuous power flow modeling and solving method, relates to the field of safe and stable operation of a multi-energy flow system. The method includes the following steps: establishing an electricity-gas coupling system probability continuous power flow model; and applying a prediction-correction method to gradually approach acritical operating point of a system to calculate a maximum load margin of a power network and a natural gas network in the electricity-gas coupling system. The research conclusion can be applied tothe electricity-gas coupling system of an electric power system containing wind power, through analysis and calculation of the maximum load margin of the power network and the natural gas network, theproblem of a wind power plant access system in static safety stability of the electricity-gas coupling system can be solved, and necessary reference information can be provided for related operationdecision-makers. The method provided by the invention adapts to the development trend of energy interconnection, and can ensure the safe, efficient and environment-friendly operation of the multi-energy flow system.

Description

technical field [0001] The invention relates to a probabilistic continuous power flow modeling of an electric-gas coupling system and a solution method thereof, belonging to the field of safe and stable operation of multi-energy flow systems. Background technique [0002] In the context of energy interconnection, the coupling between power systems and natural gas systems is continuously strengthened, and the demand for energy such as electricity and natural gas is increasing day by day. As a renewable and clean energy, wind power is widely used in regional power generation. However, due to the influence of wind speed on the active output of wind turbines, it has the characteristics of randomness and uncertainty. In order to ensure the safe, efficient and stable operation of the multi-energy flow system, in the In the static safety and stability analysis of the electric-pneumatic coupling system of the wind power system, the analysis of wind power uncertainty and the probabil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00H02J2203/20
Inventor 马瑞秦佳倩颜宏文
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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