Electric power system operation reliability evaluation method and device based on chaotic polynomial

CN119624235APending Publication Date: 2025-03-14GUANGDONG POWER GRID CO LTD +1
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Patent Information

Application Number
CN202411706895.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-26
Publication Date
2025-03-14

AI Technical Summary

Technical Problem

The prior art evaluates the operating reliability of power systems, especially when uncertainties in wind power and photovoltaic power generation increase, has low computing efficiency and cannot update reliability indicators in real time, resulting in difficulty in system scheduling.

Method used

Using a method based on chaotic polynomial, the initial input variables such as the output power of the wind motor, the output power of the generator and the predicted load of the power system are obtained, and the equal probability conversion is carried out to construct a polynomial chaos expansion formula, and calculate the coefficients. The reliability analysis formula is used to determine the reliability index of the power system.

Benefits of technology

It realizes the calculation speed of the power system reliability indicators while ensuring calculation accuracy, solves the problem of difficulty in reliability evaluation and calculation under strong uncertainty of the power system, can update the system reliability indicators in real time, and supports the optimization scheduling of the power system.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention provides an electric power system operation reliability evaluation method and device based on a chaotic polynomial. The method comprises the following steps: acquiring initial input variables, wherein the input variables comprise wind turbine output power, generator output power and power system predicted load; performing standardization processing on the initial input variable according to an equal probability conversion principle to obtain a standard input variable obeying known probability distribution; and constructing a corresponding polynomial chaos expansion formula according to the distribution type of the standard input variable, calculating a coefficient of the polynomial chaos expansion formula, and determining a reliability index of the power system according to the coefficient by adopting a reliability analysis formula. According to the method, the analytic function relationship between the system reliability index and the wind power and load can be accurately established, the calculation speed of the reliability index of the power system can be improved on the premise of ensuring the precision, and the problem that the reliability evaluation calculation is difficult under the strong uncertainty of the current power system is solved.
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Citation Information

Patent Citations

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  • Power distribution network reliability dynamic evaluation method and system based on sparse chaos polynomial

    CN118052021A

  • Method and device for evaluating reliability of power system containing high-proportion renewable energy

    CN118691424A

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