Deep and far sea wind power time-varying impedance model grid-connected analysis method based on time domain residual error method

By establishing a system of differential algebraic equations and a recursive coefficient matrix, dividing the time domain into sub-intervals, and using power series explicit operators and discrete Fourier transform, a time-varying impedance model was constructed and tuned. This solved the computational bottleneck and overfitting problem of deep-sea power systems, and achieved efficient and accurate grid-connected analysis of deep-sea wind power.

CN121457053AActive Publication Date: 2026-02-03EAST CHINA BRANCH OF STATE GRID CORP
2 Cites 1 Cited by

Patent Information

Application Number
CN202511276537.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-08
Publication Date
2026-02-03
Estimated Expiration
2045-09-08

AI Technical Summary

Technical Problem

Existing technologies face computational bottlenecks when dealing with large-scale deep-sea power systems, making it difficult to efficiently handle highly complex problems. They are prone to overfitting or misjudgment, and lack the decomposition of physical components, making it difficult to provide interpretable basis for engineering parameter tuning.

Method used

A system of differential-algebraic equations containing the impedance of large-capacity submarine cables and multiple nonlinear elements is established. A recursive coefficient matrix is ​​constructed, the global time domain is divided into multiple time domain sub-intervals, and a general analytical solution expressed by a power series explicit operator is used to solve the problem. The time-frequency domain spectrum results are generated by discrete Fourier transform, and a time-varying impedance model is constructed and tuned.

Benefits of technology

It significantly reduces microstep integration, improves computational efficiency, enhances characterization accuracy and adaptability, and rapidly captures changes in grid-connected stability in deep-sea areas, thereby improving the analysis accuracy and adaptability of the deep-sea wind power grid-connected control system.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a deep and far sea wind power time-varying impedance model grid connection analysis method based on a time domain residual error method, relates to the technical field of power system modeling simulation, and can efficiently and accurately analyze deep and far sea wind power grid connection. The method comprises the following steps: establishing a differential algebraic equation set containing high-capacity submarine cable impedance and a plurality of nonlinear links, and constructing a recursive coefficient matrix; dividing a preset global time domain into a plurality of time domain subintervals, and solving the recursion coefficient matrix in each time domain subinterval by referring to a universal analytic solution represented by a power series explicit operator to generate a global time domain explicit solution corresponding to the preset global time domain; performing discrete Fourier transform on the global time domain explicit solution to obtain a time-frequency domain spectrum result; and constructing a time-varying impedance model according to the differential algebraic equation, setting the time-varying impedance model by adopting a time-frequency domain spectrum result, and analyzing the deep and far sea wind power grid-connected control system by utilizing the set time-varying impedance model.
Need to check novelty before this filing date? Find Prior Art