New energy station impedance calculation method

By using clustering algorithms and equivalent simulation models, new energy power units are divided into clusters, their equivalent impedance characteristics are calculated, and key parameters are optimized. This solves the problem of impedance modeling and stability analysis for large-scale new energy power plants, and achieves efficient impedance calculation and stability assessment.

CN121395358APending Publication Date: 2026-01-23ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD +1
0 Cites 0 Cited by

Patent Information

Application Number
CN202511218387.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-28
Publication Date
2026-01-23

AI Technical Summary

Technical Problem

Traditional simulation methods suffer from high-dimensional and ill-conditioned numerical problems in large-scale new energy power plants, making it difficult to achieve refined impedance modeling and stability characteristic analysis of the entire plant.

Method used

Clustering algorithms are used to divide new energy generating units into several clusters, calculate the equivalent impedance characteristics of each cluster, construct equivalent frequency domain network equivalent FDNE units, determine key parameters by optimizing the objective function, construct a full-field equivalent simulation model, and calculate the equivalent impedance characteristics of the power station grid connection point.

Benefits of technology

It effectively solves the computational challenges caused by the large number of generating units, complex characteristics, and variable topology of large-scale new energy power plants, and achieves a significant improvement in computational efficiency while ensuring modeling accuracy, providing a reliable data foundation for broadband oscillation stability analysis and suppression strategies at the power plant level.

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

Abstract

The invention is suitable for the technical field of impedance calculation, and provides a new energy station impedance calculation method, which comprises the following steps: inputting acquired broadband impedance characteristic data into a preset clustering algorithm model for clustering analysis, and generating a plurality of unit clusters; calculating an equivalent impedance characteristic of the current cluster, and determining an equivalent frequency domain network equivalent FDNE unit corresponding to the current cluster according to the equivalent impedance characteristic; constructing a function taking maximization of a stability margin and minimization of a harmonic distortion rate as optimization targets, and solving an optimal solution set of the function by taking key parameters of each equivalent FDNE unit of the equivalent frequency domain network as optimization variables; according to the actual electrical topology of the new energy station, the optimized FDNE units are connected, and a full-field equivalent simulation model is constructed; calculating the equivalent impedance characteristic of the grid-connected point of the new energy station through a full-field equivalent simulation model; the calculation efficiency is greatly improved on the premise of ensuring the modeling precision.
Need to check novelty before this filing date? Find Prior Art