Control method, device, medium, product and power supply system of inverter

CN122052560BActive Publication Date: 2026-06-26HAIER ENERGY TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-04-17
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Traditional inverters struggle to adapt to dynamic time-varying characteristics in weak grid environments, leading to impedance mismatch and system resonance. Existing improvement solutions are costly and lack practical engineering applications, failing to balance system stability and dynamic response speed due to the absence of real-time sensing and dynamic switching mechanisms.

Method used

By acquiring voltage signals from the power grid and the inverter output side, multiple sets of feedforward signals are generated, including hybrid filtered signals and fundamental component signals. The control strategy is dynamically switched according to the rate of change of voltage signals and harmonic distortion rate. A predictive model is used to predict grid fluctuations, thereby realizing real-time adjustment of inverter parameters.

Benefits of technology

It effectively suppresses harmonics while responding quickly to power grid fluctuations, improves the robustness of the system under weak power grids, resolves the contradiction between stability and response speed, and reduces hardware modification costs.

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Abstract

Embodiments of the present application provide a kind of control method, device, medium, product and power supply system of inverter. Applied to power supply system, power supply system includes load, power grid and inverter, load and power grid are used to realize energy transmission by inverter, comprising: obtaining the first voltage signal of power grid and the second voltage signal of inverter output side;Based on the first voltage signal, generate multiple groups of feedforward signal;Based on the rate of change of first voltage signal, the harmonic distortion rate of second voltage signal, in the case where the rate of change of first voltage signal reaches preset rate of change threshold, using first voltage signal to carry out the parameter control of inverter;In the case where the rate of change of first voltage signal does not reach preset rate of change threshold, based on the harmonic distortion rate of second voltage signal and preset distortion rate threshold, using fundamental component signal or hybrid filter signal to carry out the parameter control of inverter. To realize real-time switching control strategy, while inhibiting harmonic in fast response power grid fluctuation.
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Citation Information

Patent Citations

  • Grid-connected inverter control method for special minor component feedforward of power grid voltage

    CN110233494A

  • Control method for suppressing voltage distortion at grid-connected point

    CN110544956A