A method and equipment for quickly and effectively suppressing wide frequency oscillation of a new energy power system

By identifying the oscillation modes of the power system and adaptively tuning the parameters of the filter device, it can be directly connected to the power system, solving the problem of complex controller control in existing technologies, achieving fast and effective broadband oscillation suppression, and improving the stability of the new energy power system.

CN122203221APending Publication Date: 2026-06-12HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Filing Date
2026-05-14
Publication Date
2026-06-12

AI Technical Summary

⚠Technical Problem

In existing power systems with a high proportion of power electronics connected to the grid, suppressing broadband oscillations requires complex controller parameter tuning or regulation, and the already packaged controller cannot be changed, lacking a simple and effective suppression method.

⚗Method used

By acquiring the small-signal disturbance response signal of the power system, the oscillation mode is identified and the parameters of the filter device, including the tunable filter structure and the damping structure, are adaptively tuned. The filter is then directly connected to the power system to filter out oscillation components other than the fundamental wave, thereby enhancing the damping ratio without affecting the fundamental wave.

🎯Benefits of technology

It achieves rapid and effective suppression of wideband oscillations without interfering with the controller or control loop, improves the small-signal stability of the system, simplifies the oscillation suppression process, and enhances engineering practicality and timeliness.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to the field of power system stability control and power electronic grid-connection technology, and discloses a method and equipment for quickly and effectively suppressing wide-frequency oscillation of a new energy power system. In view of the problem that a new type of power system containing a high proportion of new energy and power electronic equipment is prone to wide-frequency oscillation, the present application first collects system operation states, identifies information such as current oscillation modes based on a system identification method, and then adaptively sets parameters of a filter device installed, so that the filter device can provide additional compensation power in addition to fundamental power, thereby quickly and effectively suppressing complex wide-frequency oscillation occurring in the system. The filter device is mainly installed at an energy storage power station or a large-capacity new energy generator set or a key hub node of a power system, thereby improving the safety and stability of the new energy power system.
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