Subsynchronous oscillation suppression system
By installing coupling transformers and subsynchronous oscillation suppressors on the connection lines between new energy power generation equipment and the power grid, the oscillation problem of new energy grid-connected equipment is detected and suppressed, thus achieving effective oscillation suppression and stable equipment operation.
Patent Information
- Application Number
- CN202511548394.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-28
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2045-10-28
AI Technical Summary
Existing technologies are insufficient to effectively suppress subsynchronous oscillations caused by grid-connected power generation equipment such as wind turbine converters and photovoltaic inverters under weak grid conditions.
By installing a coupling transformer and a subsynchronous oscillation suppressor on the connection line between the new energy power generation equipment and the power grid, the controller detects the subsynchronous oscillation frequency and constructs a virtual negative inductance through the coupling transformer to suppress the current subsynchronous oscillation.
It effectively suppresses subsynchronous oscillations, has simple control logic, is applicable to multiple new energy power generation devices, does not affect the LC filter parameters in the mid-to-high frequency band, and bypasses the suppressor to avoid interference when there is no oscillation.