A Fault-Tolerant Control Method, System, Device, Medium and Product for Active Power Filter

By building an observer and using the extended Kalman filtering algorithm and second-order generalized integrator, fault-tolerant control of the grid voltage, inverter output current and DC-side voltage sensor of the active power filter is solved, and the system instability caused by sensor failure is improved, and the accuracy and reliability of the system are improved.

CN119742788BActive Publication Date: 2025-07-08FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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Patent Information

Application Number
CN202510259508.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-03-06
Publication Date
2025-07-08
Estimated Expiration
2045-03-06

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Abstract

The present invention relates to the technical field of power filters, and discloses a fault-tolerant control method, system, device, medium and product for an active power filter. After determining the type of the faulty sensor of the active power filter, the method constructs an observer for the faulty sensor by using the type of the faulty sensor, outputs an observed value through the observer, and performs fault-tolerant control on the faulty sensor through the observed value. Thus, without changing the modulation strategy, fault-tolerant control is performed on the grid voltage sensor, the inverter output current sensor, and the DC-side voltage sensor, improving the accuracy of the fault-tolerant control of the active power filter and ensuring the stable operation and reliability of the system of the active power filter.
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Citation Information

Patent Citations

  • Orthogonal filter-based inverter non AC voltage sensor control method

    CN104158215A

  • Pulse rectifier sensor fault tolerance control method based on slip-form observer

    CN106160533A

  • Active damping optimization-based inverter current-sensor-free control strategy

    CN115642633A