Active phase-controlled converter and control method and control system thereof, active phase-controlled converter system, high-voltage direct-current power transmission system, electronic device, storage medium and computer program product
By designing the main and auxiliary circuits of the active phase-controlled converter, problems such as commutation failure and small device capacity in DC transmission systems were solved, improving reliability and efficiency, reducing costs, and achieving stability and reactive power optimization in high-voltage DC transmission.
Patent Information
- Application Number
- CN202510061635.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing DC transmission systems are prone to commutation failures under multiple infeed conditions. Existing converters suffer from problems such as small device capacity, high cost, high loss, complex structure and low reliability. Furthermore, the utilization rate of surge arresters is low and the minimum turn-off angle cannot be effectively controlled, resulting in a large amount of reactive power consumption.
An active phase-controlled converter is adopted, including a main circuit and an auxiliary circuit. By controlling the lower arm of the bridge arm circuit to conduct in reverse and the auxiliary circuit to conduct with a negative voltage, a current is formed in parallel with the commutation bridge arm. The commutation voltage is provided by the full-bridge circuit, reducing the dependence on AC voltage and realizing active phase control capability. Furthermore, by combining bidirectional semi-controlled switches and fully controlled switches, the number of fully controlled devices is reduced and the utilization rate of surge arresters is improved.
It improves the reliability and efficiency of the converter, reduces costs, reduces reactive power consumption, achieves decoupled control of active and reactive power, and enhances the stability of high-voltage direct current transmission.
Smart Images
Figure CN122419230A_ABST