Method and device for suppressing oscillation of multi-feeder alternating-current/direct-current flexible interconnection system
An interconnected system, AC and DC technology, applied in the parallel operation of DC power supply, reducing/preventing power oscillation, etc., can solve the problems of poor suppression ability and inability to suppress interval oscillation, achieve suppression of interval oscillation, improve overall suppression ability, and facilitate access Effect
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Embodiment 1
[0061] Embodiment 1 of the present invention provides a method for suppressing oscillation of a multi-feeder AC-DC flexible interconnection system, the specific flow chart is as follows figure 1 As shown, the specific process is as follows:
[0062] S101: Determine a preset additional oscillation damping control instruction of the additional damping controller based on the acquired active power deviation and reactive power deviation of line transmission;
[0063] S102: Determine the current reference value of the multi-feeder AC-DC flexible interconnection system based on the additional oscillation damping control command, the measured active power value and the measured reactive power value of the multi-feeder AC-DC flexible interconnection system;
[0064] S103: Determine the voltage reference value of the multi-feeder AC-DC flexible interconnection system based on the current reference value of the multi-feeder AC-DC flexible interconnection system;
[0065] S104: Suppress...
Embodiment 2
[0086] Based on the same inventive concept, embodiment 2 of the present invention also provides a multi-feeder AC-DC flexible interconnection system oscillation suppression device, including:
[0087] The first determination module is used to determine the preset additional oscillation damping control instruction of the additional damping controller based on the acquired active power deviation and reactive power deviation of line transmission;
[0088] The second determination module is configured to determine the current reference value of the multi-feeder AC-DC flexible interconnection system based on the additional oscillation damping control command, the measured active power value and the measured reactive power value of the multi-feeder AC-DC flexible interconnection system;
[0089] The third determination module is configured to determine the voltage reference value of the multi-feeder AC-DC flexible interconnection system based on the current reference value of the mul...
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