Damping controller for restricting secondary synchronous oscillations and control method thereof
A sub-synchronous oscillation and damping controller technology, applied in the automatic control of power, impedance network, DC circuit can reduce harmonics/ripples, etc., can solve problems such as shafting damage, equipment property loss, etc., to suppress risks, Achieve simple and easy effects
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[0020] The principle diagram of the present invention is as follows figure 1 As shown in the figure, the damping controller for suppressing subsynchronous oscillation of the present invention includes a low-pass filter module 1 for filtering out high-frequency components in a signal, a phase-locked loop module 2 for obtaining a stable signal, and a subsynchronous extraction for the processed signal. Band-pass filter module 3 for oscillating frequency-related components, and phase-shift module 4 for phase-shift processing of sub-synchronization frequency-related components, wherein the input end of low-pass filter module 1 is to collect the AC bus voltage of the converter station as the input quantity of the controller signal , the input end of the phase-locked loop module 2 is connected to the output end of the low-pass filter module 1, the output end of the phase-locked loop module 2 is connected to the input end of the band-pass filter module 3, and the inp...
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