Wind power plant sub-synchronous resonance suppression method based on parallel voltage source current converter
A technology of voltage source converter and resonance suppression, which is applied in the direction of flicker reduction of AC network, wind power generation, electrical components, etc., can solve the problems of crowbar circuit damage, off-grid, etc., and achieve the effect of fast oscillation divergence
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[0049] The present invention proposes a method for suppressing subsynchronous resonance of a wind power field based on a parallel voltage source converter. The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0050] figure 1 Shown is a flow chart of a wind farm subsynchronous resonance suppression method based on a parallel voltage source converter, including the following steps:
[0051] 1) Select a measurement point on the collection line of the wind power cluster to measure the current i of the tie line between the wind power cluster and the power grid A0 i B0 i C0 ;
[0052] 2) Using the tie line current i A0 i B0 i C0 According to the bandwidth requirements, design a low-pass filter for digital filtering to filter out harmonics of the second order and above, and then design a band-stop filter for digital filtering according to the bandwidth requirements to filter out power frequency compone...
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