Method for improving adaptive variable gain fast response phase-locked loop
A fast-response, phase-locked loop technology, applied in the direction of automatic power control, electrical components, etc., can solve the problems of small bandwidth, slow dynamic response speed, increase of transition time of the phase-locked loop system, etc., to reduce nonlinearity, The effect of improving dynamic response speed and increasing bandwidth
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[0042] In order to make the experimental purpose and advantages of the present invention clearer, the following structural drawings illustrate further detailed explanations: figure 1 Is the structure diagram of the phase-locked loop, the first is the three-phase voltage u a , u b , u c Converted by Clarke transform to u α , u β , and then use the Park transform to convert u α , u β converted to u d , u q
[0043]
[0044]
[0045] 1, is the output angle feedback of the phase-locked loop, θ is the phase A grid voltage angle, is the angular deviation; ,in is the voltage vector magnitude in the synchronous coordinate system.
[0046] In the nonlinear mathematical model, the phase identification link uses
[0047] way, so there is a nonlinear part in the system model: , which exists in the system forward pass. According to the nonlinear model of the phase-locked loop, the open-loop transfer function of the system is obtained, and the formula...
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