A second-order generalized integrator structure based on frequency-locked loop and synchronization method of phase-locked loop
A second-order generalized integral and second-order generalized technology, which is applied to the second-order generalized integrator structure based on frequency-locked loop and the field of phase-locked loop synchronization, can solve problems such as the complexity of circuit frequency-locked loop, achieve good harmonic filtering ability, The effect of improving the phase-locking accuracy and improving the filtering ability
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[0037] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0038] refer to figure 1 , a second-order generalized integrator structure based on a frequency-locked loop provided for an embodiment of the present invention, the structure includes: a second-order generalized integrator 1, a frequency-locked loop 2 based on a second-order generalized integrator, and a feedback loop 3.
[0039] Wherein, the Second Order Generalized Integrator (SOGI for short) 1 is used to receive a voltage input signal of a single-phase grid, and output a first quadrature signal and a second quadrature signal.
[0040] Wherein, the voltage input signal includes an input voltage signal and an input frequency.
[0041] Wherein, the frequency-locked loop...
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