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|1. (WO2017177585) SYNCHRONOUSLY ROTATING REFERENCE FRAME PHASE-LOCKED LOOP, AND TEST METHOD AND DEVICE THEREFOR|
|Title:||SYNCHRONOUSLY ROTATING REFERENCE FRAME PHASE-LOCKED LOOP, AND TEST METHOD AND DEVICE THEREFOR|
Disclosed are a synchronously rotating reference frame phase-locked loop, and a test method and device therefor. The phase-locked loop comprises: a reference transformation module set to, according to a phase angle fed back by a phase-locked tracking loop, convert a received network voltage signal to be under a d-q reference frame, and obtain a q-axis voltage error according to a pre-set q-axis voltage reference value; a fuzzy adaptive control module set to take the q-axis voltage error and/or a parameter reflecting a q-axis voltage error characteristic as an input amount, use a fuzzy control algorithm to obtain a control parameter adjustment amount of a controller of the phase-locked tracking loop, and output same to the controller; the phase-locked tracking loop set to take the q-axis voltage error as an input, track the phase of a grid under the control of the controller, and feed back the phase angle obtained through tracking to the reference transformation module. The phase-locked loop is a phase-locked loop combined with fuzzy adaptive control, and realizes quick and precise tracking for the phase of a grid by means of a controller of the fuzzy adaptive control phase-locked loop.