Method for controlling direct voltage of doubly-fed generator grid-side converter without phase-locked loop
A voltage control method and grid-side converter technology, applied in the direction of single-network parallel feeding arrangement, etc., can solve the problem of phase-locked loop affecting the dynamic characteristics of the control effect and so on
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[0035] In the existing technology, the traditional vector control technology usually adopts grid voltage orientation, virtual grid flux linkage orientation, etc., and achieves decoupling control of active components and reactive components in the dq rotating coordinate system through synchronous rotation transformation. The control of active component adopts double closed loop, the outer loop is the DC bus voltage loop, and the inner loop is the active current loop; the control of reactive component adopts single current loop, which is directly given as reactive current. The sine and cosine trigonometric functions sinθ_cosθ of the synchronous rotation angular frequency ω used for control and the angle θ used for rotation transformation are obtained through a software phase-locked loop or a hardware phase-locked loop PLL. The direct power control technology adopts a similar idea to the traditional vector control: the grid voltage orientation, the virtual grid flux linkage orient...
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