System and method for improving FRT (fault ride-though) capability of DFIG-WT (doubly fed induction generator based wind turbine) on basis of SFCL (superconducting fault current limiter) and SMES (superconducting magnetic energy storage)
A double-fed fan and fault ride-through technology, which is applied in the field of power system and automation, can solve problems such as limited effects, and achieve the effects of suppressing fluctuations, unbalanced power and electromagnetic torque oscillation, and efficient fault ride-through support
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[0041] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0042] This embodiment is achieved through the following technical solutions:
[0043] like figure 1 As shown, a system based on SFCL and SMES to improve the fault ride-through capability of DFIGs is based on typical DFIGs, and a resistive superconducting fault current limiter is installed on the stator side of DFIGs. A superconducting magnetic energy storage device is installed on the DC link via a bidirectional DC / DC converter. In the figure, RSC is the rotor-side converter, and GSC is the grid-side converter.
[0044] A fault ride-through method of DFIG based on SFCL and SMES, in order to limit the stator and rotor fault current, suppress the change of DFIG terminal voltage and DC link voltage during the fault ride-through period of DFIG, and at the same time stabilize the Unbalanced power and electromagnetic torque oscillations play an active ro...
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