Doubly-fed wind power converter low-voltage traversing topological structure and control method thereof
A wind power converter and low voltage ride-through technology, which is applied in wind power generation, conversion of AC power input to AC power output, and conversion of AC power input to DC power output, etc. problem, to achieve the effect of increasing current carrying capacity, low cost of topology structure, and increasing current control capacity
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[0021] see figure 1 , the topological structure of low voltage ride-through of doubly-fed wind power converter in this embodiment is to adopt the voltage composed of the rotor-side converter M, the intermediate DC link, and the grid-side converter N for stabilizing the voltage of the intermediate DC link Source back-to-back converter structure, a triangular structure is set in the converter M on the rotor side, each branch in the triangular structure is connected in series by a bidirectional thyristor SCR and a resistor, and the three vertices in the triangular structure are respectively connected to the rotor side The three AC output points of the converter M are connected.
[0022] In a specific implementation, the resistance value of the resistor in the delta structure is zero or not zero, and the delta structure also includes other circuit structures with equivalent electrical performance.
[0023] The control method of the doubly-fed wind power converter low-voltage ride...
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