DSP-based low-voltage ride-through area general judgment method
A low-voltage ride-through and area technology, applied in photovoltaic power generation, wind power generation, electrical components, etc., can solve the problems of increasing the difficulty of judging low-voltage ride-through areas, different and complex low-voltage ride-through times, and achieve self-adaptive adjustment capabilities Strong, versatile, and easy to transplant
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[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention.
[0020] Although national standards have not yet unified the regulations on the low voltage ride through area, its basic shape has figure 1 with figure 2 The two shown. among them, figure 1 The low voltage ride through area shown contains zero voltage, which is more demanding, and figure 2 The low voltage ride through area shown does not include the zero voltage part. in figure 1 with figure 2 Among them, the abscissa is the time, and the ordinate is the unit value u of the grid-connected point voltage. The unit is standardized by the rated voltage. That is, when the grid-connected point voltage is equal to the rated voltage, its value is u=1. When u When At 0...
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