Fault ride-through method and system for wind power delivery system of flexible DC power grid
A flexible DC and system failure technology, applied in the electrical field, can solve problems such as too late to move, and achieve the effect of avoiding overload problems
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[0057] In order to better understand the present invention, the content of the present invention will be further described below in conjunction with the accompanying drawings and examples.
[0058] After the converter station on the wind power side of the flexible DC grid is blocked due to a fault, the current on the wind turbine side will drop rapidly due to the blockage of the sending channel, and the voltage of the collection system will increase; in addition, the wind speed can be considered constant in a short period of time, that is, the mechanical power of the wind turbine remains unchanged , since the active power of the wind turbine cannot be sent out, the electromagnetic power of the wind turbine drops sharply to zero. According to formula (1), the speed of the wind turbine will gradually increase. However, due to the short acceleration time and the wind turbine has a certain moment of inertia, the increase in speed is small.
[0059]
[0060] In the formula, Δω is ...
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