Method for improving failure recovery characteristics of large-scale wind electricity through direct current outgoing system
An external transmission system and fault recovery technology, applied in the field of power system, can solve the problems of grid voltage reduction, aggravation of grid voltage drop, reduction of power grid output at the sending end, etc., so as to shorten the recovery time, improve the fault recovery characteristics, and improve the recovery characteristics. Effect
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[0022] Such as Figure 4 As shown, a method for improving the fault recovery characteristics of a large-scale wind power transmission system via direct current, the method includes the following steps:
[0023] (1). Judging the grounding short circuit fault of the AC power grid, if it is faulty, proceed to step 2, otherwise repeat step 1;
[0024] (2). Judging whether the wind power is reduced, if it is reduced, proceed to step 3, otherwise return to step 1;
[0025] (3). Change the power command of the DC system to make the DC power command track the change of wind power and change;
[0026] (4). If the wind power continues to increase, then the DC power will track and increase, otherwise the control will end.
[0027] In the step 3, the DC power changes with the wind power to maintain the grid power balance; in terms of reactive power, the reactive power Q consumed by the rectifier station converter c1 for:
[0028]
[0029] In the formula: P d1 is the DC power, U d...
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