Fault current limiter input control method based on short-circuit current comprehensive information
A fault current limiter, integrated information technology, applied in the field of power system, can solve problems such as difficulty in ensuring accuracy, achieve the effect of ensuring safe and stable operation, avoiding insufficient breaking capacity, and preventing misjudgment
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[0049] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0050] Such as figure 1 As shown, the simulation model of the 330kV double-ended transmission system is given. The capacity of a single generator is 2200MV·A, the capacity of a single transformer is 2200MV·A, the transformation ratio is 330 / 20, and the load of a single bus is (1600+ j400)MV·A, the length of the single-circuit line is 100km, the positive sequence impedance is (3.63+j50.03)Ω, and the zero sequence impedance is (37.96+j 132.78)Ω.
[0051] Such as figure 2As shown, the structure topology of the arc current transfer current limiter is given. The dotted line part is the main body of the current limiter, which is composed of a measurement and control unit, a fast switch and a current limiting reactor. When the system is running normally, the fast switch is closed, and the loss is approximately zero; when the measurement and contro...
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