A method for identifying inrush current based on power fault component criterion
A technology for exciting inrush current and power failure, which is applied in the direction of measuring current/voltage, measuring devices, and measuring electrical variables, etc., can solve the problems of not using exciting inrush current, and achieve the effects of improving identification effect, fast tripping, high sensitivity and reliability
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[0020] The present invention will be further described below in conjunction with embodiment.
[0021] A method for identifying inrush current of a power fault component criterion, characterized in that it comprises the following steps:
[0022] 1) Obtain all the voltage and current synchronous sampling data related to each circuit breaker on the boundary of the differential protection range;
[0023] 2) Convert all voltage and current sampling point data into per unit value data according to the power system per unit value conversion method:
[0024] u' 1(k) = u 1(k) / U 1e
[0025] u' 2(k) = u 2(k) / U 2e
[0026] i' 1(k) = i 1(k) / I 1e
[0027] i' 2(k) = i 1(k) / I 2e
[0028] u' 1(k) , u' 2(k) —Punit value data of voltage sampling point;
[0029] i' 1(k) , i' 2(k) —Punit value data of current sampling point;
[0030] u 1(k) , u 2(k) — Raw data of voltage sampling points;
[0031] i 1(k) i 2(k) - Raw data of current sampling point;
[0032] u 1e , u...
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