Line longitudinal differential protection method for transformer station area information collection
A longitudinal differential protection, substation technology, applied in emergency protection circuit devices, electrical components and other directions, can solve the problems of reducing the reliability and safety of substations, limited area of substations, and inability to configure fast protection for incoming lines, etc. Achieving good application prospects, improving reliability and safety
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[0022] The present invention will be further described below in conjunction with the accompanying drawings.
[0023] The line longitudinal differential protection device for collecting substation domain information of the present invention can realize selective and full-range quick-moving longitudinal differential protection without installing CT on the substation line, and improve the safety of the substation. reliability and security, such as figure 1 shown, including the following steps,
[0024] Step (1) The station area information collection device on this side collects the current of all intervals on the bus where the line is located; figure 2 As shown, this side is the M side, and the opposite side is the N side. If there is no CT on the bus side of the transformer bay, the other side of the transformer is used as the bay input;
[0025] Collect the current of all intervals on the bus where the transformer line is located. The collection methods include conventional...
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