A flexible DC power distribution network line differential protection system and differential protection implementation method
A flexible DC power distribution and DC line technology, applied in the direction of emergency protection circuit devices, electrical components, etc., to achieve the effects of high data time synchronization, accurate capture, and high sampling frequency
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[0044] The technical solution of the present invention will be described in further detail below according to the accompanying drawings. figure 1 A schematic structural diagram of the DC line differential system of the present invention is shown, and the DC line differential system includes a data acquisition device and a protection device. There are two sets of data acquisition devices and protection devices with the same structure, which are respectively arranged on both sides of the DC line; the protection devices on both sides of the DC line use optical fibers for data communication, and the data acquisition devices on both sides of the DC line realize the current signal at both ends of the line. synchronous collection. The protection devices at both ends of the DC line judge whether the differential current protection criterion is met according to the current data collected synchronously. If the criterion condition is met, the protection exit command is transmitted to the...
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