Line differential protection action boundary calculation method and system
The invention discloses a line differential protection action boundary calculation method and system. The method comprises the following steps: determining a differential current and a braking current according to currents at two sides of a sending-out line, and determining an action criterion of di...
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| Hauptverfasser: | , , , , , , , , , |
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The invention discloses a line differential protection action boundary calculation method and system. The method comprises the following steps: determining a differential current and a braking current according to currents at two sides of a sending-out line, and determining an action criterion of differential protection; constructing a differential protection action boundary function according to the relation equation set of the differential current and the braking current; the change attribute of the differential protection action boundary function is analyzed, and the change rule of the variable quantity in the differential protection action boundary function is determined; and according to the differential protection action boundary function, determining a protection action refusing area boundary through the change rule, and evaluating the protection action performance. Therefore, the differential protection correct action boundary of the new energy station sending-out line is determined, and then the new |
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