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A METHOD FOR DETECTING FAULT AND CURRENT DIFFERENTIAL PROTECTION SYSTEM THEREOF
A METHOD FOR DETECTING FAULT AND CURRENT DIFFERENTIAL PROTECTION SYSTEM THEREOF
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机译:一种确定故障和电流差动保护系统的方法
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摘要
The present invention discloses a method for detecting a fault and a current differential protection system thereof. The method for detecting fault includes calculating fault component currents, calculating an operate current and a restraint current of all terminals, and adjusting an operate level by adapting an operate-restraint characteristic according to a fault component. The method has very small operating area for external faults, which makes the method very reliable even for the case with serious CT saturation. A very big operating area for internal faults makes the method very sensitive for internal faults even for a heavy load and high resistance fault.
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