Invention Application
US20160334469A1 PHASE AND GROUND PROTECTION USING TILT-LIMITED ADAPTIVE QUADRILATERAL CHARACTERISTIC 有权
使用倾斜有限自适应四边形特征的相位和接地保护

PHASE AND GROUND PROTECTION USING TILT-LIMITED ADAPTIVE QUADRILATERAL CHARACTERISTIC
Abstract:
A quadrilateral distance module may be used to detect faults in an electrical power system. A resistive coverage of the quadrilateral distance module may be defined by an adaptive resistance blinder. Tilt of the adaptive reactance element and resistance blinders may be limited. When an angle between the sequence-component based, current polarizing quantity and the element loop current does not exceed a predetermined angle threshold, the sequence-component based polarizing quantity may be used. Otherwise, the element loop current may be used to limit the tilt. Fault detection may comprise comparing both the adaptive resistance blinders for forward and reverse load flow conditions to power system stimulus and detecting a fault when the stimulus satisfy either blinder.
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