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PHASE ANGLE DIFFERENCE, FREQUENCY DIFFERENCE AND FREQUENCY CALCULATION METHOD IN DIGITAL PROTECTION RELAY
PHASE ANGLE DIFFERENCE, FREQUENCY DIFFERENCE AND FREQUENCY CALCULATION METHOD IN DIGITAL PROTECTION RELAY
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机译：数字继电保护中的相角差，频率差和频率计算方法
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摘要
PURPOSE: To decide a phase angle difference with high precision and decide a frequency difference and a frequency accurately and continuously at arbitrary timings without depending upon sampling timings. ;CONSTITUTION: The product calculation of the values of sampling data 2 is performed in a process 1. The outputs of the calculation process 1 are inputted to n-step digital filters 2, 3,... to reduce the gain near a second harmonics and perform the suppression of errors.;COPYRIGHT: (C)1996,JPO
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