Calibration method for distortion current detection error of electronic release
An electronic release and error detection technology, which is applied in circuit breaker testing, measurement of electrical variables, AC/pulse peak measurement, etc., can solve problems such as threats to electronic release accuracy and current distortion
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[0053] Taking the electric arc furnace load widely used in industry as an example, the electronic trip detection error caused by distorted current is analyzed. Using computer simulation software to build a model of a typical nonlinear load electric arc furnace system, the results are as follows: Figure 7 The electric arc furnace melting period current waveform shown. The waveform is a typical peak wave, which can be approximately equivalent to a triangular wave, and the duty cycle of the equivalent triangular wave is 0.7. The peak value of the positive half cycle of the waveform is 2900A, the mean value of the positive half cycle is 1160A, and the effective value is 1530A. The waveform corresponding to the detection error of the two detection methods and the detection error value of the approximate triangular wave are shown in Table 2, and the detection error of the approximate triangular wave is equivalent to the actual waveform. The effective value obtained by the electri...
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