Method for measuring effective value and initial phase of sinusoidal alternating voltage and the system for measuring the effective value and initial phase of sinusoidal alternating voltage

摘要

in the way and the measured instantaneous values of voltage sinusoidalnie four variable in equal intervals smaller than 1 / 2 period t voltage receiving respectively results u1 = u (t1), u2 = u (t2), u3 = u (t3), u4 = u (t4), where t1, t2, t3, t4 are the times of measurements.on the basis of the measurement results is calculated value of the auxiliary parameter? and then, calculate the value of an initial voltage and phase sinusoidalnie variable. analog to digital converter system includes measuring signal value napiu0119ciowego value proportional to the voltage at the input terminals.the measurement result of analog to digital converter is sent to the line buffer memory units connected in series four, which results from the last four measurements, which are connected with the calculation of parameters, which are calculated value of the auxiliary parameter? and then calculates the value of an initial voltage and phase sinusoidalnie variableafter measuring the first four values of instantaneous voltage and instantaneous voltage values measured for each another. the calculated values of the variable voltage sinusoidalnie system sends to the interface of the measuring system.