Method for measuring active, wattless and apparent power consumed by two-terminal network powered by sinusoidal alternating voltage and the system for measuring active, wattless and apparent power consumed by two-terminal network powered by sinusoidal alternating voltage

摘要

in the instantaneous voltage value is measured four times on dwu00f3jniku in equal intervals ts, which are less than 1 / 2 of period t and measured four times the instantaneous value voltage peak current flowing through dwu00f3jnik in these same equal intervals ts.the implementation of four measurements of instantaneous voltage on dwu00f3jniku terms of four measurements of instantaneous peak current flowing through dwu00f3jnik is controlled while maintaining the conditionthe first measurement value for dwu00f3jniku instantaneous voltage and instantaneous current intensity flowing first measurement values by dwu00f3jnik pursues in the time interval tp equal to 1 / 2 interval ts measurements of instantaneous values of current and voltage, namely tp = 1 / 2ts.on the basis of the measurement results is calculated auxiliary parameter? and then, calculate the power of active, passive and apparent charged by dwu00f3jnik powered electric sinusoidalnie variable.the system contains multiplekser analog switch alternately on the analogue to digital converter napiu0119ciowe signals proportional to the current values and voltage dwu00f3jnika on dwu00f3jniku, the system performs alternately one measurement value instantaneous power voltage.the measurement result of analog to digital converter is sent to the line buffer memory units connected in series eight, which results the last eight measurements, which are connected with the calculation of parameters, which are calculated value of the auxiliary parameter? ,and then calculates the value of the active power and reactive apparent measured instantaneous current value and the first four four instantaneous voltage value, and the measured value of each successive instantaneous current or voltage.