ELECTRON METER OF REACTIVE POWER Russian patent published in 2001 - IPC

FIELD: electrical engineering. SUBSTANCE: invention can be utilized in systems of compensation of reactive power and pulse modulation in electrical networks both under sinusoidal and non-sinusoidal conditions. Circuit of electron meter of reactive power has multiplier to which output unit extracting component of signal of reactive power is connected. Unit extracting constant component of signal of pulse modulation is connected to output of unit extracting component of signal of reactive power. Meter is inserted with voltage instrument transformer and current transformer, circuit controlling unit extracting component of signal of reactive power and voltage follower. Circuit controlling unit extracting component of signal reactive power includes inverting amplifier whose input is connected to output of current transformer and whose output is connected to input of second amplifier-limiter which output is connected to input of second former of steep fronts of pulses. Input of first amplifier-limiter is connected to output of voltage instrument transformer. Output of first amplifier-limiter is connected to input of first former of steep fronts of pulses. Outputs of first and second formers of steep fronts of pulses are connected to inputs of first logic OR-ELSE gate whose output is connected to input of logic OR-ELSE gate which output is coupled to controlling input of unit extracting component of signal of reactive power. EFFECT: increased accuracy of measurement of reactive power both under sinusoidal and non-sinusoidal conditions in electric network. 1 cl, 3 dwg