Compensation device of harmonic currents and reactive power

摘要

The invention relates to electrical engineering and electricity, namely to the devices of higher harmonic current in electric networks and power factor correcting network and can be used to reduce current harmonics in power supply systems with a large number of non-linear loads. The apparatus comprises an inverter, a storage capacitor, an input choke and a block control signal generation unit generating a control signal consists of a block of an active filter phase current sensor unit phase current sensors valve rectifier block phase voltage sensors, DC link current sensor valve rectifier unit in comparison, driver control pulses on the basis of the relay current regulators with variable hysteresis width calculation block forming phase currents valve Nogo rectifier which consists of the amplitude value calculation unit phase current rectifier rectifier calculation unit instantaneous phase angle and voltage multiplier. Compound of said blocks made in accordance with the application materials. The apparatus allows to raise the quality of electricity in the network with a nonlinear load, performing compensation of the higher harmonics of the current and voltage on the basis of the algorithm, and comparing the calculated actual phase currents valve rectifier load mismatch and eliminating obtained by generating a compensating current. The achieved technical result of the invention is to reduce the coefficients of the distortion sinusoidal current curves resulting from harmonics and phase shift of current network because of nonlinear load operation which is associated with a dynamic change in a non-sinusoidal current consumption, and improving the power factor of the network. 1 SP forms., 4 ill.