MODE OF TRANSFORM CIRCUIT OPERATION AND RELATED DEVICE FOR IMPLEMENTATION THEREOF Russian patent published in 2008 - IPC H02M7/53 

FIELD: electricity.

SUBSTANCE: mode of transform circuit operation contains transformation unit (1) with set of controlled high-power transistor keys and filter LCL (3) connected to each phase lead (2) of transformation unit (1) in which high-power transistor keys are operated by control signal (S), formed on the basis of active hysteresis power (d_p), reactive hysteresis power (d_Q) and specified transmission sector (θ_n). Active hysteresis power (d_p) is formed on the basis of differential active power (P_diff) sing the first hysteresis regulator (16), and differential active power (P_diff) is formed by subtraction of assessed active power (P) and active attenuation power (P_d) from reference active power (P_ref). Active attenuation power (P_d) is formed on the basis of regulated attenuation coefficient weighted (k_d) sum of product resulted from multiplication of component α of space-vector transformation of capacitor currents (i_Cfα) of filters LCL (3) and component α of current transformation (i_fiα) of phase leads and product resulted from multiplication of component β of space-vector transformation of capacitor currents (i_Cfβ) of filters LCL (3) and component β of current transformation (i_fiβ) of phase leads. Reactive hysteresis power (d_Q) is formed on the basis of differential reactive power (Q_diff) using the hysteresis second regulator (17). Differential reactive power (Q_diff) is formed by subtraction of assessed reactive power (Q) and reactive attenuation power (Q_d) from reference reactive power (Q_ref). Reactive attenuation power (Q_d) is formed on the basis of regulated attenuation coefficient weighted (k_d) difference of product resulted from multiplication of component β of space-vector transformation of capacitor currents (i_Cfβ) of filters LCL (3) and component α of space-vector current transformation (i_fiα) of phase leads and product resulted from multiplication of component α of space-vector transformation of capacitor currents (i_Cfα) of filters LCL (3) and component β of space-vector current transformation (i_fiβ) of phase leads.

EFFECT: reduction of output current distortions.

16 cl, 4 dwg