METHOD FOR APPLICATION OF CONVERSION CIRCUIT AND DEVICE FOR REALISATION OF THIS METHOD Russian patent published in 2010 - IPC H02M7/219 

FIELD: electricity.

SUBSTANCE: method for application of conversion circuit, besides this circuit comprises conversion unit (1) with multiple controlled powerful semiconductor switches and energy-accumulating circuit (2) from two serially connected capacitors, when controlled powerful transistor switches are controlled by means of control signal (S), produced on the basis of vector (x) of hysteresis signal, at the same time vector (x) of hysteresis signal is formed on the basis of vector (Δ_ifi,i) of differential phase current of supply by controller (6) of hysteresis, and vector (Δ_ifi,i) of differential phase supply current is produced by subtraction of vector (i_fi,i) of phase supply current from vector (i_fi,i,ref) of reference phase supply current, moreover, vector (i_fi,i,ref) of reference phase supply current is produced on the basis of value (P_diff) of differential active power, value (Q_diff) of differential reactive power and vector (ψ_g,αβ) of phase flow. For reliable provision of constant switching frequency of controlled powerful semiconductor switches and formation of vector (Δi_fi,i) of differential phase supply current, addiitonally value of current correction (i₀) is subtracted, besides value of current correction ((i₀) is formed by integration of average value (Uinv,A) of phase supply voltage, and average value (u_inv,A) of phase supply voltage is formed by definition of arithmetic mean of phase supply voltages (u_inv._iM) with the help of reference point of connection (M) of capacitors in energy-accumulating circuit (2). In device to realise method of conversion circuit application, computer unit additionally serves for formation of rated vector of filter capacitor on the basis of current value of DC voltage in energy-accumulating circuit (2).

EFFECT: development of method for application of conversion circuit, which may be used to maintain switching frequency of controlled powerful semiconductor switches as practically permanent in conversion unit of conversion circuit.

16 cl, 6 dwg