CONTROL SYSTEM OF CONTROLLED VOLTAGE RECTIFIER Russian patent published in 2017 - IPC H02M1/08 H02M7/66 H02M7/757 G05F1/565 

FIELD: electricity.

SUBSTANCE: controlled voltage rectifier can maintain the required value of the displacement angle ϕ₁ between a sinusoidal voltage having a frequency f₁ of the alternating voltage source to which the input terminals of the controlled voltage rectifiers (CVR) are connected, and the first harmonic of the input current of the CVR. In particular, when the CVR operates as a rectifier receiving power from the alternating voltage source (VS) and transmitting it to its DC consumers 4, the first harmonic of the input current of the CVR coincides in phase with the corresponding phase voltage of the VS, then the angle ϕ₁ is equal to 0 radians (or 0). In addition, the CVR can operate as a stand-alone voltage inverter transferring power from the DC consumer (4) DC to the VS. In this case, the first harmonic of the input current of the CVR is opposite in phase to the corresponding voltage of the VS, i.e. the angle ϕ₁ is equal to π (180). In both cases, the absolute value of the power factor consumed from the VS or entering it is 1, i.e. it has the maximum value. Apart from the CVR the control system contains the following main elements: a control device (5), a control unit (6) and measuring transducers of the input (21) and output (24) currents, and the input (22) and output (23) voltages. The control system is supplemented with a device (2) for connecting the CVR to the VS. The device (2) includes a current-limiting circuit containing a current-limiting reactor (34), as well as the first (35) and second (36) switches, and additional measuring transducers for the input current (37) and the input voltage (38) of the device (2). In addition, the control system is supplemented by an evaluation unit (7), an information display unit (8) and an additional measuring transducer (25) of the output voltage of the CVR.

EFFECT: decrease down to safe values of the current circuits of controlled voltage rectifiers arising when connecting the controlled voltage rectifiers with uncharged output capacitor to an AC voltage source at times when the voltage of the voltage source is close to its peak value, simplified, accelerated, and improved quality of the output capacitor capacity setting, inductance of the current-limiting reactor of the controlled voltage rectifiers and coefficients of the communication transmission between elements of the control device.

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