Innovative Control of the High-Voltage Thyristor Arm of the Ice Melting Plant with Rectified Current on the Wires of Overhead Transmission Lines

The article provides general information about controlled installations for ice melting with rectified current on overhead power lines of 110 kV and above, as well as areas of application of such installations. The main elements of ice melting plants are highlighted, such as thyristor controlled rectifier bridge and ice melting switch. The relevance of a universal ice melting unit for 110, 220 kV overhead lines is noted. An innovative system of discrete (relay) control of thyristor arms with a cascade anode voltage by changing the state of one contact (switch) is considered, while its performance is shown on computer and physical models. The results of computer and physical modeling of the operation of a high-voltage thyristor arm with a cascade anode voltage by changing the state of one contact (switch) within a thyristor controlled rectifier bridge and an ice melting switch are described.