СПОСОБЫ И СОВРЕМЕННЫЕ УСТРОЙСТВА ПЛАВНОГО ПУСКА ВЫСОКОВОЛЬТНЫХ ДВИГАТЕЛЕЙ

Abstract

The relevance In today's industry, a lot of high-voltage electric drives are used. Highvoltage electric motors are used in oil and gas production, transportation, chemical and oil refineries, energy and water supply. However, during direct start of high-voltage motors, shock mechanical and electrical loads occur on the motors themselves, connected technological mechanisms and the electrical network. In pipelines during direct starts of pump drives, hydraulic pressure waves can occur, leading to the destruction of pipes and their joints. The motor winding during one start-up can heat up to critical temperatures, which causes aging of the insulation, as well as the impossibility of restarting for several hours. Therefore, the introduction of devices for scheduled start-up of high-voltage motors allows not only to reduce mechanical and electrical loads, but also to extend the life of motors and equipment. Aim of research It was necessary to consider the existing methods of starting highvoltage synchronous and asynchronous motors, as well as to analyze the soft starters manufactured by the industry and their characteristics. Research methods The provisions of the theory of electrical circuits, the theory of electrical machines and the theory of electric drive were used. Results In the course of the work, the existing methods for starting high-voltage motors were considered, their advantages and disadvantages, and the complexity of implementation were analyzed. The modern soft starters produced by the industry and their characteristics are analyzed.