ANALYSIS AND SIMULATION OF WAYS OF STARTING THE ASYNCHRONOUS MOTOR OF AUXILIARY SUPPLIES

Abstract

The article is devoted to the analysis and simulation of ways of starting the asynchronous motor of auxiliary supplies using direct start, starting through the autotransformer, starting with the frequency converter, starting from star to delta and starting with capacitors using the example of an asynchronous motor of type AO2-72-2U3 with a capacity of 30 kW and a voltage of 0.4 kV, usedfor drive of the drain pump of turbo-generator 7A of the current TPS No.1 in Dushanbe of the Republic of Tajikistan [1]. Simulation of asynchronous motor starts with different auxiliary devices is implemented in the software complex ETAP (Electrical Transient Analyzer Program, OTI USA) [2]. The induction period of the asynchronous motor is characterized by a high starting current, and the bus to which the starting asynchronous motor is connected experiences a voltage drops, which causes some problems with the loads connected to this bus. Various ways of starting the asynchronous motor are used either to reduce the starting current or to reduce the voltage of the bus. The results of analysis and simulation were drawn, compared with the existing data.

Keywords

• direct start
• autotransformer
• frequency converter
• star-delta
• asynchronous motor
• simulation
• etap program
• tps no.1 dushanbe of the republic of tajikistan