STUDY OF STARTING MODES OF ASYNCHRONOUS MOTORS WITH LOW-QUALITY OF POWER SUPPLY ELECTRICITY
To analyze the starting transient processes of an asynchronous motor with a low quality of electricity in the supply network. To consider starting an asynchronous motor at a reduced mains voltage, at a reduced mains frequency, as well as starting with voltage dips in the network. METHODS. Simulation modeling based on computer models was adopted as the main research method. For this purpose, computer models of the system under study were developed in the MATLAB / Simulink program. RESULTS. The article discusses the main advantages and disadvantages of asynchronous electric motors, analyzes the negative starting factors of asynchronous machines, performs computer modeling of an asynchronous machine when powered from a network with reduced voltage and frequency. A study of voltage dips in the network at starting modes of asynchronous machines has been carried out. For this purpose, a computer model has been developed to study the voltage dips in the network caused by starting modes of electric motors. The results are given in the form of graphs of the transient processes of an induction motor, which show the behavior of this type of machine when starting from the network with low power quality. CONCLUSION. The novelty of the research lies in the computer simulation of an induction motor in absolute units, as well as in a detailed graphical display of the results.