Negative Impact Mitigation on the Power Supply System of a Fans Group with Frequency-Variable Drive

The technological installations’ characteristics are possible to improve by equipping fans with a frequency-controlled electric drive. However, it can lead an electromagnetic compatibility problem in the electrical supply system. This becomes worse if large number of included installation and drives powered from substation connected limited power source. As example, this article we investigate system gas cooling unit variable-frequency for fans. drives’ operating mode dependences characterizing non-sinusoidal voltages currents source obtained help simulation modeling MATLAB environment Simulink expansion package. typical circuit usage group drive does not meet requirements IEEE Standard 519-2014. We solve changing topology organizing DC busbars replacing frequency converters inverters. proposed forming using 12-pulse rectifiers transformers two secondary windings different connection schemes. results confirmed that provides voltage current harmonics level on accordance 519-2014 over entire range fans’ motor control.