Using Medium Voltage Variable Frequency Drives Instead of Medium Voltage Switchgear in a Pump System

Abstract

The rapidly accelerating pace of industrialization that is taking place in every region of the globe has resulted in a serious shortage of electrical energy. As a result, the already existing generating capacity must be increased to meet the growing demand. Yet, given the limited number of natural resources that are now accessible, the "Energy Saving" solution is the most critical response to the power constraint. More than eighty percent of the world's total energy consumption is accounted for by alternating current induction motors, which are used by the great majority of industrial sectors. To accomplish even more significant cuts in energy usage, existing Low-Tension Motors have Variable Frequency Drives (VFDs) placed in them. This is being done to save money. The maximum voltage that may be applied to these motors is 480 volts. Currently, which is a component of the industry, there is a need to preserve electricity in the High-Tension Motor sector, which includes ratings of 3.3, 6.6, and 11 KV. It is strongly suggested that any existing High Tension or High Voltage Motors be replaced with Low Tension Motors (with a rating of up to 400 kW, if at all feasible), since this makes the inclusion of VFDs considerably less complicated. This is since high-tension variable frequency drives (VFDs) have a complicated circuit, they are very costly, and they demand a lot of space. Using the continuous process chemical plants, this study discusses the modifications and requirements for retrofitting work. This report also devotes considerable attention to a discussion of the fruitful outcomes that were achieved.

Optimum Design of an 18-Pulse Phase Shifting Autotransformer Rectifier to Improve the Power Quality of Cascaded H-Bridge Motor Driver

“…2 using assumed parameters. The power capacity of an autotransformer can be determined by ( 8)-( 13): 11) 0.35 0.27 0.009 ,…”

“…The 18-PSAT is connected to the converter through a 6-pulse bridge rectifier [9], [10]. In [11], the authors propose a 20-PSAT rectifier that reduces THD by less than 8 %. In [12], a low-rating autotransformer is proposed that reduces the complexity of the design and the total cost.…”