A IMPORTÂNCIA DOS INVERSORES DE FREQUÊNCIA EM SISTEMAS DE ADUTORAS DE ÁGUA

Abstract

Water mains are currently the most affected by overpressure of water pumps, due to the sudden startup of motors over dimensioned due to the need for a high starting torque and constant starts, where the upper reservoirs have a level point Minimum of water, when the pump must be turned on and off when it reaches the maximum level, with this scenario the late effects are disruptions of the mains networks that do not withstand sudden changes and pressure, resulting in an increase of corrective maintenance, waste of water And lack of supply to the local population. The objective of this work is to demonstrate that it is possible to achieve greater efficiency by investing in water pressure management systems that allows only the desired pressure required and for that, instead of using only by-pass valves to control the pressure of The frequency inverter is used in the water pump, which operates at the speed of the water pump, decreasing or increasing, depending on the variation of the water flow. By analyzing the results of a system with and without variable speed drive and a comparative simulation starting a 5CV (Horse Steam) motor connected directly or through a frequency inverter, where it will be possible to analyze the behavior of speed, current, voltage And power. It is concluded that in systems with the use of frequency inverter, it is noted that it has a high starting torque, allowing a smaller motor, low starting peak current, smoother starting, high power factor, easy automation and a Variable speed maintaining the nets with a pressure close to the desirable one, even if the flow is variable, decreasing the daily departures to almost zero, with a controlled pressure allowing the same elevation adductor network to be shared with direct pumping the consuming units.