Quality evaluation of energy consumed in flow regulation method by speed variation in centrifugal pumps

The International Congress of Mechanical Engineering and Agricultural Sciences 2013

机械制造;农业科学

Morales, S.^1 ; Culman, M.^1 ; Acevedo, C.^1 ; Rey, C.^1

Research Group in Resources, Energy and Sustainability (GIRES), Faculty of Energy Engineering, Universidad Autónoma de Bucaramanga (UNAB), 680003 Bucaramanga, Colombia^1

关键词: Efficient use of energy;    Electric power quality;    Energy-saving devices;    Flow control methods;    Quality evaluation;    Three phase induction motor;    Three phase motor;    Variable frequency drives;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/59/1/012011/pdf
DOI  :  10.1088/1757-899X/59/1/012011

学科分类：农业科学（综合）

来源: IOP

【 摘 要 】

Nowadays, energy efficiency and the Electric Power Quality are two inseparable issues in the evaluation of three-phase induction motors, framed within the program of Rational and Efficient Use of Energy (RUE).The use of efficient energy saving devices has been increasing significantly in RUE programs, for example the use of variable frequency drives (VFD) in pumping systems.The overall objective of the project was to evaluate the impact on power quality and energy efficiency in a centrifugal pump driven by an induction three-phase motor, using the flow control method of speed variation by VFD. The fundamental purpose was to test the opinions continuously heard about the use of flow control methods in centrifugal pumps, analyzing the advantages and disadvantages that have been formulated deliberately in order to offer support to the industry in taking correct decisions. The VFD changes the speed of the motor-pump system increasing efficiency compared to the classical methods of regulation. However, the VFD originates conditions that degrade the quality of the electric power supplied to the system and therefore its efficiency, due to the nonlinearity and presence of harmonic currents. It was possible to analyze the power quality, ensuring that the information that comes to the industry is generally biased.