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Simulation of Variable Frequency Drive Pump for Storm Water Control

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Simulation of Variable Frequency Drive Pump for Storm Water Control This thesis/project/dissertation has been reviewed for 508 compliance. To request enhancements, please email [email protected]. SIMULATION OF VARIABLE FREQUENCY DRIVE PUMP FOR STORM WATER CONTROL A Project Presented to the faculty of the Department of Electrical and Electronic Engineering California State University, Sacramento Submitted in partial satisfaction of the requirements for the degree of MASTER OF SCIENCE in Electrical and Electronic Engineering by Muhammad Faisal Saeed SPRING 2017 © 2017 Muhammad Faisal Saeed ALL RIGHTS RESERVED ii SIMULATION OF VARIABLE FREQUENCY DRIVE PUMP FOR STORM WATER CONTROL A Project by Muhammad Faisal Saeed Approved by: __________________________________, Committee Chair Fethi Belkhouche, Ph.D. __________________________________, Second Reader Tracy Toups, Ph.D. ____________________________ Date iii Student: Muhammad Faisal Saeed I certify that this student has met the requirements for format contained in the University format manual, and that this project is suitable for shelving in the Library and credit is to be awarded for the project. __________________________, Graduate Coordinator ___________________ Preetham Kumar, Ph.D. Date Department of Electrical and Electronic Engineering iv Abstract of SIMULATION OF VARIABLE FREQUENCY DRIVE PUMP FOR STORM WATER CONTROL by Muhammad Faisal Saeed The project focuses on the application of variable frequency drives for storm water pump stations. Multiple pumps are activated according to the water level in the storage box. The multiple starts of the regular starter based pumps at full speed cause the pumps to consume high inrush current. This problem can be solved by using variable frequency drives. Simulink is used in this project to show that the variable frequency drive based storm water pump stations consume less electrical energy and thus improve pump efficiently as compared to the constant speed pump stations [1]. Approved by: __________________________________, Committee Chair Fethi Belkhouche, Ph.D. _______________________ Date v ACKNOWLEDGEMENTS This project is finished successfully through the help and support from the following people: my advisors, parents and friends. I would like to extend my sincere thanks to all of them. I am highly indebted to Prof. Fethi Belchouche and Prof. Tracy Toups for their guidance and encouragement. Prof. Fethi Belchouche offered great help on academic knowledge, laboratory platform, project organization, and guidance of this paper. At the same time, I would like to thank Dr. Tracy Toups for being my second advisor and giving me so much valuable supervision and advice on this project, especially for his great guidance of MATLAB simulation. Finally, I would like to thank my parents and friends, who provided me support at any time. The accomplishment of the project would not have been possible without them. vi TABLE OF CONTENTS Page Acknowledgements .................................................................................................... vii List of Tables .............................................................................................................. xi List of Figures ............................................................................................................ xii Chapter 1. INTRODUCTION ………………………………………………………………. 1 1.1 Components of storm water pump station ....................................................... 1 1.2 Variable frequency drive.................................................................................. 4 1.3 Soft starter ........................................................................................................ 5 1.4 Pump…………………………………………………………………….. ...... 5 2. PUMP STATION COMPONENT CHARACTERISTICS .................................... 6 2.1 Dimensions of mechanical components........................................................... 6 2.2 Pump characteristics ........................................................................................ 6 2.3 Variable frequency drive characteristics ........................................................ 10 3. PUMP STATION CONTROL SCHEMES .......................................................... 12 3.1 Constant speed (float switch based) control .................................................. 12 3.2 Variable frequency drive based control ......................................................... 14 4. PERFORMANCE CRITERIA.............................................................................. 18 4.1 Total energy consumption.............................................................................. 18 4.2 Water transportation efficiency...................................................................... 18 vii 4.3 Pump efficiency ............................................................................................. 19 4.4 Water transportation time .............................................................................. 20 5. SIMULINK COMPONENTS ............................................................................... 21 5.1 Electrical power source and measurement ..................................................... 21 5.2 Variable frequency drive and motor settings ................................................. 21 5.3 Centrifugal pump settings .............................................................................. 24 5.4 Water reservoir boxes settings ....................................................................... 25 5.5 Miscellaneous mechanical components ......................................................... 29 5.6 Mechanical sensors ........................................................................................ 30 5.7 Control system components ........................................................................... 32 5.8 Measurement block ........................................................................................ 40 6. SIMULATION SETUP ........................................................................................ 45 6.1 Simulation of storm water .............................................................................. 45 6.2 Simulation time .............................................................................................. 46 6.3 Simulation solver ........................................................................................... 46 6.4 Water level setting ......................................................................................... 47 7. SIMULATION RESULTS AND COMPARISON .............................................. 49 7.1 Wet well water level ...................................................................................... 49 7.2 Electrical energy consumption ....................................................................... 51 7.3 Pump efficiency ............................................................................................. 53 7.4 Overall performance comparison ................................................................... 57 viii 8. CONCLUSION ..................................................................................................... 57 8.1 Electrical energy consumption ....................................................................... 57 8.2 Pump efficiency ............................................................................................. 57 8.3 Water transportation time .............................................................................. 58 References ................................................................................................................... 59 ix LIST OF TABLES Tables Page 1. Typical dimensions of pump house mechanical devices .………………………6 2. Head pump curves with motor speed and flow ………………………………...8 3. Brake horsepower pump curves with motor speed and flow…………………...9 4. Pump stations electrical energy consumption’ comparison …………….……..53 5. Pump stations performance’ comparison ……………………………………...56 x LIST OF FIGURES Figures Page 1. Typical pump house …….………………………….….……………………….3 2. Variable frequency drive……. ………………………………………………. ..4 3. Head pump curves ……………………………………………………….….….7 4. Brake horsepower pump curves…………………………………………............9 5. Higher-level schematics of DTC VFD …...………….…………………….......11 6. Level based control ……….…………….………………………………….......13 7. Level based control ……….…………….………………………………….......15 8. Electrical power supply and measurements ………..………………………......21 9. DTC AC4 Simulink drive model …………………..………………………......22 10. DTC AC4 Simulink drive model parameters …………….……………………23 11. Centrifugal pump model ……………………………………..………………...24 12. Centrifugal pump parameters ……………….………………………………....25 13. Water reservoirs in storm water system …..……………………………….…..26 14. Water reservoir ports in simulink…………........................................................27 15. Wet well tab settings in Simulink …..……........................................................28 16. Discharge box tab settings in Simulink……………………………...................28 17. Discharge pipe symbol in Simulink …………..…………………………….....29 18. Discharge pipe tab settings in Simulink ……………..…………………….......29 19. Discharge pipe vertical tab settings in Simulink ……..………………………..30 xi 20. Discharge pipe check valve in Simulink …………..………………………..30 21. Ideal torque sensor in Simulink …………………………..………………....31 22. Flow sensor in Simulink …………...………………..……………………....31 23. Pressure sensor in Simulink ……………………….……….……………......31 24. Liquid level sensor in Simulink …….………………….……..…………......32
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