automatic voltage regulator
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This document summarizes an engineering student's project on automatic voltage control. It discusses the need for automatic voltage regulators to maintain constant voltage levels, as utility voltages can fluctuate by up to 13% from nominal levels. It also describes how voltage drops within facilities drive voltages even lower. Precise voltage regulation is important because electrical equipment operates best within a narrow voltage range and fluctuations can cause equipment malfunction or damage. The document outlines different categories of voltage regulators, including their design and whether they regulate AC or DC voltages.
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If the input dc is a voltage source, the inverter is called a Voltage Source Inverter (VSI). One can similarly think of a Current Source Inverter (CSI), where the input to the circuit is a current source. The VSI circuit has direct control over ‘output (ac) voltage’ whereas the CSI directly controls ‘output (ac) current.
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Save on refrigeration freezers and ventilation. UST Power saves 8% to 15% on the power of your entire supermarket. When you place a UST power conditioner between the grid and your critical equipment, you can be assured that common electrical anomalies, of any intensity or duration, will be stopped and corrected within, depending on
your needs, one, two or three cycles and an efficiency of 99%. At an incomming voltage of 230V +/- 10%, the nominal output voltage can be set to 215V +/- 1%.
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automatic voltage regulator
- 1. GOVERNMENT ENGINEERING COLLEGE BHARUCH SUBJECT :- P.S.O.C. TOPIC:-Automatic Voltage Control Submitted by:- Enroll. No. :- 140140109083 Name:- Sumit B. Patel ELECTRICAL DEPARTMENT (8TH SEM)
- 2. Outline • Regulator - Voltage Regulator - Need for AVR - Category of Voltage Regulator
- 3. Voltage Regulation - An automatic voltage regulator, AVR for short, is a device that is designed to automatically control, adjust or maintain a constant voltage level. - tremendous diversity in the size and type of device that could qualify to be called an AVR
- 4. Need for Voltage Regulator • the ultimate reason for using voltage regulation is financial – to avoid the costs associated with equipment damage and downtime caused by poor voltage levels. - Utility Voltage Levels - - Voltage Drop in a Facility - - Sensitivity to Voltage Levels and Voltage Fluctuation
- 5. Utility Level • 120V to a small or large degree • Factors contributing to voltage level fluctuation such as 1. location on the local distribution line 2. proximity to large electricity consumers 3. proximity to utility voltage regulating equipment 4. seasonal variations in overall system voltage levels 5. load factor on local transmission and distribution system • Try to Maintain the voltage level within +/-5% (480V+/-5%) • Sometimes 6% high or 13% low (509V(480+6%) to 420V(480-13%))
- 6. Voltage Drop in a Facility • a voltage drop of 3 to 5% to the end user • due to wiring impedance within a building will always drive voltage levels lower • Eg, if the incoming utility voltage is 5% low, the voltage at the point of usage might be 8 to 10% (5%+3% to 5%+5%) below nominal due to the voltage drop within a building
- 7. Sensitivity to Voltage Levels and Voltage Fluctuation • Every piece of electrical equipment will operate within a range of voltage levels, however not necessarily with optimal performance. When the voltage level falls outside of its operational range, a device may be unable to start or operate, it may malfunction or the device may be damaged.
- 8. • utility voltage levels are very dynamic and will most assuredly change over time and there is no advance warning about when, how much or in which direction they will change, due to the little control over the amount of electricity demanded by any customer at any given time by the utility . • Thus, increasing use of relatively sensitive electronics in nearly all facets of business and industry and the growing need for voltage regulation becomes clearer.
- 9. Category of Voltage Regulator • Feed :-forward design or negative feedback control loops • Mechanical voltage regulator or electronic voltage regulator • used to regulate AC or DC voltages • Active regulators or shunt regulators Linear regulat Switching regulators
- 10. THANK YOU