1. Chapter 18 Utility Interface
Power quality has become an important issue
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

2. Various Loads Supplied by the Utility Source
PCC is the point of common coupling
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

3. Diode-Rectifier Bridge
Bock diagram
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

4. Typical Harmonics in the Input Current
Single-phase diode-rectifier bridge
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

5. Harmonic Guidelines: IEEE 519
commonly used for specifying limits on the input current distortion
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

6. Harmonic Guidelines: IEEE 519
Limits on distortion in the input voltage supplied by the utility
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

7. Reducing the Input Current Distortion
use of passive filters
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

8. Power-Factor-Correction (PFC) Circuit
For meeting the harmonic guidelines
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

9. Power-Factor-Correction (PFC) Circuit Control
generating the switch on/off signals
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

10. Power-Factor-Correction (PFC) Circuit
Operation during each half-cycle
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

11. Thyristor Converters for 4-Quadrant Operation
Two back-to-back connected 2-quadrant converters
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

12. Switch-Mode Converter Interface
Bi-directional power flow; unity PF is possible
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

13. Switch-Mode Converter Interface
Rectifier and Inverter modes based on the direction of power flow
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

14. Switch-Mode Converter Control
DC bus voltage is maintained at the reference value
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

15. Switch-Mode Converter Interface
Waveforms in the rectifier mode
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

16. 3-Phase Switch-Mode Converter Interface
Rectifier and Inverter modes based on the direction of power flow
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

17. EMI: Conducted Interefence
Common and differential modes
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

18. Chapter 18 Utility Interface
Switching Waveforms
Typical rise and fall times
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

19. Chapter 18 Utility Interface
Conducted EMI
Various Standards
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface

20. Chapter 18 Utility Interface
Conducted EMI
Filter arrangement
Copyright © 2003
by John Wiley & Sons, Inc.
Chapter 18 Utility Interface