Overview of Power Quality

1. Power Quality Assessment
Himanshu Paghdal
232825
Nilesh Solanki
2395871

2. Overview
₹ Organizations and standards
₹ Electromagnetic compatibility approach
₹ List of power quality disturbances
₹ Equipment approach
₹ Spectrum measurements technique
₹ Effects of harmonics
2

3. Organizations and standards
• International Electrotechnical Commission (IEC)
• European Committee for Electrotechnical Standardization
(CENELEC)
• Institute of Electrical and Electronics Engineers (IEEE)
• Leonardo Energy and Leonardo Power Quality Initiative (LPQI)
• International Council on Large Electric Systems (CIGRE)
• Electric Power Research Institute (EPRI)
• The International Energy Agency (IEA)
3

4. International Electrotechnical Commision
(IEC)
4

5. Institute of Electrical and Electronics
Engineers (IEEE)
5

6. Institute of Electrical and Electronics
Engineers (IEEE)
http://www.ieee.org/web/publications/home/index.html 6

7. Electromagnetic compatibility
approach
7

8. Relation between compatibility level
and emission limits
8

9. Relations between emission limits,
environment disturbance level and immunity
test level
9

10. Relations between power quality disturbances
referring to EN50160 (accepted by IEC)
Relations between power quality
disturbances referring to IEEE
10

11. Equipment approach
The standards contains methodology of emission test and limits for particular kind of
equipment
Limits for voltage changes - emission test - definitions
IEC 61000-3-3 Electromagnetic compatibility (EMC) – Part 3-3: Limits – Limitation of voltage
changes, voltage fluctuations and flicker in public low-voltage supply systems. Equipment
with rated current ≤ 16 A per phase and not subject to conditional connection.
IEC 61000-3-11 Electromagnetic compatibility (EMC) – Part 3-11: Limits – Limitation of voltage
changes, voltage fluctuations and flicker in public low-voltage supply systems. Equipment
with rated current ≤ 75 A per phase and not subject to conditional connection.
11

12. Equipment approach
12

13. Spectrum measurements technique
₹ Harmonic, interharmonic, no periodic distortion
₹ No harmonic distortion
₹ Odd-harmonic distortion
13

14. Harmonics groups, interharmonics groups
14

15. Effects of Harmonics
₹ Harmonic, interharmonic, no periodic distortion
₹ No harmonic distortion
₹ Odd-harmonic distortion
15

16. Supraharmonics
16

17. Significant authors and books
17

18. 18