Draft Guide for Harmonic Limits for Single-Phase Equipment

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(This introduction is not part of IEEE P1495, Guide on Harmonic Limits for Single-Phase Equipment.)
With increasing quantities of non-linear loads being added to electrical systems, it has become necessary to establish criteria for limiting problems from system voltage degradation. Presently, IEEE Standard 519-1992 addresses harmonic limits at the consumer and service provider interface. The intent of IEEE 519 is to limit harmonic current injection into power systems and ensure voltage integrity. This standard is manageable and practical when properly applied to industrial and commercial three-phase consumers. However, when IEEE 519 is applied to single-phase system connections (particularly residential consumers), it can become highly impractical. Furthermore, engineering studies indicate that the cumulative effect of single-phase non-linear loads may potentially cause voltage degradation on power distribution systems even with individual single-phase consumer IEEE 519 compliance.
The following guide recommended practice/standard for equipment is developed to help preserve voltage integrity by limiting harmonic current injection of single-phase loads which are likely to appear in increasing numbers in power distribution systems. By addressing harmonic current distortion at the individual sources, system problems may be avoided, particularly in areas where IEEE 519 limitations are not likely to be followed. The harmonic current limits established in this standard are proposed with the intent of minimizing the impact on existing equipment design. Coordination with existing industry practices, and international harmonic standards is also considered.

At the time this standard was completed, the working group had the following membership:

The following persons were on the balloting committee: (To be provided by IEEE editor at time of publication.)

Note: new text (i.e., changes from previous version) is added in italics. Deletions are shown with a strikethrough.


Draft Guide for 1

Harmonic Limits for Single-Phase Equipment 1

Introduction ii

1.Overview vi

1.1 Scope vi

1.2 Purpose vii

2. References vii

3.Definitions vii

3.1 Abbreviations vii

3.2 Definitions vii

4.Loads covered in this guidestandard viii

4.1 Switch-Mode Power Supplies viii

4.2 Electronic Ballasts for Fluorescent Lighting x

4.3 Variable Speed Heat Pumps and Central Air Conditioning xi

4.4 Electric Vehicle Battery Chargers xi

5. Background xii

6. Existing related industry standards and practices xiii

6.1 IEEE 519 xiii

6.2 IEC 61000-3-2 and IEC 61000-3-4 (formerly 1000-3-2 and 1000-3-4) 15

6.3 California Energy Commission electric vehicle charger requirements 16

7.Recommended distortion limits 17

7.1 Differences in distribution design 17

7.2 Consideration of multiple nonlinear loads 20

7.3 Diversity effects 20

7.4 Cancellation effects 21

7.5 Load levels and harmonics 21

7.6 Limits 21

8. Testing requirements 21

8.1 Background 22

8.2 The voltage supply 22

8.3 Harmonics Analyzer 23

8.4 The Transducers 24

8.5 Suggested Protocol 25

9. Bibliography 26

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