Published by Elspec LTD, website: elspec-ltd.com
The IEEE 519 standard defines the voltage and current harmonics distortion criteria for electrical systems design. The IEEE 519-2022 edition replaces the 2014 edition from December 2022.
The IEEE 519-2022 edition includes two important changes:
• Installations with mixed loads and Inverter Based Resources/Distributed Energy Resources
• Even current harmonics limits
New Guidelines for Installations with Mixed Loads and Inverter Based Resources/Distributed Energy
The 2022 edition instructs you whether to follow the IEEE-519 compliance criteria or different standards, as follows
1. IEEE-519 current limits at the point of common coupling (PCC) should be applied if the installation has an Inverted Based Resources (IBRs) or Distributed Energy Resources (DERs), in addition to the loads, and the combined site rated generation is lower than 10% of the annual average load demand.
2. IEEE 1547 or IEEE 2800 (if applicable) should be applied at the point of common coupling (PCC) should be applied if the installation has an IBRs or DERs, in addition to the loads, and the combined site rated generation is higher than 10% of the annual average load demand.
3. If the installation does not have an IBR or DER, IEEE-519 current limits should be applied at the PCC.
IEEE 519-2022: Even Current Harmonics Limits
The IEEE-519 defines the limits of current distortion per harmonic (in percentages of maximum demand load current) and TDD. The harmonics are divided to 5 groups (3rd – 10th, 11th – 16th, 17th – 22nd, 23rd – 34th and 35th – 50th), with different limits to each group of harmonics per rated voltage and ISC/IL ratio.
In the 2014 edition, all the even current harmonics were limited to 25% of their odd counterparts in their respective harmonic group. The 2022 edition is significantly different since only the even harmonics equal or below the 6th harmonic are limited, and these harmonics are limited only to 50% of their odd counterparts in the same harmonic group. The meaning is that all the even harmonics above the 6th harmonics’ values are allowed to be 4 times higher compared to the 2014 edition. i.e., the even harmonics values above the 6th harmonic can be the same as their odd counterparts in their harmonics group.
This might have a huge impact if you exceed the 2014 standard limits, as you may comply to the 2022 edition, avoiding penalties you might suffer from at the 2014 edition period.
An Example: Current Distortion Limits for Systems Rated 120 V – 69 KV
Table 1. (IEEE 519-2014)
Table 2. (IEEE 519-2022)
Source URL: https://www.elspec-ltd.com/are-you-compliant-with-the-ieee-519-2022-edition/
Power Quality Blog 