IEEE 519, also known as IEEE Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems, is a standard established by the Institute of Electrical and Electronics Engineers (IEEE). It provides guidelines and criteria for controlling harmonics, which are unwanted frequencies or disturbances that can affect the quality and reliability of electrical power systems.
The Importance of Harmonic Control
Harmonics can result from various sources, including nonlinear loads such as variable frequency drives, power electronic equipment, and even renewable energy sources. If not properly controlled, harmonics can lead to numerous issues, such as increased losses, interference with communication systems, equipment malfunctioning, and reduced system capacity.
The 1992 Edition of IEEE 519
The first edition of IEEE 519 was published in 1992 and introduced important provisions for harmonic control. This edition primarily focused on limiting harmonic voltages and currents at specific points in power systems, such as utility substations, industrial plants, and commercial facilities. It specified maximum allowed harmonic distortion levels based on the total short-circuit capacity of the system.
The 2014 Edition of IEEE 519
In 2014, IEEE 519 underwent a significant revision to address changing technological advancements and industry practices. The updated edition expanded the scope by covering not only voltage and current distortion but also additional measures related to power quality. It introduced new limits for individual harmonics, interharmonic frequencies, and resonance conditions.
Nina She