What is the IEEE 519 Standard?
The purpose of IEEE 519 is to limit its negative impactLinear power system load.
Power system harmonics have become a problem in electrical system design because static power converter drivers with capacitors are widely used in 1970 s.Power system harmonics start to damage sensitive electronic equipment and control systems.
IEEE 519 provides standard methods for measuring current harmonics and voltage harmonics, and has developed recommended guidelines for power system harmonics.
Unlike electrical standards such as national electrical codes (NEC) and National Electrical Safety Codes (NESC), IEEE 519 is just a recommendation and has never been adopted as a law.
IEEE 519 refers to the connection point between the utility line and the building power system as a public coupling point or PCC.The PCC is generally a medium voltage (MV) transformer or a low voltage (LV) transformer.
The IEEE Standard 519 also contains Harmonic Control suggestions for devices with reactive components such as rectifier and capacitors.IEEE 519 is designed to measure the power harmonics on the power system connection between utility lines and buildings.
Power systems can experience harmonics in current and voltage.The AC system will naturally experience some changes, but more than a few percent of the changes will burn out electrical components such as capacitors and inductors.When the voltage frequency changes, the capacitor converts it to a current that changes more.
IEEE Standard 519 recommends that the maximum total harmonic distortion or THD of the current and voltage of the low-voltage line be 5%.IEEE 519 requires voltage distortion to be reduced on high-voltage lines of 69 kV or 69 kV or above.
IEEE Standard 519 recommends that any primary harmonic contribute no more than 3% to current harmonics and no more than 1% to voltage harmonics.IEEE recommends a single voltage distortion of 1.The PCC voltage is from 69 to 5% kV and the power line with a total voltage distortion of 2 is 151 or less.5% or less.Each harmonic on the power line contributes to the total harmonic distribution.IEEE Standard 519 recommends a single voltage distortion of 1% or less for lines with a total voltage distortion of 1 of 161 kV or more.5% or less.
Baseline total harmonic distortion or THD is the input current and voltage of the power supply from the utility.Voltage distortion is measured from the sine wave form of the input AC voltage.Total harmonic distortion should be measured every other minute.
Harmonics should be measured before and after the device is turned on.Voltage and current harmonics must be measured separately because they are relevant but not the same.However, the current also changes if the voltage changes a lot.
IEEE 519 does not involve interference (EMI) or radio-Frequency (RF) interference in electrical systems.
The IEEE 519 standard recommended guidelines for power system harmonics can be applied to individual power lines within the facility, but IEEE Standard 519 does not apply to commercial, residential or industrial power systems within the facility.
The IEEE std 519 was originally released in 1981.IEEE 519-1981 was originally applied to a static power converter.IEEE 519 was updated on 1991.IEEE 519A is a proposed revision to IEEE 519 designed to provide a better definition of PCC and describe a method for measuring the demand current after the device.IEEE Standard 519 was updated in 2014.