IEEE Std 1159-2019 pdf download
IEEE Std 1159-2019 pdf download.IEEE Recommended Practice for Monitoring Electric Power Quality.
total inlerharnionk distortion: The ratio of the root mean square of the harmonic content. ctmsidenng lnterharinomc components up to the Oth order and specifically excluding hannonics. expressed as a percent of the fimdamvnul Interhannonie components of order greater thati 50 may be included when necessary.
oItage change: A ranation of the root.nlean.square (rms) or peak salue of a voltage between two Consecut,%c lexcls sustauied for definite bw unspecified durations
oltage fluctuation: A series ofvoltage changes or a cyclical variation of the voltage envelope
voltage Intenuption: The disappearance of the supply voltage on one or more phases It is usually qualileed by an additional term indicating the duration of the iniernipuon (e.g.. momentary, temporary. sustaineth.
ssaxcform dlstorrion: A r4e-akly•sLate desiation from an ideal sine sase ul power frequerbey principally charactcnied by the spectral contein of the deviation.
4. Power quality phenomena
4.1 Introduction
The term poair quaiv I refers to a wide variety of electromagnetic phenomena that charactenze the voltage and current at a given time and at a given location on the power system. This clause amplifies the definitions of Clause 3 and the glossary in Annex C by prox iding technical descriptions and examples of the pnncipal electromagnetic phenomena causing power quality problems.
The increasing application of electronic equipment that can cause electromagnetic disturbances, or that can be sensitive to these phenomena. has heightened the interest in power quality in reCent years. Accompanying the increase in operation proNeins has been a vanety of attempts to describe thc phenomena, L)nftwtunarely. di? lèrent segments of the electronics and power systems community have utilictt different terminologies to describe electromagnetic exents. This clause expands the terminology that should be used by the power quality community to describe these common exents. The clause also explains why conimonly used terminology in other communities should not be used by the power quality community
4.2 Electromagnetic compatibility
This recommended practice uses the electromagnetic compatibility approach to describe power quality phenomena The clectroniagrielie compatibility appruch has hecti accepted by the international ciirtitnunhty in Internanonal Ekcrotechnical (‘ommission (IR’) standards produced by IEC Technical Committee 77. The reader is referred to Clause 3, the gloo.ary in Annex . and The IFFF Standards OnIinc for the definitions of electromagnetic compatibility and related enmi. UIE-DWG-3-92-G [K53] proxides an excellent userviess of the electromagnetic compatibility concept and associated ILL documents.
4.3 General classification of phenomena
The I EU standard addresses the conducted electrical parameters shown m Tablc I The remis high
Irequency and loss tequcncy are not defined in tCrms of a specific frequency range, but instead arc intended to indicate the relative difference in principal frequency content of the phenomena listed in these categories.
This reconimended practice contains a Pew additional terms related to the lU. terminology the term sag is used in the power quality community as a synonym to the IEC term dip. Similarly. the category short- duration siinations is used to reler to voltage dips and short interruptions. The term swell was introduced as an inverse to sug (dip). The calegory long-duraion variation was added lo deal with the limits in ANSI C84.1-2016 [B2]
The category noise was added to deal with broadband conducted phenomena. The category waveform
distortion is used as a container category for the harmonics, interharmonics, and de in ac networks phenomena in 1EC 61000-4-7:2009 [B15] as well as an additional phenomenon from IEEE Std 519-2014 [B27] called notching, Table 2 shows the calegorization of electromagnetic phenomena used for the power quality community.
The phenomena listed in Table I can be deseribed further by listing appropriate atributes (sce IEC 61000-2-5-
2017 [B13]). For steady-state phenomena, the fllowing atibutes can be used:
– Amplitude
– Frequency
– Spectrum
– Modulation
一Source impedance
一Notch depth
– Notch area
For nonsteady-state phenomena, other atributes may be required as follows:
– Rate of rise
– Ampltude
– Duration
– Spectrum
– Rate of occurtenee
– Energy potential
– Source impedanee.
