IEEE Std 1159-2019 pdf download – IEEE Recommended Practice for Monitoring Electric Power Quality.
4.1 Introduction The term power quality refers to a wide variety of electromagnetic phenomena that characterize 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 providing technical descriptions and examples of the principal 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 problems has been a variety of attempts to describe the phenomena. Unfortunately, different segments of the electronics and power systems community have utilized different terminologies to describe electromagnetic events. This clause expands the terminology that should be used by the power quality community to describe these common events. The clause also explains why commonly 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 electromagnetic compatibility approach has been accepted by the international community in International Electrotechnical Commission (IEC) standards produced by IEC Technical Committee 77. The reader is referred to Clause 3, the glossary in Annex C, and The IEEE Standards Dictionary Online for the definitions of electromagnetic compatibility and related terms. UIE-DWG-3-92-G [B53] provides an excellent overview of the electromagnetic compatibility concept and associated IEC documents. 4.3 General classification of phenomena In IEC 61000-2- 5:2017 [B13], the IEC classifies electromagnetic phenomena into several groups as shown in Table 1.
4.4 Detailed descriptions of phenomena This subclause provides more detailed descriptions for each of the power quality variation categories presented in Table 2. These descriptions provide history regarding the terms currently in use for each category. Typical causes of electromagnetic phenomena in each category are introduced; additional information and interpretation can be found in Clause 8 One of the main reasons for developing the different categories of electromagnetic phenomena is that there are different ways to solve power quality problems depending on the variation that is of concern. The different solutions available are discussed for each category. There are also different requirements for characterizing the phenomena using measurements. It is important to be able to classify events and electromagnetic phenomena for analysis purposes. The measurement requirements for each category of electromagnetic phenomena are discussed.