IEEE Std 1782-2014 pdf download – IEEE Guide for Collecting, Categorizing, and Utilizing Information Related to Electric Power Distribution Interruption Events.
3. Data consistency and categorization for benchmarking surveys 3.1 Overview This portion of the guide presents suggestions on comparison of utilities based on a high-level categorization of interruption related data. It is not meant to limit how detailed the collection of data could be, or to say what must be collected, rather to define the minimum set of data collection categories required for benchmarking and to give consistency to those categories. When performing benchmarking studies, the differences between the collection methods, the locations, and the differences in system design can make comparison difficult. Examples of the types of items that may be relevant when performing benchmarking studies are listed below. 3.1.1 Collection methods A variety of methods available for collecting data, some listed below, could lead to issues when comparing data in benchmarking surveys.  The differences in the interruption data collection systems (ranging from manually entered paper systems to completely automated computer-based systems)  The ability to collect interruption data from the system (ranging from the substation level down to the customer service drop)
3.1.2 Location In some cases, a difference in locale could also lead to issues when comparing data in benchmarking surveys.  System characterization (rural, suburban, urban)  Climatic information (hot, cold, wet, dry, lightning, etc.) 3.1.3 System design In addition, the differences in system design could lead to issues when comparing data in benchmarking surveys.  System layout (radial, loop, two transformer station, etc.)  System placement (underground or overhead) This guide includes a minimal set of data and a consistent categorization structure necessary for comparison of distribution system performance. Presented are categories for system characterization, interruption causes, responsible systems, conditions, voltages, devices, device initiation, and restorations. 3.2 Data collected during the interruption event process As part of the interruption event collection process, the cause is collected with other pertinent information. This information should include:  The number of customers interrupted (CI)  The interruption durations, based on start date/time and restore date/time  The number of customer minutes of interruption (CMI) As the database is maintained over the years, cause information can be used in combination with the number of interruption events, the number of CI, and the number of CMI to numerous analytical ends, some of which will be discussed in this document.