Default Data

ADMS applications consume significantly more data elements than Outage Management System (OMS) applications. Providing all the data can be a significant effort with varying degrees of return on the effort necessary. However not all data is required by each application. In some cases, the presence of data will improve the functionality or predictions. In some cases, sufficient accuracy can be provided by defaulting data.

There are two broad approaches that can be taken to determining defaults:

1. Reasonable Values: Providing reasonable values for data will allow the application to run and provided reasonably accurate analysis. For example for a 1000 kVA Xfmr, it might be reasonable to default Leakage Reactance to 4%. For most applications, this is non-critical value and 4% represents a reasonable estimate.

2. Unreasonable Values: Some data elements are more critical and require a precise value to render any analysis as useful. In this situation, it might be best to supply a completely unreasonable value for the defaults so that the validation checks performed in DMS applications will immediately alert administrators or operators to a missing piece of data. For example it might be critical to generate overload warnings for a Power Xfmr in a substation, if the device is missing its ratings value then it would be good to set it to an unreasonable default (for example, 1kVA) so that violations are always reported and the users can see the device has unreasonable data.