Realtime-Substitution Mechanisms for Missing Field Measurements – Field-approved Methods and Evaluation Results

Abstract

Measurement values become more and more important for the correct behaviour of automation systems in several domains. In low voltage grids, functions such as voltage control, topology identification or validation, as well as other monitoring functions demand for reliable measurement data. During field operation several failures might occur (e.g., communication errors, erroneous measurement devices) resulting in unavailable values. To ensure trustworthy functionality of the automation systems in case of failures, substitution values can be used instead of missing field values. In this paper, methods for calculating substitution values are presented, as well as the demonstration of the implemented method in the field, followed by an elaboration of the results.