EPG completed a Data Validation and Conditioning Project for the US Department of Energy (DOE) in 2012-2014 (Contract No.DE-AC03-76SF00098). This project started with an assessment of industry practices and followed that with a survey report and best practices recommendations for data validation and conditioning.
EPG developed an algorithm to condition synchrophasor data. This algorithm, called the Phasor Data Validation and Conditioning (PDVC) application, takes advantage of the characteristics of phasor data to perform validation checks on the data so it can be used reliably and with confidence. This application inputs a data stream in C37.118 format and flags data errors that occur in measurement, communication, and data management as shown in the figure below. For output, the data can be conditioned by replacing bad data with NaN (not a number) or a user designated value to prevent incorrect use of data and simplify data handling. The data can also be output with flags from the quality checks. This application uses only data and measurement characteristics, so does not rely on a power system model. This application as developed is available to designated users through the DOE.
The outcome of the study provided evidence under four different scenarios to conclude that Wind Generation does not contribute to Inertial Frequency Response. The Inertial frequency response is driven by the amount of Non-Wind Generation available online. The Non-Wind Generation is a mix sum of Total ERCOT Generation plus Spinning Reserves.