Practical aspects of developing load models at distribution network buses based on field measurements

This paper addresses the issues of processing field measurement data that considerably affect pre-processing, filtering and smoothing techniques for developing load models. Some specific issues inherently lies in the recorded measurements, such as the diverse amount of noise, required sampling rate, extraction of appropriate information, selection of the data (window) length, accuracy of the filtering technique and handling spontaneous load variations. These intrinsic challenges of processing filed measurement data for developing static and dynamic load models at distribution level have been addressed in this paper. Actual load responses in representative 15 substations following initiated voltage disturbances have been collected and analysed for the development of suitable load models and for the estimation of load model parameters. While highlighting the underlying issues of recording and processing real measurement data for load modelling, this work explains required modifications of the evaluation procedure while analysing real data.