Fault and Disturbance Data Requirements for Automated Computer Analysis

Fault and Disturbance Data Requirements for Automated Computer Analysis
Posted: 20 Aug 1995
Primary Committee:
Power System Relaying Committee
Pages: 21

ABSTRACT

This publication describes the data required from fault recorders to facilitate automated computer analysis of various types of power system anomalies. It is expected that the analysis process would present data in more meaningful forms and distinguish between normal and abnormal operations. Sets of quantities and events are described for each of seven different application areas. This is a first work of its kind and is limited to describing the system parameters that should be acquired for each application area.

INTRODUCTION

Fault recording practices have advanced from individual substation recorders to a network of remote units which transfer fault data records to a central computer for analysis. The analysis process presently consists of examining waveforms and measuring time intervals between various events within the records. This process is labor intensive and requires considerable knowledge and skill. Manpower limitations may result in the failure to identify items needing correction before large financial losses occur. If rigorous sets of data were acquired, the analysis process could be automated to present data in more meaningful forms and distinguish between normal and abnormal operations. Abnormal operations may require additional manual analysis but much labor would be saved by not having to examine the detail in all fault records. This special publication is intended to be a companion document to the "Application of Fault & Disturbance Recording Devices for Protective System Analysis" paper as listed in the Bibliography. That paper includes oscillographic diagrams and explanations concerning most of the anomalies addressed in this document. This paper describes the information that should be available from remote units to facilitate automatic analysis at a master computer. The scope of this work is limited to informational concepts and specifically avoids placing any restriction on the format used for the data itself. Refer to ANSI/IEEE C37.lll-l99l regarding COMTRADE, the common format for transient data exchange for power systems.

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