Technical Data; Disturbance Recorder; Introduction; Principle Of Operation - ABB Relion 670 Series Technical Reference Manual

Section 13
Monitoring
13.10.5
13.11
13.11.1
13.11.2
532

Technical data

Table 366: technical data
Function
Buffer capacity

Disturbance recorder

Introduction

The Disturbance recorder function supplies fast, complete and reliable information
about disturbances in the power system. It facilitates understanding system
behavior and related primary and secondary equipment during and after a
disturbance. Recorded information is used for different purposes in the short
perspective (for example corrective actions) and long perspective (for example
functional analysis).
The Disturbance recorder acquires sampled data from selected analog- and binary
signals connected to the Disturbance report function (maximum 40 analog and 96
binary signals). The binary signals available are the same as for the event recorder
function.
The function is characterized by great flexibility and is not dependent on the
operation of protection functions. It can record disturbances not detected by
protection functions. Up to ten seconds of data before the trigger instant can be
saved in the disturbance file.
The disturbance recorder information for up to 100 disturbances are saved in the
IED and the local HMI is used to view the list of recordings.

Principle of operation

Disturbance recording (DR) is based on the acquisition of binary and analog
signals. The binary signals can be either true binary input signals or internal logical
signals generated by the functions in the IED. The analog signals to be recorded are
input channels from the Transformer Input Module (TRM), Line Differential
communication Module (LDCM) through the Signal Matrix Analog Input (SMAI)
and possible summation (Sum3Ph) function blocks and some internally derived
analog signals. For details, refer to section
Disturbance recorder collects analog values and binary signals continuously, in a
cyclic buffer. The pre-fault buffer operates according to the FIFO principle; old
data will continuously be overwritten as new data arrives when the buffer is full.
The size of this buffer is determined by the set pre-fault recording time.
Maximum number of analog inputs
Maximum number of disturbance reports
"Disturbance report
1MRK 505 208-UEN B
Value
30
100
DRPRDRE".
Technical reference manual