Control; Measurement; Disturbance Recorder; Event Log - ABB RELION 630 Series Product Manual

Generator Protection and Control
REG630
Product version: 1.3

5. Control

The protection relay incorporates local and remote control
functions. The protection relay offers a number of freely
assignable binary inputs/outputs and logic circuits for
establishing bay control and interlocking functions for circuit
breakers and motor operated switch-disconnectors. The
protection relay supports both single and double busbar
substation busbar layouts. The number of controllable primary
apparatuses depends on the number of available inputs and
outputs in the selected configuration. Besides conventional
hardwired signaling also GOOSE messaging according to IEC
61850-8-1 can be used for signal interchange between
protection relays to obtain required interlockings.
Further, the protection relay incorporates a synchro-check
function to ensure that the voltage, phase angle and frequency
on either side of an open circuit breaker satisfy the conditions
for safe generator connection to the network.

6. Measurement

The protection relay continuously measures the phase currents,
the symmetrical components of the currents and the residual
current. The protection relay also measures phase and phase-
to-phase voltages, symmetrical components of the voltages
and the residual voltage. In addition, the protection relay
monitors active and reactive power, power demand value over
a user-selectable pre-set time frames as well as cumulative
active and reactive energy of both directions. Line frequency,
the thermal overload of the protected object, and the phase
unbalance value based on the ratio between the negative
sequence and positive sequence current are also calculated.
Cumulative and averaging calculations utilize the non-volatile
memory available in the protection relay. Calculated values are
also obtained from the protection and condition monitoring
functions of the protection relay.
The values measured are accessed locally via the front-panel
user interface of the protection relay or remotely via the
communication interface of the protection relay. The values are
also accessed locally or remotely using the Web-browser
based user interface.

7. Disturbance recorder

The protection relay is provided with a disturbance recorder
featuring up to 40 analog and 64 binary signal channels. The
analog channels can be set to record the waveform of the
currents and voltage measured. The analog channels can be
set to trigger the recording when the measured value falls below
or exceeds the set values. The binary signal channels can be
set to start a recording on the rising or the falling edge of the
binary signal. The binary channels are set to record external or
internal relay signals, for example the start or operate signals of
the protection functions, or external blocking or control signals.
Binary relay signals such as a protection start or trip signal, or
an external relay control signal over a binary input can be set to
ABB
trigger the recording. In addition, the disturbance recorder
settings include pre- and post triggering times.
The disturbance recorder can store up to 100 recordings. The
number of recordings may vary depending on the length of the
recording and the number of signals included. The disturbance
recorder controls the Start and Trip LEDs on the front-panel
user interface. The operation of the LEDs is fully configurable
enabling activation when one or several criteria, that is,
protection function starting or tripping, are fulfilled.
The recorded information is stored in a nonvolatile memory and
can be uploaded for subsequent fault analysis.

8. Event log

The protection relay features an event log which enables
logging of event information. The event log can be configured to
log information according to user predefined criteria including
relay signals. To collect sequence-of-events (SoE) information,
the protection relay incorporates a nonvolatile memory with a
capacity of storing 1000 events with associated time stamps
and user definable event texts. The nonvolatile memory retains
its data also in case the protection relay temporarily loses its
auxiliary supply. The event log facilitates detailed pre- and post-
fault analyses of faults and disturbances.
The SoE information can be accessed locally via the user
interface on the protection relay's front panel or remotely via the
communication interface of the protection relay. The
information can further be accessed, either locally or remotely,
using the web-browser based user interface.
The logging of communication events is determined by the used
communication protocol and the communication engineering.
The communication events are automatically sent to station
automation and SCADA systems once the required
communication engineering has been done.

9. Disturbance report

The disturbance report includes information collected during
the fault situation. The report includes general information such
as recording time, pre-fault time and post fault time. Further,
the report includes pre-fault magnitude, pre-fault angle, fault
magnitude and fault angle trip values. By default, the
disturbance reports are stored in a nonvolatile memory. The
numerical disturbance report can be accessed via the local
front panel user interface. A more comprehensive disturbance
report with waveforms is available using PCM600.

10. Circuit-breaker monitoring

The condition monitoring functions of the protection relay
constantly monitors the performance and the condition of the
circuit breaker. The monitoring comprises the spring charging
time, SF6 gas pressure, the travel-time, operation counter,
accumulated energy calculator, circuit-breaker life estimator
and the inactivity time of the circuit breaker.
1MRS757583 C
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