Protection Functions - ABB RELION 630 Series Product Manual

Generator Protection and Control
REG630
Product version: 1.3
Table 2. Functions used in preconfigurations, continued
Description
Sequence voltage measurement
Disturbance recorder function
Analog channels 1-10 (samples)
Analog channels 11-20 (samples)
Analog channels 21-30 (calc. val.)
Analog channels 31-40 (calc. val.)
Binary channels 1-16
Binary channels 17-32
Binary channels 33-48
Binary channels 49-64
Station communication (GOOSE)
Binary receive
Double point receive
Interlock receive
Integer receive
Measured value receive
Single point receive
n = total number of available function instances regardless of the preconfiguration selected
1, 2, ... = number of included instances

4. Protection functions

REG630 offers wide protection functionality for synchronous
generators against internal faults and abnormal conditions of
external systems. The generator management protection relay
features non-directional and directional overcurrent and earth-
fault protection functions, over- and undervoltage protection
functions and specific functions for the protection of
generators, for example, voltage-controlled overcurrent
protection, reverse/directional overpower protection,
differential protection, underexcitation protection,
overexcitation protection, high-impedance-based restricted
earth-fault protection, underimpedance protection (line back-
up protection), thermal overload protection, negative-phase
sequence protection, frequency protection and underpower
protection. Rotor earth-fault protection function to be used with
a separate fundamental frequency voltage injection device is
also included.
REG630 incorporates third harmonic-based stator earth-fault
protection as an optional function. Transformer differential
protection for two-winding transformers is another optional
function applicable for generator-transformer blocks.
Low-voltage ride-through, reactive power undervoltage and
voltage vector shift protection can be used to ensure grid
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stability and reliability, and thus avoid grid collapse. The low-
voltage ride-through protection allows monitoring of distributed
generation during low-voltage or fault ride-through, in order to
determine whether and when to disconnect from the grid. A
reactive power undervoltage protection (QU) can be used at
grid connection point of distributed power generation units. The
voltage vector shift protection detects islanding from the grid. It
measures continuously the duration of voltage cycle. At the
instance of islanding, the duration of measured voltage cycle
becomes shorter or longer than the previous one, i.e. the
measured voltage cycle shifts with time.
1MRS757583 C
A n
1 1
1 1
- 1
- 1
- 1
1 1
1 1
1 1
1 1
- 10
- 32
- 59
- 32
- 60
- 64
ABB