ABB REG670 - Control

12. Control
Synchrocheck, energizing check, and synchronizing
SESRSYN
M12480-3 v16
The Synchronizing function allows closing of asynchronous
networks at the correct moment including the breaker closing
time, which improves the network stability.
Synchrocheck, energizing check, and synchronizing
(SESRSYN) function checks that the voltages on both sides of
the circuit breaker are in synchronism, or with at least one
side dead to ensure that closing can be done safely.
SESRSYN function includes a built-in voltage selection
scheme for double bus and 1½ breaker or ring busbar
arrangements.
Manual closing as well as automatic reclosing can be
checked by the function and can have different settings.
For systems, which can run asynchronously, a synchronizing
feature is also provided. The main purpose of the
synchronizing feature is to provide controlled closing of circuit
breakers when two asynchronous systems are in phase and
can be connected. The synchronizing feature evaluates
voltage difference, phase angle difference, slip frequency and
frequency rate of change before issuing a controlled closing
of the circuit breaker. Breaker closing time is a setting.
However this function can not be used to automatically
synchronize the generator to the network.
Apparatus control APC
M13444-3 v15
The apparatus control functions are used for control and
supervision of circuit breakers, disconnectors and earthing
switches within a bay. Permission to operate is given after
evaluation of conditions from other functions such as
interlocking, synchrocheck, operator place selection and
external or internal blockings.
Apparatus control features:
• Select-Execute principle to give high reliability
• Selection function to prevent simultaneous operation
• Selection and supervision of operator place
• Command supervision
• Block/deblock of operation
• Block/deblock of updating of position indications
• Substitution of position and quality indications
• Overriding of interlocking functions
• Overriding of synchrocheck
• Operation counter
• Suppression of mid position
Two types of command models can be used:
• Direct with normal security
• SBO (Select-Before-Operate) with enhanced security
Normal security means that only the command is evaluated
and the resulting position is not supervised. Enhanced
security means that the command is evaluated with an
additional supervision of the status value of the control
object. The command sequence with enhanced security is
always terminated by a CommandTermination service
primitive and an AddCause telling if the command was
successful or if something went wrong.
Control operation can be performed from the local HMI with
authority control if so defined.
Interlocking
M13531-3 v4
The interlocking function blocks the possibility to operate
primary switching devices, for instance when a disconnector
is under load, in order to prevent material damage and/or
accidental human injury.
Each apparatus control function has interlocking modules
included for different switchyard arrangements, where each
function handles interlocking of one bay. The interlocking
function is distributed to each IED and is not dependent on
any central function. For the station-wide interlocking, the
IEDs communicate via the system-wide interbay bus (IEC
61850-8-1) or by using hard wired binary inputs/outputs. The
interlocking conditions depend on the circuit configuration
and apparatus position status at any given time.
For easy and safe implementation of the interlocking function,
the IED is delivered with standardized and tested software
interlocking modules containing logic for the interlocking
conditions. The interlocking conditions can be altered, to
meet the customer’s specific requirements, by adding
configurable logic by means of the graphical configuration
tool.
Switch controller SCSWI
M13486-3 v8
The Switch controller (SCSWI) initializes and supervises all
functions to properly select and operate switching primary
apparatuses. The Switch controller may handle and operate
on one multi-phase device or up to three one-phase devices.
Circuit breaker SXCBR
M13489-3 v6
The purpose of Circuit breaker (SXCBR) is to provide the
actual status of positions and to perform the control
operations, that is, pass all the commands to primary
apparatuses in the form of circuit breakers via binary output
boards and to supervise the switching operation and position.
Circuit switch SXSWI
M16492-3 v6
The purpose of Circuit switch (SXSWI) function is to provide
the actual status of positions and to perform the control
operations, that is, pass all the commands to primary
apparatuses in the form of disconnectors or earthing switches
via binary output boards and to supervise the switching
operation and position.
1MRK 502 074-BEN A
Generator protection REG670 2.2 and Injection equipment REX060,
REX061, REX062
Product version: 2.2.1
ABB 31