Hitachi Relion 670 Series Product Manual page 48

Line differential protection RED670
Version 2.2
• 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
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
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
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
48
boards and to supervise the switching operation and
position.
Circuit switch SXSWI
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.
Reservation function QCRSV
The purpose of the reservation (QCRSV) function is
primarily to transfer interlocking information between IEDs
in a safe way and to prevent double operation in a bay,
switchyard part, or complete substation.
Reservation input RESIN
The Reservation input (RESIN) function receives the
reservation information from other bays. The number of
instances is the same as the number of involved bays (up to
60 instances are available).
M13531-3 v4
Bay control QCBAY
The Bay control (QCBAY) function is used together with
Local remote and local remote control functions to handle
the selection of the operator place per bay. QCBAY also
provides blocking functions that can be distributed to
different apparatuses within the bay.
Proxy for signals from switching device via GOOSE
XLNPROXY
The proxy for signals from switching device via GOOSE
(XLNPROXY) gives an internal representation of the
position status and control response for a switch modelled
in a breaker IED. This representation is identical to that of
an SXCBR or SXSWI function.
GOOSE function block to receive a switching device
GOOSEXLNRCV
The GOOSE XLN Receive component is used to collect
information from another device's XCBR/XSWI logical node
sent over process bus via GOOSE. The GOOSE XLN
Receive component includes 12 different outputs (and their
respective channel valid bits) with defined names to ease
the 61850 mapping of the GOOSE signals in the
configuration process.
M13486-3 v10
Local remote LOCREM/Local remote control
LOCREMCTRL
The signals from the local HMI or from an external local/
remote switch are connected via the function blocks local
remote (LOCREM) and local remote control
(LOCREMCTRL) to the Bay control (QCBAY) function block.
M13489-3 v6
The parameter ControlMode in function block LOCREM is
set to choose if the switch signals are coming from the local
HMI or from an external hardware switch connected via
binary inputs.
© 2017 - 2022 Hitachi Energy. All rights reserved
1MRK 505 379-BEN R
M16492-3 v6
M13506-3 v5
M16501-3 v6
M13447-3 v8
GUID-11F9CA1C-8E20-489B-822B-34DACC59553A v1
GUID-5AC7DE11-CB95-4565-A8AE-FB23D59FD717 v1
M17086-3 v11
Hitachi Energy