Siemens SIPROTEC 7UT613 series, Руководство пользователя

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2 Functions
332
7UT613/63x Manual
C53000-G1176-C160-2
2.24 Command Processing
A control command process is integrated in the SIPROTEC
®
7UT613/63x to coordi-
nate the operation of circuit breakers and other equipment in the power system.
Control commands can originate from four command sources:
• Local operation using the keypad on the local user interface of the device
• Operation using DIGSI
®
• Remote operation via network control center or substation controller (e.g. SICAM
®
),
• Automatic functions (e.g., using a binary input)
Switchgear with single and multiple busbars are supported. The number of switchgear
devices to be controlled is limited only by the number of binary inputs and outputs
present. High security against inadvertent device operations can be ensured if inter-
locking checks are enabled. A standard set of optional interlocking checks is provided
for each command issued to circuit breakers/switchgear.
2.24.1 Control Authorization
2.24.1.1 Type of Commands
Commands to the
System This type of commands are directly output to the switchgear to change their process
state:
• Commands for the operation of circuit breakers (asynchronous; or synchronized
through integration of the synchronism check and closing control function) as well
as commands for the control of isolators and earth switches.
• Step commands, e.g. for raising and lowering transformer taps,
• Setpoint commands with configurable time settings, e.g. to control Petersen coils.
Device-internal
Commands These commands do not directly operate binary outputs. They serve for initiating in-
ternal functions, communicating the detection of status changes to the device or for
acknowledging them.
• Manual override commands for „manual update“ of information on process-depen-
dent objects such as annunciations and switching states, e.g. if the communication
with the process is interrupted. Manually overidden objects are marked as such in
the information status and can be displayed accordingly.
• Flagging commands (for „setting“) the data value of internal objects, e.g. switching
authority (remote/local), parameter switchovers, transmission blockages and dele-
tion and presetting of metered values.
• Acknowledgment and resetting commands for setting and resetting internal buffers
or data stocks.
• Information status commands to set/delete the additional „Information Status“ item
of a process object, such as
– Acquisition blocking,
– Output blocking.