Operating Modes With Plc Equipment; Overview; Single Purpose Operation; Multi-Purpose Operation - Siemens SWT 3000 Equipment Manual

Functional Description

2.3 Operating Modes with PLC Equipment

2.3 Operating Modes with PLC Equipment

Overview

2.3.1
Power system protection signals can be transmitted over the high-voltage overhead line. These signals are
protected within the PLC equipment. For this purpose, the devices of the SWT 3000 system are connected to
special inputs and outputs of the PLC unit. If you are using a PowerLink system, the integration of SWT 3000 is
only possible in a PowerLink system with CSPi.
When using PLC equipment, several variants of teleprotection signaling are possible as described in the
following cases:
•
Single Purpose (SP) operation
•
Multi-Purpose (MP) operation
•
Alternate Multi-Purpose (AMP) operation

Single Purpose Operation

2.3.2
In this operating mode, the transmission band of the PowerLink is used exclusively for teleprotection
signaling. The greatest transmission distances are reachable in this mode with maximum security against
impulse noise and minimum signal transmission time.
The following equipment combinations are possible:
•
SWT 3000 remote with VF or optical connection to PowerLink
•
SWT 3000 integrated in PowerLink

Multi-Purpose Operation

2.3.3
In this operating mode, the teleprotection signals are simultaneously transmitted with voice and data signals.
The distribution of the available transmission power (between the services, which must be transmitted) results
in shorter transmission ranges. The command transmission times are the same as in single purpose operation.
The following equipment combinations are possible:
•
SWT 3000 remote with VF or optical connection to PowerLink
•
SWT 3000 integrated in the PowerLink

Alternate Multi-Purpose Operation

2.3.4
Normal operation
Protection mode
The following equipment combinations are possible:
•
SWT 3000 remote at short distance with VF coupling to PowerLink
Keep the connecting cable between SWT 3000 and PowerLink as short as possible.
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In this operating mode, the transmission band is used for the transmission of
voice (F2) and data, or Data Pump (DP) as long as there is no protection case. In
the idle state, that is, the high-voltage system is operating the signals of all serv-
ices including the guard tone are transmitted simultaneously. The pilot of the PLC
system is used as the guard tone in this operating mode.
While the protection command is being transmitted, the voice or DP transmission
is interrupted. This operating mode saves frequency space but results in shorter
transmission ranges and higher signal transmission times than with single
purpose or multi-purpose operation.
Smart Communication, SWT 3000 Teleprotection, Equipment Manual
C53000-G6040-C605-1, Edition 03.2020