SALIENT FEATURES OF DESIGN :
· For the control and monitoring of each machine, a dedicated control panel (UCP) is supplied by the OEM which is located in respective PIB.
· For all Reciprocating compressors & majority of the Centrifugal compressors, the interlocks and control of the machine are implementated in UCP using Allen Bradley (PLC 5/40) PLCs.
· All machine condition monitoring & protection parameters (vibration, speed, temperature etc.) are connected to MCM system supplied by B-N (3500/3300 series).
· For steam turbine driven compressors, Woodward governer (505) is used for speed control system and Protech (203) is used for over speed protection system.
· Each UCP is connected to DCS by dual redundant serial link for remote monitoring and control (e.g. speed setpoint) by control room operators.
· ESD and MCMS provide shutdown signal to UCP (through hardwired link) based on machine protection interlocks to trip the compressor.
· For implementation of advanced control algorithams (anti surge control, load sharing, performance control etc.) for Reciprocating compressors, M/s CCC supplied controllers are used in all machines except for Borsig where Turbolog is used.
· For operator interface during start up and shutdown, a panel mounted display unit (Panelview 900) is provided on UCPs housing Allen Bradley PLCs and a table top mounted MMI is provided for UCPs containing Turbolog and CCC controllers.
· For each machine, a local control panel is provided in field for status monitoring and control by field operator. In general, these local panels are provided with the following pushbuttons and lamp indications.
a) Start PB
b) Stop PB
c) Reset PB
d) Emergency stop PB
e) Selector switch for capacity control
f) Permissive lamps
g) Status indication lamps
h) Speed Indication (as applicable)
i) Alarm Hooter
· For local indication of machine protection parameters, a local display unit (MTL make) connected to MCM system is provided in field for each compressor.
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