INTEA Automatizacija

POWER GENERATION & DISTRIBUTION SYSTEM - “OMAR” in Al Furat oil fields - Omar, Syria

Power System Overview
Omar Power System is a standalone system comprising electrical power generation, distribution and consumption. It’s purpose is to provide extremely reliable power supplying for oil drilling, processing and shipping facilities. The owner is Al Furat Petroleum Company (AFPC) Syria. Area covered by the distribution network is some 100 km2. The power system includes: 18 distributed generators with dual fuel turbines (gas/diesel) and total of 200MW power, double 66kV overhead lines to 4 major remote sites, about 75 large consumers and 400 major devices (transformers, breakers, motors, etc) requiring supervision and automatic control..

Distributed Control System Requirements
ABB Omar DCS acts as a single and integral system regardless of it’s wide distribution - up to 55 km.

DCS controls/supervises:

18 generators
250 breakers
40 transformers
30 valves
30 motors
15 software PID regulators
8200 physical I/O signals
2500 serial I/O signals.

Main tasks of ABB DCS in Omar are:

Supervision & Control of all major Power System equipment from central place in Omar Control Building - Control Room.
Ensuring quality - voltage and frequency stability.
Ensuring availability - load shedding functions preventing black-outs and disturbances in vital production facilities.
Ensuring efficiency - coordination of generators, optimizing and fault finding tools (reports, trends, process overviews, event & alarm lists, system status, system list, ...).
Integration of 11 external control subsystems in the DCS (various dedicated PLCs) via serial links.

Automation and control system

Equipment
Power generation and distribution in “AFPC Omar” is monitored and controlled by ABB Advant products family equipment. (Click to enlarge the block diagram). “Omar” utilises the following:

Process controllers - AdvantController 450 (9 units)
Operator stations - AdvantStation 500 OS - (10 units) • X terminals - (2 units)
Information Management Station - AdvantStation515 IMS - (2 units)
Control network MasterBus 300, Plant Network TCP/IP, MODBUS serial links etc.
Event/alarm printers, hardcopy printers and report printers.

Scope
Entire power system is controlled by process controllers and runs fully automatic. Each part of it can be controlled and monitored from any operator station. Control includes: breakers, transformers, motors and whole subsystems like Fuel (gas/diesel) system, Instrument air, Water treatment, Fire water, etc .

POWER MANAGEMENT SYSTEM (PMS)
PMS is a group of dedicated programs in ABB DCS controller.
Main PMS functions are:

monitoring interconnection status of the power system
coordination of generators, frequency/voltage regulation
calculation of consumption per load, island, area and site
monitoring spare capacity of running generator sets
shedding (disconnecting) preselected loads within 100ms
disabling start of large loads if exceeding spare capacity
monitoring and recording power consumption peaks
warning and suggesting messages for the operator
reports: production, consumption, running hours, peaks, ...

Features
DCS includes features like: redundancy (at all levels), MODBUS serial links, GPS time sinchronization, long term data storage, alarm acknowledge recording, data logging and trend displays, operator’s multilevel authority system (login + password), training system,...

Operator screen example 1
“OM_HV2001L” presents electrical distribution detail - 20kV left busbar in Omar with 2 “Frame 6” generators.
Measured values are updated each few seconds.
Indications of breakers position and status are simple and self-explanatory.
To change breaker position, operator selects it on the screen and than uses keyboard (or track-ball unit) to issue relevant open-close command.

Operator screen example 2
“Turbine and Generator overview” shows actual process values and main parameters. Status is indicated with texts and symbols. Operator’s orders are issued from the screen/keyboard e.g.: to start/stop the turbine operator merely acts on “Start” screen push-button in group “Master control”.

Intea's contribution

Scope - general

application analysis
level 1 software (type-circuits and data-base) multiplying and implementation
load shedding concept design
level 2 software (logic & sequences) “process facilities” and
Power Management System (excl. generators control and coordination)
operator stations - customising and display design
simulation programs
factory acceptance tests with the client
hardware installation (partly)
commissioning & start-up
training

Scope - sections
Intea was responsible for configuration and application software in all Process Controllers, Operator Stations and Information Management Stations, except generators (control and coordination) package.

Duration and results
In the period December 1996 - July 1997, 5 Intea’s engineers worked on site (in shifts) until successful handover. INTEA’s work was recognized, by ABB project leader/manager and end-user AFPC, as outstanding and highly professional.

Post start-up activities - Intea

October 1998. - “Residence engineering” contract. Two Intea’s engineers (back-to-back) during 6 months held operation and maintenance training courses for the client.
May 1999. - “Y2K upgrade” project. DCS’s Year 2000 compliance ensured.

Project expansions awarded to Intea

February 2000. - “Maleh expansion” project. New AC450 programming and integration in Omar system.
April 2000. - “Omar extension” project. Major DCS modifications to support: new “Frame 6” generator, new load shedding principle, new process sections,....
May 2002. - “Tanak extension” project. Major DCS modifications to support: 2 new busbars, 22 new objects, 6 new shedding loads, (4 start inhibitions). Modifications: node 7, node 3, OS. Application extension on OMAR location. Modifications: node 1 and node 3.
April 2003. “Omar GT505 project”. New AC450 programming and integration in Omar system to support additional Frame 6 generator.

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