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SUCCESS STORY
Hai Duong, Vietnam
1999
2002
Power
Executive Summary
With a power generating capacity of 600 MW, Pha Lai 2 is the largest coal-fired plant in Vietnam. As part of a master plan by
the Vietnam Ministry of Industry to meet rapidly rising demand for power by doubling the country’s generating capacity, the
power station was constructed at a cost of $540 million by Electric of Vietnam (EVN). Located approximately 65 km northeast
of Hanoi, Pha Lai 2 and the adjacent Pha Lai 1 power station (a Russian-built facility with eight 220 t/h coal-fired boilers and
four 110 MW turbines) are owned and operated by a wholly owned EVN subsidiary, Pha Lai Thermo Power Joint Stock Col.
(PPC). It is estimated that the two power stations supply approximately 80% of Hanoi’s power. In accordance with the Ministry
of Industry’s master plan, no more than 20% of their power is allotted to private power companies, and the remainder goes to
EVN.
In 2002, Yokogawa successfully designed, installed, and commissioned a CENTUM CS 3000 distributed control system (DCS)
for the Pha Lai 2 power station, and it has operated to date without any significant problems. Along with the Yokogawa DCS, a
full replica plant simulator was installed to provide plant operator training. The DCS and all related systems are maintained by
Yokogawa Vietnam under the terms of an annual maintenance contract.
Yokogawa CENTUM CS 3000 Ensures a Stable Supply of Power
to Vietnam’s National Grid
Central control room
ISD-SP-R148
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SUCCESS STORY
The Challenges and the Solutions
1. Steady power supply and safe operation
Power demand from the national grid is high, and the Pha Lai 2 power station covers a significant percentage of that. It needs
to provide a very steady supply of power 24 hours a day, 7 days a week, all through the year. Yokogawa’s highly reliable
CENTUM CS 3000 DCS makes this possible.
In addition, Yokogawa transmitters installed in the power island area are contributing to the high overall reliability of this
power station.
The CENTUM CS 3000 provides integrated control of the power station’s steam turbine control system, water treatment PLC,
wastewater treatment PLC, ash handling PLC, burner management system, and coal handling system, enabling the data from
these systems to be monitored in real time on graphic displays. This gives plant operators all the information they need to
take quick and effective action whenever needed, thus ensuring the safe operation of the plant and the stable supply of power
to the national grid at all times.
Unit 1 overview graphic display
Steam turbine unit 1