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further strengthen Alstom’s position for
clean power generation, via the introduction
of new technologies to monitor
and control air quality in real-time in
conventional plants and new clean coal
plants that may be equipped with carbon
capture and storage. With the development
of carbon trading schemes, plant
management solutions will require flexible
integration with carbon registries
and markets.
emB focuses its expertise on four key
areas of technology:
■ Automation - including -- plant DCS,
machine control & instrumentation
■ plant management - including plant &
dispatch optimization, asset condition
monitoring and simulation
■ grid connection & substation engineering
- including isolated phased
bus ducts
■ power electronics - including excitation,
automated voltage regulation
and reactive power control.
emB offers turnkey energy management
solutions to optimize energy efficiency
across the entire energy value chain,
such as in the following areas:
■ Plant efficiency increased through effective
automation and control of the
plants as well as new suites of power
plant management software applications
to manage plant scheduling,
plant asset management as well as
real-time plant simulation.
Figure 1: Combined cycle power plant - Example architecture.
Video Wall
Site Network Operator
Core RT
Historian
& IMS
Engineering
Stations
Servers
Servers
workstation
Unit Network
HRSG & WSC
Controller
EMS, PPS,
IMS Reports
BOP & Electrical
Controller
■ plant availability increasing plant operational
flexibility to provide the proper
amount of power at the right time to
the grid. this means providing the
ability to ramp power up and down
several times a day.
■ Power quality enabling customers
to deliver the desired power quality,
whether related to grid frequency (active
power) or voltage management
(reactive power).
Within emB, Alstom has designed a
complete product line for control systems
called ALSpA. Alstom’s ALSpA
CONtROpLANt DCS system is dedicated
to the power generation market.
ALSPA
The ALSPA system consists of a flexible
and open distributed architecture and is
based on specific hardware components
and standard communication networks.
ALSpA products support core functions
for plant operation, and thus benefit from
multiple safety and availability features
such as self-testing, redundancy in controllers
and communications, synchronization
and time stamping to 1 ms, fault
tolerance, and continued autonomous
operation in the event of the loss of control
room equipment. ALSPA products
can be used for the DCS (thermal, hydro,
nuclear, etc.) and for machine control.
For machine control, ALSpA includes the
following controls:
■ ALSPA field controller
Condition
Monitoring
Automation cell
Multi-Function
Controllers
ALSPA
Field Networks
I/O Controllers
OLC
CLC
Protections
Steam Turbine
Controller
Web
Thin Clients
OLC
CLC
WAN
Protections
Gas Turbine
Controller
Firewall
Technology
■ Boiler control and protection and
burner management system: Controflame
■ Steam turbine controller: Controsteam
■ gas turbine controller: Controgas
■ generator controller, AVR and excitation:
Automatic voltage regulator:
dedicated to the excitation regulation
of AC generator: Controgen.
the control system is built around three
major components:
■ the control room HmI with its software
and hardware,
■ the engineering tool manages a
consistent engineering design of the
complete power plant including: DCS,
machine control and simulator with
single point of entry and a unique database.
■ perform the control and protection
functions and are connected to the
process. the multifunction controllers
and field controllers offer a number
of advantages e.g. reduction of field
cabling, tolerance to failures and easy
expansion of the system.
All these elements are connected by fast
ethernet networks (Figure 1).
Networking inside the ALSPA
product
the site network being mainly located in
the control room, has limited industrial
constraints. It is generally based on a
standard Fast ethernet switched network.
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automotion 07/2009
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