OPERATION & MAINTENANCE OF POWER PLANTS
VALVE AUTOMATION at CCGT PLANT
he new Valle de México II combined cycle power plant, situated in the northern outskirts of Mexico City, relies on the latest AUMA valve automation technology. The new 615MW combined cycle
T
gas turbine (CCGT) block has been equipped with 136 AUMA SA multi- turn electric actuators equipped with AC intelligent actuator controls and gearboxes. The operator, Comisión Federal de Electricidad (CFE), had already adopted AUMA actuators for the plant’s first power block more than 15 years ago and has been happy with their performance and reliability ever since. For the new block, local AUMA staff mounted and commissioned the
AUMA electric valve actuators have been successfully integrated into a Foundation Fieldbus environment at Valle de México II CCGT plant
actuators in the first half of 2018. The actuators were successfully integrated with the DCS in a Foundation Fieldbus environment using customised electrical connectors. The company also provided explosion-proof actuators that were installed in the vicinity of the gas turbine. AUMA has only recently expanded its global sales and service network by opening a new subsidiary in Mexico City. Jorge Guerra, director AUMA México Andina y Centroamérica, reports: “The new office confirms our commitment to provide our customers with local service and support in this commercially very active region.” l
For more information visit
www.auma.com
NEW VOLTAGE REGULATOR LAUNCHED L
eroy-Somer and Kato Engineering have introduced the D700, an automatic digital voltage regulator specially designed to meet the challenges of energy production in the digital age. The D700 includes all necessary
regulator functions, impressive smart grid capabilities and numerous additional functions that make it a highly versatile solution. Along
with network synchronisation management, the new product features multiple regulation modes, including regulation based on the power factor at the point
of delivery or at generator output (especially for networks operating in parallel). Profile monitoring and various Grid Code regulation specifications can thus potentially be programmed directly into the unit. For the first time, all excitation types are supported up to 25A in continuous
operation (50A in the event of short circuit). In addition, the D700 can control an external power module that makes it possible to offer static excitation systems up to 1,500 A.
A special
double regulation board is also available to ensure total system redundancy.
The new tool also includes multiple solutions based on expertise and knowledge drawn from Nidec alternators. These functions, such as redundant power bridge, curve functions, simplified load sharing and excitation limits can be used to improve global system security. The solution also includes many components that make it flexible: a data logger, programmable logic, equalisation and synchronisation, remote regulation, communications bus, current compensation, and “black start” capability. The D700 is designed to integrate
easily into complex systems (including networked systems). In some cases, it can even control certain application processes to avoid the need for an additional system (such as an automaton). The control software is intuitive, and easy to configure no matter what the requirements are. l
For more information visit
www.lrsm.co/d700
www.engineerlive.com 23
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