Variable frequency drives supplied for retrofit project

Siemens is supplying two Robicon Perfect Harmony VFDs to the Otter Tail Power Company for their plant in South Dakota as part of a $490 million environmental retrofit project that is scheduled for completion by 2015.

12/19/2012


Siemens, in partnership with Fougner Engineered Sales, has been selected by Otter Tail Power Company to provide two Robicon Perfect Harmony variable frequency drives (VFD) for environmental upgrades at the Big Stone Plant, a coal-fired power plant that the company operates in Big Stone City, South Dakota.

In May, plant owners Otter Tail Power Company, Montana-Dakota Utilities Co., and NorthWestern Energy, approved a plan calling for $490 million in environmental retrofits, including a new air-quality control system to be commissioned within five years of the Environmental Protection Agency's approval of the South Dakota Regional Haze State Implementation Plan.

Two Siemens Robicon Perfect Harmony WCIII drives will support a new dry scrubber to reduce sulfur dioxide. Plans also call for a selective catalytic reduction (SCR) unit to reduce emissions of nitrogen oxide. 

Siemens Robicon Perfect Harmony Drives use a series of low-voltage cells linked together and scaled precisely for a wide range of voltage and output power. The cell bypass ensures automatic bypass of a failed power cell in less than 500 milliseconds and instead of shutting down the entire drive, a process-tolerant protection system (ProToPS) provides a hierarchical system of warnings. This control strategy allows time to evaluate the situation and respond appropriately. This concept also enables easy access to drive components for scheduled maintenance. Siemens VFDs also meet IEEE 519 standards for input power harmonic distortion.

Otter Tail Power Company estimates that retrofits to the 475-MW Big Stone Plant, in operation since 1975, will be completed by mid-2015.

Siemens

usa.siemens.com 



No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Additive manufacturing advancements; Machine vision enhances robotics; Fieldbus evolution; Process safety; Advice from System Integrators of the Year; Road to IANA
Salary and career survey: Benchmarks and advice; Designing controls; Remote data collection, historians; Control valve advances; Hannover Messe; Control Engineering International
System integration: Best practices and technologies to help; Virtualization virtues; Cyber security advice; Motor system efficiency, savings; Product exclusives; Road to Hannover
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.
PLCs, robots, and the quest for a single controller; how OEE is key to automation solutions.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

The digital oilfield: Utilizing Big Data can yield big savings; Virtualization a real solution; Tracking SIS performance
Getting to the bottom of subsea repairs: Older pipelines need more attention, and operators need a repair strategy; OTC preview; Offshore production difficult - and crucial
Digital oilfields: Integrated HMI/SCADA systems enable smarter data acquisition; Real-world impact of simulation; Electric actuator technology prospers in production fields
click me