Emersons Scenario Simulation reduces plant startup time
ERRP, a truncated combined cycle facility, went into operation several years ago as part of a major improvement project at Con Edisons East River energy complex. The project was necessary to maintain reliable and reasonably priced steam supply and electricity for Con Edisons customers throughout New York City.
The ERRP facility uses two General Electric combustion turbines connected to two heat recovery steam generators (HRSGs) and a steam ring header. This unique configuration provides steam at 3.2 million lb./hr. for dispatch into Manhattan, where it is used as a key source for the district heating system. Emersons Ovation technology provides control for a number of critical processes used in this 360-MW plant.
Con Edisons significant investment in this plant made safe and timely commissioning and startup crucial. Because the East River facility is located in Manhattan, Con Edison also had to adhere to strict environmental constraints, such as noise levels during construction, as well as emissions levels during plant commissioning, startup and operation.
In order to help ensure optimal operation of the East River plant, Con Edison sought a way to efficiently train their operators using equipment and plant models duplicating the repowered East River plant prior to actual commissioning and startup. Con Edison also wanted a tool to help them verify and validate new control logic prior to its installation into the plants Ovation control system.
Based on a two-decade relationship of proven performance, Con Edison partnered with Emerson to provide the right solution. Emersons Scenario simulation technology was selected to monitor and control the unique processes associated with the new technology employed at the East River site. To ensure optimal plant operation, Con Edison engineers and operators teamed with Emerson to configure a high-fidelity Scenario solution.
ERRPs Scenario simulation consists of actual plant control software and duplicate workstations that mimic the East River control room. Scenario was used extensively to train operators, formerly familiar with traditional boiler/steam turbine plant configurations, on the operation of the new truncated combined cycle plant. Through utilization of Emersons simulation technology, operators also became well versed on using the microprocessor-based system, which unlike the previously installed hard-wired controls, enables operators to more quickly recognize and react to abnormal plant process situations. Scenario simulation was also used to develop optimum operator methodology that is documented in the plants operating procedures.
During the simulation design phase and prior to plant startup, East Rivers operators and engineers used Scenario to evaluate both steady state and transient conditions based on plant design criteria. Results of these evaluations provided Con Edison engineers with a better understanding of process dynamics and enhanced troubleshooting tactics, leading to development of accurate control strategies under normal and abnormal operating conditions.
Con Edison also used Scenario to test interfaces of an extensive amount of third-party equipment connected to the Ovation control system, such as the GE Mark V turbine control system and PLC networks for the burner management, gas compressor and water treatment systems. Pre-testing of the data links helped to further reduce the plants commissioning time.
Use of Scenario helped to ensure that Con Edisons investment in ERRPs new plant technology would be optimized by well-trained operators and accurate controls, said Hsiu-Chen Wang, senior engineer, Consolidated Edison of New York East River Repowering Project. One major benefit was safe and efficient plant startup that reduced the plants commissioning time from four months to one month.
After a successful plant startup, Scenario simulation is now used to optimize East Rivers processes for improved efficiency and reliability. Further plant tuning, as well as the addition of any new equipment, can be tested and confirmed using the simulation technology before integration into the live system. Additionally, Con Edison is considering using Scenario as a means to realize additional revenue through its Learning Center outsource training for new cogeneration facilities throughout the New York metropolitan area.
Emerson has decades of real-world power industry experience designing, engineering and supporting simulation projects. Leading power producers around the world rely on Emersons Scenario engineered simulation solutions to enhance the safety, reliability and overall operations of their plants. Utilizing tie-back logic, algorithmic models and comprehensive first-principle models, Scenario can provide a full range of training and engineering simulation solutions tailored to meet the unique operational challenges of each facility.
Emerson has a long history of designing, engineering, implementing and supporting simulation technologies, said Bob Yeager, president of the Power & Water Solutions division of Emerson. In todays ROI-driven business climate, were finding that now, more than ever, power producers understand the value of simulation and are eager to take advantage of using this flexible tool for engineering analyses, validating new control logic and enhancing operator performance, all of which contribute to increased plant reliability and safety.
About Emerson Process Management
Emerson Process Management, an Emerson business, is a leader in helping businesses automate their production, processing and distribution in the power, water and wastewater treatment, metals and mining, chemical, oil and gas, refining, pulp and paper, food and beverage, pharmaceutical, and other industries.
Emerson's Power & Water Solutions division (www.emersonprocess-powerwater.com) is a global supplier of advanced distributed process control and information systems. The Pittsburgh-based company is a recognized leader in developing plant-wide process control solutions for the power generation, water treatment and wastewater treatment industries. Power & Water Solutions plays a key role in the Emerson mission of combining superior products and technology with industry-specific engineering, consulting, project management and maintenance services. Emerson brands include: PlantWeb; Ovation; SmartProcess; Fisher; Micro Motion; Rosemount; Mobrey; Daniel, Bristol, DeltaV; and AMS Suite.
Emerson (NYSE: EMR), based in St. Louis, is a global leader in bringing technology and engineering together to provide innovative solutions to customers through its network power, process management, industrial automation, climate technologies, and appliance and tools businesses. Sales in fiscal 2007 were $22.6 billion.
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