RALEIGH, N.C., June 24 /PRNewswire-FirstCall/ -- Siemens Power
Transmission & Distribution, a unit of Siemens AG (NYSE: SI) and Siemens
Corporation, announced today that its Energy Management and Information
Systems (EMIS) division produced a major breakthrough for the optimization of
generation resources for large regional wholesale energy markets utilizing
Mixed Integer Programming (MIP) based Security Constrained Unit Commitment
(SCUC).
Security Constrained Unit Commitment is a software solution used to
optimize wholesale energy markets. It first assesses the energy load
requirements of a control area and then determines the optimum use of
available generating resources needed to supply that load, taking into
consideration planned and existing transmission security constraints.
Siemens PowerCC(TM) SCUC is part of the Siemens PowerCC Energy Market
Suite of applications and is designed to optimize generation resources in
large day-ahead energy markets while operating a stable and secure power
system operation. This new approach resolves many of the major deficiencies
inherent in the traditional Lagrange Relaxation-based SCUC solutions currently
in use by providing improved quality and robustness of the solution and
formulating highly accurate modeling of transmission constraints. In
addition, the new Siemens PowerCC SCUC is designed to maximize parallelization
of the solution process providing for high scalability on symmetrical multi-
processor (SMP) hardware platforms.
According to Jan van Dokkum, President of Siemens Power Transmission and
Distribution Inc., "This breakthrough will have a tremendous impact on the
development of wholesale energy markets. PowerCC SCUC is specifically
designed and built to provide the efficiency, speed and accuracy required for
the large energy markets envisioned by the Federal Energy Regulatory
Commission's (FERC) Standard Market Design for large-scale regional
transmission organizations."
PowerCC SCUC utilizes advanced Mixed Integer Programming (MIP) techniques
combined with a Separable Sequential Quadratic Interior Point Method to obtain
a high quality, optimal SCUC solution. The use of the MIP-based optimization
technique provides extensive modeling capabilities, which are very difficult
to achieve with traditional SCUC approaches. For example, this new SCUC
approach produces accurate, optimal modeling of transmission constraints in an
integrated unit commitment and economic dispatch procedure.
In all test cases with large SCUC problems, this new engine reached an
optimal solution two to six percent lower in overall system bid-in cost
compared to solutions obtained with the traditional Lagrange Relaxation-based
approach commonly used today. At the same time, the execution times were well
within the requirements of the energy market timelines currently in use and
planned for large-scale Regional Transmission Organizations (RTOs).
"We are looking forward to an establishment of a large public benchmark
SCUC model, which will help in addressing the issues of feasibility,
scalability, robustness and quality of SCUC solutions for the day-ahead energy
market clearing," said Petar Ristanovic, executive consultant for the Siemens
EMIS Division responsible for PowerCC SCUC development.
In addition to the functionality required by traditional wholesale energy
markets, the new PowerCC SCUC functionality supports more complex market
designs that will be required by larger wholesale energy markets envisioned by
FERC, including: full co-optimization of energy and ancillary services,
cascading prices of ancillary services, modeling of energy limited resources,
accurate modeling of piece-wise linear price curves, optimization of energy
lost opportunity costs, price sensitive interruptible loads, and integrated
preventive/corrective contingency constrained modeling.
About Siemens Power Transmission & Distribution (USA)
Siemens Power Transmission & Distribution, Inc., headquartered in Raleigh,
NC, creates innovative equipment and energy service solutions for electric
utilities, independent power producers, co-generators and other energy-
intensive industries. It has operations in Wendell, NC; Jackson, MS;
Lafayette, IN; Minneapolis, MN; San Jose, CA; Atlanta, GA and Reynosa, Mexico.
For more information visit http://www.ptd.siemens.com.
SOURCE Siemens Power Transmission & Distribution, Inc.
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CONTACT:
Rita Simonetta, Senior Communications Manager
of Siemens Power Transmission & Distribution, Inc.,
+1-919-325-7044, or fax, +1-919-325-7057
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