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Project: May 05-10
Project Team Members:
Edward McDowell, [email protected]
Richard Mott, EE / [email protected]
Faculty Advisors:
Dr. John [email protected]
Dr. James [email protected]
Combined-cycle generating units are being added to current power systems in order to meet increasing load requirements as efficiently as possible. They consist of two simple-cycle combustion turbines with a heat recovery steam generator. Combined-cycle units exhibit non-monotonically increasing cost curves which cannot be handled by classical methods of economic dispatch optimization such as Newton-Raphson, binary-search, and other lambda-iteration techniques. The project team will develop an algorithm to calculate optimal economic dispatch including both monotonically and non-monotonically increasing generators. Major milestones include development of the optimization algorithm, implementation of the algorithm in Microsoft Excel using Visual Basic macro programming, and delivery of the software and documentation to the client. Optimal results will allow for power to be produced at the lowest possible cost to the client while prolonging the life of each generating unit.
Problem statement:• Develop an algorithm for the optimal economic dispatch of monotonically and non-
monotonically increasing generators• Create a program to implement the algorithm
Operating environment:• Use Visual Basic for macro creation in Microsoft Excel• Real-time economic dispatch at control center
Intended User:• MidAmerican employees• Generation dispatchers
Intended Uses:• Optimize the economic dispatch of monotonically increasing and non-monotonically
increasing generators• Benchmark cost curves for future algorithm designs
Assumptions:• Enumeration / iteration will be used as the optimization method for the algorithm• 12 monotonically increasing units and 2 sets of non-monotonically increasing units will
be modeled
Limitations:• Input data for generating units shall use piece-wise linear incremental heat rate curves• Results must be written into a single Excel workbook
Expected End Product:• Excel workbook file with Visual Basic macros • User instructions documentation• Easy to use interface
Design Objectives:• Flexible program design• Well-commented program code• Comprehensive iteration scheme
Functional Requirements:• Provide best generator dispatch• Output iteration calculations
Design Constraints:• Five minute limit on iteration run time• Expandable for future non-monotonically increasing units• Clear box design enabling modifications of program• Ability to include unit commitment
The project will create a software application that will seek to produce the most economic power distribution between monotonically and non-monotonically increasing generators. An algorithm will be created to incorporate the two types of generators and will be combined with a user interface to produce a usable program. This program will be written in Microsoft Excel using Visual Basic macros and will meet the outlined requirements. MidAmerican Energy can expect to benefit from this project through a reduction in fuel costs due to improved generator dispatch and prolonged generator life.
Client Contacts:
Alan [email protected]
Matt [email protected]
Financial Requirements:
Adam Peterson, [email protected]
Seth Thorp, [email protected]
Item W/O Labor With Labor
Bound Project Plan $ 20.00 $ 20.00
Poster $ 62.00 $ 62.00
Labor at $10 per hour:
McDowell, Edward $1,550.00
Mott, Richard $1,540.00
Peterson, Adam $1,510.00
Thorp, Seth $1,560.00
Total $ 82.00 $ 6,242.00
Abstract
Personal Effort:
Resources
Contact Information
Introduction
Project Requirements
Summary
Total Hours:
Edward McDowell 155
Richard Mott 154
Adam Peterson 151
Seth Thorp 156
Total 616
Greater Des Moines Energy Center
Combined Cycle Plant
Diagram of a Combined Cycle Generator
Hours per Task40 16
173
95604032
160
Project DefinitionTechnology Consideration and SelectionEnd-Product DesignEnd-Product Prototype ImplementationEnd-Product TestingEnd-Product DocumentationEnd-Product DemonstrationProject Reporting
Technical Approach and Considerations
Load User Defined Inputs
Solve for Non-Monotonically
Increasing Units
Solve for Monotonically
Increasing Units
Combine Solution Sets
Run AlgorithmOutput Optimal
Dispatch
Proposed Approach:
Technologies Considered: • Visual Basic (required) • Microsoft Excel (required)
Testing Considerations:• Test the algorithm using C++• Client testing
Project Requirements cont.
Measurable Milestones:• End-product Design Dec. 13, 2004• Product prototype Feb. 21, 2005• Product testing Apr. 04, 2005• Product documentation Apr. 11, 2005• Product demonstration Apr. 18, 2005
