Automatic Generation Control for Contract Based Regulation

1
Automatic Generation Control for Contract Based
Regulation
Abstract
Our project deals with designing an AGC module
that can be used as a teaching tool. This
includes using current AGC schemes that must
analyze the performance of a control area under
different operating conditions. This project
necessitates that text and diagrams be integrated
into a single module. MATLAB will also be used
to identify the process ability to regulate
within NERC guidelines.
Background
Below is a block diagram of a typical AGC
controller. The system measures the output of
the all electrical generators. It also measures
the frequency at a satellite location in the
system. Finally, it measures the tie flows
between interconnected systems. Taking all those
measurements, the AGC calculates the amount of
power increase needed at each generator to supply
the customer load. The power is increased by
opening steam valves at the generator and
resetting the governor of the turbine. The
process runs continuously in real time.
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Proposed Approach
Functional requirements Automatic generation
control is the center control for power output of
the generators, and shall have three major
requirements Frequency To maintain system
frequency at or nearest to 60 Hz Power Flow
To monitor and maintain a balance of input and
output power between control
areas Economic Dispatch To keep each units
generation at the least cost. The economic
dispatch calculations must carry out once
every few minutes Technical Approach This
project will require heavy research into
automatic generation control. Included in this
will be research from the internet, library,
and academic writing. The main goal here is to
keep the frequency at a nominal value with
constraints considerations. The system is
receiving input signals from measurements
and sending signals to the generators.
Steady state differential equation(s)
will be derived that describe the
relationship between input and output. This
equation then can be testing by using
SimuLink and MATLAB. Testing
Requirements The system testing approach
shall be based off of the data provided to us
the author of Power Generation, Operation,
Control. The tests shall include the
discovery of system problems. The testing
shall involve system response to a change in
frequency. How fast the system can bring
the frequency back to nominal with the most
economic conditions will be analyzed.
Testing of the MATLAB code will be done by
the team members.
Power Generation, Operation, Control
Allen J. Wood
Introduction

• Problem Statement
• The general problem of this project is to
  produce a PowerLearn Module for training or
  educational purposes. A useable model for AGC
  will be produced. It will be integrate text,
  diagrams, and MATLAB instructions into a complete
  learning experience for the reader.
• Intended Users
• Electrical engineering student
• Electrical engineering professors
• Intended Use
• Electrical engineering student
• Electrical engineering professors
• Assumptions
• We will assume a model of a combined cycle
  generation plant
• A system with a maximum of 3 generators
• A system comprised of 2 interconnected areas
• Deliverables
• MATLAB Controller
• PowerLearn Module

Resource Requirement
Personal Effort
Financial Resources
Team Members
Client
Mark Tiemeier Cam Bui Team Leader Team
Member Electrical Engineer Electrical
Engineer mtiemeie_at_iastate.edu camqb_at_iastate.edu
Chanh Bui Peter Rufino Team Member Team
Member Electrical Engineer Electrical
Engineer bjosh_at_iastate.edu prufino_at_iastate.edu
Department of Electrical and Computer
Engineering Iowa State University
Advisor
Gerald Sheble Professor of Electrical
Engineering gsheble_at_iastate.edu