ECE-P 412 Winter 2004 Power System Analysis II January 7, 2005
Lab Project 1: Power Flow Study
Anupam Gopal and Dagmar Niebur
Electrical and Computer Engineering Dept.
Drexel University
Problem Description:
The following case study was proposed and published as part of design problem 4.1, 5.1 and 10.1 in A. R. Bergen
and V. J. Vittal Power Systems Analysis, Prentice Hall, 2000.
This power flow study will be conducted on the test system presented below using two different simulation software
packages, PowerWorld Simulator Version 8.0 and Mathpower. We will use the version of PowerWorld published in
J. D. Glover and M. S. Sarma, Power Systems Analysis and Design, 3rd, Brooks/Cole, Pacific Grove, CA 2001. This
textbook is used for the junior class ECE P 354 on Energy Management Systems.
MATPOWER is a public domain Matlab based software which can be downloaded from
www.pserc.cornell.edu/matpower/ or http://blackbird.pserc.cornell.edu/matpower/2.0/download.html.
System Specification:
The base system introduced consists of an existing transmission system that contains 161 kV and 69 kV
transmission lines which run through both urban and rural service territory. The existing load at the various buses in
the system is specified. The parameters of the existing transmission lines in the system are also provided. The load
centers and the power sources of the Eagle Power System are shown in Fig.1.1. The figure is scaled based on the
distances given in Table 1.1.Note the urban area of the system. Table 1.1 specifies the transmission line and
transformer data. Table 1.2 provides the load data.
System Bus Names and Loads:
Buses 1-3 are power sources at 161 kV
Buses 4-8 are urban load buses
Buses 9-15 are rural load buses
Buses with loads under 30MVA should be served at 69 kV and buses with loads over 50 MVA should be served at
161 kv. Other buses can be served at either voltage,
A base case system is provided. The details of the base case system are as follows:
There are 69kV-161kV 60MVA transformers at the Siskin and Crow buses. Each of the buses is split into two parts.
At Siskin, the high voltage side is labeled bus 9, while the low voltage side is labeled bus 17. At Crow, the high
voltage side is labeled bus 15, while the low voltage side is labeled bus 16.
A. Generation:
1. Make OWL (bus 1) the swing bus.
2. For the generation at SWIFT (bus 2) and at PARROT (bus 3),set the reactive power limits Qmin = -100.0 MVAr,
and Qmax = 250.0 MVAr for both generators. Set both active power limits Pmax = 430 MW.
3. For the generation at SWIFT (bus 2) and at PARROT (bus 3),set both active generation as Pgen = 190 MW.
Since the voltage magnitudes is usually highest at generators and since 1.04 is at the upper limit of acceptable
voltage magnitudes, schedule the voltage magnitudes on the three generators at or near 1.04 p.u.
