辅导案例-ELEC3111 -Assignment 02


School of Electrical Engineering and Telecommunications
Term 3, 2019
Assignment 02
ELEC3111
Distributed Energy Generation
Lecturer: Dr. Ke Meng, Email: ke.meng@unsw.edu.au
Tutor: Dr. Bin Liu, Email: eeliubin@hotmail.com
Page 1

This assignment one is due by 11:55pm on Friday 15th November (week 09). The assignment must be submit-
ted via Moodle as a pdf file.

The assignment must be submitted individually and must be your own work. The UNSW policy on student pla-
giarism can be found on the www.unsw.edu.au website. Note that UNSW uses automated plagiarism software.

Note that late submission without good reason will see you lose significant marks. You are advised to contact me
prior to the submission date if you expect to be late in order to discuss possible extensions - you will need a good
reason.

Question: The single-line diagram of a 9-bus system is given below, followed by the network parame-
ters and demand data.
1
23 5
4
8
7
6
9PV
Demand
Demand
Demand
Demand
Demand
Demand
Demand
Demand


Table 1: Line parameters in the network
Line Index From bus To bus Line impedance-R (p.u.) Line impedance-X (p.u.)
1 1 2 0.0058 0.0029
2 2 3 0.0308 0.0157
3 2 4 0.0228 0.0116
4 2 5 0.0238 0.0121
5 4 6 0.0511 0.0441
6 5 7 0.0117 0.0386
7 7 8 0.1068 0.0771
8 7 9 0.0643 0.0462

Page 2
Table 2: Bus demands in the network
Bus Index Active Load (MV) Reactive Load (MVar)
1 0.00 0.00
2 2.25 1.34
3 2.02 0.89
4 2.70 1.78
5 1.35 0.67
6 1.35 0.45
7 2.00 0.22
8 1.00 0.22
9 1.35 0.45

The voltage at bus 1 (root bus) is always kept at 1.05 p.u.. Now if a PV farm is going to be installed at
bus 7 and the network service provider does not want any over-voltage issue occurs after the installa-
tion. In other words, the voltage magnitude of any bus should not exceed 1.1 p.u. under the given load
condition. Choose the base value for power as 10 MVA and try to calculate the allowable installed ca-
pacity for this PV farm. (The power factor of the PV farm is assumed to be kept at 1.0)
What you need to provide in the assignment:
(1) Logic diagram or steps to illustrate the ideas to calculate the allowable PV farm capacity.
(2) Develop codes with your own programming tool and provide the codes and calculated results in
the submitted document.

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