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Calculate line flows, power loss and voltages End Calcuate J k s and k s V Compute J e Deter δ ∆ ∆ −1 min k s V k s V k s V voltages bus new Calculate ∆ + = +1 Yes No k=k+1

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( s=

s V voltages bus initial Assign

k = 0

calc s Q calc s P power bus Calculate , , >∈ ∆ ∆Pk and Qk

Max _s _s Print Result

End k s k s k s V k s V k s V voltages bus new Calculate and J Invert δ δ +∆ < ∆ + = +1 k s Q k

Q_s ≥ _max No Qk_s ≥Q_sk_min

k s Q k Q

Set _s = _,_max

Yes k s Q k Q

Set _s = _,_min

Yes J to k s V k s Q Add J Calculate ∆ ∆ / Yes

No Max∆P_sk and∆Q_sk >∈

No

Calculate J Yes k = k + 1

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Start

Collect impedances into Zrect Zrect = linedatamatrix(3) + linedatamatrix(4) j

Zrect

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Forming of YBus

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k = 1

Is linedatamatrix(k , 3) = n Ybus(n , n) = Ybus(n , n) + Yrect(k)

Is linedatamatrix(k , 4) = n Ybus(n , n) = Ybus(n , n) + Yrect(k)

End of internal

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Start

Set Variables: maxerror, iter, accuracy, maxiter

Is maxerror >= accuracy & iter <= maxiter

Iter = 1

n = 1 to number of bus bars

L = 1 to number of transmission lines

Is linedatamatrix(L,2) = n

k = linedatamatrix(L,2) YV = YV + Ybus(n, k) * Vreal(k)

Is linedatamatrix(L,2) = n

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Sc = Conj[Conj(Vreal(n)) * (Ybus(n ,n) * Vreal(n) + YV)]

Is busdatamatrix(n,2) = 1

Store real, reactive powers and voltage

Is busdatamatrix(n,2) = 2

Test the MVAr of generator buses Is iter >= 10

Find values for Vc(n) and V(n) Yes

No

Yes Yes

No

Yes

No

Yes

Find values for Vc(n) and V(n) No

Iter = iter + 1

Maxerror = max(max(abs(real(DP))),max(abs(imag(DQ)))) End

No

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University of Southern Queensland

FACULTY OF ENGINEERING AND SURVEYING

ENG 4111/4112 Research Project PROJECT SPECIFICATION

FOR: ONG Gimhua

TOPIC: SOFTWARE DEVELOPMENT FOR POWER SYSTEM

ANALYSIS

SUPERVISIORS: Ron Sharma

ENROLMENT: ENG 4111 – S1, EXT, 2005;

ENG 4112 – S2, EXT, 2005

PROJECT AIM: This project aim to develop a software to determine the response of a power supply system in Singapore when the system is subjected to disturbances. The study of dynamic response to sudden changes and disturbances in electrical power systems is carried out. Common disturbances include fault, power flow, switching, load changes, motor starting, loss of generation, loss of excitation, and blocked governor, etc

PROGRAMME: Issue A, 21st Mar 2005

8. Create Tool box for drawing.

9. Schematic check program to check all the interconnections of a busbar with other components is performed to form the NxN system.

10.Design a simulation program to simulate power flow.

11.Draw Animation to show load flow direction.

12.Create a database to store component data and system.

13.Perform DC/AC load analysis.

14.The software intended to use for the above includes Microsoft Visual Basic 6 programming language, Microsoft Access 2000 and Matlab simulation.

As time permits:

15.To be built on to web-based so that the users will be able to access it through internet.

AGREED:

____________ ________________ Student Supervisor

ONG Gimhua Ron Sharma

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