Kajian aliran kuasa merupakan tulang belakang bagi analisis dan rekabentuk
sistem kuasa. Kajian aliran kuasa diperlukan dalam perancangan, operasi, penjadualan
ekonomi, penukaran kuasa antara utiliti dan analisis seperti kestabilan fana dan pelan
kontingensi. Namun begitu, pengiraan yang melibatkan aliran kuasa adalah sangat rumit
dan mengambil masa yang panjang apabila sistem yang terlibat adalah besar dan
melibatkan persamaan tak linear. Dengan menggunakan perisian yang dilengkapi
dengan kaedah berangka, masa yang diperlukan untuk menyelesaikan masalah ini telah
dikurangkan. PSCAD dan MATLAB merupakan perisian yang digunakan untuk kajian
aliran beban dalam projek ini. Teori kajian aliran kuasa telah dipelajari sebelum
rekabentuk sistem kuasa dibuat dan simulasi dijalankan oleh perisian. Aliran kuasa yang
didapati daripada kedua-dua perisian dibandingkan dan peratus perbezaan dikira. Masa
simulasi untuk perisian telah dicatatkan. Dengan itu, prestasi perisian akan ditentukan.
Keputusan analisis menunjukkan bahawa peratus perbezaan bagi aliran kuasa adalah
bernilai sebanyak 0% sehingga 0.4216%. Bagi masa simulasi pula, PSCAD dan
MATLAB masing-masing mencatatkan masa dari 5.3s sehinnga 43.7s dan 0.069840s
sehingga 0.163626s. Peningkatan masa simulasi adalah berkadar langsung dengan
penambahan saiz sistem kuasa. Hasil daripada perbandingan keputusan menunjukkan
bahawa kedua-dua perisian mampu menyelesaikan masalah aliran kuasa dengan baik.
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Power flow studies are the backbone of the power system analysis and design.
Power system analysis is used for the planning, operation, economic scheduling,
exchange of the power between utilities and analyses such as transient stability and
contingency plan. However, the power flow computation can be very complicated and
time consuming when the system involved is large and related with nonlinear equations.
With the use of the software integrated with numerical method, time required to solve
the power flow problem is considerably reduced. The PSCAD and MATLAB are the
software used for load flow analysis in this project. The theory of the power flow
analysis is studied before the power flow systems are designed and simulated by the
software. After that, the line flow powers obtained from the software are compared and
percentage differences between the data from different software are calculated.
Simulations time of the software for all the power flow systems are recorded. From that,
the performance of the software will be compared. The analysis of the results showed
that percentage differences of the line power flow range from 0% to 0.4216%. The
simulation time is from 5.3s to 43.7s and 0.069840s to 0.163626s for PSCAD and
MATLAB respectively. The simulation time increase with the increase of the size of the
power flow system. The comparison result revealed that both the software performed
well in solving the power flow problem.
Analysis and comparison for three-phase load flow using software / Ting Kee Siong