Applications of DG and Shunt Capacitor in Hill Top Network Enugu, Nigeria for Stability Improvement and Loss Minimization
Abstract
The incorporation of Distributed Generation (DG) and shunt capacitor in a distribution system simultaneously for voltage profile improvement and minimization power losses were addressed in this paper. For this purpose, the Voltage Stability Index (VSI) Method and Power Loss Index (PLI) approach were utilized to determine the suitable position of DGs and shunt capacitors. In addition to that, technical and economic analyses were examined for various combinations of DGs and shunt capacitors. The proposed methodology was successfully demonstrated on 38-bus Hilltop 11kV radial networks with four different load scenarios on MATLAB/PSAT environment. The effect of the installation of the distributed Generation (DG) and shunt capacitor in a distribution system was studied and analyzed and the result was compared with the network, without the installation of neither distributed generators nor shunt capacitor banks. To achieve this aim, a load flow method using Newton-Raphson technique was used to estimate unknown variables in the network such as voltage, angle, MVAR and MW, before the installation of the DGs and shunt capacitor banks. It was observed that the majority of the buses were below the standard operating voltage range, (0.95pu –1.05pu).From the outcomes, it was noted that the real and reactive energy loss reduction calculated in case-4 (simultaneous installation of both DG units and capacitor banks) was 37.10% and 49.95% respectively which is better as compared to the other two cases which recorded 27.75% real power reduction and 33.28% reactive power reduction for case 2 (installation of only DG units) and 25.91% real power reduction and 32.28% reactive power reduction for case 3 (installation of only capacitor banks). The proposed methodology also demonstrated the capability for solving the problem of voltage deviation and improvement in voltage profile. Case-4 (simultaneous installation of both DG units and capacitor banks) showed better results than the other two cases. From the outcomes, it is noted that the voltage profile improvement calculated in case-4 was 6.09% which is better as compared to the other two cases which recorded 5.12% improvement for case 2 (installation of only DG units) and 5.70% improvement for case 3 (installation of only capacitor banks). Hence, in the four scenarios, case-4 (simultaneous installation of both DG units and capacitor banks) showed better results than the other three cases.
Keywords
Distributed Generator, Power Loss, Voltage Profile, Shunt Capacitor
Citations
IRE Journals:
Kingsley U. Okeke , Emmanuel A. Anazia , Jude I. Aneke , Chidiebere A. Okeke , Augustine O. Aniagboso
"Applications of DG and Shunt Capacitor in Hill Top Network Enugu, Nigeria for Stability Improvement and Loss Minimization" Iconic Research And Engineering Journals Volume 7 Issue 8 2024 Page 366-374
IEEE:
Kingsley U. Okeke , Emmanuel A. Anazia , Jude I. Aneke , Chidiebere A. Okeke , Augustine O. Aniagboso
"Applications of DG and Shunt Capacitor in Hill Top Network Enugu, Nigeria for Stability Improvement and Loss Minimization" Iconic Research And Engineering Journals, 7(8)
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