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Technical & economical evaluation of solar powered LED street lights: An overlook contributor to load-shedding

Katyara S., Staszewski Ł., Ansari J., Soomro A., Akhtar F.

Przegląd Elektrotechniczny

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2018

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R. 94, nr 1

157--162

EN

The traditional Street Lighting System (SLS) in Pakistan is based on mercury and sodium-vapor lamps. The individual lamp in SLS consumes 60 W to 600 W from the utility system. This increased power consumption ultimately affects the commercial and residential consumers thereby causing load-shedding during the peak hours. To reduce the power consumption and to shed some load from utility network, solar powered Light Emitting Diode (LED) Street lighting system has been suggested by the ministry of planning and development of Pakistan across the country. The LEDs with an equal luminance of 72 lm/w comparing to 250 W sodium-vapor or mercury lamp consume 100 W. Since the capital cost of installing solar powered LED lighting system is higher than traditional lighting system. But on the long term planning scale, the results are very much promising, resulting in 60% saving of energy. To evaluate the technical and economical feasibility of solar powered street lighting project, this research investigates the performance and installation cost of LEDs based SLS in the urban region of Sindh, Pakistan, with two lanes having pole distance of 30 m. This study shows that the total cost of installing the solar powered LED SLS is 21.25 million PKR and 13.98 million PKR for utility powered LED SLS as compared to 5.48 million PKR for traditional SLS, except electricity charges. On average, the deployed traditional SLS consumes 547,500 kWh/yr. The payback time for suggested solar powered LED lighting system is 5.384 years. The reliability and efficacy of results were assured through HOMER software.

PL

Tradycyjny system oświetlenia ulicznego (SLS) w Pakistanie oparty jest na lampach rtęciowych i sodowych. Poszczególna lampa w systemie SLS zużywa od 60 W do 600 W od systemu uzdatniania. To wzmożone zużycie energii wpływa ostatecznie na konsumentów komercyjnych i mieszkalnych, powodując w ten sposób spadek obciążenia w godzinach szczytu. Aby zmniejszyć zużycie energii i rozładować niektóre obciążenia z sieci energetycznej, zaproponowano ministerstwo planowania i rozwoju Pakistanu w całym kraju, system oświetlenia ulicznego LED emitowanego przez energię słoneczną. Diody LED o tej samej luminancji 72 lm / w w porównaniu do lampy sodowej lub rtęciowej 250 W zużywa 100 W. Ponieważ koszt kapitału zainstalowania systemu oświetlenia LED jest wyższy niż w przypadku tradycyjnego oświetlenia. Jeśli chodzi o długoterminową skalę planowania, wyniki są bardzo obiecujące, co daje 60% oszczędność energii. Aby ocenić techniczną i ekonomiczną wykonalność projektu oświetlenia ulicznego zasilanego energią słoneczną, przeprowadzono badania dotyczące wydajności i kosztów instalacyjnych lamp SLS w rejonie miejskim Sindh, w Pakistanie, z dwoma pasami o odległości bieguna 30 m. Badanie wykazało, że całkowity koszt zainstalowania zasilanego energią słoneczną LED SLS wynosi 21,25 mln PKR i 13,98 mln PKR dla zasilanych energią elektryczną LED SLS w porównaniu do 5,48 mln PKR dla tradycyjnych SLS, z wyjątkiem opłat elektrycznych. Średnio, wdrożony tradycyjny system SLS zużywa 547 500 kWh rocznie. Czas zwrotu energii dla sugerowanego systemu oświetlenia LED wynosi 5,384 lata. Niezawodność i skuteczność wyników została zapewniona dzięki oprogramowaniu HOMER.

2

Technical and Economical Evaluation of Proton Exchange Merobrane (PEM) Fuel Cell for Commercial Applications

Katyara S., Iżykowski J, Staszewski Ł, Shaikh F.

Present Problems of Power System Control

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2017

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Nr 8

41--49

EN

The green energy sources are the utmost needs of today’s world where the reserves of fossil fuel are depleting day by day. The Distributed Generation (DG) has become integral part of power system at commercial level. The most efficient among all DGs and Renewable Energy Sources (RES) is the Fuel Cell (FC) power generation. The fuel cell invariably converts chemical energy directly into electricity. The Fuel cells have normally 60 to 70% efficiency at working conditions. The polarization curve of fuel cell plays important role in improving its efficiency. This research presents the mathematical and Simulink modeling 6 kW, 45 Vdc of Proton Exchange Membrane (PEM) fuel cell. The input thermodynamic parameters of fuel cell are varied and their effects on the output electrical variable are observed. The DC/DC boost converter is used to step up the voltage of fuel cell to 100 Vdc at commercial usable level. A new mathematical equation is presented to improve the efficiency of fuel. The mathematical results are then varied through Simulink results.

3

Power Loss Reduction With Optimal Size And Location Of Capacitor Banks Installed At 132 kv Grid Station Qasimabad Hyderabad

Katyara S., Shah M. A., Iżykowski J.

Present Problems of Power System Control

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2016

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Nr 7

53--64

EN

With Growing Concerns About Voltage Profile And Power Factor At Distribution Networks, The Capacitor Banks Are Invariably Installed For Reactive Power Compensation. The Reactive Power Supplied By Capacitor Banks Is Proportional To Square Of Their Rated Loading Voltage. Capacitor Banks Eventually Increase The Loading Capacity Of Feeders, So As To Supply More Customers Through Same Line Section. Capacitor Banks Can Be Installed Anywhere On The Network. The Idea Of This Paper Is To Reduce Total Power Loss And Ensure Greater Availability Of Capacitor Bank Installed At 132 Kv Grid Station Qasimabad Hyderabad, For Reactive Power Compensation, Even Under Worst Conditions On Distribution System. This Is Achieved By Enhancing Its Location And Size. At Present Capacitor Bank Of Full Size, I.E. Of 1.21 Mvar Is Installed At 11 Kv Bus Of 132 Kv Grid Station Qasimabad Hyderabad. Moreover This Paper Suggests Small Sized Capacitor Banks That Would Be Installed At Different Feeders Instead Of One Large Size Capacitor Bank At 11 Kv Bus. The Voltage Profile And Power Losses With Present Sized Capacitor Bank And The Proposed Small Sized Capacitor Banks Are Compared In This Work. The Distribution Network Has Been Simulated By Using MATLAB .