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This Complex Engineering Activity Report outlines the design and analysis of a power system, from generation to distribution. The report discusses the importance of power quality monitoring and the challenges of delivering reliable clean power. The team designed a power system with a swing bus, multiple generators, transmission lines, and distribution grids. They encountered issues when one transmission line went out of service and solved them by interconnecting the system and using capacitor banks to improve power factor and voltage levels.
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Department of Electrical Engineering Sir Syed University of Engineering & Technology Karachi Pakistan Batch 2018
336.4, 26 strands and a length of 900 m from the distribution then both the lines are connected to the buses to the Step Down transformer T5 and T6 which steps down the 11KV into human consumption Load (440 V) then it is connected to the buses to the Cable 1 and 2 with single core 25milimeter square XLPE rated 0.6KV which are connected to final buses to the load (Lump Load 1 and 2) which were half the rating of the distribution transformer. Component Voltage rating Power rating Other settings Transformer 1 and 2 Trasnformer 3 and 4 Trasnformer 5 and 6 11 ∆ / 132 ∆ KV 132 ∆ / 11 ∆ KV 11 ∆ / 0.44 Ύ KV 100 MVA 100 MVA 50 MVA Typical data Typical data Typical data Generator 1 and 2 11 KV 50 MVA Typical data Bus Bus 2 Bus 3 Bus 4 Bus 5 Bus 6 Bus 7 Bus 8 Bus 9 Bus 10 Bus 11 Bus 12 Bus 11 KV 132 KV 132 KV 132 KV 132 KV 11 KV 11 KV 11 KV 11 KV 0.44 KV 0.44 KV 0.44 KV 0.44 KV
Auto Auto Auto Auto Auto Auto Auto Auto Auto Auto Auto Auto Auto Load 1 Load 2 0.44 KV 0.44 KV 25 MVA 25 MVA Auto Auto
Design a power system comprising of a minimum of 8 buses such that it has a swing bus with at least 2 generators in parallel. The voltage of the generators is in the range of 11-18kV with a rating ranging from 10-50 MVA. At least 2 transmission circuits are radiating out of the swing bus. Each transmission circuit is connected to at least 1 distribution grid which steps down the voltage to domestic voltage level. Connect the primary feeders to different loads and do the appropriate load sizing (the total load connected should be at least half the rating of the transformer). Distribution grid of the city is at least 40 km away from the generation station. Determine the optimum
solutions to fix the issues which arise in the system when one of the transmission lines gets out of service, but the supply isn’t interrupted to the loads served by that transmission circuit. o Circuit Diagram After Implementing the Case: o Fixing the supply through the switch between two lines
After applying the case our supply got interrupted and we solve that issue by interconnecting the system with each other through switch after that we got an alert of under voltages and marginal errors on buses due to that we got a low power factor system with lower efficiency ,,,as we know power factor that can be improved by several methods but we use the method of capacitor bank to remove the alert issues and to improve the power factor of our system and as we increased the mvar of our system voltage also increases and the power becomes more efficient and system becomes stable Calculation for value of capacitor: p.f=0.7458 ` * p.f= KW / KVA=cos 𝜃 Req p.f = 0. P= KVAR= P(* 𝐭𝐚𝐧 𝜽𝟏 − 𝐭𝐚𝐧 𝜽𝟐 ) 19421(tan(cos−1(0.7458)) – tan(cos−1(0.98)) KVAR = 17224. MVAR =17. For another capacitor Pf=0. Req p.f=0. P= KVAR=13968((tan(cos−1(0.8107)) – tan*(cos−1(0.98)) KVAR=12087. MVAR=12. For the improvement of power factor and to solve the under voltage condition we use the capacitor bank connect 17 MVAR capacitor at bus 12 and 12 MVAR on bus 13….
The power distribution system is the main point of observation in order to minimize the power losses and errors. The under voltages and excitation produces too much disturbances and provides poor quality of electricity. There can be many way making power supply reliable and efficient. In this balanced system, the main focus is on the distribution schemes where we can make supply more reliable by transforming schemes