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EE8501 Important 8 Marks Questions Power System Analysis Regulation 2017 Anna University

EE8501 Important 8 Marks Questions POWER SYSTEM ANALYSIS

EE8501 Important 8 Marks Questions Power System Analysis Regulation 2017 Anna University free download. Power System Analysis Important 8 Marks Questions EE8501 pdf free download.

Sample EE8501 Important 8 Marks Questions Power System Analysis:

(i) The sub transient reactance of a 500MVA, 18kV generator
is 0.25p.u on its rating. It is connected to a network
through a 20/400kV transformer. Find out the sub transient
reactance of the generator on a base of 100MVA and 20kV
(ii) A transformer interconnects a strong 400kV and weaker
200kV system and is provided with a tap changer on the
400 kV side. What is the effect of setting the tap such that
the voltage ratio is 410/200kV on the 400 and 200kV sides
(iii) Draw the pu reactance diagram of a three winding
transformer whose three phase rating are: primary wyegrounded
15MVA,66kV Secondary (S) wyegrounded,
10MVA 13.2 kV tertiary (t) delta connected 5
MVA 2.3 kV. Mark the appropriate value of the impedance
are ZPS=7% ON 15MV;ZPT=9% on 15 MVA and 66KV
ST=8% ON 10MVA and 13.2kV EE8501 Important 8 Marks Questions Power System Analysis

(i)In this line diagram shown in figure each three phase generator G
is rated at 200MVA,13.8kV and has reactance of 0.85p.u and are
generating 1.15pu. Transformer T1 is rated 500MVA,13.5kV/220kV
and has reactance of 0.8%.The transmission line has a reactance of EE8501 Important 8 Marks Questions Power System Analysis
7.8Ω.Transformer T2 has rating of 400MVA,220kV/33kV and a
reactance of 11%.The load is 250MVA at a power factor of
0.85lag.Convert all quantities to a common base of 500MVA and
220kV on the line and draw the circuit diagram with values
expressed in pu EE8501 Important 8 Marks Questions Power System Analysis

Subject name POWER SYSTEM ANALYSIS
Short Name PSA
Semester 5
Subject Code EE8501
Regulation 2017 regulation

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