epsp pre labs
DESCRIPTION
these are the questions for final lab of pspTRANSCRIPT
For Academic Session 2013
(EE-455)
Electrical Power System Protection
Pre-Labs
Prepared by: Dr. Memon
Department of Electrical Engineering
N.E.D. University of Engineering & Technology, Karachi
Pre – Lab: 01
Q No. 01: Describe working of DC shunt motor with its equivalent circuit ?
Q No. 02: Describe working of synchronous generator by its equivalent circuit?
Q. No. 03: What is the importance of phase sequence and why it should be detected?
Q. No. 04: If one phase among three gets failed what is the effect on machines?
Q. No. 05: Why load unbalancing should be avoided?
Q. No. 06: Explain Negative sequence components and in what conditions they are produced
in power systems ?
Q No. 7: What are the effects of negative sequence components in power systems ?
Pre – Lab: 02
Max. / Min. Voltage relay in 3ϕ Network
Q. No. 01: What is the role of reactive power in the power network?
Q. No. 02: How inductive load affect Voltage level in the circuit?
Q. No. 03: Can power factor improvement affect Voltage level?
Q. No. 04: What are the other methods to improve Voltage levels?
Q No. 05: Define Voltage Stability and its relationship to lack of reactive power in
System ?
Pre – Lab: 03
Study and apply a Max. / Min. frequency relay.
Q. No. 01: How frequency of Generator can be changed?
Q. No. 02: How inductance of power system can be changed?
Q. No. 03: Which relay can be used for load shedding?
Q No. 4: What is the effect of AGC (Automatic Generation Control) in power system?
Q No. 5: Define Angle stability and its relationship with the change of frequency in the
system?
Pre – Lab: 04 + 05
Application of over current relay
Q. No. 01: Describe temporary overload condition?
Q. No. 02: Describe continuous overload conditions?
Q. No. 03: Describe a technique to differentiate between temporary overload and continuous
overload?
Q. No. 04: How to differentiate between overload and short circuit conditions?
Q. No. 05: What do we mean by on-delay timer?
Q. No. 06: What do we mean by off delay timer?
Pre – Lab. No. 06
Remote Signaling
Q. No. 01: Give some important level sensing examples in power systems?
Q. No. 02: Give some examples of other industries except power systems where level
sensing is very important / critical?
Pre – Lab. No. 07
Current Transformer
Q. No. 01: Describe the importance of CT error?
Q. No. 02: Explain CT error calculation by giving an example?
Pre – Lab. No. 08
Voltage Transformer
Q. No. 01: Describe importance of VT error?
Q. No. 02: Describe VT error calculation by giving an example?