busbar protection.ppt
TRANSCRIPT
-
7/31/2019 Busbar Protection.ppt
1/32
A MINI-PROJECT REPORTON
BUSBAR PROTECTIONIs submitted to
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY ANANTAPUR,
ANANTAPUR
Under the guidance ofMr. SHAIK MOHAMMED RAFI, M.E ,
Assistant Professor,Department of E.E.E.,
SIDDHARTHA INSTITUTE OF SCIENCE & TECHNOLOGY,PUTTUR.(An ISO 9001:2000 Certificate Institution)
(Approved by A.I.C.T.E. New Delhi & Affiliated to J.N.T.U.A., Anantapur)01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
2/32
OBJECTIVE :
o BUSBAR faults are rare but if theyoccur there can be interruption of
supply, considerable damage and loss
to the equipment, property and people
working around.
o Hence busbar protection must be fast
in operation, stable and reliable.
o This project deals with busbararrangements, protection schemes
used in 220KV substation
RENIGUNTA.01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
3/32
BUSBARS :
Conductors to which a number ofcircuits are connected.
The material used should have low
resistivity,higher softening temperature,
good mechanical properties and low
cost.
Supported on post or strain Insulators.
The flexible bus is held at higher levelabove the various sub-station
Equipment.
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
4/32
BUSBAR ARRANGEMENTS :
SINGLE BUSBAR :
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
5/32
WITH SECTIONALIZING BREAKER :
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
6/32
DOUBLE MAIN BUS &TRANSFER BUS SYSTEM :
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
7/32
DOUBLE BUS WITHSECTIONALIZE SYSTEM :
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
8/32
ONE AND A HALF BREAKERARRANGEMENT :
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
9/32
MESH ARRANGEMENT :
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
10/32
Busbar faults are generally single line to ground faults,
phase to phase faults
The main causes for a fault in a busbar :Failure of support insulator resulting in earth fault.
Flashover across support insulator during over voltages.
Heavily polluted insulator causing flashover.Failure of connected equipment to the busbar.
Various environmental conditions.
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
11/32
-
7/31/2019 Busbar Protection.ppt
12/32
Depending upon the rating of the machine, its
location, relative importance, probability of faults
and abnormal conditions etc., each power system
component is covered by a protective zone.
Differential protection
High impedance protection
Low impedance protection
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
13/32
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
14/32
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
15/32
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
16/32
SATURATION CURVE :
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
17/32
The problem of
CT saturation
is eliminated at
its source by
air-core CTs
called linearcouplers.
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
18/32
LBB: Local Breaker Backup Relay.
BFR: Breaker Failure Relay.
CBF: Circuit Breaker Failure Relay.
LOCAL BREAKER BACKUP PROTECTION
Remote back-up
Local back-up
Relay back-up
Breaker back-up
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
19/32
MAINPROTECTIONOPERATED
YES
YES
TRIPMAIN
BREAKER
INITIATEBFR
WAIT FORFAULT
CLEARENCE
AND
FAULTCLEARED
YES
NO
RESETBREAKERFAILURESCHEME
TRIPBACK-UP/Adjacent
BREAKERS
RETRIP
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
20/32
BUSBAR PROTECTION SCHEME AT220KV SUBSTATION RENIGUNTA :
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
21/32
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
22/32
S.no Particulars Ratio available Ratio AdoptedFor Buabar
1 220KV manubolufeeders 1&2
800/1-1-1-1-1A 800/1-1A2
220KV mahadeva
mangalam feeders 1&2 800/1-1-1-1-1A 800/1-1A3 220KV c.k.palli 800/1-1-1-1-1A 800/1-1A4 220Kv koduru feeder 800/1-1-1-1-1A 800/1-1A5 220KV bus coupler 800/1-1-1-1-1A 800/1-1A6 HV breakers of
100MVA, 220/132KV
transformers 1, 2 &3
300/1-0.66-.375-.375-1A 300/0.375-0.375A7 Bus-1 C.T 800/1-1-1-1-1A 800/1A8 Bus-2 C.T 800/1-1-1-1-1A 800/1A
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
23/32
The existing PBDCC scheme at 220 KV SS Reniguntamainly comprises of 3 panels.
CT Switching panel
Busbar protection panel
Auxiliary relay panel
The full form ofPBDCC/PBDCB is as follows:
P- Protection
B- BusbarD- Differential principle
C- Check zone
B/C- No additional function/additional function (bus
supervision relay)01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
24/32
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
25/32
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
26/32
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
27/32
S.no Particulars Ratio available Ratio AdoptedFor Buabar
1 220KV manubolufeeders 1&2
800/1-1-1-1-1A 800/1-1A
2 220KV mahadevamangalam feeders 1&2 800/1-1-1-1-1A 800/1-1A
3 220KV c.k.palli 800/1-1-1-1-1A 800/1-1A4 220Kv koduru feeder 800/1-1-1-1-1A 800/1-1A5 220KV bus coupler 800/1-1-1-1-1A 800/1-1A6 HV breakers of 100MVA,
220/132KV
transformers 1, 2 &3
300/1-0.66-.375-.375-1A300/0.375-0.375A
7 Bus-1 C.T 800/1-1-1-1-1A 800/1A8
Bus-2 C.T
800/1-1-1-1-1A 800/1A01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
28/32
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
29/32
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
30/32
Busbar has a great importance in the power system and
its protection is essential for smooth stabilised and saferoperation of the network.
In this project,a basic understanding of bus arrangements
and types of busbar protection schemes and the studyextended to BUSBAR PROTECTION IN 220KV SS
RENIGUNTA.
The busbar arrangement used in 220KV SS RENIGUNTAis double bus arrangement. Even we made some relays
testing related to busbar protection i.e. bus supervision
relay test and differential relay test.
01/08/2011 Dept. of EEE,SISTK
-
7/31/2019 Busbar Protection.ppt
31/32
A course in Power systems - J.B.GUPTA
Switch Gear Protection and Power System - SUNIL S. RAOTechnical Reference Book - APTRANSCO
Power Systems Protection and Switchgear
- BADRI RAM ,D. N. VISHWAKARMA
www.electricity-today.com/et/Novdec96/busbar.html
www.ee.iitb.ac.in/~npsc2008/NPSC_CD/Data/Oral/CIC2/p110.html
www.abb.com/product/us/9AAC30301050.aspx
www.fecime.org/referencias/npag/chap15-232-253.html01/08/2011 Dept. of EEE,SISTK
http://www.electricity-today.com/et/Novdec96/busbar.htmlhttp://www.ee.iitb.ac.in/~npsc2008/NPSC_CD/Data/Oral/CIC2/p110.htmlhttp://www.abb.com/product/us/9AAC30301050.aspxhttp://www.abb.com/product/us/9AAC30301050.aspxhttp://www.abb.com/product/us/9AAC30301050.aspxhttp://www.ee.iitb.ac.in/~npsc2008/NPSC_CD/Data/Oral/CIC2/p110.htmlhttp://www.ee.iitb.ac.in/~npsc2008/NPSC_CD/Data/Oral/CIC2/p110.htmlhttp://www.electricity-today.com/et/Novdec96/busbar.htmlhttp://www.electricity-today.com/et/Novdec96/busbar.htmlhttp://www.electricity-today.com/et/Novdec96/busbar.htmlhttp://www.electricity-today.com/et/Novdec96/busbar.html -
7/31/2019 Busbar Protection.ppt
32/32