vishwas jain
TRANSCRIPT
Submitted to
Mr. Damodar kumawat
(h.o.d. eee dept.)
submitted byVishwas jain
11emhex062
submitted by vishwas
Power Supply Installation (PSI)
Overhead Equipment (OHE)
Remote Control equipment◦ RCC [Remote Control Center]
◦ SCADA- [Supervisory Control and Data Acquisition system]
Types of traction system
Advantages of using electric traction system
Types of electric traction
advantages of electric traction
locomotives
Tss , sp , ssp
Ohe equipment
Breaking
submitted by vishwas
Action of drawing some thing over a surface
Or the system which uses electric power for traction is called electric traction
submitted by vishwas
Non electrical traction 1) steam engine drive2) internal combustion-engine drive
Electrical traction1) self contained vehicles
2) vehicles which receive electric power
submitted by vishwas
submitted by vishwas
Cleanliness
Low Maintenance cost
Less Starting time
High starting torque
High acceleration
High traffic handling capacity
Easy Breaking
submitted by vishwas
Electric Traction Systems
DC Traction AC Traction
1- phase 3-phase
Multi system
submitted by vishwas
power
supply
•1500 v dc supply is used
•Both ohe & third rail method can be used
Dc series
motors
•High starting torque
•Smaller weight to H.P ratio
•Low maintenance cost
•High rate of acceleration & retardation
substation
•Fed with 33 to 133 kv 3-phase power supply
•Convert high vtg 1500 or 3000 v ac supply
•Basically contain x-mer rectifier & converter ckts
submitted by vishwas
Power
supply
•25 kv electrical power supply is use in ohe
•High vtg is use to reduces the losses in overhead lines
•Because of high vtg is use distance b/w s.s increases
•Third rail method cant be use in ac system
substation
•Sub station is fed to 132kv supply
•This high vtg is converted into 25 kv ac supply
•Sub station in ac system are cheaper
•Basically contain x-mer
•Some times frequency converters are also use at ss•
Series dc
motors
• In locomotives dc series motors are use
submitted by vishwas
I. High Starting torque
II. Low maintenance cost
III. High rate of acceleration & retardation
IV. Easy speed control
Disadvantage
I. Only one disadvantage is the necessity of locating ac/dc conversion substations at short distance apart.
submitted by vishwas
Advantage of 25 KV AC Traction over 1500 V DC Traction
Reduced requirement of copper, steel for supports and cement because foundations are lighter.
Increased substation spacing - 50 to 80 kms as compared to 8 to 10 kms for DC traction.
There is direct application of industrial frequency.
submitted by vishwas
submitted by vishwas
submitted by vishwas
Traction Substation or feeder post
(SSPs)-Sub Sectioning Post
SP
Ohe (over head equipment)
Centenary , droppers , contact wire
Running rails work as return path
Boosters transformers
Pantograph
submitted by vishwas
submitted by vishwas
substation
Single
phase ac
Dc
substation
submitted by vishwas
SCHEMATIC DIAGRAM OF TRACTION SUB STATION
Traction Sub Station
R,Y R,Y (220/132/110 Kv)
LOCO
RAIL
OHE
25 KV AC Single phase
submitted by vishwas
TSS 1 TSS 2
Neutral section
(SP)
(SSPs)
(SSPs)-Sub Sectioning PostSub-Sector
Sector
SCHEMATIC DIAGRAM
submitted by vishwas
submitted by vishwas
submitted by vishwas
submitted by vishwas
Ratingsfor l.v. 42kv
for hv 120kv
submitted by vishwas
A short section of insulated dead over-head equipment which separates the sectors fed by two adjacent substations which are normally connected to different phases.
submitted by vishwas
OHE Arrangement
Mast
Mast
Centenary Wire
Contact Wire
Dropper
Automatic Tensioning
Device
submitted by vishwas
Auto Tensioning Device (ATD)submitted by vishwas
submitted by vishwas
Contact wire –◦ cross sectional area - 107 sq.mm.◦ diameter - 12.24 mm◦ normal tension – 1000 kg◦ breaking load – 3905 kg
Catenary wire –◦ cross sectional area - 65 sq.mm.◦ diameter – 10.50 mm◦ Normal tension – 1000 kg◦ breaking load – 3920 kg
submitted by vishwas
DROPPERS◦ A fitting used in overhead equipment
construction for supporting contact wire from catenary
BONDS◦ An electrical connection across a joint in or
between adjacent lengths of rail
(structure bond, continuity bond, cross bond etc.)
submitted by vishwas
submitted by vishwas
Modern microprocessor technology and the availability of efficient and compact power components have changed that picture. In 3-phase AC locos, the input (single-phase AC) from the OHE is rectified and then 3-phase AC is generated from it, whose voltage, phase, and frequency can be manipulated widely, without regard to the voltage, phase, frequency of the input power from the OHE
submitted by vishwas
submitted by vishwas
submitted by vishwas