ADVANTAGES OF PACKAGE SUBSTATIONo AIM To Explain the Advantages and Disadvantages of proposed Package substation for G58 WTG in Place of Conventional outdoor DP Yard. Humidity. Product will fit to the needs of quality and standards • Control of Quality shall be maintained at all levels.WHY PREFABRICATED SUBSTATIONS? o Reliability: IEC 62271-202 Complaint Substations • • • • That mean resistance to the Temperature Rise. Equipment Life Span Service Continuity Public and Operator Safety o Quality and Standardization • Definition of LV/MV substation design including the right components solution to fit to the standards • Since factory assembled and tested. etc. . Pollution. Single line diagram of proposed Package Substation . GENERAL ARRANGEMENT . GENERAL ADVANTAGES PACKAGE SUBSTATION CONVENTIONAL SYSTEM o o o o o o Compact and Safety superior. Aesthetically superior. Fully compartmentalized no accidental access to the live parts. Transportable and Ready to install. The CT & PT can be housed in a separate cubicle with tamper proof sealing arrangement . Minimal Maintenance EB metering. LIGHTINING ARRESTOR Conventional System Package Substation . LIGHTINING ARRESTOR Conventional System Package Substation Conventional System Package Substation • Made up of porcelain • Lighter in weight almost 90% of weigh is reduced • Heavy and it is hard to handling • Easy handling • Could have hidden defects that are hard to detect • • Vandalism is common • • Pin erosion and coupling hardware corrosion • Better performance in high contamination area Better handling of shock loads • Cement growth cracking more resistant to vandalism • Weaker in tension • Stronger in tension . the alignment won't be that precise • Number of accessories are involved so it is hard to have a spares • Work at height is involved • Closing and Opening are mostly depends on the Operator physical strength .PROTECTION IN CONVENTIONAL SYSTEMS AB SWITCH / ISOLATOR • Since the Fabrication is done is site. work at height is involved.PROTECTION IN CONVENTIONAL SYSTEMS HORN GAP FUSE •The reaction time to blown the fuse during the fault is relatively slow when compared to VCB •Once the fuse is blown it is hard to detect •At the time of replacing the blown fuse. so extra safety measures to be taken . PROTECTION IN PACKAGE SUBSTATION MV SWITCH GEAR •Hence it is a factory made there will not be any alignment problem •Self powered relay are used to trip the circuit •In case of fault the fault circuit is isolated by tripping VCB rapidly •MV switch gear has a disconnector switch which can be connected to earth at the time of service •Since it is a factory made the standard quality of the materials can be obtained •Maintaing inventory is quite easy . BUS BAR ARRANGEMENT IN CONVENTIONAL SYSTEM BUS ARRANGEMENT -ACSR CONDUCTOR • • Since there is more no of terminals and joints the voltage drop is high Hence it is exposed to atmospheric condition easily contaminated by rust • • • Having risk of working at height Having risk of external faults Possible of having accidental access to the live parts . so voltage drop is minimized •Hence it is in a cubicle the atmospheric condition may not affect •External faults wont take place •Accidental access to the live parts are avoided •Personnel safety is assured .PACKAGE SUBSTATION •Electrical connections are done by the cable and the Aluminium bus.BUS BAR ARRANGEMENT IN PACKAGE SUBSTATION BUS BAR ARRANGEMENT . CONVENTIONAL SYSTEM •Since it is a oil type. Bird Fault) .CONVENTIONAL SYSTEM MEASURING CTPT.MEASURING CTPT. there is a chance of oil leakage •Possible of danger of fire and explosion •Possible of External Fault (Ex. PACKAGE SUBSTATION MEASURING CTPT. the life time of the CTPT is longer • Provides Excellent mechanical and short ciruit strength • Less Weight and easy to handle • No danger of fire explosion .PACKAGE SUBSTATION • It’s a dry type transformer.MEASURING CTPT. . . . . . since do ne labo urs at site with unskilled labo urs Needs mo re space o n co ntracto rs sco pe High ( invo lves transpo rtatio n fro m facto ry to site yard. o f labo urs and fabricatio n to o ls invo lved are mo re and hence wo rkmenship will no t be as go o d as P SS Fabricatio n and wo rking at height is invo lved High expo sure will be po o r. since do ne with "0" gauge co pper with lo cally purchased lugs and co nnecto rs difficult mo re . gate and flo o r co ncreting / metal spreading A dditio nal retaining wall with increased height to match gro und level and backfilling the same with so il fo r who le very less (o nly pillar height with additio nal reinfo rcement ) yard area Fo r co astal area .humid and mo isturo us enivo rment 6 7 8 9 1 0 Equipment interco nnectio n M aintenance and o peratio n P ending po ints Space requirement Tresspassing 1 Civil wo rks invo lved 1 1 A dditio nal civil wo rks fo r lo w lying area 2 1 High temperature. bird faults and 5 dusty. no . no . Co ntracto rs sco pe yard to lo catio n) Crane is required fo r unlo ading and lo ading at yard and o nly hydra fo r transfo rmer unlo ading and lo ading at yard erectio n at lo catio n and erectio n at lo catio n very less (o nly fo ur pillars after P CC) . fencing.as all activities are at site high (1 mtrs X 9 mtrs) 2 easy as o nly fencing is available 2 Quality o f the materials A ll materials are o f reputed make Since it is facto ry made cubicle with skilled labo urs. o f jo ints and po o r welding is po ssible. metering bo x. high humid and high dust area 3 1 Equipment earthing system 4 1 Sto rage at site 5 Co st o f Transpo rtatio n 1 6 Crane requirement 1 7 invo lves co ncreting fo r all the po les.transfo rmer. wo rkmenship will be go o d P erso nnel safety will be go o d as there is no fabricatio n and wo rking at height risks are invo lved No expo sure as it is metal enclo sed will be go o d as it invo lves cables and alumnium bus bars with pro per terminatio n simple almo st zero as it is prefabricated less (4 mtrs X 3. very difficult to co ntro l quality and also mo re no o f accesso ries and hardwares are invo lved Since all are fabricated at site.o nly anti co rro sio n painting to be In additio n to GI structures. No mo dificatio n in equipment specificatio ns creepage to be installed will be go o d as prefabricated and do ne with skilled mo re no . equipments with higher do ne.5 mtrs) difficult as it is metal enclo sed 3 Wo rkmenship 4 P erso nnel Safety at site Expo sure to external lighting. o f days.COMPARISON BETWEEN PACKAGE SUBSTATION AND CONVENTIONAL SYSTEM D E S C R IP T IO N 1 Erectio n time P A C KA G E S UB S T A T IO N < 2 ho urs C O N V E N T IO N A L O UT D O O R D P Y A R D 7 to 1 days 5 A s the co ntracto r is buying mo st o f the materials. THANK YOU .