400 kv switchyard pdf

Chapter8 switchyard equipment hv bus bars, switchyard. In those design where bus bar is continuous, provision is to be made available for isolation of individual bay without disturbing adjacent bay. The inrush currents at energizing of 100 mvar and 150 mvar hv shunt reactors have been observed for two cases. What is the difference between a substation and a switchyard. Nov 15, 20 sparking in 400 kv switchyard jayantibhai patel.

Owners supply materials osm 3311 kv power transformers, station 330. Operational description of 400kv switchyard ntpc ramagundam rstps. The switchyard is located approximately 850 feet southwest of the right abutment of the dam, and approximately 170 feet higher than the top of the dam. Attachment 3k sub qualifying requirements for the 400. Training report on 400 2202 kv switchyard in india design and engineering.

An analysis of the switching overvoltages on the 110 kv overheadcable line, cigre sc 33 international conference zagreb, croatia 1998. A 400 kv switchyard is located at a distance of 50 m approximately from the statcom valve. A 50 hz electrical substation in melbourne, australia. The 220 kv gis switchgear shall be of double bus bar design having phase wise separate or threephase common single enclosure. Between the generating station and consumer, electric power may flow through several substations at different voltage levels. Switchyard panel room 220kv 3 2kv 2 33kv 1 the contractor shall also supply necessary bcu for monitoring and. For 220 kv class enclosure it shall be single or phase wise separate metallic type. Electrical works 400 kv substation chapter7 400 kv substation 1.

The choice of incoming and outgoing voltages of substations is decided by the rated voltages and rated power of corresponding lines. Modeling and calculation of switching overvoltages in 400 kv. Switch yard 400 kv, bay02 location equipment date cursor1 cursor2 diff. Charge 400 kv bus at nagarjunasagar pgcil switchyard. The primary function of a 400220 kv substation would be to provide a conversion of different voltage levels so that power systems can be connected together to form a power system grid.

Lightening arrestors capacitive voltage transformer 400 kv switchyard ntpc safe guards the equipment by discharging the high currents due to lightning and to discharge the high voltage surges in the power system due to lightning to the ground. The aim of this paper is to study electric fields at a 400 kv substation to find out whether they exceed occupational exposure guidelines, 10 kvm, by international commission on nonionizing radiation protection icnirp. An extensive civil work comprising of 36 high mast tower foundations, 387 equipment foundations, 1650m of cable trench, 200000m3 earth filling with spreading of ballast and a double storied control building comprising of floor area with 590m2 each. Both type of breaker are selfcompensating spring to open and spring to close type. The whole substation is divided into three part 400kv,220kv and 33 kv and a common control room is used 5 6. Unitech is a leading iraqi company specialized basically in power and oil projects. Nov 17, 2019 two types of circuit breakers are used in 400 kv switchyard.

Pmi revision 00 presentation outline understanding basics of switchyard switchyard equipments and schemes components of switchyard. Pdf industrial training report on 400220kv substation of. The siemens experts always consider the electrical parameters as well as the environmental conditions to which a. Switch yard is the yard which is used to transmit the power to the load centres. Technical specification construction of 3311 kv primary substations. Chapter 7 400 kv substation free download pdf ebook. The air compressors and water cooling systems are installed around the building for the heat dissipation of the statcom units. Substation and switchyard both are different and these two switchyard is the inter connector between generation and transmission, and same voltage is mentained in switchyard, substation is the inter connector between transmission and distribution. For higher unit sizes of 660 800mw, 765kv level switchyards substations are. It is one of the important high voltage substation in maharashtra. They are renowned for highest reliability, economical operation, and low maintenance requirements. Attachment 3k sub qualifying requirements for the 400 kv. This is showing three of the five 220 kv 66 kv transformers, as well as highvoltage transformer fire barriers, each with a capacity of 150 mva. Long distance and high power transmission lines are at higher voltages.

Breakers, isolators, earth switch, ct, cvt, wave trap etc brief description of modes of transmission conclusion. Strange noise in 33 kv switchyard investigation duration. No description of technical parameter unit data 1 nominal system voltage kv rms 33kv 2 maximum system voltage kv rms 36. The aim of this paper is to study electric fields at a 400 kv substation to find out whether they exceed occupational exposure guidelines, 10 kv m, by international commission on nonionizing radiation protection icnirp. Supply in the package materials have been classified as under i. Pdf familiarization of 400 kv, 220 kv, 2 kv substation. Two types of circuit breakers are used in 400 kv switchyard. Pdf switching transients in 400 kv transmission network due to. Pdf transients due to switching of 400 kv shunt reactor. Download as pdf, 400200 kv substation 400200 kv substation design scribd 400200 kv substation design free download as pdf file graph of sp.

Modeling and calculation of switching overvoltages in 400. Training report on 4002202 kv switchyard in india design. This oneline sketch of a 3phase system shows a simple con. Download as pdf, 400 200 kv substation 400 200 kv substation design scribd. Extension of 400220 kv substation at gooty this is an existing substation owned by powergrid and shall have provision to accommodate following under this project. Training report on 4002202 kv switchyard in india design and. Basic of 400kv substation design scribd basic of 400kv substation design. Pdf the paper presents the case study of sf6 circuit breaker failure during switchingoff an. Download as pdf, 400200 kv substation 400200 kv substation design scribd. It has a daily load transaction of 1600017000 mwatt. By this we get to know about the operation of different equipments in switch yard and its maintainance.

Operational description of 400kv switchyard ntpc ramagundam. Summer training report on familiarization of 400 kv, 220 kv, 2 kv substation equipment venue 400220233 kv kukurmara grid substation. Transients due to switching of 400 kv shunt reactor. A substation is a part of an electrical generation, transmission, and distribution system. The substation is fed 16 mw power from 3 generating stations a,b,c through 400 kv single circuit lines working at around 87% loading the power is received on 400 kv busbar double main and transfer bus scheme. Pdf industrial training report on 400220kv substation.

One type has pir whereas other has no such provision. The subtransmission is at medium high voltage such as 33 kv, 11 kv ac. Internet of things on 230kv400 kv switchyard operation by. Highvoltage substations highvoltage power transmission. Jul 25, 2017 woodturning rough edge log into a vase hollowform. The fill for embankment ranges up to 27 feet in depth and the cut for excavation ranges up to 24 feet in depth. The substation is fed 16 mw power from 3 generating stations a,b,c through 400 kv single circuit lines working at around 87% loading. Switchyard substation upto 400kv have generally been installed in the country. Technical specification construction of 3311 kv primary sub. Nepal electricity authority project management directorate.

Siemens highvoltage substations with airinsulated switchgear ais are the costefficient choice for rated voltages of up to 800 kv. Hv substation project brief history et bihl d i 1987 f th il ti f l hv mv d established in 1987 for the realization of complex hv, mv and lv projects. Conclusion the overview of this project is about the various techniques involved in 400 kv switchyard of ramagundam power plant. Transients due to switching of 400 k v shunt reactor. Power frequency electric fields at a 400 kv substation. Location of lightning masts shall be finalised after approval of dslp calculations. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions. This substation is constructed using steel lattice structures to support strain bus wires and apparatus. It is a switching station which has the following credits.