The Key Diagram of Substation can be explained as under:. Such an arrangement of two incoming lines is called a double circuit.
Each incoming line is capable of supplying the rated sub-station load. Both these lines can be loaded simultaneously to share the sub-station load or any one line can be called upon to meet the entire load. The double circuit arrangement increases the reliability of the system. The advantage of double bus-bar system is that if repair is to be carried on one bus-bar, the supply need not be interrupted as the entire load can be transferred to the other bus.
There is an arrangement in the sub-station by which the same 66 kV double circuit supply is going out i. The outgoing 66 kV double circuit line can be made to act as incoming line. There is also an arrangement to step down the incoming 66 kV supply to 11 kV by two units of 3-phase transformers; each transformer supplying to a separate bus-bar.
Generally, one transformer supplies the entire sub-station load while the other transformer acts as a standby If need arises, both the transformers can be called upon to share the sub-station load.
Kuwait invites bid for Construction of four 132/11kV Substations
The 11 kV outgoing lines feed to the distribution sub-stations located near consumers localities. Both incoming and outgoing lines are connected through circuit breakers having isolators on their either end. Whenever repair is to be carried over the line towers, the line is first switched off and then earthed.
The potential transformers P. The P. The CTs are connected at the terminals of each circuit breaker. The lightning arresters are connected near the transformer terminals on H. There are other auxiliary components in the sub-station such as capacitor bank for power factor improvement, earth connections, local supply connections, d.
The key diagram of this sub-station can be explained as under:. The 3-phase, 3-wire 11 kV line is tapped and brought to the gang operating switch installed near the sub-station. The G. From the G. It is fed to the H.Hello guys, welcome back to my blog. If you want an article on some other topics then comment us below in the comment section. There are different types according to voltage level, constructions, etc. Firstly every substation has its Single line diagram where all details are denoted like rating of all equipment, connections, places, and locations.
Control room: where the operator sited to control substation here alarm is placed he knows every interruption. Maybe fault, tripping, 33KV breakdown and burning of cables. Battery room: Batteries are connected in series to produce DC supply maybe V or V only the control voltage of every substation supply with a battery charger. It Contains boost or float mode when we want fast charging of batteries to use boost mode if we want slowly charging of batteries to use float mode.
Switchyard: it contains the following equipment. Power transformer: The transformer is the heart of the electrical system. Its work is to step down the voltage level from 33 to 11 kV. The potential transformer is used to measure voltage. Circuit breaker: For making and breaking purpose breaker are used. We can break cut off supply of particular feeders by this. Also, breakers are tripped off in a faulty condition.
Each feeder individual has a circuit breaker. Usually, here we use Air circuit breaker. Bus Bar: These are bundled conductors where we can connect several feeders, loads or connections. If there is one Bus bar 11KV on which we can connect Feeder -1, Feeder-2, Feeder-3 It may be the name of villages or particular residency and so on. Feeders: By using feeders we can control electricity of a particular area.
Lightning arrester: Used for protection. Located at incoming line i. When there is lightning stroke fall at that time it discharges from the ground terminal.
Capacitor bank: Used to maintain power factor unity due to avoid penalty from the state electricity board.
It must be maintained unity. Insulators: Mainly two types of insulators used pin type for up to 11 kV and suspension type for above 33KV. Mounting structure: Used to carry conductors and jumpers also for mounting isolators. Station transformer: Used for building lighting as a Backup supply. Cables: They are used to carry electricity from the battery room to feeders, measuring meters, Transformers, control, and relay panels.Sign up with Facebook Sign up with Twitter.
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Skip to main content. Log In Sign Up. Irfan Khan M Tech. The demand of electricity is being increased day by day. Therefore many new projects are being introduced not only in town as well as in remote areas also to provide the facilities of electricity by Constructing new transmission lines and Switchyard. The Line route should be so selected that the maintenance is easy and the line does not cause Obstruction to vehicular traffic and should be shortest, as well, consistent with engineering and economic principles.
The transmission lines shall be routed, where ever possible to avoid difficult terrain and natural obstacles such as steep hills, dense forests, landslides, lakes, rivers, highly developed areas, etc.
Transmission lines should not also cross school-yards. The correct and accurate Survey results in speedy construction and saving of unnecessary alignment and realignment at the time of carrying out actual construction work.
All measurements should be taken with utmost accuracy and similarly the line charts and the profiles should be prepared with great care and precaution. Where the lines are constructed over farm-land, structures and anchors shall be so located as to interfere as little as possible with farming operation. Wherever such structures and anchors become necessary, the same shall be located along fencing or in any uncultivated areas.
While aligning for poles or for underground cabling, care should be exercised to determine the location of all underground services such as water mains, sewers, telephone cables, power cables, land drainage tiles, gas, and oil pipe lines etc. The Transmission lines shall be routed to avoid buildings and build up areas wherever possible. Where Switchyard means collection of equipment where high voltage electricity is switched using of various components.
Electrical Switchyard is usually a part of Substation where electricity is transferred from one Voltage to another for the Transmission and Distribution purpose.
33/11 KV Substation | Components Used In Substation
Minimum separation distance between power and Communication Circuits should be kept as 61 metres ft. The holes for cross- arm, F- bracket and other fitting should be drilled in the supports before these are transmitted to site. After inspection, the line is meggered by volt megger and insulation resistance between phases and, between phase and earth is noted. The various main structures used in construction of switchyard are configurations of equipments are:- Transformer, L.
Download: 33/11 Kv Substation Construction Manual.pdf
T, Line Isolator and Terminal Gantry. The sequence of Equipments used in switchyard from starting point of transformer to the end point of terminal gantry is given as:- 3. The transformers are generally used to step down or step up the voltage levels of a system for transmission and generation purpose.
These transformers are classified into different types based on their design, utilization purpose, installation methods, and so on. Lightning Arrester- The substation equipments such as conductors, transformers, etc. Whenever light surges occur then, a high-voltage pass through these electrical components causing damage to them either temporary or permanent damage based on the amount of voltage surge.
Therefore, to avoid this difficulty, lightening arresters are placed to pass the entire lightening surges to earth. There are other arresters which are used to ground the switching surges called as surge arresters. Current Transformer - It is used for the measurement of the alternating current by taking samples of the higher currents of the system.June 8, Comments.
The insulators shall be suitable for the minimum failing loads specified as under:. Filed under Uncategorized. About Jignesh. Parmar B. Tech Power System ControlB.
Membership No:M He is Presently associate with one of the leading business group as a Deputy Manager at Ahmedabad,India. Kindly mention the standard percentage of conductor sag between two poles for different types of ACSR conductors for approximate analysis of conductors utilisation.
I wait to hear from you. Regards Kenny. Any design course you offer or any books that is to be refer. What should be the minimum spacing between LT overhead conductors? Is there any IS or IE rule for this.
Yes In both Horizontal congu. Please read my Abstract notes. You will find it. Minimum Distance??? Right from pole pit dimension to stringing.Now the transmission line first parallel connected with lightning arrester to diverge surge, followed by CVT connected parallel. CVT measures voltage and steeps down at V. A current transformer is connected in series with line which measure current and step down current at ratio for control panel. At both ends of transformer lightning arrester current transformer and switchgear equipment provided.
Transformer step downs voltage from KV to 33KV. Capacitor bank is connected to main bus of 11KV. There is no clarity in description and it gives no new information. A single line diagram would be better. Search for:. Premium Membership. More Information. Power substation guides, research papers and studies. Switchgear equipment is provided, which is the combination of a circuit breaker having an isolator at each end. A transformer is connected to main bus though a bus coupler.
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Hi plzzzz give me this report i really need it tomorrow is my submission Dec 20, Nissi Engineering Solution May 10, Leave a Comment Cancel Reply. Subscribe to Weekly Digest Get email alert whenever we publish new electrical guides and articles. The content is copyrighted to EEP and may not be reproduced on other websites.220kV / 66 kV Electrical Substation All Explained - Live Tour 🔴
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