2018 ijrar july 2018, volume 5, issue 3 e -issn 2348 1269 ...ijrar.org/papers/ijrar_201429.pdf ·...

© 2018 IJRAR July 2018, Volume 5, Issue 3 www.ijrar.org (E-ISSN 2348-1269, P- ISSN 2349-5138)

IJRAR1601009 International Journal of Research and Analytical Reviews (IJRAR) www.ijrar.org 25

Asset Management in Establishment of EHV

Substation 1Urvashi Trivedi, 2Vikash Verma

1M-Tech Student, 2Professor 1Electrical Engineering Department,

1Parul University, Vadodara, India

________________________________________________________________________________________________________

Abstract: Sustainable power is the need of modern fast-growing civilization. As the worldwide demand for electric power keeps

growing on a scale simply unimaginable a few decades ago, new extra high voltage substation is required to ensure reliable power

system. These substations should be highly economical in operation and maintenance throughout their entire service life as well as

with space having become enormously precious, especially in the fast-growing megacities and conurbations around the world,

space-saving design is essential. To ensure reliability of power system and provide optimal substation design substation automation

and gas insulated substation are the key solution of modern substation design. The paper presents about new establishment of

different switchyard like Air insulated substation, Gas insulated substation, Hybrid substation with the asset management.

Index Terms - AIS, GIS, HS, Asset Management, Establishment ________________________________________________________________________________________________________

I. INTRODUCTION

Electrical power appropriation framework, the past substation more often than not contained Air-Insulated Switchgear (AIS). The

requirement for increasingly practical and space-sparing arrangements has prompted the advancement of new reduced Gas Insulated

Substation. Giving the full usefulness of an air protected substation in far less space, these reduced arrangements likewise offer

shorter establishment times and coordinate preferable in their encompassing over normal AIS substation.

Figure 1: Single Line Diagram of EHV Substation

Single line diagram of EHV sub-station in this system uses one and half breaker scheme for 400 kV and three bus system; two main

and one transfer bus system for 220 kV. For 400 kV system, we have implemented four incoming lines, two transformer bays to

fulfill existing needs and provisioned four incoming lines, two transformer bays for future expansion. For 220 kV system, we have

implemented six outgoing lines, two transformer bays to fulfill existing needs and provisioned six outgoing lines, two transformer

bays for future expansion.

II. AIR INSULTED SUBSTATION

Air-insulated substations utilize air as a protecting medium, requiring bigger dielectric separations to avert electrical arcing between

the conductive external pieces of medium-and high-voltage gear. As recently referenced, the region required for the establishment

and coordination of the AIS hardware is exceptionally expansive contrasted with that required by new advancements available, for

example, the GIS. The AIS utilizes air as the essential dielectric from stage to stage, and stage to ground protection. They have been

being used for a considerable length of time before the presentation of GIS.

In reality, most substations over all areas are AIS. They are in broad use in zones where space, climate conditions, seismic events,

and natural concerns are not an issue, for example, provincial regions, and ideal offsite landscape.

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The indoor AIS rendition is just utilized in exceptionally dirtied regions, and saline conditions, as the air quality is undermined.

Figure 2: Symbol of Layout

Figure 3: Plan Layout of AIS




Figure 4: Sectional Elevation of AIS

III. GAS INSULTED SUBSTATION

The first GISs were created somewhere in the range of 1968 and 1972; a few nations later started utilizing this innovation in their

electrical substations because of its minimized plan. Gas protected switchgear innovation (GIS) where the gear is introduced in a

metal walled in area with a pressurized vaporous, dielectric medium (SF6). This gas has a higher protecting an incentive than air,

permitting an increasingly minimal plan contrasted with the air protected high voltage substations.

Basically, in the GIS framework, all the live parts are encased in a grounded metal fenced in area, at that point the entire

framework housed in a load brimming with gas. Gas protected substations (GIS) essentially use sulfur hexafluoride gas as the

essential cover. SF6 is non-lethal, keeps up nuclear and sub-atomic properties even at high voltages, high cooling properties, and

unrivaled bend extinguishing properties.

What's more, is sheltered. SF6 has better dielectric properties looked at than different gases; in this way give ideal protection to

the stage to stage and stage to ground balance. In the substation setup, the gas is contained in a grounded metal nook containing

the conveyors, current and voltage transformers, electrical switch interrupters, switches, and lightning arrestors.




Figure 5: Plan Layout of GIS

Figure 6: Layout of GIS




Figure 7: Sectional Elevational of GIS

IV. HYBRID SUBSTATION

The HSs have a mix of air-protected segments with SF6-protected segments. In this course of action, the bars are as yet secluded

via air, and just the switchgear hardware, just as the estimating and overhead cutting edges, is inside an encompass metal

monophasic utilizing the GIS innovation.

Half and half substations consolidate gas-and air-protected switchgear advancements to influence the establishment progressively

conservative, to limit upkeep prerequisites and boost accessibility and unwavering quality.




Figure 8: Plan Layout of HS

Space use is not exactly the AIS however more noteworthy than the GIS. The procedure of separation of the particle takes

up warmth and permits cooling of the electric curve. Recuperation after a circular segment is quick (dielectric

inflexibility). There is no wear on the protection. There are problem areas in the protected components noticeable all

around. The dielectric unbending nature isn't influenced by the earth. The gases created by circular segments are not

produced into the air. The future is 30 years. The hardware is littler, increasingly like that in the GIS. There is less misuse

of material toward the finish of its valuable life than the AIS yet more than the GIS.

Since minimized half breed module innovation has been created by makers that structure and produce SF6 gas protected

substations, the parts of the modules are fundamentally the same as the segments of a GIS. Cross breed modules have

been connected in activities of substations in numerous nations, from little to extensive utilities, in two fundamental cases:

I) new establishments and, ii) updates of existing substations.




Figure 9: Sectional Elevation of HS

V. ASSET MANAGEMENT

Figure 10: Block Diagram of Asset Management




Asset Management should be done in following categories during establishment of new EHV substation:

Design Engineering

Purchase Activity

Construction Procedure

Testing Activity

Commissioning of EHV Substation

Power engineers center around Design Engineering work. When they complete structure of substation, it is submitted for

endorsement of power, purchaser and PMC. Amid the endorsement procedure purchaser sends demand for statement to different

production. When specialist office supports the plan, purchaser begins concluding orders of types of gear according to specialized

determination. Testing Engineer is named for the observer of processing plant testing. All the while temporary worker begins

establishment movement and structure action. Production line tried hardware or module will be transported to the site for

establishment technique. After the fulfillment of all development movement, the group of testing and charging engineers are named

for appointing technique of EHV substation.

It will require a ton of investment in the event that we pursue customary methodology of foundation of new substation. As

purchaser can not buy gear until entire plan is done and endorsed by power. In this manner, it is prescribed to separate entire

assignments into need based subtasks which will spare time and cost.

VI. CONCLUSION

Air Insulated Substation is most reasonable for the application where expansive territory is accessible. In any case, amid the lack

of land region which is serious issue, these days, Gas Insulated Substation is the key arrangement of current substation structure.

Prior substation typically involved Air Insulated Substation yet ongoing need of new power age unit with restricted accessibility of

land prompts the advancement of new space-sparing Gas Insulated Substation. Cross breed unit might be utilized in any of transport

design of transmission substation. Execution of half breed unit, just as the subsequent decrease of the measure of the substation,

impacts on entire ideas of common and electromechanical works associated with the development of a substation. Cross breed

framework can be effectively introduced in new substation or while overhauling a current substation.

VII. REFERENCES

[1] Jennifer j crisp,” Asset management in Electricity Transmission Utilities: Investigation into Factors Affecting and their impact

on the network,”August 2003.

[2] J. Quintana, B. Marin, “Substation switching arrangements using compact hybrid modules,” 4th International Conference on Renewable Energy Research and Application, Palermo, Italy, 22-25 Nov 2015.

[3] IEC 62271-205, “High voltage switchgear and control gear – compact switchgear assemblies for rated voltages above 52kV,” International Electrotechnical Commission (IEC), Switzerland, 2008.

[4] Luisivan Ruiz Flores, Nestor A. Hernandez M Unoz, Israel Salazar Castro, & Valentin Martinez Torres, “gas insulated and hybrid substation,” IEEE Industry Application magazine, Sep-oct (2014).

[5] Ingo Jeromin, Gerd Balzer, Technische Universitat Darmstadt, jurgen Backes, Richard Huber, EnBW Regional AG Stuttgart, “Comparison between gas- and air insulated network concepts with the life cycle cost method,” Modern Electric Power Systems 2010, Wroclaw, Poland.

[6] LARUELLE Elodie, KIEFFEL Yannick, “Environmental impact comparison between a 220 kV Gas-Insulated Substation and a 220 kV Air-Insulation Substation,” IEEE Conference, 2013.

[7] Tik Son Wong, Jose Lopez-Roldan, Tapan Saha, “Development of a life cycle cost estimating tool to compare GIS and AIS substation projects,” IEEE Conference,2015.


2018 ijrar july 2018, volume 5, issue 3 e -issn 2348 1269 ...ijrar.org/papers/ijrar_201429.pdf ·...

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