Clientele - Power System Study Network Analysis and Solutions

AV Cell, AV Terrace Bay and AV Nackavic - Canada

All the three units are manufacturing pulp and have 132kV Grid support and approximately 30/40MW STG Power Plant with contra rotating turbines running in parallel with grid. The major issue was grid islanding not occurring and machines were tripping resulting into total dark out. The feasibility study carried out for all the three plants and detail study completed for AV Cell. Other two plants study under consideration and shall be taken up accordingly. The study also includes Transient Stability and Grid Islanding as well as Load Shedding for various outage conditions.

Rajashree Cement Works, Malkhed Road, Gulbarga, Karnataka

A Cement plant having 58.5MW Captive Power Plant Generating Power at 6.6kV and load of Line - 1, 2 & 3 at 6.6kV. Plant expanded with Line-4 having 45MW load at 11kV and a new TPP having generation capacity of 67MW at 11kV. Plat has grid support from KPTCL at 110KV. Feasibility study was conducted to have batter reactive power margins to avoid the blackout post fault condition. Suggestions for 110kV new line and switchyard for transferring the surplus power from 11kV to 6.6kV were given.

Schneider Electric Infrastructure Ltd.

Cairn India Limited, Radhanpur Terminal

A Viramgam - Barmer crude oil line has a pumping cum heating station at Radhanpur Gujarat. Terminal receives the 11kV power from nearby GETCO S/s and has further load Distribution at 440V. Plant has 2 x 3.15MVA, 11kV / 440V Transformers and five nos. DG sets at 440V. Short Circuit and Protective Device Coordination Study, Arc Flash Analysis and Harmonic Analysis were conducted for the system.


Dell International Services India, Bangalore

Dell has a major data centre at ITPL, Whitefield, Bangalore known as Dell-8. Facility mainly receives the power at 11kV from nearby 66kV / 11kV, KPTCL , S/s. There is a nine storey building having AHU, Chiller, Lighting and Server Hub as major load. Load Flow Study, Short Circuit and Protective Device Coordination Study, Arc Flash Analysis were conducted. Arc Flash Labels were implemented at site and special staff awareness program on Arc Flash Hazard and Solutions was organized.


Johnson & Johnson, Aurangabad

Plant receives power at 33kV from nearby 132kV/33kV, MSEB S/s and have further distribution through 2 x 1500KVA, 33kV / 440V Distribution Transformers. Plan has all connected load at 440V. Load Flow Study, Short Circuit and Protective Device Coordination Study, Arc Flash Analysis were conducted.


Nestle, Samalkha Plant, Sonipat

Plant receives power at 33kV from nearby 132kV/33kV, State Utility S/s and have further distribution through 3 x 2000KVA, 33kV / 440V Distribution Transformers. Plan load is connected at 440V. Load Flow Study, Short Circuit and Protective Device Coordination Study, Arc Flash Analysis were conducted. Special staff awareness program on Arc Flash Hazard and Solutions was organized.

Schneider ElectricIndia Pvt. Ltd.

Ford India Pvt. Ltd, Sanand

A Giant of Automobile has a world class facility at Sanand, Gujarat. Plant receives power at 220kV from nearby GETCO S/s and plant had further distribution at 33kV through 2 x 220kV / 33kV Power Transformers. Load Flow Study, Short Circuit and Protective Device Coordination Study, Arc Flash Analysis were conducted for Engine Shop and DV5 facilities. Special staff awareness program on Arc Flash Hazard and Solutions was organized.

SRF Ltd, Dahej

Plant having in-plant generation capacity of 20MW (1x15MW + 1x5MW) and has main distribution at 11kV. All plant load has been connected at 440V. Further the GETCO grid power support at 66kV is proposed and shall be Hooked-up at 11kV with CPP Power. Load Flow Study, Short Circuit Analysis, Relay Coordination and Review of Generator Protection Setting and Logics has been conducted.

Grasim Industries Ltd, Nagda

A Viscose Staple Fibre Plant and Caustic Plant in Chemical Division having EC-2 30MW and EC-4 40MW STG in Energy Centre and 132kV Grid supply in Chemical Division for exporting power of 10MW for 10 days and normal running of plant for 20 days with generator in solo. Also the complete study of EC-4 40MW and EC-5 30MW running in parallel to cater the staple fiber division and conducted Load Flow, Short Circuit and Relay Co-ordination for this new operating philosophy.

Aditya Birla Chemicals (India) Ltd - Renukoot Chemical Division, Renukoot

New Project and Old Plant Electrical System

A Chemical project / plant having 132kV / 11kV grid supply through 25MVA / 31.5 MVA / 12.5 MVA power transformers and 2x25MW CPP running in parallel. The power system study conducted including switching stability of rectifier transformer, transient Stability and Grid Islanding study as well as Load Shedding logics for various outage conditions.

Aditya Birla Nuvo Ltd – Chemical Division, Patalganga

Existing Hi-tech Carbon plant having 100kV / 11kV grid supply through 15MVA power transformers and 1x15MW + 1x8MW CPP running in parallel was coming up with brown field project of Chemical Division. The power system study conducted including switching stability of rectifier transformer, transient Stability and Grid Islanding study as well as Load Shedding logics for various outage conditions.

P.T. Indo-Bharat Rayon, Indonesia

A Viscose staple fibre plant having grid supply through 70kV / 12kV, 15MVA power transformer and 2x10.8MW + 1x15MW CPP running in parallel. The study also includes transient stability and grid islanding as well as load shedding for various outage conditions. Also the restudy of system was done due to additional load and change in operating philosophy.

Oman Refinery and Petrochemicals Company L.L.C. – Sohar Refinery

A Refinery having 2x132kV / 33kV 75MVA Power Transformers as Grid support and 2x40MW STG and 2x20MW GTG. All six sources running in parallel and distributing the total 55MW load for various sub-stations at 33kV voltage level and other voltage levels are 6.6kV and 433V. The study includes Load Flow, Short Circuit, Motor Acceleration and Relay Co-ordination including submission of executive summary for enhanced and reliable operation of plant Electrical System.

Oman Polypropylene L.L.C. – Sohar Refinery

A Polypropylene plant receiving power from two feeders of ORPC – Sohar Refinery and the total 18MW load for Electrical Power Distribution at 33kV / 11kV / 6.6kV / 433V. The study includes Load Flow, Short Circuit, Motor Acceleration and Relay Co-ordination including submission of executive summary for enhanced and reliable operation of plant Electrical System.

Aromatics Oman L.L.C – Sohar Refinery

A Aromatics plant having 2x132kV / 33kV 75MVA Power Transformers as Grid support was initially design and plant commissioned. Subsequently due to merger of AOL plant with ORPC, two feeders from ORPC – Sohar Refinery brought to AOL plant to cater the total 35MW load for various sub-stations at 33kV voltage level and other voltage levels are 6.6kV and 433V. The study includes Load Flow, Short Circuit, Motor Acceleration and Relay Co-ordination including submission of executive summary for enhanced and reliable operation of plant Electrical System. The load shedding scheme for entire complex consisting of ORPC, OPP and AOL was also studied and implemented for various outage conditions.

8. Grasim Industries Limited - Chemical Division and Cellulosic Division, Vilayat

A complex having 66kV / 33kV state power grid support through 2x40MVA power transformers and 3x32MW CPP running in parallel. Viscose Staple Fibre Plant and Chemical plant are the major load centres in the complex. The power system study conducted for entire complex including switching stability of rectifier transformer, transient Stability and Grid Islanding study as well as Load Shedding logics for various outage conditions.

Indo Gulf Corporation Ltd, Jagdishpur

A Fertilizer plant having 132kV / 11kV, 2x25MVA power transformer and CPP having 2x22MW GTG running in iso mode. The study was conducted for system reliability including replacement of existing electro mechanical relays into numerical protection relays for plant distribution sub-station and also generators as a part of major solution.

Birla Cellulosic, Kosamba (A Unit Of Grasim Industries Ltd)

A Viscose staple fibre plant having 22kV / 6.6kV, 2.5MVA and 2x15MW CPP running in island mode and grid supply as standby for start up. The second stage study is for adding one more TG set of 12MW capacity. The third restudy of system was done due to additional load of 2TPD plant and change in operating philosophy.

Rajashree Polyfils, Umalla unit of Century Enka Group of Company

A Poly Fibre plant having 132kV / 11kV grid support through 2x20/25MVA power transformers and CPP having 1x4.3MW GTG and 1x4.1MW HFO running in parallel. The study was conducted for system reliability including addition of Distance Protection Schemes and Grid Islanding relays.

Nirma Ltd – Bhavnagar

A Caustic Soda Plant having 66kV, 15MVA Power Transformer and CPP having power generation capacity with 2x16.32MW TOYO DENKI TG sets, 1x6.5MW BHEL make TG set and 1x23MW TG set of China make running in parallel to cater the plant load and exporting approximately 10MW power to grid and its auxiliaries. The study also includes transient stability and PLC based load shedding schemes

Harmonic Measurement Study at 22 locations of Electrical Network using LMG500 Precision Power Analyzer. The Voltage and Current wave foams have been analyzed upto 25th Harmonic by Fast Fourier Transformation (FFT) Algorithm.

Chambal Fertilizers and Chemicals Ltd, Kota

A Fertilizer Plant having 2x22.4MW GTG and a Grid support of 132kV / 11kV, 15/20MVA and Allied Distribution System of entire plant having Voltage Level 11kV / 3.3kV / 0.433kV for Gadapan-1 and 2 units

Ministry of Defence (MOD) through Nafal Contracting LLC, Oman

The concept design and power and protection system study conducted for converting existing 33kV outdoor switchyard into indoor sub-station by providing 33kV / 11kV 20MVA transformers to run in parallel with 2x12MW GTG set at Wudam base and 33kV / 11kV 20MVA transformers to run in parallel with 4x4MW GTG set at Shafa Izki base. The system was protected for both import and export of surplus power to National Grid.

Alstom Projects India Limited – Kolkata / Vadodara

Feasibility study report for Reliability of existing generator protections relays of 34.5MW GTG installed at Bhola, Bangladesh running in parallel with 11/33kV 2x25MVA power transformer for power evacuation to National Grid of Bangladesh

Welspun India Ltd, Vapi

A terry towel and rugs manufacturing plant having 66kV / 11kV power export system design for 12/15MW having 15000/20000 KVA capacity includes 11kV switchgears and Grid Islanding Scheme. The exclusive export is by DG sets of rating 2.14MW, 4.206MW and 6.2MW and Plant load catered by one GTG rated 7.52MW and one GEG rated at 6.945MW

Gujarat Heavy Chemicals Ltd, Sutrapada

A Caustic soda plant having 1x5MVA, 66kV power and 2x11MW + 1X6MW CPP

Search Chem Industries Ltd – Jhagadia

A Chemical Plant having 66kV / 11kV, 3x20MVA and 1x41.9MW, 1x26.18MW CPP running parallel with grid and also having system to export 10 MW Power and balance for the plant load including load shedding schemes on PLC basis. Power plant isolated during cascade tripping of Grid supply in Gujarat in the year 1996.

GAIL (India) Ltd, Guna

A LPG Plant having 132kV / 6.6kV, 2x10/12.5MVA Power Transformer, 2x2.7MW GTG and Allied system at 6.6kV and 433V

Hindalco Industries Ltd, Muri Plant, Ranchi

A Aluminium Powder manufacturing plant having 2x15MW STG at 11kV and entire plant distribution system at 11kV / 6.6kV / 433V. the study of Load Flow and Short Circuit conducted for two generators running in parallel. Subsequently the Short Circuit study for Grid support at twin feeders of 132kV / 11kV, 20MVA Transformers running for various combinations conducted to decide the MVA rating for new switchgears and equipment and also to authenticate the MVA rating of existing switchgears.

Indian Rayon Industries Ltd, Veraval

A Rayon plant having 11kV 2x3MVA, 2x16MW and 8x2MW CPP Both TG running in parallel and meeting caustic plant load requirement and 8x2MW DG sets feeding the critical Rayon plant

Alstom Projects India Limited – Kolkata / Vadodara

Feasibility study report for Reliability of existing generator protections relays of 20MW GTG installed at Sylhet, Saidpur and Rangpur Bangladesh running in parallel with 11/33kV 1x25MVA power transformer for power evacuation to National Grid of Bangladesh

Nandan Exim Ltd, Ahmedabad

A fibre plant having 33kV, 2x12.5MVA Grid support and 1x30MW CPP running in parallel with grid supply which was having frequent black outs and solution provided

Alembic Ltd, Vadodara

A Penicillin company having 66kV / 11kV 15MVA and 3x4.2MW CPP running in parallel with grid to cater plant load and grid supply as standby

Vikram Ispat Ltd, Revadanda

A Steel Ingot plant having 1x8.7MW and 4x2.5MW CPP running independently and feeding the plant load

Thermax Ltd, Pune

Feasibility study report for Reliability of existing generator protections relays including frequent tripping and mal operation of 1x30MW STG and 2x25MW STG installed at SKS Ispat Ltd, Raipur running in parallel with 11/132kV 1x31.5MVA and 2x20/25MVA power transformer for power evacuation and export to State Grid of Chhattishgarh. Also conducted detail system study after submission of FSR.

Arvind Mill, Sanand

A Denim Cotton Mill unit having 3x10MW GTG and 1x4MW GE running in iso mode as well as running in parallel with grid having 66/11kV 3x15/20MVA Power Transformers.

Enercon India Ltd / Larsen & Toubro Ltd, ECC, Ahmedabad

132kV / 33kV, 2x75MVA Outdoor switchyard at Jaisalmer - System configuration – main and transfer bus for Wind Power Generation and Evacuation. The study conducted for complete protection requirement including unit protections.

Suzlon Energy Ltd / Larsen & Toubro Ltd, ECC, Ahmedabad

220kV / 33kV, 2x75MVA Outdoor switchyard at Jaisalmer - System configuration- double main and transfer bus for Wind Power Generation and Evacuation. The study conducted for complete protection requirement including unit protections.

Thermax Ltd, Pune

Feasibility study report for Reliability of existing generator protections relays including frequent tripping and mal operation of 2x30MW STG installed at Kamachi Sponge & Power Corporation Ltd., Chennai running in parallel with 11/132kV 2x40MVA power transformer for power evacuation and export to State Grid of Tamil Nadu and also meeting in house requirement of power for various plants

Sanghi Industries Ltd, Cement Division, Sanghipuram

A Cement plant having 4x11.3MW CPP three of them running in parallel meeting total plant load requirement of 33.9MW and fourth unit as standby

Gujarat Electricity Board / Larsen & Toubro Ltd, ECC, Ahmedabad

220KV / 66kV 3x100MVA Outdoor switchyard at Utran Power Plant of GEB, Surat - System configuration- double main bus on 220kV and 66KV. Integration of the new bay in the existing system on 220kV side shifting of the existing 220kV bay to a new bay location. Conversion of the existing single bus bays into double bus system on the 66KV level. Integration of the existing 66KV bays into the new 66KV system. The study conducted for complete protection requirement including unit protections.

Suzlon Energy Ltd, Pune

66kV / 33kV, 2x20MVA and 2x37.5MVA Outdoor switchyards at three different locations of Wind Farms at Erkunahalli, Hariharpura, Nittur, Karnataka State - System configuration- single bus system for all substations for Wind Power Generation and Evacuation. The study conducted for complete protection requirement including unit protections.

Gujarat Water Infrastructure Limited, Gandhinagar

Drinking Water Supply Scheme for Client GWSSB (66kV / 11kV / 6.6KV / 3.3kV / 433V – 12.5 / 10 / 6 / 5MVA Power Transformer System). The study conducted for complete protection requirement including unit protections for all fourteen locations as under.

  • NC – 1 Gadhada PS
  • NC – 2 Chavand PS
  • NC – 3 Babra PS
  • NC – 4 Vallabhipur PS
  • NC – 6 Maliya – Morvi PS
  • NC – 7 Morvi – Tankara PS
  • NC – 9 Maliya – Bhachau PS
  • NC – 12A, 12B Tankara – Rajkot PS
  • NC – 14 Gandhinagar PS
  • NC – 16 Mehasana PS
  • NC – 17 Modhera PS
  • NC – 20 Godhara PS

Gujarat Water Resources And Development Corporation Limited

66kV / 6.6KV / 433V – 12.5 / 10 / 6 / 5MVA Power Transformer System. The study conducted for complete protection requirement including unit protections for all locations as under.

  • Khorsam-Saraswati Lift Irrigation Project
  • Modhera-Dharoi Lift Irrigation Project
  • Modhera To Sujlam Suflam Spreading Canal Lift Irrigation Project
  • Jalundra To Sujlam Suflam Spreading Canal Lift Irrigation Project
  • Khorsam To Sujlam Suflam Spreading Canal Lift Irrigation Project
  • Adundra To Sujlam Suflam Spreading Canal Lift Irrigation Project

Suzlon Energy Ltd, Pune

220kV / 33kV, 4x100MVA Outdoor switchyard at four different locations of Wind Farms at Jamde, Valve, Suthri, Sangli in Maharashtra State - System configuration: 220kV double main and transfer bus and 33kV main and transfer bus for Wind Power Generation and Evacuation. The study conducted for complete protection requirement including unit protections.

Narmada Water Resources And Water Supply (Nwrws)

66kV / 6.6KV / 433V – 12.5 / 10 / 6 / 5MVA Power Transformer System. The study conducted for complete protection requirement including unit protections for all locations as under.

  • Piyaj-Dharoi Line-1 Lift Irrigation Project:
  • Hathmati-Guhai Lift Irrigation Project:

Hindustan Construction Company Ltd (Hcc) Mumbai

66kV / 6.6KV / 433V – 12.5 / 10 / 6 / 5MVA Power Transformer System. The study conducted for complete protection requirement including unit protections for Piyaj-Dharoi Line-2 Lift Irrigation Project

Remi Metals Ltd, Jhagadia

A Metal plant having 220kV / 33kV / 11kV 42MVA and 25MVA power transformers for Induction Furnaces

Thermax Ltd, Pune

Feasibility study report for Reliability of existing generator protections relays including frequent tripping and mal operation of 1x30MW STG installed at Bengal Energy Ltd, Kharagpur, West Bengal running in parallel with 11/132kV 1x40MVA power transformer for power evacuation and export to State Grid of West Bengal and also meeting in house requirement of power for various plants

Tata Chemicals Ltd, Babrala

A Fertilizer plant having 2x20 MW CPP and allied 11kV / 3.3kV / 433V Power Distribution System

Orient Abrasives Ltd, Porbandar

A Chemical Plant having 11kV 2x3MVA Power Transformer and 2x4.2MW CPP

Wockhardt Ltd, Ankleshwar

A Bulk Drug Plant having 22kV / 433V 2x2MVA Power Transformer and 4x1MW CPP

Rathi Ispat Ltd, Ghaziabad

A Steel and Rolling Plant having Switchyard of 132kV / 11kV, 2x25MVA Power Transformer and allied system at 11kV and 433V Power Distribution

United Phosphorus Ltd, Unit – I, Ankleshwar

A Phosphorus Plant having Switchyard of 66kV / 22kV, 1x15MVA, Power Transformer and 22kV / 433V, 2x2.5MVA Distribution Transformer and allied system at 433V Power Distribution

Gujarat Guardian Ltd, Ankleshwar

A Glass manufacturing company having 132kV / 11kV, 2x10MVA Power Transformer and Allied system

Shree Digvijay Cement Co. Ltd, Jamnagar

A Cement Plant having 3 x 6.370MW CPP running in parallel and catering the plant load including load sharing and shedding scheme

Indian Farmers Fertilisers Co-Operative Ltd – Kalol Unit

A Fertiliser plant having 66kV / 11kV 2x10MVA and 1x8MVA Power Transformer and 11kV, 3.3KV and 415V Electrical Power Distribution System

Petrofils Co-operative Ltd, Valia

A fibre manufacturing company having 132kV / 11kV, 2x15MVA Power Transformer and Allied system at 11kV / 3.3kV and 433V system

Godrej Industries Ltd, Valia

A Chemical plant having 1x10MVA, 66kV power and 2x3MW CPP

Nova Petrochemical Ltd, Ahmedabad

A Petrochemical plant having 1x7.5MW and 8x1MW CPP

Modern Petrofils Ltd, Vadodara

A fibre plant having 132kV / 6.6kV, 2x20MVA Grid support and 5x1.18MW CPP running in parallel with grid supply and Power plant isolated during cascade tripping of Grid supply in Gujarat in the year 1996

Saurashtra Cement Ltd, Porbandar

A Cement plant having 132kV / 33kV, 2x20MVA and 2x7.2MW CPP

Vardhman Acrylics Ltd, Jhaghadia

A Fibre plant having 1x5.5MW and 6x1MW CPP

Garden Silk Mills Ltd, Surat

A Silk Mill having 66kV / 11kV, 3x5 MVA and 3x3.2 MW CPP running in island mode



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