UDHAYAKUMAR SUBBURAYAN

Solar,Wind,Bess and Overall Renewable project upto the capacity of 1GW Power Plant.

• Prepares Single Line Diagrams (SLDs), cable routing, earthing (grounding) designs, and lightning protection systems.
• Authored and approved Single Line Diagrams (SLDs) and Key Electrical Layouts for substations up to [400kV] adhering to [IEC/IEEE/CEA] standards.
• Design earthing, lightning protection, and protection systems.
• Sizes string configurations, selects inverters and battery storage, and calculates DC-to-AC conversion layouts.
• Perform cable sizing, voltage-drop, short-circuit, and load calculations.
• Select/specify transformers, switchgear, cables, CT/PT, and other equipment.
• Ensure compliance with IEC/IS standards and grid requirements.
• Reviewed electrical systems for wind turbines to ensure compliance with grid standards.
• Conducted design reviews for Air Insulated Substations (AIS) to support project management activities.
• Conducted design reviews for secondary engineering and protection systems, aiding project management activities.
• Lightning Protection: Engineered Direct Stroke Lightning Protection (DSLP) using Rolling Sphere and Fixed Angle methods.
• Earthing Systems: Designed Earth Mats and calculated Step/Touch voltages using SESAM/ETAP to ensure safety compliance.
• Transmission Line (TL) Engineering - Design Review, Support for PMC Activity.
• Solar and Wind Power Plant - Design Review, Support for PMC Activity. up to 1GW to 2GW capacity.
• Designed ground-mounted PV arrays using CAD tools (AutoCAD, PVsyst, Helioscope) to maximise kilowatt-hour (kWh) yield and optimise module density.
• Tower Spotting: Optimised tower locations, weight spans, and uplift limits using PLS-CADD software.
• Sag & Tension: Generated precise Sag and Tension charts for varying climatic conditions to guarantee statutory ground clearances.
• Insulation Design: Calculated creepage distances and specified insulator strings based on site pollution levels.
• Crossing Clearances: Secured technical approvals for critical crossings, including National Highways, Railways, and Rivers.
• Configured protection schemes with Main-I and Main-II redundancy, including Line Current Differential (87L) and Distance (21) protections.
• Transformer Safety: Implemented Differential (87T), Restricted Earth Fault (64R), and mechanical trip logics.
• Interlock Logic: Designed control schematic drawings and interlocking logic to prevent unsafe isolator operations under load.
• Automation Interface: Integrated Substation Automation Systems (SAS) based on IEC 61850 protocols.
• Equipment Sizing: Performed sizing calculations for major equipment including Power Transformers, CTs, VTs, and Surge Arresters.
• Review vendor drawings, technical specifications, BOQs, and MTOs.
• Key Technical Skills (For your Skills Sidebar)
• Software: ETAP, AutoCAD, PVsyst.
• Standards: IEEE 80, IEEE 998, IEC 60071 (Insulation Coordination), CEA Guidelines.

Solar,Wind,Bess and Overall Renewable project upto the capacity of 1GW Power Plant.

• Project Management & Documentation – BESS Project – 200MWh
• Oversaw overall project responsibilities including management and documentation.(PCP,PEP & BBU,MDL)
• Progress Monitoring: Provide Monthly Progress Reports (MPR) to track engineering milestones and ensure adherence to schedules.
• Ess, Renewables - Detailed Engineering– BESS Project – 200MWh
• Optimised BESS using reliability degradation models and SoC parameters to enhance lifecycle value.
• Core Infrastructure: Assess specifications for Bidirectional Inverters, Transformers, and Switchgear.
• Validated designs against project requirements and specifications.
• Created detailed plant layouts, MCR designs, and cable routing; developed earthing and lightning protection systems while integrating EMS and SCADA to improve system performance.
• Substation Design (AIS) – Design Review(Solar and Wind Power Plant - Design Review, Support for PMC Activity. upto 1GW to 2GW capacity.
• Single Line Diagrams: Authored and approved SLDs and Key Electrical Layouts for substations up to [400kV] using [IEC/IEEE/CEA] standards.
• Equipment Sizing: Performed sizing calculations for major equipment including Power Transformers, CTs, VTs, and Surge Arresters.
• Earthing Systems: Designed Earth Mats and calculated Step/Touch voltages using SESAM/ETAP to ensure safety compliance.
• Lightning Protection: Engineered Direct Stroke Lightning Protection (DSLP) using Rolling Sphere and Fixed Angle methods.
• Clearance Verification: Enforced strict Phase-to-Phase and Phase-to-Earth safety clearances for Air Insulated Switchgear (AIS) layouts.
• Review and Prepare Letter of Intent LOA with internal Stake holder.
• Coordination Plan (PCP) and Project Execution Plan (PEP) to align stakeholders and timelines.
• Oversaw Master Document List (MDL) and defined Billing Breakup (BBU) to streamline commercial clearance processes.

• Designed electrical systems for retrofit projects under marine standards like SOLAS, IEC, DNV, ABS, and IMO.
• Developed control logic for load balancing, synchronisation, and winch operation; coordinated ECU and DG management.
• Performed load analysis, supported vendor TBE, prepared MTO documents, and allocated man-hours.
• Produced feasibility reports and maintained BOMs, meeting class requirements and regulatory compliance.

Oversee BBCL 150tpd CNG bio-gas plant systems and daily field operations.

• Manage HT/LT substation connectivity, step-down transformers, and HT/LT switchgear.
• Operate automatic power factor correction panels and power control centres for stability.
• Manage motor control centres, variable frequency drives, and soft starters.
• Maintain diesel generator synchronisation panels, UPS systems, and battery banks.
• Develop PLC and SCADA logic for temperature and gas upgrading control.
• Maintain PSA or membrane electronics, moisture scrubbers, and CBG compressor panels.
• Calibrate online gas quality analysers for CH4, CO2, H2S, O2, and dew point.
• Install and calibrate pressure transmitters, level sensors, and coriolis or thermal meters.
• Maintain LEL methane detectors, toxic H2S sensors, and ESD interlocks.
• Enforce lockout/tagout procedures, electrical work permits, and inspectorate audits.

Design & Detailed Engineering

• Power System Studies: Load flow, maximum demand, short-circuit, arc-flash, transient stability, earthing, and lightning studies using ETAP.
• Equipment & Cable Sizing: Transformers, DGs, MCCs, motors, UPS/batteries, HT/LT cables, control, instrumentation, and communication cables.
• Detailed Engineering: Preparation of SLDs, cable schedules, interconnection diagrams, layouts, earthing/lightning systems, lighting, and cable-tray routing using AutoCAD/DIALux.
• Instrumentation & Automation: Instrument indexes, I/O lists, JB schedules, P&ID reviews, PLC/SCADA integration, and control system engineering.
• Project & Vendor Management: RFQs, technical bid evaluations (TBE), vendor document/datasheet reviews, FAT witnessing, MTO/BOM, and man-hour estimation.

• Electrical & Power Engineering: Design and sizing of 11/33/110 kV and LT systems as per IEC, IS, IEEE, NEC, and applicable standards.
• Power System Studies: Load flow, maximum demand, short-circuit, arc-flash, transient stability, earthing, and lightning studies using ETAP.
• Equipment & Cable Sizing: Transformers, DGs, MCCs, motors, UPS/batteries, HT/LT cables, control, instrumentation, and communication cables.
• Detailed Engineering: Preparation of SLDs, cable schedules, interconnection diagrams, layouts, earthing/lightning systems, lighting, and cable-tray routing using AutoCAD/DIALux.
• Instrumentation & Automation: Instrument indexes, I/O lists, JB schedules, P&ID reviews, PLC/SCADA integration, and control system engineering.
• Project & Vendor Management: RFQs, technical bid evaluations (TBE), vendor document/datasheet reviews, FAT witnessing, MTO/BOM, and man-hour estimation.
• Marine Engineering - Basic & Detailed Engineering
• Marine Systems Design: Create electrical systems for retrofit projects adhering to marine standards (SOLAS, IEC, DNV, ABS, IMO).
• Control Logic & Integration: Develop control architecture for load balancing, synchronization, and winch control; oversee ECU and DG management.
• Technical Management: Conduct load analysis, vendor TBE, MTO preparation, and allocate man-hours.
• Documentation & Compliance: Write feasibility reports, BOMs, and ensure design meets class and regulatory requirements.
• Electrical Design Engineer – Solar PV Plant and Floating Solar
• Design DC and AC electrical systems for solar PV plants.
• Prepare SLDs, cable schedules, and electrical layouts.
• Perform cable sizing, voltage-drop, short-circuit, and load calculations.
• Design earthing, lightning protection, and electrical protection systems.
• Select/specify inverters, transformers, switchgear, cables, and other equipment.
• Ensure compliance with IEC/IS standards and grid requirements.
• Review vendor drawings, technical specifications, BOQs, and MTOs.

• Prepare HT/LT electrical system designs for industrial plants, substations, commercial, and infrastructure projects.
• Develop Single Line Diagrams (SLD), Internal General Arrangement (IGA), Overall General Arrangement (OGA), cable routing, and electrical layout drawings.
• Design power and control wiring schemes for various electrical panels and switchgear systems.
• Experience in 33kV/11kV Switchgear, MV/LV Switchgear (6.6kV, 3.3kV, 415V), C&R Panels, LT PCC, PMCC, AMF, DG Synchronizing Panels, Main LT Panels, APFC Panels, PLC-cum-Starter Panels, Metering Panels, Lighting Distribution Boards (DBs), and Bus Duct systems.
• Ensure compliance with IEC 61439, IS, IEC, IEEE, and customer specifications.
• Perform load calculations, cable sizing, voltage drop analysis, short-circuit studies, protection coordination, earthing, and lightning protection design.
• Prepare RFQ/BOQ, technical specifications, and material requisitions as per project and customer requirements.
• Select and size critical electrical components including:
• ACBs, MCCBs, MCBs
• Contactors and Motor Starters
• Protection Relays
• CTs & PTs
• Busbars and associated accessories
• UPS & Battery Systems
• Review vendor drawings and provide technical evaluation of equipment and offers.
• Coordinate with civil, mechanical, instrumentation, and automation teams for seamless project execution.
• Support installation, testing, commissioning, and troubleshooting of electrical systems.
• Collaborate with project execution teams for successful integration of IMCC, PLC/SCADA Systems, UPS, Battery Systems, HVAC Interfaces, and Utility Systems.
• Prepare as-built drawings, operation manuals, and final project documentation.

• Responsibilities:
• Testing and researching power product materials with standard equipment.
• Assisting in the maintenance of a 7×210MW Steam 210MW Turbo Generator, 240MVA Power Transformer, and 230/400KV Switchyard & Substation.
• Coordinating troubleshooting for AVR, DG, and auxiliary motors.
• Testing Transformer oil, HT/LT Breakers, and Panel boards.
• Collaborating with the Shift Engineer during overhauls and maintenance of electrical equipment.
• Maintaining daily operation records of DG and calculating running hours based on tariff.
• Providing technical support in Electrical & Electronic Engineering at the Centre for Applied Research and Development.