- T & D Power Projects
- ERS
- Power Substation
- Underground Cabling Systems
- Software Tools
T & D Power Projects
Enfras provides complete & tailored/customized engineering solutions for Transmission and Distribution lines, be it new or modifications on existing lines, combination of OHL with UGC, T-Off Spur lines for Oil field facilities. Capable of designing self-supporting steel towers, guyed towers, wood pole structures, monopoles etc for lines ranging from lowest distribution up to 400 kV lines. Some of the important activities to highlight are:
- Feasibility study and investigation to select optimum and best available route.
- Design Criteria including Sag-Tension Calculations, optimized towers geometry, clearance calculations and drawings.
- Terrain Modelling, Generating Ground line profiles and Towers Spotting.
- Analysis and Design of OHL supports be it lattice towers, guyed tower or wood pole structures and suitable foundations design, Guy Anchors design, Gantries.
- Stability checking of existing towers for altered loadings and conversion one type of tower to another type with suitable modifications.
- OHL to UGC Transition Stations with Sealing End Compounds/fenced enclosures.
- Other allied services related to OHL includes
- Line parameter calculations
- Insulation co-ordination & other system studies
- Short circuit load calculations
- Electromagnetic interference study
- Thermal imaging to assess corona impact
- Spatial data
Emergency Restoration Systems (ERS)
Emergency Restoration System (ERS) is a temporary overhead line to bypass certain length of an extent (existing) line in the event of an emergency.
Transmission lines are vulnerable to failure, causes of failure of being either natural calamity beyond the control of mankind (or) acts controllable by mankind including accidental damages. Failures of critical transmission lines were common in many countries and such failures not only resulted in huge financial losses to utility but also adversely affected political dimensions. Thus, a basic temporary system was conceived, designed and used to meet such situations.
It has become utilities (or) the grid (power system) owners be prepared to address such exigencies/emergencies. However primary concern and consideration were restoration time required for restoration of parent line and found although inherited with limitations ERS helped to minimize economic losses and socio-political implications. When time using ERS was compared with restoration of parent line substantial benefits were found.
ERS prioritizes rapid restoration and flexibility over optimization. It supports various line voltages without separate inventories and can be deployed in rugged, remote areas without heavy equipment. Though temporary, some installations last years, often complemented by wood pole structures. Design relaxations allow easier handling, making expert input essential for proper application.
Situations demanding ERS
- When a transmission line fails due to natural calamity, vandalism, system failure, over loading, faulty design, material, workmanship, poor or no maintenance, incorrect operation and accidental damage.
- To undertake repair, maintenance of a line
- To carry out modifications in existing line extensions, addition & integration, system improvement / reliability
- To reroute, relocate the line or part of line
- To increase (raise) existing overhead cables (conductors), above roads, rail lines, navigation canals / rivers and many more
- To up rate line voltage; insulation, better substitute
- To carry out the reconductoring to achieve higher transmission capacity
- To add additional features on existing transmission lines
Power Substation
Enfras provides complete and customized engineering solutions for power substations, covering new installations, upgrades, and modifications. Our expertise spans from low-voltage distribution substations to high-voltage (400 kV) transmission substations, ensuring reliable and efficient power delivery. Key activities include:
- Site Feasibility & Layout Planning
Conducting feasibility studies, selecting optimal locations, and designing efficient substation layouts. - Electrical System Design
Engineering busbar arrangements, switchgear configurations, and protection schemes for HV and MV substations. - Primary & Secondary Equipment Selection
Specification and integration of transformers, circuit breakers, disconnectors, and protection relays. - Grid Integration & System Studies
Load flow analysis, short circuit studies, insulation coordination, earthing system design, and reactive power compensation. - Structural & Civil Engineering
Design of gantries, equipment foundations, and cable trenches. - Grounding & Earthing Design
Designing comprehensive earthing systems to meet safety and performance standards, including fault protection and grid integration. - Lightning Protection Design
Specifying lightning protection systems, including surge arresters and grounding techniques, to safeguard substation equipment from electrical surges.
Underground Cabling Systems
Enfras offers comprehensive and tailored engineering solutions for underground power cable installations, covering new projects, upgrades, and modifications. Our expertise extends across medium to high voltage (up to 400 kV) underground cable systems, ensuring safe, efficient, and reliable power transmission. Key activities include:
- Feasibility Study & Route Optimization
Conducting detailed studies to select the optimal cable route, considering factors such as environmental impact, soil conditions, and accessibility. - Cable System Design
Engineering the layout, voltage drop calculations, and load distribution to ensure optimal cable performance. - Cable Sizing & Specification
Selecting appropriate cable types and sizes (e.g., XLPE, PILC) based on voltage ratings, current capacity, and environmental factors. - Electrical Design & Calculations
Performing detailed electrical design, including fault current calculations, short circuit analysis, and load flow studies for the underground cable system. - Cable Protection Design
Designing protection systems to prevent damage, including fault detection mechanisms, protection relays, and earthing systems. - Trenching & Ducting Design
Developing trenching and ducting designs that meet industry standards while considering factors like ground conditions, load-bearing capacity, and thermal dissipation. - Jointing & Termination Design
Specifying designs for cable joints, terminations, and sealing ends, ensuring reliable and secure connections. - Civil Design for Cable Infrastructure
Designing cable chambers, manholes, splice vaults, and other civil works needed for the proper installation and maintenance of the underground system. - Earthing & Grounding System Design
Developing comprehensive earthing systems for the underground cable network to ensure safety and compliance with standards. - Integration with Existing Systems
Coordinating designs with overhead lines, substations, and other network components for seamless integration and system operation. - System Studies & Simulations
Conducting system studies such as insulation coordination, electromagnetic field analysis, and fault analysis to ensure the system meets performance and safety standards.
Software Tools
Enfras utilizes a wide range of advanced software tools to deliver high-quality engineering solutions for power transmission, distribution, and substation projects. Our expertise spans across several platforms, including
- PLS CADD
- PLS TOWER
- PLS POLE STEEL, WOOD, LW MAST
- AutoCAD
- Microstation
- MS Project
- Primavera
- ASPEN
- ETAP
- STAAD Pro
- TEKLA
- BOCAD
