Nissi Engineering Solution Pvt. Ltd.

Ambattur, Chennai, Tamil Nadu

Substation electrical design and engineering are critical components in the development of reliable and efficient electrical infrastructure. This process begins with electrical design, which involves creating detailed schematics for power distribution, protection systems, and control circuitry. Engineers consider factors such as load requirements, voltage levels, and safety standards to ensure the system meets operational needs.

Ultimately, comprehensive electrical engineering ensures that substations operate efficiently, support grid stability, and meet the growing demands of modern energy systems Primary & Secondary engineering documents of T&D sub-stations upto 765kV, LT sub-stations & Power plants (EBOP).

Activities Involved using E tap :

Load Flow (Power Flow) Analysis is a fundamental study in power system engineering used to determine the voltage, current, active power, and reactive power in an electrical network and different segment in the power system under steady-state conditions. It helps in optimizing system performance, ensuring stability, and planning future expansions.

Short circuit analysis is a crucial study in power system engineering used to determine the fault currents and system response under abnormal conditions, such as line-to-line or line-to-ground faults.

Relay coordination is the process of setting protective relays in a power system to ensure selective, reliable, and fast fault isolation while minimizing unnecessary power outages. It ensures that the closest relay to the fault operates first, while upstream relays act as backups.

Harmonics

A Harmonics Study analyzes the presence of harmonic distortions in a power system caused by nonlinear loads. Harmonic currents and voltages can lead to equipment overheating, malfunctioning, and reduced system efficiency.

Recommend harmonic mitigation solutions like filters and reactor tuning

Power Factor (PF) Mitigation

Power Factor (PF) mitigation involves improving the power factor in electrical systems to reduce energy losses, improve voltage stability, and avoid penalties from utility providers.

Arc flash study:

An Arc Flash Study is a critical safety analysis conducted to assess the risk of arc flash hazards in electrical systems. It helps in identifying potential incident energy levels and determining the necessary personal protective equipment (PPE) and mitigation measures.

Engineering Documents we do:

Design calculations of CT & PT

Relay setting calculation

Power Transformer & Cable Sizing

Cable tray layouts

Equipment layouts

Earthing layouts

Lighting layouts and Cable schedules

EBOP cable schedule for DCS, ECP, MV & LV Switchgear and other panels

Foundation & Structural design of control room, HT equipments at Switchyard

ARC flash study

Harmonics study

Substation Automation Systems (SAS) play a key role in modernizing power distribution by improving efficiency and reliability. They allow remote monitoring and control, enabling operators to manage substations from centralized control rooms.

By automating switching operations, fault detection, and load management, SAS reduces manual work and improves response time. Real-time data collection from relays and transformers helps in accurate monitoring, analysis, and decision-making.

SAS uses standard communication protocols to ensure smooth data exchange and seamless integration of different equipment. It also enhances system protection and cybersecurity, ensuring reliable and secure operations.

Our SAS department is a key division within our organization, playing a crucial role in delivering advanced substation automation solutions , with a team of 150+ experts handling everything from basic services to complex integrations. We specialize in third-party integration, seamlessly working with any make or type of IEDs across major SAS systems available in the market.

Activities Involved:

Design of System Architecture Hardware & Software 

Recommendations Supply of hardware & software requirements

Database creation Ethernet switch configuration 

Commissioning of BCU, BCPU and PMU IED, Energy Meter & GPS 

Integration HMI & Gateway configuration Communication 

Establishment with control center Web hosting and FTP 

Configuration Controllers communication through OPC protocol 

construction SAT-Point to Point Testing

Customized Solutions:

Commissioning of SAS in fresh Sub-stations 

Commissioning of SAS in conventional sub-stations 

SAS Upgradation Integration of other make IED in existing SAS Integration of different SAS