Ghods Niroo Engineering Company provides a complete range of technical and economic services to power industry. Power Generation department with effective combination of corporate consultancy delivers technical plans and provides engineering consultancy services for demanding and complex infrastructure projects.

DISTRIBUTION NETWORKS ENGINEERING UNIT

Power distribution group has performed a wide range of activities in the field of design and improvement of the distribution networks which can be very effective in reducing the electric losses and energy costs.

All design activities and system studies in this section are performed by soft-ware packages developed by this department for Ministry of Energy of Iran. This package, named MODEC, includes a data base and the following application programs:

• Load balancing
• Maintenance scheduling
• Optimum service restoration
• Fault analysis
• Load modeling
• Insulation coordination
• Optimum comprehensive planning
• Reliability studies
• Short circuit studies
• Load flow studies
• Voltage flicker control
• Optimum capacity allocation
• New customer acceptance
• Optimum lighting design

Ghods Niroo Engineering Company provides a complete range of technical and economic services to power industry. Power Generation department with effective combination of corporate consultancy delivers technical plans and provides engineering consultancy services for demanding and complex infrastructure projects.

SYSTEM STUDIES ENGINEERING UNIT

System studies group, at GNEC, established in 2003, has the main job of conducting network studies, according to the requirements of electric companies and other industrial organizations.

Outcome of the most projects consists of adding new transmission lines, substations or power plants to the system. Therefore, the new configuration of network shall be considered by performing the following studies:

• load flow studies
• short circuit studies
• transient stability analysis

For above mentioned works, some scenarios are defined and after performing the studies, the best plans will be investigated by considering economical aspects of project. In case of need to modify network, to achieve Loss reduction and/or short circuit level reduction, it can be done by utilizing professional softwares. The softwares used in system studies group includes but is not limited to PSS/E, Dig SILENT, ETAP and Cyme. To sum up the above, the main activities of system studies group in GNEC are:

Studies to connect power plants, substations and/or transmission lines to existing networks Loss reduction Studies

Short circuit level reduction calculation

Placement, sizing and connection studies for DGs

Industrial plants studies and determination of weak points of the network and technical suggestions as well.

For Industrial projects, all required studies and calculations are performed in the following areas:

• Load Flow Calculations
• Short Circuit analysis
• Motor Starting
• Transient Modes
• Harmonics studies and reduction
• Protection Coordination
• Reliability Calculations