Transmission Directorate is responsible for development, implementation and operation of high voltage transmission system.
This business group is headed by a Deputy Managing Director and has Grid Operation Department (GOD), System Operation Department (SOD), Grid Development Department, each headed by a Director. This business group monitors, operates and constructs transmission lines and substation facilities to evacuate power generated by both NEA and IPP owned power plants and undertakes reinforcement of the existing transmission system. Nepal’s fi rst-ever 400kV Nepal-India cross-border transmission link is completed with the leading involvement of this business group. Currently this line has been charged at 132kV voltage level and importing 80MW of power. In order to develop strong Transmission Network the Hetauda-Dhalkebar-Inaruwa 400kV transmission line, is under construction.
Transmission Directorate has prepared Transmission System Master Plan for 2015 to
2035 upon which NEA intends to develop river basin wise transmission system as a long term strategy for power development of Nepal.
GRID OPERATION DEPARTMENT
The Grid Operation Department (GOD) has the main responsibility of transmitting reliable and quality power from distant generators to various load centers. The Department also provides connection facilities to IPPs and Bulk Consumers at different voltage levels by accomplishing Connection Agreement as per NEA Grid Code.
The other major responsibility of this Department is to look after the operation of 66kV & above Substations and Transmission Lines along with routine and breakdown maintenance works including up-gradation, extension, replacement works, reactive compensation, rehabilitation works etc. The three division offi ces in Kathmandu, Hetauda, Butwal and three branch offices in Duhabi, Pokhara & Attaria are working under GOD for the fulfi llment of these responsibilities.
System Operation department (SOD)
As in the preceding year, Load Dispatch Centre has been working round the clock to keep the operation of the Integrated Nepal Power System (INPS) on the right track through the use of computer based Supervisory Control and Data Acquisition (SCADA) system.
The availability of real time data and better communication system have improved the overall availability of power stations and transmission lines and has helped towards fast restoration of the power system in case of black-outs, thereby reducing loss of revenue. The number of complete system collapse has been reduced to 26 as compared to 28 in the previous year, and the subsequent complete outage time has been reduced to 430 minutes as compared to 1053 minutes (465 minutes during earthquake) in the previous year. The magnitude of load shedding has also been maintained to maximum 91 hours per week despite the unavailability of some power stations due to various reasons (Approximately about 57 MW of generation deficit). Constant monitoring of trading power from India through Dhalkebar-Mujjaffpur Transmission line (400kV line presently operated at 132 kV voltages since 17th Feb 2016) and better management of imported power by LDC contributed significantly to minimize Load Shedding hours.
Grid Development Department
Brief summary of projects under different stages of development are presented below:
Recently Completed Projects
1. Butwal – Kohalpur 132kV Transmission Line 2nd Circuit
2. Chapali 132kV Substation
3. First Section Illam-Damak 132kV Transmission Line from Kabeli Corridor