Extension of the electricity grid in Pakistan.
This project, called ADB81, is managed by the Pakistani national electrical body, NTDC (National Transmission & Dispatch Company), which has chosen SELTA for the design and implementation of a telecommunications and remote control solution, for a total value of 5 $ million. SELTA's telecommunications and remote control systems have been chosen to expand and manage Pakistan's electricity network, in order to supply energy to a greater number of people, thus supporting the country's socio-economic development. SELTA took care of the design, production, supply, installation and commissioning of telecommunication and remote control systems for 21 electrical substations (220 KV and 500 KV). The Islamic Republic of Pakistan has received a loan from the Asian Development Bank (ADB) in favor of the Investment Program for upgrading the power transmission. The project consists of telecommunications systems on the HV line (Digital Power Line Carrier - STED - and Coupling device - SBSN, SCA), capable of transmitting voice and data between two substations. The system is completed with Teleprotection terminals - SELTA TPS-NU - able to protect the electric line from overcurrent and / or short circuit.
- In some of the substations, SELTA has provided the SDH terminal (STM 1/4) equipped with voice, data and remote protection interface, to protect the power line with a redundant configuration: via DPLC and SDH link.
- SELTA also supplied 6 PABX in some of the main substations to interface local subscribers, remote subscribers and PTT line via DPLC and SDH.
- Remote terminal units with local SCADA are installed in the main substation; the RTUs manage all the signals, measurements and commands involved in the 220 kV and 500 kV section. All the information received by the RTU is displayed and managed by the SCADA in which the video pages show the wiring diagram of the system.
- For several substations, the SELTA supply includes chargers and batteries, in order to guarantee the power supply of all the equipment for many hours, as required by NTDC.
National electricity authority in Pakistan, NTDC (National Transmission & Dispatch Company), has decided to extend its network including areas not yet served. Power grid expansion project needs a remote control system and a service telecommunications system able to manage it. Another important element is the SCADA platform, provided with a local interface, able to display the alarms coming from the peripheral devices.
SELTA has been able to respond to customer’s needs thanks to its complete portfolio for automation and telecommunications. Regarding service telecommunications, SELTA’s systems have provided: - a stable and fast transmission line - the possibility to create a ringed network, capable to solve traffic addressing problems by selecting different routes and to enable network redundancy, also using different transmission media - advanced diagnostic tools: real time fault and graphical history of faults and amount of data transmitted Regarding the remote control system, it’s possbile: - to transmit all the information via standard protocol to remote and local control centers or to remote operations for maintenance - to check operations independently from control center through software and hardware interlocking - to have a local device able to manage all data, in particular: recording, storing and printing; transmission to the control center; displaying for local operator in order to evaluated the scenario of a passed fault
National electricity authority in Pakistan, NTDC, has been able to extend its power grid bringing electricity in areas not yet served through a solution of high efficiency and reliability. SELTA has implemented on the field an high quality solutions bringing better life conditions for people living in the country. SELTA’s role has been of supplier-partner, granting availability and services also during post implementation phases.