SLDC Design office is mainly looking after implementation, Updation, Up-keep and maintenance of SCADA system in PSTCL. In addition to this, jobs involving use of IT such as implementation of ABT based remote metering scheme in Punjab and design, development & hosting of SLDC Website etc. are also being handled by this office.

Major Projects done by SLDC Office

SCADA/EMS:  SCADA/EMS (Supervisory Control and Data Acquisition/Energy Management System) was successfully implemented by SLDC office under the ULDC Scheme of PGCIL in the year 2002. Existing SCADA/EMS related hardware and software has been supplied by M/s Areva. There are three control centres in erstwhile PSEB with the Main control centre i.e. State Load Dispatch centre (SLDC) at Ablowal and 2 Nos. Area Load Dispatch centres (ALDCs) at Laltonkalan (Ludhiana) & Jamsher (Jalandhar).

Under the scheme, all the Generating Station of PSPCL, Interstate tie lines, important 220kV & 132 kV grid substations of PSTCL have been covered for remote data acquisition and control. Presently 49 nos. RTUs have been installed at the above said locations for acquisition of online power system data through PLCC/Microwave communication media.

Objectives of SCADA System:

  1. To get real time data from remote locations.

  2. To monitor power supply during wide voltage & frequency fluctuations.

  3. To control Power Load flow from generating stations and other sources/substations.

  4. To monitor PSTCL share in centrally owned power projects.

  5. To regulate un-schedule interchanges (UI) under ABT.

  6. To minimize power cuts and regulate power drawl as per daily allocations/schedules.

Benefits of SCADA System:

  • Fast decision making in regulating power supply on the basis of Real time Data availability.

  • Availability of Historical data for the purpose of system analysis/ studies.

  • Improvement in grid stability.

  • Reduction in time for restoration of the grid system to normal position in case of abnormality/failure.

  • Monitoring and regulation of inter-state power transfer/ sale of power and maintaining grid drawls as per allocations.

  • The power controller responsible for management of power supply position in entire state of Punjab is able to get the real time information of power supply position throughout the Punjab, earlier  which was taken telephonically.

Design, development & hosting of SLDC Web-Site: SLDC office took a challenging task to design, develop and host Punjab SLDC Website though its internal man power resources and completed the task with in time. Punjab SLDC Website was hosted during June 2010.

Projects in hand

Expansion of SCADA/EMS: In order to cover left out important 220KV, 132KV existing grid Sub Stations, PSTCL is in process of procuring new RTUs to be installed, commissioned and integrated with the existing SCADA/EMS system.

Implementation of ABT based Metering scheme in Punjab: Presently, this office has finalized the technical specification of 0.2s accuracy class ABT (Availability Based Tariff) type meters subject to the revision in Punjab State Grid Code, as per the recommendations of Commercial and Metering Committee (CMC) which are to be installed at Open Access consumer premises and Intrastate Boundaries.