Load Dispatch Center (LDC) is the centralized facility for operational coordination and dispatch activities of OETC. The facility consists of main control center at Mawalleh. A back up control center is under construction at a different location. A regional control center at Salalah handles the activities related to Dhofar area. Together, these control centers form vital infrastructure to realize OETC’s objective of ensuring safe, secure, reliable and economic Transmission and Dispatch. LDC is committed to contribute in realizing the vision and mission of OETC.
The activities of LDC consist mainly of the following.
Operational Coordination – Coordinating various operations in the transmission system from planning stage to actual operations including maintenance, and handling any related contingencies.
Dispatch – is the main function which balances system load with generation on a continuous basis in real time. This activity starts with load forecast, generation maintenance planning, scheduling of power and water dispatch and proceeds up to issuing dispatch instructions in real time.
Communication and SCADA – planning, implementation and maintenance of the communication and computer infrastructure which facilitates the above functions of Operational coordination and Dispatch.
Issuing operational reports related to system performance.
Collection and issue of energy settlement reports which are used for inter-company billing in the sector.
In order to achieve these objectives the LDC is organized as three functional sections with their own managers. All managers report of Senior Manager, LDC who in turn reports to Chief Operating Officer. LDC is staffed by about 50 persons, working at Mawalleh and Salalah control centers.
This section is headed by Control manager. Their main job is focused on real time operations to ensure safe, reliable, secure and economic transmission of power and dispatch of generation. The main activities in Control are
Real-time monitoring and control.
Dispatch of generation from all power stations.
Operations of 400 kV, 220 kV, 132 kV circuits (lines and transformers) and 33 kV incomer CBs.
Ensure strict compliance of safety procedures.
Preparation of various reports related (daily reports & incident reports).
Coordinate commissioning, testing and maintenance programs.
Issue and Cancel safety documents.
Prevent deterioration of the system.
Operational planning section is headed by Operational Planning manager. The section mostly works with advance planning of generation and transmission (usually from two years to one day advance time frame). The section also handles the energy metering function and issue of important operational reports. The main activities of Operational l Planning are
Responsible for Short and medium term Planning – Load-Generation balance and Transmission system status.
Analysis of Economics of System Operations & Dispatch – develop rules of dispatch.
Study system behavior, analyze contingencies and prepare appropriate plans.
Prepare monthly Transmission & Dispatch reports and annual performance reports.
Issue annual maintenance programs (Power + Water).
Planning of Dispatch based on merit order, heat rates, start up costs, incremental costs and optimum generation patterns.
Load forecasting on weekly and annual basis.
System studies – Load flow, Stability, State estimation, (n-1) criteria.
Verification and carrying out switching programs, analysis of operational risk and timely decision making.
Prepare monthly energy transaction statements in the system for all bulk supply points.
Telecom and SCADA section is headed by Telecom Manager. They are responsible for backbone telecommunication network which is used for protection, communication, energy meter reading and SCADA in the system. They are also responsible for the core SCADA infrastructure from remote interface devices to central servers and workstations. This infrastructure is vital for OETC to discharge their operation and dispatch duties. The main activities of this section include
Maintenance of communication network including fiber optic infrastructure and communication interface panels and telephone systems.
Management of remote monitoring devices (RTUs or SCS systems) at substations, including project management and maintenance and configurations.
Specifications, installation, preparation and maintenance of all software and hardware used in (LDC).
Backup of data on the SCADA system.
Maintain of Servers and Workstations in LDC.
Supervision of the operating system for optimal observation and control (SCADA).
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