The state of Chhattisgarh came into existence on 01.11.2000 and Chhattisgarh State Electricity Board w.e.f. 15.11.2000, State Load Despatch Centre started functioning from 01.12.2000 in the premises of 400KV Sub-Station, at Khedamara Bhilai.Thereafter SLDC joinned the Unified Load Dispatch and Communication Scheme of Power Grid along with other constituent states of Western Region and Central Sector.
Accordingly the state of the art SCADA system was establish in SLDC Bhilai at a total capital cost of about Rs. 17.03 crores which became operational on 01.02.2006. Further in the month of January 2012, The State Load Despatch, Chhattisgarh has been shifted to it new building at Danagania Raipur & started functioning from 13/01/2012.
This departent is the nodal office for approval of Short Term Open Access(STOA) and as on 31.07.2008 it is handling the open access transanctions of 22 customers.On commercial front UI bills are also being issued by SLDC Raipur for the above transactions.
There is two level of control hierarchy where at the bottom are the RTU (Remote Terminal Unit) at grid stations / generating stations and at the top level is SLDC. Real Time Data flows from bottom to top. SLDC data in turn flows to WRLDC, Power Grid. All the regional Load Dispatch Centers report to National Load Dispatch Centers at New Delhi.
Sophisticated computers and communication equipments are installed at SLDC, which have been interconnected through associated communication network comprising of Fibre Optic Communication Link, and PLCC links. The network also acts as a bridge connecting WRLDC with rest of the Western Region constituent States as their data flows to WRLDC through SLDC,Bhilai communication network.
The Transmission network is a part of entire Western Region, which include constituent states, central sector, and Power Grid. This vast communication network allows on-line availability of field data of entire western region at our SLDC , which helps system engineers to know the real time status of entire western grid for taking prudent decisions in the event of most complex power system scenario.
One Video Projection System (VPS) having 134" large screen, besides high speed data servers, workstations, is installed at SLDC which depicts various network scenarios displayed in text as well as graphic form which provide instant overview of the power system to the operators for load dispatch.This data is also extended to Chairman,all the companies heads,and other important offices at Raipur Head Quarter through Remote control stations for monitoring and quick decisions.
The SCADA system is equipped with self-diagnostic features along with facilities for recording of Sequence of Events (SOE) giving the type, location and occurrence of specific events. This information is used for post fault diagnosis/studies. Apart from above, the system is also equipped with historical data recorder (HTR) which records power system dynamics even under normal conditions which can be replayed at any point of time for reference or analytic studies.
There are separate Utilities/Companies within a state are engaged in generation, transmission, and distribution of electricity. State Load Dispatch Centre monitors these operations in real time round the clock and co ordinate with them and WRLDC for maintaining grid security and keeps the account of quantity of electricity transmitted through the state grid.
Supervisory Control And Data Acquisition System (SCADA) is a high tech computer system with associated communication network that enables supervision and control of power system network
a. Constant access to Real Time display of entire network showing power system voltage, frequency, line loadings of MW, MVAR, etc
b. Supervision, monitoring and control of power in Real Time.
c. Optimal operation of power system, i.e. generation and associated resources.
d. Minimum of outage and faster restoration of the system in the event of Grid disturbances.
e. Improvement in the quality of supply through better control of frequency, voltage and other parameters.
f. Less dependence on basic telephone system
