SUPERVISORY CONTROL AND DATA ACQUISITION IN POWER SYSTEMS

SUPERVISORY CONTROL AND DATA ACQUISITION IN POWER SYSTEMS

ABSTRACT:

The implementation of “SCADA” (Supervisory Control And Data Acquisition) along with its software aims at the “CONTROL AND OPERATION OF INTER CONNECTED POWER SYSTEM”

By using SCADA system a large network having several generating stations and substations and large load centres is controlled from central load dispatch centre.

In this system the real time data from the power system is acquired through transducers (which converts the a.c. signals from the C.T.’s and P.T.’s to the dc signal proportional to the measured value for the respective parameters) is converted to the digital signals. Then the data through the RTU (Remote Terminal Unit), which is located at the generating stations or substations is transmitted to the load control centre through powerline carrier system (PLCC), fiber optics communication and microwave channels. In this way the data acquisition is completed. The data, which is processed by the computer systems employing energy management software, provides automatic and remote control of the network at the load control centre. Then the instructions from the load control centres are transmitted to the control rooms of the substation and generating station for executing appropriate action.

Digital computers and microprocessor installed in the control rooms of large substation generating station and load control centre are used for data collection, data monitoring and a automatic control.

Thus, by employing SCADA system to power distribution network provides integrated approach to the power system protection, operation control and monitoring automatically with least intervention of control room operator.


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