tailieunhanh - Programmable Logic Controller plant through MMI Part 13

Tham khảo tài liệu 'programmable logic controller plant through mmi part 13', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 149 Development of Customized Distribution Automation System DAS for Secure Fault Isolation in Low Voltage Distribution System the power analyzer. The SCADA software used in this research is propriety software shared by the same protocol with the embedded Ethernet controller which makes the communication possible by using modbus TCP protocol. The HMI can be monitored at different sites as the controller equipped with TCP IP features. Whenever the system detects fault an alarm message will be displayed at the HMI side to acknowledge the operator. The status of communication between the controller digital I O modules power analyzer with the HMI helps to acknowledge the operator if there is a communication breakdown. This feature improves the reliability of the SCADA system in sending or receiving data from the devices. Based on the experimental results the system correctly locates the fault point isolates the fault point and reenergizes the un-faulted loads. However during the fault isolation operation the system has to detect the fault point by simply switching on the fault load. After the system acknowledges the fault point the appropriate switching functions are executed. The developed system has a potential in reducing the outage time while comparing to the manual operation by the technicians and engineers. The SCADA system provides GUI alarm system data logging and report management facilities for the operator to interact with the equipment in the service substation and the customer service substation. The usage of RTU allows for future expansion. New technologies such as GSM and satellite communication are becoming available and will allow for new low cost automation system solutions. 8. Future research This research project is a step towards developing customized DAS for LV distribution system and much more work lies ahead in evaluating new DAS technology and in developing new DAS applications. However the outcome of this research as first effort has been very