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Real-Time Grid Management
Published in Stuart Borlase, Smart Grids, 2018
Stuart Borlase, Jiyuan Fan, Xiaoming Feng, Jay Giri, Douglas Wilson, Gerald R. Gray, Zhenyu (Henry) Huang, Walter Sattinger, Bo Yang, Bo Zeng, Stuart Borlase, Jiyuan Fan, Jay Giri, Zhenyu (Henry) Huang, Rajat Majumder, Rui Menezes de Moraes, Thomas Morris, Reynaldo Nuqui, Manu Parashar, Walter Sattinger, Tim Taylor, Jean-Charles Tournier
The electric power industry has a specific set of requirements for SCADA systems. Real-time requirements for the monitoring and control of the transmission system, and for main distribution substations and feeders are typically in the range of 1–5 s. The RTU is a microprocessor-based device that provides real-time data to the SCADA system and enables the SCADA system to issue controls to the field equipment. Typical RTUs have physical hardware inputs to interface with field equipment and one or more communications ports (Figure 5.2). In some modern systems, the RTU can generate commands for local control actions at the site of the RTU without the need to communicate to the SCADA system. In recent years, with the proliferation of IEDs, many of these devices are taking over the RTU functionality.
Smart Grid Communication Network and Its Applications
Published in F. Richard Yu, Xi Zhang, Victor C. M. Leung, Green Communications and Networking, 2016
Zhao Li, Dmitry Ishchenko, Fang Yang, Yanzhu* Ye
Located between the field devices and the SCADA master, a remote terminal unit (RTU) is a device acting as a master for series-connected field devices [40], the purpose of which is to minimize the number of point-to-point connections from SCADA masters to field devices. Hence, the downstream of RTU is a large number of field devices and the upstream is SCADA masters. The RTU functions as a broker or a data collector, transporting information back and forth between the SCADA masters and the field devices (e.g., the IED and smart meters) primarily using serial communication protocols.
Smart Grid Technologies
Published in Stuart Borlase, Smart Grids, 2017
The RTU is a microprocessor-based device that interfaces with a SCADA system by transmitting telemetry data to the master station and changing the state of connected devices based on control messages received from the master station or (in some modern systems) commands generated by the RTU itself. The RTU provides data to the master station and enables the master station to issue controls to the field equipment. Typical RTUs have physical hardware inputs to interface with field equipment and one or more communication ports (Figure 3.24).
SCADA Research Lab Kit for Educational Institutes
Published in IETE Journal of Education, 2019
Lagineni Mahendra, Rajesh Kalluri, R.K. Senthil Kumar, B.S. Bindhumadhava, G.L. Ganga Prasad
RTU is a two-way communication hardware device, it keeps updating the status of the field continuously to control centre and simultaneously executing the control commands from the control centre. Portable Supervisory Unit and Programmable Automation Controller (PUSPAC) RTU has Controller card, Analog Input (AI) card, Analog Output (AO) card, Digital Input (DI) card, Digital Output (DO) card and field signal simulation Bench. RTU data communication is compliant with IEC 60870-5-101/IEC-60870-5-104/MODBUS-serial/ MODBUS TCP protocols. Figure 6 shows the PUSPAC RTU with a field signal Simulation kit and Figure 7 shows the front panel overview of the PUSPAC RTU. RTU has 9 slots to insert various cards of the RTU and also can be extended using extension interface cards. Controller Card:
The influence of IEC 61850 standard: implementation and development of a functional substation automation simulator
Published in Australian Journal of Electrical and Electronics Engineering, 2020
After a few years of familiarisation and adaptation of the simulator, the portable simulator testing unit was developed to become complex and more robust. The popularity of power systems and communication systems in an electrical substation prompted VU to improve the simulator by adding a Remote Terminal Unit (RTU). The RTU is an electronic-controlled device that interfaces with physical objects through centraliseda system of software and hardware called Supervisory Control and Data Acquisition (SCADA) (Amjadi, and Kalam 2015). Both SCADA and RTU play a major role in substation automation. The SCADA monitors and controls data and sends telemetry data to the RTU which is physically interfaced with different IEDs.