1 / 15

Application of a RTU for load tap changer monitoring and control

Application of a RTU for load tap changer monitoring and control. ECE 504 Alejandro Schnakofsky Raleigh, NC. Content. Motivation and objectives What is an RTU What is a load tap changer Components The DNP3 protocol Signal list Functionality Demo. Motivation and objectives.

trevet
Download Presentation

Application of a RTU for load tap changer monitoring and control

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Application of a RTU for load tap changer monitoring and control ECE 504 Alejandro Schnakofsky Raleigh, NC

  2. Content • Motivation and objectives • What is an RTU • What is a load tap changer • Components • The DNP3 protocol • Signal list • Functionality • Demo

  3. Motivation and objectives • Learn about RTUs and their application • Program RTU to: • Monitor LTC • Control LTC • Serve LTC data via a communication protocol • Automatic voltage adjustment logic

  4. What is an RTU? • A remote terminal unit is a device that collects information regarding a process • Voltage • Current • Status indications (position of a breaker) • It then reports that information to a higher level system such as SCADA, DCS, etc

  5. What is an RTU? • Inputs: • Binary • mA • RTD • Outputs: • mA • Contact • Communications: • DNP • Modbus • IEC61850 • Profibus • Spa • RS232 • RS485 • Modem • Ethernet

  6. What is Load Tap Changer? • Load tap changer is a device that has the capability of changing the turns ratio of a transformer or auto transformer • By varying the turns ratio the voltage at the load terminal can be adjusted.

  7. What is Load Tap Changer? • Load tap changer is a device that has the capability of changing the turns ratio of a transformer or auto transformer • By varying the turns ratio the voltage at the load terminal can be adjusted.

  8. What is Load Tap Changer?

  9. Components • ABB RTU 560 • Binary input card • mA input card • Binary output card • DNP protocol and PLC licenses • Howard Industries SVR-1 voltage regulator • ASE2000 DNP protocol test set • Laptop

  10. The DNP3 protocol • A master-slave protocol for data acquisition and control applications • 3 Layers • Link • Transport • Application • Functions • Read • Select • Operate

  11. The DNP3 protocol • Data is divided into objects • Object 1: binary inputs • Object 30: analog inputs • Object 60: class data • Object 12: operate relay • Several indexes inside objects representing data

  12. The DNP3 protocol

  13. Signal List

  14. Signal List

  15. Functionality • Report status signals via DNP3 • Handle commands from DNP3 • Handle commands from local interface • Local/Remote Logic • Auto/Manual Logic • Determine tap position • Automatic tap change logic • WebHMI interface to easily view status information of tap changer

More Related