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Design of a Tester for GOOSE Messages Performance Testing Defined in IEC 61850

Kaviani Baghbadorani, Eaman | 2021

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 54740 (19)
  4. University: Sharif University of Technology
  5. Department: Computer Engineering
  6. Advisor(s): Jahangir, Amir Hossein
  7. Abstract:
  8. Nowadays, electrical energy is a necessity and the use of intelligent power equipment is expanding. Of course, having a protocol for communicating between such equipment is not only useful but sometimes mandatory. In the past, each equipment manufacturer used its own method for communication, hence, the "IEC 61850" standard was proposed as a solution to solve the problem of communication between different equipment. In this research, we intend to design a tester to perform a performance test with for GOOSE messages. These messages are based on the IEC 61850 data set and have the ability to quickly and securely distribute input and output values at the system level, which are transmitted by a device via Ethernet in multicast scheme. The most important function of GOOSE messages is to send the Trip signal to the high voltage switches in order to cut off power in the area covered.The test is based on generating traffic, receiving replays, and calculating results, which include time, communication and processing latency. In such systems, the control devices must be informed of the status immediately and send the relevant command instantly (the maximum acceptable delay for the transmission of GOOSE-based messages is four milliseconds). The designed tester should be able to measure output latency by generating a sequence of physical input stimuli to intelligent electronic devices (IEDs), calculate the latency of the message generated by the IED, and test other performance components. For test purpose, a sequence of acceptable inputs should be generated and sent to the IEDs, the average latency and standard deviation time should be calculated, and the received output should be measured and evaluated according to specific criteria, and the device under test should be checked whether it complies with acceptable minimum delays and required performance or not. Finally, in order to evaluate the involved tester, a device with pre-determined test results must be tested and the results of the two tests are compared for the values of the studied variables.We designed tools and developed code for all GOOSE performance test procedure sections. These sections are traffic generator, DUT simulator and analyzer. In this time we are able to perform any considered GOOSE performance testing or GOOSE performance assessment that covers all related works. The tools we designed and used in our tester show 100% accuracy for online and 99.9% for offline tester. Also offline packet analyzer has 100% accuracy according to packet scheduling simulation and online packet generator jitter to configuration interval ratio less than 2% for 97/8% to 99/5% packets for different packet intervals. Our system used to run these software has Windows 7 OS, 8GB ram and core i5 cpu. These result reported after analyzing 1000 applied test vectors and software replies
  9. Keywords:
  10. IEC 61850 Standard ; Intelligent Electronic Devices (IEDs) ; Performance Test ; GOOSE Protocol

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