Hardware-in-the-loop Testing of Line Differential Protection Relay Based on IEC 61850 Process Bus

2020 ◽  
Author(s):  
O. Palizban ◽  
H. Hafezi ◽  
K. Kauhaniemi ◽  
M. Hämäläinen
Keyword(s):  
Differential Protection ◽  
Hardware In The Loop ◽  
Iec 61850 ◽  
Protection Relay

Transformer Differential Protection Using Process Bus According to IEC 61850-9-2 and Non-Conventional Instrument Transformers

2015 ◽  
Vol 799-800 ◽  
pp. 1311-1315
Author(s):  
G. Igarashi ◽  
J.C. Santos
Keyword(s):  
Time Synchronization ◽  
Power Transformers ◽  
Response Analysis ◽  
Differential Protection ◽  
Iec 61850 ◽  
Instrument Transformers ◽  
Synchronization Signal ◽  
Conventional Instrument ◽  
Transformer Differential Protection

Our aim is to show some impacts on the differential protection of power transformers when using Non-Conventional Instrument Transformers associated with the IEC 61850-9-2 process bus. Described herein are a model for simulating the samples in the process bus, a proposed algorithm for differential protection of power transformers adapted from conventional differential relays so that it works according to the IEC 61850-9-2 standard, and a response analysis of the protection algorithm with the loss of the time synchronization signal in the process bus. Suggestions on parameters to be followed for safer operation of the process bus in these circumstances are also offered.

scholarly journals IEC 61850-Based Centralized Busbar Differential Protection with Data Desynchronization Compensation

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 967 ◽  
Author(s):  
Myeong-Hoon Song ◽  
Sang-Hee Kang ◽  
Nam-Ho Lee ◽  
Soon-Ryul Nam
Keyword(s):  
Time Synchronization ◽  
Interpolation Polynomial ◽  
Differential Protection ◽  
Iec 61850 ◽  
Synchronization Errors ◽  
Protection Scheme ◽  
Evaluation Module ◽  
Real Time Digital Simulator ◽  
Intelligent Electronic Devices ◽  
Differential Current

This paper proposes an IEC 61850-based centralized busbar differential protection scheme, in which data desynchronization between intelligent electronic devices (IEDs) leads to differential current errors. As the differential current errors could result in erroneous operation of the centralized busbar differential protection, data desynchronization should be compensated for. The main causes of data desynchronization are subdivided into measurement timing and time synchronization errors. In this paper, the first-order Lagrange interpolation polynomial is used to compensate for measurement timing errors and the voltage angle differences between IEDs are used to compensate for time synchronization errors. The centralized busbar differential protection is tested using a real-time digital simulator and IEC 61850-based IEDs, which are implemented with the MMS-EASE Lite library and Smart Grid Infrastructure Evaluation Module. The test results show that the data desynchronization compensation can significantly reduce differential current errors, and thus prevent erroneous operation of the IEC 61850-based centralized busbar differential protection.

scholarly journals Real-Time Performance and Security of IEC 61850 Process Bus Communications

2021 ◽  
Author(s):  
Stéphane Mocanu ◽  
Jean-Marc Thiriet
Keyword(s):  
Real Time ◽  
Communication Networks ◽  
Communication Protocol ◽  
High Availability ◽  
Hardware In The Loop ◽  
Power Network ◽  
Iec 61850 ◽  
Time Performance ◽  
Network Communications ◽  
Practical Feasibility

Modern power-network communications are based on the IEC 61850 series standards. In this paper, we investigate the real-time performance and the vulnerabilities and attack scenarios at the sensor level communication networks more precisely on Sampled Measured Value protocol. The approach jointly evaluates the communication protocol, network topology and impact on electrical protection functions. We test the practical feasibility of the attacks on an experimental workbench using real devices in a hardware-in-the-loop setup. The tests are conducted on the two high-availability automation networks currently used in IEC 61850 process bus communications: Parallel Redundancy Protocol (PRP) and High-availability Seamless Redundancy (HSR)

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