A Study on IEC 61850-Based Time Synchronization Error Estimation between Substations using Estimated Voltage / Current Phasor of Adjacent Substation considering Transmission Line Constants

2021 ◽  
Vol 70 (4) ◽  
pp. 593-598
Author(s):  
Min-Soo Kim ◽  
Sang-Hee Kang
Keyword(s):  
Transmission Line ◽  
Error Estimation ◽  
Time Synchronization ◽  
Synchronization Error ◽  
Iec 61850

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 The Effect of Time Synchronization Error in LAN-Based Digital Substation

Sensors ◽  
2019 ◽  
Vol 19 (9) ◽  
pp. 2044 ◽  
Author(s):  
Kyou Jung Son ◽  
Tae Gyu Chang ◽  
Sang-Hee Kang
Keyword(s):  
Time Synchronization ◽  
Synchronization Error ◽  
Distance Protection ◽  
Proposed Model ◽  
Power Substation ◽  
Digital Substation ◽  
Good Guide ◽  
Precision Time ◽  
Intelligent Electronic Devices ◽  
Precise Time

In this paper, the effect of time synchronization error on protection algorithms are studied for the usage of the LAN-based collaborative protection. In order to derive the effect of time synchronization, this paper proposes a substation model which is constructed with IEEE 1588 Precision Time Protocol (PTP) supported intelligent electronic devices. The proposed model is used as an example of a target platform to study the effect of time synchronization error with two typical substation protection algorithms, i.e., current differential-based substation protection and distance protection algorithms. From the analyzed and the simulated results, it was well observed that time synchronization error is a significant error-causing factor for both protection algorithms, resulting in erroneous detection of faults and erroneous estimation of fault distances, respectively. The results of research performed in this paper are expected to provide a good guide for constructing the future LAN-based digital power substation with precise time synchronization.

scholarly journals A New Finite-Time Observer for Nonlinear Systems: Applications to Synchronization of Lorenz-Like Systems

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Ricardo Aguilar-López ◽  
Juan L. Mata-Machuca
Keyword(s):  
Nonlinear Systems ◽  
Control Theory ◽  
Finite Time ◽  
Numerical Experiments ◽  
Time Synchronization ◽  
Upper Bounds ◽  
Observer Design ◽  
Synchronization Error ◽  
Chaotic Oscillator ◽  
Chaotic Oscillators

This paper proposes a synchronization methodology of two chaotic oscillators under the framework of identical synchronization and master-slave configuration. The proposed methodology is based on state observer design under the frame of control theory; the observer structure provides finite-time synchronization convergence by cancelling the upper bounds of the main nonlinearities of the chaotic oscillator. The above is showed via an analysis of the dynamic of the so called synchronization error. Numerical experiments corroborate the satisfactory results of the proposed scheme.

Sign in / Sign up

Export Citation Format

Share Document