Design of a Time Synchronization System Based on GPS and IEEE 1588 for Transmission Substations

Guo, Haijuan; Crossley, P.A.

doi:10.1109/tpwrd.2016.2600759

Cited by 44 publications

(29 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A communication channel such as Ethernet cables sends the synchronized measurements to a processing station. Time synchronization can be done nowadays by using GPS transducers, within a tolerance of ±1 µs [21].…”

Section: Fault Location Based On Traveling Wave Theorymentioning

confidence: 99%

Novel Method for Identifying Fault Location of Mixed Lines

et al. 2018

View full text Add to dashboard Cite

The identification and localization of a fault are a basic requirement for optimal operation of a modern power system. An effective fault identification method significantly reduces outage time, improves the electrical supply reliability, and enhances the speed of protection control. This paper proposes a novel method based on the theory of the two-terminal traveling wave range to identify the fault location in a voltage source converter based high voltage direct current (VSC-HVDC) system containing mixed cable and overhead line segments. It uses variational mode decomposition (VMD) and the Teager energy operator (TEO) as a new method to detect the traveling wave fault through a fault signal. The effectiveness of the proposed method is verified via time domain simulation of the hybrid VSC-HVDC transmission system using PSCAD/EMTDC and MATLAB software. Simulation results show that the proposed method demonstrates high fault location accuracy and excellent robustness with a slight effect on transient resistance and fault types, and that it performs better than the existing transient detection techniques, such as wavelet transform and ensemble empirical mode decomposition.

show abstract

Section: Fault Location Based On Traveling Wave Theorymentioning

confidence: 99%

Novel Method for Identifying Fault Location of Mixed Lines

et al. 2018

View full text Add to dashboard Cite

show abstract

“…This paper evaluates the real-time timing performance of IEEE 1588 for future transmission substations. The work extends the activities described in an earlier paper [18]. The main contributions of this paper are listed as follows: 1.…”

Section: Introductionmentioning

confidence: 70%

“…All cables connected to the server were 1.5 m 50 W RG58 coaxial with BNC connectors. The description and accuracy validation of the server are described in [18]. The measurement error associated with the server was correctly calibrated by modifying its configuration settings.…”

Section: Experimental Setup and Methodologymentioning

confidence: 99%

“…PTP switches which cannot correctly handle PTP traffic, will result in a loss of PTP messages and affect the synchronisation accuracy. The previous study investigated the performance limit of a PTP network under excessive PTP traffic within a single time domain [18]. However, the capability of a TC to process message from multiple domains was not addressed.…”

Section: Impact Of Ptp Traffic From Multiple Time Domainsmentioning

confidence: 99%

See 1 more Smart Citation

IEEE 1588 time synchronisation performance for IEC 61850 transmission substations

Han

Guo

Crossley

2019

International Journal of Electrical Power & Energy Systems

Self Cite

View full text Add to dashboard Cite

Accurate timestamping with 1 µs precision is required by power system monitoring and control equipment, including: Phase Measurement Units (PMU) for real-time measurement and control; travelling wave detectors for fault location, protection and control; and sample value measurement techniques associated with the IEC 61850 process bus. The conventional way of achieving this is to transmit 1-PPS or IRIG-B timing signals using dedicated cables but such an approach is expensive and difficult to update as secondary control systems evolve. IEEE 1588 precision time protocol (PTP) allows the transmission of time information with submicrosecond accuracy in an Ethernet network. However, a comprehensive study is required to enhance the confidence of the power industry in using PTP in present and future IEC 61850 based substations. This paper delivers a design and experimental validation of the real-time time synchronisation characteristics achievable with IEEE 1588. Several factors which can potentially affect the synchronisation accuracy in delivering a time reference from the master clocks to the end devices during both steady-state and transient changes were investigated. The objective is to increase the understanding of the real-time performance of a complete IEEE 1588 timing system applied in transmission substations, and identify the limitations of commercially-available devices.

show abstract

“…If the cable is too long, the current transmission time will be prolonged, which will cause a large time difference. Guo and Crossley [4] presented a procedure to assess the performance of a timing system based on distributed GPS receivers. But this method is expensive and not practical.…”

Section: Introductionmentioning

confidence: 99%

Online Calibration Method for Current Sensors Based on GPS

Shuang¹,

Li²,

Li³

2019

Energies

View full text Add to dashboard Cite

At present, most sensor calibration methods are off-line calibration, which not only makes them time-consuming and laborious, but also causes considerable economic losses. Therefore, in this study, an online calibration method of current sensors is proposed to address the abovementioned issues. The principle and framework of online calibration are introduced. One of the calibration indexes is angular difference. In order to accurately verify it, data acquisition must be precisely synchronized. Therefore, a precise synchronous acquisition system based on GPS timing is proposed. The influence of ionosphere on the accuracy of GPS signal is analyzed and a new method for measuring the inherent delay of GPS receiver is proposed. The synchronous acquisition performance of the system is verified by inter-channel synchronization experiment, and the results show that the synchronization of the system is accurate. Lastly, we apply our online calibration method to the current sensor; the experimental results show that the angular difference and ratio difference meet the requirements of the national standard and the accuracy of the online calibration system can be achieved to 0.2 class, demonstrating the effectiveness of the proposed online calibration method.

show abstract

Design of a Time Synchronization System Based on GPS and IEEE 1588 for Transmission Substations

Cited by 44 publications

References 17 publications

Novel Method for Identifying Fault Location of Mixed Lines

Novel Method for Identifying Fault Location of Mixed Lines

IEEE 1588 time synchronisation performance for IEC 61850 transmission substations

Online Calibration Method for Current Sensors Based on GPS

Contact Info

Product

Resources

About