Enhancements to the time synchronization standard IEEE-1588 for a system of cascaded bridges

Jasperneite, Jürgen; Shehab, K.; Weber, K.

doi:10.1109/wfcs.2004.1377716

Cited by 71 publications

(29 citation statements)

References 1 publication

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“…Some recent works investigated about advantages and disadvantages arising from the use of these devices. Particularly, Jasperneite et al and Na et al [22][23][24] analyzed performance of BC and TC for a line topology configuration where different bridges are organized in a cascade configuration. In such a system only the employment of BCs, which compensate the frequency drift by means of a control loop (e.g.…”

Section: Global Positioning System-precision Time Protocol Hybrid Sysmentioning

confidence: 99%

Synchrophasors measurement in a GPS‐IEEE 1588 hybrid system

Lixia

Locci

Muscas

et al. 2010

Int Trans Elec Energy Syst

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This paper presents a study on a hybrid architecture considering Global Positioning System (GPS) and Precision Time Protocol (PTP), defined in Standard IEEE 1588, for applications in electric power systems, with reference to one of the most challenging measurement problems, namely the measurement of synchrophasors. The proposed approach refers in particular to situations in which many measurement devices, connected to each other by suitable communication links, are located in a geographically limited subarea of the power system. A laboratory experimental setup has been built to evaluate the performance achievable with this solution. A detailed analysis of the obtained results is presente

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Section: Global Positioning System-precision Time Protocol Hybrid Sysmentioning

confidence: 99%

Synchrophasors measurement in a GPS‐IEEE 1588 hybrid system

Lixia

Locci

Muscas

et al. 2010

Int Trans Elec Energy Syst

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“…In the switched Ethernet architectures, the PTP protocol, needed for the IEEE 1588 synchronisation, can easily be implemented by considering the switches as master clock references. Specific improvements in this case have been proposed by Jasperneite, Shebab and Weber (2004), and Gaderer, Loschmidt and Sauter (2005). The originality of the proposed approach is related to the accuracy of this estimate, especially compared to RTT measurements.…”

Section: Network Delay Measurementmentioning

confidence: 99%

Networked control with delay measurement and estimation

Vatanski¹,

Georges

Aubrun

et al. 2009

Control Engineering Practice

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In research on networked control systems (NCS), the performance of the control system is assumed to be affected by network-induced parameters such as delays, jitters, packet losses and link failures. In this paper, two delay compensation methods are studied, adaptive Smith Predictor and robust control, in the framework of Networked Control Systems while considering the protocol specifications. First, a clock synchronization protocol is implemented in each device of the network, thereby providing the possibility of end-to-end delay measurement, and a compensation strategy based on this measurement and the adaptive Smith Predictor is applied.Secondly, the end-to-end upper bound delay estimate is calculated on the basis of the network architecture and the traffic estimation, and then subsequently used in a robust control based compensation strategy. The switched Ethernet network is used as an example of the communication network of the NCS.

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“…To take into account the fact that a frame might go through a number of switches before reaching its destination, enough guard time should be left between the time slots. Furthermore, these delays diminish the accuracy of the distributed clock maintained by the participating nodes [87]. Another reason for inefficiency of the TDMA approach is related to the management of errors.…”

Section: A Modifications That Alter Compatibilitymentioning

confidence: 99%

“…Each switch or router must implement this functionality. It has been shown that boundary clocks behave reasonably as long as switches are not cascaded [87]. At the fieldbus level, the line topology ( Fig.…”

Section: B Solutions Based On Synchronization Of Clocksmentioning

confidence: 99%