Propagation delay measurement and compensation for sampled value synchronization in a smart substation

Zhang, Yanxu; Cai, Zexiang; Li, Xiaohua; He, Rong

doi:10.17775/cseejpes.2017.0024

Cited by 9 publications

(4 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To realize synchronization, when the IPSCS receives an SV message from a sampling device, it can obtain the exact sampling instant by subtracting the receipt instant and propagation delay of the SV message. This method, first mentioned in reference [24] by the coauthor of this paper, has been well proved in the applications of substations.…”

Section: Synchronization Based On Propagation Delay Compensationmentioning

confidence: 77%

“…From reference [24], we can conclude that the propagation delay contains three parts, which are the rated delay, Ethernetswitch delay and fiber delay. The rated delay represents the fixed data processing time of ITs, which is recorded in the data sets of SV messages.…”

Section: Synchronization Based On Propagation Delay Compensationmentioning

confidence: 99%

“…However, the fiber delay is always ignored in substations because it only lasts for several nanoseconds. Therefore, the Ethernet-switch delay is the only variable part considered in reference [24].…”

Section: Synchronization Based On Propagation Delay Compensationmentioning

confidence: 99%

See 2 more Smart Citations

Communication-Assisted Protection and Self-Healing Control Scheme for Distribution Networks Based on IEC 61850

Cai

Liu

et al. 2020

IEEE Access

Self Cite

View full text Add to dashboard Cite

Communication-assisted protection and self-healing control (CAPSC) is perceived as a new alternative to ensure reliable operation of distribution networks (DNs) because of its prominent advantages of information sharing. Although the application of CAPSC based on IEC 61850 has been verified in substations, it has not yet been effectively promoted in DNs. To fully exert its advantages in DNs, a novel scheme of IEC 61850-based CAPSC is proposed in this paper. The proposed scheme enable samplings to be synchronized by propagation delay compensation without external clocks. Adaptive execution algorithms of protection and self-healing control are introduced considering changeable topology and configuration conditions. The coordination between protection and self-healing control in this scheme is simplified by component state descriptions instead of event signals. The scheme proposed in this paper has been incorporated in an engineering field application. A closed-loop test has been conducted on a real-time digital simulator (RTDS) according to the field connections and parameters to verify the rationality and effectiveness of the proposed scheme.INDEX TERMS Distribution networks, IEC 61850, protection and self-healing control, RTDS.

show abstract

Section: Synchronization Based On Propagation Delay Compensationmentioning

confidence: 77%

Section: Synchronization Based On Propagation Delay Compensationmentioning

confidence: 99%

See 1 more Smart Citation

Communication-Assisted Protection and Self-Healing Control Scheme for Distribution Networks Based on IEC 61850

Cai

Liu

et al. 2020

IEEE Access

Self Cite

View full text Add to dashboard Cite

show abstract

“…The associate editor coordinating the review of this manuscript and approving it for publication was Dongbo Zhao. mission [5]- [7]. Interpolation technique is a simple and practical measure to solve such issues.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis and Threshold Quantization of Transformer Differential Protection Under Sampled Value Packets Loss/Delay

Hao

Qingyun

et al. 2019

IEEE Access

Self Cite

View full text Add to dashboard Cite

The performance of the process network in the smart substation is particularly important for relaying functions implementation, and the transmission quality of sampled value packets is becoming the key constraint on protections because they carry practical parameters of the power system without repeated transmission. By means of phasor form and simulation, the model is built to analyze the operating characteristics of differential protection during the normal condition, external faults, and internal faults of the transformer, while packet loss/delay occurring at a different time and using different corrective measures. Considering the change of power equipment capacity, external fault types, starting points on wave and sampling frequency, the security boundaries are constructed for consecutive loss of sampled value packets. In addition, two indices are put forward to weigh the tolerance thresholds. Finally, the degree of dependability of differential protection due to the packet loss is further analyzed under the transformer internal faults. INDEX TERMS Boundary analysis, estimation algorithm, packet loss, sampled value (SV), transformer differential protection.

show abstract

Molecular Dynamics Simulation in Compatibility and Mechanical Properties of Chloroprene Rubber/Polyurethane Blends

Chen

et al. 2023

Advcd Theory and Sims

View full text Add to dashboard Cite

Five simulation models of chloroprene rubber (CR)/polyurethane (PU) with different composition ratios (9/1, 8/2, 7/3, 6/4, 5/5) are constructed and simulated using molecular dynamics (MD) simulation. The effects of PU content on blend compatibility and mechanical properties are investigated using solubility parameters, the Flory–Huggins interaction parameter, binding energy, glass transition temperature, and the radial distribution function. The objectives of this study are to develop a computational model based on MD techniques to investigate the compatibility and mechanical properties of CR/PU blends. The results of the solubility parameter indicated that PU has good miscibility with CR. The analysis of interaction parameters, binding energy, glass transition temperature, and radial distribution function show that CR/PU blends with mass ratios of 9/1, 8/2, and 7/3 have good compatibility. Moreover, the analyses of binding energy, pair correlation function, and radial distribution function reveal the reasons for the variation in mechanical properties of the blend systems. Additionally, the correctness of the calculation model and the results are verified by experimental tests and analyses.

show abstract

Propagation delay measurement and compensation for sampled value synchronization in a smart substation

Cited by 9 publications

References 0 publications

Communication-Assisted Protection and Self-Healing Control Scheme for Distribution Networks Based on IEC 61850

Communication-Assisted Protection and Self-Healing Control Scheme for Distribution Networks Based on IEC 61850

Performance Analysis and Threshold Quantization of Transformer Differential Protection Under Sampled Value Packets Loss/Delay

Molecular Dynamics Simulation in Compatibility and Mechanical Properties of Chloroprene Rubber/Polyurethane Blends

Contact Info

Product

Resources

About