SDH-based time synchronous system for power system communications

Serizawa, Y.; Kitamura, K.; Myoujin, Masanori; Shimizu, Koichiro; Matsushima, Tohru; Morimitsu, M.

doi:10.1109/61.660850

Cited by 14 publications

(5 citation statements)

References 7 publications

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“…An ATM-native teleprotection system may satisfy such requirements. However, since system-wide or inter-system sampling synchronization is not easily achieved, an external time synchronous or time dissemination system such as a GPS or SDH-based time synchronous system [8] should be used for a wide-area protection system [9]. This eliminates the sampling synchronization function from the telecommunication system used for teleprotection so that the system has only the data exchange function, which makes the system design much easier.…”

Section: Payload (48 Bytes) Header 5 Bytes)mentioning

confidence: 98%

ATM transmissions of microprocessor-based current differential teleprotection signals

Serizawa

Shimizu²,

Fujikawa³

et al. 1999

IEEE Trans. Power Delivery

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This paper describes prudent considerations for applying asynchronous transfer mode (ATM) transmissions, which can provide broadband and multimedia communications as well as flexible, efficient and wide-area networks, to microprocessor-based current differential teleprotection systems. As both functions of current data transmission and simultaneous sampling among remote terminals are required for the telecommunication systems, measures against cell losses and cell delay variations in ATM network elements such as terminal adapters and switches are proposed for the present delaysensitive teleprotection systems. Allowable system configurations are examined under severe delay constraints in Japan. A new concept of an ATM-native teleprotection system employing time synchronous systems such as GPS is also proposed.

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Section: Payload (48 Bytes) Header 5 Bytes)mentioning

confidence: 98%

ATM transmissions of microprocessor-based current differential teleprotection signals

Serizawa

Shimizu²,

Fujikawa³

et al. 1999

IEEE Trans. Power Delivery

Self Cite

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“…Additionally, the existing Synchronous Digital Hierarchy (SDH) communication network is strained by limited routing resources. This issue particularly affects new energy plants and load stations at the periphery of the SDH network, which suffer from considerable impact [1]. The time delay in the 4th generation mobile communication technology (4G) wireless private networks is notable [2], necessitating an evolution towards 5th generation mobile communication technology (5G) networking [3,4].…”

Section: Introductionmentioning

confidence: 99%

Research on Improvement of Data Synchronization Method for Distribution Network Differential Protection Based on 5G

Fan,

Wang,

Cheng

et al. 2024

Energies

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To enhance the reliability of traditional current protection systems in the evolving landscape of future power grids, this paper proposes a differential protection data synchronization approach that leverages satellite and 5G network timing. This method addresses the risk of inadvertent operation due to 5G communication jitter. It employs the BeiDou satellite system for synchronizing the timing of 5G base stations and terminals. This synchronization extends to the 5G terminal and the protection device, thereby mitigating time deviations caused by air interface delays and reducing the 5G network’s end-to-end delay by approximately 4 ms on average. A simulation was conducted to assess the reliability and effectiveness of the proposed method under normal satellite signal conditions. The results indicated a significant improvement in protection accuracy, with the method reducing the protection activation time by approximately 5–7 ms compared to the 5G timing data synchronization method. This advancement offers technical support for the safe and stable operation of new power systems.

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“…However, renewable output tends to be uncertain and intermittent, which puts forward higher requirements for the time synchronization precision of PV-grid connection and regulation [4][5]. Traditional methods leverage wireless communication or optical fibers for time synchronization, both of which possess high costs and low coverage in the distribution network [6][7]. Therefore, it is urgent to investigate a power line communication (PLC) wide coverage-appropriated time synchronization technology to satisfy the rigid requirements for renewable energy services such as PV-grid connection.…”

Section: Introductionmentioning

confidence: 99%

Group consensus protocol-based power line communication wide coverage time synchronization

Shi

Yang

et al. 2023

International Conference on Optoelectronic Information and Functional Materials (OIFM 2023)

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High-precision time synchronization of each node in the distribution network is a critical technology supporting for distributed photovoltaic (PV) services. However, traditional time synchronization method has high costs and low coverage applying in the distribution network, which hinders the implementation of distributed PV services. Aiming at the above problems, we propose a group consensus protocol-based power line communication (PLC) wide coverage time synchronization method. First, the PLC wide coverage clock synchronization architecture is illustrated. Then, a group consensus protocol-based clock synchronization algorithm is proposed to achieve fast convergence and high precision time synchronization. Finally, the effectiveness of the proposed algorithm is verified by simulation.

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SDH-based time synchronous system for power system communications

Cited by 14 publications

References 7 publications

ATM transmissions of microprocessor-based current differential teleprotection signals

ATM transmissions of microprocessor-based current differential teleprotection signals

Research on Improvement of Data Synchronization Method for Distribution Network Differential Protection Based on 5G

Group consensus protocol-based power line communication wide coverage time synchronization

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