Wszystkie pola: time relay - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Implementation of IEC 61850 power protection tester in Linux environment
Autorzy:: Kurek, K.
Nogal, Ł.
Kowalik, R.
Januszewski, M.
Powiązania:: https://bibliotekanauki.pl/articles/202357.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: implementation in real time
power systems
protective relay testing
digital control systems
IEC 61850
Opis:: Software power protection tester implemented in a real-time operating system (RTOS) might replace the conventional testing setups in IEC 61850 protection systems. This paper describes an open power protection testing platform. Linux RT capabilities related to runtime environment for such a tester are examined and OS latency sources are identified and evaluated. An algorithm for a multithreaded tester operation is proposed, including Sampled Values (SV) publisher, GOOSE input/output and time synchronization. SV and GOOSE services implemented in RT Linux environment are evaluated in accordance with IEC 61850‒5 transfer time requirements. Linux PTP time synchronization service of two similar systems controlling its electrical ports is evaluated in different synchronization scenarios. The developed tester is compared to an equivalent conventional setup during the test of IED over-current function. The conducted tests show that the Linux implementation of power protection tester in the case of scheduler latency, time synchronization accuracy and transfer time all meet the requirements of IEC 61850.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 4; 689-696
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Pneumatic sequential control systems
Pneumatyczne układy sterowania sekwencyjnego
Autorzy:: Luft, M.
Krzysztoszek, K.
Podsiadły, D.
Pietruszczak, D.
Cioć, R.
Powiązania:: https://bibliotekanauki.pl/articles/312151.pdf
Data publikacji:: 2013
Wydawca:: Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:: układy pneumatyczne
sterowanie pneumatyczne
program FluidSim-P
siłowniki
licznik zdarzeń
przekaźnik czasowy
zawór drogowy
zawór ciśnieniowy
pneumatic control system
FluidSim-P program
counter of occurrences
time relay
distance valve
pressure valve
FluidSim
Opis:: The paper presents laboratory workstations TP 101 and TP 102 by FESTO which are used for the investigations and assembly of pneumatic components and systems. The paper shows the architecture and work of several pneumatic components, such as: the counter of occurrences, time relay, distance valve and pressure valve. Pneumatic control sequential systems together with cyclograms of cylinder's work were designed with the use of the FluidSim-P program.
Artykuł jest prezentacją stanowiska laboratoryjnego TP 101 oraz TP 102 firmy FESTO do badania i montażu elementów i układów pneumatyki. Przedstawiono budowę i działanie kilku elementów pneumatycznych: licznika zdarzeń, przekaźnika czasowego, zaworu drogowego oraz zaworu ciśnieniowego. Wykorzystując program FluidSim-P zaprojektowano sekwencyjne układy sterowania pneumatycznego wraz z cyklogramami pracy siłowników.
Źródło:: Autobusy : technika, eksploatacja, systemy transportowe; 2013, 14, 3; 713-722
1509-5878
2450-7725
Pojawia się w:: Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Time-slot based architecture for power beam-assisted relay techniques in CR-WSNs with transceiver hardware inadequacies
Autorzy:: Umer, Mushtaq Muhammad
Jiang, Hong
Zhang, Qiuyun
Manlu, Liu
Muhammad, Owais
Powiązania:: https://bibliotekanauki.pl/articles/27311438.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: cognitive radio WSNs
energy harvesting
DF relaying
relay selection schemes in WSNs
hardware inadequacy in WSNs
wireless sensor networks
zbieranie energii
bezprzewodowa sieć czujników
WSN
sieci radia kognitywnego
przekaz DF
bezprzewodowe sieci sensoryczne
Opis:: Over the past two decades, numerous research projects have concentrated on cognitive radio wireless sensor networks (CR-WSNs) and their benefits. To tackle the problem of energy and spectrum shortfall in CR-WSNs, this research proposes an underpinning decode-&-forward (DF) relaying technique. Using the suggested time-slot architecture (TSA), this technique harvests energy from a multi-antenna power beam (PB) and delivers source information to the target utilizing energy-constrained secondary source and relay nodes. The study considers three proposed relay selection schemes: enhanced hybrid partial relay selection (E-HPRS), conventional opportunistic relay selection (C-ORS), and leading opportunistic relay selection (L-ORS). We present evidence for the sustainability of the suggested methods by examining the outage probability (OP) and throughput (TPT) under multiple primary users (PUs). These systems leverage time switching (TS) receiver design to increase end-to-end performance while taking into account the maximum interference constraint and transceiver hardware inadequacies. In order to assess the efficacy of the proposed methods, we derive the exact and asymptotic closed-form equations for OP and TPT & develop an understanding to learn how they affect the overall performance all across the Rayleigh fading channel. The results show that OP of the L-ORS protocol is 16% better than C-ORS and 75% better than E-HPRS in terms of transmitting SNR. The OP of L-ORS is 30% better than C-ORS and 55% better than E-HPRS in terms of hardware inadequacies at the destination. The L-ORS technique outperforms C-ORS and E-HPRS in terms of TPT by 4% and 11%, respectively.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2023, 71, 5; art. no. e146620
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Two-Way Relaying Cooperative Wireless Networks : Resource Allocation and Performance Analysis
Autorzy:: Abrar, M.
Gui, X.
Punchihewa, A.
Powiązania:: https://bibliotekanauki.pl/articles/226891.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: relay network
relay protocol
resource allocation
two-way relaying
bidirectional relaying
Analog Network Coding
Time Division Broadcast
Opis:: Relay-based cooperative wireless networks have been widely considered one of the cost-effective solutions to meet the demands in future wireless networks. In order to maximize the overall sum-rate while maintaining proportional fairness among users, we investigate different resource allocation algorithms in two-way relay networks with analog network coding (ANC) protocol and time division broadcast (TDBC) protocol. The algorithms investigated are different from traditional proportional fairness schemes in terms of fairness and computational complexity as we have applied Access Proportional Fairness (APF) and Minimum Rate Proportional Fairness (MRPF) along with load balancing at the relays. A MATLAB simulation has been performed and simulation results show the effectiveness of these algorithms.
Źródło:: International Journal of Electronics and Telecommunications; 2013, 59, 3; 229-235
2300-1933
Pojawia się w:: International Journal of Electronics and Telecommunications
Dostawca treści:: Biblioteka Nauki

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