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    Wyświetlanie 1-6 z 6
    Tytuł:
    A single-point method based on distortion power for the detection of harmonic sources in a power system
    Autorzy:
    Stevanović, D.
    Petković, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/220846.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    distortion power
    harmonic pollution source detection
    power meter
    Opis:
    This paper describes a new and efficient method for quantifying and detection of the source of distortion caused by a single customer in a case when many other customers exist in a power grid. It is based on measuring distortion power, a component of apparent power that only exists with a nonlinear load. Different definitions for distortion power calculation are investigated. All these definitions show without doubt that the proposed method is feasible. Moreover, this method allows to develop fair and reliable billing schemes for controlling harmonic pollution. Measurement and simulation results confirm the effectiveness and applicability of the method. The proposed solution is suitable for software/hardware upgrade of existing electronic power-meters.
    Źródło:
    Metrology and Measurement Systems; 2014, 21, 1; 3-14
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A current decomposition-based method for computationally efficient implementation of power resolution meters in non-sinusoidal single-phase systems
    Autorzy:
    Balci, M. E.
    Hocaoglu, M. H.
    Powiązania:
    https://bibliotekanauki.pl/articles/220775.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    power resolutions
    non-sinusoidal conditions
    single-phase systems
    power meter
    Opis:
    For non-sinusoidal single-phase systems, the classical apparent power has been divided into various components using different techniques. These power resolutions generally aim at to provide a tool for the accurate determination of the maximum power factor achievable with a passive compensator and to measure the load's nonlinearity degree. This paper presents a current decomposition-based methodology that can be employed for computationally efficient implementation of the widely recognized non-sinusoidal power resolutions. The proposed measurement method and the original expressions of the power resolutions are comparatively evaluated by considering their computational complexity. The results show that the proposed method has a significant advantage in terms of computational efficiency for the simultaneous measurements of the powers when compared with the original expressions. Finally, in this paper, a PC-based power meter is developed using the proposed measurement method via the LabVIEW programme.
    Źródło:
    Metrology and Measurement Systems; 2013, 20, 2; 263-274
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Load management via AMI and risk of overloading the power system
    Autorzy:
    Billewicz, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1812166.pdf
    Data publikacji:
    2012
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    smart meter
    load management
    overloading the power system
    Opis:
    One advantage of AMI is the ability to Demand Side Management. The ability to control the client devices (Load management) is one of the key function of AMI. Some customers with smart meters and Time-of-Use (TOU) tariffs pay different amounts for their electricity over three (or two) different time periods. They can program their smart appliances. Customer's devices are switched-on when energy is cheaper, and switched-off when it is more expensive. If clients on a massive scale will run their devices at a time when energy is cheaper, then it would affect the bulk electric grid.
    Źródło:
    Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały; 2012, 66, 32; 384-388
    1733-0718
    Pojawia się w:
    Prace Naukowe Instytutu Maszyn, Napędów i Pomiarów Elektrycznych Politechniki Wrocławskiej. Studia i Materiały
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of broadband power line communication module for automatic meter reading
    Autorzy:
    Chen, Xia
    Liu, Ling
    Powiązania:
    https://bibliotekanauki.pl/articles/949869.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    automatic meter reading
    low-power consumption
    long-distance transmission
    power line communication
    Opis:
    Low-power consumption and long-distance transmission are two problems that have to be solved by the application of broadband power line communication for the automatic meter reading system. To reduce the power consumption of the communication module, based on the analysis of the composition of the power consumption, some methods are proposed. From the communication chip level and the module circuit level, the design scheme of low-power consumption is given. To solve the problem of transmission distance, a frequency band of 2.44 MHz~5.6 MHz is used as the main working frequency band. The communication module supports multiple frequency bands. Using this feature, the optimal frequency band is adaptively selected for communication and automatic switching, which further improve the transmission distance. Field application shows that the above methods effectively decrease the power consumption of the communication module and extend the transmission distance.
    Źródło:
    Archives of Electrical Engineering; 2020, 69, 4; 771-780
    1427-4221
    2300-2506
    Pojawia się w:
    Archives of Electrical Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Testing Of energy meters under three-phase determined and random nonsinusoidal conditions
    Autorzy:
    Olencki, A.
    Mróz, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/221328.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    energy meter testing
    nonsinusoidal conditions
    energy calibrators
    electrical power standards
    automatic calibration procedure
    Opis:
    Electric energy meters are designed to account energy under sinusoidal and nonsinusoidal conditions, because both, old and new standards for energy meters require testing their accuracy under different conditions. The latest EN 50470 standard increases the range of meter testing under nonsinusoidal conditions, introducing new shapes of test signals such as the phase fired waveform or the burst fired waveform. This paper discusses calibration problems of electronic revenue energy meters for direct connection and for connection through current transformers, and it proposes a new calibration procedure which reproduces normal operating conditions better: three-phase configurations of measurement systems, load range during meter testing or shapes of test signals. Recently, modern Electrical Power Standards, also known as Power Calibrators, enable automatic testing of various types of electrical devices, including electricity meters in their normal operating conditions. This article presents examples of single and multi position fully automatic test systems, which employ Power/Energy Calibrator from Poland as the precision source with programmed waveforms of three phase voltages up to 560 V and currents up to 120 A conforming to EN 50470, or with random waveforms generated by PC software random wave generator. Measurement uncertainty of the energy meters under different nonsinusoidal conditions using a test system with reference to accuracy of the power calibrator or to the reference meter, are discussed. Comparative analysis of test results for different shapes of voltage and current signals is presented in the conclusions of this paper.
    Źródło:
    Metrology and Measurement Systems; 2014, 21, 2; 217-232
    0860-8229
    Pojawia się w:
    Metrology and Measurement Systems
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Random forest based power sustainability and cost optimization in smart grid
    Autorzy:
    Durairaj, Danalakshmi
    Wróblewski, Łukasz
    Sheela, A.
    Hariharasudan, A.
    Urbański, Mariusz
    Powiązania:
    https://bibliotekanauki.pl/articles/23966623.pdf
    Data publikacji:
    2022
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    smart grid
    las losowy
    internet rzeczy
    zarządzanie energią
    uczenie maszynowe
    licznik inteligentny
    random forest
    Internet of things
    power management
    machine learning
    smart meter
    priority power scheduling
    Opis:
    Presently power control and management play a vigorous role in information technology and power management. Instead of non-renewable power manufacturing, renewable power manufacturing is preferred by every organization for controlling resource consumption, price reduction and efficient power management. Smart grid efficiently satisfies these requirements with the integration of machine learning algorithms. Machine learning algorithms are used in a smart grid for power requirement prediction, power distribution, failure identification etc. The proposed Random Forest-based smart grid system classifies the power grid into different zones like high and low power utilization. The power zones are divided into number of sub-zones and map to random forest branches. The sub-zone and branch mapping process used to identify the quantity of power utilized and the non-utilized in a zone. The non-utilized power quantity and location of power availabilities are identified and distributed the required quantity of power to the requester in a minimal response time and price. The priority power scheduling algorithm collect request from consumer and send the request to producer based on priority. The producer analysed the requester existing power utilization quantity and availability of power for scheduling the power distribution to the requester based on priority. The proposed Random Forest based sustainability and price optimization technique in smart grid experimental results are compared to existing machine learning techniques like SVM, KNN and NB. The proposed random forest-based identification technique identifies the exact location of the power availability, which takes minimal processing time and quick responses to the requestor. Additionally, the smart meter based smart grid technique identifies the faults in short time duration than the conventional energy management technique is also proven in the experimental results.
    Źródło:
    Production Engineering Archives; 2022, 28, 1; 82--92
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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