Search results for: ROCOF

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ROCOF</title> <meta name="description" content="Search results for: ROCOF"> <meta name="keywords" content="ROCOF"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none navbar-toggler ml-auto" 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class="input-group"> <i class="fas fa-search"></i> <input type="text" class="search-query" name="q" placeholder="Author, Title, Abstract, Keywords" value="ROCOF"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 4</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: ROCOF</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4</span> Development of PSS/E Dynamic Model for Controlling Battery Output to Improve Frequency Stability in Power Systems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Dae-Hee%20Son">Dae-Hee Son</a>, <a href="https://publications.waset.org/abstracts/search?q=Soon-Ryul%20Nam"> Soon-Ryul Nam</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The power system frequency falls when disturbance such as rapid increase of system load or loss of a generating unit occurs in power systems. Especially, increase in the number of renewable generating units has a bad influence on the power system because of loss of generating unit depending on the circumstance. Conventional technologies use frequency droop control battery output for the frequency regulation and balance between supply and demand. If power is supplied using the fast output characteristic of the battery, power system stability can be further more improved. To improve the power system stability, we propose battery output control using ROCOF (Rate of Change of Frequency) in this paper. The bigger the power difference between the supply and the demand, the bigger the ROCOF drops. Battery output is controlled proportionally to the magnitude of the ROCOF, allowing for faster response to power imbalances. To simulate the control method of battery output system, we develop the user defined model using PSS/E and confirm that power system stability is improved by comparing with frequency droop control. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=PSS%2FE%20user%20defined%20model" title="PSS/E user defined model">PSS/E user defined model</a>, <a href="https://publications.waset.org/abstracts/search?q=power%20deviation" title=" power deviation"> power deviation</a>, <a href="https://publications.waset.org/abstracts/search?q=frequency%20droop%20control" title=" frequency droop control"> frequency droop control</a>, <a href="https://publications.waset.org/abstracts/search?q=ROCOF%20%28rate%20of%20change%20of%20frequency%29" title=" ROCOF (rate of change of frequency)"> ROCOF (rate of change of frequency)</a> </p> <a href="https://publications.waset.org/abstracts/70548/development-of-psse-dynamic-model-for-controlling-battery-output-to-improve-frequency-stability-in-power-systems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/70548.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">412</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3</span> Islanding Detection of Wind Turbine by Rate of Change of Frequency (ROCOF) and Rate of change of Power (ROCOP) Method</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Vipulkumar%20Jagodana">Vipulkumar Jagodana</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Recently the use of renewable sources has increased, these sources include fuel cell, photo voltaic, and wind turbine. Islanding occurs when one portion of grid is isolated from remaining grid. Use of the renewable sources can provide continuous power to isolated portion in islanding condition. One of the common renewable sources is wind generation using wind turbine. The efficiency of wind generation can be increased in combination with conventional sources. When islanding occurs, few parameters change which may be frequency, voltage, active power, and harmonics. According to large change in one of these parameters islanding is detected. In this paper, two passive methods Rate of Change of Frequency (ROCOF) and Rate of change of Power (ROCOP) have been implemented for islanding detection of small wind-turbine. Islanding detection of both methods have been simulated in PSCAD. Simulation results show at different islanding inception angle response of ROCOF and ROCOP. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=islanding" title="islanding">islanding</a>, <a href="https://publications.waset.org/abstracts/search?q=adopted%20methods" title=" adopted methods"> adopted methods</a>, <a href="https://publications.waset.org/abstracts/search?q=PSCAD%20simulation" title=" PSCAD simulation"> PSCAD simulation</a>, <a href="https://publications.waset.org/abstracts/search?q=comparison" title=" comparison"> comparison</a> </p> <a href="https://publications.waset.org/abstracts/52214/islanding-detection-of-wind-turbine-by-rate-of-change-of-frequency-rocof-and-rate-of-change-of-power-rocop-method" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/52214.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">225</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2</span> Impact Study on a Load Rich Island and Development of Frequency Based Auto-Load Shedding Scheme to Improve Service Reliability of the Island</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Md.%20Shafiullah">Md. Shafiullah</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Shafiul%20Alam"> M. Shafiul Alam</a>, <a href="https://publications.waset.org/abstracts/search?q=Bandar%20Suliman%20Alsharif"> Bandar Suliman Alsharif</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Electrical quantities such as frequency, voltage, current are being fluctuated due to abnormalities in power system. Most of the abnormalities cause fluctuation in system frequency and sometimes extreme abnormalities lead to system blackout. To protect the system from complete blackout planned and proper islanding plays a very important role even in case of extreme abnormalities. Islanding operation not only helps stabilizing a faulted system but also supports power supplies to critical and important loads, in extreme emergency. But the islanding systems are weaker than integrated system so the stability of islands is the prime concern when an integrated system is disintegrated. In this paper, different impacts on a load rich island have been studied and a frequency based auto-load shedding scheme has been developed for sudden load addition, generation outage and combined effect of both to the island. The developed scheme has been applied to Khulna-Barisal Island to validate the effectiveness of the developed technique. Various types of abnormalities to the test system have been simulated and for the simulation purpose CYME PSAF (Power System Analysis Framework) has been used. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=auto%20load%20shedding" title="auto load shedding">auto load shedding</a>, <a href="https://publications.waset.org/abstracts/search?q=FS%26FD%20relay" title=" FS&FD relay"> FS&FD relay</a>, <a href="https://publications.waset.org/abstracts/search?q=impact%20study" title=" impact study"> impact study</a>, <a href="https://publications.waset.org/abstracts/search?q=island" title=" island"> island</a>, <a href="https://publications.waset.org/abstracts/search?q=PSAF" title=" PSAF"> PSAF</a>, <a href="https://publications.waset.org/abstracts/search?q=ROCOF" title=" ROCOF"> ROCOF</a> </p> <a href="https://publications.waset.org/abstracts/7890/impact-study-on-a-load-rich-island-and-development-of-frequency-based-auto-load-shedding-scheme-to-improve-service-reliability-of-the-island" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/7890.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">457</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1</span> Power Angle Control Strategy of Virtual Synchronous Machine: A Novel Approach to Control Virtual Synchronous Machine</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Shishir%20Lamichhane">Shishir Lamichhane</a>, <a href="https://publications.waset.org/abstracts/search?q=Saurav%20Dulal"> Saurav Dulal</a>, <a href="https://publications.waset.org/abstracts/search?q=Bibek%20Gautam"> Bibek Gautam</a>, <a href="https://publications.waset.org/abstracts/search?q=Madan%20Thapa%20Magar"> Madan Thapa Magar</a>, <a href="https://publications.waset.org/abstracts/search?q=Indraman%20Tamrakar"> Indraman Tamrakar</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Renewable energies such as wind turbines and solar photovoltaic have gained significance as a result of global environmental pollution and energy crises. These sources of energy are converted into electrical energy and delivered to end-users through the utility system. As a result of the widespread use of power electronics-based grid-interfacing technologies to accommodate renewable sources of energy, the prevalence of converters has expanded as well. As a result, the power system's rotating inertia is decreasing, endangering the utility grid's stability. The use of Virtual Synchronous Machine (VSM) technology has been proposed to overcome the grid stability problem due to low rotating inertia. The grid-connected inverter used in VSM can be controlled to emulate inertia, which replicates the external features of a synchronous generator. As a result, the rotating inertia is increased to support the power system's stability. A power angle control strategy is proposed in this paper and its model is simulated in MATLAB/Simulink to study the effects of parameter disturbances on the active power and frequency for a VSM. The system consists of a synchronous generator, which is modeled in such a way that the frequency drops to an unacceptable region during transient conditions due to a lack of inertia when VSM is not used. Then, the suggested model incorporating VSM emulates rotating inertia, injecting a controllable amount of energy into the grid during frequency transients to enhance transient stability. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=damping%20constant" title="damping constant">damping constant</a>, <a href="https://publications.waset.org/abstracts/search?q=inertia%E2%80%93constant" title=" inertia鈥揷onstant"> inertia鈥揷onstant</a>, <a href="https://publications.waset.org/abstracts/search?q=ROCOF" title=" ROCOF"> ROCOF</a>, <a href="https://publications.waset.org/abstracts/search?q=transient%20stability" title=" transient stability"> transient stability</a>, <a href="https://publications.waset.org/abstracts/search?q=distributed%20sources" title=" distributed sources"> distributed sources</a> </p> <a href="https://publications.waset.org/abstracts/141846/power-angle-control-strategy-of-virtual-synchronous-machine-a-novel-approach-to-control-virtual-synchronous-machine" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/141846.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">207</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/WASET-16th-foundational-anniversary.pdf">WASET celebrates its 16th foundational 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Search results for: ROCOF