Browsing by Keyword "Distributed Energy Resources (DER)"
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Item Experiences and conclusions towards a harmonized process for the certification of equipment connected to the electricity network: Islanding prevention(2007) De Muro, Asier Gil; Perea, Eugenio; Zabala, Eduardo; POWER ELECTRONICS AND SYSTEM EQUIPMENT; DIGITAL ENERGY; Tecnalia Research & InnovationManufacturers of equipment to be connected to the electricity network, in the new liberalized market, have to evidence compliance with the new requirements that are expected to be asked. In the same way, certification laboratories have to undertake a great investment to purchase new measurement equipment and train personnel to continue to fulfil their aim as accredited certification bodies in the electricity sector and, more concretely, in the Distributed Energy Resources interconnection, Power Quality and EMC domains. This paper describes some conclusions based on the experiences of LABEIN-Tecnalia, as a well known accredited certification entity, with the objective to illustrate the efforts carried out, mainly in the field of islanding prevention. The paper starts from a description of the accreditation and compliance processes, it features a new laboratory specification, and then analyzes the first experimental tests and results to show the capabilities of the laboratory, in order to verify that a system connected to the electricity grid is compliant with the islanding requirements.Item Noise Sources, Effects and Countermeasures in Narrowband Power-Line Communications Networks: A Practical Approach: A practical approach(2017-08) López, Gregorio; Moreno, José Ignacio; Sánchez, Eutimio; Martínez, Cristina; Martín, Fernando; POWER ELECTRONICS AND SYSTEM EQUIPMENTThe integration of Distributed Generation, Electric Vehicles, and storage without compromising the quality of the power delivery requires the deployment of a communications overlay that allows monitoring and controlling low voltage networks in almost real time. Power Line Communications are gaining momentum for this purpose since they present a great trade-off between economic and technical features. However, the power lines also represent a harsh communications medium which presents different problems such as noise, which is indeed affected by Distributed Generation, Electric Vehicles, and storage. This paper provides a comprehensive overview of the types of noise that affects Narrowband Power Line Communications, including normative noises, noises coming from common electronic devices measured in actual operational power distribution networks, and noises coming from photovoltaic inverters and electric vehicle charging spots measured in a controlled environment. The paper also reviews several techniques to mitigate the effects of noise, paying special attention to passive filtering, as for being one of the most widely used solution to avoid this kind of problems in the field. In addition, the paper presents a set of tests carried out to evaluate the impact of some representative noises on Narrowband Power Line Communications network performance, as well as the effectiveness of different passive filter configurations to mitigate such an impact. In addition, the considered sources of noise can also bring value to further improve PLC communications in the new scenarios of the Smart Grid as an input to theoretical models or simulations.