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RESUMEN
Con frecuencia se admite que la tasa de potencia pico fotovoltaica (FV) no debe exceder del 20% al 30% de la potencia máxima consumida en una salida de BT. Como consecuencia, la capacidad de inserción de energía fotovoltaica sigue siendo bastante baja. Por dicha razón el distribuidor de energía corre el riesgo de tener un problema de sobretensiones si excediera este límite. RESA, distribuidor belga y Odit-e, una startup francesa, han probado una nueva solución que permite, como mínimo, duplicar la capacidad de inserción de FV en las salidas a la red. Se realizó una experimentación en un área cuya capacidad de inserción FV estaba al límite y sujeta a problemas de debidos a sobretensiones. Los resultados muestran que ha sido posible abordar de manera eficiente los problemas de tensiones existentes, así como la identificación de inserción adicional significativa.

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RESUMEN
La topología es la piedra angular para el análisis de las redes de baja tensión. Debido a que la información actual proviene de un GIS que a menudo no está actualizado que almacena la mayor parte de la información sobre las características y la ubicación de los activos del distribuidor de energía. Su contenido no es completo y lo suficientemente preciso como para realizar el modelo de la red de baja tensión.
Al proporcionar la conexión contador – fase – línea – transformador, la topología resultante facilitará la solución para una mejor gestión de la operativa.
Dicha carencia, puede corregirse gracias al análisis de datos recibidos de los contadores inteligentes. El documento presenta los métodos disponibles para recuperar la topología, sus pros y sus contras, y evalúa un nuevo algoritmo utilizando la curva de tensión de cada contador en un área geográfica definida

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ABSTRACT
Low Voltage networks characteristics are poorly known. To enable smarter planning, a proper knowledge of the network topology is essential: meter-to-substation mapping, and meter-to-feeder/phase within a substation. Odit-e has developed an innovative method for topology identification based on smart meters data, avoiding the installation of any additional sensors. The method had been designed using datasets collected in various places in Europe, and is made to be robust to Low Voltage specificities. An experimentation has been conducted jointly by Odit-e and EDPD to validate this method in an operational environment. Results are promising: considering the hazards related to real data collection within various types of networks, the obtained topology is very accurate. The next step will be a large-scale validation, with thousands of meters.

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ABSTRACT
To prevent photovoltaic productions from affecting voltage profiles, Distribution System Operators are currently limiting their insertion in Low Voltage networks. However, various mitigation solutions exist. This paper presents an experimentation that has been conducted jointly by Odit-e and RESA, aiming to quantify the benefits of two of these solutions (on-load tap changer and network balancing) on the network hosting capacity. The studied network had been subject to voltage excursions due to photovoltaic productions before implanting the solutions. The hosting capacity, being difficult to compute without a precise knowledge of the network characteristics, has been computed using an innovative planning tool developed by Odit-e, that only requires smart meters data. Both of the studied mitigation solutions have solved the voltage excursions, and the network hosting capacity has increased by 67%. However, random photovoltaic insertion generating huge voltage imbalances, the balancing method proved to be more appropriate while being much easier to implement, and should therefore be chosen first. Once the network is balanced, the on-load tap changer is very suitable.

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ABSTRACT
The value of the flexibilities available in an electricity system is often considered for the only sake of balancing production and consumption in a variable  environment. For instance, a system with a high penetration of unpredictable renewable energy production requires energy flexibility to keep the balance.
However, the activation of a flexibility has not only an impact on the balance of the whole system but also and in particular on a local scale, on the electrical network itself. For example, the activation of an energy flexibility to increase consumption – with the goal of absorbing high production of renewable energy facilities in one part of the grid – is changing the state of the grid at the location where the energy is being consumed. This impact on the state of the grid can be positive or negative if done blindly.
One of the aims of the GIFT project is to address the question of this local impact and the possibility for a Distribution System Operator (DSO) to access the flexibility market. It would benefit from it purchasing flexibilities to solve network issues. There are two demonstration sites in the GIFT project, namely the Grytøya island, in Norway, and the island of Procida, in Italy.
This paper addresses the implementation in the Norwegian demonstration site.

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ABSTRACT
Energy decentralization is encouraged through customer empowerment within the formation of Energy Communities. The key enabling role of DSO to support Energy Communities is however hampered by a lack of LV grid digitization and flexibility. The H2020 IElectrix project (2019-2022), co-funded by the European Commission, is devoted to solving this issue. Five DSOs (E.DIS, Enedis, Energie Güssing, E.ON EED, Tata Power Delhi Distribution Limited) have joined with innovative solution providers and research centres, to demonstrate the combined roles of distribution grid innovations in different regulatory systems (Austria, Germany, Hungary and India). This paper focuses on innovative solutions for the Indian system, with a power sector sustenance majorly dependent on the cash-flow coming from its distribution sector. Nevertheless, this is the weakest link of the power sector and faces major challenges such as the increase in the power purchase cost, high Aggregate Technical and Commercial (AT&C) losses, lack of cost-reflective tariffs and the energy transition. With the government’s impetus towards promoting clean energy and the intermittent nature of the renewables and the variability of charging electric vehicles, this requires real-time demand supply management and network flexibility. The Indian SHAKTI pilot, located in Delhi, aims to demonstrate relevant technologies involving prosumer support.

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Nuestros proyectos

Utilit-e es una operación realizada con la asistencia de las inversiones para el futuro del estado francés, confiadas a ADEME.

  • Estos proyectos han recibidos financiación del programa de investigación e innovación Horizonte 2020 de la Unión Europea en virtud de los acuerdos de subvención No 824410 (GIFT), 824392 (IElectrix) and 872525 (BD4OPEM).
Odit-e France

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