A method of estimating the output fluctuation of many photovoltaic power generation systems dispersed in a wide area

Murata, Akinobu; Yamaguchi, Hiroshi; Otani, Kenji

doi:10.1002/eej.20723

Cited by 101 publications

(69 citation statements)

References 3 publications

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“…On the other hand, as far as the study of power fluctuations is concerned, the number of studies made is even more limited. The literature available only includes measurements with a 5 minute resolution on 100 PV systems (243 kWp in total) in Germany [5]; data taken at 10 second and 1 minute intervals at a fixed 4.6 MWp system and measurements taken every 10 minutes at three 100 kWp plants in Arizona (USA) [6] and, finally, data recorded with a one minute resolution over a 3 month period on 52 PV systems in Japan, with an approximate mean power per system of 3.2 kWp [7].…”

Section: Experimental Set-upmentioning

confidence: 99%

Power output fluctuations in large PV plants

Marcos¹,

Marroyo²,

Lorenzo³

et al. 2012

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Abstract. The power generated by large photovoltaic (PV) plants is of an intermittent nature, due to cloud passage, which can create considerable fluctuations in output. Therefore, if the penetration of PV power in the overall electricity system is high enough, these fluctuations could have a serious effect on the quality and safety of the power supply. This article aims to characterise these fluctuations and to look at the smoothing effect of the PV plant size and that of the geographical dispersion of the PV plants.

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Section: Experimental Set-upmentioning

confidence: 99%

Power output fluctuations in large PV plants

Marcos¹,

Marroyo²,

Lorenzo³

et al. 2012

REPQJ

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“…As a consequence, each plant compensates the fluctuations occurred in another plant separated by sufficient distance. In (Murata and Otani, 1997;Murata et al, 2009), simulated and measured PV power data are used for analysing the smoothing effect of distributing a large number of PV plants along a country-level region. They obtained a correlation between output power fluctuations and the distances between the locations of the plants.…”

Section: Methods To Mitigate Pv Power Fluctuationsmentioning

confidence: 99%

“…In previous works, procedures have been proposed to characterise PV power fluctuations and to size batteries for complying with a certain power ramp rate limitation. Despite part of the fluctuations can be smoothed by geographically dispersing PV plants (Lave et al, 2012;Marcos et al, 2012;Murata et al, 2009), strict grid regulations demand buffering capabilities to individual PV plants. By analysing PV powers fluctuations statistically, in (Perez and Hoff, 2013;van Haaren et al, 2015) the fluctuations mitigation is addressed by means of energy storage systems.…”

Section: Chapter 3 Sizing Of Batteries Applied To Pv Power Fluctuatiomentioning

confidence: 99%

Storage size for PV power ramp rate control

Puente¹

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Este tribunal acuerda otorgar la calificación de: EL PRESIDENTE LOS VOCALES EL SECRETARIORealizado el acto de defensa y lectura de la Tesis en Madrid, el día 3 de Julio de 2017. A mis padres. "El hombre rinde el máximum de su capacidad cuando adquiere la plena conciencia de sus circunstancias. Por ellas comunica con el universo." "¡La circunstancia! ¡Circum-stantia! ¡Las cosas mudas que están en nuestro próximo derredor! Muy cerca, muy cerca de nosotros levantan sus tácitas fisonomías con un gesto de humildad y de anhelo, como menesterosas de que aceptemos su ofrenda y a la par avergonzadas por la simplicidad aparente de su donativo. Y marchamos entre ellas ciegos paraellas, fija la mirada en remotas empresas, proyectados hacia la conquista de lejanas ciudades esquemáticas." José Ortega y Gasset AgradecimientosUna tesis doctoral, desde su comienzo hasta el fin, es un camino personal extraño, con tramos llanos pero también escarpados, que culminan en una de las montañas más altas de tu vida. Como todo camino similar, uno se plantea varias veces, incluso desde antes de emprenderlo y a lo largo de todo el trayecto, si tomarlo o ir por otro lado; si seguir adelante o volver tranquilamente hacia abajo; si ir por el camino más fácil, o ya que estás, subir por el menos transitado. Pero cuando se escriben estas palabras, significa que ya estás arriba y que nada de lo que pensaste en el camino importa. La cumbre está delante.Este camino ha sido posible, sobre todo, a la gente que me ha acompañado en todos los aspectos del mismo.Para empezar quiero agradecer a Luis por darme la oportunidad de emprenderlo y las facilidades para llevarlo a cabo, por capitanear la tesis de forma efectiva y compartir su conocimiento conmigo. También quiero dar las gracias a Eduardo por poner a nuestra disposición tanta sabiduría y experiencia. A ambos, siempre les estaré agradecido por orientarme y enseñarme a enfocar en lo esencial de la energía fotovoltaica y del pensamiento científico. Después de los capitanes, vienen los marineros, todos mis compañeros de trabajo, desde el más veterano hasta los proyectandos, por contribuir de una forma u otra a este trabajo. Aquí incluyo, cómo no, a los compañeros navarros, cuyo trabajo además sirve de base para parte del mío. Gracias a la ayuda técnica y moral de todos estos amigos de ambos grupos, con algún chisme de por medio, el camino ha sido más llevadero.Por último, el camino no puede entenderse sin el soporte personal de los que te llevan a cuestas en los peores momentos. En esos instantes siempre están los mismos a tu lado. Ya estaban en caminos anteriores y mucho más difíciles que una simple tesis y gracias a ellos otra vez se ha conseguido. Gracias a mis padres Pedro y Jone por todo; esta tesis en realidad es suya. A toda mi familia en general por estar siempre ahí. A mi hermano por acompañarme a descubrir desde pequeños que somos ingenieros, a mi tío por inspirarnos a serlo, a mis tías por apoyarme y entenderme a la perfección y a Eva porque sin ella ni su paciencia esto no hubiera llegado a ...

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“…In 2009, Murata, Yamaguchi and Otani [34] investigated the geographic correlation between PV output fluctuations in different places in Japan and found that PV variability depends on the data recording interval and the physical distance between PV units. Larger distances and higher data resolution will result in lower variability correlation.…”

Section: Pv Variability Study In the Literaturementioning

confidence: 99%

“…Larger distances and higher data resolution will result in lower variability correlation. Hoff and Perez [35] and Mills and Wiser [36] in 2010 expanded the relationship developed by Murata, Yamaguchi and Otani [34] by including the number of PV systems and the dispersion factor, and formulating them into equations for PV output variability prediction.…”

Section: Pv Variability Study In the Literaturementioning

confidence: 99%

Design of a Smart Management System for Future Distribution Networks with High Photovoltaic Penetration

Hossain¹

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In the twenty-first century, renewable energy capacity is growing exponentially every year. The photovoltaic (PV) system is the most dominant technology among all renewable technologies in terms of dispersion at consumer levels. The main point of distinction between this system and a traditional generation unit is that these PV systems are largely connected at a low voltage level and are spread sporadically throughout electricity distribution systems. With season, time of day and weather, PV power generation varies quite widely to an extent that existing PV systems are not prepared for. In the past, electricity distribution systems were designed only for downstream power flow as the power generation was considered to come from a common source. Because of the rapid expansion of network elements, huge amounts of PV generation and heavier unbalanced load, it is forecast that PV power generation will burden the network more than it can manage at the present time. For example, at different times of the day, generation may exceed the amount of load to be served due to the distributed generation units in the network. Therefore, the system could face a large amount of reverse power flow. This situation will put substantial pressure on electrical equipment that maintain the networks and gradually affect the high voltage (HV) networks.A large number of research studies have attempted to find a solution to this issue. There are works on controlling different devices such On Load Tap Changer (OLTC), Static VAR Compensator (SVC), and Step Voltage Regulator (SVR) etc. However, most of these have not been studied with models of compensation devices appropriate for real-world three-phase four-wire unbalanced systems. The effects of rapid PV generation variation need to be properly investigated. Efficient coordination is required that considers the timely operation of the mentioned devices according to their response celerity. Coordination also needs to maintain optimum cost, optimum voltage levels, and long-term stability. Therefore, an optimization technique is required to maintain the coordinated management system. In this research thesis, the work starts with developing an engine and modelling compensation devices to investigate probable critical voltage standard non-compliant scenarios with PV penetration and variation. Evaluating these scenarios considering voltage violation conditions and demarcating points of interest are the next vital steps. Algorithms will be proposed for a smart system to counter issues and attain optimality for both short and long term along with the time responsiveness factor of the devices. These algorithms would need to be assessed by different simulation strategies. This thesis will consider all pertinent matters and undergo rigorous ii assessment to ensure practicality. Along with these aforementioned features, expandability will be kept in mind for future development. Academia and power industries will benefit from the studies on the realistic behaviour of devices, unbalanced network s...

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A method of estimating the output fluctuation of many photovoltaic power generation systems dispersed in a wide area

Cited by 101 publications

References 3 publications

Power output fluctuations in large PV plants

Power output fluctuations in large PV plants

Storage size for PV power ramp rate control

Design of a Smart Management System for Future Distribution Networks with High Photovoltaic Penetration

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