Quels sont les bénéfices d'un contrôleur PV + diesel pour votre projet solaire hybride ?
- By Khanya Gubangxa
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Introduction:
Qu'est-ce qu'un microgrid? - définition
First, let’s quickly explain what a microgrid is. A microgrid can be described as an independent system including various distributed energy resources (grid, solar, battery, Genset, hydro…) responsible for the production and delivery of electricity. To increase resilience in the face of an unstable grid, many C&I buildings install backup diesel generators that kick in when the grid is down. This configuration helps increase reliability, which is crucial for the end user.
However, adding a solar system for EPCs (engineering, procurement and construction companies) can be complex: without a controller, unplanned outages affect solar production, because when the grid is down, the Solar production is interrupted and cannot protect the generators. The main challenge for an EPC is to maximize solar production during power outages while taking into account the requirements of backup generators.
More information on the subject:
“What is a solar hybrid microgrid?”
“What is a solar hybrid system?”
Combiner l'énergie solaire à un système de générateurs diesel pour remédier au manque de fiabilité du réseau
Some developing countries, such as South Africa and India, face extended hours of load shedding and complete blackouts. Some Western countries like the United States are facing the same difficulties, as we have seen in recent years with power outages in Texas or interruptions caused by fires in California.
To address this problem, many facility owners have begun implementing solar systems to increase local generation and reduce their reliance on diesel generators. The objective is to ensure a continuous power supply through the use of solar panels in addition to generators.
In this case, these structures must find a solution that allows the solar panels to operate in parallel with the diesel generators in order to meet the energy demand in the most optimal way possible.
Solar-diesel hybrid solar systems cannot operate properly without a controller. It is necessary to use a solar-diesel (SD) controller to provide power, especially during a power outage. It allows the solar panels and the generator to operate simultaneously.
In the case of microgrids, it is also imperative that a single energy source forms the network. This means that this component sets the voltage and frequency of the entire network. When multiple power sources are connected together, multiple protection components are placed in the network to prevent problems such as low frequency, current flow distortion, and power flow reversal. The SD controller is essential in such scenarios because it detects which energy source forms the network (grid or diesel generators).
In the event of a breakdown, the SD controller reduces photovoltaic production to ensure a minimum load of the generator set (around 30% of rated power) and prevent the risk of current reversal.
When solar generation capacity is added to reduce fuel consumption without adding a storage battery, the output power of the PV inverters must be controlled to allow optimal operation with the generators while avoiding power inversion of the solar energy to generators.
Contrôleur solaire-diesel pour sites hybrides
Elum Energy propose ePowerControl SD spécialement conçu pour une intégration sûre et simple d’une centrale de production d’énergie solaire avec un ou plusieurs générateurs diesels. Le contrôleur présente une grande compatibilité avec différents équipements solaires et offre à ses utilisateurs une interface intuitive incluant des fonctions de collecte de données.
Il assure une charge minimale des groupes électrogènes. En fonction de la demande et de l’offre, le contrôleur SD restreint les onduleurs solaires afin d’empêcher les groupes électrogènes de fonctionner à faible charge. De plus, le contrôleur peut assurer la limitation d’injection dans le réseau principal. Ainsi, les besoins du site sont satisfaits le plus efficacement possible et l’énergie solaire n’est pas injectée dans le réseau principal.
Pour optimiser l’utilisation de votre micro-réseau et maximiser les performances et la rentabilité de votre système, faites appel à l’un de nos experts en micro-réseaux.
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