An Embedded System in Smart Inverters for Power Quality and Safety Functionality
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Author
Real Calvo, Rafael Jesús
Pallarés López, Víctor
González Redondo, Miguel Jesús
Moreno-García, Isabel
González de la Rosa, Juan José
Moreno-Muñoz, A.
Publisher
MDPIDate
2016Subject
Embedded systemSmart grid
Smart inverter
Distributed energy resource
Power quality
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Show full item recordAbstract
The electricity sector is undergoing an evolution that demands the development of a
network model with a high level of intelligence, known as a Smart Grid. One of the factors accelerating
these changes is the development and implementation of renewable energy. In particular, increased
photovoltaic generation can affect the network’s stability. One line of action is to provide inverters
with a management capacity that enables them to act upon the grid in order to compensate for these
problems. This paper describes the design and development of a prototype embedded system able to
integrate with a photovoltaic inverter and provide it with multifunctional ability in order to analyze
power quality and operate with protection. The most important subsystems of this prototype are
described, indicating their operating fundamentals. This prototype has been tested with class A
protocols according to IEC 61000-4-30 and IEC 62586-2. Tests have also been carried out to validate
the response time in generating orders and alarm signals for protections. The highlights of these
experimental results are discussed. Some descriptive aspects of the integration of the prototype in an
experimental smart inverter are also commented upon.