Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Decentralized power generation: New Megawatt testing equipment for over-voltage ride through

27.11.2019

To keep pace with the latest changes to grid codes and testing standards the facilities of Fraunhofer IEE‘s laboratory SysTec have recently been upgraded by an over-voltage-ride-through (OVRT) test container. The new testing equipment is designed to analyze the dynamic behavior of wind turbines, photovoltaic inverters and combined heat and power units during short time over voltages of the supply voltage. Since the revision of grid codes in fall 2018 riding through short-term voltage swells now also became a requirement for generating plants installed in regional and local distribution grids.

“Decentralized power generators have to cope with disturbances in the power system in a supporting an reliable way“, explains Dr. Philipp Strauß, deputy head of the institute and head of the division Systems Engineering and Distribution Grids at Fraunhofer IEE in Kassel. The institute performs the measurement of generating plants according to the requirements of the interface to the power grid for the socalled type-specific unit certificate. This certificate is prepared for each type, e.g. a combined heat and power unit (CHP) or a photovoltaic system, and precedes the certification of complete systems. If required, the modelling for the simulation of the entire plant can also be carried out. “Our laboratories are used for developing components and systems as well as for final accredited tests”, describes Strauß.


New mobile OVRT testing equipment of Fraunhofer IEE

Fraunhofer IEE | Miliushchanka


Interior view – One of the three single-phase testing transformers

Fraunhofer IEE | Miliushchanka

According to the recent revision of the German VDE grid codes the laboratories of Fraunhofer IEE were now completed with an over-voltage-ride-through (OVRT) test equipment for a maximum power of 6 MVA. Since 2011 Fraunhofer IEE is testing power generators concerning grid compliance including their fault-ride-through (FRT) behavior.

“The transformer-based, mobile test container was successfully developed in cooperation with KoCoS Engineering GmbH”, explains IEE project leader Nils Schäfer. The new OVRT test container allows generation of short-term over-voltage events of up to 140 % of nominal voltage. The OVRT as well as the UVRT container are designed for mobile utilization and can be deployed in field measurements. Both have a power capacity of 6 MVA and can be installed in the medium voltage level at 20 kV or 10 kV nominal voltage. The new testing equipment was successfully set in operation in summer 2019; first tests have been accomplished with CHP units.

Beneath testing of grid compliance and studies on grid dynamics, Fraunhofer IEE offers
services regarding conceptual design, development, implementation and operation of mobile testing equipment. Together with partners, services range from support and supervision to turnkey solutions.

Background

The Fraunhofer IEE Test Center for Smart Grids and Electromobility (SysTec) in Fuldatal-Rothwesten (12 km north of Kassel) comprises an outdoor area of around 80,000 square meters with configurable distribution network sections and three laboratory areas for testing low and medium-voltage converters, combined heat and power plants, electrical machines and network equipment, systems for integrating electric vehicles and power storage devices into the network, and portable FRT test containers (UVRT and OVRT) for on-site use. SysTec includes the network integration (PNI) test laboratory, a test field for hybrid systems, a test laboratory for electrical machines and a hardware-in-the-loop (HiL) laboratory.

Wissenschaftliche Ansprechpartner:

Dr.-Ing. Gunter Arnold
Phone +49 561 7294-244
E-Mail: gunter.arnold(at)iee.fraunhofer.de
Dipl.-Ing. Nils Schäfer
Phone +49 561 7294-244
E-Mail: nils.schaefer(at)iee.fraunhofer.de

Weitere Informationen:

https://www.iee.fraunhofer.de/en/schnelleinstieg-wirtschaft/themen/testing_
http://grid_characteristics.html
https://www.iee.fraunhofer.de/en/laboratories/inverter-lab.html

Uwe Krengel | Fraunhofer-Institut für Energiewirtschaft und Energiesystemtechnik IEE

More articles from Materials Sciences:

nachricht Tiny quantum sensors watch materials transform under pressure
13.12.2019 | DOE/Lawrence Berkeley National Laboratory

nachricht Light, strong, and tough: Researchers at the University of Bayreuth discover unique polymer fibres
13.12.2019 | Universität Bayreuth

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Virus multiplication in 3D

Vaccinia viruses serve as a vaccine against human smallpox and as the basis of new cancer therapies. Two studies now provide fascinating insights into their unusual propagation strategy at the atomic level.

For viruses to multiply, they usually need the support of the cells they infect. In many cases, only in their host’s nucleus can they find the machines,...

Im Focus: Cheers! Maxwell's electromagnetism extended to smaller scales

More than one hundred and fifty years have passed since the publication of James Clerk Maxwell's "A Dynamical Theory of the Electromagnetic Field" (1865). What would our lives be without this publication?

It is difficult to imagine, as this treatise revolutionized our fundamental understanding of electric fields, magnetic fields, and light. The twenty original...

Im Focus: Highly charged ion paves the way towards new physics

In a joint experimental and theoretical work performed at the Heidelberg Max Planck Institute for Nuclear Physics, an international team of physicists detected for the first time an orbital crossing in the highly charged ion Pr⁹⁺. Optical spectra were recorded employing an electron beam ion trap and analysed with the aid of atomic structure calculations. A proposed nHz-wide transition has been identified and its energy was determined with high precision. Theory predicts a very high sensitivity to new physics and extremely low susceptibility to external perturbations for this “clock line” making it a unique candidate for proposed precision studies.

Laser spectroscopy of neutral atoms and singly charged ions has reached astonishing precision by merit of a chain of technological advances during the past...

Im Focus: Ultrafast stimulated emission microscopy of single nanocrystals in Science

The ability to investigate the dynamics of single particle at the nano-scale and femtosecond level remained an unfathomed dream for years. It was not until the dawn of the 21st century that nanotechnology and femtoscience gradually merged together and the first ultrafast microscopy of individual quantum dots (QDs) and molecules was accomplished.

Ultrafast microscopy studies entirely rely on detecting nanoparticles or single molecules with luminescence techniques, which require efficient emitters to...

Im Focus: How to induce magnetism in graphene

Graphene, a two-dimensional structure made of carbon, is a material with excellent mechanical, electronic and optical properties. However, it did not seem suitable for magnetic applications. Together with international partners, Empa researchers have now succeeded in synthesizing a unique nanographene predicted in the 1970s, which conclusively demonstrates that carbon in very specific forms has magnetic properties that could permit future spintronic applications. The results have just been published in the renowned journal Nature Nanotechnology.

Depending on the shape and orientation of their edges, graphene nanostructures (also known as nanographenes) can have very different properties – for example,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

The Future of Work

03.12.2019 | Event News

First International Conference on Agrophotovoltaics in August 2020

15.11.2019 | Event News

Laser Symposium on Electromobility in Aachen: trends for the mobility revolution

15.11.2019 | Event News

 
Latest News

Supporting structures of wind turbines contribute to wind farm blockage effect

13.12.2019 | Physics and Astronomy

Chinese team makes nanoscopy breakthrough

13.12.2019 | Physics and Astronomy

Tiny quantum sensors watch materials transform under pressure

13.12.2019 | Materials Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>