2020

11
Dec

Frequency disturbance due to shutdown at the Olkiluoto nuclear power plant, Finland

On Thursday the Radiation and Nuclear Safety Authority of Finland announced a serious disruption at the Olkiluoto nuclear power plant. The disturbance led to full preparedness on the part of the authorities. As a consequence, Finland had to import 2300 MW from Sweden. It’s a lot of effect! Sweden was not much affected by this disturbance, where the frequency only

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2
Dec

Season’s Greetings

Dear customers and partners, we wish you a Merry Christmas and a Happy New Year! We are looking forward to a new and better year together in 2021, where we hope to be able to meet more frequently again. Stay safe! We support the Barncancerfonden (Children’s Cancer Foundation):

11
Nov

Ebrahim is breaking new ground with machine learning methods for power quality analysis

Unipower is offering a new product together with the startup Eneryield – an analytics report which automates the process of finding root-causes of power quality disturbances. The underlying technology builds on research made by Ebrahim Balouji (Ph.D Electrical Engineering) and Karl Bäckström (Ph.D.c Computer Science) at Chalmers University of Technology. Ebrahim has eight years of experience within data mining of

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10
Nov

Prevention of faults in the electricity grid with the help of PQ Secure

PQ Secure is often used as a tool to investigate serious incidents in the electricity grid. Alarm functions in the system also make it possible to detect and rectify faults at an early stage. Here is a recent example from one of our customers. PQ Secure alerts about recurring faults in the network where the automatic function for earth fault

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29
Sep

Norway tested a new cable – as a result 1400 MW were imported from Germany by mistake

The incident caused a frequency deviation that was registered with all our Nordic customers. Background to the incident was the new direct current cable between Norway and Germany. When it was tested, an error occurred. The mistake caused seven gas turbines to be started up in Sweden. “A dramatic event,” says a Swedish operations manager. First, the frequency in the

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18
Sep

Use your alarms in PQ Secure as watchguard

For long it has been known that harmonics are harmful to equipment and that filters are sometimes switched off or stop working. By using the alarm function for harmonic monitoring users are alerted to changes in the electrical grid. The limits can be set to any values. Thus the limits can be adapted to how the grid is normally functioning

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15
Sep

Class A compliance test carried out at METAS Switzerland

Last autumn a technical expert from the Middle East, Mr. Anil Kumar visited METAS in Switzerland to witness a compliance test of Power Quality instruments according to IEC 62586-2:2017 (Ed. 2.0) / IEC 61000-4-30:2015 (Ed. 3.0) Class A.  The METAS team explained the procedures and displayed the facilities available and showed how they carry out the verification tests. Parts of

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2
Jul

Unipower offers machine learning based power quality analysis in collaboration with the Chalmers startup Eneryield

Through a collaboration with the Chalmers startup Eneryield, which develops machine learning based methods for intelligent power quality analysis, Unipower will be offering a new type of analytics report to give insights in the work within power quality. Ebrahim Balouji and Karl Bäckström are the Chalmers researchers who have developed the technology. The product enables new functionalities for identifying root

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30
Jun

Weather changes with thunderstorms all over Sweden

Many industries were hit by unplanned stops over the weekend. In some places network disruptions led to power outages. Our Swedish Meteorological Institute SMHI issues forecasts of which regions are likely to be affected. However, since weather changes occur very quickly, it is hard to predict what damage they will actually cause. It is important in such situations to have

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27
May

Unipower featured in business TV program

For international companies wishing to enter the European market, Power Quality can be a determining factor in the choice of industrial location. However, it is not only the actual power quality that plays an important role in such decisions. It is also the detailed long-term documentation of Power Quality over several years that is crucial for the decision of where

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