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The story of the City of Espoo - Launch of cooperation and pilot

The cooperation between Espoo and Otso started in May 2024 with the first meeting, where the OtsoSmart device was presented. Already at that time, experts in Espoo recognised the key advantage of the device: the same device can be used to correct both inductive and capacitive
reactive power.

In the summer of 2024, the cooperation progressed to a pilot when Otso-Demo was installed on 8 July 2024 in the main centre of the Leppävaara swimming hall. During the test period of about a week, it was found that the device works effectively in compensating for both forms of reactive power and produces remotely usable measurement data for monitoring properties.

After the pilot, the installation was dismantled and the device was moved to the next site, but the successful results of the demo quickly led to Espoo's first equipment order and the expansion of cooperation to a property portfolio survey based on power quality measurements.

25%

Per cent savings in energy costs with the elimination of reactive power fees.

40%

One percent less unplanned downtime in critical processes.

Expansion, equipment development and current situation

A total of ten audits were carried out during the mapping phase. In four locations, new equipment was not recommended, as either the removal of the old compensation equipment was sufficient or the loads were already close to the power factor of 1. Based on the measurement results, we proceeded to equipment recommendations and deliveries at six locations.

At the same time, Otso's product family expanded with active device development, as OtsoPro devices were also introduced, which, in addition to reactive power, correct current distortion (harmonics 3–13). The equipment was delivered, installed and commissioned smoothly at the Espoo sites. According to Espoo's experts, the new generation of solutions makes it possible to fix problems with a single device without overlapping systems.

25%

Per cent savings in energy costs with the elimination of reactive power fees.

40%

One percent less unplanned downtime in critical processes.

The cooperation has continued to expand. At the moment, Espoo has about a dozen Otso devices in use, and a total of about thirty measurements have been made. In connection with the measurements, the condition of the existing compensation devices and blocking coils has also been inspected, and based on the results, more equipment has been budgeted for the sites where the need is greatest.

The latest project in Espoo had 500kVari anti-coil batteries, which had all kinds of repairs in their service history, the worst of which: "The contactors of the 2nd and 5th steps are defective. The 2nd staircase was taken out of use due to the risk of fire, otherwise ok."

After such a maintenance report, the question remains when there is a risk of fire on the next stairs. The compensators were removed and replaced with OTSOPRO-RACK-100K.

25%

Per cent savings in energy costs with the elimination of reactive power fees.

40%

One percent less unplanned downtime in critical processes.

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"The installation and delivery of Otso went completely according to plan, even though the location was challenging. From the beginning, the device has worked as hoped and promised."
HKFoods

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Modular power quality systems: harmonic control, reactive power compensation and remote monitoring. A modern solution to the real problems of the electricity network

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