Elektrilevi OÜ jaotusvõrgu madalpingekilpide ülevaatusandmete analüüs

Töö eesmärk oli koostada Elektrilevi OÜ jaotusvõrgus kasutatavate madalpingekilpide kohta kogutud ülevaatusandmete põhjal ülevaade neil kilpidel tuvastatud puudustest. Töö esimeses osas on põgusalt tutvustatud ettevõtet ennast, tema madalpingevõrku ja täpsemalt uuritavaid kilpe.

Analüüsi sisulises osas on uuritud võrguinforakenduse andmebaasi väljavõtteid, mille andmed on kogutud perioodil 01.01.2014 kuni 31.12.2023. Töös on esitatud kokkuvõtted peamiselt tuvastatud puudustest, puuduste tuvastamissagedusest kilpide paigaldusaastate lõikes ja ka kilbitüüpide lõikes. Peale selle on uuritud kuivõrd andmebaasi andmed kilpide seadmekaartide osas vastavad olukorrale looduses. Lisaks on esile tõstetud mõned märkimisväärsed puudused, mida kilpidel on tuvastatud.

Ülevaatusandmete põhjal planeeritakse ettevõttes võrguobjektide hooldustöid ja seetõttu on tähtis lähteandmete usaldusväärsus ja kontrollitavus. Analüüsis selgub, et andmekvaliteedi osas on veel ruumi arenguks. Võrguinforakenduse abil on raske saada terviklikku pilti seadmete seisukorrast. Samas nähtub, et ülevaatustel kogutud andmete kvaliteet on ajas oluliselt paranenud.

Seadmete seisukorra kohta midagi üllatavat töös ei leitud. Kinnitust leidis tõsiasi, et töökorraldust on viimase kümne aasta jooksul juhitud suunas, mis on avaldanud paigaldustööde kvaliteedile positiivset mõju.

The title of this thesis is „Analysis of Inspection Data of Low-voltage Distribution Cabinets in the Distribution Network of Elektrilevi Ltd“. The purpose of this thesis was to create an analytic overview of defects found during the inspection of low voltage distribution cabinets. Elektrilevi is planning on doing most of the maintenance work required to eliminate defects in the grid with it’s own workforce and such analyses are at present a topic of interest for the company. A brief introduction of the company itself, its distribution grid and the distribution cabinets is given in the introductory part of the paper.

In the main part of the paper, a descriptive analysis is constructed using data tables exported from the database of the company’s network information system. The inspection data itself was collected between 01.01.2014 and 31.12.2023. Various summaries are presented: most common defects overall, the frequency of defects found over the years and the frequency of defects found across the many types of cabinets in use. An evaluation of the quality of the data regarding the nameplates of the cabinets is also done. The evaluation checks whether the data about the manufacturer and the type of the cabinets are in accordance with the situation in the field. In addition, some of the noteworthy defects are described separately and more thoroughly.

The data within the database is used as a basis for planning future maintenance work. For this reason, it is most important for the data to be reliable and verifiable. According to the analysis there is still room for improvement regarding the quality of the data and acquiring a complete overview of the condition of the devices in the grid using only the network information system can be complicated. On the other hand, it can be concluded that the quality of the data has indeed improved over the years.

Regarding the condition of the devices, not much new information was found during the analysis. Rather, the findings suggest that the quality of installation work has improved greatly during the past five to ten years.