Electrical compliance of GSM-R base stations in the railway network

Združevanje Evrope poteka tudi na področju komunikacijskih in prometnih povezav, v tem okviru pa se obnavlja tudi slovensko železniško omrežje. Za vodenje in nadzor so ključne informacijske povezave med vlakovnimi kompozicijami, železniškimi postajališči in nadzornim centrom, tu pa bo eno ključnih vlog igralo omrežje mobilnih komunikacij GSM-R (GSM-Railway). Projekt izgradnje GSM-R predvideva postavitev 246 GSM-R baznih postaj, ki pa so trenutno večinoma še v gradnji. Nemoteno delovanje teh postaj je nujno za varnost in učinkovitost takšnega sistema, zato so kvalitetno projektiranje, izgradnja in vzdrževanje bistvenega pomena za dosego teh ciljev. V diplomskem delu se ukvarjam s kakovostjo opravljenih del na že zgrajenih postajah, še preden preidejo v uporabo. S pregledi smo želeli ugotoviti, ali so pri nadzoru bile odpravljene vse pomanjkljivosti, ki se v takšnem procesu vselej pojavljajo. Rezultati meritev in pregledov kažejo na to, da je načrtovanje bilo ustrezno, šepa pa pri izvedbi in predvsem pri nadzoru. Izvedba je očitno ustrezna tam, kjer so dela opravili ljudje z izkušnjami z delom na omrežju Slovenskih železnic. Očitno iz varčevalnih razlogov na delu inštalacij sodelujejo tudi monterji, ki ne poznajo zahtev, veljavnih za tovrstne objekte. Neustrezne vrednosti ponikalnih upornosti lahko pripišemo specifičnosti terena, napake pri vezavah so pa stvar (ne)nadzora. Dejstvo, da bo nekoč sistem brezžičnih komunikacij in vodenja na Slovenskih železnicah dejansko deloval, lahko pripišemo bolj ali manj neznanim posameznikom, ki delajo na tem projektu in so zame eni od junakov današnjega časa.European projects aiming to consolidate all aspects of social and technological bonds between different regions, is also happening in the field of communication and transport. In this context, the reconstruction and modernization of Slovene railway network is currently underway. The key role in managing and controlling this system are communications between trains, railway stations and the control center. This shall be achieved with the new network of mobile communication, GSM-R. The core of this network will consist of 246 GSM-R base stations, which are currently under construction. The smooth functioning of these stations is essential for the safety and efficiency, so effective development, construction and maintenance are essential to achieving required quality of such a system. The thesis is dealing with the quality of the work put in building these base stations. The reviews of the already built GSM-R base stations determine, whether the control did its job in eliminating all shortcomings that always occur on such a project. With the measurements done on just a few GSM-R stations, I can make an assumption only on the data collected. So, this data shows us that the design is adequate. Less so is the implementation and in there was no sign of an overview by the investors. Installations are clearly appropriate where the works were carried out by people with experience working for Slovene railways. It is obvious, that for cost reducing reasons there are several electricians working on GSM-R installations, who do not have the required know how for works on such facilities. Insufficient grounding resistance can be attributed to the specifics of the terrain, but mistakes in cable and wire connections are primarily an error of inadequate (nonexistent) control. The fact that this Slovene railways system of wireless communications actually might work, I can attribute to more or less unknown individuals working on this project. I consider these people the heroes of our time