Power supply of electric power sistem in the area of Trbovlje

V diplomski nalogi sem raziskal dolgoročni razvoj razdelilnega omrežja in transformacije na elektroenergetskem območju Trbovlje. Raziskava temelji na dolgoročni prognozi obremenitev za območje Elektro Ljubljana d.d., DE Trbovlje in upošteva dejstva, ki sledijo v bližnji prihodnosti. Ta dejstva so načrtovani obratovalni napetostni prehod s 35 kV in 10 kV na enotni 20 kV napetostni nivo ter ukinitev primarnega napajanja RTP 35/10 kV Trbovlje iz RTP 110/35 kV TET, ki se odstrani zaradi potrebe po dodatnem prostoru v bližini Termoelektrarne Trbovlje. Pri raziskavi različnih variant napajanja EO Trbovlje sem se opiral na kriterije za načrtovanje DO določene s strani EIMV. Te kriterije je potrebno upoštevati, saj zagotavljajo kvaliteto in kontinuiteto napajanja. Predvsem so pomembni kriteriji za padce napetosti in dopustne obremenitve elementov omrežja. Za izračun in analizo različnih variant napajanja EO Trbovlje sem uporabljal programski paket Gredos, ki se zelo pogosto uporablja v elektrodistribucijskih podjetjih. Rezultati so pokazali, da varianta napajanja z RP 20 kV Trbovlje ne izpolnjuje kriterijev za načrtovanje DO in bo že v letu 2020 potrebno zgraditi RTP 110/20kV Vodenska z enim transformatorjem. Ta varianta izpolnjuje kriterije za načrtovanje DO do leta 2035, pozneje pa bo potrebno namestiti še dodatni transformator in vzankati RTP 110/20 kV Vodenska na 110 kV napetostnem nivoju. To velja za delovanje Cementarne Trbovlje s polno močjo, to je 10 MVA. Pri delovanju Cementarne Trbovlje z močjo 500 kVA, kar se kaže kot najbolj verjetna možnost, pa so rezultati pokazali, da je možno EO Trbovlje napajati z varianto RP 20 kV Trbovlje, vse do leta 2040.In this thesis I investigated the long-term development of the distribution network and the transformation in the electricity area Trbovlje. The study is based on the long-term prognosis for the load area of Elektro Ljubljana d.d., DE Trbovlje and takes into account the facts that follow in the near future. These facts are planned operating voltage transition from 35 kV and 10 kV on a single 20 kV voltage level and the abolition of primary power for distribution transformer substation 35/10 kV Trbovlje from the distribution transformer substation 110/35 kV TET, which is removed because of the need to have additional space close to Thermal power plant Trbovlje. In the study of different variants of powering electricity area Trbovlje I have relied on the criteria for planning the distribution network set by EIMV. These criteria should be considered, since they provide the quality and continuity of supply. The most important are criteria for voltage drops and allowable load of network elements. For the calculation and analysis of the different variants of powering electricity area Trbovlje I used a software package Gredos, which is widely used in electricity distribution companies. The results showed that a variant of a power supply with distribution substation 20 kV Trbovlje does not meet the criteria for planning the distribution network. Already in the year 2020 will be needed to build a distribution transformer substation 110/20 kV Vodenska with one transformer. This variant meets the criteria for planning the distribution network until the year 2035. Later it will be necessary to install an additional transformer and looping distribution transformer substation 110/20 kV Vodenska at 110 kV. This applies to the operation of the Cement factory Trbovlje with full power, that is 10 MVA. In operation of Cement factory Trbovlje with the power of 500 kVA, which is seen as the most likely option, the results showed that it is possible to power electricity area Trbovlje with a variant of the distribution substation 20 kV Trbovlje until the year 2040