Statično preizkušanje distančne zaščite z računalniškim programom TestZLab [Elektronski vir]
Polajžer, Boštjan, 1972- ; Arcet, Davorin
V prispevku je opisan računalniški program za statično preizkušanje distančne zaščite TestZLab. Obravnavani program omogoča generiranje sekundarnih preizkusnih signalov v COMTRADE formatu. Možni so ...trije načini preizkušanja: preizkušanje s konstantnimi toki, preizkušanje s konstantnimi napetostmi in napredno preizkušanje. Slednje temelji na fazorskem modelu preprostega radialnega omrežja, ki je opisan z impedanco voda, impedanco izvora, upornostjo okvare in z bremenskim tokom. Uporaba TestZlab-a je prikazana na primeru sekundarnega preizkušanja numeričnega zaščitnega releja ABB REL 521. Dobljeni rezultati kažejo, da je napredno preizkušanje distančne zaščite bolj ustrezno od preizkušanja s konstantnimi toki ali s konstantnimi napetostmi.
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