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Kut opterećenja sinkronog generatora pogonska je veličina koja daje direktnu informaciju o položaju radne točke generatora s obzirom na granicu stabilnosti. Budući da rad elektroenergetskog sustava karakteriziraju velike promjene pogonskog stanja rada sinkronog generatora, a prijelaz iz jednog u drugo pogonsko stanje najčešće prate značajne dinamičke promjene kuta opterećenja. Zbog toga je za upravljanje i zaštitu sinkronog generatora vrlo važno poznavati kut opterećenja. U ovome radu opisan je način mjerenja kuta opterećenja pomoću enkodera montiranog na osovini rotora sinkronog generatora i pomoću logičkog kontrolera NI CompactRIO-9022 s dodatnim modulom NI-9411. Osim toga dato je još nekoliko primjera mjerenja kuta opterećenja direktnim i indirektnim metodama. U sklopu ovoga rada izrađen je algoritam za mjerenje kuta opterećenja sinkronog generatora, a izrađen je pomoću programskog alata LabVIEW i modula LabVIEW Real-Time. Izrađeni algoritam detaljno je opisan i na kraju rada su prikazani rezultati simulacije istog. The load angle of a synchronous generator is a drive quantity that provides direct information about the position of the generator operating point with respect to the stability limit. Since the operation of the power system is characterized by large changes in the operating state of the synchronous generator, the transition from one to another operating state is usually followed by significant dynamic changes in the load angle. Therefore, it is very important to know the load angle to control and protect the synchronous generator. This paper describes a method of measuring the load angle using an encoder mounted on the rotor shaft of a synchronous generator and using a logic controller NI CompactRIO-9022 with an additional module NI-9411. Additionally, several other examples of direct and indirect load angle measurements are provided. As part of this work, an algorithm for measuring the load angle of a synchronous generator was developed using the LabVIEW software tool and the LabVIEW Real-Time module. The developed algorithm is described in detail and at the end of the paper, the results of the simulation are shown. |
