Field Programmable Gate Arrays Supported Implementation of an Algorithm for Wind Turbine Operating Envelope Protection

Kompleksni mehanički sustavi, svakodnevno izloženi nepredvidljivom okolišu, imaju vrlo stroge granice rada čije kršenje dovodi do velike tehničke ili ekonomske štete. Algoritmima koji upravljaju takvim sustavima dodaju se zaštitni algoritmi koji ograničavaju upravljački signal. U radu je implementiran jedan takav algoritam zasnovan na proračunanom invarijantnom skupu korištenjem procesora i specijaliziranog pomoćnog slopovlja realiziranih na programirljivim logičkim poljima. Detaljno je opisan svaki dio pomoćnog sklopovlja te način pristupanja sklopovlju programskim kodom koji se izvodi na procesoru. Na kraju su uspoređene performanse različitih konfiguracija izvedbe i idealnog modela sustava. Iako su vrijednosti dobivenih rezultata loše, rezultati su obećavajući za korištenje FPGA čipova za implementaciju tog algoritma ili sličnih algoritama temeljenih na invarijantnom skupu. Bolji rezultati izvedbe algoritma mogu se dobiti na moćnijem sklopovlju.Complex mechanical systems, which are exposed to hostile environment every day, include very strict operating limits so as not to cause technical or economic damage. Control algorithms for these systems often require additional protective algorithms which limit the control signal that is applied to the plant. This paper describes the implementation of such protection algorithm. The algorithm is based on a pre-calculated control invariant set. The implementation uses both a microprocessor and a special coprocessor synthesized from logic fabric. Parts of the coprocessor and software drivers are described. Different configurations of the implementation are compared to the ideal model. Although the results are not as good as strict industrial environment may require, they paint a promising picture for the use of FPGA chips to implement this or similar invariant set-based algorithms. More accurate results of the implemented algorithm can be obtained with the more powerful hardware