The Design Of The Synchronous Generator Digital Excitation Regulator

WIth the development of electrical power system and the appearance of the bigmachine, the demand to the excitation regulator is higher At the same time, withthe use of the computer and big scale integrated circuit in e1ectric powef, thedigital excitation regulator will replace the analog excitation reg'Ulator.Fdriermore, the Micro-controller is more and more wtdespread, because it issma1l and special pmpose is big, Micro-controller provides the benefit for thespecial control system.The load is changing when the dynamo is normal. The effect to the dynamoexcitation magnetic field is different when the caPacity and power factor isdifferent. The intemal Anpedance voltage drop is different. To sustain the voltageof dynaxno stable, we must regUlate the excitation all the times, according to thecaPacty and the quality of load. This regUlating course must be realized throughthe amo regulate machine oIily. This system will finish the function above.The oPening uP environment of this system is very riPe. The CPU is theAT89C52, it is very cheaP. The fiJnction includes the sampling of the data,operation and control, key oPeration, disPlay Ctc.The open uP of Micro-cofltroller uses the C-51 langUage. The C-5l languaeis a kind of strUCtUr Program design language. It has the proPerty of some highlangUage and has the thection of assembly langUage. The softwar ed Clang'Uage reduces the opening uP period, and is read easily. And it is developed andincreased easily so we can use C langUage to design the large scale system with- n;satisfactory property.In some kinds of power station, the excitation system is the key machine of the dynamo working normal and electrical net stable. Now the electrical power system is developing the big and gigantic scale dynamo on the base of saving the energy and reducing the wastage, but on the base of protecting environment, from now on the small and the middle water electric power will be developed, so the auto excitation regulator fit for the small electrical power has the great market potentialities.Postgraduate: Ti Zong-liMajor: Agricultural electrization and automatizationTutor: Prof. Zhao Yu-lin...