MICROPROCESSOR BASED PROTECTIVE RELAYING

Md. Shamsur Rahman  Chowdhury; Zhen Zhang  Jiang

doi:10.53808/KUS.2000.2.1.23-30-se

Authors

Md. Shamsur Rahman Chowdhury Electronics and Communication Engineering Discipline, Khulna University, Khulna-9208, Bangladesh
Zhen Zhang Jiang Department of Electrical Engineering, South East University, Nanjing, P. R. China

DOI:

https://doi.org/10.53808/KUS.2000.2.1.23-30-se

Keywords:

Protective relaying; Solenoid power circuit; Reactor

Abstract

Protective relaying using microprocessors is becoming popular mainly due to it's speed and reliability. In this paper, protection against overheating of a reactor has been designed and discussed.The Intel 8088 microprocessor has been used and the program has been designed in Turbo C language. Each heater coil of the reactor is connected with a circuit breaker. When temperature in a chamber of the reactor exceeds a set value (the safety limit) the corresponding circuit breaker will trip to protect the chamber from damage due to overheating. In our particular reactor, there are ten chambers. In this paper, protection for only one chamber has been designed and discussed. Programs were written for Intel 8088 microprocessor but were executed in a computer using Intel 80386 microprocessor. It is not a problem because Intel 80 family members are upwardly compatible.

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References

Chowdhury, M.S.R., 1996. Program design for a distributed control system using 80386 and 8088 microprocessors in assembly and C languages and interfacing between the two languages. Senior Advance Course Project Report, South East University, Nanjing, P.R. China.

Murray, III W.H. and Pappas, C.H., 1986. 80386/80286 Assembly Language Programming. McGraw Hill, Osborne, pp. 1-6, 153-180.

Winer, R.S., 1983. Turbo C at Any Speed. John Wily and Sons Inc., USA, pp. 1-17.