Sampling frequency self-adapting software algorithm in protection relay measure and control system

Author

Wang, Fei ; Mi, Zeng-qiang ; Yang, Qi-xun

Author_Institution

Key Lab. of Power Syst. Protection, North China Electr. Power Univ., Baoding

fYear

2008

fDate

6-9 April 2008

Firstpage

1889

Lastpage

1893

Abstract

Frequency spectrum leakage caused by synchronous error in nonsynchronous sampling system reduces the accuracy of frequency spectrum analysis and harmonic measurement. A sampling frequency self-adapting software algorithm in protection relay measure and control system is presented in this paper. The sampling frequency self-adapting software algorithm obtained the actual signal frequency fairly accurately by calculating the sampling data from protection relay measure and control system, and adjusted the sampling time interval according to the frequency which was calculated by the self- adapting software algorithm. The process of the software algorithm design is introduced, simulation and analysis are discussed. The results of simulation and analysis show that this software algorithm can improve the accuracy of frequency spectrum analysis and harmonic measurement for power system signal, and the algorithm can be realized easily.

Keywords

power system analysis computing; power system harmonics; power system protection; relay protection; software engineering; frequency self-adapting software algorithm; frequency spectrum leakage; harmonic measurement; nonsynchronous sampling system; power system measurement; protection relay; Algorithm design and analysis; Control systems; Frequency measurement; Harmonic analysis; Power system harmonics; Protection; Protective relaying; Sampling methods; Software algorithms; Software measurement; Frequency spectrum leakage; harmonic analysis; protection relay measure and control system; sampling frequency; self-adapting; synchronous error;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Utility Deregulation and Restructuring and Power Technologies, 2008. DRPT 2008. Third International Conference on

Conference_Location

Nanjuing

Print_ISBN

978-7-900714-13-8

Electronic_ISBN

978-7-900714-13-8

Type

conf

DOI

10.1109/DRPT.2008.4523715

Filename

4523715