Abstract
Characteristic analysis of transient electromagnetic disturbance data is very important. In this paper, the time-domain and frequency-domain characteristics of transient electromagnetic disturbance caused by switching operations in substations are analyzed. Two methods are adopted in time-domain analysis. One method is histogram and the other one is normality test. An appropriate procedure for the normality test is proposed. Furthermore, the method used in frequency- domain analysis is to obtain overall envelope. These statistical characteristic analysis methods are showed to be of great value in analyses of the measured samples. The simulation results showed that these methods are effective.
Highlights
With the increasing requirements of the electromagnetic environment, electromagnetic compatibility problems have become the focus of research in electrical and electronic field
Electromagnetic compatibility problems appear most substation which is the main object of study, transient electromagnetic disturbance caused by lightning strike, fault and switching operation through the coupled radiation conduction on the formation of interference two equipment, cause two equipment damage [2] [3]
Transient electromagnetic disturbance produced by switching operations in substation to analyze and study, according to the features of time domain and frequency domain for transient electromagnetic disturbance of the actual measurement data was analyzed, the overall characteristics of transient electromagnetic disturbance is obtained
Summary
With the increasing requirements of the electromagnetic environment, electromagnetic compatibility problems have become the focus of research in electrical and electronic field. Electromagnetic compatibility problems appear most substation which is the main object of study, transient electromagnetic disturbance caused by lightning strike, fault and switching operation through the coupled radiation conduction on the formation of interference two equipment, cause two equipment damage [2] [3]. Transient electromagnetic disturbance produced by switching operations in substation to analyze and study, according to the features of time domain and frequency domain for transient electromagnetic disturbance of the actual measurement data was analyzed, the overall characteristics of transient electromagnetic disturbance is obtained. Because the data is difficult to obtain, the number of samples is small, this paper focuses on the small sample statistical theory was proposed based on the normality test method of time domain characteristics. Based on the practical consideration, according to the statistical results of the evaluation of the method used by the meaning and practical value
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