Under The Conditions Of Interference Electrical Equipment Dielectric Loss Value Measurement Research Tg Delta

In today’s society in the rapid development, not only improve people’s living standard, but also promoted the economic and social development, and the great strides to continue operation, the benign circulation, is one of the conditions required power supply high stability, security, and reliable operation of the power system. To know power supply high stability, security, and reliable operation of the power system, we must grasp a macro parameters, dielectric loss Angle tangent delta (tg) or loss factor. Because a reflection is insulation tg delta within the size of the important indexes power loss, if uneven medium, actually reflect the delta tg unit volume within the medium of dielectric loss, and insulation, all sizes. Delta, as measured tg can reflect the distribution of the insulation. Which can comprehensively reflect the electric equipment of insulation, dielectric loss situation, so the delta is insulating properties test tg is one of important projects.This paper narrates the electrical equipment and its harm, the insulation fault dielectric loss of general concept, significance and the dielectric loss detection problems, on-line monitoring electrical equipment in domestic and international status of insulation and prospect. Introduces the measuring methods:dielectric loss of traditional methods and application of microcomputer dielectric loss measurement method and the dielectric loss measurement methods of new progress. Summarizes the dielectric loss measurement method and improving interference factors, improving interference factors:the accuracy of measuring tg delta value. Discuss commonly used methods to eliminate interference factors (i.e. to eliminate the shortcomings of the methods to eliminate interference, electric fields, eliminate disadvantages of method shortcomings.According to the above situation, the paper puts forward a new method of measuring and calculation, namely, then by using the superposition principle, eliminate interference weight vector operation, the real value of dielectric loss tg new methods of delta mathematical model and realization method, the new method, and systems. Finally, a new method statement in the use of on-line monitoring.