Aging Of Polymeric Insulators Research Articles

Aging of Polymeric Insulators under Various Conditions and Environments: Another Look

Polymeric insulators have lightweight, excellent hydrophobicity and convenient transportation and installation. They are widely used in the external insulation for distribution and transmission lines. However, due to the long-term effects of pollution, ultraviolet radiation, discharge, temperature, humidity, altitude and other natural and complex environmental and service factors, the silicone rubber and other materials of polymeric insulators gradually age and lose their hydrophobicity and electrical insulation characteristics. The operability is significantly reduced, which seriously affects the safety and reliability of the power system. Hence, there is a need for assessing and evaluating the long-term aging and degradation of polymeric insulators under various operating conditions and environments. In this review, the various aging and characterization techniques of the polymeric insulators and their aging performance under the action of multiple factors are discussed. To enhance the performance of polymeric insulators, nano-coating, surface treatment and other techniques are also indicated. In addition, future potential fields that should be explored from a high-voltage electrical insulation perspective are also presented.

ADVANCED SIMULATION MODELS FOR PREDICTING ELECTRIC RESPONSE AND AGING OF NANOCOMPOSITE INDUSTRIAL INSULATION MATERIALS

Electric response of nanocomposite industrial mater ials has been investigated for all possible causes and effects of the interphase region on a variety of complex composite systems by using Interphase Power Law IPL model. Thus, this paper investigates the ef fective dielectric response of nanocomposite industrial insulation mat erials and effects of the interphase region on a variety of complex compo site systems. According to the statistical approach of failure in polymeric insulators, that leads us to predict the procedures and mechani sms of failures which occur within insulating materials, this paper illus trates the failure statistics of a life model for ac electrical aging of nanocomposite insulation industrial materials which depicts the m echanisms of electrical breakdown under high voltage electric fi elds by advanced simulation model program. Case studies are used to illustrate the way and mechanisms which mechanistic features which can be related to the parameters of the failure statistic. Realized lifetime of insulation materials can be evaluated by means of this model. Aging of polymeric insulators has been examined through various high v oltage electric fields, so the possibility of predicting the lifetime of individual specimens has been succeeded.

Aging Investigations of Polymeric Insulators: Overview and Bibliography

This article presents a comprehensive bibliographic survey pertaining to multistress and field aging of polymeric insulators.

A molecular model to evaluate the impact of aging on space charges in polymer dielectrics [comment and reply

For original paper see J.P. Crine, ibid., vol.4, pp.487-95, 1997. The original paper by Crine provides further consideration and experimental data in support of the already well-known model for the electrical/thermal/mechanical aging of polymeric insulation proposed by the same author some years ago. This paper comments on certain aspects of Crine's model. A reply by Crine is included.