Physicochemical assessment criteria for high-voltage pulse capacitors
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ERING DESIGN OF NUCLEAR PHYSICS EQUIPMENT
Physicochemical Assessment Criteria for High-Voltage Pulse Capacitors L. A. Darian* and L. Kh. Lam National Research University, Moscow Power Engineering Institute, Moscow, 111250 Russia *e-mail: [email protected] Received December 18, 2015
Abstract—In the paper, the applicability of decomposition products of internal insulation of high-voltage pulse capacitors is considered (aging is the reason for decomposition products of internal insulation). Decomposition products of internal insulation of high-voltage pulse capacitors can be used to evaluate their quality when in operation and in service. There have been three generations of markers of aging of insulation as in the case with power transformers. The area of applicability of markers of aging of insulation for power transformers has been studied and the area can be extended to high-voltage pulse capacitors. The research reveals that there is a correlation between the components and quantities of markers of aging of the first generation (gaseous decomposition products of insulation) dissolved in insulating liquid and the remaining life of high-voltage pulse capacitors. The application of markers of aging to evaluate the remaining service life of high-voltage pulse capacitor is a promising direction of research, because the design of high-voltage pulse capacitors keeps stability of markers of aging of insulation in high-voltage pulse capacitors. It is necessary to continue gathering statistical data concerning development of markers of aging of the first generation. One should also carry out research aimed at estimation of the remaining life of capacitors using markers of the second and the third generation. Keywords: High-voltage pulse capacitors, insulation degradation products, diagnostics, insulation aging, concentration of gases, criteria for evaluating the state of insulation. DOI: 10.1134/S1063778816140076
INTRODUCTION High-voltage pulse capacitors (HVPCs) are one of the principal elements of energy-physical setups which are employed in various areas of science and engineering, including nuclear physics. High requirements apply to the reliability of HVPCs, which is primarily determined by the reliability of its internal insulation. One of the main routes to provide the reliability of HVPC is the use of modern methods of diagnostics, which were developed with the assumption of the recent achievements in the field of instrumentation and analytical support. One of the relevant directions of studies in the area of the diagnostics of high-voltage insulation, including composite oil-impregnated insulation of high-voltage electrical equipment, is not only the detection of developing damage at the early stage of their development and assessment of their danger but also the prediction of the state of equipment and its residual life. The problem of evaluation of residual resource is rather difficult and is still unsolved for high-voltage oil-impregnated electrical equipment. Nevertheless, the investigation of diagnostic par
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