10.14489/td.2018.01.pp.012-016

2018, 01 January

DOI: 10.14489/td.2018.01.pp.012-016

Shakhnin V. A., Baghdasaryan M. K.
THE DIAGNOSTICS OF HIGH VOLTAGE EQUIPMENT IN THE MODES OF STABILIZATION OF PARTIAL DISCHARGES PARAMETERS
(pp. 12-16)

Abstract. The majority of the damage of power transformers is associated with a reduction of the electric strength of oilbarrier insulation and its breakdown in the near to the high voltage winding of the oil channel. The electricalnoise methods of diagnostics of high voltage equipment according to the parameters of partial discharges (PD) can identify the insulation defects in the early stages of development. There are known methods of diagnostics under operating voltage by measuring the characteristics of the PD with inductive and capacitive sensors. However, these methods do not provide the required selectivity of discharges inside and outside of the diagnosed equipment, has insufficient accuracy and does not possess the necessary visualization of control results. In addition, when you use this method to register the characteristics of the PD with widely used in the diagnosis of high voltage equipment digital recorders occurs difficult to remove the contradiction between the speed and accuracy of registration. The diagnose mode with constant current value of the apparent charge of PD at the level corresponding to the minimum error measurement parameters of the PD was proposed in the article. The study of the peculiarities of diagnostics in the proposed mode was carried out with a help of installation that was made in the Engineering Center of the Vladimir State University on the basis of HVPD LONGSHOT system of the company HIGH VOLTAGE PARTIAL DISCHARGE LTD (UK). The inductive (HFCT) and capacitive (TEV) sensors of this company were applied. The graphs of the dependencies of PD parameters in the against applied voltage obtained by using this installation on a laboratory high-voltage transformer and in the diagnosis of one of the phases of the autotransformer ATDСTN–200000/220/110/6 are shown in the article. The most informative diagnostic parameters for those dependencies were revealed.

Keywords: high voltage equipment, partial discharges, diagnostic modes, the apparent charge.

+ - About the Authors Click to collapse

V. A. Shakhnin (Vladimir State University named after A. G. and N. G. Stoletov, Vladimir, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.
M. K. Baghdasaryan (National Polytechnic University of Armenia, Erevan, Armenia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

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