FIELD: electrical equipment.;SUBSTANCE: invention relates to the electrical equipment. Proposed is the spacecraft with the long service life power system sustainability reserves remote monitoring method, which consists in the fact that in the process of monitoring to the system an active signal is supplied, assessing the electrical energy quality indicators, determining these indicators degree of compliance with standard values, predicting the electrical energy quality expected indicators, characterized by the fact, that the specified impact is carried out periodically remotely with the normalized by current and time signals, after each impact performing the synchronized with the impact recording and operational storage of information on the electric power quality and the subsequent data transfer for ground processing and the database formation.;EFFECT: technical result consists in increase in the electric power system unstable operation occurrence time determining reliability and accuracy for the timely taking measures on operation sustainability improvement or the spacecraft operation stopping.;1 cl, 2 dwg
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