ABOUT THE JOURNAL EDITORIAL BOARD PEER REVIEW PROCEDURE HOW TO SUBMIT A PAPER CONTENT AND ABSTRACTS SUBSCRIPTION CONTACTS	Izvestiya NTC Edinoj energeticheskoj sistemi № 87, 2022           Content and abstracts           POWER SYSTEM OPERATION CONDITION MANAGEMENT Denisenko A. I., Smolovik S. V., Chudny V. S. Energy system dynamic frequency support by DFIG-based wind generator 5 Bannykh P. Yu., Gavrilova A. E., Pazderin A. V. Method of searching for the limiting operation conditions in a given controlled section 11 Dvorkin D. V., Novikov A. N., Novikov N. L., Suprunov I. S. On a vector control system for operating ac-grids within high penetration of renewables 21 IMPROVEMENT OF METHODS AND TOOLS FOR TRANSIENT PROCESSES STUDYING Sedoykin D. N. Method for calculating the instantaneous frequency of a discrete vector function 28 Legkokonets P. V. On the expansion of the simplest power system aperiodic stability limit reaching criterion to the complex systems case 47 Abakumov S. A., Vishtibeev A. V., Gayazov S. E., Nadobnaya E. A., Savvin D. N., Erekaikin E. I. Optimization ways of algorithms for calculation multiple non-symmetrical states and calculation relay protection devices settings in software «ARU RZA». 52 IMPROVEMENT OF AUTOMATION AND CONTROL SYSTEMS Goryachevsky K. S., Dautov A. A., Markhaev E. E., Sinyansky I. V. Test results of the ARPM coordination system and PC SMZU 59 Goryachevsky K. S., Dautov A.A., Samusik K. A., Sinyansky I. V. Technological cycle of the monitoring system for the use of emergency control devices 66 ELECTROMAGNETIC TRANSIENT PROCESSES AND HIGH VOLTAGE TECHNOLOGY Korovkin N. V., Minevich T. G. Induced voltages in the screens of cable lines 73 Koshevoi K. E., Krasilnikova T. G. The research of conditions for unstable single-phase short circuits clearance in ultra-high voltages lines with installations of longitudinal compensation 79 Brilinskii A. S., Evdokunin G. A., Staruhina E. A., Syutkin A. V. Calculation of transformer cast resonant insulation temperature during ferroresonant processes 86 Bagan S., Govor V. M., Kalimov A. G. Modeling of the magnetic field and the current density distributions in superconducting mag-netic energy storage systems 94 FROM THE INTERNATIONAL POWER-ENGINEERING EXPERIENCE Gerasimov D. A., Gurikov O. V. Stability issues of the hydro-turbine governing systems on the example of foreign experience 103 NAMES AND DATES Koscheev L. A. My first article. 123 In memory of Evgeniy I. Petryaev 129
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