2023 ieee 16th international conference of actual problems of electronic instrument engineering (apeie)

Dynamic stability - the ability of the system to restore the original mode or close to it after a major disturbance (short circuit, line failure, etc.). In the analysis of dynamic stability, it is necessary to formulate and integrate very high-order nonlinear, transcendental equations to determine changes in mode parameters (divergence angles of generator rotors, currents, voltages, etc.). For this, computers equipped with automation, which facilitate calculations, and calculation models of alternating current are used. However, often, special algorithms and programs are created on the basis of well-known digital integration methods that allow the computer to make decisions.

• 
  The result is stability - the ability to restore the initial mode with subsequent restoration without turning off the main working elements of the system after the synchronous operation of the system (asynchronous operation of part of the synchronous generators of the system) has been broken for some time. The permissibility of asynchronous mode and its duration are limited by the negative impact on generators (current overload, large pulsation torque), load (voltage drop and change), parallel operating systems (the possibility of their oscillation). Elimination of asynchronous mode is facilitated by emergency automatic devices and other special devices.
  

It should be emphasized that the electricity industry is facing common global problems and that global efforts, cooperation and sharing of best practices are needed to prevent power outages [12], [13], …, [16].
Static stability calculations are combined with normal steady state calculations performed by iterative methods, the approximation of which (subject to some special conditions and restrictions) can be used to evaluate the existence of a stable mode. The possible nature and uncertainty of the initial data required for stability calculations becomes more significant as the systems become more complex, encouraging the development of new methods that take into account the characteristics of the electrical system. Such methods, which have not yet fully penetrated into engineering practice, are being developed and improved.