CONCEPTIONAL Study of structural criteria of steady state stability of complex integrated power systems
The study presents a qualitative assessment of the impact of non-concervative forces on stability of the power system near the area of aperiodic steady state stability. A comparative analysis of the border shows the possibility of application of simplified models to perform primary, qualitative assessment of the transmit power-limited power system modes. Computational studies has shown that in all scheme-operational conditions regardless of the structure and rigidity of power transmission, the violation of vibrational stability of the power system is observed before aperiodic stability border. The quantitative and qualitative assessment of the nature of the change of the absolute term of the characteristic equation of the linearized differential equations system of the relative electromechanical system motion with transmission power mode weighting up to a physically realizable. A new structural criterion of a vibrational violation of a steady state stability has been formulated and justified, based on the control of the partial derivative. The article is of general nature of series of publications [1-5], in which the results of numerous studies of steady state stability of extended power pool systems with different structures are presented. Pointed and proposed new quality criteria allow carrying out a quick search (express analysis) of the area of potentially sustainable modes of real-controlled power system with intensive control of any structure.