METHOD OF SUBOPTIMAL CONTROL OF THE INTERCHANGE POWER FLOWS IN THE INTERCONNECTED ENERGY SYSTEM

Abstract

The method of optimized economic dispatch control (EDC) of the wide area Interconnected Power System (the IPS) with effective inter-areal power balancing is presented. The algebraic expressions valid for online computations of the best gain values for the automated generation control (AGC) have been specified to provide suboptimal control processing for the area, or regional power system (PS). Relevant operational conditions for secondary frequency and power control system were determined to compensate electric power flow imbalances in certain control areas (regional PS) of the considered IPS. 
 To apply optimized AGC gain tunings, the numerical values of current power imbalances should be used for computations and proposed algebraic expressions are to be embedded seamlessly into the AGC algorithms of the SCADA-based multifunctional digital automated control system, which is already operated now to provide consistent controllable support for the normal processing inside the IPS of Ukraine. The AGC controllers of the SCADA-based system should be tuned periodically according to the proposed approach and the gain values updated properly.