ELECTROMECHANICAL SYSTEM EQUIVALENT AND DYNAMIC LOAD AGGREGATION FOR TRANSIENT STABILITY OF ELECTRIC POWER SYSTEM

Mohamed EL-Shimy
2017 Figshare  
This research is aimed at enhancing the transient stability simulation of large-scale power systems by developing the power system model-reduction theory via (i) Development of accurate and fast coherency-based electromechanical reduction technique for large-scale power systems for use in transient stability studies. (ii) Development of dynamic load modeling and developing a generalized and an accurate technique for dynamic load aggregation. The considered load subsystem is constructed of
more » ... onnected induction motor loads (with different sizes and with different loading levels) and static loads. (iii) Enhancement of transient stability analysis of large-scale power systems through the integration of system electromechanical equivalent and dynamic load aggregation. An electromechanical equivalent is proposed, applied, and evaluated on different large-scale systems. The power systems are divided, after selecting the study area, into two main regions: (i) A coherency-based external system that is subdivided into a set of external areas, each of which contains a group of coherent generators obtained from a proposed quasi-linear solution of the system differential equations and correlation factor analysis. (ii) A remote system that is considered electrically far enough from the study area to be represented by a very simple electromechanical model. The terminal buses of each group of generators are replaced by one common bus. The parameter of the new network interconnecting each of the common buses and each area terminal buses to the rest of the system is calculated by the proposed network reduction technique. The final stage of constructing the equivalent is obtained dynamic aggregation of each coherent group and the remote area generators. A new developed technique for aggregating dynamic system loads is proposed, applied, and evaluated on different power systems. The proposed load aggregation technique overcomes the limitations placed on previous techniques as: (i) There are no limitations on the [...]
doi:10.6084/m9.figshare.5623708.v1 fatcat:wgtihlmozzahvhqze56qcdw4ju