Fuzzy-expert system for voltage stability monitoring and control

Abstract

and critical bus that participate in the instab ility and tJlerd)y el iminate the problems assoc iated with traditional methods. Hence. modal anal ysis techni que is not only used as a benchmark 100 1 for the development of the proposed fuzzy.expert system. but also as aD important tool for validatin g its accuracy.To understand this new approach. fundamental. conceptS of fuzzy logic basedon the theory o f appro ximate reasoni ng is dealt in detai l. To get further insight into this alterna te approa ch. a simple method using fuzzysets for the voltage-reacti ve power co ntro l to im prove the system vo ltage level is presen ted A modi fied IEEE 30 bus system is used as an exam ple to illustra te this method. Simulation results of this simple problem is encouragin g and has been a useful starti ng point for the proposed fuzzy-expc:n system for voltage stabili ty eval uation.The proposed fuuy-expm system consists of two main components . The system is taken as a case sIUdy to illustrate the proposed procedure. The expert system output is compared with the simulation results of a commerc ially available software ( VSTAB 4.1) output through modal analysis. The proposed system is fast and more efficient than conventional voltage stability methods.iii

A Study on the Conception of Generic Fuzzy Expert System for Surveillance

“…Publications about SEF Industrial diagnosis [45], [30], [31], [32], [33], [28], [34], [35], [36], [37], [38], [39], [40], [41], [42], [6], [43] , [44], [7], [11], [14], [8], [15], [10], [50], [58] Medical diagnosis [47], [52], [46] , [48], [49] , [18], [19], [20], [21], [53], [23], [54], [19], [45] Video surveillance [54], [60] Economic domain [55], [56], [51] Civil domain [34], [10], [27] Software domain [57] 219 | P a g e www.ijacsa.thesai.org This state of art on FES between 2007 and 2013 took into account 50 n...…”

Fuzzy logic and artificial neural network-based thermography approach for monitoring of high-voltage equipment

“…4 A review of the application of this powerful tool in meeting challenging different problems in the EPS has been given in the literature. 5–9…”

Voltage stability evaluation of power system with FACTS devices using fuzzy neural network

“…To improve voltage security of power systems, a fuzzy control approach was presented by fuzzy modeling of bus voltage violations (Su and Lin, 1996). A fuzzy-based expert system was proposed to evaluate the voltage stability state of the power system by monitoring the eigenvalues of the load flow Jacobian with the help of modal analysis in (Nageswararao and Jeyasurya, 1998). So far, no work has been reported by using fuzzy sets to evaluate voltage stability of power systems with STATCOM.…”