SIIT Commemorative Publication (10 Years of International ...

10 Years of International Cooperation: FTI, Nippon Keidanren and TUSIIT Commemorative Publication, 20025. ConclusionsDistribution automation will play a vital role inderegulated power market to provide reliable, economic,secure, stable and quality power. The algorithmsdeveloped and presented in this research work can bebroadly grouped as follows:• Optimal ordering of nodes and distribution networktopology processing• Three-phase network and load models, power flowanalysis, network reconfiguration and reactive powercompensation studies• Three-phase state estimation, bad data detection andnetwork observability analysis• Three-phase fault detection analysis• Power Quality enhancement using distributionautomationAn efficient load flow solution technique is required as apart of the distribution automation system for takingvarious control and operation decisions. A new, simplerobust three-phase power flow model and solutionalgorithm is presented. The proposed method is extendedto reconfiguration and reactive power compensation. Anefficient three-phase state estimation algorithm forapplication to radial distribution networks is presented.The SE cannot be executed without an adequate numberof measurements. Due to the radial nature of thedistribution system in some cases, it may be possible togenerate the required number of data using the availablemeasurements. The proposed method is extended to thenetwork observability analysis and bad data detection.An algorithmic approach for finding the location andtype of fault based on the three-phase measurementsobtained for state estimation is also presented.Several 11 kV sample systems of 12 node, 18 node, 19node, 28 node, 38 node and a 132/33 kV practical systemwith 7 major feeders, nearly 1000 nodes, severalswitching stations/feed-points are used for testing theproposed algorithms in this research. Results of thestudies indicate that the developed algorithms aresuitable for application to practical systems. Thealgorithms have no convergence problems. Thecomputational time is fast and suitable for real timeapplications.ReferencesGupta R. P, Gopesh Tiwari, P. V. K. Reddy, R. K.Varma, and T. V. Prabhakar (1996). “An Approachfor Development of Distribution Automation6. Scope for Future ResearchIn light of the present work, further investigations can becarried out in the following related areas:6.1 Meshed NetworksThough distribution networks are generally operated asradial, there is tendency to operate as meshed networks.Extension of the proposed methods to meshed networksis worth investigating. Use of FACTS devices indistribution network is also gaining importance.6.2 Deregulated Power SystemsThe international electric utility industry is undergoing aradical transformation from essentially regulated as amonopolistic industry to an industry made uncertainwithin impending deregulation and the advent ofcompetitive forces. This calls for additional functionsinvolving techno-economical aspects in the distributionsystems operation. Captive power plants, specificindustrial loads, custom power, power quality relatedaspects are to be addressed.6.3 Artificial Intelligence (AI) TechniquesExpert systems, Heuristic techniques, Artificial NeuralNetworks (ANNs) and fuzzy logic techniques areemerging in the field of artificial intelligence (AI)techniques. Some of the analytical functions of DMSmay not perform properly in the absence of adequatereliable data. In such cases expert systems/heuristicalgorithms are likely to provide an acceptable level ofsolution. Using more realistic models, training patternscan be generated, which can be used to train the NeuralNetworks for application in DMS.The electric power industry is in the midst of a majorrestructuring in which electric energy will be traded as acommodity. Electric power markets will foster openaccess to all suppliers of electric power. Discriminationagainst any user of transmission system will be reducedor eliminated. A competitive wholesale market at thenational level will be fostered to reduce prices and acompetitive retailed market at the state level will beencouraged to provide customer choice and competitionin service and reliability. Ultimately, small customerswill be able to choose their electric suppliers much asthey currently select their long-distance telephonecarriers.Software” Ninth National Power Systems Conference(NPSC’96), Vol. 1, pp. 49-53.26