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of the data exchange delay is presented. Simulation and experimental results have indicated that the Intemet provides a convenient way for inter-control-center data exchange, and, by using state estimation (SE), accurate complete network models can be obtained for practical secu- rity and made available for transfer capability analyses. Keywords: Inter-control-center data exchange, communication network simulation, complete network model, security analysis. Preprint Order Number: PE-797PRS (05-2002) Discussion Deadline: October 2002 A Heuristic Algorithm for Electric Distribution Networks Optimal Feeder Configuration Using Geographic Information System Yehia, M.; Matar, E.; Hobeila, N.Y.; Avedikian, A.D. Author Affiliation: American University of Beirut. Abstract: This paper provides a new algorithm for the optimization of distribution-network feeder configurations. The algorithm starts analysis from HV/MV substations with all loads (MV/LV substations) being disconnected and picks up loads that result in minimal incremen- tal losses. Optimality is always assured by checking on relationships correlating currents and paths,using the concept of dynamic program- ming and performing configuration changes whenever required. The algorithm relies on the comparison of the incremental losses brought by the addition of each and every load to the network. Quadratic and linear relationships between load currents and paths form the basis of the de- cisions made for the connections. The algorithm is illustrated with the help of a detailed numerical example. Geographic information systems software, ArcView, was used as the developing tool. Keywords: Distribution system, feeder reconfiguration, geo- graphic information system, heuristic algorithm, loss minimization, optimization method. Preprint Order Number: PE-602PRS (05-2002) Discussion Deadline: October 2002 Power System Planning and Implementation -~~~~~~~~~~~~~~~~~~~~~~~~~~-1 A New Formulation for FACTS Allocation for Security Enhancement Against Voltage Collapse Yorino, N.; El-Araby, E.E.; Sasaki, H.; Harada, S. Author Affiliation: Hiroshima University; University of the Ryukyus. Abstract: This paper proposes a new formulation for var planning problems, including the allocation of FACTS devices. A new feature of the formulation lies in the treatment of security issues. Different from existing formulations, we directly take account of the expected cost for voltage collapse and corrective controls, in which the control effects by the devices to be installed are evaluated together with the other controls such as load shedding in contingencies to compute an optimal var plan- ning. The inclusion of load shedding into the formulation guarantees the feasibility of the problem. The optimal allocation by the proposed method implies that the investment is optimized, taking into account its effects on security in terms of the cost for power system operation un- der possible events occurring probabilistically. The problem is formu- lated as a mixed integer nonlinear programming problem of a large dimension. The Benders decomposition technique is tested where the original problem is decomposed into multiple subproblems. The nu- merical examinations are carried out using AEP-14 bus system to dem- onstrate the effectiveness of the proposed method. Keywords: Var planning, voltage stability, FACTS devices, Bend- ers decomposition, genetic algorithms. Preprint Order Number: PE-805PRS (05-2002) Discussion Deadline: October 2002 Power System Relaying Novel Wavelet Approach to Current Differential Pilot Relay Protection Wong, C.K.; Lam, C. W; Lei, K.C.; Lei, C.S.; Han, YD. Author Affiliation: University of Macau Abstract: This paper describes a novel technique for current differ- ential pilot relay protection (CDPR) by using wavelet analysis. PSCAD is used to generate current signals at both ends of a transmission line in a typical system with fault at various locations. Discriminating between internal fault and extemal fault/change, identifying of faulted phase, and classifying fault type are achieved by using wavelet analysis. The simulation results show that this approach provides a high operating sensitivity for internal fault and remains stable for external fault/change. Keywords: Current differential pilot relay protection, wavelet analysis. Preprint Order Number: PE-540PRD (05-2002) Discussion Deadline: October 2002 Splified Algorithms for Removal of the Effect of Exponentially Decaying DC Offset on the Fourirer Algorithm Guo, Y; Kezunovic, M.; Chen, D. Author Affiliation: Texas A&M University; HuaZhong University of Science and Technology. Abstract: The impact of exponentially decaying direct component on the Fourier algorithm is theoretically investigated first in this paper. A new algorithm to eliminate the error caused by this decaying compo- nent in the Fourier algorithm has been proposed. Three simplified methods are proposed to alleviate the computation burden. The perfor- mance of the Fourier algorithm improved with these methods along with the least error squares algorithm is evaluated using a simple net- work and a real power system modeled by EMTP. The evaluation re- sults are presented and discussed. Keywords: Digital relaying, Fourier algorithm, least error squares algorithm, suppression of exponentially decaying dc offset effects. Preprint Order Number: PE-573PRD (05-2002) Discussion Deadline: October 2002 Bibliography of Relay Literature, 2001 IEEE Commettee Report Sidhu, T.S.; Bajpai, M.; Burnworth, J.; Darlington, A.; McLaren, P, G; Kasztenny, B.; Saha, M.M.; Sachdev, M.S.; Stephens, J.E.; Swanson, M.; Winston, PB. Author Affiliation: University of Saskatchewan; IEEE Power Sys- tem Relaying Comittee. Abstract: The latest of a series of classified lists of power system relaying references, begun in 1927, is presented. This bibliography is in continuation to the bibliographies of relay literature, which were pub- lished previously and are contained in IEEE Transactions. The papers listed include references to the subjects of service restoration, testing, and methods of calculation, as well as to the field of relaying. Only the more readily available foreign publications are included. Each refer- ence includes the title, author, publications information, and a very brief summary of the subject matter. The listing of titles is subdivided into ten sections, depending upon the general substance of each article. Preprint Order Number: PE-147PRD (05-2002) Discussion Deadline: October 2002 LEEE Power Engineering Review, August 2002 68
