Lu, Lian. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2013. / Includes bibliographical references (leaves 91-95). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web.

Thesis--M. Phil., University of Hong Kong, 1978.

No description available.

No description available.

Electric power systems are characterized by their immense complexity. The assessment of their security on-line has always been a challenging task. Many possibilities were investigated in the past in an attempt to characterize the secure operating region of a power system. Pattern recognition is thus far the only tool that can take various degrees of network complexity into consideration. / In the present study, an efficient algorithm which learns adaptively the secure operating region is proposed. At each iteration, training operating points are generated sequentially on a piecewise linearly approximated separation surface computed by the one-nearest-neighbor (1-NN) rule. The separation surface so estimated approaches the true one as the number of training points increases. The algorithm not only provides a consistent technique in learning an unknown region, it generates a highly efficient training set. It is found to be effective in reducing the size of the training set without adverse effect to the classifier. / Once the secure region of a power system is available, the task of on-line security monitoring reduces to one of determining whether the current operating point resides in the secure region. As demonstrated in the thesis, both the security status and the security margin of the operating point can be assessed very efficiently. By using the piecewise linearly approximated secure region, the thesis proceeds to give efficient ways of moving an insecure operating point into the secure region. This comprises the problem of security enhancement. / The regionwise methodology via the Voronoi diagram developed in the thesis is also applied to a wide range of problems, such as network planning, coordinating tuning of machine parameters and automatic contingency selection. The major merit is that the dynamics and the nonlinearity of the system no longer present a limitation to solving these problems.

Thesis (M.S.)--Ohio University, August, 2006. / Title from PDF t.p. Includes bibliographical references.

Thesis (M.S. in electrical engineering)--Washington State University, December 2007. / Includes bibliographical references (p. 61-62).

Thesis (M.S.)--University of Missouri--Rolla, 1989. / Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed October 7, 2008) Includes bibliographical references (p. 89).

Thesis (Diploma (Electrical Engineering))--Cape Technikon, 1993. / The research objectives were to: Formulate a training structure covering conventional power systems topics; Research existing PC based power systems software resources; Develop a structure for a PC based power systems course; Research the capabilities of the software resources chosen; Develop a structure for a modern PC based power systems course taking into account the capabilities and limitations of the selected software programs; Develop for the PC based power systems course, task orientated computer based laboratory set-ups. The set-ups provide: An introduction into the topics concerned; An explanation of the usage of each program applied, where usage means an explanation of the Input and Output Data of each program; User friendly simulation experiments. These set-ups, together with software programs and a personal computer integrate into a training programme and realize a power systems simulation course.

Orientadores: Carlos Alberto Castro Júnior, Manfred Fritz Bedriñana Aronés / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação / Made available in DSpace on 2018-08-24T09:53:50Z (GMT). No. of bitstreams: 1 Xavier_CarlosEduardo_M.pdf: 2536219 bytes, checksum: cdaf7cc5b96c9695e965ceacd285daa5 (MD5) Previous issue date: 2013 / Resumo: Esta dissertação de mestrado apresenta um método prático para o cálculo do ponto de máximo carregamento (PMC) de sistemas elétricos de potência baseado nas propriedades geométricas do problema, e na utilização de um fluxo de carga de Newton-Raphson com otimização de passo (FCOP). O PMC é obtido considerando uma margem de erro aceitável ?%, sendo esta margem uma informação prática que pode ser definida pelo operador da rede. É também realizado um equacionamento apropriado para aplicação do método prático em áreas previamente definidas. São apresentados resultados de simulações para sistemas de transmissão teste do IEEE, sistemas de distribuição e sistemas reais incluindo o Sistema Interligado Nacional (SIN) com mais de 4.500 barras. Foram realizadas inúmeras simulações com o método proposto a fim de avaliar a sua robustez, tendo sido estipuladas margens de erro aceitáveis de 0,1% até 10% e carregamento inicial para as redes partindo do caso base até valores muito altos, que geralmente correspondem a situações de infactibilidade / Abstract: This thesis presents a practical method for calculating power systems¿ maximum loading points (MLP) based on the geometric properties of the problem, an on the use of a Newton-Raphson load flow with step size optimization (LFSSO). The MLP is obtained by considering an acceptable error margin ?%, where this margin is a practical information that can be defined by the network operator. A formulation for practical application of the method to previously defined areas is also presented. Simulation results are presented for IEEE test transmission systems, distribution systems and realistic systems including the National Interconnected System (NIS) with over 4,500 buses. A large number of simulations have been carried out for evaluating its robustness, with acceptable errors ranging from 0.1% to 10%, and initial loadings starting from the base case up to very high values, which generally correspond to infeasibility situations / Mestrado / Energia Eletrica / Mestre em Engenharia Elétrica