Showing papers in "Electric Power Systems Research in 1996"

TL;DR: In this article, the problem of the optimization of the structure of a power system where redundant elements are included in order to provide a desired level of reliability is considered, and a procedure which determines the minimal cost series-parallel system configuration is proposed.

TL;DR: In this paper, the application of a hybrid wind/photovoltaic (PV) power generating system for utilization as a stand-alone or a network connected system is investigated.

TL;DR: The load flow results of a distribution system for various voltage dependent load models are compared and the convergence patterns of the load flow method for various load models were compared.

TL;DR: The results reported in this paper have not been obtained before and they demonstrate the effectiveness of the genetic algorithms in the tuning of the AGC parameters.

TL;DR: In this article, a model for a residential electric water heater load is developed using an energy flow analysis of the water heater tank, which is then used to assess the effectiveness of several demand-side management strategies.

TL;DR: In this article, a site-independent expert system-based short-term load forecasting (STLF) model is presented. But, the model is based on a parameterized rule base and a parameter database.

TL;DR: This work considers a two-terminal transmission line, confirms that fault resistance and the location of faults can produce erroneous relay function and suggests ways to ensure the generation of the correct signal for relay operation.

TL;DR: In this paper, a supervisory functional artificial neural network (ANN) technique is applied to solve the load forecasting of three Taipower substations which serve the different customer types, which can be categorized as residential, commercial and industrial.

TL;DR: The paper describes in detail the feature extraction, sampling rate, data window and structures of the neural networks of the adaptive protection scheme based on neural networks with special emphasis on analysis of the first-zone performance.

TL;DR: In this article, the authors proposed a GA in conjunction with constraint handling techniques to solve the thermal unit commitment problem, where the difficult minimum up-and down-time constraints are embedded in the binary strings that are coded to represent the on-off states of the generating units.

TL;DR: A new model is presented that enables linear Kalman filtering (KF) to be applied for the direct estimation of symmetrical components in unbalanced three-phase systems and it is shown thatKalman filtering models are well suited for symmetrical component estimation online.

TL;DR: In this paper, a generalization on the tabu search method, recently developed for combinatorial optimization problems, is described, and a simulation comparison is done between the proposed method and the simulated annealing method.

TL;DR: In this article, the equal-current synchronous detection method (CSD) is applied to calculate the reactive and harmonic current compensation components for triggering an active filter in an unbalanced three-phase power system.

TL;DR: In this article, a branch factor based fault location method for fault location on three-terminal transmission lines is described. And the fault point is located in a reliable and simple manner.

TL;DR: In this paper, a new approach for minimizing line losses and finding the optimal capacitor allocation in a distribution system is presented, which is formulated as a linear programming problem and is solved by a recursive process.

TL;DR: In this article, a digital technique for detecting internal faults in stator windings of synchronous generators is described, which does not need information concerning the machine parameters and is applicable to all types of generators, irrespective of their size.

TL;DR: An assessment of the costs and benefits associated with the use of fuzzy sets theory is performed to assist both researchers and utility engineers in evaluating its suitability for specific applications that they might encounter.

TL;DR: This paper offers a detailed description of the infeasible interior point algorithm and addresses some important implementation issues such as the determination of the barrier parameter, the choice of the initial point, and the efficient solution of the optimality-condition equations by sparse matrix techniques.

TL;DR: In this paper, the design and construction of overcurrent and directional overcurrent relays with ground fault protection for the protection of three-phase subtransmission and distribution systems, using a 16-bit microprocessor, the Intel 8096BH.

TL;DR: A new algorithm, discrete ascent optimal programming, for optimal power flow in distribution systems is presented and will converge to the same solution as the Lagrange multiplier approach, as demonstrated by example.

TL;DR: In this paper, an artificial neural network (ANN)-based on-line approach to evaluate the dynamic stability of a single machine infinite bus system is presented. And the results show that the proposed method is very promising and encouraging for fast real-time evaluation of the dynamic performance of power systems.

TL;DR: In this paper, a new numerical algorithm for recognizing arcing faults for the purpose of automatic reclosing is presented, which can be used as an effective tool in transmission and distribution system protection.

TL;DR: In this article, the authors presented the hourly load forecasting results of the Egyptian unified grid (EUG) based on a generalized model combining the features of ANN and an expert system.

TL;DR: In this article, a simple method for identifying different types of loads on line is described and a quantitative metric that describes the contribution of each individual load type to the total load at a load bus is developed.

TL;DR: In this article, the tuning of power system stabilizers (PSS) using genetic algorithms (GA) has been investigated, where a digital simulation of a linearized model of a single-machine infinite bus power system at some operating point is used in conjunction with the GA optimization process.

TL;DR: In this article, a regression model is proposed to estimate the feeder and substation cold load pickup after scheduled outages, and the model is applied to the large-scale rotating interruptions.

TL;DR: In this article, the eigenvector method (EVM) and a new load duration curve (LDC) model are used to estimate DSM impacts on future electricity demand, which are then integrated into the supply-side planning process by using the new LDC model.

TL;DR: In this article, a quasi-static economic dispatch method is presented based on dynamic programming employing an improved zoom feature (DPZF), which yields significant savings in computation time and memory compared with traditional DP methods, exhibiting a speedup ratio of approximately 25:1.

TL;DR: In this article, a nonlinear excitation controller for single-machine infinite-bus power systems is proposed, where the concept of feedback linearization is used to take advantage of well-developed linear control techniques and the region over which the linearizing state transformation is guaranteed to be diffeomorphic is provided.

TL;DR: In this article, the concept of area transient error (ATE) is introduced in order to look at the possibilities of using it as an indicator of system condition, and a load shedding scheme applied in one area is based on the ATE.