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Typhoon disasters usually cause faults to power grids, such as broken lines, collapsed towers, windage yaw flashover and so on. In severe situations, they may result in group-occurring faults and lead blackout to power systems. As a result, it is very necessary to extend the power system early-warning defense schemes, from the traditionally general anticipated fault set to group-occurring faults caused...
Pollution of the power plant has caused harmful environmental effects due to the emission of greenhouse gas. The pollution can be reduced by adjusting the real power outputs of different power plants. However, the relocation of real power outputs results an additional outlay in the system. In order to eliminate the conflict between the cost and emission, an optimal power flow is introduced in this...
Discriminating between the magnetizing inrush and the internal fault of a power transform is a major challenge when designing differential transformer protection. In this paper, a novel method, which is based on mathematical morphology (MM) and artificial neural network (ANN), is proposed to solve this problem. Firstly, an MM based stage is used to extract shape features from differential currents,...
Generation investment decision-making is a very complicated problem in the electricity market environment because of various kinds of uncertainties. The enforcement of the emissions trading scheme will make the problem even more complicated, especially for coal-fired generation units. Given this background, a new approach is developed for evaluating the value of a generation investment project in...
This paper proposes a scheme based on the embedding theorem to locate and classify the transient disturbances in power system signals. The disturbance signals are transformed to the phase space, where the normal part of the signal and the disturbance form two waveforms that can be distinguished from each other, and the location and classification are based on the information obtained from the embedded...
Optimal Power Flow (OPF) is an effective tool for dispatch planning of power systems, and the algorithms aiming to solve the OPF have been widely studied. Among these algorithms, the Evolutionary Algorithms (EAs) are a popular type, which have been investigated. However, EAs are also notorious for the intensive computation caused by a large amount of evaluations of the objective function required...
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