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This paper proposes a method to establish an optimal dynamic coordinated condition-based maintenance strategy that considers harsh external conditions, for example, harsh weather conditions. Component deterioration is modeled as a Markov process based on physical characteristics, with the effects of harsh external conditions represented as probabilistic models. The proposed model involves interactions...
This paper proposes a model for analysis of life cycle cost (LCC) of the transmission systems. First, to build the model of LCC of the transmission systems, the whole LCC process of components is divided into five costs, i.e., initial cost, operating cost, maintenance cost, fault cost and disposal cost. Second, during the calculation of the maintenance cost, the grey system theory is employed to predict...
The daily clearing price curve in electricity market varied with multi-period and strong fluctuation characteristic. When grey GM (1, 1) model is used in forecast, the forecast error exceeded the permitted precision. This is because GM (1, 1) model is invalidated only if the price series did not follow the rule of exponential growth. In this case, grey model with period residual modification is proposed,...
Forecast of wind speed is very important for making out dispatch scheme of power system and operation in higher reliability, according to the forming mechanism of wind, its influencing factors and its inherent variation rule, one of pattern recognition called as adaptive neuron-fuzzy inference system, abbreviated as ANFIS is used in wind speed forecast. The hybrid algorithm is used to train the parameter...
The technical and economical index of traction substations are concerned with the reactive power and negative phase-sequence (nps) power. Set up of parallel reactive compensation (PRC) which have combined compensation effects for the reactive power and nps power is the key to the problem. PRC for the positive sequence reactive power of traction load is only related to the total compensating capacity,...
Although China is abundant in renewable resources, the development level of green power is rather low as it contributes less power to the society compared with conventional power. After drawing a comparison of domestic and overseas situations of green power development, this paper discusses the obstacle to green power existed nowadays in China and the impetus to development. Then a new market mode...
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