Abstract

In this paper, the stochastic load flow analysis has been executed to solve the expected values of system bus voltages and variances. The load models of substations have been determined according to the typical load patterns and load composition of various customer classes. The random load behavior of customers served by each substation has been identified and applied to find the noise level of substation power demand. The dc circuit model of Taipower system is created and the temperature effect of customer power consumption is considered in the stochastic load flow analysis. It is found that the voltage angle difference between system buses has been introduced by the bulk power transmission. Power system operation may be deteriorated by the significant standard deviation of angle difference due to the stochastic load behavior of substations.

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