Analysis of the Spanish industry economical losses due to interruption in the electricity supply

This paper focuses on the evaluation of the economic consequences of a lack of power quality in the industrial sector. The term Power Quality includes, in general, a set of boundary conditions which allow electrical systems connected to the grid to function in their intended manner, without significant loss of performance or life. Therefore, the operation of the power system outside these boundaries directly impacts on the economic performance of the whole system. The evaluation of the economical loses derived of this fact has been matter of several studies, mostly applied to individual cases, with calculation methodologies either too complicated to be applicable, either needing a large input of data most dealing with confidentiality issues or either based on particular cases and impossible to extrapolate. The methodology proposed in this paper is relativelly easy to apply, covers a large range of cases and is based on data directly retrieved from estatistics of the Spanish government free downladable and free of confidentiality issues. An example of the application of this methodology and an analysis of the results is also provided.