The economic evaluation for power quality is of great significance in the improvement of econo-mic efficiency of power quality control and reduction of economic loss utility and consumers. Reasonable economic involves in the data information in such multiple aspects as the monitoring data of power quality

parameters of electrical equipment

production process and financial data of the customers and those information is spread in the monitoring system of power quality

the management system of electrical equipment and production management system and is difficult to achieve integration and share. In this paper

the expansion method of common information model for the economic evaluation of power quality is proposed based on the common information model in IEC 61970/IEC 61968. The economic cost composition of the power quality is analyzed and basic data for the economic evaluation improvement of power quality is summarized from four aspects. The common information model for the economic evaluation of power quality is established from such three aspects as economic loss of power quality

power quality measurement and information of electrical equipment with the problem of the continuous and event power quality as the starting point

the important inherent property of related expansion type is given

which lay the foundation data integration and information share of economic evaluation of power quality.