Indices for the power quality monitoring in the Romanian Power Transmission System

The power quality monitoring is one of the modern issues of the electricity market. The permanent monitoring of power quality parameters is used to verify the contractual requirements presented in regulations. There is a need for common power quality indices that are the result of synthesis, reducing or extracting from a large volume of power quality measurement data. The values for these indices have to be compared to the limits described by the national regulator. The paper presents in a synthetic manner, indices for the continuity and power quality monitoring in the Romanian Power Transmission System. Are identified the main causes of worsening power quality in some areas of the transmission system.