Reactive Power Control Scheme Based On Correlation Coefficients for Voltage and Current Signals

.Abstract: In modern digital protection and control systems, a correlation technique has recently become the workhorse of quantitative research and analysis. In this paper, a correlation technique is developed for calculation of original power factor on-line, active and compensation reactive powers and determination of the required number of capacitor banks to get the desired power factor. Cross-correlation coefficients are calculated between phase voltage and current signals of power supply. The proposed technique is able accurately to identify the required capacitor rating to get the desired power factor under different loading levels. The suggested technique performs the task of cross-correlation coefficients calculations within one-cycle. Thus, the algorithm is well suited for implementation in a digital reactive power control scheme. Alternative transient p