i am using MSP430F47187 for our development. i have calculated voltage and current samples ,from these samples ,i have calculated RMS voltage,RMS current ,powers and power factor but these powers are in absolute i.e. no sign so i need to calculate these powers(active & reactive) with sign(+ & -) . in short i need four quadrant measurement through this MSP430.
kindly revert me proper calculation of powers and angle also in signed form.
waiting ur reply!