2 results about "Phasor" patented technology

The invention provides improved control of a power transmission system having a first group of measurement units in a first geographical area providing a first set of phasors and a second group of measurement units in a second geographical area providing a second set of phasors, where the phasors in the sets are generated at the same instant in time. In this system the power control device includes a phasor aligning unit that time aligns the first and second sets of phasors and a control unit that compares each set of phasors with a corresponding phasor number threshold, determines that a first control condition is fulfilled if each phasor number threshold has been exceeded and enables the provision of a common signal if the first control condition is fulfilled. The common signal is based on the obtained phasors in the first and second sets.

Systems and methods for determining offset phasors are disclosed. An offset vector is computed from a current channel impulse response and a previous channel impulse response. A first vector and a second vector are simultaneously and iteratively rotated in opposite directions to determine an offset phasor. A first vector of the pair of vectors is initialized with a constant value for its x coordinate and a zero for its y coordinate. A second vector of the pair of vectors is initialized with the x and y coordinates of the offset vector. The vectors are rotated in opposite directions using shift operations for a specific number of iterations. After the final rotation, the y coordinate of the second vector has become zero and the x and y coordinates of the first vector correspond to the sine and cosine of the angle formed by the offset vector. The cosine and sine terms form the real and imaginary parts of the offset phasor.