PROCESS OF FORMATION OF SIGNALS PROPORTIONAL TO SYMMETRIC COMPONENTS OF THREE-PHASE SYSTEM Russian patent published in 1997 - IPC

FIELD: measurement technology, electrical engineering. SUBSTANCE: distinguishing feature of process lies in scaling of signals of tested three-phase system by amplitude before multiplication. Then three intermediate signals are formed correspondingly from obtained scaled signals by subtraction and addition. Intermediate signals are multiplied by signals of reference orthogonal high-frequency voltages with frequency considerably exceeding frequency of three-phase network. Undesirable frequencies are suppressed in signals obtained after multiplication by means of high-frequency filters. EFFECT: expanded functional capabilities of process, enhanced fastness of measurements, use of symmetric components of three-phase systems in measuring and emergency automatic devices of energy systems, three-phase electric drives, etc. 1 dwg