METHOD AND APPARATUS FOR COMPENSATION OF VIBRATION EFFECTS OF NETWORK ASYMMETRY IN A DOUBLE-POWERED ASYNCHRONOUS MACHINE

摘要

In a method for compensation of rotor torque harmonics after occurrence of network asymmetries in a double-powered asynchronous machine (1), the invention provides that at least one present machine parameter is measured and/or derived, the at least one machine parameter is broken down into a positive sequence system component, a negative sequence system component, and also optionally a DC-component, and that for the positive sequence system component, the negative sequence system component, and optionally for the DC-component of the at least one machine parameter, separate control elements are provided to control one servo-parameter to which the particular components of the machine parameters are supplied as input components and the output values thereof are additively interlaced. The control elements therein are designed in order to regulate the servo-parameters so that the torque pendulations are counteracted. Alternatively, a control element is provided to which the cross-product of positive sequence system components and negative sequence system components, and also the cross product of negative sequence system components and positive sequence system components are supplied as input parameter, wherein the control element is designed so that the servo-parameter is regulated in such a manner that second order torque pendulations are counteracted.