Reduction of disturbances in a power network

Details Reduction of disturbances in a power network Reduction of disturbances in a power network

H - Electricity

02

J

H02J 3/01 (2006.01)

Patent

CA 2097600

A method and a device in an elec- tric power network (1), comprising an active filter (4) controllable via a control input (41), for reducing disturbances generated by a disturbance source (6) lo- cated in and/or connected to the power network. A control member (8) is adapt- ed, based on at least one first state var- iable (Y1i) sensed in the power network (1) and a model of the power network (1), to calculate the disturbances (X2) which occur in a second section (B-B) in the power network (1) without action from the active filter (4), to calculate a control signal (C1) such that, supplied to the control input (41), it would gen- erate in the second section (B-B) the cal- culated disturbances (X2) with reversed polarity, and to generate the control sig- nal (C1) and supply this to the control input (41). By sensing, in addition, at least one second state variable (Y2i) in the second section (B-B), the control sig- nal (C1) can also be generated in depen- dence on the control deviation (DU) of the second state variable (Y2i) from a desired value (Y2R).

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