HARMONIC SUPPRESSION DYNAMIC FILTER FOR AC ELECTRICAL POWER SYSTEM Russian patent published in 2010 - IPC H03H7/00 

FIELD: electricity.

SUBSTANCE: invention refers to harmonic suppression dynamic filter (HSF) intended for AC electrical power system. HSF contains at least one voltage source (V) and at least one load. HSF contains transformer (T₁) for current acquisition (RCT) or voltage input (IVT) which is connected in series with voltage source and load where one end of primary winding (P₁) of RCT or IVT is connected with voltage source and the other end of primary winding of RCT or IVT is connected with load; transformer (T₂) for current input or voltage acquisition connected in parallel with voltage source. In this filter, one end of primary winding (P₂) of this RCT or IVT is connected with common point of link between voltage source and primary winding of RCT or IVT and the other end of primary winding of RCT or IVT is grounded. Transformation ratio between two transformers is equal to one. Suggested filter also contains parallel resonant LC-circuit (L₁C₁) tuned on electrical power system basic frequency where one end of secondary winding (S₂) of RCT or IVT is connected with one node point of parallel resonant LC-circuit and the other end of secondary winding of RCT or IVT is connected with the other node point of parallel resonant LC-circuit via transformer secondary winding (S₁) for current acquisition or voltage input.

EFFECT: simplicity of design and efficiency.

23 cl, 14 dwg