Method for obtaining single-phase double-winding transformer improved pi model considering iron core deep saturation features
A double-winding transformer and model acquisition technology, which is applied in the electric power field, can solve problems such as simulation errors and failure to consider changes in iron core model parameters, and achieve the effect of improving simulation capabilities
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[0034] The present invention will be further described below in conjunction with drawings and embodiments.
[0035] An improved π model acquisition method for a single-phase double-winding transformer considering the deep saturation characteristics of the iron core, comprising the following steps:
[0036] S1: When the transformer is working in the unsaturated region, use the open circuit test and short circuit test to determine its parameters;
[0037] S2: When the iron core of the transformer is working in the saturation region, conduct a deep saturation test, use the AC-DC hybrid power supply to excite the iron core to obtain a saturated state, and test the apparent incremental inductance L of the port under different saturation levels 1 , L 2 ;
[0038] Calculate the saturated inductance L of the two excitation branches according to the circuit structure of the π model m1_s , L m2_s , and then converted to excitation curve data, the excitation curve data of the entire ...
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