Characterization For High Voltage High Frequency And High Power Transformer In LCC-SPRC Electrostatic Precipitator

With the promotion of the national policy on environment protection, how to improve the effectiveness of the precipitator for industry with new technologies becomes a hotspot gradually. The 3-H (High Voltage, High Frequency, High Power) LCC-SPRC (LCC Series Parallel Resonant Circuit) Electrostatic Precipitator receives more and more attention for its high efficiency and low cost.The 3-H transformer is the key element in LCC-SPRC, not only for its important role in energy conversion and isolation but also for the large parasitic parameters which directly take part in the resonance, determining the operation mode and control method. The complex structure and excitation make it challenging for the characterization of the proposed transformer. However, the research related to this area is still absent.The transformer in a LCC-SPRC ESP with a specification of 16.7kHz/72kV/1.0A is researched in this thesis, which is of great value to the integrated design of the proposed equipment.The loss analysis including the winding loss and the core loss is firstly discussed. With the summarization of the present research, a novel calculation method dedicated to the proposed transformer stimulation is developed. Besides, the influence on the high frequency current density by the eddy effect is also covered.Next, the distribution of the stray inductance and parasitic capacitance is clarified from the perspective of the electromagnetic field. Considering the actual framework, isolated materials, winding voltage and winding current, the ERXP 2D & 3D model for the calculation of the leakage inductance and the novel finite analysis model for the extraction of the parasitic capacitance are introduced respectively.At last, the comparison between theoretical calculation, FEA simulation and experiment result verifies the feasibility and effectiveness of this approach.