高壓高頻變壓器場路耦合建模研究
欒宇，郭健
（南京航空航天大學 自動化學院，江蘇 南京 211106）
摘 要：高頻高壓狀態(tài)下變壓器會在極短的時間內遭遇電壓的沖擊，出現(xiàn)電壓分布不均勻的情況，將對變壓器內部絕緣產(chǎn)生影響，故對變壓器分布參數(shù)研究時劃分要更加細致，還要考慮變壓器鐵芯磁路和負載情況。以應用于靜電除塵系統(tǒng)內的高頻高壓變壓器工作情況為例，建立了變壓器場路耦合模型，結合工作中變壓器帶負載的情況以及建模分析時鐵芯對電感參數(shù)的影響，對于無法實測的量選取相關量進行仿真測試，結合變壓器鐵芯計算模型，在特定研究范圍內對變壓器鐵芯進行簡化等效，并對場路耦合模型短路和開路狀態(tài)下的鐵芯設置相應磁導率，將ANSYS仿真和試驗得到的對數(shù)阻抗頻率響應曲線相比較，證明了場路耦合模型建模與驗證的正確性。
關鍵詞：靜電除塵；LCC諧振電路；場路耦合模型；變壓器鐵芯簡化；ANSYS仿真
中圖分類號：TM401+.1 文獻標識碼：A 文章編號：1007-3175(2020)12-0013-06
Research on Field-Circuit Coupling Modeling of High Voltage and High Frequency Transformer
LUAN Yu, GUO Jian
（College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 2111 06, China）
Abstract: Under the condition of high frequency and high voltage, the transformer will encounter the voltage impulse in a very short time, and the non-linear voltage distribution will affect the internal insulation of the transformer. Therefore, the voltage distribution parameters of transformer should be divided more carefully, and the magnetic circuit and load of transformer should be considered. Taking the operating condition of high frequency and high voltage transformer applied in electrostatic precipitator system as an example, the field circuit coupling model of transformer is established. According to the load condition of the transformer in operation and the influence of iron core on inductance parameters during modeling and analysis, the relevant parameters are selected for simulation test for the parameter that cannot be measured, and the calculation model of transformer core is combined. Within the scope , the transformer core is simplified and equivalent, and the corresponding permeability is set for the iron core under the short circuit and open circuit state of the field circuit coupling model. The logarithmic impedance frequency response curve obtained by ANSYS simulation and test is compared, which proves the correctness of the field circuit coupling model modeling and verification.
Key words: electrostatic precipitator; LCC resonant circuit; field-circuit coupling model; simplified transformer core; ANSYS simulation
參考文獻
[1] 龔龍中. 靜電除塵用高壓大功率LCC諧振變換器的設計[D]. 南京：東南大學，2017.
[2] 劉軍.LCC-SPRC高壓高頻大功率電除塵電源的理論分析與功率參數(shù)設計[D]. 杭州：浙江大學，2010.
[3] CHEN Liu, LEI Qi, XIANG Cui, et al.Wideband mechanism model and parameter extracting for high-power high-voltage high-frequency transformers[J].IEEE Transactions on Power Electronics，2016，31(5)：3444-3455.
[4] WEI Shen, DUSHAN Boroyevich, FEI Wang, et al. High-density nanocrystalline core transformer for high-power high-frequency resonant converter[J].IEEE Transactions on Industry Applications，2008，44(1)：213-222.
[5] CHEN Liu, LEI Qi, XIANG Cui, et al. Experimental extraction of parasitic capacitances for highfrency transformers[J].IEEE Transactions on Power Electronics，2017，32(6)：4157-4167.
[6] COGITORE B, KERADEC J, BARBAROUX J.The twowinding transformer: an experimental method to obtain a wide frequency range equivalent circuit[J].IEEE Transactions on Instrumentation and Measurement，1994，43(2)：364-371.
[7] BLACHE F, KERADEC J, COGITORE B. Stray Capacitances of Two Winding Transformers: Equivalent Circuit, Measurements, Calculation and Lowering[C]//Industry Applications Society Annual Meeting，1994：1211-1217.
[8] YU Zhanqing, HE Jinliang, ZENG Rong, et al. Simulation analysis on conducted EMD caused by valves in ±800 kV UHVDC converter station[J].IEEE Transactions on Electromagnetic Compatibility，2009，51(2)：236-244.
[9] DE GREVE Z, DEBLECKER O, LOBR J.Numerical modeling of capacitive effects in HF multiwinding transformers—PartⅡ:Identification using the finite-element method[J].IEEE Transactions on Magnetics，2013，49(5)：2021-2024.
[10] 王贊基. 超高壓大型變壓器線圈的暫態(tài)電壓分布及其仿真[D]. 北京：清華大學，1990.
[11] 張喜樂.VFTO對電力變壓器影響的時域仿真計算及實驗研究[D]. 保定：華北電力大學，2008.
[12] 薛米子. 電力變壓器無電感寬頻特征模型基礎理論研究[D]. 南京：南京航空航天大學，2019.
[13] 薛米子，郭健. 直流記憶磁通正交磁化可控電抗器調磁性能[J]. 電工電氣，2019(2)：17-20.
[14] 沈湛.96 kVA高壓中頻變壓器優(yōu)化設計研究[D]. 南京：東南大學，2016.
[15] 夏冰. LCC諧振變換器在大功率高輸出電壓場合的應用研究[D]. 南京：南京航空航天大學，2008.
