高壓高頻變壓器場(chǎng)路耦合建模研究
欒宇，郭健
（南京航空航天大學(xué) 自動(dòng)化學(xué)院，江蘇 南京 211106）
摘 要：高頻高壓狀態(tài)下變壓器會(huì)在極短的時(shí)間內(nèi)遭遇電壓的沖擊，出現(xiàn)電壓分布不均勻的情況，將對(duì)變壓器內(nèi)部絕緣產(chǎn)生影響，故對(duì)變壓器分布參數(shù)研究時(shí)劃分要更加細(xì)致，還要考慮變壓器鐵芯磁路和負(fù)載情況。以應(yīng)用于靜電除塵系統(tǒng)內(nèi)的高頻高壓變壓器工作情況為例，建立了變壓器場(chǎng)路耦合模型，結(jié)合工作中變壓器帶負(fù)載的情況以及建模分析時(shí)鐵芯對(duì)電感參數(shù)的影響，對(duì)于無法實(shí)測(cè)的量選取相關(guān)量進(jìn)行仿真測(cè)試，結(jié)合變壓器鐵芯計(jì)算模型，在特定研究范圍內(nèi)對(duì)變壓器鐵芯進(jìn)行簡(jiǎn)化等效，并對(duì)場(chǎng)路耦合模型短路和開路狀態(tài)下的鐵芯設(shè)置相應(yīng)磁導(dǎo)率，將ANSYS仿真和試驗(yàn)得到的對(duì)數(shù)阻抗頻率響應(yīng)曲線相比較，證明了場(chǎng)路耦合模型建模與驗(yàn)證的正確性。
關(guān)鍵詞：靜電除塵；LCC諧振電路；場(chǎng)路耦合模型；變壓器鐵芯簡(jiǎn)化；ANSYS仿真
中圖分類號(hào)：TM401+.1 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：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
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