引用本文: | 章彬,伍国兴,黄炜昭,等.一种新的变压器磁路到电路的转换模型及多种方法的统一[J].电力系统保护与控制,2018,46(14):128-135.[点击复制] |
ZHANG Bin,WU Guoxing,HUANG Weizhao,et al.A new conversion model of transformer from magnetic circuit to electric circuit and the unification of various methods[J].Power System Protection and Control,2018,46(14):128-135[点击复制] |
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摘要: |
变压器的建模计算方法有两个关键点,一个是磁化曲线的表示,一个是磁路到电路的等值转换模型。针对第二个关键点提出了一种新的转换模型,把铁芯柱、铁轭、漏磁路径都等效成匝数为一次绕组的线圈,利用电流拆解方法表示各线圈的电流关系,利用磁通的连续性表示电动势的关系,从而得到与磁路等值的电路模型。该电路模型与对偶原理法得到的电路模型相同,并且该模型可以得到与统一磁路UMEC法相同的变压器铁芯动态自感和互感值,验证了所提新方法的正确性以及所提方法、对偶原理法、统一磁路UMEC三种方法的统一。最后给出计及变压器饱和特性的电磁仿真计算流程图。 |
关键词: 变压器 暂态模型 UMEC 对偶原理 铁芯电路模型 |
DOI:10.7667/PSPC170966 |
投稿时间:2017-06-28修订日期:2017-08-16 |
基金项目: |
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A new conversion model of transformer from magnetic circuit to electric circuit and the unification of various methods |
ZHANG Bin,WU Guoxing,HUANG Weizhao,ZHANG Ye,CAO Nan |
(Shenzhen Power Supply Bureau Co., Ltd., Shenzhen 518000, China;C-EPRI Electric Power Engineering Co., Ltd., Beijing 102200, China) |
Abstract: |
There are two key points in the modeling calculation method of transformer. One is the representation of magnetization curve, and the other one is the equivalent conversion model from magnetic circuit to electric circuit. A new conversion model is proposed to solve the second key point. It equalizes the iron core, iron yoke and magnetic flux leakage to winding coils which have the primary number of turns. And then the method of disassembly current is used to represent the relationship of each coil current and the continuity of magnetic flux is used to represent relationship of electromotive force, which obtain the electric circuit model equivalent to magnetic circuit. The circuit model is the same as that obtained by duality theory method. And the electric circuit model can obtain the same dynamic self-inductance and mutual inductance which are obtained by the unified magnetic circuit UMEC method. It verifies the validity of the proposed new method and proves the oneness of proposed method, duality method and unified magnetic circuit method. Finally, the flow chart of electromagnetic simulation considering transformer saturation is given. |
Key words: transformer transient model UMEC duality theory circuit model of iron core |