交直流混杂模式下变压器励磁-振动特性研究

doi:10.19595/j.cnki.1000-6753.tces.180068

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Abstract An excitation-vibration harmonic response model is proposed to solve the core vibration problem of power transformer under different DC disturbances. The electromagnetic coupling state equation of transformer in AC-DC hybrid operation is established. Based on energy disturbance principle, two state variables of dynamic inductance and time-domain current are calculated. Subsequently, the identification method of exciting current is studied, and the excitation current-vibration harmonic response model is constructed. The electromagnetic characteristics of transformer is simulated in AC-DC hybrid operation. The exciting current and the core vibration acceleration are calculated under different DC disturbances. Then the harmonics of exciting current is analyzed, and the relationship between variation rule of exciting current and vibration characteristics of core is summarized. An experiment platform of 220V single-phase transformer is set up in AC-DC hybrid operation. The excitation current is identified by excitation parameter identification module, and the vibration signal of transformer core is collected by vibration monitoring module. The simulation results are compared with the experimental data to verify the correctness of the simulation model.

Key words： Transformer AC-DC hybrid nonlinear excitation core vibration

Received: 16 January 2018 Published: 26 September 2019

PACS:

TM412

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	Pan Chao
	Yi Shuangyuan
	Cai Guowei
	Zheng Yongjian

Cite this article:

Pan Chao,Yi Shuangyuan,Cai Guowei等. Excitation-Vibration Characteristics of Transformer in AC-DC Hybrid Operation[J]. Transactions of China Electrotechnical Society, 2019, 34(18): 3788-3796.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180068 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I18/3788

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