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基于移頻理論的多模式VBR異步電機(jī)仿真建模
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國網(wǎng)寧夏電力有限公司科技項(xiàng)目(PDB11202000858)


Multi-mode VBR Induction Machine Model Based on Frequency Shifting Theory
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    摘要:

    為滿足對(duì)異步電機(jī)暫穩(wěn)態(tài)過程準(zhǔn)確,、快速仿真的需要,,提出了一種基于移頻理論的多模式voltage-behind-reactance (VBR)異步電機(jī)仿真模型。首先,,基于希爾伯特變換,,將電氣信號(hào)轉(zhuǎn)換為相應(yīng)的解析信號(hào);其次,進(jìn)一步引入移頻變換技術(shù),,分別構(gòu)建多尺度VBR與近似VBR異步電機(jī)移頻仿真模型,。最后,通過不同的移動(dòng)頻率和不同的VBR模型之間的切換,,實(shí)現(xiàn)準(zhǔn)確,、高效的多時(shí)間尺度暫態(tài)和穩(wěn)態(tài)過程仿真。當(dāng)移動(dòng)頻率等于零時(shí),,該模型與傳統(tǒng)電磁暫態(tài)近似VBR電機(jī)模型等價(jià),,可刻畫高頻暫態(tài)過程,且電機(jī)模型具有恒定阻抗矩陣,,大幅度提升了仿真效率,;當(dāng)移動(dòng)頻率等于系統(tǒng)基波頻率時(shí),采用多尺度VBR移頻暫態(tài)模型,,模型可使用大步長仿真,,獲得低頻暫態(tài)和穩(wěn)態(tài)的包絡(luò)曲線。仿真結(jié)果表明,,所提出的模型可實(shí)現(xiàn)準(zhǔn)確和高效的異步電機(jī)多時(shí)間尺度暫態(tài)與穩(wěn)態(tài)仿真,。

    Abstract:

    To achieve high efficiency and accuracy of simulation, a multi-mode voltage-behind-reactance (MVBR) induction machine model was proposed based on frequency shifting theory. At first, the analytic signals were constructed by using Hilbert transform. Frequency shifting was performed, and multi-scale VBR and approximate VBR (AVBR) models were developed. Meanwhile, shift frequency was introduced as a novel parameter in the proposed MVBR model. By appropriate selection of shift frequencies, accurate and efficient multi-scale transients simulation was supported. When the shift frequency was set to be zero, MVBR model performed in the same way as AVBR model. In this mode, high-frequency transients were simulated accurately with small time-step sizes. The conductance matrix of machine model remained constant, thereby contributing to improvement in simulation efficiency. When the shift frequency equaled the carrier frequency, multi-scale VBR model was selected. Large time-step sizes can be used in the simulation of low-frequency transients and steady-state. The test case demonstrated the effectiveness of the proposed machine model in terms of accuracy and efficiency.

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劉科研,賈東梨,姜銘渝,夏 越,杜松懷.基于移頻理論的多模式VBR異步電機(jī)仿真建模[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2021,52(S0):360-366. LIU Keyan, JIA Dongli, JIANG Mingyu, XIA Yue, DU Songhuai. Multi-mode VBR Induction Machine Model Based on Frequency Shifting Theory[J]. Transactions of the Chinese Society for Agricultural Machinery,2021,52(S0):360-366.

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  • 收稿日期:2021-07-15
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  • 在線發(fā)布日期: 2021-11-10
  • 出版日期: 2021-12-10
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