發(fā)布時(shí)間：2018-05-17 09:27

  本文選題：虛擬同步發(fā)電機(jī) + 電壓源型換流器　； 參考：《中國(guó)電機(jī)工程學(xué)報(bào)》2017年02期

【摘要】：隨著新能源并網(wǎng)的增加,現(xiàn)有并網(wǎng)逆變器采用的直接電流控制無(wú)法有效跟蹤電網(wǎng)電壓。虛擬同步發(fā)電機(jī)(virtual synchronous generators,VSG)技術(shù)通過(guò)模擬同步發(fā)電機(jī)運(yùn)行機(jī)制,改善了系統(tǒng)穩(wěn)定性,成為解決分布式電源高滲透率問(wèn)題的有效方案之一。然而,虛擬同步發(fā)電機(jī)存在同步頻率諧振現(xiàn)象,容易引發(fā)功率振蕩,導(dǎo)致系統(tǒng)不穩(wěn)定。該文分析電磁磁鏈的動(dòng)態(tài)過(guò)程;通過(guò)建立虛擬同步發(fā)電機(jī)的寬頻域功率動(dòng)態(tài)耦合模型,發(fā)現(xiàn)有功 無(wú)功的功率耦合效應(yīng)會(huì)加劇同步頻率諧振;基于同步頻率諧振的產(chǎn)生機(jī)理,采用有源阻尼控制的策略能有效抑制該諧振問(wèn)題。最后,通過(guò)搭建實(shí)驗(yàn)平臺(tái),驗(yàn)證虛擬同步發(fā)電機(jī)中的同步頻率諧振現(xiàn)象、有功 無(wú)功動(dòng)態(tài)耦合效應(yīng)正確性及阻尼抑制策略的有效性。
[Abstract]:With the increase of new energy, the current direct current control of grid-connected inverters can not effectively track the grid voltage. Virtual synchronous generators (VSGs) technology improves the stability of the system by simulating the operation mechanism of the synchronous generators and becomes one of the effective solutions to solve the problem of high permeability of distributed power supply. However, the synchronous frequency resonance exists in the virtual synchronous generator, which can easily lead to power oscillation and lead to the instability of the system. In this paper, the dynamic process of electromagnetic flux is analyzed, and by establishing the power dynamic coupling model of virtual synchronous generator in wide frequency domain, it is found that the power coupling effect of active power and reactive power will aggravate the synchronous frequency resonance, and based on the generation mechanism of synchronous frequency resonance, The active damping control strategy can effectively suppress the resonance problem. Finally, the experiment platform is built to verify the synchronous frequency resonance phenomenon in virtual synchronous generator, the correctness of active and reactive power dynamic coupling effect and the effectiveness of damping suppression strategy.
【作者單位】： 浙江大學(xué)電氣工程學(xué)院;
【分類(lèi)號(hào)】：TM464

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1 彭仁杰;電動(dòng)賽車(chē)用大功率永磁電機(jī)的研究[D];廣東工業(yè)大學(xué);2015年

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本文編號(hào)：1900842