本文選題：虛擬同步發(fā)電機 + 電壓源型換流器　； 參考：《中國電機工程學報》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法有效跟蹤電網(wǎng)電壓。虛擬同步發(fā)電機(virtual synchronous generators,VSG)技術(shù)通過模擬同步發(fā)電機運行機制,改善了系統(tǒng)穩(wěn)定性,成為解決分布式電源高滲透率問題的有效方案之一。然而,虛擬同步發(fā)電機存在同步頻率諧振現(xiàn)象,容易引發(fā)功率振蕩,導致系統(tǒng)不穩(wěn)定。該文分析電磁磁鏈的動態(tài)過程;通過建立虛擬同步發(fā)電機的寬頻域功率動態(tài)耦合模型,發(fā)現(xiàn)有功 無功的功率耦合效應會加劇同步頻率諧振;基于同步頻率諧振的產(chǎn)生機理,采用有源阻尼控制的策略能有效抑制該諧振問題。最后,通過搭建實驗平臺,驗證虛擬同步發(fā)電機中的同步頻率諧振現(xiàn)象、有功 無功動態(tài)耦合效應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】： 浙江大學電氣工程學院;
【分類號】：TM464

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1 彭仁杰;電動賽車用大功率永磁電機的研究[D];廣東工業(yè)大學;2015年

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本文編號：1900842