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大规模风电集中接入对电力系统暂态功角稳定性的影响(一):理论基础

DOI: 10.13334/j.0258-8013.pcsee.2015.15.011, PP. 3832-3842

Keywords: 双馈风机,暂态功角稳定,扩展等面积定则,直流潮流,电力系统

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Abstract:

该文作为2篇系列文章的第1篇,旨在从理论上分析双馈风机组成的大规模风电场集中接入对电力系统暂态功角稳定性的影响。首先,根据双馈风机的暂态特性,提出了一种适用于电力系统暂态功角稳定分析的双馈风机简化模型,并讨论了利用直流潮流计算方法研究风电接入前后系统暂态功角稳定变化趋势的合理性。其次,在双馈风机简化模型和直流潮流计算方法的基础上,利用扩展等面积定则分析了双馈风机接入两机系统后系统暂态功角稳定性的变化,提出一种判断风电接入对两机系统暂态功角稳定影响的判据。最后,在双机互联系统中进行仿真,结果表明,提出的判据具有较高的准确率。

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