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太阳风暴对电网干扰的日面参数与条件

, PP. 360-366

Keywords: 太阳风暴,日冕物质抛射,地磁感应电流,日面参数

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Abstract:

由太阳磁场变化引起的太阳风暴对电网的影响是物理过程与模式极其复杂的电磁兼容问题。根据日冕物质抛射(CME)是驱动非重现性地磁暴和电网地磁感应电流(GIC)的太阳事件主因这一事实,提出研究电网GIC大小与CME的哪些参数关系密切,具备哪些条件的CME对GIC的贡献大,以便为预测对电网的影响提供依据。利用23太阳周广东岭澳核电站几次磁暴的GIC监测数据,以及太阳日球天文台/大视角分光日冕仪(SOHO/LASCO)的CME观测资料,研究了电网GIC大小与CME角宽度、初始速度、日面位置、加速度参数的关系,以及突发很大GIC的CME太阳源条件与原因。结果表明,电网GIC事件及大小与CME日面参数密切相关,但并不是单个参数能独立驱动的,CME的初始速度是对地CME能引起较大电网GIC的关键参数。

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