HKII说明书分析和总结.docx

SYEC

XHK-Ⅱ型消弧线圈自动调谐及接地选线成套装置

使用说明书

（Ver.2.0C）

上 海 思 源 电 气 股 份 有 限 公 司

SHANGHAISIYUANELECTRICCO.,LTD.

目 录

一、概述·························································

1

二、技术参数···················································

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三、型号说明···················································

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四、结构及组成原理··········································

3

4-1接地变压器·········································

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4-2有载消弧线圈·······································

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4-3自动调谐及选线控制器···························

6

4-4阻尼电阻控制箱····································

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4-5中性点电压互感器·································

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4-6隔离开关·············································

9

4-7控制屏················································

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五、面板布置···················································

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六、操作说明···················································

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6-1菜单结构·············································

10

6-2菜单项说明··········································

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6-3故障及报警显示····································

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七、运行维护注意事项·······································

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7-1总则···················································

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7-2正常运行时注意事项······························

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7-3系统单相接地时注意事项························

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7-4装置异常时注意事项······························

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7-5维护注意事项·······································

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八、售后服务···················································

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九、订货须知···················································

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十、附录·························································

25

XHK-II型消弧线圈自动调谐及选线成套装置使用说明书

XHK-II型消弧线圈自动调谐及选线成套装置使用说明书

SYEC

第PAGE1

第PAGE1页

版本:

Ver.

2.0C

一、概述

随着国民经济的迅速发展和电力系统容量的不断扩大，电力电网的安全运行和供电的可靠性越来越重要，而直接影响以上两个指标的是电网中性点接地方式的选择。

长期以来，我国6～66kV的配电网大多采用中性点不接地运行方式。这种运行方式，由于在单相接地时允许短时间内带故障运行，因而大大提高了供电的可靠性。然而，随着城乡电网的大规模改造，系统对地电容电流急剧增加，单相接地后流经故障点的电流增大，容易产生过电压幅值很高的间隙性弧光接地。同时，由于电磁式电压互感器铁芯饱和时容易引起谐振过电压，导致事故跳闸率明显上升。

为了解决上述问题，不少电网采用了谐振接地方式，即在中性点装设消弧线圈，当发生单相接地时，由于消弧线圈产生的感性电流补偿了故障点的电容电流，因而使故障点的残流变小，电网能够自然熄弧，防止事故扩大，消除事故隐患。运行经验表明，消弧线圈对抑制间隙性弧光过电压及电磁谐振过电压、降低线路的事故跳闸率、减少人身伤亡和设备的