20 kV配電網(wǎng)的中性點(diǎn)接地方式及設(shè)備選型 

黃義揚(yáng) 
廣東電網(wǎng)有限責(zé)任公司珠海供電局，廣東 珠海 519000 
 

摘 要：20 kV配電設(shè)備的選擇與系統(tǒng)中性點(diǎn)接地方式相關(guān)。分析了20 kV配電網(wǎng)采用的中心點(diǎn)不接地、經(jīng)消弧線圈接地和經(jīng)小電阻接地3種運(yùn)行方式，給出了配電網(wǎng)中電容電流的計(jì)算方法及配電網(wǎng)設(shè)備的選擇方案。在20 kV配電網(wǎng)升級(jí)改造中，選擇合理的中性點(diǎn)接地方式，有利于提高電網(wǎng)供電的持續(xù)性和有效性。
關(guān)鍵詞：20 kV配電網(wǎng)；中性點(diǎn)接地方式；設(shè)備選型
中圖分類號(hào)：TM727.2；TM862 文獻(xiàn)標(biāo)識(shí)碼：B 文章編號(hào)：1007-3175(2015)08-0044-04

Neutral Grounding Mode and Equipment Selection for 20 kV Distribution Network 

HUANG Yi-yang 
Zhuhai Power Supply Bureau of Guangdong Grid Limited Liability Company, Zhuhai 519000, China 
 

Abstract: The selection of 20 kV distribution equipment involves the system neutral grounding mode. This paper analyzed that the 20 kV distribution network adopted three kinds of operational modes including non-neutral grounding mode, grounding via arc suppression coil and grounding via small resistance. This paper gave the capacitance current calculation mode of distribution network and the selection scheme of distribution network equipment. During the process of 20 kV distribution network upgrading and rebuilding, rational selection of neutral grounding mode is in favour of raising the continuity and validity of grid power supply.
Key words: 20 kV distribution network; neutral point grounding mode; type selection of equipment

參考文獻(xiàn)
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