江西煤炭科技
江西煤炭科技
강서매탄과기
JIANGXI COAL SCIENCE & TECHNOLOGY
2012年
2期
122-124
,共3页
变压器%中性点%不接地%煤矿%高压%漏电%整定
變壓器%中性點%不接地%煤礦%高壓%漏電%整定
변압기%중성점%불접지%매광%고압%루전%정정
transformer%neutral point%ungrounded%high pressure%electricity leakage%setting
煤矿井下高压漏电保护动作值设定偏小或偏大,使保护装置误动或拒动。本文分析探讨煤矿井下变压器中性点不接地系统零序电流动作值和零序电压动作值的整定方案,从保证动作灵敏性和可靠性出发,确定了高压漏电保护整定方法,从而实现了煤矿井下高压漏电保护动作值的正确整定。
煤礦井下高壓漏電保護動作值設定偏小或偏大,使保護裝置誤動或拒動。本文分析探討煤礦井下變壓器中性點不接地繫統零序電流動作值和零序電壓動作值的整定方案,從保證動作靈敏性和可靠性齣髮,確定瞭高壓漏電保護整定方法,從而實現瞭煤礦井下高壓漏電保護動作值的正確整定。
매광정하고압루전보호동작치설정편소혹편대,사보호장치오동혹거동。본문분석탐토매광정하변압기중성점불접지계통령서전류동작치화령서전압동작치적정정방안,종보증동작령민성화가고성출발,학정료고압루전보호정정방법,종이실현료매광정하고압루전보호동작치적정학정정。
The changes in actuating value setting of underground high--voltage leakage protection would lead to malfunction or resist--operation of protection device. The paper probes into the zero--sequence current actua- ting value in ungrounded neutral system of transformer and its setting schemes, and determines the setting method of high--voltage leakage protection depending on the sensibility and reliability of protection operation, which helps to realize the correct actuating value setting of the underground high--voltage leakage protection.
