广东电力
廣東電力
엄동전력
GUANGDONG ELECTRIC POWER
2015年
2期
61-63
,共3页
曲折接地变压器%ZnYn1 1 接线方式%核相%相量图
麯摺接地變壓器%ZnYn1 1 接線方式%覈相%相量圖
곡절접지변압기%ZnYn1 1 접선방식%핵상%상량도
zigzag grounding transformer%ZnYn1 1 connection mode%nuclear phase%phasor diagram
针对一起110 kV变电站内不同10 kV母线上的2台 ZnYn11型曲折接地变压器核相异常事件，以电压相量图为工具，对变压器高压侧相序接反进行理论分析，给出接线正常和高压侧3种相序接反情况下的核相理论值，并通过现场试验证明理论分析的正确性。将现场核相数据与理论值作对比，判断出该变电站2号变压器高压侧U、W相接反，调整该两相接线后，核相正常。
針對一起110 kV變電站內不同10 kV母線上的2檯 ZnYn11型麯摺接地變壓器覈相異常事件，以電壓相量圖為工具，對變壓器高壓側相序接反進行理論分析，給齣接線正常和高壓側3種相序接反情況下的覈相理論值，併通過現場試驗證明理論分析的正確性。將現場覈相數據與理論值作對比，判斷齣該變電站2號變壓器高壓側U、W相接反，調整該兩相接線後，覈相正常。
침대일기110 kV변전참내불동10 kV모선상적2태 ZnYn11형곡절접지변압기핵상이상사건，이전압상량도위공구，대변압기고압측상서접반진행이론분석，급출접선정상화고압측3충상서접반정황하적핵상이론치，병통과현장시험증명이론분석적정학성。장현장핵상수거여이론치작대비，판단출해변전참2호변압기고압측U、W상접반，조정해량상접선후，핵상정상。
Aiming at one abnormality event of nuclear phase of two ZnYn1 1 typed zigzag grounding transformers on different 1 0 kV bus in 1 1 0 kV substation,theoretical analysis on reversed connections of phase sequences at high voltage sides of trans-formers was carriedout and theoretical values of nuclear phase under conditions of normal connection mode and three re-versed connections of phase sequences were provided by means of voltage phasor diagram. Meanwhile,accuracy of this theo-retical analysis was verified by field test. It was judged out that U phase and W phase at high voltage sides of No.2 trans-former was reversed by comparing filed nuclear phase data and theoretical values. After adjusting connections of these two phases,the nuclear phase became normal.
