actual zero point 中文意思是什麼
actual zero point
解釋
絕對零點-
A point considered to be at nominal zero potential and to which all other potentials in the circuit are referred, often, but not always, connected to the actual surface of the earth ; as a verb to connect to a ground. also called earth
電路中的一個參考點，該點電位作為標稱的零電位，其它所有電位均相對于該點而定。經常，但並非總是，將該點直接連接到地。作為動詞，指連接到地線上的過程，也稱作接地。 -
According to the present actual underground power system which neutral point is grounded through arc suppression coil in many supper big shaft, the development history and present situation of synthetic protection system used in hv flameproof switchgear are reviewed, and on the basis of analyzing the problems existed in high voltage flameproof switchgear, the selective leakage protective method based on the detecting harmonic direction of zero sequence current as well as the value of zero sequence voltage is proposed in this paper, and at the same time, harmonics extracting schematic and transforming circuit are also designed
本文深入系統地研究了基於intel80c196kb單片機控制的6kv防爆開關綜合保護系統，主要內容如下：針對大型及特大型礦井供電系統中性點普遍採用消弧線圈接地方式的現狀，回顧了國內外礦用高壓防爆開關保護系統的發展歷史，分析了目前國內高壓饋電開關保護系統所存在的問題，提出了「基於零序電壓基波啟動，五次諧波功率方向比較」的選擇性漏電保護原理，設計了相應的五次諧波提取電路和功率方向鑒別電路。
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