本地切換單元 的英文怎麼說
中文拼音 [běndeqiēhuàndānyuán]
本地切換單元
英文
lsu local switching unit-
Firstly, we analyze the transient and steady character of single phase high - impedance grounding fault. secondly, based on wavelet analysis on checking mutational signal and direction high frequency protection theory, utilizing zero sequence current and module current, this paper provides a new scheme including fault starting element, fault phase selection element, directional element and main criterion. this scheme can bear high impedance and is immune to system surge and frequency warp, which gets over the shortcoming of the lack of sensitivity
由於現有的保護方案無法快速有效地切除此類故障，本文在詳細分析了單相高阻接地故障的穩態和暫態特性的基礎上，從小波分析原理出發，利用小波變換檢測突變信號的原理，以零序電流、模電流等為研究對象，結合方向高頻保護的原理，設計了一套包含啟動元件、選相元件、方向元件、主保護的保護新方案。On one hand, the problem of " big horse pulls little wagon " is resolved and the working efficiency of motor is improved by optimizing way to control the stator ' s voltage ; on the other hand, an energy automatic processing system of " electric motor generates electricity " is developed, in which, the energy of the feedback of motor generating electricity is processed duly and correctly through real - time switch control of the generating electricity absorbing energy cell and is used at wellhead instead of returning power net
本課題運用新型電力電子技術和計算機控制技術研究開發了一種電機功率因數自調整及節能控制系統，一方面通過對定子電壓的尋優控制，解決了「大馬拉小車」問題，改善了電機的工作效率；另一方面開發了一種電機「倒發電」能量自動處理系統，通過倒發電吸收單元的實時切換控制，將倒發電反饋的能量及時準確地進行處理，使其在井口利用不返回電網。
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