Research on the Earth Pressure Theory and Reinforcement Load Reduction for the Culverts Beneath High Fill;
山區(qū)公路高填方涵洞土壓力理論及加筋減載研究
Presented in this paper are a method of reinforcement load reduction for highway culverts under high fills and a new concept of reinforcement load reduction bridge.
提出了高填方涵洞加筋減載方法及加筋橋減載概念,用模型試驗(yàn)證明了高填方涵管加筋減載的有效性、加筋減載的合理布筋方式、影響加筋減載效果的因素。
A new method of load reduction by reinforcement bridge for highway culvert beneath high filling is presented in the paper.
提出了高填方涵洞加筋橋減載方法及加筋橋減載原理,通過(guò)模型試驗(yàn)證明了高填方涵洞加筋橋減載的有效性及影響加筋橋減載效果的因素。
The unloading construction is designed in the pulling force at the main shaft side.
通過(guò)對(duì)立軸錘式破碎機(jī)立軸側(cè)拉力的計(jì)算,分析了立軸錘式破碎機(jī)主軸軸承易損的原因,設(shè)計(jì)了立軸錘式破碎機(jī)立軸側(cè)拉力的減載結(jié)構(gòu),該減載結(jié)構(gòu)減少了對(duì)主軸軸承的作用力,解決了主軸軸承易損的問(wèn)題。
Study on united under-frequency load shedding scheme of China Southern Power Grid based on frequency security quantitative analysis;
基于頻率安全定量分析的南方電網(wǎng)聯(lián)合低頻減載方案
Development and application of power system under-frequency load shedding analysis software package;
電力系統(tǒng)低頻減載分析軟件包的開(kāi)發(fā)和應(yīng)用
Study on optimal setting of under-frequency load shedding in power systems;
電力系統(tǒng)低頻減載優(yōu)化研究
The performance of the out-of-step system and the stability of the electrical isolated islands after separation are analyzed,especially considering the impact of under-voltage load shedding and different separation location.
用BPA(Bonneville Power Administration)程序?qū)δ戏诫娋W(wǎng)目前配置的失步解列系統(tǒng)的定值設(shè)置及協(xié)調(diào)配合進(jìn)行研究,特別是研究了低壓減載的影響以及判出失步后解列不同斷面的效果。
The paper analyzed two under-voltage load shedding schemes in Tokyo Electric Power Company and Hydro Quebec, Canada, and studied the principle and actual working condition of two typical distributed and concentrated under-voltage load shedding installations in the world.
文章對(duì)東京電力公司和加拿大魁北克水電系統(tǒng)兩種低壓減載方案進(jìn)行了分析,研究了在國(guó)際上兩種比較典型的分布式和集中式低壓減載裝置的原理和實(shí)際工作情況。
In this paper the definition of over shedding caused by under frequency load shedding and the concept of urgent step are given, the reasons causing over shedding are classified.
文章給出了低頻減載過(guò)切的定義 ,并對(duì)過(guò)切原因進(jìn)行了分類。
Undoubtedly, the under frequency load shedding (UFLS) is an effective method to restrain frequency drop and most of UFLS devices use pre specified step to shed loads according the measured value of frequency.
低頻減載裝置無(wú)疑是一種抑制頻率下降的有效方法 ,它依據(jù)測(cè)量到的頻率值 ,按輪次分步驟地減負(fù)荷。
Existing UFLS(under frequency load shedding)function is always contained in line protection device,when the system frequency reduce to the threshold of frequency setting,with the slip and low-voltage block,UFLS function act to reduce system load and keep the balance of power system.
現(xiàn)有的低頻減載功能一般集成在出線保護(hù)裝置中,當(dāng)檢測(cè)到系統(tǒng)頻率降低到整定門檻以下,在滑差閉鎖和低電壓閉鎖的糾正下,動(dòng)作切除該條出線,減少系統(tǒng)負(fù)荷,以期滿足系統(tǒng)功率平衡,維持系統(tǒng)頻率穩(wěn)定。