Research on the Earth Pressure Theory and Reinforcement Load Reduction for the Culverts Beneath High Fill;
山区公路高填方涵洞土压力理论及加筋减载研究
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减载方法及加筋桥减载概念,用模型试验证明了高填方涵管加筋减载的有效性、加筋减载的合理布筋方式、影响加筋减载效果的因素。
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桥减载方法及加筋桥减载原理,通过模型试验证明了高填方涵洞加筋桥减载的有效性及影响加筋桥减载效果的因素。
The unloading construction is designed in the pulling force at the main shaft side.
通过对立轴锤式破碎机立轴侧拉力的计算,分析了立轴锤式破碎机主轴轴承易损的原因,设计了立轴锤式破碎机立轴侧拉力的减载结构,该减载结构减少了对主轴轴承的作用力,解决了主轴轴承易损的问题。
Study on united under-frequency load shedding scheme of China Southern Power Grid based on frequency security quantitative analysis;
基于频率安全定量分析的南方电网联合低频减载方案
Development and application of power system under-frequency load shedding analysis software package;
电力系统低频减载分析软件包的开发和应用
Study on optimal setting of under-frequency load shedding in power systems;
电力系统低频减载优化研究
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)程序对南方电网目前配置的失步解列系统的定值设置及协调配合进行研究,特别是研究了低压减载的影响以及判出失步后解列不同断面的效果。
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.
文章对东京电力公司和加拿大魁北克水电系统两种低压减载方案进行了分析,研究了在国际上两种比较典型的分布式和集中式低压减载装置的原理和实际工作情况。
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.
文章给出了低频减载过切的定义 ,并对过切原因进行了分类。
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.
低频减载装置无疑是一种抑制频率下降的有效方法 ,它依据测量到的频率值 ,按轮次分步骤地减负荷。
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.
现有的低频减载功能一般集成在出线保护装置中,当检测到系统频率降低到整定门槛以下,在滑差闭锁和低电压闭锁的纠正下,动作切除该条出线,减少系统负荷,以期满足系统功率平衡,维持系统频率稳定。