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1)  UVLS
低电压减载
1.
In these situation, voltage & frequency control devices,which also named UVLS & UFLS devices,are used to maintain the stable and secure operation of power system.
传统的低频低电压减载装置都是基于单机系统,如8位或16位单片机进行设计,精度低,人机界面不直观,软件方面闭锁条件不尽完善,尚不能完全满足变电站综合自动化建设的需要。
2)  under-voltage load Shedding
低压减载
1.
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。
2.
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。
3.
The uniform criterion,principle and methods of configuration for under-voltage load shedding in domestic power grids is lacking until now.
对于低压减载配置,国内至今还没有一个统一的标准、配置原则和配置方法。
3)  undervoltage load shedding
低压减载
1.
The influence of different parameters in undervoltage load shedding on rotor angle and voltage stability was compared.
介绍了PSASP仿真软件中感应电动机的三阶模型,并用其暂态稳定计算模块,从时域仿真的角度分析了感应电动机比例和低压减载对电力系统动态稳定性的影响,比较了不同参数下低压减载对功角稳定和电压稳定的影响。
2.
At present the trial-and-error method is usually used in the engineering practice to design the undervoltage load shedding scheme, however, such a design way lacks of systemization and its workload is heavy.
低压减载是解决电力系统电压失稳的重要手段之一。
3.
The mechanism of undervoltage load shedding for preventing voltage collapse is analyzed.
文章分析了低压减载防止电力系统电压崩溃的机理,比较了分散型和集中型低压切负荷方案的优缺点,并介绍了国内外使用低压减载的情况,指出如何合理地制定低压减载策略以有效地阻止电压崩溃的发生,选择低压减载的时间、地点和减载量方面应视各系统各地区的情况因地制宜。
4)  under voltage load shedding
低压减载
1.
Based on the under voltage load shedding schemes in other provincial power grids across the country,the under voltage load shedding scheme for Tianjin Power Grid is formulated.
通过对天津电网进行故障扫描分析,找出系统中的薄弱点,并在综合全国其它省网低压减载方案的基础上,提出天津电网低压减载方案。
2.
Parameter setting for under frequency load shedding (UFLS) and under voltage load shedding (UVLS) should not only ensure static security of frequency and voltage, but also suffice their transient security.
指出了低频和低压减载装置的整定不仅要满足静态和中长期动态对频率和电压的安全性要求 ,而且要满足暂态过程中的频率和电压安全约束。
3.
In order to determine the amount of under voltage load shedding(UVLS),Markov method is used to calculate the probabilities of various operations of UVLS schemes.
针对低压减载方案中切负荷量的问题,利用马尔可夫方法,计算出低压减载方案各种动作情况的概率。
5)  frequency and low voltage load shedding
低频低压减载
1.
Low frequency and low voltage load shedding schemes for East China Power Grid
华东电网低频低压减载方案研究
6)  Low open-circttit voltage
低空载电压
补充资料:安全特低电压
分子式:
CAS号:

性质:又称安全特低电压,指保持独立回路的,其带电导体之间或带电导体与接地体之间不超过某一安全限值的电压。中国国家标准规定工频电压有效值的限值为50V、直流电压的限值为120V。中国标准规定工频电压有效值的额定值有42V,36V,24V,12V和6V。特别危险环境中使用的手持电动工具应采用42V安全电压。有电击危险环境中使用的手持照明灯和局部照明灯应采用36V或24V安全电压。金属容器内、特别潮湿处等特别危险环境中使用的手持照明灯应采用12V安全电压。水下作业等场所应采用6V安全电压。具有安全电压的设备即III类设备。

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