HAND IN HAND FOR THE MUTUAL FUTURE

正Zhengzhou Yufa(Group)Co.,Ltd.,the largest white corundum manufacturer in China,the enterprise drafting and revising the national standard of white fused alumina abrasive GB/T 2479-2008,one of top 10 corundum manufacturer in Chinese abrasives industry,has been entitled asOutstanding Refractories Enterprise in Henan,The     

活性染料复配技术的进展

通过复配可以提高染料的提升力、耐碱性、匀染性、染色牢度等。介绍了活性染料的复配机理,并从近几年印染行业推出的节能减排的染色工艺方面对活性染料的复配拼混技术进行了评述。     

重载变电站的电容器组配置

重载变电站无功缺额问题比较普遍,典型设计中所确定的尢功补偿方式不满足降损与调压的要求。因此,通过计算末端重载变电站随负倚的变化对无功的需求,分析对母线电压的影响和经济效益,提出提高补偿率、分组补偿的方法。     

安装阶段防止大型变压器绝缘受潮的措施

针对大型电力变压器在安装阶段出现的绝缘受潮问题,介绍变压器绝缘受潮的物理过程,提出了有效防止绝缘受潮的方法。     

Research and Demonstration of Direct Air-Cooling System for 600-MW Fossil-Fired Power Plants

Given the distribution feature of resources such as coal and water, the requirements for the development of Chinese power industry, and the fact of monopoly by foreign companies, it is very necessary and significant to independently research and develop air-cooling technologies. Through experimental research, simulative calculation, process and equipment development, field tests and a demonstration project, the design and operation technologies for air-cooling system are grasped and relevant key equipment is developed. The results of the demonstration project show that the technical indicators for the air-cooling system have met or exceeded the design requirements. Part of the research results have been incorporated into the relevant national design standards. The technologies developed have been applied to more than 23 sets of thermal power units of or above 600 MW in China.     

对大型汽轮发电机组承受失步振荡能力的要求

恰当处理发电机失步振荡,是机网协调的重要问题。文中讨论了汽轮发电机承受短时失步振荡的必要性和可能性。根据国内外的大量研究结论和运行经验,建议当系统振荡中心位于发电机变压器组范围内时,宜立即将发电机解列;当振荡中心位于机组外时,要求新订购机组能承受短时间失步振荡,例如15～20个振荡周期或相应时间。     

集合式电容器的缺陷分析处理

本文对一台绝缘油色谱异常的集合式电容器进行了分析,找出原因,提出解决方法,通过实践证明集合式电 容器运行中应增加绝缘油色谱试验项目。     

地区电网应对各种事故的策略

本文研究各种电网事故发生的原因,提出综合性的应对策略,从地区电网的角度加强继电保护和安全稳定自动装置的优化配置;采用先进可靠的调度自动化系统对电网进行密切监控;保证正常情况下系统的安全稳定运行和事故时能够及时正确地切除故障,防止事故扩大。     

母差保护出现的问题及处理过程

本文介绍了220kV金砂变电站Ⅱ期扩建工程投运中220kV母差保护出现的问题及处理过程,指出了继电保护 设计、安装、调试、维护工作的重要性,对每个环节都需要认真处理。