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火电厂输煤系统湿式除尘机组容易出现堵塞现象,液位控制器经常产生误动和拒动。通过分析湿式除尘机组不能正常投入运行的原因,采用CCJ/A-GZ系列除尘器的先进技术,对多管式除尘器进行了改造。 相似文献
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M. Kezunovic 《Electric Power Systems Research》1981,4(3):167-180
This paper gives an overview of the digital algorithms and systems for protective relaying. First, digital relaying algorithms are discussed. Classification and categorization of the proposed algorithms are given. The major classes are: transmission line protection, transformer protection, bus protection, and generator protection. The categories correspond to the different schemes used for the signal processing. The discussion of algorithms is concluded by giving some basic results related to the comparison and selection of the algorithms. A particular methodology is proposed if one is to investigate and compare digital algorithms using more elaborate quantitative techniques. The second major topic discussed is related to the digital implementations of the protective relays. Major philosophies used in designing digital relaying systems are outlined. These philosophies include the following design approaches: a centralized relaying system using a minicomputer; a decentralized relaying system where each protection function is implemented using a separate microprocessor; an integrated relaying system where a number of dedicated microprocessors are connected together in a protection system; an integrated substation control and protection system. Finally, expected trends in the areas of algorithm developments and system implementations are indicated. 相似文献
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大唐三门峡发电有限责任公司的3#机组给水早期采用还原性全挥发处理方式,存在流动加速腐蚀,机组投运不到2年,水冷壁垢量就接近化学清洗标准,现在改用给水加氧处理技术.介绍给水加氧处理技术,分析应用效果.与还原性全挥发处理方式比较,加氧处理技术具有锅炉受热面结垢速率低、化学清洗周期短、精处理混床运行周期长、自用水率低以及化学加药量小等优点,提高了机组运行的经济性和安全性. 相似文献
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在通信系统中,高功率放大器因为其非线性的特性,导致产生频谱再生和邻道干扰.因而需要采用线性技术来克服这一问题,预失真技术是一种广泛使用的线性化技术,而数字预失真逐渐成为研究的热点.本文系统地介绍了基于极坐标查找表法的数字预失真技术,从理论上介绍了数字预失真的线性化原理,并分析了此技术查询表的索引方式和自适应刷新算法.最后采用ADS软件对整个系统进行了仿真,仿真结果表明,该技术可达到20 dB的三阶交调压缩性能,证明此预失真技术对线性化确实有很大的改善. 相似文献
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挖掘火电机组的节能潜力是电力工业可持续发展的必然选择.从火电机组供电标煤耗指标的分析人手,提出了挖掘火电机组节能潜力的主要环节和措施;结合火电机组实时信息系统的建设,提出运行能量损失分析与主辅机设备优化等领域的基本方法和研究成果. 相似文献
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The penetration of renewable sources (particularly wind power) in to the power system network has been increasing in the recent years. As a result of this, there have been serious concerns over reliable and satisfactory operation of the power systems. One of the solutions being proposed to improve the reliability and performance of these systems is to integrate energy storage devices into the power system network. Further, in the present deregulated markets these storage devices could also be used to increase the profit margins of wind farm owners and even provide arbitrage. This paper discusses the present status of battery energy storage technology and methods of assessing their economic viability and impact on power system operation. Further, a discussion on the role of battery storage systems of electric hybrid vehicles in power system storage technologies had been made. Finally, the paper suggests a likely future outlook for the battery technologies and the electric hybrid vehicles in the context of power system applications. 相似文献
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介绍了汽轮机辅汽预暖技术在华能南通电厂350 MW机组上的应用.通过热力系统适当的技术改造,实现了辅汽预暖的功能.机组实际启动过程表明:采用辅汽预暖技术后,在保证设备安全的前提下,加快了机组冷态启动速度,达到了节能降耗的目的. 相似文献
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介绍了火电机组仿真技术的发展概况,以及它在计算机网络技术、虚拟DPU技术、图形化建模技术、超临界机组的建模技术、虚拟现实技术应用等方面取得的进展、实用意义及技术关键。 相似文献
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This article is the first of a four-part series by the authors that treats various aspects of digital signal processing applied to partial discharge detection. It is shown that manufacturers and users of high-voltage apparatus are interested in on-site, off-line and on-line analysis of partial discharge to identify and locate defects in insulation systems 相似文献
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现场总线技术在火电厂机组控制中的应用分析 总被引:2,自引:0,他引:2
现场总线技术以双向数字化通信的鲜明特征和优点广泛应用于各过程工业领域,并在电厂局部取得了成功应用.现场总线控制系统和设备具有开放性好、高度信息化、高度分散和低成本的特点,通过对设备状况和工程应用的分析认为,把现场总线技术集成在主控制系统中应是目前阶段较适宜的设计方案,对于重要的保护及控制回路仍采用传统硬接线连接.探讨了现场总线技术的应用方案;从技术和经济等方面分析了现场总线控制系统和设备应用于火电厂机组控制的可行性;指出了设计中应注意的问题. 相似文献
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结合国内外配网带电作业开展情况,在保证人身安全基础上,以系统不停电或少停电为目标,提出了10 kV带电组立电杆新技术,制定了现场操作规程。 相似文献
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压缩机容量调节新技术--数码涡旋技术 总被引:2,自引:0,他引:2
本文阐述了一种压缩机容量调节的新技术——谷轮Digital ScrollTM(谷轮数码涡旋技术)。该新技术和传统的变频器技术根本不同。此技术独特,可靠,极易应用。数码涡旋压缩机的容量调节是通过对“负载状态”和“卸载状态”时间平均的方法实现的。本文从物理学角度解释了数码涡旋压缩机达成上述状态的方法。文章也阐述了使用数码涡旋技术的优点和技术在使用R410A的喷汽增焓技术方面的未来发展。 相似文献
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论述数字滤波技术在电池组智能巡检仪中的应用;分析了级联数字滤波器的性能,并给出仿真算例,仿真结果表明该滤波器能达到电池组智能巡检仪的数字抗干扰要求,有应用推广的价值。 相似文献
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Rory A Cooper 《IEEE engineering in medicine and biology magazine》2008,27(2):10-11
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