中国电力 ›› 2016, Vol. 49 ›› Issue (6): 53-56.DOI: 10.11930/j.issn.1004-9649.2016.06.053.04

• 发电 • 上一篇    下一篇

火电机组有功功率变送器应用分析

杨涛,黄晓明,宣佳卓   

  1. 国网浙江省电力公司电力科学研究院,浙江 杭州 310014
  • 收稿日期:2016-01-15 修回日期:2016-06-16 出版日期:2016-06-16 发布日期:2016-06-16
  • 作者简介:杨涛(1978-),男,山东济宁人,高级工程师,从事电力系统及其自动化研究。E-mail: power_forward@139.com

Analysis on Application of Active Power Transducer in Thermal Power Generating Units

YANG Tao, HUANG Xiaoming, XUAN Jiazhuo   

  1. Zhejiang Electric Power Test Research Institute, Hangzhou 310014, China
  • Received:2016-01-15 Revised:2016-06-16 Online:2016-06-16 Published:2016-06-16

摘要: 对火电机组常用的模拟式功率变送器进行了暂态特性分析,发现各种型号的模拟式功率变送器均不具备良好的暂态性能,在电网发生故障或扰动时其输出信号将发生畸变,可能导致机组汽门误动作。通过分析指出了响应时间过长与内部小电流互感器(TA)饱和是模拟式功率变送器输出波形畸变的原因。介绍了一种新型的功率变送装置,对功率变送器应用及改造中存在的问题进行了分析,指出当机组DEH系统中含有汽门快关功能时,须用新型的功率变送装置替代传统的功率变送器,以解决汽门快关误动作问题。

关键词: 火电机组, 有功功率变送器, 暂态性能

Abstract: Through the analysis on the transient characteristics of analog power transducer commonly used in thermal power generating units, it is discovered that none of the analog power transducers of various types have exhibited satisfactory transient performance. In the event of faults or disturbances in the power grid, their output signal may be distorted, which will probably lead to valve misoperation. In addition, the analysis concludes that the long response time and small internal AT saturation are the root causes of the analog power transducer output waveform distortion. Therefore, a new type of power transmitting device is introduced. Based on the analysis on the existing problems in power transducer applications and alterations, it is recommended to replace the traditional power transducer with the new type of power transmitting device to prevent valve misoperation if the valve fast operation functionality is included in the unit DEH system.

Key words: thermal power generating unit, active power transducer, transient characteristic

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