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

doi:10.11930/j.issn.1004-9649.2016.06.053.04

Abstract

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

CLC Number:

TK264.2

YANG Tao, HUANG Xiaoming, XUAN Jiazhuo. Analysis on Application of Active Power Transducer in Thermal Power Generating Units[J]. Electric Power, 2016, 49(6): 53-56.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2016.06.053.04

https://www.electricpower.com.cn/EN/Y2016/V49/I6/53

References

[1] 钱伟康，方宗达. 影响时分割乘法器准确度的主要因素分析[J]. 上海理工大学学报，2002，24(3):268-271．
QIAN Weikang, FANG Zongda. Analysis on main factors influencing accuracy of time-division multiplier[J]. University of Shanghai for Science and Technology, 2002, 24(3): 268-271.
[2] 张宝，杨涛，项谨，等. 电网瞬时故障时汽轮机汽门快控误动作原因分析[J]. 中国电力，2014，47(5):18-22．
ZHANG Bao, YANG Tao, XIANG Jin, et al. The cause analysis of steam turbine valve control misoperation caused by grid instantaneous fault [J]. Electric Power, 2014, 47(5): 18-22.
[3] 过小玲，郑渭建. 取消东汽机组PLU保护的可行性探讨[J]. 浙江电力，2013(1):52-54.
GUO Xiaoling, ZHENG Weijian. Exploration on feasibility of canceling Dongqi unit PLU protection[J]. Zhejiang Electric Power, 2013(1): 52-54.
[4] 田丰，陈兴华，罗向东，等. 完善机组涉网控制提高电网可靠性[J]. 电力系统及其自动化学报，2010，22(1):116-119．
TIAN Feng, CHEN Xinghua, LUO Xiangdong, et al. Perfect of unit control functions with grid to improve reliability of grid [J]. Proceedings of the CSU-EPSA, 2010, 22(1): 116-119.
[5] 袁宇波．变压器差动保护理论分析[D]．南京:东南大学，2006.
[6] 景敏慧，孔霄迪，覃松涛，等. P类电流互感器饱和原因分析及对策[J]. 电力系统自动化，2007，31(21):94-97.
JING Minhui, KONG Xiaodi, QIN Songtao, et al. Cause analysis on the saturation of P class current transformers and its countermeasures [J]. Automation of Electric Power Systems, 2007, 31(21): 94-97.
[7] 樊丽琴，张保会，葛耀中. 有功功率实时计算方法及其应用分析[J]. 电力系统及其自动化学报，1994，6(1):9-18．
FAN Liqin, ZHANG Baohui, GE Yaozhong. Analysis of active power real time calculation method and its application [J]. Proceedings of the CSU-EPSA, 1994, 6(1): 9-18.
[8] 董亮，马皓，王小瑞，等. 基于滑动平均电压电流相移的数字化功率计算方法[J]. 电力系统及其自动化，2012，36(5):51-56．
DONG Liang, MA Hao, WANG Xiaorui, et al. A modified digital power calculating method based on sliding averaging and phase shifting of voltage and current[J]. Automation of Electric Power Systems, 2012, 36(5): 51-56.

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