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WEC Condition Monitoring Based on SCADA Data Analysis

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WEC Condition Monitoring Based on SCADA Data Analysis

第三十届中国控制会议

作者： GUO Peng~(1,2) 1.school of Control and Computer engineering,north china electric power university,beijing 102206,P.R.china 2.Institute for energy and Environment,university of Strathclyde,Glasgow,UK,G1 1XW

＜正＞Condition Monitoring（CM） can greatly reduce the maintenance cost for a Wind energy Converter（WEC）.In this paper,history data of Supervisory Control and Data Acquisition（SCADA） system is analyzed to detect the incipient failure of WEC generator bearing.A new condition monitoring method based on the Nonlinear State Estimate Technique（NSET） is *** is used to construct the normal behavior model of the generator bearing *** the generator bearing has an incipient failure,the residuals between NSET model estimates and the measured generator bearing temperature will become *** the residual exceeds the predefined thresholds,an incipient failure is *** of a manual drift added on the historical SCADA data for a WEC generator bearing demonstrates the effectiveness of this new condition monitoring method.

关键词： Condition monitoring Nonlinear State Estimate Technique(NSET) SCADA data Residual analysis WEC generator bearing.

Simple Gain-Scheduled Water Level Control for Nuclear Steam Generator

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Simple Gain-Scheduled Water Level Control for Nuclear Steam ...

第二十九届中国控制会议

作者： TAN Wen,ZHANG Hongxia school of Control&Computer engineering,north china electric power university,beijing 100206,P.R.china

A simple gain-scheduled water level control system for a nuclear steam generator（SG）is *** control system consists of a feedback controller and a feedforward *** feedback controller is of first order,the feedforward controller is of second order,and parameters of the two controllers are directly related to the parameters of plant model thus scheduling is easy to implement in *** performance of the feedback controller and the feedforward controller can be tuned on-line with the two tuning parameters of the *** with a single robust controller and a multi-model controller,the proposed gain-scheduled controller can achieve good performance at both low and high power operations.

关键词： Nuclear steam generator Water level control Gain-scheduled control Internal model control(IMC) Feedforward control

Influence of HRT in a PTFE Membrane Bioreactor

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Influence of HRT in a PTFE Membrane Bioreactor

2012年环境污染与大众健康学术会议

作者： Houbo Qi 1 , Xiaowen Du 2 , Jiqiang Li 2 , Wei Li 2 1 school of Nuclear Science and engineering, 2 Sino-Canada Resources and Environmental Research Academy north china electric power university beijing,102206, china.

Influence of hydraulic retention time （HRT） on COD and ammonia nitrogen removal was studied in an UASB/anoxic/aerobic membrane bioreactor with fixed recycle rates, according to the high COD, low biodegradability of landfill leachate. The results showed a good effluent quality of COD and turbidity by using UASB/anoxic/aerobic membrane bioreactor treatment. The HRTs were varied between 10and 15 h. when HRT was 10h, 12.8h and 15h, the average removal efficiency of COD got to 88.52%, 94.96% and 90.37% respectly. The removal showed a first increased and then slowly decreased trend, and met maximum （94.96%） at 12.8h. In terms of ammonia nitrogen removal, the average removal increased according to the increasing HRTs, arriving to 78.68%, 98.08%, and 98.96% respectly. The favorable HRTs for combined optimal COD and ammonia nitrogen removal were found to be 12.85h.

关键词： PTFE membrane module MBR HRT removal efficiency

Technology Spillover and Licensing Strategy of Patentee

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Journal of Southwest Jiaotong university(English Edition) 2007年第4期15卷 324-330页

作者：郭红珍罗国亮 school of Business Administration North China Electric Power University

The optimal license proportions with and without technology spillover are analyzed with a game-theoretical approach when a patent-holding firm licensed non-drastic process innovation to his incumbent rivals by means of a first price sealed bid auction. The optimal strategy is obtained through solving the game by backward induction. It is found that the range of optimal license proportion is narrower when there is spillover compared to the no spillover case.

关键词： Game theory Auction licensing Technology spillover

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基于改进熵权TOPSIS法的输电项目外部环境分析

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水电能源科学 2010年第2期28卷 152-154页

作者：董军马博华北电力大学能源与电力经济研究咨询中心

针对评价输电项目外部环境影响尚无一套完整的评价方法,基于指标选取原则分析了输电项目对外部环境的影响要素,选取代表性指标并引入改进熵权逼近理想解的排序方法(TOPSIS)评价了输电项目对外部环境的影响。实例结果表明,该方法评价结... 详细信息

针对评价输电项目外部环境影响尚无一套完整的评价方法,基于指标选取原则分析了输电项目对外部环境的影响要素,选取代表性指标并引入改进熵权逼近理想解的排序方法(TOPSIS)评价了输电项目对外部环境的影响。实例结果表明,该方法评价结果合理、客观、实用、易于掌握,弥补了传统TOPSIS评价法的不足,为电网建设项目投资提供决策依据。

关键词：输电项目评价方法外部环境熵权逼近理想解的排序方法

基于k-trajectory算法的电力线巡检机器人的轨迹平滑方法

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系统仿真学报 2009年第12期21卷 3698-3700页

作者：柳长安刘伟刘春阳华北电力大学计算机科学与技术学院北京102206

研究了一种电力线路巡检飞行机器人轨迹平滑的方法。首先,利用坐标变换将机器人在三维空间中的运动映射到二维平面上;其次,在符合飞行机器人动力学规律的基础上,阐述了在k-trajectory算法基础上进行轨迹平滑的方法,分析了三种情况下机... 详细信息

研究了一种电力线路巡检飞行机器人轨迹平滑的方法。首先,利用坐标变换将机器人在三维空间中的运动映射到二维平面上;其次,在符合飞行机器人动力学规律的基础上,阐述了在k-trajectory算法基础上进行轨迹平滑的方法,分析了三种情况下机器人的飞行轨迹;最后,通过计算机仿真实验证明了该方法的正确性和有效性。

关键词：电力线路巡检飞行机器人轨迹平滑 k-trajectory算法计算机仿真

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发电机定子绕组端部电磁力特性与鼻端扭矩计算

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振动．测试与诊断 2014年第5期34卷 920-925,980页

作者：万书亭姚肖方豆龙江华北电力大学能源动力与机械工程学院保定071003 中国核工业集团海南核电有限公司海口570100

针对大型汽轮发电机端部结构,提出了采用镜像原理、比奥萨格尔定律和叠加原理计算定子绕组端部电磁力密度解析式的方法。以国产600MW汽轮发电机定子绕组端部为分析对象,分别对一个极距内定子端部绕组在出槽口直线段、渐开线段和鼻端等... 详细信息

针对大型汽轮发电机端部结构,提出了采用镜像原理、比奥萨格尔定律和叠加原理计算定子绕组端部电磁力密度解析式的方法。以国产600MW汽轮发电机定子绕组端部为分析对象,分别对一个极距内定子端部绕组在出槽口直线段、渐开线段和鼻端等不同位置处的轴向、径向、切向和合成的电磁力密度进行计算与分析。结果表明,各相绕组内线棒所受的轴向、径向、切向电磁力密度和合成的最大值出现的位置是有规律的,一般位于相带交界处,相带始端或相带末端,并给出了在出槽口部分、渐开线部分和鼻端部分所受力最大值及其位置。计算了鼻端所受的扭矩,并找出了最大扭矩出现的位置,为定子绕组端部的绑扎固定和在线监测提供了参考。

关键词：汽轮发电机定子绕组端部电磁力扭矩

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Model Reference Output Feedback Tracking Control Design for Switched Linear Systems with Time Delay

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Model Reference Output Feedback Tracking Control Design for ...

2010 Chinese Control and Decision Conference

作者： Xiao-Bing Kong,Qing-Kui Li,Xiang-Jie Liu,and Miao-Miao Ma school of Control Science and Computer engineering north china electric power university beijing,102206,P.R.china

＜正＞Model reference output feedback tracking control design for switched linear systems with time-varying delay is investigated in this *** possibility of designing switching control law based on measured output instead of the state information is considered when the states are not *** dwell time method is utilized to the stability analysis and controller design for switched linear time-varying delay *** to existing results, the Variation-of-constants formula is *** introducing free weighting matrix scheme and choosing a reduced piecewise Lyapunov functional,the difficulties of the tracking control problem are decreased compare to existing results.

关键词： model reference tracking switched time-delay systems linear matrix inequality

Application of Wavelet Analysis Theory in Storage energy System of Lithium Battery

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Application of Wavelet Analysis Theory in Storage Energy Sys...

第三十届中国控制会议

作者： HAN Xiaojuan~1,CHEN Xiaojun~1,LI Jianlin~2,HUI Dong~2 1.Control and Computer engineering College,university of north china electric power,beijing 102206,P.R.china 2.china electrical engineering & New Material Department,china electric power Research Institute,beijing,100192,P.R.china

＜正＞The group technology is the bottleneck of large-scale lithium battery storage energy *** estimate of residual capacity of SOC（state of charge） is an important method to realize large-scale group technology and the resistance of battery is a major index evaluating *** analysis theory is used for equivalent circuit model of lithium battery aiming at the characteristics of output signal with gaussian white noise when the lithium battery is discharged or *** output of current signal and voltage signals in lithium battery are decomposed into multi-scale functions by choosing the optimum wavelet base function to realize filter processing of noise signals,and then the filtered signals be reconstructed to obtain more accurate battery *** with the traditional filtering method（LMS adaptive method）,wavelet filtering method provided in this paper can effectively remove interference signals and realize accurately estimate of SOC for lithium battery in large-scale battery storage energy system with certain practical significance for group technology.

关键词： Wavelet analysis Battery resistance SOC Equivalent circuit model