曾祥君
个性化签名
- 姓名:曾祥君
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
- 职称:-
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学科领域:
电力系统及其自动化
- 研究兴趣:
曾祥君教授,1993年本科毕业于湖南大学电气系,1996年硕士毕业于武汉水利电力大学电力系,分配到长沙电力学院从事教学及消弧线圈自动调整系统产品的研发、推广工作,1998年考入华中科技大学电力系统及其自动化专业博士研究生,在著名的陈德树教授课题组尹项根教授的悉心指导下完成博士论文《电力线路故障检测与定位新原理及其信息融合实现研究》,于2001年6月获博士学位,2003年被评为湖北省优秀博士论文。期间2000年12月至2001年9月在香港理工大学电机工程系进行合作研究。2001年3月博士毕业后,重新分配到长沙电力学院从事教学科研工作。2001年10月进入华中科技大学博士后学习站、许继电气集团公司博士后工作站在职博士后研究工作。并于2002年1月至2002年9月在香港理工大学进行合作研究。2002年9月受许继博士后工作站委派到湖南湘能许继公司进行博士后课题“输电网故障行波定位和行波保护”的研究,博士后研究期间担任湖南湘能许继公司总工程师,开发了“输电网故障GPS行波定位系统”、“基于GPS的电压互感器二次压降测量系统”、“输电网相量同步测量系统”等技术和产品, 都被鉴定为国际先进水平,并分别被评选为2004年湖南省电力公司科技进步二等奖、二等奖和三等奖,获国家中小企业技术创新基金资助。自2002年9月作为学科带头人重点参与了长沙电力学院电力系统及其自动化专业建设,领导创建了电力系统保护与控制课题组,课题组现有教师5人,研究生10人。2003年9月被推荐为长沙理工大学电气学院副院长(主持工作),2004年10月被推荐为院长,并晋升为教授,并被选为教育部新世纪优秀人才。
近几年,主持开发了消弧线圈自动调整系统、配电网接地保护装置、输电网故障行波定位系统、电网相量同步测量系统等产品,已在长沙华源电气设备厂和湘能许继公司组织生产,年产值上亿元,有效提高电力系统运行和控制水平,产生巨大的社会和经济效益。目前已有5个项目被鉴定为国际先进水平,其中电力系统暂态保护和行波定位的研究成果受到国内外著名专家的赞赏,并受英国Bath大学相关课题组的好评,专程来我校参观交流。
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成果阅读
1301
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成果数
20
曾祥君, 尹项根, 陈德树, 张哲
中国电机工程学报,2000,20(11):52~61,-0001,():
-1年11月30日
注入信号法发电机定子接地保护受定子绕组对地电容的影响,灵敏度较低,难以满足大型机组高灵敏度继电保护的要求。而采用外加小电抗器、选择合适的注入信号频率,以补偿定子绕组对地容抗、测量故障接地电阻或测量信号电压、信号电流相位差进行接地保护则可改善大型机组定子接地保护的灵敏度。计算、分析与仿真表明:该方法具有较高的灵敏度。
发电机保护, 注入信号法, 故障诊断, 高阻接地故障
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61浏览
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引用
曾祥君, XiangJun Zeng, Xianggen Yin, Deshu Chen
IEEE Power Engineering Review, March 2001,-0001,():
-1年11月30日
A principle for resonance measurement based on injectingresonant frequency signal is presented in this letter. The groundingcapacitance of lines and equipment and the grounding fault resistancecan be measured on-line in ineffectively grounded systems.Petersen-coil automatic tuning is implemented, and 100% statorgrounding fault protection for generator stator windings is also proposed.The prototype for Petersen-coil tuning has been tested on networksfor many years. In addition the new method for generator statorgrounding fault protection is verified by simulation.
Distribution systems, Petersen-coil tuning, generator protection
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【期刊论文】Fault Location Using Traveling Wave for Power Networks
曾祥君, Zeng Xiangjun, Li K.K., Liu Zhengyi, Yin Xianggen
,-0001,():
-1年11月30日
Fault location using traveling wave has been applied inextra-high voltage power grids successfully. Due to itscomplication and high cost, it is not easy for this technique to beaccepted for use in distribution system. A new traveling wavefault location system is developed simply in a cost-effective wayfor power networks (especially for distribution system) in thispaper. Two traveling wave sensors are developed to capture thecurrent traveling wave flowing from the capacitive equipment toearth and the voltage traveling waves in all three phases. Theoutputs of the sensors are then applied to the trigger and timetagging by using Global Position System (GPS) receiver. Thefault position is calculated by the traveling wave arrival times inevery power station where only one fault locator is installed. Thefault location system is tested in the power system. Testing resultsshow that the fault locator has high precision and robustness.
Fault location, Traveling-wave, Global Position System
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曾祥君, 尹项根, K.K.Li, W.L.Chan
中国电机工程学报,2002,22(12):42~46,-0001,():
-1年11月30日
受干扰、卫星失锁等因素的影响,全球定位系统(GPS)时钟难以满足高可靠性同步控制领域的要求。文中根据高精度晶振与GPS时钟精度互补的特点,采用高精度晶振对GPS时钟进行监测,建立了最小二乘估计模型,估计出GPS时钟的方差及晶振的累计误差,给出了GPS时钟误差的在线修正方法,研制出了具有较高性能价格比的高精度时钟发生装置,并成功地应用于电力系统继电保护与控制。
全球定位系统(, GPS), , 时钟, 晶振, 电力系统, 继电保护
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76浏览
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曾祥君, 尹项根, 陈浩, 魏丰, 林福昌, 陈德树, 邹建明
高电压技术,2000,26(2):56~58,-0001,():
-1年11月30日
介绍了能同步记录并分析电力系统各种扰动变化过程的GPS同步暂态录波仪及其软件系统。介绍了基于暂态录波仪的输电网故障行波定位系统。该仪器性能可靠、操作方便并通过了模拟试验。
全球定位系统, 数据采集, 故障录波
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【期刊论文】Multi-Agents Based Protection for Distributed Generation Systems
曾祥君, Zeng Xiangjun, Member IEEE, Li K.K, Senior Member IEEE, Chan W.L., Senior Member EEE, Su Sheng, Non-Member
2004 IEEE International Conference on Electric Utility Deregulation, Restructuring and Power Technologies (DRPT2004) April 2004 Hong Kong,-0001,():
-1年11月30日
As a result of deregulation, distributed generation(DG) systems with distributed generators installed in the middleor low voltage networks become popular in distribution systems.Traditional protections developed in radial systems are difficult incoordination and in protecting against high impedance fault(HIF), sometimes it may cause nuisance tripping in the DGsystems. A decentralized multi-agent based protection withcapability of HIF detection, fault location and load shedding forthe DG systems is proposed in the paper. Digital relay is designedas a relay agent which is capable of searching for informationfrom other relay agents, interacting with other relay agents andperforming tasks of protection with autonomy and cooperating.The agent based protection scheme is also presented. EMTPsimulation results show that the proposed agent based protectionscheme can remove the influence of load switching operations,protect against HIF, electric shock. The prototype of relay agentis developed, the research is now in progress on testing theprototype in dynamic power system.
Index Terms-Distributed Generator Systems, High Impedance Fault, Relay Agent, Power System Protection,
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【期刊论文】On-Site Safety Evaluation for Earth Fault in Mining Power Systems
曾祥君, Zeng Xiangjun, Member, IEEE, K. K. Li, Senior Member, W. L. Chan, and Yin Xianggen
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 39, NO.6, NOVEMBER/DECEMBER 2003,-0001,():
-1年11月30日
Many mining power systems utilize ineffectivelygrounded sources to restrict the residual current of single-phaseearth fault in order to reduce outage and shock hazard. Inpractice, with the system expansion, topology changing, andinsulation aging, the potential residual current and zero-sequencevoltage for earth fault vary dynamically and some arcing earthfaults can easily cause over-voltage and induce multiple faults. Inorder to improve the system safety, on-site condition monitoring,safety evaluation, and preventive maintenance for earth fault areproposed in this paper. Some techniques for online parametersmeasurement based on resonance-measurement principle arepresented. Power system operation states are classified intonormal secure state, alert state, incipient fault state, and faultstate. Some security enhancement methods (preventive action andremedial action) for each state are implemented. The prototypefor safety evaluation has been developed and installed in industrypower systems for several years.
Index Terms-Condition monitoring, earth fault, mining power system, preventive maintenance, safety e, v, a, l, uation.,
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【期刊论文】Some Ground Fault Protection Schemes Implemented on FTU for Industrial Power Systems
曾祥君, Zeng Xiangjun, Li K.K, Guo Zigang, and Su Sheng
,-0001,():
-1年11月30日
Many industrial power systems have been operatedwith floating neutral or high resistance grounding. Withtraditional fault detection methods, based on zero sequencecurrent, it is difficult to satisfy the requirement of distributionautomation (DA). In order to improve this, some noveltechniques for ground fault feeder detection are presented in thispaper, and they are implemented by using the informationobtained from the feeder terminal unit (FTU). The faulty feederis identified with fuzzy analysis. These protection schemes havebeen verified by EMTP simulation. A prototype has beendeveloped and tested in a dynamic power system. Results showthat these proposed protection schemes have high sensitivity androbustness to detect all kinds of ground faults.
Distribution automation (, DA), , feeder terminal unit (, FTU), , faulty feeder detection, grounding protection.,
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【期刊论文】Some Novel Techniques for Improving Power Quality in Distribution Networks
曾祥君, Zeng Xiangjun, MIEEE, Li K.K, Senior MIEEE, Chan W.L., Yin Xianggen, Non-Member
2004 IEEE International Conference on Electric Utility Deregulation, Restructuring and Power Technologies (DRPT2004) April 2004 Hong Kong,-0001,():
-1年11月30日
Power quality is influenced by neutral grounding methods in distribution systems. Optimization for neutral grounding methods is discussed in the paper. Petersen-coil in parallel with high resistance earthed technique has a better performance in safety and power quality than other neutral point grounding techniques. To improve power quality, a novel method for measurement of zero sequence impedance in distribution systems is presented, Petersen-coil inductance is adjusted to compensate the total capacitance, and the resistor which is in parallel with the Petersen-coil is adjusted to control the over-voltage; some other novel techniques for grounding fault feeder protection based on testing the fault resistance or the energy dissipated in the fault point are also presented. The method of Petersen-coil tuning has been developed. Experimental results show that the optimization for neutral grounding methods and the protections proposed can improve the power quality by reducing the over-voltage, the residual current and the grounding fault duration
Index Terms-Power quality, Petersen-coil tuning, Protective relaying, Fault detection
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【期刊论文】Wavelet Analysis Based Protection for High Impedance Ground Fault in Supply Systems
曾祥君, ZengXiangjun and K.K.Li, W.L.Chan
,-0001,():
-1年11月30日
Many High impedance ground faults (HIGF) that happen in low voltage (LV) system often cause customer supply lost, fire and human safety hazard. Traditional ground fault protection is provided by Residual Current Circuit Breaker 0RCCB). The RCCB often causes nuisance tripping and is difficult to detect HIGF. Wavelet analysis based HIGF protection is developed in the paper. Wavelet transform is applied to filter out some frequency bands of harmonics from residual current and line current. The root mean square (RMS) value of harmonics are calculated using their wavelet coefficients directly. HIGF is identified from disturbance by the RMS difference between the residual current and the line current. The digital protection scheme is designed. EMTP simulation results show that the new protection is able to detect HIGF and prevent electric shock with high sensitivity and robustness.
Index Terms-Ground fault Protection, High impedance fault, Low voltage systems, Wavelet analysis.,
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