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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】晶振信号同步GPS信号产生高精度时钟的方法及实现
曾祥君, , 尹项根, 林干, 周延龄
电略系统自动化,2003,49~53,-0001,():
-1年11月30日
GPS接收机输出的秒脉冲信号存在较大的随机误差,但不存在累计误差。晶振时钟信号的随机误差较小,但存在较大的累计误差。文中根据GPS时钟信号与晶振时钟信号精度互补的特点,建立了晶振信号同步GPS信号的一元二次回归数学模型,估计出GPS时钟随机误差的统计方差和晶振的累计误差;对晶振时钟进行实时修正,产生高精度时钟,并预测了修正后的时钟精度。高精度时钟发生装置已成功地应用于电力系统暂态变化过程的异地同步记录。
全球定位系统, 晶振, 时钟, 回归分析
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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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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】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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