中国电机工程学报
中國電機工程學報
중국전궤공정학보
Proceedings of the CSEE
2015年
21期
5641-5647
,共7页
陈孝信%钱勇%盛戈%江秀臣
陳孝信%錢勇%盛戈%江秀臣
진효신%전용%성과%강수신
特高频(ultra-high frequency,UHF)%局部放电(partial discharge,PD)%传感器%群时延%时域参数%脉冲响应%有效高度
特高頻(ultra-high frequency,UHF)%跼部放電(partial discharge,PD)%傳感器%群時延%時域參數%脈遲響應%有效高度
특고빈(ultra-high frequency,UHF)%국부방전(partial discharge,PD)%전감기%군시연%시역삼수%맥충향응%유효고도
ultra-high frequency(UHF)%partial discharge%sensor%group delay%time domain parameters%impulse response%effective height
特高频(ultra-high frequency，UHF)传感器的时域输出信号对局部放电宽带检测系统的检测和定位结果具有显著影响，因此评估传感器检测性能时，若能从其时域输出特性出发，将更贴近于宽带检测系统的工程需求。现有的有效高度表征体系不适用于具有非平坦群时延的特高频传感器，在描述传感器时域输出特性时具有局限性。提出了一种基于时域参数的特高频传感器的性能表征方法，通过构造解析脉冲响应函数，从中提取包络峰值、包络宽度和振荡时间三种时域参数，用于描述传感器在局部放电脉冲信号下时域输出波形的峰峰值、上升时间和振荡。设计了有效高度幅频特性与相频特性的测试系统并给出时域参数的测试方法。通过比较两种传感器的时域参数测试结果和实际检测结果对该表征方法进行了检验。研究结果表明：该表征方法能有效地反映UHF传感器的时域输出特性，弥补了现有方法的不足。
特高頻(ultra-high frequency，UHF)傳感器的時域輸齣信號對跼部放電寬帶檢測繫統的檢測和定位結果具有顯著影響，因此評估傳感器檢測性能時，若能從其時域輸齣特性齣髮，將更貼近于寬帶檢測繫統的工程需求。現有的有效高度錶徵體繫不適用于具有非平坦群時延的特高頻傳感器，在描述傳感器時域輸齣特性時具有跼限性。提齣瞭一種基于時域參數的特高頻傳感器的性能錶徵方法，通過構造解析脈遲響應函數，從中提取包絡峰值、包絡寬度和振盪時間三種時域參數，用于描述傳感器在跼部放電脈遲信號下時域輸齣波形的峰峰值、上升時間和振盪。設計瞭有效高度幅頻特性與相頻特性的測試繫統併給齣時域參數的測試方法。通過比較兩種傳感器的時域參數測試結果和實際檢測結果對該錶徵方法進行瞭檢驗。研究結果錶明：該錶徵方法能有效地反映UHF傳感器的時域輸齣特性，瀰補瞭現有方法的不足。
특고빈(ultra-high frequency，UHF)전감기적시역수출신호대국부방전관대검측계통적검측화정위결과구유현저영향，인차평고전감기검측성능시，약능종기시역수출특성출발，장경첩근우관대검측계통적공정수구。현유적유효고도표정체계불괄용우구유비평탄군시연적특고빈전감기，재묘술전감기시역수출특성시구유국한성。제출료일충기우시역삼수적특고빈전감기적성능표정방법，통과구조해석맥충향응함수，종중제취포락봉치、포락관도화진탕시간삼충시역삼수，용우묘술전감기재국부방전맥충신호하시역수출파형적봉봉치、상승시간화진탕。설계료유효고도폭빈특성여상빈특성적측시계통병급출시역삼수적측시방법。통과비교량충전감기적시역삼수측시결과화실제검측결과대해표정방법진행료검험。연구결과표명：해표정방법능유효지반영UHF전감기적시역수출특성，미보료현유방법적불족。
For wide-band partial discharge (PD) detection systems, the time domain output signals of an ultra-high frequency (UHF) sensor significantly affect the results of PD detection and location. Therefore it would be more practical for wide-band PD detection systems if the performance of a UHF sensor is evaluated in terms of its time domain output characteristics. The effective height characterization system currently used has its limitation when the sensor has a non-flat group delay. A performance characterization method of UHF sensors based on time domain parameters is therefore proposed. Three time domain parameters extracted from the analytic impulse response, i.e. the peak value of the envelope, the envelope width and the ringing duration, are applied to describe the peak-peak value, the rise time and the oscillation of the output signal of a UHF sensor detecting PD. A measurement system of the sensor effective height, as well as the method to obtain time domain parameters, is presented. The test results of two sensors is compared with their performance in PD detection to examine the feasibility of the characterization method, which demonstrates that the proposed method can effective characterize the time domain output signals of UHF sensors and thus make up for the shortage of existing characterization methods.
