CN105223530B - High frequency partial discharge detector test system and test method - Google Patents

High frequency partial discharge detector test system and test method Download PDF

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CN105223530B
CN105223530B CN201510685407.7A CN201510685407A CN105223530B CN 105223530 B CN105223530 B CN 105223530B CN 201510685407 A CN201510685407 A CN 201510685407A CN 105223530 B CN105223530 B CN 105223530B
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frequency
high
signal generator
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partial discharge
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CN105223530A (en
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李欣
叶会生
段肖力
段建家
黄福勇
周卫华
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国家电网公司
国网湖南省电力公司
国网湖南省电力公司电力科学研究院
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Abstract

本发明公开了一种高频局部放电检测仪检定系统及其检定方法,系统包括调频调幅信号发生器、工频电流发生器、标准局放信号发生器、信号调理模块、同轴电缆、匹配阻抗、示波器和中心控制单元;检定方法包括对高频局部放电检测仪进行饱和特性检定等步骤。 The present invention discloses a high frequency partial discharge detector test system and test method, the system comprising a signal generator AM FM, frequency current generator, the standard PD signal generator, signal conditioning modules, coaxial cable, impedance matching , oscilloscope and a central control unit; assay methods include high-frequency partial discharge detector for a saturation characteristic verification step and the like. 本发明调频调幅信号发生器幅值和频率调节方便,能够满足高频局部放电检测仪及其高频电流传感器的性能检定要求,能够有效的、统一的解决高频局部放电检测仪及其高频电流传感器的性能校验问题,方便实现高频局部放电检测仪的定期检验,确保高频局部放电检测仪的良好性能,能够有效地反映电气设备的运行状态,具有检测结果准确可靠、易于实现的优点。 FM AM signal generator of the present invention is easy to adjust the amplitude and frequency, able to meet the high-frequency partial discharge detector and test performance requirements of high-frequency current sensor, it can be effective, uniform solution and a high-frequency high-frequency partial discharge detector a current sensor performance verification problems, facilitate the realization of a high-frequency periodic inspection of a partial discharge detector to ensure good performance of the high frequency partial discharge detector, capable of effectively representing status of electrical equipment, having a detection result is accurate and reliable, easy to implement advantage.

Description

高频局部放电检测仪检定系统及其检定方法 High frequency partial discharge detector test system and test method

技术领域 FIELD

[0001] 本发明涉及电力工程技术领域,具体涉及一种高频局部放电检测仪检定系统及其检定方法,用于对高频局部放电检测仪(HFCT)进行性能检定。 [0001] The present invention relates to the field of power engineering, particularly to the high-frequency detector test system and test method for partial discharge, high-frequency test for the performance of a partial discharge detector (HFCT).

背景技术 Background technique

[0002] 随着我国经济的快速发展,各行业对电网供电的可靠性和稳定性的要求越来越高,电力设备的停电试验次数也将随之减少,带电检测将逐步取代停电试验,成为获取电力设备状态信息的主要手段之一。 [0002] With the rapid development of China's economy, the industry requirements for reliability and stability of the power grid of the increasingly high number of power outages testing of electrical equipment also will be reduced, charged detection will gradually replace the blackout test to become one of the main means of access to power equipment status information. 当电气设备发生局部放电时,会产生频率3MHz-30MHz的高频脉冲电流,并沿着电气设备的金属部件传播,并通过接地线入地,利用高频电流传感器(HFCT)可检测到此信号,该传感器可用于测量频率介于十几kHz至30MHz的微电流信号,并将电流信号转化为电压信号,用于反映局部放电的程度。 When the partial discharge electrical device occurs, will produce a frequency pulse current of 3MHz-30MHz, and propagate along the metal parts of electrical equipment, and into the ground through the ground line, high-frequency current sensor (the HFCT) may detect this signal the sensor can be used to measure the frequency of the micro-current signal of between ten kHz to 30MHz, and the current signal into a voltage signal, used to reflect the degree of partial discharge. 高频局部放电带电检测作为检测电气设备健康状况的重要手段,在变压器、电缆和避雷器等电气设备故障检测中发挥了重要作用,随着高频局部放电检测的应用逐渐增多,高频局部放电检测仪(HFCT)的性能也引起人们的重视。 Partial discharge detection frequency as an important means for detecting the charged state of health of electrical equipment, the electrical equipment fault detection play transformers, cables, and the like arrester important role, with the application of high-frequency partial discharge detection gradually increased, the high frequency partial discharge detection performance analyzer (HFCT) also attracted attention. 但目如尚缺之有关尚频局放传感器性能检定有效、统一的方法,导致尚频局放带电检测仪在使用过程中都未开展定期检测,仪器性能和测试精度均无法得到有效保障,造成现场应用不同仪器测试的结果差别较大,可信度不高,测试结果无法有效、真实的反映变压器、电缆和避雷器等电气设备的运行状态。 But the head is still missing as of yet about the frequency of partial discharge sensor performance verification effective, unified approach, resulting in still-frequency detector PD charged neither carried out in the course of regular testing, instrument performance and measurement accuracy are not effectively protected, resulting in the results of field tests using different instruments vary greatly, credibility is not high, the test results can not effectively run a true reflection of the state of transformers, cables and surge arresters and other electrical equipment. 为解决上述问题,有必要研究一套有效的、统一的高频局部放电检测传感器检定系统及方法,以解决高频局部放电检测仪(HFCT) 性能无法定期检验问题,确保仪器检测的良好性能,从而保证高频局部放电检测仪(HFCT) 的检测结果可准确、有效地反映电气设备的运行状态。 To solve the above problems, it is necessary to study an effective, uniform method for the sensor calibration system and a high-frequency partial discharge detection to address the high frequency partial discharge detector (the HFCT) performance problem can not be tested regularly to ensure good performance of the detection instrument, thus ensuring a high frequency partial discharge detector (the HFCT) the test results can be accurately, efficiently representing status of electrical equipment.

发明内容 SUMMARY

[0003] 本发明要解决的技术问题是:针对现有技术的上述问题,提供一种能够满足高频局部放电检测仪及其高频电流传感器的性能检定要求,能够有效的、统一的解决高频局部放电检测仪及其高频电流传感器的性能校验问题,方便实现高频局部放电检测仪的定期检验,确保高频局部放电检测仪的良好性能,能够有效地反映电气设备的运行状态,检测结果准确可靠、易于实现的高频局部放电检测仪检定系统及其检定方法。 [0003] The present invention is to solve the technical problem: For the above-described problems of the prior art, to provide a partial discharge detector to meet the high-frequency and high-frequency properties of the current sensor verification requirements, it can be effective, highly uniform solution frequency partial discharge detector and performance verification issues high-frequency current sensor, realized facilitate regular inspection of the high frequency partial discharge detector, to ensure good performance of the high frequency partial discharge detector, capable of effectively representing status of electrical equipment, test results are accurate and reliable, high-frequency partial discharge detector test system and test method is easy to achieve.

[0004] 为了解决上述技术问题,本发明采用的技术方案为: [0004] In order to solve the above problems, the present invention adopts the technical solution as follows:

[0005] 本发明提供一种高频局部放电检测仪检定系统,包括调频调幅信号发生器、工频电流发生器、标准局放信号发生器、信号调理模块、同轴电缆、匹配阻抗、示波器和中心控制单元,所述调频调幅信号发生器的输出端、标准局放信号发生器的输出端分别与信号调理模块的输入端相连,所述信号调理模块的输出端依次通过同轴电缆、匹配阻抗接地,被检定高频局部放电检测仪的高频电流传感器同时套设于匹配阻抗的接地电缆、工频电流发生器的输出电缆上,所述工频电流发生器的电流输出端通过输出电缆和电流回流输入端相连, 所述示波器的一路检测端子与匹配阻抗的前端相连、另一路检测端子与高频电流传感器的输出端相连,所述示波器的输出端与中心控制单元相连,所述中心控制单元分别与调频调幅信号发生器、工频电流发生器、标准局放 [0005] The present invention provides a high frequency partial discharge detector test system comprising a signal generator AM FM, frequency current generator, the standard PD signal generator, signal conditioning modules, coaxial cable, impedance matching, and oscilloscopes the output of the central control unit, the output of FM-AM signal generator, the standard PD signal generator are connected to an input signal conditioning module, the output of the signal conditioning module successively through the coaxial cable, matching impedance ground, high frequency current is frequency PD sensor calibration detector while matching sleeved on the ground cable impedance on the output cable frequency current generator, the working frequency of the current generator current output terminal through the output cable and reflux current input terminal, and the detection terminal is connected to the front end all the way to match the impedance of the oscilloscope, the output terminal is connected to the other terminal of the high-frequency current passage detecting sensor, the output of the oscilloscope is connected to the central control unit, said central control AM and FM were put unit signal generator frequency current generator, Bureau of standards 号发生器的控制端相连。 Connected to a control terminal of the generator.

[0006] 优选地,所述信号调理模块包括通道切换电路、阻抗变换电路、信号放大电路、去噪滤波电路和增益调节电路,所述调频调幅信号发生器的输出端、标准局放信号发生器的输出端分别与通道切换电路的输入端相连,所述通道切换电路的输出端依次通过阻抗变换电路、信号放大电路、去噪滤波电路和增益调节电路的输入端相连,所述增益调节电路的输出端依次通过同轴电缆、匹配阻抗接地。 [0006] Preferably, the signal conditioning module includes a channel switching circuit, the impedance conversion circuit, a signal amplifying circuit, a noise removal filter circuit and a gain adjustment circuit, the output of FM-AM signal generator, the standard signal generator PD the output of each input of the circuit is connected to the channel switching, the output of the switching circuit of the impedance conversion circuit passes through the channel, a signal amplifying circuit, a noise removal filter circuit connected to the input and the gain adjustment circuit, the gain adjustment circuit sequentially output terminal through a coaxial cable, matching impedance to ground.

[0007] 优选地,所述中心控制单元还连接有显示单元和人机接口。 [0007] Preferably, the central control unit is further connected to a display unit and a man-machine interface.

[0008] 本发明还提供一种高频局部放电检测仪检定系统的检定方法,包括对高频电流传感器进行饱和特性检定的步骤,详细步骤包括: [0008] The present invention further provides a method for high frequency partial discharge test detector test system, comprising the step of high-frequency current sensor saturation characteristic test, the detailed steps comprising:

[0009] 1.1)连接布置待检定的高频电流传感器,并将高频电流传感器的输出端和高频局部放电检测仪相连; [0009] 1.1) arranged to be connected to a high-frequency current sensor verification, and the output end of a high-frequency current sensor and the partial discharge detector is connected;

[0010] 1.2)保持标准局放信号发生器关闭,打开调频调幅信号发生器,调节调频调幅信号发生器输出频率为10MHz、峰值为IV的正弦信号并维持不变; [0010] 1.2) remains the standard PD signal generator is turned off, the signal generator opens FM-AM, FM-AM adjustment signal generator output frequency is 10MHz, IV peak sinusoidal signals and unchanged;

[0011] 1.3)打开工频电流发生器并从零开始逐渐增大输出电流,记录工频电流发生器的电流值和高频局部放电检测仪检测的高频电流传感器的输出电压幅值,当高频电流传感器的输出电压幅值降低到原幅值的1/2时,记录此时工频电流发生器的电流值作为高频电流传感器的实测工频饱和电流I,并根据式(1)计算高频电流传感器的饱和电流值误差; [0011] 1.3) to open and zero-frequency current generator output current is gradually increased, a high-frequency recording current sensor output voltage amplitude and the current value of the high frequency partial discharge detector detecting power frequency current generator, when 1/2 of the output voltage amplitude high frequency current sensor is reduced to the original amplitude, frequency recording current value at this time as a current generator working a high-frequency current sensor measured frequency saturation current I, and according to formula (1) error frequency calculating saturation current of the current sensor;

Figure CN105223530BD00061

[0013] 式(1)中,ΛΙ为高频电流传感器的饱和电流值误差,I为高频电流传感器的实测工频饱和电流,I g为高频电流传感器的标称工频饱和电流值。 [0013] Formula (1), ΛΙ saturation current of the high-frequency current sensor error, I is the measured saturation current frequency of the high frequency working current sensor, I g is the nominal frequency of the saturation current value of a high frequency working current sensor.

[0014] 优选地,该方法还包括对高频电流传感器进行幅频特性检定的步骤,详细步骤包括: [0014] Preferably, the method further comprises the step of high-frequency current sensor verification amplitude-frequency characteristic, detailed steps comprising:

[0015] 2.1)连接布置待检定的高频电流传感器; [0015] 2.1) arranged to be connected to a high-frequency current sensor verification;

[0016] 2.2)保持工频电流发生器及标准局放信号发生器关闭,打开调频调幅信号发生器,调节调频调幅信号发生器输出信号峰值为IV的正弦信号并维持不变; [0016] 2.2) remains the standard frequency current generator and signal generator PD closed, open AM FM signal generator, an output adjustment signal peak amplitude modulation signal generator is a frequency modulated sinusoidal signal remains unchanged and IV;

[0017] 2.3)在100kHz~50MHz范围内逐步调节调频调幅信号发生器的输出信号频率,且在100kHz~1MHz频率范围内检测步长为100kHz,lMHz~50MHz频率范围内检测步长为1MHz; 在调节调频调幅信号发生器输出信号频率的过程中,记录调频调幅信号发生器输出信号的频率和示波器输出的高频电流传感器的输出电压幅值; Output signal frequency [0017] 2.3) stepwise adjustment AM FM signal generator in the range of 100kHz ~ 50MHz, and in a frequency range of 100kHz ~ 1MHz the detection step is 100kHz, lMHz ~ within the frequency range of 50MHz to 1MHz detecting step; in FM-AM process control signal generator output signal frequency, the high frequency current recording sensor output voltage amplitude and frequency oscilloscope output AM FM signal generator output signal;

[0018] 2.4)通过中心控制单元根据调频调幅信号发生器输出信号的频率和示波器输出的高频电流传感器的输出电压幅值绘制出高频电流传感器在100kHz~50MHz的幅频特性曲线。 [0018] 2.4) plotted high-frequency current sensor web 100kHz ~ 50MHz by the frequency characteristic curve of a central control unit based on the output voltage amplitude and frequency of the high frequency current sensor output oscilloscope AM FM signal generator output signal.

[0019] 优选地,该方法还包括对高频电流传感器进行传输阻抗检定的步骤,详细步骤包括: [0019] Preferably, the method further comprising the step of transmitting the high-frequency impedance test current sensor, detailed steps comprising:

[0020] 3.1)连接布置待检定的高频电流传感器; [0020] 3.1) arranged to be connected to a high-frequency current sensor verification;

[0021] 3.2)保持工频电流发生器及标准局放信号发生器关闭,打开调频调幅信号发生器,调节调频调幅信号发生器输出信号峰值为IV、信号频率为10MHz的正弦信号并维持不变; [0021] 3.2) remains the standard frequency current generator and signal generator PD closed, open AM FM signal generator, the signal generator adjusting an output signal amplitude of IV peak frequency modulation, the signal frequency is 10MHz sinusoidal signal remains unchanged and ;

[0022] 3.3)通过示波器分别记录匹配阻抗的前端电压山和高频电流传感器的输出电压U2; [0022] 3.3) of the front end of the impedance matching records voltage and the output voltage U2 mountain high frequency current through the sensor, respectively oscilloscope;

[0023] 3.4)中心控制单元根据式⑵计算高频电流传感器的传输阻抗; [0023] 3.4) the central control unit calculates the impedance of the transmission high-frequency current sensor according to formula ⑵;

Figure CN105223530BD00071

[0025] 式⑵中,Z为高频电流传感器的传输阻抗,山为匹配阻抗的前端电压,1]2为高频电流传感器的输出电压。 [0025] ⑵ formula, Z is the impedance of the transmission high-frequency current sensor, a voltage distal mountain impedance matching, 1] 2 sensor output voltage of the high frequency current.

[0026] 优选地,该方法还包括对高频电流传感器进行检测频带检定的步骤,详细步骤包括: [0026] Preferably, the method further comprises the step of detecting a high-frequency band of the current sensor verification, detailed steps comprising:

[0027] 4.1)连接布置待检定的高频电流传感器; [0027] 4.1) arranged to be connected to a high-frequency current sensor verification;

[0028] 4.2)保持工频电流发生器及标准局放信号发生器关闭,打开调频调幅信号发生器,调节调频调幅信号发生器输出信号峰值为IV的正弦信号并维持不变; [0028] 4.2) remains the standard frequency current generator and signal generator PD closed, open AM FM signal generator, an output adjustment signal peak amplitude modulation signal generator is a frequency modulated sinusoidal signal remains unchanged and IV;

[0029] 4.3)在100kHz~50MHz范围内逐步调节调频调幅信号发生器的输出信号频率,且在100kHz~1MHz频率范围内检测步长为100kHz,lMHz~50MHz频率范围内检测步长为1MHz; 在调节调频调幅信号发生器输出信号频率的过程中,记录调频调幅信号发生器输出信号的频率和示波器采集的高频电流传感器的输出电压幅值; Output signal frequency [0029] 4.3) stepwise adjustment AM FM signal generator in the range of 100kHz ~ 50MHz, and in a frequency range of 100kHz ~ 1MHz the detection step is 100kHz, lMHz ~ within the frequency range of 50MHz to 1MHz detecting step; in FM-AM process control signal generator output signal frequency, the high frequency current recording sensor output voltage amplitude of the frequency signal generator and an oscilloscope output signal of FM-AM collected;

[0030] 4.4)根据调频调幅信号发生器输出信号的频率和高频电流传感器的输出电压幅值绘制出检测频带曲线,找出高频电流传感器的输出电压幅值从最大值下降到最大值的0.5倍时调频调幅信号发生器输出信号的上下截止频率,从而得到高频电流传感器检测频带的上下截止频率。 [0030] 4.4) drawn from the output voltage magnitude of the frequency and amplitude modulated high-frequency current sensor FM signal generator output signal frequency band of the detection curve to find the amplitude of the high frequency current sensor output voltage drops from the maximum to the maximum value 0.5 times the upper and lower AM FM signal generator output signal cut-off frequency, whereby the upper and lower cut-off frequency of the high band current sensors.

[0031] 优选地,该方法还包括对高频局部放电检测仪进行线性度检定的步骤,详细步骤包括: [0031] Preferably, the method further comprising the step of partial discharge detector for a high-frequency linearity verification, the detailed steps comprising:

[0032] 5.1)连接布置待检定的高频局部放电检测仪及其高频电流传感器; [0032] 5.1) arranged to be connected to a high frequency partial discharge test and the high-frequency current detector sensor;

[0033] 5.2)保持工频电流发生器及标准局放信号发生器关闭;打开调频调幅信号发生器,调节调频调幅信号发生器输出3MHz~30MHz之间的某一指定频率的正弦信号,且调节调频调幅信号发生器输出信号的幅值使高频局部放电检测仪达到满量程,记录此时调频调幅信号发生器输出的峰值电压U4P高频局部放电检测仪的满量程幅值A m; [0033] 5.2) remains the standard frequency current generator and signal generator PD closed; open AM FM signal generator, the signal generator output amplitude adjusted sinusoidal frequency modulation signal having a specified frequency between 3MHz ~ 30MHz, and the regulating AM signal amplitude FM signal generator output so that the high-frequency partial discharge detector reaches full scale, this time recording FM AM signal generator peak voltage of the high frequency partial discharge detector U4P full scale amplitude a m;

[0034] 5.3)依次降低调频调幅信号发生器输出信号的幅值至AUm,其中参数λ分别为小于1且大于〇的一组递减数值,记录不同参数λ下高频局部放电检测仪输出的幅值Αα; [0034] 5.3) successively reducing the magnitude of the output signal of FM-AM signal generator to Aum, wherein the parameter λ is less than 1 and greater than, respectively, a set of square values ​​decreasing, different parameters λ recording at a high frequency partial discharge detector output web value Αα;

[0035] 5.4)中心控制单元根据公式计算高频局部放电检测仪在不同参数λ取值测量点的线性度误差: [0035] 5.4) the central control unit calculates the high frequency linearity error partial discharge detector at different values ​​of the parameter λ measurement points according to the formula:

Figure CN105223530BD00072

[0037] 式⑶中,£为高频局部放电检测仪在某一个参数λ取值测量点的线性度误差,Αλ为该参数λ取值下高频局部放电检测仪输出的幅值,A m为高频局部放电检测仪的满量程幅值。 [0037] In the formula ⑶, £ high-frequency partial discharge detector linearity error in a measured value of a parameter λ point, Αλ amplitude values ​​for the parameters λ high frequency partial discharge detector output, A m full scale amplitude of the high frequency partial discharge detector.

[0038] 优选地,该方法包括对高频局部放电检测仪进行灵敏度检定的步骤,详细步骤包括: [0038] Preferably, the method comprises the step of high-frequency partial discharge detector sensitivity test, the detailed steps comprising:

[0039] 6.1)连接布置待检定的高频局部放电检测仪及其高频电流传感器; [0039] 6.1) arranged to be connected to a high frequency partial discharge test and the high-frequency current detector sensor;

[0040] 6.2)保持调频调幅信号发生器及工频电流发生器关闭;打开标准局放信号发生器,控制标准局放信号发生器的输出信号幅值为0,通过高频局部放电检测仪记录此时高频电流传感器的初始输出电压幅值A1; [0040] 6.2) and kept AM FM signal generator frequency current generator is off; open standard PD signal generator, the standard PD control signal generator output signal amplitude is 0, by high-frequency partial discharge detector records At this time, the initial output voltage amplitude A1 of high frequency current sensor;

[0041] 6.3)从零开始逐步增加标准局放信号发生器的输出信号幅值,并通过高频局部放电检测仪记录此时高频电流传感器的当前输出电压幅值A2;当满足当前输出电压幅值A2超过初始输出电压幅值A1的两倍时,记录此时标准局放信号发生器的输出信号幅值Q,该输出信号幅值Q即为高频局部放电检测仪的灵敏度。 [0041] 6.3) The zero gradually increasing output signal amplitude Bureau of Standards discharge signal generator, and at this time the current through the high frequency output voltage amplitude A2 recorded high frequency partial discharge detector current sensor; satisfied when the present output voltage when the amplitude A2 than twice the initial output voltage amplitude of A1, recording the amplitude of the output signal Q standard case partial discharge signal generator, the sensitivity of the output signal Q is the amplitude of the high frequency partial discharge detector.

[0042] 本发明高频局部放电检测仪检定系统具有下述优点:本发明的高频局部放电检测仪检定系统包括调频调幅信号发生器、工频电流发生器、标准局放信号发生器、信号调理模块、同轴电缆、匹配阻抗、示波器和中心控制单元,能够实现高频局部放电检测仪高频电流传感器的饱和特性、幅频特性、传输阻抗、检测频带及高频局部放电检测仪的线性度、灵敏度等性能的检定,调频调幅信号发生器幅值和频率调节方便,能够满足高频局部放电检测仪及其高频电流传感器的检定要求,能够有效的、统一的解决高频局部放电检测仪及其高频电流传感器的性能校验问题,方便实现高频局部放电检测仪的定期检验,确保高频局部放电检测仪的良好性能,能够有效地反映电气设备的运行状态,具有检测结果准确可靠、易于实现的优点。 [0042] The high-frequency partial discharge detector test system of the present invention has the following advantages: high frequency partial discharge detector test system of the present invention comprises a frequency modulation signal generator amplitude modulation, frequency current generator, the standard PD signal generator, signal conditioning modules, coaxial cable, matching impedance, oscilloscope and central control unit, saturation characteristics can be realized a high frequency partial discharge detector high-frequency current sensor, a linear amplitude-frequency characteristic, transfer impedance, frequency band and the high frequency partial discharge detection detector properties, sensitivity and other assays, FM and AM frequency adjustment signal generator amplitude easy to meet high-frequency partial discharge detector and verification requirements of a high-frequency current sensor, can be effective, uniform solution frequency partial discharge detection instrument calibration and performance issues of the high-frequency current sensor, realized facilitate regular inspection of the high frequency partial discharge detector, to ensure good performance of the high frequency partial discharge detector, capable of effectively representing status of electrical equipment, with accurate detection result reliable, easy to implement advantage.

[0043] 本发明高频局部放电检测仪检定系统的检定方法为本发明高频局部放电检测仪检定系统用于包括饱和特性在内的性能的检定,同样也能够有效的、统一的解决高频局部放电检测仪及其高频电流传感器包括饱和特性在内的性能校验问题,方便实现高频局部放电检测仪的定期检验,确保高频局部放电检测仪的良好性能,能够有效地反映电气设备的运行状态,具有检测结果准确可靠、易于实现的优点。 [0043] The assay method of the high frequency partial discharge detector test system according to the present invention, a high frequency partial discharge detector test system of the invention for assay performance characteristics, including including saturation, can be equally effective, uniform solution frequency performance verification issues partial discharge detector comprises a current sensor and a high-frequency characteristics, including saturated, to facilitate regular inspection to achieve high frequency partial discharge detector, to ensure good performance of the high frequency partial discharge detector, the electrical equipment can be efficiently reflected operating state, with accurate and reliable detection result, the advantages achieved easily.

附图说明 BRIEF DESCRIPTION

[0044] 图1为本发明实施例系统的框架结构示意图。 [0044] FIG. 1 is a schematic example of a system embodiment of the frame structure of the present invention.

[0045]图2为本发明实施例系统绘制出的检测频带曲线。 [0045] FIG band detection curve drawn embodiment of a system embodiment of the invention.

具体实施方式 Detailed ways

[0046]如图1所示,本实施例的高频局部放电检测仪检定系统包括调频调幅信号发生器1、工频电流发生器2、标准局放信号发生器3、信号调理模块4、同轴电缆5、匹配阻抗6、示波器7和中心控制单元8,调频调幅信号发生器1的输出端、标准局放信号发生器3的输出端分别与信号调理模块4的输入端相连,信号调理模块4的输出端依次通过同轴电缆5、匹配阻抗6接地,被检定高频局部放电检测仪11的高频电流传感器110同时套设于匹配阻抗6的接地电缆、工频电流发生器2的输出电缆上,工频电流发生器2的电流输出端通过输出电缆和电流回流输入端相连,示波器7的一路检测端子与匹配阻抗6的前端相连、另一路检测端子与高频电流传感器110的输出端相连,示波器7的输出端与中心控制单元8相连,中心控制单元8分别与调频调幅信号发生器1、工频电流发生器2、标准局放信 [0046] 1, the high frequency partial discharge detector test system of the present embodiment includes an FM signal generator amplitude modulation, frequency current generator 2, the standard PD signal generator 3, the signal conditioning module 4, with 5 coaxial cable, matching impedance 6, 7 and oscilloscope central control unit 8, the output of AM FM signal generator 1, the standard PD signal generator output terminal 3 is connected to an input signal conditioning module 4, respectively, the signal conditioning module output 4 sequentially through the coaxial cable 5, 6 is grounded impedance matching, the high frequency partial discharge detector test high-frequency current sensor 110 provided in the sleeve 11 while matching impedance grounding cable 6, the output frequency of the current generator 2 cable, power frequency current generator is connected to the current output terminal 2 and the output current return cable input terminal, all the way to the detection terminal 7 and the matching impedance connected to the front end of the oscilloscope 6, the output terminal of the other terminal of the high-frequency current passage detection sensor 110 connected to the output terminal is connected to the oscilloscope and the central control unit 7, 8, respectively, the central control unit 8 AM FM signal generator 1, power frequency current generator 2, a standard letter PD 号发生器3的控制端相连。 Signal generator coupled to the control terminal 3. 基于上述结构,本实施例的高频局部放电检测仪检定系统能够实现高频电流传感器110的饱和特性、幅频特性、传输阻抗、检测频带及高频局部放电检测仪11的线性度、灵敏度中任意一种或多种及其他性能的检定,能够有效的、统一的解决尚频局部放电检测仪11及其尚频电流传感器110的性能校验问题,方便实现高频局部放电检测仪11的定期检验,确保高频局部放电检测仪11的良好性能,能够有效地反映电气设备的运行状态,具有检测结果准确可靠、易于实现的优点。 Based on the above configuration, the high frequency partial discharge detector test system of the present embodiment can achieve saturation characteristics of the high-frequency current sensor 110, the amplitude-frequency characteristic, transfer impedance, and high frequency band detected partial discharge detector 11, the linearity of the sensitivity of and any one or more of the other performance verification, can effectively, yet uniform solution frequency partial discharge detector 11 and the frequency performance verification issues still current sensor 110, facilitate the realization of a high-frequency periodic partial discharge detector 11 inspection, to ensure good performance high frequency partial discharge detector 11, it is possible to effectively reflect the operation state of the electrical device, with the detection result is accurate and reliable, easy advantages achieved.

[0047] 本实施例中,调频调幅信号发生器1用于检定高频电流传感器110的幅频特性、传输阻抗、检测频带、线性度及高频局部放电检测仪11的灵敏度和稳定性等,可提供0~50MHz 幅值可调的高频信号;工频电流发生器2主要用于检定高频局部放电检测仪11的饱和特性, 可提供〇~50A的工频50Hz电流;标准局放信号发生器3可提供0~500pC的局放信号,具体采用杭州西湖电子有限公司HD型标准局放脉冲源。 [0047] In this embodiment, a frequency modulation amplitude modulation signal generator for high-frequency current sensor 110 assay web-frequency characteristic, transfer impedance, detection band, linearity and high frequency partial discharge detector sensitivity and stability, 11, providing a high frequency signal amplitude may be adjustable 0 ~ 50MHz; frequency current generator 2 is mainly used for high-frequency characteristics of partial saturation assays discharge detector 11, which provides a square ~ 50A 50Hz frequency current; standard signal PD 3 generator may be provided Board 0 ~ 500pC discharge signal, the specific use of West Lake, standard Electronics Co. HD PD pulse source. 本实施例中,信号调理模块4包括通道切换电路、阻抗变换电路、信号放大电路、去噪滤波电路和增益调节电路,调频调幅信号发生器1 的输出端、标准局放信号发生器3的输出端分别与通道切换电路的输入端相连,通道切换电路的输出端依次通过阻抗变换电路、信号放大电路、去噪滤波电路和增益调节电路的输入端相连,增益调节电路的输出端依次通过同轴电缆5、匹配阻抗6接地,由于通道切换电路、 阻抗变换电路、信号放大电路、去噪滤波电路和增益调节电路均为常见的现有电路,故其具体电路结构在本实施例中不再展开说明。 Output 3 of the present embodiment, the signal conditioning module includes a channel switching circuit 4, impedance conversion circuit, a signal amplifying circuit, a noise removal filter circuit and the gain adjustment circuit, the output of FM-AM signal generator 1, the standard PD signal generator are respectively connected to the input terminal of the switching circuit of the channel, the channel output terminal of the switching circuit passes through the impedance conversion circuit, a signal amplifying circuit, and denoising filter circuit gain adjustment circuit input terminal, an output terminal of the gain adjustment circuit successively through the coaxial cable 5, 6 is grounded impedance matching, since the channel switching circuit, the impedance conversion circuit, a signal amplifying circuit, the common circuit both conventional denoising filter circuit and a circuit gain adjustment, so the specific circuit configuration will not expand in the present embodiment, instructions. 同轴电缆5用于传输信号;匹配阻抗6用于匹配同轴电缆阻抗,降低波折反射,一般用50 Ω电阻;示波器7用于显示测试的信号;中心控制单元8用于控制检定系统的各项功能。 Each central control unit 8 for controlling a verification system; 5 coaxial cable for transmitting signals; 6 matching impedance for matching the impedance of the coaxial cable to reduce reflection of twists and turns, usually with 50 Ω resistor; 7 oscilloscope display signal for testing entry function.

[0048] 图1所示,本实施例的中心控制单元8还连接有显示单元9和人机接口10,显示单元9用于显示信号幅值和频率,人机接口10用于操作仪器。 [0048] As shown in FIG. 1, the central control unit of the present embodiment is also connected to a display unit 8 and 9 human interface 10, a display unit 9 for displaying the signal amplitude and frequency, the man-machine interface 10 for operating the instrument. 此外,中心控制单元8还可以通过远程网络通信、本地存储接口等方式,来实现对高频局部放电检测仪检定的远程控制及数据交换、本地自动控制及数据存储等,其基本检定原理与本实施例相同,故在此不再赘述。 Further, the central control unit 8 can also communicate through the remote network, a local storage interfaces, etc., to remote control and data exchange to the high frequency partial discharge detector test, the local automatic control and data storage, etc. The basic principle of the present assay the same embodiment, and therefore not repeated here.

[0049] 本实施例高频局部放电检测仪检定系统能够实现高频电流传感器110的饱和特性、幅频特性、传输阻抗、检测频带及高频局部放电检测仪11的线性度、灵敏度等性能的检定。 [0049] The saturation characteristics of the high-frequency current sensor 110 can be realized according to the high frequency partial discharge detector test system of the present embodiment, the amplitude-frequency characteristic, transfer impedance, frequency band and the high frequency partial discharge detection detector linearity of the instrument 11, the sensitivity performance test. 本实施例高频局部放电检测仪检定系统的检定方法包括对高频电流传感器110进行饱和特性检定的步骤,详细步骤包括: Assay method of Example frequency PD detector test system of the present embodiment includes a sensor 110 for high-frequency current saturation characteristic verification step, detailed steps comprising:

[0050] 1.1)连接布置待检定的高频电流传感器110,并将高频电流传感器110的输出端和高频局部放电检测仪11相连; [0050] 1.1) arranged to be connected to a high-frequency test current sensor 110, a current sensor and a high-frequency and high-frequency output terminal 110 of a partial discharge detector 11 is connected;

[0051] 1.2)保持标准局放信号发生器3关闭,打开调频调幅信号发生器1,调节调频调幅信号发生器1输出频率为10MHz、峰值为IV的正弦信号并维持不变; [0051] 1.2) remains the standard PD signal generator 3 is closed, open the FM signal generator 1 AM, FM-AM adjustment signal generator output frequency of 10MHz, peak sinusoidal signal remains unchanged and IV;

[0052] 1.3)打开工频电流发生器2并从零开始逐渐增大输出电流,记录工频电流发生器2 的电流值和高频局部放电检测仪11检测的高频电流传感器110的输出电压幅值,当高频电流传感器110的输出电压幅值降低到原幅值的1/2时,记录此时工频电流发生器2的电流值作为高频电流传感器110的实测工频饱和电流I,并根据式⑴计算高频电流传感器110的饱和电流值误差; [0052] 1.3) Open-frequency current generator 2 and the output current gradually increases from scratch, a high-frequency recording current sensor output voltage frequency and high-frequency current generator current detector 11 detects the partial discharge of 2 110 amplitude, high frequency current when the output voltage amplitude of the sensor 110 is reduced to 1/2 of the original amplitude, the recording current value at this time-frequency high-frequency generator 2 the current sensor 110 Found station frequency saturation current I and the saturation current is calculated according to the formula ⑴ frequency error of the current sensor 110;

Figure CN105223530BD00091

[0054] 式(1)中,ΛΙ为高频电流传感器110的饱和电流值误差,I为高频电流传感器110的实测工频饱和电流,Ig为高频电流传感器110的标称工频饱和电流值。 [0054] Formula (1), ΛΙ saturation current frequency error of the current sensor 110, I-frequency current is a high frequency current saturation sensor 110 Found work, Ig high frequency current sensor 110 nominal working frequency saturation current value. 一般而言,高频电流传感器110的饱和电流值误差ΛΙ不应大于±10%。 In general, high frequency current saturation current sensor 110 is ΛΙ error should not exceed ± 10%.

[0055] 本实施例高频局部放电检测仪检定系统的检定方法还包括对高频电流传感器110 进行幅频特性检定的步骤,详细步骤包括: [0055] The assay method of the present embodiment, the high frequency partial discharge detector test system further comprises a high-frequency current sensor 110 amplitude-frequency characteristic verification step, detailed steps comprising:

[0056] 2.1)连接布置待检定的高频电流传感器110; [0056] 2.1) arranged to be connected to a high-frequency test current sensor 110;

[0057] 2.2)保持工频电流发生器2及标准局放信号发生器3关闭,打开调频调幅信号发生器1,调节调频调幅信号发生器1输出信号峰值为IV的正弦信号并维持不变; [0057] 2.2) maintaining frequency current generator 2 and a standard PD signal generator 3 is closed, open AM FM signal generator 1, a regulating output signal peak amplitude modulation signal generator is a frequency modulated sinusoidal signal remains unchanged and IV;

[0058] 2.3)在100kHz~50MHz范围内逐步调节调频调幅信号发生器1的输出信号频率,且在100kHz~1MHz频率范围内检测步长为100kHz,lMHz~50MHz频率范围内检测步长为1MHz; 在调节调频调幅信号发生器1输出信号频率的过程中,记录调频调幅信号发生器1输出信号的频率和示波器7输出的高频电流传感器110的输出电压幅值; [0058] 2.3) adjusted stepwise within the range of the output signal frequency of 100kHz ~ 50MHz AM FM signal generator 1, and within the detection frequency range of 100kHz ~ 1MHz steps of 100kHz, the lMHz ~ 50MHz frequency range of 1MHz detecting step; FM-AM in regulating the signal generator output signal frequency, the output of high-frequency current recording sensor output signal frequency and the FM-AM oscilloscope output voltage amplitude signal generator 110, 7;

[0059] 2.4)通过中心控制单元8根据调频调幅信号发生器1输出信号的频率和示波器7输出的高频电流传感器11 〇的输出电压幅值绘制出高频电流传感器11 〇在100kHz~50MHz的幅频特性曲线。 [0059] 2.4) 8 plotted in the high-frequency current sensor 11 billion 100kHz ~ 50MHz high frequency current from the output voltage amplitude of the sensor output signal frequency and the FM-AM oscilloscope output signal generator 711 by the square of a central control unit amplitude-frequency characteristic curve. 一般而言,高频电流传感器110的幅频特性与产品说明书的误差要求不超过土10%〇 In general, high frequency current sensor 110 and the amplitude-frequency characteristics of the product specification requirements error does not exceed 10% of soil billion

[0060] 本实施例高频局部放电检测仪检定系统的检定方法还包括对高频电流传感器110 进行传输阻抗检定的步骤,详细步骤包括: [0060] The assay method of Example frequency partial discharge detector test system of the present embodiment further comprises the step of transmitting a high-frequency current impedance test sensor 110, the detailed steps comprising:

[0061] 3.1)连接布置待检定的高频电流传感器110; [0061] 3.1) arranged to be connected to a high-frequency test current sensor 110;

[0062] 3.2)保持工频电流发生器2及标准局放信号发生器3关闭,打开调频调幅信号发生器1,调节调频调幅信号发生器1输出信号峰值为IV、信号频率为10MHz的正弦信号并维持不变; [0062] 3.2) maintaining frequency current generator 2 and a standard PD signal generator 3 is closed, open AM FM signal generator 1, a regulating output signal peak IV of AM FM signal generator, a sinusoidal signal the signal frequency of 10MHz and remain unchanged;

[0063] 3.3)通过示波器7分别记录匹配阻抗6的前端电压山和高频电流传感器110的输出电压U2; [0063] 3.3) recording the output voltage of the voltage U2 distal Hill impedance matching and high-frequency current sensor 6 by the oscilloscope 110, respectively 7;

[0064] 3.4)中心控制单元8根据式⑵计算高频电流传感器110的传输阻抗; [0064] 3.4) The central control unit 8 calculates a high-frequency current sensor 110 according to the formula ⑵ transfer impedance;

Figure CN105223530BD00101

[0066] 式(2)中,Z为高频电流传感器110的传输阻抗,山为匹配阻抗6的前端电压,U2为高频电流传感器110的输出电压。 [0066] Formula (2), Z is the impedance of the transmission high-frequency current sensor 110, a front end voltage at the impedance matching mountain 6, U2 is the output voltage of the high frequency current sensor 110. 一般而言,高频电流传感器110的传输阻抗大于5mV/mA。 Generally, the impedance of the transmission high-frequency current sensor 110 is greater than 5mV / mA.

[0067] 本实施例高频局部放电检测仪检定系统的检定方法还包括对高频电流传感器110 进行检测频带检定的步骤,详细步骤包括: [0067] The assay method of the present embodiment, the high frequency partial discharge detector test system further comprises a step of high-frequency current sensor 110 detects a frequency band verification, the detailed steps comprising:

[0068] 4.1)连接布置待检定的高频电流传感器110; [0068] 4.1) arranged to be connected to a high-frequency test current sensor 110;

[0069] 4.2)保持工频电流发生器2及标准局放信号发生器3关闭,打开调频调幅信号发生器1,调节调频调幅信号发生器1输出信号峰值为IV的正弦信号并维持不变; [0069] 4.2) maintaining frequency current generator 2 and a standard PD signal generator 3 is closed, open AM FM signal generator 1, a regulating output signal peak amplitude modulation signal generator is a frequency modulated sinusoidal signal remains unchanged and IV;

[0070] 4.3)在100kHz~50MHz范围内逐步调节调频调幅信号发生器1的输出信号频率,且在100kHz~1MHz频率范围内检测步长为100kHz,lMHz~50MHz频率范围内检测步长为1MHz; 在调节调频调幅信号发生器1输出信号频率的过程中,记录调频调幅信号发生器1输出信号的频率和示波器7采集的高频电流传感器110的输出电压幅值; [0070] 4.3) adjusted stepwise within the range of the output signal frequency of 100kHz ~ 50MHz AM FM signal generator 1, and within the detection frequency range of 100kHz ~ 1MHz steps of 100kHz, the lMHz ~ 50MHz frequency range of 1MHz detecting step; FM-AM in regulating the output signal frequency of the signal generator 1, the recording current sensor outputs the high frequency voltage amplitude and frequency oscilloscope AM FM signal generator output signal 110 collected 7;

[0071] 4.4)根据调频调幅信号发生器1输出信号的频率和高频电流传感器110的输出电压幅值绘制出检测频带曲线,如图2所示,找出高频电流传感器110的输出电压幅值从最大值下降到最大值的0.5倍(_6dB)时调频调幅信号发生器1输出信号的上下截止频率,从而得到高频电流传感器11 〇检测频带的上下截止频率fi和f 2。 [0071] 4.4) plotted based on the output voltage amplitude and the frequency of the high frequency current sensor AM FM signal generator 1 the output signal of the detection band of curve 110, shown in Figure 2, to identify the high-frequency output voltage of the current sensor 110 of the web upper and lower cutoff frequency of the FM signal output AM signal generator 1 drops from the maximum value to the maximum value of 0.5 times (_6dB), to thereby obtain vertical high-frequency current sensor 11 billion detection band cutoff frequency fi and f 2. 一般而言,高频电流传感器110的检测频带在3M~30MHz之间,且和产品出厂说明书的规定值误差不超过± 10%。 In general, high frequency current sensor 110 detects a frequency band of between 3M ~ 30MHz, and the predetermined value and the error does not exceed the specification factory ± 10%.

[0072] 本实施例高频局部放电检测仪检定系统的检定方法还包括对高频局部放电检测仪11进行线性度检定的步骤,详细步骤包括: [0072] The assay method of Example frequency partial discharge detector test system of the present embodiment further comprises the step of high-frequency partial discharge detector 11 for linearity verification, the detailed steps comprising:

[0073] 5.1)连接布置待检定的高频局部放电检测仪11及其高频电流传感器110; [0073] 5.1) arranged to be connected to a high frequency partial discharge detection test instrument 11 and the high-frequency current sensor 110;

[0074] 5.2)保持工频电流发生器2及标准局放信号发生器3关闭;打开调频调幅信号发生器1,调节调频调幅信号发生器1输出3MHz~30MHz之间的某一指定频率的正弦信号,且调节调频调幅信号发生器1输出信号的幅值使高频局部放电检测仪11达到满量程,记录此时调频调幅信号发生器1输出的峰值电压U4P高频局部放电检测仪11的满量程幅值A m; [0074] 5.2) holding the current generator 2 and the frequency standard signal generator 3 PD closed; open the FM signal generator 1 AM, FM-AM adjustment signal generator 1 outputs a given sinusoidal frequency between 3MHz ~ 30MHz signal, and adjusting the amplitude of the amplitude modulated signal FM signal generator 1 outputs high-frequency partial discharge detector 11 reaches full scale record the peak voltage of the FM signal output from the AM frequency generator U4P partial discharge detector 11 of the full range amplitude A m;

[0075] 5.3)依次降低调频调幅信号发生器1输出信号的幅值至AUm,其中参数λ分别为小于1且大于0的一组递减数值,记录不同参数λ下高频局部放电检测仪11输出的幅值Αα; [0075] 5.3) successively reducing the magnitude of the output signal of FM-AM signal generator 1 to Aum, respectively, wherein the parameter λ is less than 1 and greater than a set value is decremented to 0, for 11 recording various parameters λ outputs the high frequency partial discharge detector the magnitude Αα;

[0076] 5.4)中心控制单元8根据公式⑶计算高频局部放电检测仪11在不同参数λ取值测量点的线性度误差: [0076] 5.4) 11 central control unit 8 calculates the value measured at different points of the parameter λ linearity error frequency partial discharge detector according to the formula ⑶:

Figure CN105223530BD00111

[0078] 式⑶中,ε为高频局部放电检测仪11在某一个参数λ取值测量点的线性度误差,Αλ 为该参数λ取值下高频局部放电检测仪11输出的幅值,Am*高频局部放电检测仪11的满量程幅值。 [0078] In the formula ⑶, ε 11 at a certain value of a parameter [lambda] linearity error of measurement points is high-frequency partial discharge detector, Αλ amplitude parameter λ 11 outputs the high frequency partial discharge at the value for the detector, Am * high frequency partial discharge detector 11 of the full scale magnitude. 一般而言,高频局部放电检测仪11的线性度误差要求和产品出厂说明书的规定值误差不超过±10 %。 In general, the high frequency partial discharge detector of claim 11 linearity error and predetermined error value does not exceed the specification factory ± 10%.

[0079] 本实施例高频局部放电检测仪检定系统的检定方法还包括对高频局部放电检测仪11进行灵敏度检定的步骤,详细步骤包括: [0079] The assay method of Example frequency partial discharge detector test system of the present embodiment further includes the step of assay sensitivity for high frequency partial discharge detector 11, detailed steps comprising:

[0080] 6.1)连接布置待检定的高频局部放电检测仪11及其高频电流传感器110; [0080] 6.1) arranged to be connected to a high frequency partial discharge detection test instrument 11 and the high-frequency current sensor 110;

[0081] 6.2)保持调频调幅信号发生器1及工频电流发生器2关闭;打开标准局放信号发生器3,控制标准局放信号发生器3的输出信号幅值为0,通过高频局部放电检测仪11记录此时高频电流传感器110的初始输出电压幅值A1; [0081] 6.2) remains AM FM signal generator 1 and the off-frequency current generator 2; open standard PD signal generator 3, the standard PD control signal generator output signal amplitude is 0 3, a high frequency local record the discharge detector 11 high-frequency current initial sensor output voltage amplitude of A1 110;

[0082] 6.3)从零开始逐步增加标准局放信号发生器3的输出信号幅值,并通过高频局部放电检测仪11记录此时高频电流传感器110的当前输出电压幅值A2;当满足当前输出电压幅值A2超过初始输出电压幅值A1的两倍时,记录此时标准局放信号发生器3的输出信号幅值Q,该输出信号幅值Q即为高频局部放电检测仪11的灵敏度。 [0082] 6.3) gradually increasing the standard zero-PD output signal amplitude signal generator 3, and the high frequency partial discharge detector 11 at this time a high-frequency current sensor records the current output voltage amplitude A2 110; and when satisfied when the current output voltage amplitude A2 than twice the initial output voltage amplitude of A1 record the standard PD signal generator output signal amplitude of the Q 3, Q is the amplitude of the output signal of the high frequency partial discharge detector 11 sensitivity. 一般而言,高频局部放电检测仪11的灵敏度要求一般不超过10pC。 Generally sensitivity, high-frequency partial discharge detector 11 is not more than required 10pC.

[0083] 以上所述仅是本发明的优选实施方式,本发明的保护范围并不仅局限于上述实施例,凡属于本发明思路下的技术方案均属于本发明的保护范围。 [0083] The above are only preferred embodiments of the present invention, the scope of the present invention is not limited to the above embodiments, where the aspect belonging to the idea of ​​the present invention belong to the scope of the present invention. 应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理前提下的若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。 It should be noted that one of ordinary skill in the art, in the next several improvements and modifications without departing from the principles of the invention premise of these improvements and modifications should also be considered as the scope of the invention.

Claims (9)

1. 一种高频局部放电检测仪检定系统,其特征在于:包括调频调幅信号发生器(1)、工频电流发生器(2)、标准局放信号发生器(3)、信号调理模块(4)、同轴电缆(5)、匹配阻抗(6)、示波器⑵和中心控制单元(8),所述调频调幅信号发生器⑴的输出端、标准局放信号发生器(3)的输出端分别与信号调理模块⑷的输入端相连,所述信号调理模块⑷的输出端依次通过同轴电缆(5)、匹配阻抗(6)接地,被检定高频局部放电检测仪(11)的高频电流传感器(110)同时套设于匹配阻抗(6)的接地电缆、工频电流发生器(2)的输出电缆上,所述工频电流发生器⑵的电流输出端通过输出电缆和电流回流输入端相连,所述示波器⑵的一路检测端子与匹配阻抗(6)的前端相连、另一路检测端子与高频电流传感器(110)的输出端相连,所述示波器(7)的输出端与中心控制单元(8)相连,所述中心 1. A high-frequency partial discharge detector test system, characterized by: a frequency modulation amplitude modulation signal generator (1), frequency current generator (2), the standard PD signal generator (3), signal conditioning modules ( output terminal 4), a coaxial cable (5), matching impedance (6), and the oscilloscope ⑵ central control unit (8), the frequency modulation amplitude modulation signal generator output terminal ⑴ standard PD signal generator (3) are respectively connected to an input signal conditioning module ⑷, the signal conditioning module ⑷ sequentially output terminal through a coaxial cable (5), matching impedance (6) is grounded, the test frequency partial discharge detector (11) of the high-frequency ground cable on the current sensor output cable (110) sleeved on while matching impedance (6), the frequency current generator (2), the working frequency of the current generator current output terminal through the output cable and ⑵ reflux current input end connected to the detection terminal is connected to front end all the way to match the impedance (6) of the oscilloscope ⑵, the other connected to the output terminal of the high-frequency current passage detection sensor (110), the output of the oscilloscope (7) with a central control means (8) is connected to said center 控制单元(8)分别与调频调幅信号发生器(1)、工频电流发生器(2)、标准局放信号发生器⑶的控制端相连。 The control unit (8), respectively AM FM signal generator (1), frequency current generator (2), the standard PD control terminal is connected to the signal generator ⑶.
2. 根据权利要求1所述的高频局部放电检测仪检定系统,其特征在于:所述信号调理模块⑷包括通道切换电路、阻抗变换电路、信号放大电路、去噪滤波电路和增益调节电路,所述调频调幅信号发生器⑴的输出端、标准局放信号发生器⑶的输出端分别与通道切换电路的输入端相连,所述通道切换电路的输出端依次通过阻抗变换电路、信号放大电路、去噪滤波电路和增益调节电路的输入端相连,所述增益调节电路的输出端依次通过同轴电缆(5)、匹配阻抗(6)接地。 The high-frequency partial discharge detector test system according to claim 1, wherein: said channel comprises a signal conditioning module ⑷ switching circuit, the impedance conversion circuit, a signal amplifying circuit, a noise removal filter circuit and the gain adjustment circuit, the output of the signal generator FM AM ⑴, the standard PD ⑶ input signal generator output terminal respectively connected to the channel switching circuit, the output of the switching circuit of the impedance conversion circuit passes through the channel, a signal amplifying circuit, filtering of the circuit and the gain adjustment circuit input terminal, an output terminal of the gain adjustment circuit sequentially through a coaxial cable (5), matching impedance (6) is grounded.
3. 根据权利要求2所述的高频局部放电检测仪检定系统,其特征在于:所述中心控制单元⑶还连接有显示单元⑶和人机接口(10)。 3. The high-frequency partial discharge detector test system as recited in claim 2, wherein: said central control unit is also connected to a display unit ⑶ ⑶ and human-machine interface (10).
4. 一种权利要求1或2或3所述的高频局部放电检测仪检定系统的检定方法,其特征在于,包括对高频电流传感器(110)进行饱和特性检定的步骤,详细步骤包括: 1.1) 连接布置待检定的高频电流传感器(110),并将高频电流传感器(110)的输出端和高频局部放电检测仪(11)相连; 1.2) 保持标准局放信号发生器(3)关闭,打开调频调幅信号发生器(1),调节调频调幅信号发生器⑴输出频率为10MHz、峰值为IV的正弦信号并维持不变; 1.3) 打开工频电流发生器(2)并从零开始逐渐增大输出电流,记录工频电流发生器(2) 的电流值和高频局部放电检测仪(11)检测的高频电流传感器(110)的输出电压幅值,当高频电流传感器(110)的输出电压幅值降低到原幅值的1/2时,记录此时工频电流发生器(2) 的电流值作为高频电流传感器(110)的实测工频饱和电流I,并根据式(1)计算高频电流 Verification Method detector test frequency PD 4. A system according to claim 1 or 2 or 3, characterized in that, comprising a high-frequency current sensor (110) for saturation characteristic verification step, detailed steps comprising: 1.1) arranged to be connected to a high-frequency current sensor verification (110), and a high-frequency current sensor (110) and the output terminal of the high frequency partial discharge detector (11) is connected; 1.2) remains the standard PD signal generator (3 ) is closed, open AM FM signal generator (1), adjusting the frequency modulated AM signal generator output frequency ⑴ 10MHz, IV peak sinusoidal signals and unchanged; 1.3) open-frequency current generator (2) and from zero gradually increases the output current, the recording frequency current generator (2) and the current value of the high frequency partial discharge detector (11) outputs the detected high-frequency current sensor (110) of the voltage amplitude, when the high frequency current sensor ( 1/2 110) to reduce the amplitude of the output voltage amplitude of the original, the recording current value at this time-frequency current generator (2) as a high-frequency current sensor (110) the measured frequency saturation current I, and in accordance with calculating a high frequency current of formula (1) 感器(110)的饱和电流值误差; Sensors (110) of the saturation current error value;
Figure CN105223530BC00021
⑴ 式(1)中,ΛΙ为高频电流传感器(110)的饱和电流值误差,I为高频电流传感器(110)的实测工频饱和电流,Ig为高频电流传感器(110)的标称工频饱和电流值。 ⑴ formula (1), ΛΙ high frequency current sensor (110) error saturation current, I is a high-frequency current sensor (110) the measured frequency saturation current, Ig high frequency current sensor (110) nominal frequency saturation current value.
5. 根据权利要求4所述的高频局部放电检测仪检定系统的检定方法,其特征在于,还包括对高频电流传感器(110)进行幅频特性检定的步骤,详细步骤包括: 2.1) 连接布置待检定的高频电流传感器(110); 2.2) 保持工频电流发生器(2)及标准局放信号发生器(3)关闭,打开调频调幅信号发生器(1),调节调频调幅信号发生器⑴输出信号峰值为IV的正弦信号并维持不变; 2.3) 在100kHz~50MHz范围内逐步调节调频调幅信号发生器⑴的输出信号频率,且在100kHz~1MHz频率范围内检测步长为100kHz,lMHz~50MHz频率范围内检测步长为1MHz;在调节调频调幅信号发生器⑴输出信号频率的过程中,记录调频调幅信号发生器⑴输出信号的频率和示波器(7)输出的高频电流传感器(110)的输出电压幅值; 2.4) 通过中心控制单元⑶根据调频调幅信号发生器⑴输出信号的频率和示波器(7) 输出的高频电流传感 The assay method according to the high frequency partial discharge detector test system of claim, wherein further comprising the step of high-frequency current sensor (110) for amplitude-frequency characteristics of the test, the detailed steps comprising: 2.1) connection high-frequency current to be detected is arranged a sensor (110); 2.2) maintaining frequency current generator (2) and the standard PD signal generator (3) is closed, open AM FM signal generator (1), adjustment signal generating FM-AM ⑴ an output signal of the peak sinusoidal signal remains unchanged and IV; 2.3) in the range of 100kHz ~ 50MHz stepwise adjustment of the output signal frequency of the FM-AM ⑴ signal generator, and within the frequency range of 100kHz ~ 1MHz detecting step is 100kHz, lMHz ~ 50MHz in the frequency range of 1MHz detecting step; FM-AM in regulating ⑴ signal generator output signal frequency, the frequency of the recording signal generator and oscilloscope FM-AM ⑴ high frequency current output signal of the sensor (7) output ( 110) an output voltage amplitude; 2.4) by the central control unit according to the frequency ⑶ AM FM signal generator and oscilloscope ⑴ sensing a high frequency current output signal (7) output 器(110)的输出电压幅值绘制出高频电流传感器(110)在100kHz~ 50MHz的幅频特性曲线。 Output voltage amplitude (110) to draw the high-frequency current sensor (110) in the web 100kHz ~ 50MHz frequency characteristic.
6. 根据权利要求5所述的高频局部放电检测仪检定系统的检定方法,其特征在于,还包括对高频电流传感器(110)进行传输阻抗检定的步骤,详细步骤包括: 3.1) 连接布置待检定的高频电流传感器(110); 3.2) 保持工频电流发生器(2)及标准局放信号发生器(3)关闭,打开调频调幅信号发生器(1),调节调频调幅信号发生器⑴输出信号峰值为IV、信号频率为10MHz的正弦信号并维持不变; 3.3) 通过示波器⑵分别记录匹配阻抗(6)的前端电压山和高频电流传感器(110)的输出电压U2; 3.4) 中心控制单元⑶根据式⑵计算高频电流传感器(110)的传输阻抗; The assay method of the high frequency partial discharge detector test system of claim, wherein further comprising the step of high-frequency current sensor (110) for the transfer impedance test, the detailed steps comprising: 3.1) connection arrangement a high-frequency current sensor (110) to be characterized; 3.2) maintaining frequency current generator (2) and the standard PD signal generator (3) is closed, open AM FM signal generator (1), FM-AM adjustment signal generator ⑴ peak output signal IV, the signal frequency of 10MHz and a sinusoidal signal remains unchanged; 3.3) are recorded by an oscilloscope ⑵ matching impedance (6) and the front end of a high-frequency current sensor voltage hill (110) an output voltage U2; 3.4) the central control unit calculates ⑶ high frequency current sensor (110) according to formula ⑵ transfer impedance;
Figure CN105223530BC00031
(2) 式(2)中,Z为高频电流传感器(110)的传输阻抗,山为匹配阻抗(6)的前端电压,U2为高频电流传感器(110)的输出电压。 (2) Formula (2), Z is a high-frequency current sensor (110) of the transfer impedance, the matching front end mountain impedance voltage (6), U2 is the output voltage of a high frequency current sensor (110).
7. 根据权利要求6所述的高频局部放电检测仪检定系统的检定方法,其特征在于,还包括对高频电流传感器(110)进行检测频带检定的步骤,详细步骤包括: 4.1) 连接布置待检定的高频电流传感器(110); 4.2) 保持工频电流发生器(2)及标准局放信号发生器(3)关闭,打开调频调幅信号发生器(1),调节调频调幅信号发生器⑴输出信号峰值为IV的正弦信号并维持不变; 4.3) 在100kHz~50MHz范围内逐步调节调频调幅信号发生器⑴的输出信号频率,且在100kHz~1MHz频率范围内检测步长为100kHz,lMHz~50MHz频率范围内检测步长为1MHz;在调节调频调幅信号发生器⑴输出信号频率的过程中,记录调频调幅信号发生器⑴输出信号的频率和示波器(7)采集的高频电流传感器(110)的输出电压幅值; 4.4) 根据调频调幅信号发生器(1)输出信号的频率和高频电流传感器(110)的输出电压幅值绘制出检测 The assay method of claim 6 the high-frequency partial discharge detector test system of claim, wherein further comprising the step of high-frequency current sensor (110) detecting the frequency band of the test, the detailed steps comprising: 4.1) connection arrangement a high-frequency current sensor (110) to be characterized; 4.2) maintaining frequency current generator (2) and the standard PD signal generator (3) is closed, open AM FM signal generator (1), FM-AM adjustment signal generator ⑴ peak output signal IV of the sinusoidal signal and unchanged; 4.3) in the range of 100kHz ~ 50MHz stepwise adjustment of the output signal frequency of the FM-AM ⑴ signal generator, and within the detection frequency range of 100kHz ~ 1MHz steps of 100kHz, lMHz - detecting the frequency range of 50MHz to 1MHz step; ⑴ in regulating the output frequency of the frequency modulated signal amplitude modulated signal generator, the frequency of the recording signal generator and oscilloscope ⑴ FM-AM output signal (7) high frequency current collected by the sensor (110 ) of the output voltage amplitude; 4.4) in accordance with FM-AM signal generator output frequency and high-frequency current sensor (110) (1) of the output signal voltage amplitude detecting drawn 带曲线,找出高频电流传感器(110)的输出电压幅值从最大值下降到最大值的0.5倍时调频调幅信号发生器⑴输出信号的上下截止频率,从而得到高频电流传感器(110)检测频带的上下截止频率。 With the curve, to identify the vertical high-frequency cutoff frequency of the output current sensor (110) drops from the maximum voltage amplitude to a maximum amplitude of the FM signal generator output signal ⑴ 0.5 times, thereby obtaining a high-frequency current sensor (110) upper and lower cutoff frequency detection band.
8. 根据权利要求7所述的高频局部放电检测仪检定系统的检定方法,其特征在于,还包括对高频局部放电检测仪(11)进行线性度检定的步骤,详细步骤包括: 5.1) 连接布置待检定的高频局部放电检测仪(11)及其高频电流传感器(110); 5.2) 保持工频电流发生器(2)及标准局放信号发生器(3)关闭;打开调频调幅信号发生器(1),调节调频调幅信号发生器⑴输出3MHz~30MHz之间的某一指定频率的正弦信号,且调节调频调幅信号发生器(1)输出信号的幅值使高频局部放电检测仪(11)达到满量程,记录此时调频调幅信号发生器(1)输出的峰值电压仏和高频局部放电检测仪(11)的满量程幅值Am; 5.3) 依次降低调频调幅信号发生器(1)输出信号的幅值至AUm,其中参数λ分别为小于1 且大于0的一组递减数值,记录不同参数λ下高频局部放电检测仪(11)输出的幅值Αα; 5.4) 中心控制单元⑶ 8. The assay method of claim 7 high frequency partial discharge detector test system according to claim, wherein further comprising the step of high-frequency partial discharge detector (11) for linearity verification, the detailed steps comprising: 5.1) a high-frequency connection arrangement to be detected partial discharge detector (11) and a high-frequency current sensor (110); 5.2) maintaining frequency current generator (2) and the standard PD signal generator (3) is closed; opening FM-AM a signal generator (1), FM-AM adjustment signal generator outputs a sinusoidal signal having a specified ⑴ frequency between 3MHz ~ 30MHz, and amplitude adjusting (1) the output signal of the high-frequency signal generator AM FM partial discharge detection instrument (11) reaches full scale, this time recording FM AM signal generator (1) Fo peak voltage and a high frequency partial discharge detector (11) output from the full-scale amplitude Am; 5.3) in descending order FM-AM signal generator amplitude (1) of the output signal to Aum, respectively, wherein the parameter λ is less than 1 and greater than a set value is decremented to 0, the amplitude of the different recording parameters λ Αα (11) outputs a high-frequency partial discharge detector; 5.4) Center The control unit ⑶ 根据公式(3)计算高频局部放电检测仪(11)在不同参数λ取值测量点的线性度误差: (3) calculating a high-frequency partial discharge detector (11) at different values ​​of parameters of the measurement points λ linearity error according to the formula:
Figure CN105223530BC00041
C3) 式⑶中,ε为高频局部放电检测仪(11)在某一个参数λ取值测量点的线性度误差, 该参数λ取值下高频局部放电检测仪(11)输出的幅值,Am*高频局部放电检测仪(11)的满量程幅值。 C3) In the formula ⑶, [epsilon] is high-frequency partial discharge detector (11) in a linearity error of a measured value of the parameter λ point, the value of the parameter λ frequency PD amplitude detector (11) output , Am * high frequency partial discharge detector (11) full-scale amplitude.
9.根据权利要求8所述的高频局部放电检测仪检定系统的检定方法,其特征在于,包括对高频局部放电检测仪(11)进行灵敏度检定的步骤,详细步骤包括: 6.1) 连接布置待检定的高频局部放电检测仪(11)及其高频电流传感器(110); 6.2) 保持调频调幅信号发生器⑴及工频电流发生器(2)关闭;打开标准局放信号发生器(3),控制标准局放信号发生器⑶的输出信号幅值为0,通过高频局部放电检测仪(11)记录此时高频电流传感器(110)的初始输出电压幅值A1; 6.3) 从零开始逐步增加标准局放信号发生器(3)的输出信号幅值,并通过高频局部放电检测仪(11)记录此时高频电流传感器(110)的当前输出电压幅值A2;当满足当前输出电压幅值A2超过初始输出电压幅值A1的两倍时,记录此时标准局放信号发生器(3)的输出信号幅值Q,该输出信号幅值Q即为高频局部放电检测仪(11)的灵敏度。 9. The method of claim 8 assay frequency partial discharge detector test system according to claim, characterized in that it comprises the step of high-frequency partial discharge detector (11) sensitivity test, the detailed steps comprising: 6.1) connection arrangement the frequency to be detected partial discharge detector (11) and a high-frequency current sensor (110); 6.2) held ⑴ AM FM signal generator and frequency current generator (2) off; open standard PD signal generator ( 3), the standard PD control signal generator ⑶ output signal amplitude is 0, at this time a high-frequency recording current sensor (110) an initial output voltage amplitude A1 of high frequency partial discharge detector (11); 6.3) from gradually increasing the standard zero PD signal generator (3) the output signal amplitude, frequency and recorded by partial discharge detector (11) At this time, a high-frequency current sensor (110) is the current output voltage amplitude A2; satisfied when when the current output voltage amplitude A2 than twice the initial output voltage amplitude of A1 record the standard PD signal generator (3) the magnitude of the output signal of Q, Q is the amplitude of the output signal of the high frequency partial discharge detection sensitivity of the instrument (11).
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