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CN201449433U - Device for locating ground fault of DC system - Google Patents

Device for locating ground fault of DC system Download PDF

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Publication number
CN201449433U
CN201449433U CN 200920049883 CN200920049883U CN201449433U CN 201449433 U CN201449433 U CN 201449433U CN 200920049883 CN200920049883 CN 200920049883 CN 200920049883 U CN200920049883 U CN 200920049883U CN 201449433 U CN201449433 U CN 201449433U
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ground
device
dc
system
signal
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CN 200920049883
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Chinese (zh)
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王道龙
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王道龙
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Abstract

The utility model discloses a device for locating ground fault of DC system, including a signal generator connected to the bus-bar wire and ground wire of the DC system, a signal collection device clamping the line to be detected of the DC system and a fault detector connected with the signal collection device. The beneficial effects of the utility model is that the device is capable of adapting DC systems of various voltage gradations, improving detection range and anti-jamming capability greatly by setting the signal collection device, the signal generator and the fault detector. The device can be used to detect the DC system in modes of indirect ground, non-metal ground, loop ground, positive and negative electrodes ground simultaneously, and multi-point ground, and can provide accurately system voltage, ground voltage, ground resistance, etc.

Description

直流系统接地故障定位装置 The system DC ground fault locating device

技术领域 FIELD

[0001] 本实用新型涉及一种定位装置,特别是一种直流系统接地故障定位装置。 [0001] The present invention relates to a positioning device, in particular a system DC ground fault locating device.

背景技术 Background technique

[0002] 电力系统中的直流系统接地故障是一种易发生且对电力系统危害性较大的故障。 [0002] DC system ground fault power system is a power system and prone to failure harmfulness. 无论是正极接地或者负极接地,在两点接地的情况下,都可能造成保护误动或者保护拒动, 危害系统正常运行。 Whether it is positive ground or negative ground, in the case of two-point grounding, protection may cause malfunction or protection tripping hazards normal system operation. 由于直流系统的复杂性和动态性,直流接地故障往往难以定位,同时由于微机保护和综合自动化系统的广泛应用,又对直流系统接地检测装置的准确性和安全性提出了更高的要求。 Because of the complexity and dynamic, are often difficult to locate DC ground fault of the DC system, and because protection of widely used computer and integrated automation systems, but also on the accuracy and safety of the system DC ground fault detecting device is a higher requirement.

发明内容 SUMMARY

[0003] 本实用新型的目的在于提供一种定位准确,能对各种复杂接地故障进行准确检测的直流系统接地故障定位装置。 [0003] The object of the present invention is to provide an accurate positioning, the system DC ground fault locating means can accurately detect the ground fault complex.

[0004] 本实用新型为解决其技术问题所采用的技术方案是: [0004] The technical solution of the present invention to solve the technical problem is that:

[0005] 直流系统接地故障定位装置,包括连接于直流系统母线及地线的信号发生器、夹持直流系统待检测线路的信号采集器和连接信号采集器的故障检测器。 [0005] DC system ground fault locating means comprises a fault detector connected to the DC bus and the ground system of a signal generator, a signal acquisition system to be detected DC clamping circuit and connected to the signal acquisition.

[0006] 作为上述方案的进一步改进,所述信号发生器包括信号发生单元及信号收集单元,所述信号发生单元输出端连接信号整形单元,信号整形单元输出端连接信号输出单元, 信号输出单元直流系统,所述信号收集单元输入端与直流系统连接,其输出端连接信号分析单元,所述信号分析单元输出端连接信号发生单元。 [0006] As a further improvement of the above-described embodiment, the signal generator comprises a signal generator and a signal collection unit, said signal generating means connected to the output of signal shaping means, signal shaping means connected to the output terminal of the signal output unit, the signal output unit DC system, a signal collecting unit and the input terminal of the DC system is connected, an output terminal connected to a signal analyzing unit, a signal analyzing unit connected to an output terminal of the signal generating means.

[0007] 作为上述方案的进一步改进,所述信号发生器设有液晶显示屏、指示灯及开关按钮,所述液晶显示屏与信号分析单元连接。 [0007] As a further improvement of the above-described embodiment, the signal generator is provided with the LCD indicator and switch button, the LCD display unit is connected to the signal analysis.

[0008] 作为上述方案的进一步改进,所述故障检测器包括信号采集单元,所述信号采集单元输出端连接信号放大单元,信号放大单元输出端连接滤波单元,滤波单元输出端连接模数转换单元,模数转换单元连接信号处理单元,所述信号处理单元输出端连接故障分析单元。 [0008] As a further improvement of the above-described embodiment, the fault detector includes a signal acquisition unit, a signal acquisition unit connected to an output terminal of the signal amplifying means, a signal amplifying unit connected to the output terminal of the filter unit, the filter unit is connected to the output terminal of analog to digital conversion unit , analog-digital conversion unit connected to the signal processing unit, the signal processing unit connected to the output terminal of the failure analysis unit.

[0009] 作为上述方案的进一步改进,所述故障检测器设有显示屏、状态指示灯及控制按钮,所述显示屏与故障分析单元连接。 [0009] As a further improvement of the above-described embodiment, the fault detector is provided with a display screen, status indicators and control buttons, and a display unit connected to the failure analysis.

[0010] 作为上述方案的进一步改进,所述信号采集器为钳表。 [0010] As a further improvement of the above-described embodiment, the collector of the Clamp signal. 所述信号采集器前端设有钳紧检测导线的沟头,沟头后侧设有方向标示、钳表开合按钮及电源指示灯,信号采集器后端设有输出端。 The signal acquisition is provided with a front end head clincher groove detector wire, with the rear side of the first groove direction flag, clamp opening and closing button and power indicator, a signal output terminal is provided with the rear end of the collector.

[0011] 本实用新型的有益效果是:本实用新型的直流系统接地故障定位装置能够适用于各种电压等级的直流系统,其配备了信号采集器,并通过信号发生器和故障检测器对多种信号的高效处理大大提高了检测范围与抗干扰能力,本实用新型可对直流系统间接接地、 非金属接地、环路接地、正负同时接地、正负平衡接地、多点接地进行准确检测,并且还能准确的显示系统电压、对地电压、接地阻值、支路接在阻抗值真正解决了运行及检修人员的后 [0011] The beneficial effects of the present invention are: the system of the present invention a DC ground fault locating means can be applied to a variety of voltage levels of the DC system, which is equipped with a data acquisition device, and the signal generator and the multi-failure detector efficient handling kinds of signals greatly improves detection range and anti-jamming capability, the present invention may be indirectly grounded DC system, non-metallic ground, the ground loop, while the positive and negative ground, the balance of positive and negative ground, multi-point grounding accurate detection, and also accurately display the system voltage, ground voltage, the ground resistance, the resistance value connected to the branch really solve the operation and maintenance personnel

3顾之忧。 3 Gu worries. 附图说明 BRIEF DESCRIPTION

[0012] 下面结合附图和实施例对本实用新型作进一步说明: Figures and examples further illustrate the present invention as [0012] in conjunction with the following:

[0013] 图1为本实用新型信号发生器原理图; [0013] Figure 1 is a schematic diagram of a signal generator disclosure;

[0014] 图2为本实用新型信号发生器的结构示意图; [0014] FIG. 2 is a schematic structural diagram of the invention the signal generator;

[0015] 图3为本实用新型故障检测器原理图; [0015] The present invention FIG 3 Schematic failure detector;

[0016] 图4为本实用新型故障检测器的结构示意图; [0016] Fig 4 a schematic view of the structure of the invention of the present failure detector;

[0017] 图5为本实用新型信号采集器的结构示意图; [0017] FIG. 5 is a schematic structural diagram of a signal acquisition invention;

[0018] 图6为本实用新型的原理图; [0018] FIG. 6 is a schematic diagram of the invention;

[0019] 图7为本实用新型的使用状态图。 [0019] FIG. 7 of the present invention using a state diagram.

具体实施方式 detailed description

[0020] 参照图1〜图5,本实用新型的直流系统接地故障定位装置,包括连接于直流系统母线及地线的信号发生器1、夹持直流系统待检测线路的信号采集器3和连接信号采集器的故障检测器2。 [0020] Referring to FIG. 1 ~ 5, the present invention system DC ground fault locating device, the system comprising a DC bus connected to the ground and the signal generator 1, the system to be sandwiched DC signal acquisition and detection circuit 3 is connected fault detector signal acquisition device 2.

[0021] 所述信号发生器1包括信号发生单元11及信号收集单元14,所述信号发生单元11输出端连接信号整形单元12,信号整形单元12输出端连接信号输出单元13,信号输出单元13直流系统,所述信号收集单元14输入端与直流系统连接,其输出端连接信号分析单元15,所述信号分析单元15输出端连接信号发生单元11 ;并且信号发生器1设有液晶显示屏16、指示灯17及开关按钮18,所述液晶显示屏16与信号分析单元15连接。 [0021] The signal generator 113, the signal output unit includes a signal generation unit 11 and the signal collecting unit 14, an output terminal 11 of the signal generation unit 12 connected to the signal shaping means, signal shaping means 12 connected to the output terminal of the signal output unit 13 DC system, the signal collecting unit 14 and the input terminal of the DC system is connected, an output terminal connected to the signal analyzing unit 15, the output of the signal analysis unit 15 connected to the signal generating unit 11; and the signal generator 1 is provided with the LCD 16 , the indicator 17 and the switch button 18, the LCD 16 and the signal analyzing unit 15 is connected. 其中,指示灯17包括电源灯,电源灯亮表示信号发生器1正常开启,正常灯,正常灯亮表示系统无接地故障,正、负接地灯,分别表示系统正、负接地故障。 Wherein, the indicator lamp 17 includes a power supply, the power light signal generator 1 indicates normally open, normal light, normal light indicates the system without a ground fault, the positive, negative ground lights, systems represent positive and negative ground fault. 开关按钮18控制信号发生器1开关。 Switch button 18 controls the switching signal generator. 本实用新型的信号发生器1采用电池作为电源。 Signal generator of the present invention uses a battery as a power. 在使用前应检查或更换电池,以保证电池电量。 Should be checked prior to use or replacing the battery, to ensure the battery. 当直流系统发生接地故障或绝缘降低,整个直流系统绝缘电阻小于报警整定值时,直流系统电压监测装置发出警报时,将信号发生器1接入直流系统,信号发生器1判断系统的电压等级、接地故障的极性、绝缘程度,并分析绝缘监测平衡电桥回路接线方式和平衡电桥电阻大小,形成信号输出的智能反馈,向直流正、负母线和地间,发射适宜系统检测、对系统无影响的O. 178Hz以下的低频信号,并实时显示系统电压、正对地电压、负对地电压和系统对地绝缘总阻抗。 When the DC ground fault or insulation system decreases, the insulation resistance is less than the entire DC system alarm set value, the DC system voltage monitoring device alarm, the voltage level of the DC system access signal generator 1, a signal generator determining system, polarity, a ground fault degree of insulation, the insulation monitoring and analysis of electrical circuit wiring and balanced balancing resistor bridge size, form intelligent feedback signal outputted to the DC positive and negative busbars and between, the emission detection system suitable for the system O. no effect low-frequency signal below 178Hz, and display the system voltage, positive voltage to ground, and negative ground voltage insulation system total impedance to ground.

[0022] 所述故障检测器2包括信号采集单元21 ,所述信号采集单元21输出端连接信号放大单元22,信号放大单元22输出端连接滤波单元23,滤波单元23输出端连接模数转换单元24,模数转换单元24连接信号处理单元25,所述信号处理单元25输出端连接故障分析单元26 ;并设有显示屏27、状态指示灯28及控制按钮29,所述显示屏27与故障分析单元26 连接。 [0022] The fault detector 2 includes a signal acquisition unit 21, the signal acquisition unit 21 is connected to the output terminal of the signal amplifying unit 22, a signal amplifying unit 22 connected to the output terminal of the filter unit 23, 23 connected to the output end of the filter unit conversion unit 24, 25, 25 the output of the signal processing unit 24 is connected to analog-digital conversion unit connected to the signal processing unit fault analysis unit 26; and a display 27, status indicators 28 and control buttons 29, 27 and the display screen failure analysis unit 26 is connected. 其中,状态指示灯28包括电源灯,电源灯亮则表示故障检测器2开启,接地检测灯, 指示故障检测器2处于接地检测功能状态,阻抗测量灯,说明故障检测器2处于阻抗检测状态;控制按钮29包括控制检测器2开关的开关按钮,进行接地检测和阻抗检测转换的功能切换按钮,以及开始进行检测的启动按钮。 Wherein the status indicator 28 includes a power lamp, the power light indicates failure detector 2 is turned on, the ground fault detection light, indicating failure detector 2 is at the ground detection state, impedance measuring light, indicating a fault detector 2 in the impedance detection state; Control detector 29 comprises a control button switch button switch 2 performs ground fault detection function of converting impedance detection and switching button, and the start button to start detection. 故障检测器2通过信号采集器3检测各回路对地绝缘的直流信号漏电流,并模拟显示接地回路绝缘程度,判断出接地故障回路或支路,并继续沿着该回路或支路的检测,最终将故障点准确定位。 2 by a signal failure detector 3 detects the DC signal acquisition and leakage current of each of the insulating circuit and ground circuit simulation shows the degree of insulation, it is determined that a ground fault loop or branch, and continue along the branch circuit or detection, the final will accurately locate the point of failure.

[0023] 所述信号采集器3为钳表,前端设有钳紧检测导线的沟头31,沟头31后侧设有表示信号方向的方向标示32、钳表开合按钮33及电源指示灯34,信号采集器3后端设有输出端35。 [0023] The Clamp signal collector 3, the front end of the clincher detection wire provided with head grooves 31, the rear groove 31 head is provided with a direction signal indicating a direction marked 32, clamp opening and closing button 33 and the power indicator 34, the signal acquisition device 3 is provided with a rear end 35 an output terminal. 通过钳表开合按钮33控制信号采集器33的沟头31与待检测的电缆连接,电源指示灯34在故障检测器2处于开启状态,并与信号采集器3连接上时启动,输出端35用于与故障检测器2连接。 When cable 31 starts to be detected by opening and closing the clamp control signal acquisition button 33 groove head 33, power indicator 34 in a fault detector 2 is turned on, and connected to the signal acquisition device 3, the output terminal 35 2 with a fault detector is connected. 把信号采集器3的输出端35与故障检测器2连接后,开启故障检测器2, 用检测器上控制按钮29的功能切换按钮在接地检测档和阻抗测量档之间进行功能切换。 After the signal output terminal 2 connected to the collector 3 and the fault detector 35, fault detector 2 is turned on, with the detector control function button 29 to switch the button function of switching between the detection position and the ground impedance measurement profile. [0024] 信号发生器1的信号连线,分别连接正负母线和地线。 [0024] The signal generator 1, the signal wiring, are connected to the positive and negative bus bars and the ground. 确定信号发生器1正确接好后,打开信号发生器1的开关按钮18。 After determining the signal generator 1 is correctly connected, the signal generator opens the switch button 181.

[0025] 信号发生器1自适应不同电压等级的直流系统,系统无接地故障时,正常指示灯亮。 [0025] The adaptive signal generator different voltage DC system, the system without a ground fault, the normal indicator light. 液晶显示屏16显示接入直流系统电压、正对地电压、负对地电压。 The LCD 16 displays the access DC system voltage, positive voltage to ground, a negative voltage to ground. 系统有接地故障时, 信号发生器1自动判断接地极性,如果系统正接地,信号发生器1的指示灯17的正接地指示灯亮,在向系统输出信号的同时,正接地指示灯闪烁。 The system has a ground fault, the signal generator 1 automatically determines the polarity of the ground, if the system is grounded, a positive ground signal generator 17, a lamp lights up while the output signal of the system, is grounded indicator flashes. 如果系统负接地,负接地指示灯亮, 在向系统输出信号的同时,负接地指示灯闪烁。 If negative ground, negative ground indicator light, while the system output signal, negative ground flashes. 同时液晶显示屏16显示系统正对地电压、 负对地电压、系统对地绝缘总阻抗。 The LCD display 16 while the system is ground voltage, a negative voltage to ground, the total impedance of the insulation system. 根据直流系统接地故障的情况,将信号发生器1接到靠近蓄电池输出端的正、负母线和地线上。 The system DC ground fault situation, the signal generator 1 to the positive and negative bus lines close to the battery and the output terminal. 已检测到有接地但回路走向较远的支路,为提高检测精度,可把信号发生器1接在离故障区域更近的支路始端的直流保险出口处,或回路下面的直流小母线上。 It has been detected on the ground, but to far branch circuit, in order to improve the detection accuracy, can be connected to a DC safety outlet from the defective area closer to the leading end of the branch or small bus circuit following the DC signal generator . 检测时,应使信号发生器1始终接在直流支路的电源端,而故障检测器和钳表始终在直流支路的负荷端进行检测。 Detection, a signal generator 1 shall always connected to the DC power source terminal branch, the fault detector and the clamp are always detected at the load end of the DC branch.

[0026] 参照图6,将信号采集器3插头插入"故障检测器"钳表输入插孔,打开检测器电源。 [0026] Referring to FIG 6, the data acquisition device is inserted into the plug 3 "fault detector" Meter input jack, the power on the detector. 之后便可开始进行检测。 Then you can start testing.

[0027] 如果是正极接地,将信号采集器3钳在正极电缆上,检测方法同上;如果是负极接地,则将信号采集器3钳在负极电缆上,检测方法同上。 [0027] If a positive ground, the signal acquisition on the positive cable clamp 3, the detection method supra; if negative ground, then the signal acquisition on the negative cable clamp 3, the detection method above.

[0028] 在多回路线扎在一起时,将信号采集器3钳在这扎电缆上,检测方法同上,如果显示出是非接地,说明被检测的这扎电缆都没有接地故障;如果显示出是接地,说明被检测的这扎电缆中有一回路或多回路有接地故障,必须将该扎电缆分开检测,检测方法同上。 [0028] In the multi-return line tied together, the data acquisition device 3 in this clamp the cable tie, as above detection, if the non-grounded shows, this description are to be detected no ground fault cable tie; if shown to be ground, indicating that the cable tie to be detected in the path or loop Once a ground fault must be detected separately from the cable tie, detection methods above. [0029] 检测出接地支路后,对具体接地故障点进行定位检测。 [0029] After detecting the ground branch, a specific ground fault point location detection. 用户在检测时,可以采取二分法进行故障区域的检测定位。 Upon detecting the user can take dichotomy fault detection and location area. 在每次检测后,故障区域均按二分取点方式进行下一次的检测定位,以便迅速地检测出具体的接地故障点;假设在第一个位置处检测时有接地状况,在第二个位置处检测时没有接地状况,就可以判断接地故障点在第一位置与第二位置之间。 After each test, the defective area are by way of two dispensing point next detection and location, in order to quickly detect a particular point of a ground fault; assumed grounding condition is detected at a first position, at the second position no grounding condition, it can be determined when a ground fault is detected at the point between the first position and the second position. 同时可根据馈线电缆走向和设备连接情况,对故障支路的各个馈线入口分别进行检测,找出故障支路,进一步将故障定位。 While according to the feeder cable and the state of the connection, the respective feeder inlet, respectively the faulty branch is detected, identify the faulty branch, further fault location.

[0030] 系统有多个接地故障,或者正、负直流母线均有接地故障,在各回路的检测中,装置会自动探测出接地故障较严重的支路,然后检测出接地故障点。 [0030] The system has a plurality of ground fault, or the positive and negative DC bus has a ground fault detection in each circuit, the device will automatically detect more severe ground fault branch, and then detect a ground fault point. 检测中分析检测结果,接地故障较严重的正或负接地故障。 Detection of the detection result of the analysis, the more serious earth-fault positive or negative ground fault. 也可利用绝缘程度条和参考绝缘程度百分比的量化指数,比较测试结果的微小差异。 Slight difference in the degree of insulation strips may also be utilized and reference percentage degree of insulation of the quantization indices, the result of the comparison test. 该故障排除后再进行其他支路的检测,并将接地故障点逐一检测排除。 The troubleshooting after detecting the other branches, and remove the earth fault is detected by one point.

[0031] 本实用新型的直流系统接地故障定位装置可对接地点方向进行判定,其判定是由卡线时信号采集器3的方向标示32的箭头方向与故障检测器2所显示的箭头方向共同决定:以信号采集器3箭头方向为参考方向,在检测时,信号采集器3方向不变,当故障检测器2显示的箭头方向向下,说明接地点方向与信号采集器3箭头方向是相反方向;当故障检测 [0031] The present invention DC system ground fault location device may be docked location direction determination, which determination is made is indicated by the direction signal acquisition unit 3 when the card line arrow direction of the fault detector 32 in the direction of arrow 2 shown joint decision : 3 in the direction of the arrow as a reference signal acquisition direction, upon detection, signal acquisition unchanged third direction, when the direction of the arrow 2 shows the fault detector downward direction illustrate the direction of the ground point signal acquisition is in the opposite direction of arrow 3 ; when the fault detection

器2显示的箭头方向向上,说明接地点方向与信号采集器3箭头方向是相同方向。 2 the arrows show the direction of the upward, the direction of arrow 3 described grounding point direction is the same direction as the signal acquisition.

[0032] 系统中如果有两条支路的一极或两极连接在一起,形成闭环系统,称之为环路。 [0032] If the system has two branches of a bipolar electrode or joined together to form a closed loop system, known as a loop. through

常环路以以下几种形式出现: Often loops appear in the following forms:

[0033] 1.两条支路的正极和负极分别相连形成环路; [0034] 2.两条支路的正极或者负极中的一极相连形成环路; The positive electrode [0033] 1. The two branches are connected to form a loop and the negative electrode; a positive electrode or a negative electrode [0034] 2. The two branches of one electrode connected to form a loop;

[0035] 3.两条支路中一条支路的正极通过负载与另一条支路的负极相连形成环路。 [0035] The positive electrode 3. The two branches one branch is connected to a loop formed by the load and the negative electrode of the other branch. [0036] 如果现场条件允许,在检测时断开环路的连接压片,以提高检测效率,减少检测时间。 [0036] If the field conditions permit, the loop connection is disconnected during tableting detection to improve detection efficiency, reduction detection time. 不能断开环路或环路本身就是非正常的,这时信号发生器所发信号都会被环路把信号分流,造成在环路内都能检测到接地信号,导致找不到接地点的具体方向。 Loop or not disconnect itself is abnormal, then the signal will be the signal generator signal branch loop occurs, resulting in a ground loop can detect the signal, resulting in particular ground point can not be found direction. 可根据方向判断接地点。 The ground point can be determined direction.

[0037] 其方法如图6所示,支路1和支路2形成一条环路,而支路3是环路上的一条分支并有接地故障。 [0037] The methods shown in Figure 6, leg 1 and leg 2 forms a loop, and a branch leg 3 is on the ground loops and faults. 用故障检测器分别在A, B, C, D, E五个点检测,其箭头指的方向是故障检测器所检测的接地点方向,根据A, B, C, D, E点所检测接地点的箭头方向可知E点所在的支路是环路的分支,有接地故障并能故障定位。 A fault detector, respectively A, B, C, D, E five point detection, which refers to the direction of arrow ground fault location is detected by the detector direction, then in accordance with the detected A, B, C, D, E point Location of the direction of arrow E understood branch point where a branch loop, ground fault and to locate faults.

[0038] 在检测时,可以根据故障检测器接地灯是否亮来判断接地,同时也可以根据液晶上所显示波形来判断接地。 [0038] Upon detection, the ground may be determined based on whether a ground fault detector lights, but also the ground may be determined according to the waveform displayed on the LCD.

Claims (7)

  1. 直流系统接地故障定位装置,其特征在于:它包括连接于直流系统母线及地线的信号发生器(1)、夹持直流系统待检测线路的信号采集器(3)和连接信号采集器(3)的故障检测器(2)。 The system DC ground fault locating device, characterized in that: it comprises a system bus connected to the DC ground and a signal generator (1), clamping the signal acquisition system to be detected DC line (3) and the connection signal acquisition (3 ) failure detector (2).
  2. 2. 根据权利要求1所述的直流系统接地故障定位装置,其特征在于:所述信号发生器(1)包括信号发生单元(11)及信号收集单元(14),所述信号发生单元(11)输出端连接信号整形单元(12),信号整形单元(12)输出端连接信号输出单元(13),信号输出单元(13) 直流系统,所述信号收集单元(14)输入端与直流系统连接,其输出端连接信号分析单元(15),所述信号分析单元(15)输出端连接信号发生单元(11)。 The DC ground fault system positioning apparatus according to claim 1, wherein: the signal generator (1) comprises a signal generating unit (11) and a signal collection unit (14), said signal generating means (11 ) signal shaping means connected to the output terminal (12), (12) output of the signal shaping unit is connected to the signal output unit (13), the signal output unit (13) direct current system, a signal collecting unit (14) connected to the DC input system and an output terminal connected to the signal analyzing unit (15), (15) an output of the signal analyzing unit connected to the signal generating unit (11).
  3. 3. 根据权利要求2所述的直流系统接地故障定位装置,其特征在于:所述信号发生器(1) 设有液晶显示屏(16)、指示灯(17)及开关按钮(18),所述液晶显示屏(16)与信号分析单元(15)连接。 The system DC ground fault locating device according to claim 2, wherein: the signal generator (1) is provided with a liquid crystal display (16), the indicator (17) and a switch button (18), the said liquid crystal display (16) and a signal analyzing unit (15).
  4. 4. 根据权利要求1所述的直流系统接地故障定位装置,其特征在于:所述故障检测器(2) 包括信号采集单元(21),所述信号采集单元(21)输出端连接信号放大单元(22),信号放大单元(22)输出端连接滤波单元(23),滤波单元(23)输出端连接模数转换单元(24), 模数转换单元(24)连接信号处理单元(25),所述信号处理单元(25)输出端连接故障分析单元(26)。 The DC ground fault system positioning apparatus according to claim 1, wherein: said fault detector (2) comprises a signal collection unit (21), the signal acquisition unit (21) connected to the output terminal of the signal amplifying means (22), (22) output of the signal amplifying unit connected to the filter unit (23), (23) the output end of the filter unit is connected to analog-digital conversion unit (24), analog to digital conversion means (24) connected to a signal processing unit (25), (25) the output of the signal processing unit connected to the failure analysis unit (26).
  5. 5. 根据权利要求4所述的直流系统接地故障定位装置,其特征在于:所述故障检测器(2) 设有显示屏(27)、状态指示灯(28)及控制按钮(29),所述显示屏(27)与故障分析单元(26)连接。 The DC ground fault locating system of the apparatus as claimed in claim 4, wherein: said fault detector (2) is provided with a display screen (27), the status indicator (28) and control button (29), the said display (27) and fault analysis means (26).
  6. 6. 根据权利要求1所述的直流系统接地故障定位装置,其特征在于:所述信号采集器(3) 为钳表。 The DC ground fault system positioning apparatus according to claim 1, wherein: said signal acquisition device (3) is a clamp.
  7. 7. 根据权利要求6所述的直流系统接地故障定位装置,其特征在于:所述信号采集器(3)前端设有钳紧检测导线的沟头(31),沟头(31)后侧设有方向标示(32)、钳表开合按钮(33)及电源指示灯(34),信号采集器(3)后端设有输出端(35)。 The DC ground fault locating device system according to claim 6, wherein: said signal acquisition device (3) is provided with a front end head of the clincher groove of the detection wire (31), the first groove (31) disposed rear side directional marking (32), clamp opening and closing button (33) and a power indicator (34), the data acquisition device (3) provided with an output terminal of the rear end (35).
CN 200920049883 2009-01-09 2009-01-09 Device for locating ground fault of DC system CN201449433U (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101894218A (en) * 2010-07-22 2010-11-24 北京中恒博瑞数字电力科技有限公司;宁夏回族自治区电力公司 Method for quickly correcting designated node elements in node impedance matrix by multiple network operations
CN103487713A (en) * 2013-09-23 2014-01-01 国家电网公司 Multipoint earthing trouble shooting equipment for substation voltage transformer secondary circuit
CN103513161A (en) * 2013-09-27 2014-01-15 孙双春 Power transmission and transformation system fault searching locating instrument and searching method
CN103743990A (en) * 2013-12-26 2014-04-23 北京交控科技有限公司 Method for detecting fault of anti-surge device in train automatic control system
CN103995158A (en) * 2013-02-17 2014-08-20 上海安科瑞电气股份有限公司 Signal generator for fault locating of medical isolation power supply system
CN104237645A (en) * 2014-09-04 2014-12-24 上海慕安电气有限公司 Online monitoring system and method for insulation state of substation DC system
CN105510773A (en) * 2016-01-28 2016-04-20 广州优维电子科技有限公司 Earth fault detection device for direct current system
CN105699845A (en) * 2016-02-26 2016-06-22 方刚 Power cable line-to-ground/electricity series fault point searching instrument of electrical device

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101894218A (en) * 2010-07-22 2010-11-24 北京中恒博瑞数字电力科技有限公司;宁夏回族自治区电力公司 Method for quickly correcting designated node elements in node impedance matrix by multiple network operations
CN101894218B (en) 2010-07-22 2012-07-04 北京中恒博瑞数字电力科技有限公司 Method for quickly correcting designated node elements in node impedance matrix by multiple network operations
CN103995158B (en) * 2013-02-17 2016-10-05 安科瑞电气股份有限公司 A medical isolated power system fault location signal generator
CN103995158A (en) * 2013-02-17 2014-08-20 上海安科瑞电气股份有限公司 Signal generator for fault locating of medical isolation power supply system
CN103487713A (en) * 2013-09-23 2014-01-01 国家电网公司 Multipoint earthing trouble shooting equipment for substation voltage transformer secondary circuit
CN103513161A (en) * 2013-09-27 2014-01-15 孙双春 Power transmission and transformation system fault searching locating instrument and searching method
CN103513161B (en) * 2013-09-27 2017-07-14 中国石油化工股份有限公司 Transmission and distribution system to find the fault locator and search method
CN103743990B (en) * 2013-12-26 2016-04-20 北京交控科技股份有限公司 Surge fault detection method for a device in the automatic train control
CN103743990A (en) * 2013-12-26 2014-04-23 北京交控科技有限公司 Method for detecting fault of anti-surge device in train automatic control system
CN104237645A (en) * 2014-09-04 2014-12-24 上海慕安电气有限公司 Online monitoring system and method for insulation state of substation DC system
CN105510773A (en) * 2016-01-28 2016-04-20 广州优维电子科技有限公司 Earth fault detection device for direct current system
CN105699845A (en) * 2016-02-26 2016-06-22 方刚 Power cable line-to-ground/electricity series fault point searching instrument of electrical device

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