CN211718504U - Alternating-current and direct-current function calibrator for insulation monitoring device - Google Patents

Alternating-current and direct-current function calibrator for insulation monitoring device Download PDF

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CN211718504U
CN211718504U CN201922236710.5U CN201922236710U CN211718504U CN 211718504 U CN211718504 U CN 211718504U CN 201922236710 U CN201922236710 U CN 201922236710U CN 211718504 U CN211718504 U CN 211718504U
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conversion unit
monitoring device
insulation monitoring
output
unit
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陈坤
钟著辉
梁渊然
李应武
王蕾
李鹏
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State Grid Corp of China SGCC
State Grid Hunan Electric Power Co Ltd
Changde Power Supply Co of State Grid Hunan Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Hunan Electric Power Co Ltd
Changde Power Supply Co of State Grid Hunan Electric Power Co Ltd
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Abstract

本实用新型公开了一种绝缘监察装置交窜直功能校验仪,包括交流变换单元、直流转换单元、开关量输入/输出单元、中央控制单元、人机交互单元、对地电阻输出电路以及电容输出回路,对地电阻输出电路包括多条并联布置的纯电阻支路,中央控制单元连接有用于A/D转换单元。本实用新型可用于完成对变电站绝缘监察装置交窜直测记功能、设定动作门槛值以及故障响应时间的校验,集可变交流电源、可变直流电源于一身,测试接线简单,便于携带,亦可作为单独可变电源使用,填补了目前无专用设备校验绝缘监察装置功能的空白,有助于现场可靠、高效、方便完成绝缘监察装置功能的校验工作。

Figure 201922236710

The utility model discloses an AC-DC function calibrator for an insulation monitoring device, which comprises an AC conversion unit, a DC conversion unit, a switch input/output unit, a central control unit, a human-computer interaction unit, a ground resistance output circuit and a capacitor The output circuit, the resistance-to-ground output circuit includes a plurality of pure resistance branches arranged in parallel, and the central control unit is connected with an A/D conversion unit. The utility model can be used to complete the verification of the functions of alternating and direct measuring and recording, setting the action threshold value and the fault response time of the insulation monitoring device of the substation. , and can also be used as a separate variable power supply, filling the gap that there is no special equipment to verify the function of the insulation monitoring device, and it is helpful to complete the verification of the function of the insulation monitoring device on-site reliably, efficiently and conveniently.

Figure 201922236710

Description

一种绝缘监察装置交窜直功能校验仪A calibrator for cross-straightening function of insulation monitoring device

技术领域technical field

本实用新型涉及校验变电站绝缘监察装置的校验技术,具体涉及一种绝缘监察装置交窜直功能校验仪。The utility model relates to a calibration technology for calibrating an insulation monitoring device of a substation, in particular to a calibrator for the alternating and straightening function of an insulation monitoring device.

背景技术Background technique

目前国内各直流厂家生产的绝缘监察装置功能良莠不齐,多数均不能实时监测出直流两极同时接地、交流窜入直流等故障。在现场实际中,也缺乏专用的校验绝缘监察装置功能的合格仪器。为保证变电站挂网运行的绝缘监察装置功能合格、可靠,亟需研制一种专用的绝缘监察装置校验仪器。At present, the functions of insulation monitoring devices produced by various domestic DC manufacturers are mixed, and most of them cannot detect faults such as simultaneous grounding of DC poles and AC jumping into DC in real time. In the field practice, there is also a lack of special qualified instruments for verifying the function of the insulation monitoring device. In order to ensure the qualified and reliable function of the insulation monitoring device of the substation connected to the grid, it is urgent to develop a special calibration instrument for the insulation monitoring device.

实用新型内容Utility model content

本实用新型要解决的技术问题:针对现有技术的上述问题,提供一种绝缘监察装置交窜直功能校验仪,本实用新型可用于完成对变电站绝缘监察装置交窜直测记功能、设定动作门槛值以及故障响应时间的校验,集可变交流电源、可变直流电源于一身,测试接线简单,便于携带,亦可作为单独可变电源使用,填补了目前无专用设备校验绝缘监察装置功能的空白,有助于现场可靠、高效、方便完成绝缘监察装置功能的校验工作。The technical problem to be solved by the present utility model: aiming at the above-mentioned problems of the prior art, a calibrator for the alternating and directing function of the insulation monitoring device is provided, and the utility model can be used to complete the function of measuring the alternating directing and directing of the insulation monitoring device of the substation, setting The calibration of the fixed action threshold value and fault response time integrates the variable AC power supply and the variable DC power supply. The test wiring is simple and easy to carry. It can also be used as a separate variable power supply, which fills up the need for calibration insulation without special equipment at present. The blank of the monitoring device function is helpful to complete the verification work of the insulation monitoring device function reliably, efficiently and conveniently on site.

为了解决上述技术问题,本实用新型采用的技术方案为:In order to solve the above-mentioned technical problems, the technical scheme adopted by the present utility model is:

一种绝缘监察装置交窜直功能校验仪,包括交流变换单元、直流转换单元、开关量输入/输出单元、中央控制单元、人机交互单元、至少一条对地电阻输出电路以及至少一条电容输出回路,所述交流变换单元、直流转换单元均具有供电输出端,所述直流转换单元的控制端、开关量输入/输出单元以及人机交互单元分别与中央控制单元相连,所述对地电阻输出电路包括多条并联布置的纯电阻支路,所述中央控制单元连接有用于A/D转换单元,所述A/D转换单元的输入端与交流变换单元的输出端相连。An AC/DC function calibrator for an insulation monitoring device, comprising an AC conversion unit, a DC conversion unit, a switch input/output unit, a central control unit, a human-computer interaction unit, at least one resistance output circuit to ground and at least one capacitance output The AC conversion unit and the DC conversion unit all have power supply output terminals, the control terminal of the DC conversion unit, the switch input/output unit and the human-computer interaction unit are respectively connected to the central control unit, and the ground resistance output The circuit includes a plurality of pure resistance branches arranged in parallel, the central control unit is connected with an A/D conversion unit, and the input end of the A/D conversion unit is connected with the output end of the AC conversion unit.

可选地,所述交流变换单元包括串接的调压器和隔离变压器。Optionally, the AC conversion unit includes a series-connected voltage regulator and an isolation transformer.

可选地,所述直流转换单元包括串接的整流模块和直流分压模块,所述整流模块的控制端和中央控制单元相连。Optionally, the DC conversion unit includes a rectifier module and a DC voltage divider module connected in series, and a control end of the rectifier module is connected to the central control unit.

可选地,所述直流分压模块包括串联布置的分压电阻R2和可调电位器R。Optionally, the DC voltage dividing module includes a voltage dividing resistor R 2 and an adjustable potentiometer R arranged in series.

可选地,所述直流转换单元的输入端并联有稳压电容C1和保险FU串联构成的保护支路。Optionally, the input end of the DC conversion unit is connected in parallel with a protection branch formed by a voltage stabilizing capacitor C1 and a fuse FU in series.

可选地,所述直流转换单元的输出端并联有稳压电容C2Optionally, a voltage stabilizing capacitor C 2 is connected in parallel with the output end of the DC conversion unit.

可选地,所述对地电阻输出电路的各条纯电阻支路上串接有电阻以及选择开关。Optionally, each pure resistance branch of the resistance-to-ground output circuit is connected in series with a resistance and a selection switch.

可选地,所述电容输出回路包括串联布置的限流电阻和电容,且限流电阻和电容之间的中间节点连接有切换开关,且所述切换开关具有三个可选切换位#1~#3,可选切换位#1为断开的中间位置,可选切换位#2为通过旁路回路将限流电阻旁路的位置,可选切换位#3为通过串连一放电电阻的旁路回路将电容旁路的位置,所述限流电阻和放电电阻的阻值大小相同。Optionally, the capacitor output loop includes a current-limiting resistor and a capacitor arranged in series, and a switch is connected to an intermediate node between the current-limiting resistor and the capacitor, and the switch has three selectable switching bits #1~ #3, optional switching bit #1 is the middle position of disconnection, optional switching bit #2 is the position where the current limiting resistor is bypassed through the bypass loop, and optional switching bit #3 is the position where a discharge resistor is connected in series Where the bypass loop bypasses the capacitor, the resistance values of the current limiting resistor and the discharge resistor are the same.

和现有技术相比,本实用新型具有下述优点:Compared with the prior art, the utility model has the following advantages:

1、本实用新型包括交流变换单元、A/D转换单元、中央控制单元、开关量输入/输出单元、人机交互单元和直流转换单元,通过交流变换单元和直流转换单元可以实现所需交流或直流电压的输出,通过绝缘监察装置的交窜直故障模拟、交窜直动作门槛值校验通过交流变换单元来实现,直流转换单元可用于为绝缘监察装置提供直流电源以及校验绝缘监察装置对直流系统电压的在线监测等功能,因此能够实现绝缘监察装置交窜直功能校验。1. The utility model includes an AC conversion unit, an A/D conversion unit, a central control unit, a switch input/output unit, a human-computer interaction unit and a DC conversion unit. The output of the DC voltage is realized through the AC-DC fault simulation of the insulation monitoring device, and the threshold value verification of the AC-DC action is realized by the AC conversion unit. It has functions such as online monitoring of the voltage of the DC system, so it can realize the verification of the AC and DC function of the insulation monitoring device.

2、本实用新型通过交流变换单元和直流转换单元可以实现所需交流或直流电压的输出,集可变交流电源、可变直流电源于一身,测试接线简单,便于携带,亦可作为单独可变电源使用。2. The utility model can realize the output of the required AC or DC voltage through the AC conversion unit and the DC conversion unit, integrates the variable AC power supply and the variable DC power supply, the test wiring is simple, easy to carry, and can also be used as a separate variable power usage.

3、本实用新型填补了目前无专用设备校验绝缘监察装置功能的空白,有助于现场可靠、高效、方便完成绝缘监察装置功能的校验工作。3. The utility model fills in the blank of the current absence of special equipment for verifying the function of the insulation monitoring device, and helps to complete the verification of the function of the insulation monitoring device reliably, efficiently and conveniently on site.

图例说明:1、交流变换单元;11、调压器;12、隔离变压器;2、直流转换单元;21、整流模块;22、直流分压模块;3、开关量输入/输出单元;4、中央控制单元;41、A/D转换单元;5、人机交互单元;6、对地电阻输出电路;7、电容输出回路;71、限流电阻;72、电容;73、切换开关;74、放电电阻。Legend: 1. AC conversion unit; 11. Voltage regulator; 12. Isolation transformer; 2. DC conversion unit; 21. Rectifier module; 22. DC voltage divider module; 3. Switch input/output unit; 4. Central control unit; 41, A/D conversion unit; 5, human-computer interaction unit; 6, ground resistance output circuit; 7, capacitor output circuit; 71, current limiting resistor; 72, capacitor; 73, switch; 74, discharge resistance.

附图说明Description of drawings

图1为本实用新型实施例的校验仪结构示意图。FIG. 1 is a schematic structural diagram of a calibrator according to an embodiment of the present invention.

图2为本实用新型实施例中直流转换单元的结构示意图。FIG. 2 is a schematic structural diagram of a DC conversion unit in an embodiment of the present invention.

图3为本实用新型实施例中直流输出支路的电路原理示意图。FIG. 3 is a schematic diagram of the circuit principle of the DC output branch in the embodiment of the present invention.

图4为本实用新型实施例中对地电阻输出电路的电路原理示意图。FIG. 4 is a schematic diagram of the circuit principle of the ground resistance output circuit in the embodiment of the present invention.

图5为本实用新型实施例中电容输出回路的电路原理示意图。FIG. 5 is a schematic diagram of the circuit principle of the capacitor output loop in the embodiment of the present invention.

图6为本实用新型实施例中交流串入直流负极试验的连接电路原理图。FIG. 6 is a schematic diagram of the connection circuit of the AC series connected to the DC negative electrode test in the embodiment of the present utility model.

图7为本实用新型实施例中交流串入直流正极试验的连接电路原理图。FIG. 7 is a schematic diagram of a connection circuit for an AC series-to-DC positive test in an embodiment of the present utility model.

具体实施方式Detailed ways

如图1所示,本实施例绝缘监察装置交窜直功能校验仪包括交流变换单元1、直流转换单元2、开关量输入/输出单元3、中央控制单元4、人机交互单元5、至少一条对地电阻输出电路6以及至少一条电容输出回路7,交流变换单元1、直流转换单元2均具有供电输出端,直流转换单元2的控制端、开关量输入/输出单元3以及人机交互单元5分别与中央控制单元4相连,对地电阻输出电路6包括多条并联布置的纯电阻支路,中央控制单元4连接有用于A/D转换单元41,A/D转换单元41的输入端与交流变换单元1的输出端相连。如图2所示,交流变换单元1、直流转换单元6由一路交流220V市电作为供能输入,交流变换单元1输出范围为0~500V连续可调(分辨率0.1V)的交流电压,直流转换单元6输出范围为20~500V连续可调(分辨率0.1V)的直流电压,通过绝缘监察装置的交窜直故障模拟、交窜直动作门槛值校验通过交流变换单元1来实现。As shown in FIG. 1 , the AC-DC function calibrator of the insulation monitoring device in this embodiment includes an AC conversion unit 1, a DC conversion unit 2, a switch input/output unit 3, a central control unit 4, a human-computer interaction unit 5, at least One earth resistance output circuit 6 and at least one capacitor output circuit 7, the AC conversion unit 1 and the DC conversion unit 2 all have power supply output terminals, the control terminal of the DC conversion unit 2, the switch input/output unit 3 and the human-computer interaction unit 5 are respectively connected with the central control unit 4, the ground resistance output circuit 6 includes a plurality of pure resistance branches arranged in parallel, the central control unit 4 is connected with the A/D conversion unit 41, and the input end of the A/D conversion unit 41 is connected to the A/D conversion unit 41. The output terminals of the AC conversion unit 1 are connected. As shown in Figure 2, the AC conversion unit 1 and the DC conversion unit 6 are powered by one AC 220V mains power supply, and the AC conversion unit 1 outputs an AC voltage with a continuously adjustable range of 0-500V (resolution 0.1V), DC The conversion unit 6 outputs a DC voltage with a continuously adjustable range of 20-500V (resolution 0.1V), which is realized by the AC conversion unit 1 through the AC-DC fault simulation of the insulation monitoring device and the AC-DC action threshold verification.

如图1所示,交流变换单元1包括串接的调压器11和隔离变压器12,通过调压器11和隔离变压器12对外接交流市电进行变换、隔离,提高了本实施例绝缘监察装置交窜直功能校验仪的抗干扰能力,同时也可独立输出可调的交流电源。As shown in FIG. 1, the AC conversion unit 1 includes a voltage regulator 11 and an isolation transformer 12 connected in series, and the external AC mains power is converted and isolated through the voltage regulator 11 and the isolation transformer 12, which improves the insulation monitoring device of this embodiment. The anti-interference ability of the AC channel and DC function calibrator can also be independently output adjustable AC power.

直流转换单元2主要用于为绝缘监察装置提供直流电源以及校验绝缘监察装置对直流系统电压的在线监测等功能。如图2所示,直流转换单元2包括串接的整流模块21和直流分压模块22,整流模块21的控制端和中央控制单元4相连,通过整流模块21可实现AC-DC转换,并通过直流分压模块22可以实现输出直流电压的可控调节。The DC conversion unit 2 is mainly used for providing DC power supply for the insulation monitoring device and verifying the online monitoring of the DC system voltage by the insulation monitoring device. As shown in FIG. 2 , the DC conversion unit 2 includes a rectifier module 21 and a DC voltage divider module 22 connected in series. The control end of the rectifier module 21 is connected to the central control unit 4 , and AC-DC conversion can be realized through the rectifier module 21 , and through The DC voltage dividing module 22 can realize controllable regulation of the output DC voltage.

如图3所示,直直流分压模块22包括串联布置的分压电阻R2和可调电位器R,可调电位器R的调节控制端与中央控制单元4相连,可实现直流转换单元6输出范围为20~500V连续可调(分辨率0.1V)的直流电压。As shown in FIG. 3 , the DC-DC voltage divider module 22 includes a voltage-dividing resistor R 2 and an adjustable potentiometer R arranged in series, and the adjustment control end of the adjustable potentiometer R is connected to the central control unit 4 to realize the DC conversion unit 6 The output range is 20-500V continuously adjustable (resolution 0.1V) DC voltage.

如图3所示,直流转换单元2的输入端并联有稳压电容C1和保险FU串联构成的保护支路,直流转换单元2的输出端并联有稳压电容C2As shown in FIG. 3 , the input terminal of the DC conversion unit 2 is connected in parallel with a protection branch formed by a voltage-stabilizing capacitor C 1 and a fuse FU in series, and the output terminal of the DC conversion unit 2 is connected in parallel with a voltage-stabilizing capacitor C 2 .

开关量输入/输出单元3用于接收中央控制单元4输出的逻辑指令,生成导通或关断内部逻辑接点信号。通过开关量输入/输出单元3可用于实现故障场景模拟。The switch input/output unit 3 is used to receive the logic command output by the central control unit 4, and generate a signal to turn on or turn off the internal logic contact. The digital input/output unit 3 can be used to simulate failure scenarios.

中央控制单元4基于单片机实现,是本实施例绝缘监察装置交窜直功能校验仪的核心模块,可实现A/D转换单元41、开关量输入/输出单元3、人机交互单元5的控制,接收人机交互单元5处理输入的信号,控制输出直流转换单元2的输出直流电压、开关量输入/输出单元3的内部逻辑接点等;此外,调压器11还可以根据需要与中央控制单元4相连以通过中央控制单元4自动控制调压器11输出可调的交流电压。The central control unit 4 is implemented based on a single chip microcomputer, and is the core module of the calibrator for the cross-connection function of the insulation monitoring device in this embodiment, which can realize the control of the A/D conversion unit 41 , the switch input/output unit 3 and the human-computer interaction unit 5 , receives the input signal processed by the human-computer interaction unit 5, and controls the output DC voltage of the output DC conversion unit 2, the internal logic contacts of the switch input/output unit 3, etc.; in addition, the voltage regulator 11 can also be required. 4 is connected to automatically control the voltage regulator 11 through the central control unit 4 to output an adjustable AC voltage.

A/D转换单元41连接有安装在交流变换单元1的输出端的电压电流互感器,用于将变换后的电压采样信号进行模数转换生成中央控制单元4能够识别的数字信号。The A/D conversion unit 41 is connected to a voltage and current transformer installed at the output end of the AC conversion unit 1 , and is used to perform analog-to-digital conversion on the converted voltage sampling signal to generate a digital signal that can be recognized by the central control unit 4 .

本实施例中,人机交互单元5采用高分辨率触摸屏,以中央控制单元4作为核心处理元件,实现校验装置电压量和开关量的输出。在人机交互单元5的人机界面中引入多种复选框作为输入,可灵活勾选多种复杂组合功能以完成所需的输出模式。人机交互单元5的人机界面还包括用户使用提示,在进行绝缘监察装置功能测试时,液晶界面上会出现相应提示说明,指引完成相关测试过程。In this embodiment, the human-computer interaction unit 5 adopts a high-resolution touch screen, and the central control unit 4 is used as the core processing element to realize the output of the voltage quantity and the switch quantity of the verification device. A variety of check boxes are introduced into the human-machine interface of the human-computer interaction unit 5 as input, and a variety of complex combination functions can be flexibly checked to complete the required output mode. The man-machine interface of the man-machine interaction unit 5 also includes a user prompt. When performing the function test of the insulation monitoring device, corresponding prompt instructions will appear on the liquid crystal interface to guide the completion of the relevant test process.

如图4所示,对地电阻输出电路6的各条纯电阻支路上串接有电阻以及选择开关。参见图4,本实施例中各条纯电阻支路上串接的电阻分别为5kΩ、10kΩ、20kΩ、30kΩ、50kΩ、100kΩ,且各条纯电阻支路两端设计两个输出端子,方便扩展输出接线。As shown in FIG. 4 , each pure resistance branch of the ground resistance output circuit 6 is connected with a resistance and a selection switch in series. Referring to FIG. 4 , in this embodiment, the resistors connected in series on each pure resistance branch are 5kΩ, 10kΩ, 20kΩ, 30kΩ, 50kΩ, 100kΩ, and two output terminals are designed at both ends of each pure resistance branch to facilitate the expansion of the output wiring.

如图5所示,电容输出回路7包括串联布置的限流电阻71和电容72,且限流电阻71和电容72之间的中间节点连接有切换开关73,且切换开关73具有三个可选切换位#1~#3,可选切换位#1为断开的中间位置,可选切换位#2为通过旁路回路将限流电阻71旁路的位置,可选切换位#3为通过串连一放电电阻74的旁路回路将电容72旁路的位置,限流电阻71和放电电阻74的阻值大小相同。当电容输出回路7不使用时,切换开关73从可选切换位#1接可选切换位#3,通过放电电阻74放电保证电容72的储能电量为0;当准备接入试验平台时,切换开关73处于中间位置可选切换位#1,限流电阻71投入试验回路,保证接线瞬间无火花;接线完成后,切换开关73从可选切换位#1接可选切换位#32,旁路掉限流电阻71,保证试验回路只有电容存在。本实施例绝缘监察装置交窜直功能校验仪的电容输出回路7的系统电容输出功能的使用方法如下:1、把切换开关73从可选切换位#3(切换开关状态试验平台面板丝印有指示)转化到可选切换位#1;2、接入绝缘监察装置,电容输出回路7的电容输出端子两端分别绝缘监察装置的母线和试验地;3、完成接线后把切换开关73从可选切换位#1转化到可选切换位#2的方式,进行试验;4、完成试验后,解除试验接线,然后把切换开关73从可选切换位#2转化到可选切换位#3,电容72放电,整理试验数据,完成试验。As shown in FIG. 5 , the capacitor output loop 7 includes a current-limiting resistor 71 and a capacitor 72 arranged in series, and a switch 73 is connected to the intermediate node between the current-limiting resistor 71 and the capacitor 72 , and the switch 73 has three optional Switching bits #1~#3, the optional switching bit #1 is the middle position of disconnection, the optional switching bit #2 is the position where the current limiting resistor 71 is bypassed through the bypass circuit, and the optional switching bit #3 is the pass-through At the position where the capacitor 72 is bypassed by a bypass loop connected in series with a discharge resistor 74 , the resistance values of the current limiting resistor 71 and the discharge resistor 74 are the same. When the capacitor output circuit 7 is not in use, the switch 73 is connected from the optional switch position #1 to the optional switch position #3, and the discharge resistance 74 discharges to ensure that the energy storage capacity of the capacitor 72 is 0; when it is ready to be connected to the test platform, The switch 73 is in the middle position, and the switch position #1 is optional, and the current limiting resistor 71 is put into the test circuit to ensure that there is no spark in the wiring moment; Turn off the current limiting resistor 71 to ensure that only the capacitor exists in the test loop. The method of using the system capacitance output function of the capacitance output loop 7 of the insulation monitoring device AC function calibrator in this embodiment is as follows: 1. Change the switch 73 from the optional switch position #3 (the switch state test platform panel has a silk screen printed on it). 2. Connect the insulation monitoring device, and the two ends of the capacitor output terminal of the capacitor output circuit 7 are respectively insulated from the bus bar and the test ground of the monitoring device; 3. After the wiring is completed, switch the switch 73 from the available 4. After the test is completed, remove the test wiring, and then switch the switch 73 from the optional switching position #2 to the optional switching position #3, The capacitor 72 is discharged, the test data is sorted, and the test is completed.

本实施例绝缘监察装置交窜直功能校验仪的交流变换单元1通过交流输出端子接入绝缘监察装置,给绝缘监察装置通入交流电,调节交流变换单元1的交流电压输出,合上输出控制空开输出端子就有相应调节的交流电压输出。The AC conversion unit 1 of the insulation monitoring device in this embodiment is connected to the insulation monitoring device through the AC output terminal, the AC power is supplied to the insulation monitoring device, the AC voltage output of the AC conversion unit 1 is adjusted, and the output control is turned on. The output terminal of the open circuit has a correspondingly adjusted AC voltage output.

此外,本实施例提供一种前述的绝缘监察装置交窜直功能校验仪的应用方法,包括交流窜入直流负极试验的步骤,详细步骤包括:In addition, the present embodiment provides an application method of the aforementioned insulation monitoring device AC-straightening function calibrator, including the steps of AC channeling into the DC negative electrode test, and the detailed steps include:

A1)将切换开关73从可选切换位#3切换到可选切换位#2,在交流变换单元1、直流转换单元2无输出的情况下,在被测绝缘监察装置的正极+KM、负极-KM之间串接待测试验继电器J和输出开关,将直流转换单元2的输出端分别连接到被测绝缘监察装置的正极+KM、负极-KM,通过对地电阻输出电路6的两条纯电阻支路串联后并联在绝缘监察装置的正极+KM、负极-KM之间以分别模拟正极平衡电阻阻值R+和负极平衡桥电阻阻值R-,将交流变换单元1的输出端与负极平衡桥电阻阻值R-并联,将电容输出回路7一端连接在待测试验继电器J和输出开关之间的中间节点、另一端连接在正极平衡电阻阻值R+和负极平衡桥电阻阻值R-之间接地的中间节点,如图6所示;A1) Switch the switch 73 from the optional switch bit #3 to the optional switch bit #2. When the AC conversion unit 1 and the DC conversion unit 2 have no output, the positive + KM and negative electrodes of the insulation monitoring device under test The test relay J and the output switch are connected in series between -KM, and the output terminals of the DC conversion unit 2 are respectively connected to the positive +KM and negative -KM of the insulation monitoring device to be tested, and the two pure wires of the output circuit 6 are output through the resistance to ground. The resistance branches are connected in series and in parallel between the positive pole +KM and negative pole -KM of the insulation monitoring device to simulate the positive balance resistance R+ and the negative balance bridge resistance R- respectively, and balance the output end of the AC conversion unit 1 with the negative pole The resistance value of the bridge resistance R- is connected in parallel, and one end of the capacitor output loop 7 is connected to the intermediate node between the test relay J to be tested and the output switch, and the other end is connected between the positive balance resistance resistance R+ and the negative balance bridge resistance resistance R- Indirect intermediate nodes, as shown in Figure 6;

A2)将切换开关73从可选切换位#3切换到可选切换位#1;A2) Toggle switch 73 from optional toggle bit #3 to optional toggle bit #1;

A3)控制交流变换单元1、直流转换单元2开始输出电压,合上输出开关;记录待测试验继电器J的动作试验数据,如果动作试验数据满足要求则判定当前交流电压下的动作试验校验通过,否则判定当前交流电压下的动作试验校验不通过;A3) Control the AC conversion unit 1 and the DC conversion unit 2 to start outputting voltage, and close the output switch; record the action test data of the relay J to be tested, and if the action test data meets the requirements, it is determined that the action test verification under the current AC voltage has passed , otherwise it is judged that the action test verification under the current AC voltage fails;

A4)断开输出开关,判断是否已经满足测试次数要求,如果满足测试次数要求则跳转执行下一步;否则,调节交流变换单元1的输出交流电压,跳转执行步骤A3);A4) Turn off the output switch, judge whether the test times requirement has been met, and skip to the next step if the test times requirement is met; otherwise, adjust the output AC voltage of the AC conversion unit 1, and skip to step A3);

A5)判断被测绝缘监察装置是否需要更换待测试验继电器J,如果需要更换待测试验继电器J,则更换待测试验继电器J,跳转执行步骤A1);否则,结束并退出。A5) Determine whether the tested insulation monitoring device needs to replace the test relay J to be tested, if it is necessary to replace the test relay J to be tested, replace the test relay J to be tested, and skip to step A1); otherwise, end and exit.

本实施例还包括交流窜入直流负极试验的步骤,详细步骤包括:The present embodiment also includes the steps of alternating current entering the direct current negative electrode test, and the detailed steps include:

B1)将切换开关73从可选切换位#3切换到可选切换位#2,在交流变换单元1、直流转换单元2无输出的情况下,在被测绝缘监察装置的正极+KM、负极-KM之间串接待测试验继电器J和输出开关,将直流转换单元2的输出端分别连接到被测绝缘监察装置的正极+KM、负极-KM,通过对地电阻输出电路6的两条纯电阻支路串联后并联在绝缘监察装置的正极+KM、负极-KM之间以分别模拟正极平衡电阻阻值R+和负极平衡桥电阻阻值R-,将交流变换单元1的输出端与正极平衡电阻阻值R+并联,将电容输出回路7一端连接在待测试验继电器J和输出开关之间的中间节点、另一端连接在正极平衡电阻阻值R+和负极平衡桥电阻阻值R-之间接地的中间节点,如图6所示;B1) Switch the switch 73 from the optional switching bit #3 to the optional switching bit #2. When the AC conversion unit 1 and the DC conversion unit 2 have no output, the positive +KM and negative electrodes of the insulation monitoring device under test are The test relay J and the output switch are connected in series between -KM, and the output terminals of the DC conversion unit 2 are respectively connected to the positive +KM and negative -KM of the insulation monitoring device to be tested, and the two pure wires of the output circuit 6 are output through the resistance to ground. The resistance branches are connected in series and in parallel between the positive pole +KM and negative pole -KM of the insulation monitoring device to simulate the positive balance resistance R+ and the negative balance bridge resistance R- respectively, and balance the output end of the AC conversion unit 1 with the positive pole The resistance value R+ is connected in parallel, and one end of the capacitor output circuit 7 is connected to the intermediate node between the relay J to be tested and the output switch, and the other end is connected to the ground between the positive balance resistance R+ and the negative balance bridge resistance R- The intermediate node of , as shown in Figure 6;

B2)将切换开关73从可选切换位#3切换到可选切换位#1;B2) Toggle switch 73 from optional toggle bit #3 to optional toggle bit #1;

B3)控制交流变换单元1、直流转换单元2开始输出电压,合上输出开关;记录待测试验继电器J的动作试验数据,如果动作试验数据满足要求则判定当前交流电压下的动作试验校验通过,否则判定当前交流电压下的动作试验校验不通过;B3) Control the AC conversion unit 1 and the DC conversion unit 2 to start outputting voltage, and close the output switch; record the action test data of the relay J to be tested, and if the action test data meets the requirements, it is determined that the action test under the current AC voltage has passed the verification , otherwise it is judged that the action test verification under the current AC voltage fails;

B4)断开输出开关,判断是否已经满足测试次数要求,如果满足测试次数要求则跳转执行下一步;否则,调节交流变换单元1的输出交流电压,跳转执行步骤B3);B4) Turn off the output switch, judge whether the test times requirement has been met, and skip to the next step if the test times requirement is met; otherwise, adjust the output AC voltage of the AC conversion unit 1, and skip to step B3);

B5)判断被测绝缘监察装置是否需要更换待测试验继电器J,如果需要更换待测试验继电器J,则更换待测试验继电器J,跳转执行步骤B1);否则,结束并退出。B5) Determine whether the tested insulation monitoring device needs to replace the test relay J to be tested, if it is necessary to replace the test relay J to be tested, replace the test relay J to be tested, and skip to step B1); otherwise, end and exit.

此外,本实施例绝缘监察装置交窜直功能校验仪还可以用于对被测绝缘监察装置进行直流检验的功能,通过对被测绝缘监察装置的供电,判断被测绝缘监察装置的直流电极之间的电压差是否满足要求。In addition, the AC-DC function calibrator of the insulation monitoring device in this embodiment can also be used for the DC test function of the insulation monitoring device under test, and judge the DC electrode of the insulation monitoring device under test by supplying power to the insulation monitoring device under test. Whether the voltage difference between them meets the requirements.

此外,本实施例绝缘监察装置交窜直功能校验仪还可以用于对被测绝缘监察装置进行交窜直故障响应时间校验,交窜直故障响应时间校验的步骤包括:将被测绝缘监察装置脱网;如图6所示,将被测绝缘监察装置的正极+KM、负极-KM 和绝缘监察装置交窜直功能校验仪中的交流变换单元1的供电输出端相连;将被测绝缘监察装置的开关量输入/输出模块和绝缘监察装置交窜直功能校验仪中的开关量输入/输出单元3相连;控制交流变换单元1输出测试用的交流电压,并通过开关量输入/输出单元3接收被测绝缘监察装置的开关量输入/输出模块输出的导通信号获得交窜直故障响应时间,如果交窜直故障响应时间满足要求则判定校验通过。被测绝缘监察装置的通过接收外部电源信号关闭或导通内部逻辑接点方式实现开关量输出,从而可以实现上述交窜直故障响应时间校验的功能,当外部有电源信号输入时,光耦开出,使接点闭合。In addition, the AC-DC function calibrator of the insulation monitoring device in this embodiment can also be used to verify the AC-DC fault response time of the insulation monitoring device under test. The steps of verifying the AC-DC fault response time include: The insulation monitoring device is disconnected from the grid; as shown in Figure 6, connect the positive +KM, negative -KM of the insulation monitoring device to be tested and the power supply output terminal of the AC conversion unit 1 in the AC-DC function calibrator of the insulation monitoring device; connect the The switch input/output module of the insulation monitoring device under test is connected with the switch input/output unit 3 in the AC-DC function calibrator of the insulation monitoring device; the AC conversion unit 1 is controlled to output the AC voltage for testing, and pass the switch The input/output unit 3 receives the conduction signal output by the digital input/output module of the insulation monitoring device under test to obtain the AC/DC fault response time. If the AC/DC fault response time meets the requirements, it is determined that the verification is passed. The insulation monitoring device under test realizes the switch output by receiving the external power signal to turn off or turn on the internal logic contact, so as to realize the above-mentioned AC/DC fault response time verification function. When there is an external power signal input, the optocoupler will out to close the contacts.

此外,本实施例绝缘监察装置交窜直功能校验仪还可以用于对被测绝缘监察装置进行绝缘降低告警功能校验,将被测绝缘监察装置脱网;将被测绝缘监察装置的正极+KM、负极-KM 和绝缘监察装置交窜直功能校验仪中的交流变换单元1的供电输出端通过切换开关相连,绝缘监察装置交窜直功能校验仪中的A/D转换单元41的采集端子分别采集被测绝缘监察装置的正母、负母极间输入电阻以及正负母对地电容值,如果正母、负母极间输入电阻以及正负母对地电容值和预设范围匹配则判定校验通过。In addition, the cross-connection function calibrator of the insulation monitoring device of this embodiment can also be used to verify the insulation reduction alarm function of the insulation monitoring device under test, disconnect the insulation monitoring device under test from the grid; connect the positive pole of the insulation monitoring device under test +KM, negative pole -KM and the power supply output end of the AC conversion unit 1 in the calibrator of the insulation monitoring device are connected through a switch, and the A/D conversion unit 41 in the calibrator of the insulation monitoring device is connected to the calibrator. The acquisition terminal collects the input resistance between the positive bus and the negative bus and the positive and negative bus-to-ground capacitance values of the insulation monitoring device under test respectively. If the range matches, it is judged that the verification is passed.

此外,本实施例绝缘监察装置交窜直功能校验仪还可以用于对被测绝缘监察装置进行故障测记、录波等功能校验。通过外部输入不同故障场景来检验绝缘监察装置的故障记录、纪录刷新等机制。采用校验装置多次试验,校验绝缘监察装置是否能准确记录每一次的故障场景以及循环刷新机制是否正确(即校验绝缘监察装置在故障记录达到上限时,是否遵循优先覆盖最早历史记录的规则)通过控制输入不同的模拟量来检查绝缘监察装置的录波功能,包括直流电源的实时监测、直流电源纹波系数、故障暂态量的瞬时记录等。In addition, the cross-connection function calibrator of the insulation monitoring device in this embodiment can also be used to perform functional verification such as fault recording and wave recording on the insulation monitoring device under test. Through the external input of different fault scenarios, the fault record, record refresh and other mechanisms of the insulation monitoring device are tested. Use the calibration device for multiple tests to verify whether the insulation monitoring device can accurately record each fault scene and whether the cyclic refresh mechanism is correct (that is, verify whether the insulation monitoring device follows the priority of overwriting the earliest historical record when the fault record reaches the upper limit). Rules) Check the wave recording function of the insulation monitoring device by controlling the input of different analog quantities, including the real-time monitoring of the DC power supply, the ripple coefficient of the DC power supply, and the instantaneous recording of the fault transients.

以上所述仅是本实用新型的优选实施方式,本实用新型的保护范围并不仅局限于上述实施例,凡属于本实用新型思路下的技术方案均属于本实用新型的保护范围。应当指出,对于本技术领域的普通技术人员来说,在不脱离本实用新型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实用新型的保护范围。The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions under the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims (8)

1.一种绝缘监察装置交窜直功能校验仪,其特征在于,包括交流变换单元(1)、直流转换单元(2)、开关量输入/输出单元(3)、中央控制单元(4)、人机交互单元(5)、至少一条对地电阻输出电路(6)以及至少一条电容输出回路(7),所述交流变换单元(1)、直流转换单元(2)均具有供电输出端,所述直流转换单元(2)的控制端、开关量输入/输出单元(3)以及人机交互单元(5)分别与中央控制单元(4)相连,所述对地电阻输出电路(6)包括多条并联布置的纯电阻支路,所述中央控制单元(4)连接有用于A/D转换单元(41),所述A/D转换单元(41)的输入端与交流变换单元(1)的输出端相连。1. A calibrator for the AC/DC function of an insulation monitoring device, characterized in that it includes an AC conversion unit (1), a DC conversion unit (2), a switch input/output unit (3), and a central control unit (4) , a human-computer interaction unit (5), at least one ground resistance output circuit (6) and at least one capacitance output circuit (7), the AC conversion unit (1) and the DC conversion unit (2) both have power supply output terminals, The control terminal of the DC conversion unit (2), the switch input/output unit (3) and the human-computer interaction unit (5) are respectively connected with the central control unit (4), and the ground resistance output circuit (6) includes A plurality of pure resistance branches arranged in parallel, the central control unit (4) is connected with an A/D conversion unit (41), the input end of the A/D conversion unit (41) and the AC conversion unit (1) connected to the output. 2.根据权利要求1所述的绝缘监察装置交窜直功能校验仪,其特征在于,所述交流变换单元(1)包括串接的调压器(11)和隔离变压器(12)。2 . The AC-straightening function calibrator of an insulation monitoring device according to claim 1 , wherein the AC conversion unit ( 1 ) comprises a series-connected voltage regulator ( 11 ) and an isolation transformer ( 12 ). 3 . 3.根据权利要求1所述的绝缘监察装置交窜直功能校验仪,其特征在于,所述直流转换单元(2)包括串接的整流模块(21)和直流分压模块(22),所述整流模块(21)的控制端和中央控制单元(4)相连。3. The AC/DC function calibrator of an insulation monitoring device according to claim 1, wherein the DC conversion unit (2) comprises a series-connected rectifier module (21) and a DC voltage divider module (22), The control end of the rectifier module (21) is connected to the central control unit (4). 4.根据权利要求3所述的绝缘监察装置交窜直功能校验仪,其特征在于,所述直流分压模块(22)包括串联布置的分压电阻R2和可调电位器R。4 . The AC/DC function calibrator of an insulation monitoring device according to claim 3 , wherein the DC voltage dividing module ( 22 ) comprises a voltage dividing resistor R 2 and an adjustable potentiometer R arranged in series. 5 . 5.根据权利要求3所述的绝缘监察装置交窜直功能校验仪,其特征在于,所述直流转换单元(2)的输入端并联有稳压电容C1和保险FU串联构成的保护支路。5 . The AC/DC function calibrator of an insulation monitoring device according to claim 3 , wherein the input end of the DC conversion unit ( 2 ) is connected in parallel with a protection branch formed by a voltage-stabilizing capacitor C 1 and an insurance FU in series. 6 . road. 6.根据权利要求3所述的绝缘监察装置交窜直功能校验仪,其特征在于,所述直流转换单元(2)的输出端并联有稳压电容C26 . The AC/DC function calibrator of an insulation monitoring device according to claim 3 , wherein a voltage-stabilizing capacitor C 2 is connected in parallel with the output end of the DC conversion unit ( 2 ). 7 . 7.根据权利要求1所述的绝缘监察装置交窜直功能校验仪,其特征在于,所述对地电阻输出电路(6)的各条纯电阻支路上串接有电阻以及选择开关。7 . The AC/DC function calibrator of an insulation monitoring device according to claim 1 , wherein a resistor and a selection switch are connected in series to each pure resistance branch of the ground resistance output circuit ( 6 ). 8 . 8.根据权利要求1所述的绝缘监察装置交窜直功能校验仪,其特征在于,所述电容输出回路(7)包括串联布置的限流电阻(71)和电容(72),且限流电阻(71)和电容(72)之间的中间节点连接有切换开关(73),且所述切换开关(73)具有三个可选切换位#1~#3,可选切换位#1为断开的中间位置,可选切换位#2为通过旁路回路将限流电阻(71)旁路的位置,可选切换位#3为通过串连一放电电阻(74)的旁路回路将电容(72)旁路的位置,所述限流电阻(71)和放电电阻(74)的阻值大小相同。8 . The calibrator for the AC and DC function of an insulation monitoring device according to claim 1 , wherein the capacitor output loop ( 7 ) comprises a current limiting resistor ( 71 ) and a capacitor ( 72 ) that are arranged in series, and the limiting A switch (73) is connected to the intermediate node between the flow resistor (71) and the capacitor (72), and the switch (73) has three optional switch bits #1 to #3, and the optional switch bit #1 It is the middle position of disconnection, the optional switching bit #2 is the position where the current limiting resistor (71) is bypassed through the bypass loop, and the optional switching bit #3 is the bypass loop by connecting a discharge resistor (74) in series Where the capacitor (72) is bypassed, the resistance values of the current limiting resistor (71) and the discharge resistor (74) are the same.
CN201922236710.5U 2019-12-13 2019-12-13 Alternating-current and direct-current function calibrator for insulation monitoring device Active CN211718504U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110794354A (en) * 2019-12-13 2020-02-14 国网湖南省电力有限公司 Alternating current-to-direct current function calibrator for insulation monitoring device and application method thereof
CN113267658A (en) * 2021-07-19 2021-08-17 广东电网有限责任公司惠州供电局 Alternating current channeling fault simulation verification circuit, device and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110794354A (en) * 2019-12-13 2020-02-14 国网湖南省电力有限公司 Alternating current-to-direct current function calibrator for insulation monitoring device and application method thereof
CN110794354B (en) * 2019-12-13 2024-11-01 国网湖南省电力有限公司 Insulation monitoring device cross-over direct function calibrator and application method thereof
CN113267658A (en) * 2021-07-19 2021-08-17 广东电网有限责任公司惠州供电局 Alternating current channeling fault simulation verification circuit, device and method

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