CN203224571U - A flexible grounding resistance tester - Google Patents
A flexible grounding resistance tester Download PDFInfo
- Publication number
- CN203224571U CN203224571U CN 201320116298 CN201320116298U CN203224571U CN 203224571 U CN203224571 U CN 203224571U CN 201320116298 CN201320116298 CN 201320116298 CN 201320116298 U CN201320116298 U CN 201320116298U CN 203224571 U CN203224571 U CN 203224571U
- Authority
- CN
- China
- Prior art keywords
- power supply
- flexible
- grounding resistance
- grounding
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
Description
技术领域 technical field
本实用新型涉及一种电阻测试仪，尤其涉及一种柔性接地电阻测试仪，属于智能变电站技术领域。 The utility model relates to a resistance tester, in particular to a flexible ground resistance tester, which belongs to the technical field of intelligent substations.
背景技术 Background technique
送电线路杆塔的接地电阻是衡量杆塔接地是否良好的标准，接地电阻小可降低反击跳闸率，提高杆塔的耐雷水平，对线路防雷具有重大现实意义。目前使用的数字式或手动接地摇表测量接地电阻时，需要从接地网向外引100米以上的测量线和两根辅助接地极，给试验工作带来诸多不便。 The grounding resistance of the transmission line tower is a standard to measure whether the grounding of the tower is good. The small grounding resistance can reduce the counter-attack tripping rate and improve the lightning resistance level of the tower, which has great practical significance for line lightning protection. When the digital or manual grounding meter used at present is used to measure grounding resistance, it is necessary to lead out more than 100 meters of measuring wire and two auxiliary grounding electrodes from the grounding network, which brings a lot of inconvenience to the test work.
在严寒的冬季测试接地电阻时，辅助接地极钉入和拔出大地的过程十分困难，另外还需将送电线路杆塔被测的接地极从接地系统中分离，同时受地形和地貌的限制，致使接地电阻测试工作的开展十分困难。 When testing the grounding resistance in the severe winter, it is very difficult to nail the auxiliary grounding electrode into and out of the ground. In addition, it is necessary to separate the grounding electrode of the power transmission line tower from the grounding system. At the same time, it is limited by the terrain and landform. As a result, it is very difficult to carry out the grounding resistance test.
发明内容 Contents of the invention
本实用新型针对上述现有技术中存在的问题，提供了一种柔性接地电阻测试仪，解决了现有技术在接地电阻测试时，需要将被测接地极从接地系统中分离，或需要外引测量线及辅助接地极的问题。 The utility model provides a flexible grounding resistance tester aiming at the problems existing in the above-mentioned prior art, which solves the need to separate the grounding electrode from the grounding system in the prior art when testing the grounding resistance in the prior art, or the need for an external lead Problems with measuring wires and auxiliary ground electrodes.
本实用新型的技术方案如下： The technical scheme of the utility model is as follows:
数据采样计算单元的输入端连接柔性电流线圈、变频电源和电池，数据采样计算单元的输出端连接显示屏和直流逆变电源；直流逆变电源的输入端连接电池，直流逆变电源的输出端连接变频电源。 The input end of the data sampling calculation unit is connected to the flexible current coil, variable frequency power supply and battery, the output end of the data sampling calculation unit is connected to the display screen and the DC inverter power supply; the input end of the DC inverter power supply is connected to the battery, and the output end of the DC inverter power supply Connect the variable frequency power supply.
所述的直流逆变电源，采用电池通过电路产生交流电源。 The DC inverter power supply uses a battery to generate an AC power supply through a circuit.
所述的数据采样计算单元，通过数字滤波及傅里叶变换技术测试试验频率 The data sampling calculation unit tests the test frequency through digital filtering and Fourier transform technology
下的电压及电流，并通过数学模型计算出被测装置的接地阻抗值。 Under the voltage and current, and through the mathematical model to calculate the grounding impedance value of the device under test.
所述的柔性电流线圈：利用安匝法原理通过对电力铁塔支撑脚的缠绕将微弱的变频或高频电流信号准确测试出来并输出。 Said flexible current coil: use the principle of ampere-turn method to accurately test and output weak frequency-variable or high-frequency current signals by winding the supporting feet of the power tower.
本实用新型的优点效果如下： The advantages and effects of the utility model are as follows:
1、仪器的抗干扰能力强； 1. The instrument has strong anti-interference ability;
2、测量范围广、分辨率高； 2. Wide measurement range and high resolution;
3、可满足电力铁塔支撑脚接地引下线的电流采样； 3. It can meet the current sampling of the grounding down-conductor of the supporting foot of the power tower;
4、测试接地电阻时不需要断开架空地线。 4. It is not necessary to disconnect the overhead ground wire when testing the ground resistance.
附图说明 Description of drawings
图1为本实用新型的结构示意框图。 Fig. 1 is a structural schematic block diagram of the utility model.
图2为本实用新型现场测试接线示意图。 Fig. 2 is a schematic diagram of field test wiring of the present invention.
图中，1、线路铁塔，2、柔性电流线圈，3、测试线，4、按键，5、显示屏。 In the figure, 1. Line iron tower, 2. Flexible current coil, 3. Test line, 4. Button, 5. Display screen.
具体实施方式 Detailed ways
参照附图，结合具体实施例，详细描述本实用新型如下。 Referring to the accompanying drawings, in conjunction with specific embodiments, the utility model is described in detail as follows.
实施例Example
数据采样计算单元的输入端连接柔性电流线圈、变频电源和电池，数据采样计算单元的输出端连接显示屏和直流逆变电源；直流逆变电源的输入端连接电池，直流逆变电源的输出端连接变频电源。 The input end of the data sampling calculation unit is connected to the flexible current coil, variable frequency power supply and battery, the output end of the data sampling calculation unit is connected to the display screen and the DC inverter power supply; the input end of the DC inverter power supply is connected to the battery, and the output end of the DC inverter power supply Connect the variable frequency power supply.
所述的直流逆变电源，采用电池通过电路产生较大功率的交流电源，满足 The DC inverter power supply uses a battery to generate a relatively high-power AC power supply through a circuit, which meets the requirements of
现场测试接地装置的接地阻抗要求，输出功率不小于50VA。 The grounding impedance requirements of the field test grounding device, the output power is not less than 50VA.
所述的数据采样计算单元，通过数字滤波及傅里叶变换技术测试试验频率 The data sampling calculation unit tests the test frequency through digital filtering and Fourier transform technology
下的电压及电流，并通过数学模型计算出被测装置的接地阻抗值。 Under the voltage and current, and through the mathematical model to calculate the grounding impedance value of the device under test.
所述的柔性电流线圈，每只长度5米，利用安匝法原理通过对电力铁塔支撑脚多达10圈的缠绕将微弱的变频或高频电流信号准确测试出来并传送至仪器主机计算；柔性电流线圈是依据罗氏线圈原理制作而成，包括罗氏线圈及积分器。 The flexible current coils, each with a length of 5 meters, use the principle of the ampere-turn method to accurately test the weak frequency conversion or high frequency current signals by winding up to 10 turns on the supporting feet of the power tower and transmit them to the host computer for calculation; flexible The current coil is made according to the principle of Rogowski coil, including Rogowski coil and integrator.
试验时，电力铁塔支撑脚缠绕柔性电流线圈，柔性电流线圈通过测试线连 During the test, the flexible current coil is wound around the support feet of the power tower, and the flexible current coil is connected to the test line through the test line.
接数据采样计算单元，数据采样计算单元的输出端连接显示屏。 The data sampling calculation unit is connected, and the output terminal of the data sampling calculation unit is connected to the display screen.
柔性接地电阻测试仪的性能如下。 The performance of the flexible ground resistance tester is as follows.
测试阻抗范围： 0.01Ω～1000Ω，分辨率0.05Ω。 Test impedance range: 0.01Ω～1000Ω, resolution 0.05Ω.
测试准确度： ±(5%+5计数)。 Test accuracy: ±(5%+5 counts).
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320116298 CN203224571U (en) | 2013-03-14 | 2013-03-14 | A flexible grounding resistance tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320116298 CN203224571U (en) | 2013-03-14 | 2013-03-14 | A flexible grounding resistance tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203224571U true CN203224571U (en) | 2013-10-02 |
Family
ID=49251573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320116298 Expired - Lifetime CN203224571U (en) | 2013-03-14 | 2013-03-14 | A flexible grounding resistance tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203224571U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197152A (en) * | 2013-03-14 | 2013-07-10 | 辽宁省电力有限公司抚顺供电公司 | Flexible earth resistance tester |
| CN105717364A (en) * | 2014-12-01 | 2016-06-29 | 国网辽宁省电力有限公司锦州供电公司 | Method for measuring power frequency grounding resistance of single ground wire iron pipe tower |
| CN105717365A (en) * | 2014-12-01 | 2016-06-29 | 国网辽宁省电力有限公司锦州供电公司 | Method for measuring power frequency grounding resistance of iron pipe tower with double ground wires |
-
2013
- 2013-03-14 CN CN 201320116298 patent/CN203224571U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197152A (en) * | 2013-03-14 | 2013-07-10 | 辽宁省电力有限公司抚顺供电公司 | Flexible earth resistance tester |
| CN105717364A (en) * | 2014-12-01 | 2016-06-29 | 国网辽宁省电力有限公司锦州供电公司 | Method for measuring power frequency grounding resistance of single ground wire iron pipe tower |
| CN105717365A (en) * | 2014-12-01 | 2016-06-29 | 国网辽宁省电力有限公司锦州供电公司 | Method for measuring power frequency grounding resistance of iron pipe tower with double ground wires |
| CN105717365B (en) * | 2014-12-01 | 2019-08-13 | 国网辽宁省电力有限公司锦州供电公司 | Measurement method of power frequency grounding resistance of iron pipe tower with double lightning protection lines |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2014173314A1 (en) | System for testing property of thunder and lightning traveling wave of power transmission line | |
| CN108919158B (en) | Field calibration method of non-contact measuring device for transient voltage in AC substation | |
| CN206583969U (en) | A socket-type single-phase power harmonic analyzer | |
| CN102928673A (en) | Method for acquiring impulse grounding resistance | |
| CN105891604A (en) | Loop impedance method of measuring power transmission support grounding impedance and testing system | |
| CN105929284A (en) | Wireless tester and testing method for live-line measuring zinc oxide arrester | |
| CN104297559A (en) | Device and method for measuring induced voltage | |
| CN201402293Y (en) | A distributed wireless high-voltage equipment insulation live test system | |
| CN203224571U (en) | A flexible grounding resistance tester | |
| CN106199202A (en) | A kind of line steel tower grounded screen Transient grounding resistance measuring instrument | |
| CN103018525B (en) | Transformer station's internal short-circuit distribution of current is carried out to the apparatus and method of synchro measure | |
| CN103197152A (en) | Flexible earth resistance tester | |
| CN203054091U (en) | Narrow-band carrier access impedance testing device for low-voltage power lines | |
| CN104111438A (en) | Primary large-current loop monitoring method in current transformer error test | |
| CN203178474U (en) | Intelligent electric-energy-meter fast transient pulse group test equipment | |
| CN203587679U (en) | Digital wireless fault current sensor on-line monitoring device | |
| CN204789763U (en) | Circuit iron tower ground net impulse grounding impedance measuring apparatu | |
| CN203025236U (en) | Device for synchronously measuring short circuit current distribution in transformer station | |
| CN104865427A (en) | Precise high-current transient current rise generating device | |
| CN205176158U (en) | Electric capacity type current transformer on -line measuring device | |
| CN204287327U (en) | A kind of ultra-high-tension power transmission line zero sequence impedance metering circuit | |
| CN204228830U (en) | A kind of pick-up unit for power distribution network ground capacity | |
| CN202886439U (en) | Photoelectric isolation type transformation-ratio-adjustable voltage display device | |
| CN203204048U (en) | Output voltage measurement circuit for high-voltage frequency converter | |
| CN203054063U (en) | Input voltage measuring circuit for high-voltage frequency converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131002 |
|
| CX01 | Expiry of patent term |