CN110824239A - Portable load current testing device and using method - Google Patents
Portable load current testing device and using method Download PDFInfo
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- CN110824239A CN110824239A CN201911195024.6A CN201911195024A CN110824239A CN 110824239 A CN110824239 A CN 110824239A CN 201911195024 A CN201911195024 A CN 201911195024A CN 110824239 A CN110824239 A CN 110824239A
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- 238000012360 testing method Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000009413 insulation Methods 0.000 claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims description 39
- 230000003750 conditioning effect Effects 0.000 claims description 30
- 238000004891 communication Methods 0.000 claims description 29
- 238000012545 processing Methods 0.000 claims description 19
- 230000001143 conditioned effect Effects 0.000 claims description 6
- 230000004044 response Effects 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 210000000080 chela (arthropods) Anatomy 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention relates to the technical field of electric power insulation detection, in particular to a portable load current testing device and a using method thereof. The invention has simple structure and convenient use, can detect whether the tested equipment has insulation hidden trouble or not under the condition of no power failure compared with the prior art, increases the efficiency of insulation reduction detection and ensures the stability and quality of power supply.
Description
Technical Field
The invention relates to the technical field of electric insulation detection, in particular to a portable load current testing device and a using method thereof.
Background
Due to the aging of electric energy transmission equipment, the aging of transformer equipment, the dirt of electronic components, the rusting of line interfaces and the like, the reduction of the insulation level, the increase of the leakage of porcelain sleeves and the increase of the line loss caused by the increase of the resistance of line interfaces are caused. How to effectively reduce the line loss is one of important work of long-term research of power grid enterprises, and an important measure for reducing the line loss is to find and eliminate fault hidden trouble points. At present, the main searching method for the insulation descending of the distribution network line mainly comprises the steps of sectionalized power failure of the line, gradual power trial transmission or fault hidden danger elimination by using a megger after sectionalized power failure. The power failure time is long, and the power supply quality and the economic benefit are seriously influenced.
Disclosure of Invention
The invention provides a portable load current testing device and a using method thereof, overcomes the defects of the prior art, and can effectively solve the problem of long-time power failure easily caused by the conventional mode of checking potential insulation reduction points of a distribution network line by using a megger after sectional power failure.
One of the technical schemes of the invention is realized by the following measures: a portable load current testing device comprises a current detection unit and a display processing unit, wherein the current detection unit can detect the current values of a power supply side and a power transmission side of a tested device, the display processing unit can judge whether the insulation of the tested device is reduced, the current detection unit comprises a first shell, a current acquisition module and a first communication module are arranged in the first shell, a current clamp head capable of clamping a power supply side circuit and a power transmission side circuit of the tested device is arranged at the top of the first shell, an insulating rod connector is arranged at the bottom of the first shell, an insulating rod is arranged on the insulating rod connector, the current acquisition module is respectively connected with the current clamp head and the first communication module, and the first communication module is connected with the display processing unit; the current tong head comprises an arc-shaped tong seat with an upward opening, a first tong plate and a second tong plate, the arc-shaped tong seat is fixedly installed at the top of the first shell, the first tong plate and the second tong plate are respectively installed on two end parts of the arc-shaped tong seat, the front pushing surface of the first tong plate is intersected with the front pushing surface of the second tong plate, and the rear pulling surface of the first tong plate is intersected with the rear pulling surface of the second tong plate.
The following is further optimization or/and improvement of the technical scheme of the invention:
the current acquisition module can comprise a first conditioning circuit, a second conditioning circuit, a first control module, a storage module and a first power supply, the current clamp head is connected with the first conditioning circuit and the second conditioning circuit respectively, the first conditioning circuit and the second conditioning circuit are both connected with the first control module, the first control module is connected with the storage module and the first communication module respectively, and the first power supply is connected with the first control module.
The display processing unit can comprise a second shell, a display module is arranged on the second shell, a second communication module, a second control module and a second power supply are arranged in the second shell, the first communication module is connected with the second communication module, the second communication module is connected with the second control module, the second control module is connected with the display module, and the power supply is connected with the second control module.
The second housing may be provided with a first power key and a HOLD key, and both the first power key and the HOLD key are connected to the second control module.
The first housing may be provided with a second power key for controlling whether the first power is turned on and a power indicator lamp for controlling whether the first power is turned on.
The second technical scheme of the invention is realized by the following measures: a method of using a portable load current testing device, comprising the steps of:
the current clamp head respectively clamps a power supply side circuit and a power transmission side circuit of the tested device;
the current acquisition module acquires a corresponding power supply side current value and a corresponding power transmission side current value of the tested equipment;
the display processing unit makes a difference between the current value of the power supply side and the current value of the power transmission side of the device to be tested, and compares the difference value with a set threshold value;
and judging whether the insulation of the tested equipment is reduced or not according to the comparison result, and judging that the tested equipment has insulation hidden danger in response to the difference value being larger than a set threshold value.
The following is further optimization or/and improvement of the technical scheme of the invention:
the current acquisition module acquires the current value of the power supply side and the current value of the power transmission side of the device to be tested, and can comprise:
the current clamp head respectively acquires a power supply side current signal and a power transmission side current signal of the tested equipment;
the current signal of the power supply side and the current signal of the power transmission side of the tested equipment are conditioned through a first conditioning circuit and a second conditioning circuit;
and the first control module calculates the real part and the imaginary part of the conditioned current signal through a fast Fourier transform algorithm to obtain the current value of the power supply side and the current value of the power transmission side of the device to be tested.
The invention has simple structure and convenient use, can detect whether the equipment to be detected has insulation hidden trouble or not under the condition of no power failure compared with the prior art, increases the efficiency of insulation reduction detection, and simultaneously can not influence the stability and the quality of power supply.
Drawings
Fig. 1 is a schematic circuit diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic front view of a current detection unit in embodiment 1 of the present invention.
Fig. 3 is a schematic front view of a display processing unit in embodiment 1 of the present invention.
FIG. 4 is a flow chart of example 2 of the present invention.
Fig. 5 is a flowchart of acquiring a current value by the current acquisition module in embodiment 2 of the present invention.
The codes in the figures are respectively: 1 is first casing, 2 is the insulator spindle connector, 3 is the second casing, 4 are display module, 5 are first power key, 6 are the HOLD key, 7 are arc pincers seats, 8 are first nipper, 9 are the second nipper, 10 are the preceding face that pushes away, 11 are the back face that draws, 12 are second power key, 13 are power indicator.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.
In the present invention, for convenience of description, the description of the relative positional relationship of the components is described according to the layout pattern of fig. 2 in the specification, such as: the positional relationship of front, rear, upper, lower, left, right, etc. is determined in accordance with the layout direction of the drawings of the specification.
The invention is further described with reference to the following examples and figures:
example 1: as shown in fig. 1, 2 and 3, the portable load current testing device comprises a current detection unit capable of detecting the current values of the power supply side and the power transmission side of the device to be tested and a display processing unit capable of judging whether the insulation of the device to be tested is reduced, wherein the current detection unit comprises a first shell 1, a current acquisition module and a first communication module are arranged in the first shell 1, a current clamp head capable of clamping the power supply side circuit and the power transmission side circuit of the device to be tested is arranged at the top of the first shell 1, an insulating rod connector 2 is arranged at the bottom of the first shell 1, an insulating rod is arranged on the insulating rod connector 2, the current acquisition module is respectively connected with the current clamp head and the first communication module, and the first communication module is connected with the display processing unit; the current binding clip comprises an arc-shaped binding clip 7 with an upward opening, a first binding clip 8 and a second binding clip 9, wherein the arc-shaped binding clip 7 is fixedly installed at the top of the first shell 1, the first binding clip 8 and the second binding clip 9 are respectively installed on two end parts of the arc-shaped binding clip 7, a front pushing surface 10 of the first binding clip 8 is intersected with a front pushing surface 10 of the second binding clip 9, and a rear pulling surface 11 of the first binding clip 8 is intersected with a rear pulling surface 11 of the second binding clip 9.
The current detection unit comprises a first shell 1, a current tong head, a current acquisition module, a first communication module and an insulating rod; the current clamp head is the prior known technology and is used for clamping a power supply side circuit and a power transmission side circuit of the tested equipment respectively and collecting current information; the current acquisition module is used for acquiring and conditioning current values of a power supply side and a power transmission side of the tested equipment; the first communication module is a prior known technology, and can be an RF wireless module used for sending the current signal to the display processing unit; the insulating rod is well known in the art and may be comprised of a plurality of links. The display processing unit is used for receiving and displaying the current values of the power supply side and the power transmission side of the tested device, and meanwhile, the current values of the two sides are subjected to difference, so that whether the insulation is lowered or not is judged according to the difference value.
When the device is used, a worker holds an insulating rod of the current detection unit, the intersection of the front push face 10 of the first nipper 8 and the front push face 10 of the second nipper 9 is aligned with a power supply side circuit or a power transmission side circuit of a device to be detected and pushed upwards, the power supply side circuit or the power transmission side circuit of the device to be detected is located in the arc-shaped nipper base 7, the current nipper heads clamp the power supply side circuit and the power transmission side circuit of the device to be detected respectively, the current acquisition module acquires the current values of the power supply side and the power transmission side of the device to be detected, the current values of the power supply side and the power transmission side of the device to be detected are sent to the display processing unit through the first communication module, the display processing unit makes a difference between the current values of the two sides, the difference value is compared with a set threshold value.
The invention has simple structure and convenient use, can detect whether the equipment to be detected has insulation hidden trouble or not under the condition of no power failure compared with the prior art, increases the efficiency of insulation reduction detection, and simultaneously can not influence the stability and the quality of power supply.
The portable load current testing device can be further optimized or/and improved according to actual needs:
as shown in fig. 1, the current collection module includes a first conditioning circuit, a second conditioning circuit, a first control module, a storage module, and a first power supply, the current clamp is connected to the first conditioning circuit and the second conditioning circuit, the first conditioning circuit and the second conditioning circuit are both connected to the first control module, the first control module is connected to the storage module and the first communication module, and the first power supply is connected to the first control module.
The first conditioning circuit is a conventional technology, and may include a 22HZ band-pass filter and an AD converter to perform rectification and analog-to-digital conversion on the current signal; the second conditioning circuit is well known in the art and may include a 22HZ band pass filter and an AD converter to perform rectification and analog-to-digital conversion of the current signal. The first control module is a known prior art, and the model of the first control module can be STC89C54RD +, and the first control module is used for calculating the real part and the imaginary part of the current signal conditioned by the first conditioning circuit and the second conditioning circuit through a fast fourier transform algorithm to obtain a specific current value. The storage module is a conventional memory, and may be a micro memory for storing the current value calculated by the first control module.
As shown in fig. 1 and 3, the display processing unit includes a second housing 3, a display module 4 is disposed on the second housing 3, a second communication module, a second control module and a second power supply are disposed in the second housing 3, the first communication module is connected to the second communication module, the second communication module is connected to the second control module, the second control module is connected to the display module 4, and the power supply is connected to the second control module.
The second communication module is a conventional communication module, and may be an RF wireless module. The second control module is a conventional technology, and can be an ARM11 controller, and is used for making a difference between current values of a power supply side and a power transmission side of the device to be tested, so as to judge whether insulation is reduced or not according to the difference; the display module 4 is used for displaying the current values of the power supply side and the power transmission side of the device to be tested and the difference value of the two current values.
As shown in fig. 1 and 3, a first power key 5 and a HOLD key 6 are provided on the second housing 3, and both the first power key 5 and the HOLD key 6 are connected to a second control module.
As shown in fig. 1 and 2, a second power key 12 for controlling whether the first power is turned on and a power indicator 13 for controlling whether the first power is turned on are provided on the first housing 1.
Example 2: as shown in fig. 4, the use method of the portable load current testing device comprises the following steps:
s1, the current clamp head clamps the power supply side circuit and the power transmission side circuit of the tested device respectively;
s2, the current acquisition module acquires the corresponding current value of the power supply side and the current value of the power transmission side of the tested device;
s3, the display processing unit makes a difference between the current value of the power supply side and the current value of the power transmission side of the device to be tested, and compares the difference value with a set threshold value;
and S4, judging whether the insulation of the tested device is reduced or not according to the comparison result, and judging that the tested device has insulation hidden trouble in response to the difference value being larger than a set threshold value.
The portable load current testing device can be further optimized or/and improved according to actual needs:
as shown in fig. 5, the current collecting module obtains a power supply side current value and a power transmission side current value of the device under test, and includes:
s21, respectively acquiring a power supply side current signal and a power transmission side current signal of the tested equipment by the current clamp head;
s22, conditioning the current signal of the power supply side and the current signal of the power transmission side of the device to be tested through the first conditioning circuit and the second conditioning circuit;
and S23, the first control module calculates the real part and the imaginary part of the conditioned current signal through a fast Fourier transform algorithm to obtain the current value of the power supply side and the current value of the power transmission side of the device to be tested.
The above technical features constitute the best embodiment of the present invention, which has strong adaptability and best implementation effect, and unnecessary technical features can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (8)
1. A portable load current testing device is characterized by comprising a current detection unit and a display processing unit, wherein the current detection unit can detect the current values of a power supply side and a power transmission side of a tested device, the display processing unit can judge whether insulation of the tested device is reduced, the current detection unit comprises a first shell, a current acquisition module and a first communication module are arranged in the first shell, a current clamp head capable of clamping a power supply side circuit and a power transmission side circuit of the tested device is arranged at the top of the first shell, an insulating rod connector is arranged at the bottom of the first shell, an insulating rod is arranged on the insulating rod connector, the current acquisition module is respectively connected with the current clamp head and the first communication module, and the first communication module is connected with the display processing unit; the current tong head comprises an arc-shaped tong seat with an upward opening, a first tong plate and a second tong plate, the arc-shaped tong seat is fixedly installed at the top of the first shell, the first tong plate and the second tong plate are respectively installed on two end parts of the arc-shaped tong seat, the front pushing surface of the first tong plate is intersected with the front pushing surface of the second tong plate, and the rear pulling surface of the first tong plate is intersected with the rear pulling surface of the second tong plate.
2. The portable load current testing device of claim 1, wherein the current collection module comprises a first conditioning circuit, a second conditioning circuit, a first control module, a storage module, and a first power supply, the current clamp is connected to the first conditioning circuit and the second conditioning circuit, the first conditioning circuit and the second conditioning circuit are both connected to the first control module, the first control module is connected to the storage module and the first communication module, and the first power supply is connected to the first control module.
3. The portable load current testing device of claim 1 or 2, wherein the display processing unit comprises a second housing, a display module is disposed on the second housing, a second communication module, a second control module and a second power supply are disposed in the second housing, the first communication module is connected to the second communication module, the second communication module is connected to the second control module, the second control module is connected to the display module, and the power supply is connected to the second control module.
4. The portable load current testing device of claim 3, wherein a first power key and a HOLD key are provided on said second housing, said first power key and HOLD key being connected to said second control module.
5. The portable load current testing device according to claim 1, 2 or 4, wherein a second power key for controlling whether the first power is turned on and a power indicator for controlling whether the first power is turned on are provided on the first housing.
6. The portable load current testing device of claim 3, wherein a second power key for controlling whether the first power is turned on and a power indicator for controlling whether the first power is turned on are provided on the first housing.
7. Use of a portable load current testing device according to any of claims 1 to 6, characterized in that it comprises the following steps:
the current clamp head respectively clamps a power supply side circuit and a power transmission side circuit of the tested device;
the current acquisition module acquires a corresponding power supply side current value and a corresponding power transmission side current value of the tested equipment;
the display processing unit makes a difference between the current value of the power supply side and the current value of the power transmission side of the device to be tested, and compares the difference value with a set threshold value;
and judging whether the insulation of the tested equipment is reduced or not according to the comparison result, and judging that the tested equipment has insulation hidden danger in response to the difference value being larger than a set threshold value.
8. The method for using the portable load current testing device according to claim 7, wherein the current collecting module obtains the current value of the power supply side and the current value of the power transmission side of the device under test, and comprises:
the current clamp head respectively acquires a power supply side current signal and a power transmission side current signal of the tested equipment;
the current signal of the power supply side and the current signal of the power transmission side of the tested equipment are conditioned through a first conditioning circuit and a second conditioning circuit;
and the first control module calculates the real part and the imaginary part of the conditioned current signal through a fast Fourier transform algorithm to obtain the current value of the power supply side and the current value of the power transmission side of the device to be tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911195024.6A CN110824239A (en) | 2019-11-28 | 2019-11-28 | Portable load current testing device and using method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911195024.6A CN110824239A (en) | 2019-11-28 | 2019-11-28 | Portable load current testing device and using method |
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| CN110824239A true CN110824239A (en) | 2020-02-21 |
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| CN201911195024.6A Pending CN110824239A (en) | 2019-11-28 | 2019-11-28 | Portable load current testing device and using method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203232128U (en) * | 2013-01-29 | 2013-10-09 | 国家电网公司 | Portable device for cable joint local discharging detection |
| KR20140033682A (en) * | 2012-09-10 | 2014-03-19 | 한국전력공사 | Faulty polymer composite insulator detection device at live line |
| CN203630087U (en) * | 2013-11-01 | 2014-06-04 | 中原特钢股份有限公司 | Portable multifunctional magnetic powder detection tongs |
| CN204188757U (en) * | 2014-09-30 | 2015-03-04 | 广东电网有限责任公司茂名供电局 | Portable power equipment leakage point insulating pick-up unit |
| CN209264898U (en) * | 2018-11-19 | 2019-08-16 | 中铁电气化局集团有限公司 | Portable contact net route insulation tester |
-
2019
- 2019-11-28 CN CN201911195024.6A patent/CN110824239A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20140033682A (en) * | 2012-09-10 | 2014-03-19 | 한국전력공사 | Faulty polymer composite insulator detection device at live line |
| CN203232128U (en) * | 2013-01-29 | 2013-10-09 | 国家电网公司 | Portable device for cable joint local discharging detection |
| CN203630087U (en) * | 2013-11-01 | 2014-06-04 | 中原特钢股份有限公司 | Portable multifunctional magnetic powder detection tongs |
| CN204188757U (en) * | 2014-09-30 | 2015-03-04 | 广东电网有限责任公司茂名供电局 | Portable power equipment leakage point insulating pick-up unit |
| CN209264898U (en) * | 2018-11-19 | 2019-08-16 | 中铁电气化局集团有限公司 | Portable contact net route insulation tester |
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Application publication date: 20200221 |