CN111856216A - Device and method for testing defects of high-voltage cable cross-connection metal sheath in electrified manner - Google Patents
Device and method for testing defects of high-voltage cable cross-connection metal sheath in electrified manner Download PDFInfo
- Publication number
- CN111856216A CN111856216A CN202010847627.6A CN202010847627A CN111856216A CN 111856216 A CN111856216 A CN 111856216A CN 202010847627 A CN202010847627 A CN 202010847627A CN 111856216 A CN111856216 A CN 111856216A
- Authority
- CN
- China
- Prior art keywords
- direct current
- voltage
- power supply
- metal sheath
- testing
- 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.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 55
- 239000002184 metal Substances 0.000 title claims abstract description 55
- 230000007547 defect Effects 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000203 mixture Substances 0.000 claims 1
- 239000002994 raw material Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Images
Classifications
-
- 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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a device and a method for testing defects of a high-voltage cable cross-connection metal sheath in an electrified manner.
Description
Technical Field
The invention relates to a device and a method for testing the defects of a high-voltage cable cross-connection metal sheath in an electrified manner, and belongs to the technical field of power transmission and transformation equipment.
Background
The metal sheath of the three-phase cross interconnection section of the high-voltage cable has electrical connection defects, and the metal suspension discharge in the cable aluminum sheath or cable accessories is easily caused to cause cable faults. Because the cable metal sheath is long in length and connected with the accessory tail pipe, the joint and the grounding box copper bar, the electrical connection is complex. The traditional detection method can only carry out testing when the line is out of service, needs line out of service, has poor time efficiency and has limitation.
Disclosure of Invention
The invention provides a device and a method for testing the defects of a high-voltage cable cross-connection metal sheath in an electrified manner, which solve the problems disclosed in the background technology.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a high-voltage cable cross-connection metal sheath defect live-line testing device comprises a direct-current power supply circuit, a direct-current voltage measuring device and a direct-current testing device;
two ends of the direct current power supply circuit are respectively externally connected with any two-phase connecting bar of a group of cable protection grounding sides of the cross interconnection section, and direct current is applied to the metal sheaths connected with the connecting bars;
the direct current voltage measuring device measures the voltage between two connected rows connected with the direct current power supply circuit;
the direct current testing device measures the current on the two sides of the row connected with the direct current power supply circuit.
The direct current testing device comprises a direct current sensor and first direct current measuring equipment connected with the direct current sensor, the direct current sensor is detachably arranged on one side of the connecting row, and currents on two sides of the connecting row are measured by adjusting the position of the direct current sensor.
The direct current power supply circuit comprises a direct current power supply and second direct current measuring equipment which are connected in series, the direct current voltage measuring device is connected with the direct current power supply circuit in parallel, and two ends of the parallel connection are connected with the connecting bar in an external mode through current limiting equipment.
The direct current power supply is a storage battery power supply or a constant current source with the output current ripple coefficient not more than 0.1%.
The current limiting device is a metal coil or a resistor.
The precision of the direct current voltage measuring device is not lower than 0.2 level, the precision of the first direct current measuring device is not lower than 0.2 level, and the precision of the second direct current measuring device is not lower than 0.5 level.
A method for testing the defect of the cross-connected metal sheath of high-voltage cable by electrification comprises,
traversing every two combination modes of all three-phase connecting rows of the cross interconnection section, applying direct current to the metal sheaths connected with the two-phase connecting rows of each combination mode through a direct current supply circuit, measuring the voltage between the two-phase connecting rows of each combination mode through a direct current voltage measuring device, and measuring the current on two sides of the connecting row connected with the direct current supply circuit under each combination mode through a direct current testing device;
constructing a voltage equation between all two phase connecting rows according to Hough and ohm's law, and calculating the resistance of each metal sheath of the cross interconnection section;
and responding to the metal sheath resistance larger than the threshold value, and judging the corresponding metal sheath connection defect.
The method comprises the steps that a response direct current voltage measuring device is connected with a direct current power supply circuit formed by a direct current power supply and second direct current measuring equipment which are connected in series in parallel, two ends of the direct current power supply circuit are connected with a connecting bar in an external mode through current limiting equipment, the direct current voltage measuring device measures the sum of voltage between two connecting bars and voltage of the two current limiting equipment, the voltage between the two connecting bars is calculated according to the direct current power supply circuit current measured by the second direct current measuring equipment and resistance of the two current limiting equipment, and then a voltage equation of the voltage between the two connecting bars is constructed.
The threshold is 10 Ω.
The invention achieves the following beneficial effects: the invention applies direct current to the two-phase connecting rows at the protective grounding side of a group of cables at the cross interconnection section by using the direct current power supply, measures the voltage between the two-phase connecting rows by using the direct current voltage measuring device, measures the current at the two sides of the connecting rows by using the direct current testing device, thereby obtaining the resistance of each metal sheath at the cross interconnection section, judging whether the metal sheath of the cable is connected with the defect according to the resistance value, and being capable of carrying out testing under the charged state of a high-voltage cable line.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is a schematic diagram of a high voltage cable line cross-connect grounding system;
FIG. 3 is an equivalent circuit diagram of a high voltage cable grounding cross-connect system;
FIG. 4 is a schematic diagram of voltage and current in an equivalent circuit diagram;
FIG. 5 is a schematic diagram of the equations constructed.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
A device for testing the defects of a high-voltage cable cross-connection metal sheath in an electrified way comprises a direct-current power supply circuit, a direct-current voltage measuring device and a direct-current testing device.
Two ends of the direct current power supply circuit are respectively externally connected with any two-phase connecting bar of a group of cable protection grounding sides of the cross interconnection section, and direct current is applied to the metal sheaths connected with the connecting bars; the direct current voltage measuring device measures the voltage between two connected rows connected with the direct current power supply circuit; the direct current testing device measures the current on the two sides of the row connected with the direct current power supply circuit.
The specific structure of the device is shown in fig. 1, and comprises a direct current power supply circuit, a direct current voltage measuring device, a direct current testing device, two current limiting devices and two wire clamps.
The direct current power supply circuit comprises a direct current power supply and second direct current measuring equipment which are connected in series (the series sequence of the direct current power supply and the second direct current measuring equipment can be random), the direct current voltage measuring device is connected with the direct current power supply circuit in parallel, in order to limit the influence of metal sheath induced voltage on testing equipment (namely the direct current voltage measuring device and the direct current measuring equipment), two ends which are connected in parallel are externally connected with a connecting bar through current limiting equipment, the current limiting equipment is a metal coil or a resistor, the resistance value is not less than 10 omega, and the two current limiting equipment are specifically connected with the connecting bar through two wire clamps. At this time, the dc voltage measuring device measures the sum of the voltage between the two connecting lines and the voltage of the two current limiting devices, so before calculating the resistance value of the metal sheath, the voltage between the two connecting lines needs to be calculated according to the dc power supply circuit current measured by the second dc measuring device and the resistance of the two current limiting devices.
The direct current testing device comprises a direct current sensor and first direct current measuring equipment connected with the direct current sensor, the direct current sensor is detachably arranged on one side of the connecting row, and currents on two sides of the connecting row are measured by adjusting the position of the direct current sensor. If the connection row is connected with the A1 phase metal sheath and the B2 phase metal sheath, the direct current sensor is detachably arranged on the A1 phase metal sheath and can measure the current of the A1 phase metal sheath, and the direct current sensor is detachably arranged on the B2 phase metal sheath and can measure the current of the B2 phase metal sheath.
The direct current power supply is a storage battery power supply or a constant current source with an output current ripple coefficient not more than 0.1%; the precision of the direct current voltage measuring device is not lower than 0.2 level, the precision of the first direct current measuring device is not lower than 0.2 level, and the precision of the second direct current measuring device is not lower than 0.5 level.
The method of the device for testing the defects of the high-voltage cable cross-connection metal sheath in an electrified manner comprises the following steps:
step 1, traversing every two combination modes of three-phase connecting rows of all cross interconnection sections, applying direct current to metal sheaths connected with the two-phase connecting rows of each combination mode through a direct current supply circuit, measuring voltage between the two-phase connecting rows of each combination mode through a direct current voltage measuring device, and measuring current on two sides of the connecting rows connected with the direct current supply circuit under each combination mode through a direct current testing device;
step 2, constructing voltage equations between all two phase connecting rows according to Hough and ohm's law, and calculating the resistance of each metal sheath of the cross interconnection section;
and 3, judging the connection defect of the corresponding metal sheath if the resistance of the metal sheath is larger than the threshold and the threshold is 10 omega.
If the dc voltage measuring device is connected in parallel with a dc power supply circuit formed by a dc power supply and a second dc measuring device connected in series, and both ends of the parallel connection are connected to a connecting bar (i.e. the structure in fig. 1) through a current limiting device, the dc voltage measuring device measures the sum of the voltage between the two connecting bars and the voltage of the two current limiting devices, calculates the voltage between the two connecting bars according to the current of the dc power supply circuit measured by the second dc measuring device and the resistance of the two current limiting devices, and then constructs a voltage equation of the voltage between the two connecting bars.
To further illustrate the above process, the following are exemplified:
fig. 2 is a high-voltage cable line cross-connection grounding system, wherein cross-connection sections are three-section cross-connection, the first section is a section a1, a section B1 and a section C1 (three-phase metal sheath of the first section), the second section is a section a2, a section B2 and a section C2 (three-phase metal sheath of the second section), and the third section is a section A3, a section B3 and a section C3 (three-phase metal sheath of the third section), wherein the first sections a1, a2 and a section A3 are connected with the tail ends of the sections C1, C2 and C3 through grounding leads or the ground; the A1-B2-C3 segments are connected with each other, the A2-B3-C1 segments are connected with each other, and the A3-B1-C2 segments are connected with each other; the equivalent circuit is shown in fig. 3.
The two wire clamps are respectively connected with the connecting row between A1-B2 and the connecting row between A2-B3, and after direct current is applied, U (A1-A2), IA11, IA21, IB11 and IB21 shown in FIG. 4 can be obtained, so that an equation U (A1-A2) ═ RA1 ═ IA11+ RA2 ═ IA21 ═ RB (RB2+ RC3) < '> IB21+ (RB3+ RC1) <' > IB31 shown in FIG. 5 can be constructed.
In the same way, two wire clamps are respectively connected with a connecting row between A2 and B3 and a connecting row between A3 and B1, a connecting row between A1 and B2 and a connecting row between A3 and B1, a connecting row between B1 and C2 and a connecting row between B2 and C3, a connecting row between B1 and C2 and a connecting row between B3 and C1, B2 and C3 and a connecting row between B3 and C1.
The data shown in Table 1 were obtained.
Data measured as in Table 1
| U(A1-A2)/mV | 25.5 | U(A1-A3)/mV | 33.9 | U(A2-A3)/mV | 14.6 |
| IA11/mA | 1.1 | IA12/mA | 1.4 | IA23/mA | 66.7 |
| IA21/mA | 88.9 | IA32/mA | 118.6 | IA33/mA | 33.3 |
| IB21/mA | 28.4 | IB22/mA | 37.9 | IB33/mA | 66.7 |
| IB31/mA | 59.5 | IB12/mA | 79.3 | IB13/mA | 33.3 |
| U(C1-C2)/mV | 19.1 | U(C1-C3)/mV | 15.9 | U(C2-C3)/mV | 16.6 |
| IB34/mA | 0.7 | IB35/mA | 0.6 | IB16/mA | 40 |
| IB14/mA | 119.3 | IB25/mA | 99.4 | IB26/mA | 80 |
| IC14/mA | 18.9 | IC15/mA | 15.8 | IC26mA | 40 |
| IC24/mA | 99.6 | IC35/mA | 83 | IC36/mA | 80 |
The following equations are constructed:
U(A1-A2)＝RA1*IA11+RA2*IA21＝(RB2+RC3)*IB21+(RB3+RC1)*IB31
U(A1-A3)＝RA1*IA12+RA3*IA32＝(RB2+RC3)*IB22+(RB1+RC2)*IB12
U(A2-A3)＝RA2*IA23+RA3*IA33＝(RB3+RC1)*IB33+(RB1+RC2)*IB13
U(C1-C2)＝RC1*IC14+RC2*IC24＝(RB3+RA1)*IB34+(RB1+RA3)*IB14
U(C1-C3)＝RC1*IC15+RC3*IC35＝(RB3+RA1)*IB35+(RB2+RA1)*IB25
U(C2-C3)＝RC2*IC26+RC3*IC36＝(RB1+RA3)*IB16+(RB2+RA1)*IB26
substituting the data yields the following parameters:
25.5＝RA1*1.1+RA2*88.9＝(RB2+RC3)*28.4+(RB3+RC1)*59.5
33.9＝RA1*1.4+RA3*118.6＝(RB2+RC3)*37.9+(RB1+RC2)*79.3
14.6＝RA2*66.7+RA3*33.3＝(RB3+RC1)*66.7+(RB1+RC2)*33.3
19.1＝RC1*18.9+RC2*99.6＝(RB3+RA1)*0.7+(RB1+RA3)*119.3
15.9＝RC1*15.8+RC3*83＝(RB3+RA1)*0.6+(RB2+RA1)*99.4
16.6＝RC2*40+RC3*80＝(RB1+RA3)*40+(RB2+RA1)*80
calculating RA1, RA2, RA3, R (B2+ C3), R (B3+ C1) and R (B1+ C2) to be 20000 m Ω, 80m Ω, 160m Ω and 160m Ω respectively; calculated RC1, RC2, RC3, R (B3+ A1), R (B1+ A3) and R (B2+ A1) are respectively 80m omega, 20080m omega, 160m omega and 20080m omega.
Since R (B2+ C3) ═ RB2+ RC 3; r (B3+ C1) ═ RB3+ RC 1; r (B1+ C2) ═ RB1+ RC 2; substituting RA1, RA2, RA3, RC1, RC2 and RC3 to obtain RB1, RB2 and RB3 which are respectively 80m omega, 80m omega and 80m omega.
Substituting RB1, RB2, RB3, RA1, RA2, RA3 into the following formula:
verification is carried out on the conditions that R (B3+ A1) ═ RB3+ RA1, R (B1+ A3) ═ RB1+ RA3 and R (B2+ A1) ═ RB2+ RA1, and the equations are equal, so that the calculation is correct.
And judging the connection defect of the cable metal sheath according to the calculation result that RA1 is 20 ohm and is more than 10 ohm.
The invention applies direct current to the two-phase connecting rows at the protective grounding side of a group of cables at the cross interconnection section by using the direct current power supply, measures the voltage between the two-phase connecting rows by using the direct current voltage measuring device, measures the current at the two sides of the connecting rows by using the direct current testing device, thereby obtaining the resistance of each metal sheath at the cross interconnection section, judging whether the metal sheath of the cable is connected with the defect according to the resistance value, and being capable of carrying out testing under the charged state of a high-voltage cable line.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (9)
1. The utility model provides an electrified testing arrangement of high tension cable alternately interconnection metal sheath defect which characterized in that: the device comprises a direct current power supply circuit, a direct current voltage measuring device and a direct current testing device;
two ends of the direct current power supply circuit are respectively externally connected with any two-phase connecting bar of a group of cable protection grounding sides of the cross interconnection section, and direct current is applied to the metal sheaths connected with the connecting bars;
the direct current voltage measuring device measures the voltage between two connected rows connected with the direct current power supply circuit;
the direct current testing device measures the current on the two sides of the row connected with the direct current power supply circuit.
2. The device for testing the defects of the high-voltage cable cross-connection metal sheath in the electrified manner according to claim 1, wherein: the direct current testing device comprises a direct current sensor and first direct current measuring equipment connected with the direct current sensor, the direct current sensor is detachably arranged on one side of the connecting row, and currents on two sides of the connecting row are measured by adjusting the position of the direct current sensor.
3. The device for testing the defects of the high-voltage cable cross-connection metal sheath in the electrified manner according to claim 1, wherein: the direct current power supply circuit comprises a direct current power supply and second direct current measuring equipment which are connected in series, the direct current voltage measuring device is connected with the direct current power supply circuit in parallel, and two ends of the parallel connection are connected with the connecting bar in an external mode through current limiting equipment.
4. The device for testing the defects of the high-voltage cable cross-connection metal sheath in the electrified manner according to claim 3, wherein: the direct current power supply is a storage battery power supply or a constant current source with the output current ripple coefficient not more than 0.1%.
5. The device for testing the defects of the high-voltage cable cross-connection metal sheath in the electrified manner according to claim 3, wherein: the current limiting device is a metal coil or a resistor.
6. The device for testing the defects of the high-voltage cable cross-connection metal sheath in the electrified manner according to claim 3, wherein: the precision of the direct current voltage measuring device is not lower than 0.2 level, the precision of the first direct current measuring device is not lower than 0.2 level, and the precision of the second direct current measuring device is not lower than 0.5 level.
7. The method for testing the defect electrification of the high-voltage cable cross-connection metal sheath according to claim 1, which is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
traversing every two combination modes of all three-phase connecting rows of the cross interconnection section, applying direct current to the metal sheaths connected with the two-phase connecting rows of each combination mode through a direct current supply circuit, measuring the voltage between the two-phase connecting rows of each combination mode through a direct current voltage measuring device, and measuring the current on two sides of the connecting row connected with the direct current supply circuit under each combination mode through a direct current testing device;
constructing a voltage equation between all two phase connecting rows according to Hough and ohm's law, and calculating the resistance of each metal sheath of the cross interconnection section;
and responding to the metal sheath resistance larger than the threshold value, and judging the corresponding metal sheath connection defect.
8. The method for testing the defect electrification of the high-voltage cable cross-connection metal sheath according to claim 7, wherein the method comprises the following steps: the method comprises the steps that a response direct current voltage measuring device is connected with a direct current power supply circuit formed by a direct current power supply and second direct current measuring equipment which are connected in series in parallel, two ends of the direct current power supply circuit are connected with a connecting bar in an external mode through current limiting equipment, the direct current voltage measuring device measures the sum of voltage between two connecting bars and voltage of the two current limiting equipment, the voltage between the two connecting bars is calculated according to the direct current power supply circuit current measured by the second direct current measuring equipment and resistance of the two current limiting equipment, and then a voltage equation of the voltage between the two connecting bars is constructed.
9. The method for testing the defect electrification of the high-voltage cable cross-connection metal sheath according to claim 7, wherein the method comprises the following steps: the threshold is 10 Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010847627.6A CN111856216A (en) | 2020-08-21 | 2020-08-21 | Device and method for testing defects of high-voltage cable cross-connection metal sheath in electrified manner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010847627.6A CN111856216A (en) | 2020-08-21 | 2020-08-21 | Device and method for testing defects of high-voltage cable cross-connection metal sheath in electrified manner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111856216A true CN111856216A (en) | 2020-10-30 |
Family
ID=72970051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010847627.6A Pending CN111856216A (en) | 2020-08-21 | 2020-08-21 | Device and method for testing defects of high-voltage cable cross-connection metal sheath in electrified manner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111856216A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112596001A (en) * | 2020-12-07 | 2021-04-02 | 欣旺达电动汽车电池有限公司 | Method and device for detecting looseness of module connecting row and computer equipment |
| CN113009376A (en) * | 2021-02-25 | 2021-06-22 | 江苏省电力试验研究院有限公司 | Parameter testing method and device for high-voltage cable cross-connection grounding system |
| CN113504487A (en) * | 2021-06-02 | 2021-10-15 | 国网江苏省电力有限公司电力科学研究院 | Method and device for detecting connection state of high-voltage cable cross-connection grounding system |
| CN114113758A (en) * | 2021-11-02 | 2022-03-01 | 国网江苏省电力有限公司电力科学研究院 | Device and method for detecting defects of high-voltage cable cross transposition grounding system |
| CN115372711A (en) * | 2022-08-16 | 2022-11-22 | 江苏省电力试验研究院有限公司 | High-voltage cable line actual impedance detection and calculation method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03277978A (en) * | 1990-03-27 | 1991-12-09 | Sumitomo Electric Ind Ltd | Diagnostic method for deterioration of power cable |
| CN101025429A (en) * | 2006-12-28 | 2007-08-29 | 上海电力学院 | Method and device for on-line monitoring power cable metal sheath layer insulating state |
| JP2011185890A (en) * | 2010-03-11 | 2011-09-22 | Kanto Electrical Safety Inspection Association | Power cable insulation resistance recording device, and evaluation method |
| CN103487727A (en) * | 2013-06-21 | 2014-01-01 | 深圳供电局有限公司 | High-voltage power cable outer sheath fault online positioning method |
| CN103902835A (en) * | 2014-04-14 | 2014-07-02 | 北京恒华伟业科技股份有限公司 | Method and device for acquiring induced voltage of cable sheath |
| CN106226650A (en) * | 2016-07-05 | 2016-12-14 | 长沙理工大学 | A kind of single-core power cables protective metal shell Fault Locating Method |
| CN109001519A (en) * | 2018-09-10 | 2018-12-14 | 国网江苏省电力有限公司电力科学研究院 | A kind of electrification positioning cable outer jacket breaks the apparatus and method of protective metal shell grounding point outside |
| CN110940886A (en) * | 2018-09-25 | 2020-03-31 | 长沙理工大学 | 110kV cross-connection cable fault diagnosis method based on differential current analysis |
| CN212410756U (en) * | 2020-08-21 | 2021-01-26 | 国网江苏省电力有限公司电力科学研究院 | High-voltage cable cross-connection metal sheath defect live-line testing device |
-
2020
- 2020-08-21 CN CN202010847627.6A patent/CN111856216A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03277978A (en) * | 1990-03-27 | 1991-12-09 | Sumitomo Electric Ind Ltd | Diagnostic method for deterioration of power cable |
| CN101025429A (en) * | 2006-12-28 | 2007-08-29 | 上海电力学院 | Method and device for on-line monitoring power cable metal sheath layer insulating state |
| JP2011185890A (en) * | 2010-03-11 | 2011-09-22 | Kanto Electrical Safety Inspection Association | Power cable insulation resistance recording device, and evaluation method |
| CN103487727A (en) * | 2013-06-21 | 2014-01-01 | 深圳供电局有限公司 | High-voltage power cable outer sheath fault online positioning method |
| CN103902835A (en) * | 2014-04-14 | 2014-07-02 | 北京恒华伟业科技股份有限公司 | Method and device for acquiring induced voltage of cable sheath |
| CN106226650A (en) * | 2016-07-05 | 2016-12-14 | 长沙理工大学 | A kind of single-core power cables protective metal shell Fault Locating Method |
| CN109001519A (en) * | 2018-09-10 | 2018-12-14 | 国网江苏省电力有限公司电力科学研究院 | A kind of electrification positioning cable outer jacket breaks the apparatus and method of protective metal shell grounding point outside |
| CN110940886A (en) * | 2018-09-25 | 2020-03-31 | 长沙理工大学 | 110kV cross-connection cable fault diagnosis method based on differential current analysis |
| CN212410756U (en) * | 2020-08-21 | 2021-01-26 | 国网江苏省电力有限公司电力科学研究院 | High-voltage cable cross-connection metal sheath defect live-line testing device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112596001A (en) * | 2020-12-07 | 2021-04-02 | 欣旺达电动汽车电池有限公司 | Method and device for detecting looseness of module connecting row and computer equipment |
| CN112596001B (en) * | 2020-12-07 | 2022-10-28 | 欣旺达电动汽车电池有限公司 | Method and device for detecting looseness of module connecting row and computer equipment |
| CN113009376A (en) * | 2021-02-25 | 2021-06-22 | 江苏省电力试验研究院有限公司 | Parameter testing method and device for high-voltage cable cross-connection grounding system |
| CN113504487A (en) * | 2021-06-02 | 2021-10-15 | 国网江苏省电力有限公司电力科学研究院 | Method and device for detecting connection state of high-voltage cable cross-connection grounding system |
| CN113504487B (en) * | 2021-06-02 | 2024-04-05 | 国网江苏省电力有限公司电力科学研究院 | Method and device for detecting connection state of high-voltage cable cross-connection grounding system |
| CN114113758A (en) * | 2021-11-02 | 2022-03-01 | 国网江苏省电力有限公司电力科学研究院 | Device and method for detecting defects of high-voltage cable cross transposition grounding system |
| CN115372711A (en) * | 2022-08-16 | 2022-11-22 | 江苏省电力试验研究院有限公司 | High-voltage cable line actual impedance detection and calculation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212410756U (en) | High-voltage cable cross-connection metal sheath defect live-line testing device | |
| CN111856216A (en) | Device and method for testing defects of high-voltage cable cross-connection metal sheath in electrified manner | |
| CN113030792B (en) | Live detection method and device for metal sheath connection defect of high-voltage cable grounding system | |
| CN111856206B (en) | Live detection method and device for electrical connection defects of cable metal sheath | |
| CN113504487B (en) | Method and device for detecting connection state of high-voltage cable cross-connection grounding system | |
| CN212391567U (en) | Electrified testing arrangement of high tension cable ground connection defect | |
| CN105425107B (en) | A kind of method and its system of active power distribution network fault diagnosis and location | |
| CN111781426A (en) | High-voltage cable cross interconnection loop resistance live detection system and method | |
| CN212646868U (en) | Electrified detection device of cable metal sheath electrical connection defect | |
| CN114035118B (en) | Protective layer ground fault detection method, positioning method, detection system and positioning system | |
| CN113759279B (en) | Live test method and device for ground connection defect of single-end grounding system of high-voltage cable | |
| CN114047411A (en) | Method and device for detecting cross interconnection state of high-voltage power cable lines | |
| CN103823138A (en) | Circuit for monitoring power supply line electric parameters with auxiliary line | |
| CN105548800A (en) | Handheld low voltage power transmission detection device and method | |
| CN115453256A (en) | Defect diagnosis and positioning method and device for cable cross-connection grounding system | |
| CN107688136B (en) | Method for judging and positioning grounding point of extra-high voltage long-distance transmission line | |
| CN108614194A (en) | A kind of double line down distance measuring method and device based on distributed parameter model | |
| CN106649946B (en) | Power frequency phase parameter simulation calculation method for power transmission line | |
| CN113884737B (en) | Live test method and device for connection state of single-end grounding system of high-voltage cable | |
| CN111638423A (en) | Power cable positioning method for grounding faults of sheath layer and armor layer | |
| CN111856217A (en) | High-voltage cable grounding connection defect live-line test device and method | |
| CN113805101A (en) | Cable cross interconnection system connection state testing method and testing device | |
| CN108845183B (en) | Multi-electric aircraft cable impedance measurement method | |
| CN105717428B (en) | A kind of cable partial discharge live correction method based on HFCT | |
| CN114839420A (en) | Method and device for testing maximum value of circular current of cross-connection grounding system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |