CN110794336A - Insulation detection method of alternating current system - Google Patents
Insulation detection method of alternating current system Download PDFInfo
- Publication number
- CN110794336A CN110794336A CN201911293552.5A CN201911293552A CN110794336A CN 110794336 A CN110794336 A CN 110794336A CN 201911293552 A CN201911293552 A CN 201911293552A CN 110794336 A CN110794336 A CN 110794336A
- Authority
- CN
- China
- Prior art keywords
- zero
- line
- current data
- current
- alternating current
- 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
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
- G01R31/12—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
Abstract
The embodiment of the invention discloses an insulation detection method of an alternating current system, which is applied to an insulation monitoring device of the alternating current system, wherein the insulation monitoring device of the alternating current system comprises an intelligent detection module and an alternating current acquisition module, and the intelligent detection module is connected with the alternating current acquisition module; the insulation detection method of the alternating current system comprises the following steps: acquiring leakage current data acquired by the alternating current acquisition module; and judging whether the alternating current system leaks electricity according to the leakage current data. The high-accuracy and intelligent insulation detection of the alternating current system is realized.
Description
Technical Field
The embodiment of the invention relates to the technical field of alternating current systems and photovoltaic power generation for power distribution websites, in particular to an insulation detection method for an alternating current system.
Background
With the advance of the safety construction of the power distribution network, the safety operation of the power distribution network is ensured, and the stability and the reliability of power supply of a power system are improved.
Low-voltage ac power used in power systems is divided into single-phase ac voltage and three-phase ac voltage, and in these ac voltage systems, many faults are caused due to the complicated diversity of lines. In the insulation detection method of the alternating current system at present, a leakage current sensor is sleeved on an A, B, C phase line to detect alternating current leakage current, but in actual conditions, three-phase current cannot reach a balanced state under ideal conditions, detection errors can be generated due to unbalanced three phases, some alternating current systems are dual-power supply systems, two paths of three-phase alternating current power supplies are arranged in the same loop to supply power, three-phase current in two paths is unbalanced, detection errors are increased, results are inaccurate, and the prior art has the defect of inaccurate detection.
Disclosure of Invention
The embodiment of the invention provides an insulation detection method of an alternating current system, which aims to realize high-accuracy and intelligent insulation detection of the alternating current system.
The embodiment of the invention provides an insulation detection method of an alternating current system, which is applied to an insulation monitoring device of the alternating current system.
The insulation detection method of the alternating current system comprises the following steps:
acquiring leakage current data acquired by the alternating current acquisition module;
and judging whether the alternating current system leaks electricity according to the leakage current data.
Optionally, the determining whether the alternating current system leaks current according to the leakage data includes:
judging whether the leakage current data is larger than a preset current data threshold value or not;
and if so, judging that the alternating current system leaks electricity.
Optionally, the alternating current system is a three-phase alternating current system; the three-phase alternating current system comprises a first phase line, a second phase line, a third phase line and a first zero line,
obtain the leakage current data that alternating current collection module gathered, include:
acquiring first zero-sequence current data of the first phase line, the second phase line and the third phase line and first zero line current data of the first zero line;
and determining leakage current data according to the first zero sequence current data and the first zero line current data.
Optionally, the alternating current system is a dual-power three-phase alternating current system; the dual-power alternating current system comprises a first phase line, a second phase line, a third phase line, a first zero line, a fourth phase line, a fifth phase line, a sixth phase line and a second zero line,
obtain the leakage current data that alternating current collection module gathered, include:
acquiring first zero-sequence current data of the first phase line, the second phase line and the third phase line and first zero line current data of the first zero line;
acquiring second zero-sequence current data of the fourth phase line, the fifth phase line and the sixth phase line and second zero-line current data of a second zero line;
and determining leakage current data according to the first zero sequence current data, the second zero sequence current data, the first zero line current data and the second zero line current data.
Optionally, the alternating current system is a single-phase alternating current system; the single-phase alternating current system comprises a seventh phase line and a third zero line;
obtain the leakage current data that alternating current collection module gathered, include:
and directly acquiring leakage current data on the seventh phase line and the third zero line.
Optionally, determining leakage current data according to the first zero-sequence current data and the first zero-line current data includes:
and calculating leakage current data according to the first zero sequence current data and the first zero line current data, wherein the leakage current data is a difference value of the first zero sequence current data and the first zero line current data.
Optionally, determining leakage current data according to the first zero-sequence current data, the first zero-line current data, the second zero-sequence current data, and the second zero-line current data includes:
calculating third zero-sequence current data according to the first zero-sequence current data and the second zero-sequence current data, and calculating third zero-line current data according to the first zero-line current data and the second zero-line current data;
and calculating leakage current data according to the third zero sequence current data and the third zero line current data, wherein the leakage current is a difference value of the third zero sequence current data and the third zero line current data.
Optionally, the alternating current system is a dual-power three-phase alternating current system; the dual-power alternating current system comprises a first phase line, a second phase line, a third phase line, a first zero line, a fourth phase line, a fifth phase line, a sixth phase line and a second zero line; the alternating current acquisition module comprises a first zero sequence current acquisition unit, a second zero sequence current acquisition unit, a first zero line current acquisition unit and a second zero line current acquisition unit,
before obtaining the leakage current data collected by the alternating current collection module, the method further comprises the following steps:
configuring addresses of the first zero sequence current acquisition unit, the second zero sequence current acquisition unit, the first zero line current acquisition unit and the second zero line current acquisition unit;
configuring addresses of the first zero sequence current acquisition unit, the second zero sequence current acquisition unit, the first zero line current acquisition unit and the second zero line current acquisition unit, including:
acquiring a first address of the first zero-sequence current acquisition unit, a second address of the second zero-sequence current acquisition unit, a third address of the first zero-line current acquisition unit and a fourth address of the second zero-line current acquisition unit;
configuring the first address, the second address, the third address, and the fourth address to be in the same loop.
Optionally, the first zero-sequence current collecting unit, the second zero-sequence current collecting unit, the first zero-line current collecting unit and the second zero-line current collecting unit are all leakage current sensors.
Optionally, the insulation detecting method further comprises,
and sending alarm data after the alternating current system is judged to be in electric leakage.
According to the embodiment of the invention, the insulation fault is judged by acquiring the leakage current data acquired by the alternating current acquisition module and then judging whether the alternating current system leaks electricity according to the leakage current data. The problem of among the prior art alternating current collection module only gather the balanced state under the ideal condition of the three-phase current that the current data on each phase line of alternating current system arouses, cause inaccurate of detection etc is solved, the accuracy that has improved alternating current system and has detected has also reached intelligent detection's effect.
Drawings
Fig. 1 is a schematic structural diagram of an insulation monitoring device of an ac system according to an embodiment of the present invention;
fig. 2 is a flowchart of an insulation detection method of an ac system according to an embodiment of the present invention;
fig. 3 is a flowchart of an insulation detection method of an ac system according to a second embodiment of the present invention;
fig. 4 is a flowchart of an insulation detection method of an ac system according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a schematic structural diagram of an insulation monitoring device of an ac system according to an embodiment of the present invention. Fig. 2 is a flowchart of an insulation detection method of an ac system according to an embodiment of the present invention. As shown in fig. 1, the insulation monitoring method of the ac system is applied to an insulation monitoring device of the ac system, the insulation monitoring device of the ac system includes an intelligent detection module 10 and an ac current collection module 20, and the intelligent detection module 10 is connected to the ac current data collection module 20. The insulation detection method of the alternating current system comprises the following steps:
and S110, acquiring leakage current data acquired by the alternating current acquisition module.
The alternating current acquisition module can comprise an alternating current acquisition unit, a first control unit and a range switching unit, wherein the alternating current acquisition unit acquires current data of a current alternating current system, the current data is converted into digital data through the first control unit, and the effective value of the current is obtained through calculation. And the switching of the range is realized according to the range switching unit, and alternating current data with the set range size is acquired.
In the three-phase four-wire system alternating current system, the circuit is normal, the vector sum of three-phase currents is zero, if the currents of three phases are represented by Ia, Ib and Ic, the vector sum of the three-phase alternating currents is zero, namely Ia + Ib + Ic is 0; if the circuit has a leakage fault, the vector sum of the phase currents is not zero, the current sum of the three phases is not zero, and the vector sum of the phase currents of the three phases is equal to zero-sequence current data.
The method is characterized in that leakage current data are determined by zero sequence current data on an alternating current system and zero line current data on a zero line, and the method is different from the scheme of acquiring current phasors in three phases and determining the zero sequence current data in the traditional insulation detection mode.
And S120, judging whether the alternating current system leaks electricity according to the leakage current data.
The traditional insulation detection method is to judge that the circuit has faults through the current phasor sum in the alternating current system which is not zero, and is not accurate. In the scheme, the alternating current acquisition module acquires zero line current data on a zero line besides acquiring the zero sequence current, and the zero sequence current and the zero line current are combined to calculate leakage current data to perform leakage current analysis, so that the detection inaccuracy is avoided, and the insulation detection accuracy is improved.
The embodiment of the invention acquires zero sequence current data and zero line current data acquired by the alternating current acquisition module; and then, whether the alternating current system leaks electricity is judged according to the zero-sequence current data and the zero-line current data, so that the problem that the alternating current system leakage detection result is unreliable only judged through the zero-sequence current data in the prior art is solved, and the effects of high accuracy, intelligent detection and the like of the alternating current system are achieved.
Optionally, the insulation detection method for the ac system provided in the embodiment of the present invention may be applicable to ac systems with different structures, and the insulation detection method for the ac system provided in the embodiment of the present invention is described in detail below with respect to ac systems with different structures. Optionally, the alternating current system in the embodiment of the present invention may be a three-phase alternating current system, and may also be a single-phase alternating current system or a dual-power three-phase alternating current system, which is not limited in the embodiment of the present invention.
First, an ac system will be described as an example of a three-phase ac system.
If the alternating current system is a three-phase alternating current system, the three-phase alternating current system comprises a first phase line, a second phase line, a third phase line and a first zero line.
The leakage current data acquired by the alternating current acquisition module can be acquired by the alternating current acquisition unit respectively acquiring first zero-sequence current data of the first phase line, the second phase line and the third phase line and first zero line current data of the first zero line, and a difference value between the first zero-sequence current data and the first zero line current data is the leakage current data of the three-phase alternating current system. The determining whether the alternating current system leaks current according to the leakage current data may be determining whether the alternating current system leaks current according to a difference between the first zero-sequence current data and the first zero-line current data.
Next, an ac system will be described as an example of a dual-power three-phase ac system.
If the alternating current system is a dual-power three-phase alternating current system, the dual-power alternating current system comprises a first phase line, a second phase line, a third phase line, a first zero line, a fourth phase line, a fifth phase line, a sixth phase line and a second zero line.
The leakage current data acquired by the alternating current acquisition module can be acquired by the alternating current acquisition unit respectively acquiring first zero-sequence current data of a first phase line, a second phase line and a third phase line and a first zero line of the first zero line; meanwhile, the alternating current acquisition unit acquires second zero-sequence current data and second zero line data of a fourth phase line, a fifth phase line and a sixth phase line. The intelligent detection module calculates third zero-sequence current data according to the sum of the first zero-sequence current data and the second zero-sequence current data, calculates third zero-line current data according to the sum of the first zero-line current data and the second zero-line current data, and calculates leakage current data according to the difference value of the third zero-sequence current data and the third zero-line current data. And judging whether the alternating current system leaks electricity according to the leakage current data can be judging whether the alternating current system leaks electricity according to the difference value of the third zero-sequence current data and the third zero-line current data.
Next, an ac system will be described as an example of a single-phase ac system.
If the alternating current system is a single-phase alternating current system, the single-phase alternating current system comprises a seventh phase line and a third zero line.
The leakage current data acquired by the alternating current acquisition module can be acquired by the alternating current acquisition unit which is simultaneously arranged on the seventh phase line and the third zero line, and the alternating current acquisition unit directly acquires the leakage current data on the seventh phase line and the third zero line. And judging whether the alternating current system leaks electricity according to the leakage current data can be directly judging whether the alternating current system leaks electricity according to the leakage current data collected by the alternating current collecting unit.
In summary, in different ac systems, the insulation detection method for the ac system provided by the embodiment of the present invention may be implemented by obtaining zero-sequence current data and zero-line current data acquired by the ac current acquisition module; and then calculating the difference between the zero-sequence current data and the zero-line current data to be leakage current data aiming at different alternating current systems, and then judging whether the alternating current system leaks electricity according to the leakage current data, so that the problem that the alternating current system leakage detection result is unreliable only through the zero-sequence current data in the prior art is solved, and the effects of high accuracy, intelligent detection and the like on the alternating current system are realized.
Example two
Fig. 3 is a method for detecting insulation of an ac system according to a second embodiment of the present invention, which is further optimized based on the second embodiment of the present invention, and specifically, how to determine leakage of the ac system is described. Optionally, the insulation detection method specifically includes:
s210, acquiring leakage current data acquired by the alternating current acquisition module.
S220, judging whether the leakage current data is larger than a preset current data threshold value.
And S230, if yes, judging that the alternating current system leaks electricity.
After acquiring zero-sequence current data, judging the zero-sequence data of the alternating current system, and if the zero-sequence current data is zero, judging that the alternating current system normally works; if the zero-sequence current data is larger than zero, then according to the fact that whether the difference value of the zero-sequence current and the zero line current of the leakage current data is larger than a preset leakage current data threshold value or not, if the difference value is larger than the preset leakage current data threshold value, the alternating current system is judged to be leakage, and the accuracy and the stability of detection of the alternating current system are improved.
And S240, sending alarm data after the alternating current system is judged to be in electric leakage.
When the alternating current system leaks electricity, the alarm unit in the intelligent detection module in the alternating current monitoring device can give an alarm in response when receiving an order, send alarm data and find the leakage fault in advance, so that various accidents caused by the leakage are avoided, and intelligent insulation detection of the alternating current system is also achieved.
The embodiment of the invention further judges whether the difference value of the zero-sequence current data and the zero-line current, namely the leakage current data is larger than the preset leakage current data threshold value or not on the basis of acquiring the leakage current data, and when the leakage current data is larger than the preset leakage current data threshold value, the leakage of the alternating current system is judged and alarm data is sent out. Therefore, intelligent detection of the alternating current system is realized, early warning and alarming can be quickly responded, and the detection method is simple and reliable.
EXAMPLE III
Optionally, if the ac system is a three-phase ac system, the ac system includes a first phase line, a second phase line, a third phase line, and a first zero line. The alternating current acquisition module can comprise a first zero sequence current acquisition unit and a first zero line current acquisition unit. Optionally, the first zero-sequence current collecting unit and the first zero-line current collecting unit may both be leakage current sensors.
Optionally, if the alternating current system is a dual-power three-phase alternating current system; the dual-power alternating current system comprises a first phase line, a second phase line, a third phase line, a first zero line, a fourth phase line, a fifth phase line, a sixth phase line and a second zero line. The alternating current acquisition module can comprise a first zero sequence current acquisition unit, a second zero sequence current acquisition unit, a first zero line current acquisition unit and a second zero line current acquisition unit. Optionally, the first zero-sequence current collecting unit, the second zero-sequence current collecting unit, the first zero-line current collecting unit, and the second zero-line current collecting unit may all be leakage current sensors.
Fig. 4 is a flowchart of an insulation detection method of an ac system according to a third embodiment of the present invention. The method is further optimized on the basis of the first embodiment and the second embodiment, and specifically, a step of configuring the zero-sequence current acquisition unit and the zero-line current acquisition unit is added. Optionally, the insulation detection method in this embodiment includes the specific steps of:
and S310, configuring the address of the current acquisition unit in the alternating current acquisition module.
The address configuration of the alternating current acquisition module means that a first address of a first zero-sequence current acquisition unit, a second address of a second zero-sequence current acquisition unit, a third address of the first zero-line current acquisition unit and a fourth address of the second zero-line current acquisition unit are obtained, and then the first address, the second address, the third address and the fourth address are configured to be located in the same loop. Illustratively, the first zero-sequence current acquisition unit, the second zero-sequence current acquisition unit, the first zero-line current acquisition unit and the second zero-line current acquisition unit are all leakage current sensors, addresses of the four leakage current sensors are acquired, the addresses of the four leakage current sensors are configured to be located in the same loop, and then the four leakage current sensors acquire zero-sequence current data and zero-line current data of the loop in which the four leakage current sensors are located. The simple configuration realizes the intelligent operation of the detection process.
Optionally, the alternating current system in the embodiment of the present invention may be a three-phase alternating current system, or may also be a single-phase alternating current system or a dual-power three-phase alternating current system, which is not limited in the embodiment of the present invention, and only the dual-power three-phase alternating current system is taken as an example for description.
And S320, acquiring leakage current data acquired by the alternating current acquisition module.
S330, judging whether the leakage current data is larger than a preset current data threshold value.
And S340, if yes, judging that the alternating current system leaks electricity.
And S350, sending alarm data after the alternating current system is judged to be in electric leakage.
The embodiment of the invention configures the address of the current acquisition unit of the alternating current acquisition module, firstly acquires the first address of the first alternating zero sequence current acquisition unit, the second address of the second zero sequence current acquisition unit, the third address of the first zero line current acquisition unit and the fourth address of the second zero line current acquisition unit, configures the first address, the second address, the third address and the fourth address to be positioned in the same loop, then each alternating current acquisition unit acquires current data of each line, calculates the sum of the first zero sequence current and the second zero sequence current and the sum of the first zero line current and the second zero line current, and then, calculating the difference value of the two sums, judging whether the alternating current system leaks electricity according to the calculated difference value, judging that the alternating current system leaks electricity when the difference value is larger than a preset leakage current data threshold value, and then giving alarm data by an intelligent monitoring module. The problem of in the prior art only rely on zero sequence current data to carry out fault diagnosis etc. is solved, effect such as accurate detection, intelligent detection to alternating current system has been reached.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The insulation detection method of the alternating current system is characterized by being applied to an insulation monitoring device of the alternating current system, wherein the insulation monitoring device of the alternating current system comprises an intelligent detection module and an alternating current acquisition module, and the intelligent detection module is connected with the alternating current acquisition module;
the insulation detection method of the alternating current system comprises the following steps:
acquiring leakage current data acquired by the alternating current acquisition module;
and judging whether the alternating current system leaks electricity according to the leakage current data.
2. The insulation detection method according to claim 1, wherein said determining whether the alternating current system leaks current based on the leakage current data includes:
judging whether the leakage current data is larger than a preset current data threshold value or not;
and if so, judging that the alternating current system leaks electricity.
3. The insulation detection method according to claim 1, wherein the alternating current system is a three-phase alternating current system; the three-phase alternating current system comprises a first phase line, a second phase line, a third phase line and a first zero line;
obtain the leakage current data that alternating current collection module gathered, include:
acquiring first zero-sequence current data of the first phase line, the second phase line and the third phase line and first zero line current data of the first zero line;
and determining leakage current data according to the first zero sequence current data and the first zero line current data.
4. The insulation detection method according to claim 1, wherein the alternating current system is a dual-power three-phase alternating current system; the dual-power alternating current system comprises a first phase line, a second phase line, a third phase line, a first zero line, a fourth phase line, a fifth phase line, a sixth phase line and a second zero line;
obtain the leakage current data that alternating current collection module gathered, include:
acquiring first zero-sequence current data of the first phase line, the second phase line and the third phase line and first zero line current data of the first zero line;
acquiring second zero-sequence current data of the fourth phase line, the fifth phase line and the sixth phase line and second zero-line current data of a second zero line;
and determining leakage current data according to the first zero sequence current data, the second zero sequence current data, the first zero line current data and the second zero line current data.
5. The insulation detection method according to claim 1, wherein the alternating current system is a single-phase alternating current system; the single-phase alternating current system comprises a seventh phase line and a third zero line;
obtain the leakage current data that alternating current collection module gathered, include:
and directly acquiring leakage current data on the seventh phase line and the third zero line.
6. The insulation detection method of claim 3, wherein determining leakage current data from the first zero sequence current data and the first zero line current data comprises:
and calculating leakage current data according to the first zero sequence current data and the first zero line current data, wherein the leakage current data is a difference value of the first zero sequence current data and the first zero line current data.
7. The insulation detection method of claim 4, wherein determining leakage current data from the first zero sequence current data, the first zero line current data, the second zero sequence current data, and the second zero line current data comprises:
calculating third zero-sequence current data according to the first zero-sequence current data and the second zero-sequence current data, and calculating third zero-line current data according to the first zero-line current data and the second zero-line current data;
and calculating leakage current data according to the third zero sequence current data and the third zero line current data, wherein the leakage current is a difference value of the third zero sequence current data and the third zero line current data.
8. The insulation detection method according to claim 4, wherein the alternating current system is a dual-power three-phase alternating current system; the dual-power alternating current system comprises a first phase line, a second phase line, a third phase line, a first zero line, a fourth phase line, a fifth phase line, a sixth phase line and a second zero line; the alternating current acquisition module comprises a first zero-sequence current acquisition unit, a second zero-sequence current acquisition unit, a first zero line current acquisition unit and a second zero line current acquisition unit;
before obtaining the leakage current data collected by the alternating current collection module, the method further comprises the following steps:
configuring addresses of the first zero sequence current acquisition unit, the second zero sequence current acquisition unit, the first zero line current acquisition unit and the second zero line current acquisition unit;
configuring addresses of the first zero sequence current acquisition unit, the second zero sequence current acquisition unit, the first zero line current acquisition unit and the second zero line current acquisition unit, including:
acquiring a first address of the first zero-sequence current acquisition unit, a second address of the second zero-sequence current acquisition unit, a third address of the first zero-line current acquisition unit and a fourth address of the second zero-line current acquisition unit;
configuring the first address, the second address, the third address, and the fourth address to be in the same loop.
9. The insulation detecting method according to claim 8, wherein the first zero-sequence current collecting unit, the second zero-sequence current collecting unit, the first zero-line current collecting unit, and the second zero-line current collecting unit are all leakage current sensors.
10. The insulation detection method according to claim 1, further comprising:
and sending alarm data after the alternating current system is judged to be in electric leakage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911293552.5A CN110794336A (en) | 2019-12-16 | 2019-12-16 | Insulation detection method of alternating current system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911293552.5A CN110794336A (en) | 2019-12-16 | 2019-12-16 | Insulation detection method of alternating current system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110794336A true CN110794336A (en) | 2020-02-14 |
Family
ID=69448345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911293552.5A Pending CN110794336A (en) | 2019-12-16 | 2019-12-16 | Insulation detection method of alternating current system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110794336A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112230109A (en) * | 2020-10-29 | 2021-01-15 | 株洲中车时代电气股份有限公司 | Alternating current insulation monitoring method and device, storage medium and electronic equipment |
-
2019
- 2019-12-16 CN CN201911293552.5A patent/CN110794336A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112230109A (en) * | 2020-10-29 | 2021-01-15 | 株洲中车时代电气股份有限公司 | Alternating current insulation monitoring method and device, storage medium and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9366715B2 (en) | Fault direction parameter indicator device and related methods | |
| US9250282B2 (en) | Fault parameter indicator device and related methods | |
| CA2752363C (en) | Fault location in a non-homogeneous electric power line | |
| CN105372616B (en) | A kind of CVT states Online Transaction Processing and online evaluation method | |
| Dobakhshari et al. | A wide-area scheme for power system fault location incorporating bad data detection | |
| US8866487B2 (en) | Directional fault sectionalizing system | |
| CN110174625B (en) | Insulation monitoring system and monitoring algorithm for resistance of power battery pack | |
| US20030085715A1 (en) | System and method for locating a fault on ungrounded and high-impedance grounded power systems | |
| US6466030B2 (en) | Systems and methods for locating faults on a transmission line with a single tapped load | |
| US10073148B2 (en) | Fault detection in energy supply networks | |
| CN106415286A (en) | System and method for pulsed ground fault detection and localization | |
| CN101915884B (en) | Identification method of ground fault phases in three-phase ungrounded system and identification device thereof | |
| CN106443292B (en) | A kind of overhead transmission line single-phase earth fault detecting method based on zero sequence current measurement | |
| SE536143C2 (en) | Method for detecting earth faults in three-phase electric power distribution network | |
| WO2016007217A1 (en) | Decision support system for outage management and automated crew dispatch | |
| CN105334430B (en) | A kind of single-phase ground fault distance measuring method and system based on electrical power distribution automatization system | |
| CN105548719A (en) | Detection circuit and method of grounding insulation resistors | |
| CN103439625A (en) | Cable system fault positioning and load monitoring method | |
| CN103675705A (en) | Method for redundancy check of currents of power battery | |
| CN205333777U (en) | Phase to earth fault positioner | |
| CN104977499A (en) | Small current grounding system single-phase grounding fault line selection method | |
| CN110794336A (en) | Insulation detection method of alternating current system | |
| JP5485344B2 (en) | Monitoring device, monitoring system | |
| CN112834860A (en) | Method for sensing equipment fault by detecting current change | |
| US10310017B2 (en) | Detection of generator stator inter-circuit faults |
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 |