CN114325266B - Device for detecting and positioning fault arc in commercial power environment and working method thereof - Google Patents
Device for detecting and positioning fault arc in commercial power environment and working method thereof Download PDFInfo
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- CN114325266B CN114325266B CN202111630831.3A CN202111630831A CN114325266B CN 114325266 B CN114325266 B CN 114325266B CN 202111630831 A CN202111630831 A CN 202111630831A CN 114325266 B CN114325266 B CN 114325266B
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Abstract
The invention discloses a device for detecting and positioning a fault arc in a mains supply environment, which comprises a high-speed AD acquisition module, a low-speed AD acquisition module, an isolation module, a signal conditioning module, a current transformer module, a switch module, a DA output module, a screen display module, a fault arc positioning analysis module, a fault arc detection analysis module, a fusion analysis module and a fault arc generation module, wherein the DA output module is used for generating a detection signal and sending the detection signal to the fault arc generation module, the fault arc generation module is used for generating a fault arc and generating a reflection signal when the detection signal meets the fault arc, and the high-speed AD acquisition module is used for acquiring the detection signal generated by the DA output module and the reflection signal generated by the fault arc generation module. The arc fault detection device can solve the technical problems that the existing arc fault detection device can only detect the fault arc, but cannot simultaneously detect and position the fault arc and detect the type of the fault arc.
Description
Technical Field
The invention belongs to the technical field of electrical fire safety, and particularly relates to a device for detecting and positioning a fault arc in a mains supply environment and a working method thereof.
Background
With the improvement of the application level of the social electric energy, the types of household electric equipment are gradually increased, the electricity consumption of residents is increased sharply, and electric fire accidents frequently occur, so that the electricity utilization safety in a low-voltage line is concerned. The fault arc is one of important reasons for causing electrical fire under a low-voltage line, and the detection and the positioning of the fault arc have very important significance for avoiding the occurrence of household electrical fire.
However, the existing fault arc detection devices have some non-negligible technical problems: first, the existing arc fault detection device can only detect fault arcs, but cannot simultaneously realize fault arc detection and positioning and fault arc type detection; secondly, the detection accuracy of the existing arc fault detection device is low; thirdly, because most of the current household power circuits are buried in the wall, when the existing fault arc detection device detects the fault arc, the accurate fault arc positioning can not be realized, so that the fault can not be eliminated in time, and great hidden danger is caused to the household power safety.
Disclosure of Invention
The invention provides a device for detecting and positioning a fault arc in a mains supply environment and a working method thereof, aiming at solving the technical problems that the existing arc fault detection device can only detect the fault arc, but can not simultaneously detect and position the fault arc and detect the type of the fault arc, the fault arc detection accuracy is low, and the fault arc cannot be accurately positioned when the fault arc is detected, so that the fault can not be timely eliminated, and the household power utilization safety is greatly hidden danger is caused.
In order to achieve the above object, according to one aspect of the present invention, there is provided a device for detecting and positioning a fault arc in a commercial power environment, comprising a high-speed AD collecting module, a low-speed AD collecting module, an isolating module, a signal conditioning module, a current transformer module, a switch module, a DA output module, a screen display module, a fault arc positioning analysis module, a fault arc detecting and analyzing module, a fusion analysis module, and a fault arc generating module,
the DA output module is used for generating a detection signal and sending the detection signal to the fault arc generation module;
the fault arc generation module is used for generating a fault arc and generating a reflection signal when the detection signal meets the fault arc;
the high-speed AD acquisition module is used for acquiring a detection signal generated by the DA output module and a reflection signal generated by the fault arc generation module;
the low-speed AD module is used for collecting current signals flowing through the fault arc generation module;
the isolation module is connected to an external alternating current signal and used for isolating alternating current in the external alternating current signal so as to enable a detection signal acquired by the high-speed AD acquisition module to pass through without obstruction and enable a detection signal generated by the DA output module to pass through without obstruction;
the current transformer module is used for converting large current in external alternating current signals into small current and transmitting the converted external alternating current signals to the signal conditioning module.
The signal conditioning module is used for converting a current signal in the converted external alternating current signal into a voltage signal.
The fault arc positioning analysis module is used for controlling the DA output module to generate a detection signal, calculating the distance of the fault arc and the type of the fault arc by adopting a cross-correlation algorithm according to the detection signal and the reflection signal acquired by the high-speed AD acquisition module, and storing the distance and the type of the fault arc in a first annular cache region of a fault arc positioning annular queue;
the fault arc detection analysis is used for processing the current signals acquired by the low-speed AD acquisition module, calculating the distortion rate of the current signals through the Pearson coefficient, and storing the distortion rate in a second annular buffer area of the fault arc detection annular queue.
The fusion analysis module is used for carrying out data fusion on the distance of the fault arc and the type of the fault arc obtained by the fault arc positioning analysis module and the distortion rate of the current signal obtained by the fault arc detection analysis module so as to judge whether the fault arc is generated or not, controlling the screen display module to display warning information when the fault arc is judged, controlling the relay switch of the switch module to be switched off, and informing the screen display module to output the distance of the fault arc and the type of the fault arc.
Preferably, the isolation module includes a coupling transformer, a voltage-withstanding capacitor C, and a transient suppression diode.
Preferably, the two input terminals of the coupling transformer are directly connected with the signal input terminal;
one end of the output of the coupling transformer is connected to the power line through a voltage-resistant capacitor, and the other end of the output is directly connected with the power line;
two output ends of the coupling transformer are connected with the transient suppression diode.
Preferably, the signal conditioning module includes a first operational amplifier, a second operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a potentiometer, and a first capacitor.
Preferably, one end of the first resistor is connected with one end of the second resistor and the alternating current signal input end, and the other end of the first resistor is directly connected with the signal input grounding end;
one end of the first capacitor is connected with the other end of the second resistor and the signal positive input end of the first operational amplifier, and the other end of the first capacitor is connected to a signal input grounding end;
one end of the third resistor is connected with the signal inverting input end of the first operational amplifier and the signal output end of the first operational amplifier, and the other end of the third resistor is connected to the signal positive input end of the second operational amplifier;
one end of the fourth resistor is connected with the signal inverting input end of the second operational amplifier and the potentiometer, and the other end of the fourth resistor is connected to the ground end.
The other end of the potentiometer is connected to the signal output end of the second operational amplifier.
According to another aspect of the present invention, there is provided a method for operating the apparatus for detecting and locating a fault arc in a commercial power environment, comprising the following steps:
(1) The DA output module outputs a detection signal and transmits the emission signal to the fault arc generation module through the isolation module 3;
(2) The fault arc generating module generates a fault arc and generates a reflection signal when the detection signal meets the fault arc;
(3) The low-speed AD acquisition module acquires a current signal flowing through the fault arc generation module through the current transformer module and the signal conditioning module and transmits the current signal to the fault arc detection and analysis module.
(4) The high-speed AD acquisition module 1 acquires a detection signal from the DA output module and a reflection signal from the fault arc generation module through the isolation module;
(5) The fault arc positioning analysis module processes the detection signal and the reflection signal acquired by the high-speed AD acquisition module by using a cross-correlation algorithm to obtain distance data D of the fault arc and type data Ty of the fault arc;
(6) The fault arc positioning analysis module stores the distance data D of the fault arc and the fault arc type data Ty in a first annular buffer area of a fault arc positioning annular queue.
(7) The fault arc detection and analysis module processes the current signal flowing through the fault arc generation module by using a Pearson coefficient algorithm to obtain a distortion rate Dr of the current signal.
(8) The fault arc detection analysis module stores the distortion rate Dr in a second ring buffer area of the fault arc detection circular queue;
(9) And (3) judging whether the total number of data in the first ring buffer area and the second ring buffer area is equal to W by the fusion analysis module, if so, entering the step (10), and if not, returning to the step (1).
(10) The fusion analysis module reads W data in a first annular buffer area of a fault arc positioning annular queue, wherein the data comprises distance data D of fault arcs and fault arc type data Ty.
(11) And the fusion analysis module preprocesses W data in the first annular cache region, reserves data from 0 to the length of the electric wire in the distance data of the fault electric arc, and filters out the rest distance data.
(12) The fusion analysis module calculates the mean value of the distance data retained in step (11) and the divergence DI.
(13) And the fusion analysis module reads the W current distortion rate data in the second ring buffer area of the fault arc detection ring queue.
(14) The fusion analysis module counts the number T of data with distortion rate exceeding a threshold value in the data of the second annular buffer area;
(15) And the fusion analysis module judges whether the value of T is greater than or equal to Q1, if so, the fault arc exists, then the step (16) is carried out, and if not, the step (17) is carried out.
(16) And the fusion analysis module controls the screen display module to display warning information, controls the relay switch of the switch module to be switched off, controls the screen display module to display the average value A of the distance of the fault arc and the type Ty of the fault arc, and finishes the process.
(17) And the fusion analysis module judges whether the distance divergence DI of the fault arc is greater than or equal to a distance divergence threshold value TH, if so, the fault arc exists, then, the step (16) is returned, and otherwise, the step (18) is carried out.
(18) And (4) judging whether the data number T of the current distortion rate is less than or equal to Q2 by the fusion analysis module, if so, indicating that no fault arc exists, and then, turning to the step (19), otherwise, ending the process.
(19) The fusion analysis module clears the system alarm, controls the relay switch of the switch module to be closed, controls the screen display module to display that no fault arc exists, and ends the process.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
1. the device of the invention adopts the arc fusion sensing technology, which not only can detect the fault arc but also can position the fault arc, thereby solving the technical problems that the existing arc fault detection device can only detect the fault arc, but can not simultaneously realize the fault arc detection and positioning and the fault arc type detection, namely, the device not only can realize the fault arc detection and positioning functions, but also can detect the type (series arc or parallel arc) of the fault arc;
2. the device of the invention adopts a fusion analysis method, which not only can realize the functions of fault arc detection and positioning, but also can solve the technical problem of low detection accuracy of the existing arc fault detection device;
3. the device of the invention adopts a fusion analysis method, realizes the detection of the fault arc with higher precision and low missing report rate, and the fault arc positioning with higher precision, thereby solving the technical problems that the existing arc fault detection device can not realize the fault arc positioning, thereby being incapable of eliminating the fault in time and causing great hidden danger to the household electricity safety;
4. the method of the invention adopts the step (1) and the step (5) and uses a cross-correlation algorithm, thereby solving the technical problems of fault arc positioning and fault arc type detection;
5. the method of the invention is used for adopting the step (3) and the step (7) which use the Pearson coefficient algorithm, thereby solving the technical problem of detecting the fault arc
Drawings
FIG. 1 is a block diagram of the system components of the apparatus for detecting and locating a fault arc in a utility power environment of the present invention;
FIG. 2 is a detailed flowchart of the operation method of the device for detecting and locating a fault arc in a commercial power environment according to the present invention;
FIG. 3 is a specific circuit diagram of the isolation module of the apparatus of the present invention;
fig. 4 is a specific circuit diagram of a signal conditioning module in the apparatus of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the present invention provides a device for detecting and positioning a fault arc in a commercial power environment, which includes a high-speed Analog-Digital (AD) acquisition module 1, a low-speed AD acquisition module 2, an isolation module 3, a signal conditioning module 4, a current transformer module 5, a switch module 6, a Digital-Analog (DA) output module 7, a screen display module 8, a fault arc positioning analysis module 9, a fault arc detection analysis module 10, a fusion analysis module 11, and a fault arc generation module 12.
In the invention, the model of the high-speed AD acquisition module 1 is ACM9226, the model of the low-speed AD acquisition module 2 is ADC128S022, the model of the DA output module 7 is ACM9767, and the model of the current transformer module 5 is ZMCT103C.
The Digital-to-analog (DA) output module 7 is configured to generate a detection signal and send the detection signal to the arc fault generating module 12.
The fault arc generation module 12 is configured to generate a fault arc and generate a reflected signal when the detection signal encounters the fault arc.
The high-speed AD module 1 is configured to obtain a detection signal generated by the DA output module 7 and a reflection signal generated by the fault arc generation module 12, and the low-speed AD module 2 is configured to collect a current signal flowing through the fault arc generation module 12.
The isolation module 3 is connected to an external alternating current signal of 220V and 50HZ, and is used for isolating alternating current in the external alternating current signal, so that a detection signal generated by the DA output module 7 acquired by the high-speed AD acquisition module 1 can pass through the isolation module without obstruction, and a detection signal generated by the DA output module 7 can pass through the isolation module without obstruction.
As shown in fig. 3, the isolation module 3 includes a coupling transformer T11, a voltage-withstanding capacitor C12, and a transient suppression diode D13; two input ends of the coupling transformer T11 are directly connected with the signal input end IN, one end of the output of the coupling transformer T11 is connected to a power line through a voltage-resistant capacitor C12, and the other end of the output is directly connected with the power line; two output terminals of the coupling transformer T11 are connected to a transient suppression diode D13.
The current transformer module 5 is configured to convert a large current in an external ac signal into a small current, and transmit the converted external ac signal to the signal conditioning module 4.
The signal conditioning module 4 is configured to convert a current signal in the converted external ac signal into a voltage signal.
As shown in fig. 4, the signal conditioning module 4 includes a first operational amplifier U21, a second operational amplifier U22, a first resistor R23, a second resistor R24, a third resistor R25, a fourth resistor R26, a potentiometer R27, and a first capacitor C28. One end of the first resistor R23 is connected with one end of the second resistor R24 and the alternating current signal input end, and the other end is directly connected with the signal input grounding end; one end of the first capacitor C28 is connected to the other end of the second resistor R24 and the signal positive input end of the first operational amplifier U21, and the other end is connected to the signal input ground terminal; one end of the third resistor R25 is connected with the signal inverting input end of the first operational amplifier U21 and the signal output end of the first operational amplifier U21, and the other end of the third resistor R25 is connected to the signal positive input end of the second operational amplifier U22; one end of the fourth resistor R26 is connected to the signal inverting input terminal of the second operational amplifier U22 and the potentiometer R27, and the other end is connected to the ground terminal; the other end of the potentiometer R27 is connected to the signal output terminal of the second operational amplifier U22.
The fault arc positioning analysis module 9 is used for controlling the DA output module 7 to generate a detection signal, calculating the distance of the fault arc and the type of the fault arc by adopting a cross-correlation algorithm according to the detection signal and the reflection signal acquired by the high-speed AD acquisition module 1, and storing the distance and the type of the fault arc in a first Ring Buffer area (Ring Buffer 1) of a fault arc positioning Ring queue.
The fault arc detection and analysis module 10 is used for processing the current signals acquired by the low-speed AD acquisition module 2, calculating the distortion rate of the current signals through the pearson coefficient, and storing the distortion rate in a second Ring Buffer area (Ring Buffer 2) of the fault arc detection Ring queue.
The fusion analysis module 11 is configured to perform data fusion on the distance of the fault arc and the type of the fault arc obtained by the fault arc positioning analysis module 9, and the distortion rate of the current signal obtained by the fault arc detection analysis module 10, so as to determine whether a fault arc is generated, and when determining that a fault arc is generated, control the screen display module 8 to display a warning message, control the relay switch of the switch module 6 to be turned off, and notify the screen display module 8 to output the distance of the fault arc and the type of the fault arc.
As shown in fig. 2, the present invention further provides a working method of the apparatus for detecting and locating a fault arc in a commercial power environment, including the following steps:
(1) The DA output module 7 outputs a detection signal and transmits the emission signal to the fault arc generation module 12 through the isolation module 3;
(2) The fault arc generation module 12 generates a fault arc and generates a reflected signal when the detection signal encounters the fault arc;
(3) The low-speed AD collecting module 2 collects a current signal flowing through the fault arc generating module 12 through the current transformer module 5 and the signal conditioning module 4, and transmits the current signal to the fault arc detecting and analyzing module 10.
(4) The high-speed AD acquisition module 1 acquires a detection signal from the DA output module 7 and a reflection signal from the fault arc generation module 12 through the isolation module 3;
(5) The fault arc positioning and analyzing module 9 processes the detection signal and the reflection signal acquired by the high-speed AD acquisition module 1 by using a cross-correlation algorithm to obtain distance data D of the fault arc and type data Ty of the fault arc (namely, series arc or parallel arc);
(6) The arc fault location analysis module 9 stores the distance data D of the arc fault and the arc fault type data Ty in the first Ring Buffer (Ring Buffer 1) of the arc fault location circular queue, and the data in the first Ring Buffer (Ring Buffer 1) is read by the fusion analysis module.
(7) The fault arc detection and analysis module 10 processes the current signal flowing through the fault arc generation module 12 using the pearson coefficient algorithm to obtain a distortion rate Dr of the current signal.
(8) The arc fault detection and analysis module 10 stores the distortion rate Dr in the second Ring Buffer (Ring Buffer 2) of the arc fault detection circular queue, and the data in the second Ring Buffer (Ring Buffer 2) is read by the fusion analysis module.
(9) And the fusion analysis module 11 judges whether the total number of data in the first ring buffer area and the second ring buffer area is equal to W, if so, the step (10) is carried out, and if not, the step (1) is returned to.
In particular, W ranges between 30 and 100, preferably equal to 50 (i.e. 50 data per second).
(10) The fusion analysis module 11 reads W data in the first Ring Buffer (Ring Buffer 1) of the fault arc positioning Ring queue, where the data includes distance data D of the fault arc and fault arc type data Ty.
(11) The fusion analysis module 11 preprocesses W data in the first Ring Buffer (Ring Buffer 1), retains data from 0 to the length of the electric wire in the distance data of the fault arc, and filters out the rest distance data.
(12) The fusion analysis module 11 calculates the mean value of the distance data retained in step (11) and the divergence DI.
(13) The fusion analysis module 11 reads W current distortion rate data in the second Ring Buffer (Ring Buffer 2) of the fault arc detection Ring queue.
(14) The fusion analysis module 11 counts the number T of data with distortion rate exceeding a threshold in the data of the second Ring Buffer (Ring Buffer 2);
(15) And the fusion analysis module 11 judges whether the value of T is greater than or equal to Q1, if so, the fault arc exists, and then the step (16) is carried out, otherwise, the step (17) is carried out.
Specifically, Q1 has a value of 10 to 20, preferably 14.
(16) The fusion analysis module 11 controls the screen display module 8 to display the warning information, controls the relay switch of the switch module 6 to be switched off, controls the screen display module 8 to display the average value a of the distance of the fault arc and the type Ty of the fault arc, and ends the process.
(17) And the fusion analysis module 11 judges whether the distance divergence DI of the fault arc is greater than or equal to the distance divergence threshold TH, if so, the fault arc exists, then, the step (16) is returned, and otherwise, the step (18) is carried out.
Specifically, the distance divergence threshold TH ranges from 0.6 to 1.0, preferably 0.8.
(18) And the fusion analysis module 11 judges whether the data number T of the current distortion rate is less than or equal to Q2, if so, the fault arc does not exist, and then the step (19) is carried out, otherwise, the process is ended.
Specifically, Q2 has a value ranging from 5 to 15, preferably 9.
(19) The fusion analysis module 11 clears the system alarm, controls the relay switch of the switch module 6 to be closed, controls the screen display module 8 to display that no fault arc exists, and ends the process.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. A working method of a device for detecting and positioning a fault arc in a commercial power environment comprises a high-speed AD acquisition module, a low-speed AD acquisition module, an isolation module, a signal conditioning module, a current transformer module, a switch module, a DA output module, a screen display module, a fault arc positioning analysis module, a fault arc detection analysis module, a fusion analysis module and a fault arc generation module, wherein the DA output module is used for generating a detection signal and sending the detection signal to the fault arc generation module, the fault arc generation module is used for generating a fault arc and generating a reflection signal when the detection signal meets the fault arc, the high-speed AD acquisition module is used for acquiring the detection signal generated by the DA output module and the reflection signal generated by the fault arc generation module, the low-speed AD module is used for collecting a current signal flowing through the fault arc generation module, the isolation module is connected to an external alternating current signal and is used for isolating alternating current in the external alternating current signal so as to enable a detection signal collected by the high-speed AD collection module to pass through without obstruction and enable a detection signal generated by the DA output module to pass through without obstruction, the current transformer module is used for converting large current in the external alternating current signal into small current and transmitting the converted external alternating current signal to the signal conditioning module, the signal conditioning module is used for converting a current signal in the converted external alternating current signal into a voltage signal, the fault arc positioning analysis module is used for controlling the DA output module to generate the detection signal and calculating the distance of the fault arc and the type of the fault arc by adopting a cross-correlation algorithm according to the detection signal and a reflection signal collected by the high-speed AD collection module, the method comprises the following steps of storing a fault arc detection analysis module in a first annular buffer area of a fault arc positioning annular queue, processing a current signal acquired by a low-speed AD acquisition module, calculating a distortion rate of the current signal through a Pearson coefficient, storing the distortion rate in a second annular buffer area of the fault arc detection annular queue, performing data fusion on the distance of the fault arc and the type of the fault arc acquired by a fault arc positioning analysis module and the distortion rate of the current signal acquired by a fault arc detection analysis module to judge whether the fault arc is generated, controlling a screen display module to display warning information when judging that the fault arc is generated, controlling a relay switch of a switch module to be switched off, and informing the screen display module to output the distance of the fault arc and the type of the fault arc, and is characterized by comprising the following steps:
(1) The DA output module outputs a detection signal and transmits the detection signal to the fault arc generation module through the isolation module;
(2) The fault arc generation module generates a fault arc and generates a reflected signal when the detection signal meets the fault arc;
(3) The low-speed AD acquisition module acquires a current signal flowing through the fault arc generation module through the current transformer module and the signal conditioning module and transmits the current signal to the fault arc detection and analysis module;
(4) The high-speed AD acquisition module acquires a detection signal from the DA output module and a reflection signal from the fault arc generation module through the isolation module;
(5) The fault arc positioning analysis module processes the detection signal and the reflection signal acquired by the high-speed AD acquisition module by using a cross-correlation algorithm to obtain distance data D of the fault arc and type data Ty of the fault arc;
(6) The method comprises the following steps that a fault arc positioning analysis module stores distance data D and fault arc type data Ty of a fault arc in a first annular cache region of a fault arc positioning annular queue;
(7) The fault arc detection and analysis module processes a current signal flowing through the fault arc generation module by using a Pearson coefficient algorithm to obtain a distortion rate Dr of the current signal;
(8) The fault arc detection analysis module stores the distortion rate Dr in a second ring buffer area of the fault arc detection circular queue;
(9) The fusion analysis module judges whether the total number of data in the first annular cache region and the second annular cache region is equal to W, if so, the step (10) is carried out, otherwise, the step (1) is carried out;
(10) The method comprises the steps that a fusion analysis module reads W data in a first annular buffer area of a fault arc positioning annular queue, wherein the data comprises distance data D of fault arcs and fault arc type data Ty;
(11) The fusion analysis module is used for preprocessing the W data in the first annular cache region, reserving data from 0 to the length of the electric wire in the distance data of the fault electric arc, and filtering out the rest distance data;
(12) The fusion analysis module calculates the average value and the divergence DI of the distance data reserved in the step (11);
(13) The fusion analysis module reads W current distortion rate data in a second annular buffer area of the fault arc detection annular queue;
(14) The fusion analysis module counts the number T of data with distortion rate exceeding a threshold value in the data of the second annular buffer area;
(15) The fusion analysis module judges whether the value of T is larger than or equal to Q1, if so, the fault arc exists, then the step (16) is carried out, and if not, the step (17) is carried out;
(16) The fusion analysis module controls the screen display module to display warning information, controls a relay switch of the switch module to be switched off, controls the screen display module to display the average value A of the distance of the fault arc and the type Ty of the fault arc, and ends the process;
(17) The fusion analysis module judges whether the distance divergence DI of the fault arc is larger than or equal to a distance divergence threshold TH, if so, the fault arc exists, then the step (16) is returned, and if not, the step (18) is carried out;
(18) The fusion analysis module judges whether the data number T of the current distortion rate is less than or equal to Q2, if so, the fault arc does not exist, and then the step (19) is carried out, otherwise, the process is ended;
(19) The fusion analysis module clears the system alarm, controls the relay switch of the switch module to be closed, controls the screen display module to display that no fault arc exists, and ends the process.
2. The operating method of the device for detecting and locating the fault arc under the commercial power environment of claim 1, wherein the isolation module comprises a coupling transformer, a voltage-withstanding capacitor C and a transient suppression diode.
3. The working method of the device for detecting and locating the fault arc under the commercial power environment according to claim 2,
two input ends of the coupling transformer are directly connected with the signal input end;
one end of the output of the coupling transformer is connected to the power line through a voltage-resistant capacitor, and the other end of the output is directly connected with the power line;
two output ends of the coupling transformer are connected with the transient suppression diode.
4. The operating method of the device for detecting and locating the arc fault in the commercial power environment according to claim 3, wherein the signal conditioning module comprises a first operational amplifier, a second operational amplifier, a first resistor, a second resistor, a third resistor, a fourth resistor, a potentiometer and a first capacitor.
5. The working method of the device for detecting and locating the fault arc under the commercial power environment according to claim 4,
one end of the first resistor is connected with one end of the second resistor and the alternating current signal input end, and the other end of the first resistor is directly connected with the signal input grounding end;
one end of the first capacitor is connected with the other end of the second resistor and the signal positive input end of the first operational amplifier, and the other end of the first capacitor is connected to a signal input grounding end;
one end of the third resistor is connected with the signal inverting input end of the first operational amplifier and the signal output end of the first operational amplifier, and the other end of the third resistor is connected to the signal positive input end of the second operational amplifier;
one end of the fourth resistor is connected with the signal inverting input end of the second operational amplifier and the potentiometer, and the other end of the fourth resistor is connected to the grounding end;
the other end of the potentiometer is connected to the signal output end of the second operational amplifier.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3681268D1 (en) * | 1985-12-26 | 1991-10-10 | Aloka Co Ltd | ULTRASONIC DIAGNOSTIC DEVICE WORKING WITH DOPPLER EFFECT. |
| CN104316834A (en) * | 2014-10-16 | 2015-01-28 | 南京航空航天大学 | High-accuracy online cable fault detecting/locating device |
| CN108362981A (en) * | 2018-01-09 | 2018-08-03 | 复旦大学 | A kind of photovoltaic system DC Line Fault arc method for measuring that active/passive detection combines |
| CN108803560A (en) * | 2018-05-03 | 2018-11-13 | 南京航空航天大学 | Synthesization DC solid-state power controller and failure decision diagnostic method |
| CN109387746A (en) * | 2018-12-21 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of Arc Modelling bearing calibration based on Pearson's coefficient |
| CN113176479A (en) * | 2021-04-27 | 2021-07-27 | 山东科汇电力自动化股份有限公司 | Series arc detection method for low-voltage distribution network |
-
2021
- 2021-12-29 CN CN202111630831.3A patent/CN114325266B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3681268D1 (en) * | 1985-12-26 | 1991-10-10 | Aloka Co Ltd | ULTRASONIC DIAGNOSTIC DEVICE WORKING WITH DOPPLER EFFECT. |
| CN104316834A (en) * | 2014-10-16 | 2015-01-28 | 南京航空航天大学 | High-accuracy online cable fault detecting/locating device |
| CN108362981A (en) * | 2018-01-09 | 2018-08-03 | 复旦大学 | A kind of photovoltaic system DC Line Fault arc method for measuring that active/passive detection combines |
| CN108803560A (en) * | 2018-05-03 | 2018-11-13 | 南京航空航天大学 | Synthesization DC solid-state power controller and failure decision diagnostic method |
| CN109387746A (en) * | 2018-12-21 | 2019-02-26 | 云南电网有限责任公司电力科学研究院 | A kind of Arc Modelling bearing calibration based on Pearson's coefficient |
| CN113176479A (en) * | 2021-04-27 | 2021-07-27 | 山东科汇电力自动化股份有限公司 | Series arc detection method for low-voltage distribution network |
Non-Patent Citations (1)
| Title |
|---|
| 基于 SSTDR 的光伏系统直流母线电弧故障在线检测与定位;吴春华等;《中国电机工程学报》;20200420;全文 * |
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