CN117434470A - Electric leakage positioning device and method for circuit - Google Patents
Electric leakage positioning device and method for circuit Download PDFInfo
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- CN117434470A CN117434470A CN202311514570.8A CN202311514570A CN117434470A CN 117434470 A CN117434470 A CN 117434470A CN 202311514570 A CN202311514570 A CN 202311514570A CN 117434470 A CN117434470 A CN 117434470A
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- 238000001514 detection method Methods 0.000 claims abstract description 124
- 230000005611 electricity Effects 0.000 claims abstract description 39
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- 230000007935 neutral effect Effects 0.000 claims description 34
- 230000002159 abnormal effect Effects 0.000 claims description 31
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
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Abstract
The invention discloses a device and a method for positioning electric leakage of a circuit. Wherein, electric leakage positioner includes: the transformer detection device comprises a control module, a transformer detection module and a line detection module; the transformer detection module is electrically connected with the control module and is used for detecting whether a current signal exists in the transformer and inputting the current signal to the control module; the control module is in communication connection with the line detection module and is used for judging whether the transformer leaks electricity according to the current signal and outputting a line detection signal to the line detection module when the transformer leaks electricity so as to control the line detection module to detect the electric energy parameter of the corresponding line of the transformer. According to the technical scheme, the leakage positioning device is arranged in each transformer station area, and the transformer detection module and the line detection module are used for detecting which part of line segments of the transformer generate leakage, so that the leakage area is locked in time, the problem of large electric quantity loss caused by untimely line leakage overhaul is avoided, and the accuracy of line leakage positioning is improved.
Description
Technical Field
The invention relates to the field of power system detection, in particular to a device and a method for positioning electric leakage of a circuit.
Background
The distance that the circuit was erect outside the transformer platform district is farther and the environment is comparatively complicated, and the circuit often passes various branches interconnect, but in this kind of environment transformer and circuit are pricked by the metal easily, lead to the insulating skin to be destroyed, and then can cause the circuit electric leakage, influence the normal power supply of circuit.
In the prior art, the leakage monitoring of the transformer station area is only stopped on the transformer, namely, the leaked transformer can be positioned and identified, and then all lines of the station area are inspected and maintained by an maintainer. The method is long in time consumption, not only increases the overhaul difficulty of an overhaul worker, but also influences the timeliness of maintenance.
Disclosure of Invention
The invention provides a leakage positioning device and method for a circuit, which are used for solving the problem of untimely overhaul of personnel caused by inaccurate positioning of the leakage circuit in the prior art.
According to an aspect of the present invention, there is provided a leakage positioning device for a line, comprising:
the transformer detection device comprises a control module, a transformer detection module and a line detection module;
the transformer detection module is electrically connected with the control module and is used for detecting whether a current signal exists in the transformer and inputting the current signal to the control module;
the control module is in communication connection with the line detection module and is used for judging whether the transformer leaks electricity or not according to the current signal and outputting a line detection signal to the line detection module when the transformer leaks electricity so as to control the line detection module to detect the electric energy parameter of a corresponding line of the transformer; and judging the electric leakage line section according to the electric energy parameter.
Optionally, the transformer detection module includes: a current transformer unit and a signal transmission circuit;
the current transformer unit is arranged on a neutral line of the transformer and is electrically connected with the signal transmission circuit and used for generating a current signal when the transformer leaks electricity;
the signal transmission circuit is electrically connected with the control module and is used for inputting a current signal into the control module.
Optionally, the current transformer unit includes: a magnet and an induction coil;
the magnet is disposed about the neutral line, and the induction coil is disposed about the magnet and electrically connected to the signal transmission circuit.
Optionally, the signal transmission circuit includes: the device comprises a rectifier bridge, a unidirectional thyristor, a tripping coil and a tripping switch;
the input end of the rectifier bridge is connected with the output end of the current transformer, and the first output end of the rectifier bridge is connected with the gate electrode of the unidirectional thyristor;
the anode of the unidirectional thyristor is connected with the first input end of the tripping coil, and the cathode of the unidirectional thyristor is connected with the second input end of the tripping coil; the second input end of the tripping coil is also connected with the control module through a tripping switch.
Optionally, the line detection module includes: at least two electrical energy detection meters;
the electric energy detection meters are respectively arranged at different positions of the line and are used for measuring electric energy parameters of different line sections.
According to another aspect of the present invention, there is provided a leakage positioning method of a line, which is applied to a leakage positioning device, including:
acquiring a current signal;
judging whether the transformer leaks electricity or not according to the current signal;
if yes, outputting a line detection signal to a line detection module so as to control the line detection module to detect the electric energy parameters of the corresponding line of the transformer;
and judging the electric leakage line section according to the electric energy parameter.
Optionally, judging whether the transformer leaks electricity according to the current signal includes:
it is determined whether the current value in the current signal is 0.
Optionally, outputting the line detection signal to the line detection module includes:
acquiring an A-phase line power supply parameter, a B-phase line power supply parameter and a C-phase line power supply parameter of a corresponding transformer;
judging whether the A-phase line leaks electricity according to the A-phase line power supply parameter, judging whether the B-phase line leaks electricity according to the B-phase line power supply parameter, and judging whether the C-phase line leaks electricity according to the C-phase line power supply parameter;
when any one of the phase A line, the phase B line and the phase C line is leaked, a line detection signal of the corresponding line is output to the line detection module.
Optionally, judging whether the a-phase line leaks electricity according to the a-phase line power supply parameter, judging whether the B-phase line leaks electricity according to the B-phase line power supply parameter, and judging whether the C-phase line leaks electricity according to the C-phase line power supply parameter, including:
judging whether the phase A power supply parameter is in the standard power supply parameter range;
if yes, electric leakage is generated; if not, no electricity leakage occurs;
judging whether the B-phase line power supply parameter is in the standard power supply parameter range;
if yes, electric leakage is generated; if not, no electricity leakage occurs;
judging whether the power supply parameter of the C-phase line is in the standard power supply parameter range or not;
if yes, electric leakage is generated; if not, no electricity leakage occurs.
Optionally, the determining the line segment with electric leakage according to the electric energy parameter includes:
determining abnormal electric energy parameters according to the electric energy parameters;
and when the electric energy parameters of the ith line section to the (i+n) th line section are abnormal, judging that the leaked line section is the ith line section.
According to the technical scheme, the electric leakage positioning device is arranged in each transformer station area, so that the electric leakage condition of each transformer station area is detected in real time, the characteristics of a neutral line of a transformer are utilized to be combined with the transformer detection module, the electric leakage transformer is positioned in time, and when the transformer is in electric leakage, the line detection module is further used for detecting which part of line segments of the transformer are in electric leakage, so that the electric leakage area is locked in time, the problem of a large amount of electric quantity loss caused by untimely line electric leakage overhaul is avoided, and the accuracy of line electric leakage positioning and the timeliness of personnel overhaul are improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a leakage positioning device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a transformer detection module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a line detection module according to an embodiment of the present invention;
fig. 4 is a flowchart of a first leakage positioning method according to an embodiment of the present invention;
FIG. 5 is a flowchart of a second leakage localization method according to an embodiment of the present invention;
fig. 6 is a flowchart of a third leakage positioning method according to an embodiment of the present invention;
fig. 7 is a flowchart of a fourth leakage positioning method according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein.
Fig. 1 is a schematic structural diagram of a leakage positioning device according to an embodiment of the present invention. As shown in fig. 1, the leakage positioning device of the circuit includes:
a control module 13, a transformer detection module 11 and a line detection module 12;
the transformer detection module 11 is electrically connected with the control module 13 and is used for detecting whether a current signal exists in the transformer and inputting the current signal to the control module 13;
the control module 13 is in communication connection with the line detection module 12, and is used for judging whether the transformer leaks electricity according to the current signal and outputting a line detection signal to the line detection module 12 when the transformer leaks electricity so as to control the line detection module 12 to detect the electric energy parameter of the corresponding line of the transformer; and judging the electric leakage line section according to the electric energy parameter.
The transformer detection module 11 is used for detecting whether the transformer has leakage abnormality or not. In an electrical power system, a bay refers to the area and region of a transformer supply. Each transformer area may include a transformer detection module 11 to detect whether a transformer has an abnormal leakage in real time. The transformer detection module 11 may be disposed on a neutral line of the transformer, and a sum of vectors of currents flowing through the neutral line of the transformer is zero when the transformer is normally operated; when the transformer has abnormal leakage, the sum of current vectors on the neutral line of the transformer is not zero, the transformer detection module 11 is arranged on the neutral line by utilizing the property of the neutral line, and when the existence of current signals on the neutral line of the transformer is monitored, the existence of abnormal leakage of the transformer is indicated, so that the control module 13 outputs line detection signals to the line detection module 12 so as to detect all lines of the leaked transformer.
The line detection module 12 is configured to detect an electric leakage condition of a corresponding line in the transformer, so as to locate the transformer electric leakage to a line segment on the transformer. The line detection module 12 may include a power meter that provides power parameters including current, ground voltage, and power parameters on each line segment on the detection line segment. Because the voltage drop of the leaked line to the ground can be reduced and the power can be increased, the specific leaked line section can be judged by judging the electric energy parameter of each line section.
Specifically, whether a current signal exists on the neutral line of the transformer is detected by the transformer detection module 11, when the current signal exists on the neutral line of the transformer, the current signal is input into the control module 13 through the transformer detection module 11, the control module 13 further judges that the transformer is abnormal in leakage and outputs a line detection signal to the line detection module 12, the line detection module 12 detects the electric energy parameter of the line of the leaked transformer, and the control module 13 further locates the line section of the leakage according to the electric energy parameter.
According to the technical scheme, the electric leakage positioning device is arranged in each transformer station area, so that the electric leakage condition of each transformer station area is detected in real time, the characteristics of the neutral line of the transformer are combined with the transformer detection module, the electric leakage transformer is positioned in time, and when the transformer is in electric leakage, the line detection module is used for detecting which part of the line segment of the transformer is in electric leakage, so that the electric leakage area is locked in time, the problem of a large amount of electric quantity loss caused by untimely line electric leakage overhaul is avoided, and the accuracy of line electric leakage positioning and the timeliness of personnel overhaul are improved.
Optionally, fig. 2 is a schematic structural diagram of a transformer detection module according to an embodiment of the present invention, and as shown in fig. 1 and fig. 2, the transformer detection module 11 includes: a current transformer unit 111 and a signal transmission circuit 112;
the current transformer unit 111 is disposed on the neutral line 4 of the transformer and electrically connected to the signal transmission circuit 112, for generating a current signal when the transformer leaks electricity;
the signal transmission circuit 112 is electrically connected to the control module 13, and is used for inputting a current signal into the control module 13.
The current transformer 111 may be used to sense the induced current signal on the neutral line 4. When the transformer has abnormal leakage, the vector sum of the currents of the neutral line 4 is not 0, the current on the neutral line 4 generates an induced magnetic field in the area where the current transformer 111 is located, the current transformer 111 generates a current signal according to the induced magnetic field of the current on the neutral line 4, and the current signal is transmitted to the signal transmission circuit 112.
In some embodiments, the current transformer unit 111 includes: a magnet 1111 and an induction coil 1112; a magnet 1111 is disposed around the neutral line 4, and an induction coil 1112 is disposed around the magnet 1111 and electrically connected to the signal transmission circuit 112. The induction coil 1112 generates a current signal by an induction magnetic field around the magnet 1111, and transmits the current signal to the signal transmission circuit 112, so as to detect the neutral line 4.
It will be appreciated that in the absence of an induced magnetic field on the neutral line 4, there is no current signal present in the signal transmission circuit 112.
According to the technical scheme, the current transformer unit and the signal transmission circuit are arranged in the transformer detection module, the current flowing through the neutral line is detected in real time through the current transformer unit, the current is used as the condition for judging the leakage of the transformer, and the current signal is transmitted to the control module through the signal transmission circuit in time when the transformer leaks, so that the timeliness of line leakage detection is guaranteed.
Optionally, with continued reference to fig. 2, the signal transmission circuit 112 includes: a rectifier bridge 1121, unidirectional thyristors 1122, trip coils 1123, and trip switches 1124;
an input end of the rectifier bridge 1121 is connected with an output end of the current transformer, and a first output end of the rectifier bridge 1121 is connected with a gate electrode of the unidirectional thyristor 1122;
the anode of the unidirectional thyristor 1122 is connected with the first input end of the tripping coil 1123, and the cathode of the unidirectional thyristor 1122 is connected with the second input end of the tripping coil 1123; the second input of trip coil 1123 is also connected to control module 13 via a trip switch 1124.
The rectifier bridge 1121 is configured to convert an ac current signal into a dc current signal; the unidirectional thyristor 11221122 is used for being turned on when a current signal exists in the signal transmission circuit 112 and turned off when the current signal does not exist, so that the accuracy of current signal transmission is ensured; the trip coil 1123 is configured to control the second input of the armature actuation control trip coil 1123 in the trip coil 1123 to communicate with the control module 13 when a current signal is present in the coil to control the current signal to enter the control module 13.
Specifically, two ends of an induction coil in the current transformer unit 111 are respectively connected with two input ends of the rectifier bridge 1121, so that an alternating current signal enters the rectifier bridge 1121 and is changed into a direct current signal through the action of the rectifier bridge 1121 to be output from two output ends of the rectifier bridge 1121; when a current signal flows into the gate electrode, the unidirectional thyristor 1122 is triggered to be turned on, the current signal can flow into the tripping coil 1123 through the unidirectional thyristor 1122, the tripping coil 1123 is electrified to be attracted, the tripping switch 1124 is closed, the path of the control module 13 and the tripping coil 1123 is communicated, and the current signal enters the control module 13 through the tripping switch 1124.
It will be appreciated that when no induced magnetic field is present on the neutral line 4, no current is present in the signal transmission circuit 112, the unidirectional thyristor 1122 is not on and is in an off state, the armature in the trip coil 1123 is not engaged, and the trip switch 1124 is turned off.
According to the technical scheme, the rectifier bridge, the unidirectional thyristor, the tripping coil and the tripping switch are arranged in the signal transmission circuit, so that the signal transmission current can be conducted only when the electric leakage is abnormal, the current signal is transmitted to the control module, and the accuracy of current signal detection is further improved.
Optionally, fig. 3 is a schematic structural diagram of a line detection module according to an embodiment of the present invention, and in conjunction with fig. 3 and fig. 1, the line detection module 12 includes: at least two electric energy detection meters 121;
the power detection meters 121 are respectively disposed at different positions of the line for measuring power parameters of different line sections.
The electric energy detection meter 121 is arranged on a circuit corresponding to the transformer and is used for detecting electric energy parameters on the circuit. The at least two electric energy detection meters 121 are respectively arranged at different positions of the line to obtain electric energy parameters of different line sections, so that more accurate positioning of leakage abnormality is realized.
For example, the line detection module 12 includes eight electric energy detection meters 121, each electric energy detection meter 121 can detect the electric energy parameter of the A, B, C three-phase line and the electric energy parameter of the zero line, and the line of the transformer includes four electric poles, and the corresponding electric energy detection meters 121 are set at two ends of each electric pole, so that the line section is divided into five sections, namely, a transformer-first electric pole line section, a first electric pole-second electric pole line section, a second electric pole-third electric pole line section, a third electric pole-fourth electric pole line section and a fourth electric pole subsequent line section. Correspondingly, the line detection module 12 detects that the power parameters of the line segments include the power parameters of all the line segments. When the electric energy parameters of the line sections of the second electric pole and the third electric pole, the third electric pole and the fourth electric pole are abnormal and the electric energy parameters of the transformer, the first electric pole and the second electric pole are normal, the electric leakage abnormality exists in the line sections of the second electric pole and the third electric pole.
It will be appreciated that the number of the power meters 121 may be determined according to positioning accuracy, which is not limited in the embodiment of the present invention.
In some embodiments, the control module includes a digital-to-analog conversion unit, a display unit, and an early warning unit. The digital-to-analog conversion unit can convert the analog quantity of the current signal into digital quantity and transmit the digital quantity to the display unit, and the display unit displays leakage information so as to remind power inspection personnel of abnormal leakage of the transformer; the early warning unit can be used for sending early warning information to an maintainer after receiving the current signal so as to remind the maintainer to overhaul as soon as possible, and the operation of the power system is prevented from being influenced.
Based on the same inventive concept, fig. 4 is a flowchart of a first leakage positioning method according to an embodiment of the present invention, and as shown in fig. 1, fig. 2, fig. 3, and fig. 4, the embodiment of the present invention further provides a leakage positioning method for a circuit, where the method is applied in a leakage positioning device, and includes:
s10, acquiring a current signal.
Wherein the current signal on the neutral line 4 can be acquired from the transformer detection module 11. The transformer detection module 11 is electrically connected with the control module 13, the transformer detection module 11 is arranged on the neutral line 4 of the transformer, and the sum of current vectors flowing through the neutral line 4 of the transformer is zero when the transformer normally operates; when the transformer has abnormal leakage, the sum of current vectors on the neutral line 4 of the transformer is not zero, and when the current signal on the neutral line 4 of the transformer is monitored, the condition that the transformer has abnormal leakage at the moment is indicated, and then the current signal is input into the control module 13.
S11, judging whether the transformer leaks electricity or not according to the current signal.
When a current signal exists in the control module 13, the sum of current vectors on the neutral line 4 of the transformer is not zero, which indicates that the transformer has abnormal leakage at the moment; when no current signal exists in the control module 13, the sum of current vectors on the neutral line 4 of the transformer is zero, which indicates that no leakage abnormality exists in the transformer at the moment.
In some embodiments, it may be determined whether the current value in the current signal is 0, and thus whether the transformer has a leakage abnormality. The current value in the current signal can represent the vector sum of the currents on the neutral line 4 of the transformer, and when the vector sum is not 0, the current signal which is not 0 exists at the moment is indicated, and then the abnormal leakage of the transformer is indicated; when the vector sum is 0, the current value of the current signal is also 0, which indicates that the transformer has no leakage abnormality.
And S12, if yes, outputting a line detection signal to a line detection module so as to control the line detection module to detect the electric energy parameter of the corresponding line of the transformer.
The line detection module 12 is configured to detect an electric leakage condition of a corresponding line in the transformer, so as to locate the transformer electric leakage to a line segment on the transformer. The line detection module 12 may include a power meter 121, where the power meter 121 is configured to measure power parameters including current parameters, ground voltage and power parameters on the line segments of the line segments.
S13, judging the electric leakage line section according to the electric energy parameters.
The voltage drop of the leaked line to the ground is reduced, and the power is increased, so that the specific leaked line section can be judged by judging the electric energy parameter of each line section.
Specifically, the transformer detection module 11 detects whether a current signal exists on the neutral line 4 of the transformer, when the current signal exists on the neutral line 4 of the transformer, the current signal is input into the control module 13 through the transformer detection module 11, the control module 13 further judges that the transformer is abnormal in leakage and outputs a line detection signal to the line detection module 12, the line detection module 12 detects the electric energy parameter of the line of the leaked transformer, and the control module 13 further positions the line section of the leakage according to the electric energy parameter.
According to the technical scheme provided by the embodiment of the invention, whether the transformer has abnormal electric leakage is judged according to the current signal by acquiring the current signal, and when the transformer has abnormal electric leakage, the circuit detection signal is output so that the circuit detection module detects which part of the line segment of the transformer has electric leakage, thereby locking the electric leakage area in time, avoiding the problem of great quantity of electric quantity loss caused by untimely circuit electric leakage overhaul, and improving the circuit electric leakage positioning accuracy and the timeliness of personnel overhaul.
On the basis of the above embodiment, fig. 5 is a flowchart of a second leakage positioning method according to an embodiment of the present invention, and in combination with fig. 1, fig. 2, fig. 3 and fig. 5, the method includes:
s20, acquiring a current signal.
S21, judging whether the transformer leaks electricity or not according to the current signal.
And S22, if yes, acquiring the A-phase line power supply parameter, the B-phase line power supply parameter and the C-phase line power supply parameter of the corresponding transformer.
When detecting that the corresponding transformer has electric leakage abnormality, the transformer can firstly confirm whether the power supply parameters of the phase lines are abnormal according to the power supply parameters of the phase A line, the power supply parameters of the phase B line and the power supply parameters of the phase C line.
S22, judging whether the A-phase line leaks electricity according to the A-phase line power supply parameter, judging whether the B-phase line leaks electricity according to the B-phase line power supply parameter, and judging whether the C-phase line leaks electricity according to the C-phase line power supply parameter.
When the corresponding line leaks electricity, the power in the line power supply parameter is suddenly increased, the current is increased, the voltage drop to the ground is reduced, and the abnormality of the leakage of the line in the phase A, the phase B and the phase C is judged by the power supply parameter in the phase A.
And S24, outputting a line detection signal of a corresponding line to the line detection module when any one of the phase A line, the phase B line and the phase C line is leaked.
S25, judging the electric leakage line section according to the electric energy parameters.
For example, assuming that the a-phase line has an abnormal leakage, first, the a-phase line power supply parameter, the B-phase line power supply parameter and the C-phase line power supply parameter of the corresponding transformer are obtained, the power in the a-phase line power supply parameter is suddenly increased, the current is increased and the voltage drop to the ground is reduced according to the a-phase line power supply parameter, the B-phase line power supply parameters are normal, and according to the C-phase line power supply parameters, it is indicated that the a-phase line has an abnormal leakage at this time and a detection signal of the a-phase line is output to the line detection module 12, so that the line detection module 12 detects the leakage area of the a-phase line segment.
According to the technical scheme provided by the embodiment of the invention, the power supply parameters of the corresponding transformer phases are obtained, the leakage condition of each phase is judged according to the power supply parameters of each phase, and the accurate positioning of the abnormal leakage of the transformer circuit is realized by positioning the leakage condition of the corresponding circuit first and further positioning the leakage condition of the corresponding circuit section.
On the basis of the above embodiment, fig. 6 is a flowchart of a third leakage positioning method according to an embodiment of the present invention, and in combination with fig. 1, fig. 2, fig. 3 and fig. 6, the method includes:
s30, acquiring a current signal.
S31, judging whether the transformer leaks electricity or not according to the current signal.
And S32, if yes, acquiring the A-phase line power supply parameter, the B-phase line power supply parameter and the C-phase line power supply parameter of the corresponding transformer.
S33, judging whether the A-phase line power supply parameter is in the standard power supply parameter range;
if yes, electric leakage is generated; if not, no electricity leakage occurs;
judging whether the B-phase line power supply parameter is in the standard power supply parameter range;
if yes, electric leakage is generated; if not, no electricity leakage occurs;
judging whether the power supply parameter of the C-phase line is in the standard power supply parameter range or not;
if yes, electric leakage is generated; if not, no electricity leakage occurs.
The standard power supply parameter range may be a parameter range of each phase when the line normally operates, and includes a standard power parameter range, a standard current parameter range and a standard ground voltage parameter range, when the line has a leakage fault, the power parameter may be increased, the current parameter may be increased, and the ground voltage parameter may be decreased.
And S33, outputting a line detection signal of a corresponding line to the line detection module when any one of the phase A line, the phase B line and the phase C line is leaked.
S35, judging the electric leakage line section according to the electric energy parameters.
On the basis of the above embodiment, fig. 7 is a flowchart of a fourth leakage positioning method according to an embodiment of the present invention, and in combination with fig. 1, fig. 2, fig. 3 and fig. 7, the method includes:
s40, acquiring a current signal.
S41, judging whether the transformer leaks electricity or not according to the current signal.
And S42, if yes, outputting a line detection signal to the line detection module so as to control the line detection module to detect the electric energy parameter of the corresponding line of the transformer.
S43, determining abnormal electric energy parameters according to the electric energy parameters.
The abnormal electric energy parameters can be power parameters, current parameters and parameters for reducing ground voltage drop, when the electric leakage abnormality exists in the line section, the power parameters are increased, the current parameters are increased, the ground voltage drop parameters are reduced, the abnormal electric energy parameters can be identified, and the line section corresponding to the abnormal electric energy parameters can be positioned.
S44, when the electric energy parameters of the ith line section to the electric energy parameters of the (i+n) th line section are abnormal, judging that the leaked line section is the ith line section.
Illustratively, the insulation cover of the A-phase line No. three bar breaks, resulting in electrical leakage from the external line. The line detection module 12 includes eight electric energy detection meters 121, each electric energy detection meter 121 can detect the electric energy parameter of A, B, C three-phase line and the electric energy parameter of zero line, and the line of the transformer includes four electric poles, and corresponding electric energy detection meters 121 are all arranged at two ends of each electric pole, so that the line section is divided into five sections, namely a transformer-first electric pole line section, a first electric pole-second electric pole line section, a second electric pole-third electric pole line section, a third electric pole-fourth electric pole line section and a fourth electric pole subsequent line section. And obtaining electric energy parameters of the A-phase line, the B-phase line and the C-phase line, comparing the electric energy parameters of the A-phase line, the B-phase line and the C-phase line with standard power supply parameter ranges, obtaining that the power parameter, the current parameter and the ground voltage drop parameter of the A-phase line are not in the standard power supply parameter ranges, and judging that the leakage abnormality exists in the A-phase line. Outputting a line detection signal of the A-phase line, obtaining electric energy parameters of each line section of the A-phase line, and when the electric energy parameters of the line sections of the second electric pole-third electric pole line section, the third electric pole-fourth electric pole line section and the fourth electric pole later are abnormal and the electric energy parameters of the transformer-first electric pole line section and the first electric pole-second electric pole line section are normal, indicating that the electric leakage abnormality exists in the second electric pole-third electric pole line section.
It will be appreciated that the presence of an electrical leakage anomaly in a line segment may also affect the power delivery after that line segment, and thus the power parameters of the line segment and the line following that line segment.
According to the technical scheme provided by the embodiment of the invention, whether the transformer has abnormal electric leakage is judged according to the current signal by acquiring the current signal, and when the transformer has abnormal electric leakage, the circuit detection signal is output so that the circuit detection module detects which part of the line segment of the transformer has electric leakage, thereby locking the electric leakage area in time, avoiding the problem of great quantity of electric quantity loss caused by untimely circuit electric leakage overhaul, and improving the circuit electric leakage positioning accuracy and the timeliness of personnel overhaul.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (10)
1. A leakage locator for a circuit, comprising:
the transformer detection device comprises a control module, a transformer detection module and a line detection module;
the transformer detection module is electrically connected with the control module and is used for detecting whether a current signal exists in the transformer or not and inputting the current signal to the control module;
the control module is in communication connection with the line detection module and is used for judging whether the transformer is leaked or not according to the current signal and outputting a line detection signal to the line detection module when the transformer is leaked so as to control the line detection module to detect the electric energy parameter of a line corresponding to the transformer; and judging the electric leakage line section according to the electric energy parameter.
2. The leakage locator device of claim 1, wherein the transformer detection module comprises: a current transformer unit and a signal transmission circuit;
the current transformer unit is arranged on a neutral line of the transformer and is electrically connected with the signal transmission circuit and is used for generating a current signal when the transformer leaks electricity;
the signal transmission circuit is electrically connected with the control module and is used for inputting the current signal into the control module.
3. The leakage locator device according to claim 2, wherein the current transformer unit comprises: a magnet and an induction coil;
the magnet is disposed about the neutral line, and the induction coil is disposed about the magnet and electrically connected to the signal transmission circuit.
4. The leakage locator device of claim 2, wherein the signal transmission circuit comprises: the device comprises a rectifier bridge, a unidirectional thyristor, a tripping coil and a tripping switch;
the input end of the rectifier bridge is connected with the output end of the current transformer, and the first output end of the rectifier bridge is connected with the gate electrode of the unidirectional thyristor;
the anode of the unidirectional thyristor is connected with the first input end of the tripping coil, and the cathode of the unidirectional thyristor is connected with the second input end of the tripping coil; the second input end of the tripping coil is also connected with the control module through the tripping switch.
5. The electrical leakage positioning device of claim 1, wherein the line detection module comprises: at least two electrical energy detection meters;
the electric energy detection meters are respectively arranged at different positions on the line and are used for measuring electric energy parameters of different line sections.
6. A method for positioning leakage of a circuit, which is applied to the leakage positioning device according to any one of claims 1 to 5, and comprises the steps of:
acquiring a current signal;
judging whether the transformer leaks electricity or not according to the current signal;
if yes, outputting a line detection signal to a line detection module so as to control the line detection module to detect the electric energy parameter of the corresponding line of the transformer;
and judging the electric leakage line section according to the electric energy parameter.
7. The leakage localization method of claim 6, wherein determining whether the transformer is leaking based on the current signal comprises:
and judging whether the current value in the current signal is 0.
8. The leakage localization method of claim 6, wherein outputting the line detection signal to the line detection module comprises:
acquiring an A-phase line power supply parameter, a B-phase line power supply parameter and a C-phase line power supply parameter corresponding to the transformer;
judging whether an A-phase line leaks electricity according to the A-phase line power supply parameter, judging whether a B-phase line leaks electricity according to the B-phase line power supply parameter, and judging whether a C-phase line leaks electricity according to the C-phase line power supply parameter;
and when any one of the phase A line, the phase B line and the phase C line leaks electricity, outputting a line detection signal of the corresponding line to a line detection module.
9. The electrical leakage positioning method according to claim 8, wherein determining whether the a-phase line is electrically leaked based on the a-phase line power supply parameter, determining whether the B-phase line is electrically leaked based on the B-phase line power supply parameter, and determining whether the C-phase line is electrically leaked based on the C-phase line power supply parameter, comprises:
judging whether the A-phase line power supply parameter is in a standard power supply parameter range or not;
if yes, electric leakage is generated; if not, no electricity leakage occurs;
judging whether the B-phase line power supply parameter is in a standard power supply parameter range or not;
if yes, electric leakage is generated; if not, no electricity leakage occurs;
judging whether the C-phase line power supply parameter is in a standard power supply parameter range or not;
if yes, electric leakage is generated; if not, no electricity leakage occurs.
10. The leakage localization method of claim 6, wherein determining the line segment of the leakage based on the electrical energy parameter comprises:
determining abnormal electric energy parameters according to the electric energy parameters;
and when the electric energy parameters of the ith line section to the (i+n) th line section are abnormal, judging that the electric leakage line section is the ith line section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311514570.8A CN117434470A (en) | 2023-11-14 | 2023-11-14 | Electric leakage positioning device and method for circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311514570.8A CN117434470A (en) | 2023-11-14 | 2023-11-14 | Electric leakage positioning device and method for circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117434470A true CN117434470A (en) | 2024-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311514570.8A Pending CN117434470A (en) | 2023-11-14 | 2023-11-14 | Electric leakage positioning device and method for circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117434470A (en) |
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2023
- 2023-11-14 CN CN202311514570.8A patent/CN117434470A/en active Pending
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