CN212540586U - Insulation fault positioning system for ungrounded system - Google Patents
Insulation fault positioning system for ungrounded system Download PDFInfo
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- CN212540586U CN212540586U CN202020796909.3U CN202020796909U CN212540586U CN 212540586 U CN212540586 U CN 212540586U CN 202020796909 U CN202020796909 U CN 202020796909U CN 212540586 U CN212540586 U CN 212540586U
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Abstract
The utility model relates to an insulation fault positioning system for ungrounded system, including monitoring module, signal generation module and fault location module, monitoring module and signal generation module link to each other with ungrounded system respectively, and signal generation module and fault location module still link to each other with monitoring module respectively, and fault location module links to each other with each load branch road, realizes the insulation fault location to each load branch road. Compared with the prior art, the utility model has the advantages of realize the insulation fault location and the insulation fault real-time supervision and the warning of each load branch road.
Description
Technical Field
The utility model belongs to the technical field of insulation fault location technique and specifically relates to an insulation fault location system for ungrounded system is related to.
Background
Ungrounded systems have the advantage of operating with faults and are therefore widely used in applications where high demands are made on the reliability and continuity of the power supply. In these occasions, corresponding equipment is often needed to monitor the insulation resistance of the system, so that when an insulation fault occurs, a worker can timely troubleshoot the fault and prevent other phases from generating the insulation fault, thereby causing system power failure and influencing the reliability of an ungrounded system.
However, in some large-scale systems, the branch circuits are complex, when an insulation fault occurs, manual troubleshooting is long, and the risk of unstable operation of the system is increased, or in an ungrounded system which operates for a long time, the insulation level of a lead of the system is reduced, after the insulation fault occurs, the voltage to ground of a non-fault phase is increased, secondary grounding is easily caused after long-time operation, and the risk of unstable operation of the system is also increased. Currently, there are some insulation fault locating systems in the prior art, for example, chinese patent CN103033722A discloses an insulation fault locating apparatus for insulation locating in an ungrounded power supply network, which can locate an insulation fault. However, the insulation fault locator in the patent places the transformer in the power supply loop, and the location of the line fault cannot be specifically to the branch circuit for supplying power to the load.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an insulation fault positioning system who is used for ungrounded system who realizes the insulation fault location and the insulation fault real-time supervision of each load branch road and reports to the police in order to overcome the defect that above-mentioned prior art exists.
The purpose of the utility model can be realized through the following technical scheme:
an insulation fault positioning system for an ungrounded system comprises a monitoring module, a signal generating module and a fault positioning module; the monitoring module and the signal generating module are respectively connected with an ungrounded system; the signal generation module and the fault positioning module are also respectively connected with the monitoring module; and the fault positioning module is connected with each load branch circuit to realize the insulation fault positioning of each load branch circuit.
Preferably, the monitoring module comprises a processor, an insulation resistance measuring unit, a display unit, a fault indication unit and a first power supply; the insulation resistance measuring unit, the display unit and the fault indicating unit are respectively connected with the processor; the processor, the insulation resistance measuring unit, the display unit and the fault indicating unit are respectively connected with the first power supply.
More preferably, the insulation resistance measuring unit is an insulation resistance measuring instrument.
More preferably, the display unit is an LED display screen.
More preferably, the fault indication unit comprises an insulation fault alarm and early warning indicator lamp and a PE and KE terminal disconnection fault indicator lamp; and the insulation fault alarm and early warning indicator lamp and the PE and KE terminal disconnection fault indicator lamp are respectively connected with the processor.
Preferably, the signal generating module comprises a second power supply, a voltage measuring unit and a signal generating unit; the signal generating unit is connected with a second power supply; the voltage measuring unit and the signal generating unit are respectively connected with a non-grounding system.
More preferably, the voltage measuring unit comprises a coupling resistor, a sampling resistor and an operational amplifier; one end of the coupling resistor is connected with the ungrounded system, and the other end of the coupling resistor is connected with the sampling resistor; the other end of the sampling resistor is grounded; the input end of the operational amplifier is connected with the sampling resistor, and the output end of the operational amplifier is connected with the processor.
More preferably, the signal generating unit is a signal generator.
Preferably, the fault location module comprises a third power supply, a plurality of metering type current transformers and a fault analysis unit; the metering current transformer and the fault analysis unit are respectively connected with a third power supply; the current transformers are respectively connected with the load branch.
Preferably, the fault positioning system is provided with a communication module; the monitoring module carries out information interaction with the signal generating module and the fault positioning module through the communication module.
Compared with the prior art, the utility model has the advantages of it is following:
firstly, realizing the insulation fault positioning of each load branch: the utility model provides an insulation fault positioning system has all installed the current transformer who is used for gathering positioning signal on each load branch road of ungrounded system, and the signal of gathering confirms the trouble branch road after the analysis of failure analysis unit, realizes the fault location to the load branch road.
Secondly, realizing real-time monitoring and alarming of insulation faults: the utility model provides an insulation fault positioning system sets up insulating monitoring module for information such as insulation resistance, fault state and concrete trouble branch road to ungrounded system carries out the full-time monitoring.
Drawings
Fig. 1 is a schematic structural diagram of a middle insulation fault positioning system according to the present invention;
fig. 2 is a schematic structural diagram of an insulation fault locating system according to an embodiment of the present invention.
The reference numbers in the figures indicate:
1. the device comprises a monitoring module, 2, a signal generation module, 3, a fault positioning module, 4, a communication module, 101, a processor, 102, an insulation resistance measuring unit, 103, a display unit, 104, a fault indication unit, 105, a first power supply, 201, a second power supply, 202, a voltage measuring unit, 203, a signal generation unit, 301, a third power supply, 302, a current transformer, 303 and a fault analysis unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.
An insulation fault locating system for an ungrounded system is structurally shown in fig. 1 and 2 and comprises a monitoring module 1, a signal generating module 2 and a fault locating module 3. The monitoring module 1 and the signal generating module 2 are respectively connected with an ungrounded system, and the signal generating module 2 and the fault positioning module 3 are also respectively connected with the monitoring module 1. The fault location module 3 is connected with each load branch through the current transformer 302, and realizes fault location of the load branches by collecting location signals of each loop.
The modules are described in detail as follows:
the monitoring module 1: including a processor 101, an insulation resistance measurement unit 102, a display unit 103, a fault indication unit 104, and a first power supply 105. The insulation resistance measuring unit 102, the display unit 103, and the fault indicating unit 104 are connected to the processor 101, respectively, and the processor 101, the insulation resistance measuring unit 102, the display unit 103, and the fault indicating unit 104 are connected to the first power supply 105, respectively.
The insulation resistance measuring unit 102 in this embodiment is an insulation resistance measuring instrument, and the model is ancori AIM-T500L. The display unit 103 is an LED display screen.
The fault indication unit comprises an insulation fault alarm and early warning indicator lamp and PE and KE terminal disconnection fault indicator lamps, is respectively connected with the processor 101, and is powered by the first power supply 105.
The monitoring module 1 has a function of monitoring the insulation resistance of the ungrounded system in real time, when an insulation fault occurs, a starting command is sent to control the operation of the generating module 2 and the fault locating module 3, and after the fault locating module 3 locates a fault branch, the monitoring module 1 receives information sent by the fault locating module 3 through the communication module 4 and displays the information on the display unit 103.
The signal generation module 2: the device comprises a second power supply 201, a voltage measuring unit 202 and a signal generating unit 203, wherein the voltage measuring unit 202 and the signal generating unit 203 are respectively connected with the second power supply 201.
The voltage measuring unit 202 in this embodiment includes a coupling resistor, a sampling resistor, and an operational amplifier, where one end of the coupling resistor is connected to the ungrounded system, the other end of the coupling resistor is connected to the sampling resistor, the other end of the sampling resistor is grounded, an input end of the operational amplifier is connected to the sampling resistor, and an output end of the operational amplifier is connected to the processor 101.
The signal generating unit 203 in this embodiment is a signal generator.
The signal generating module 2 starts to work after receiving the starting information of the monitoring module 1, judges which specific phase of the ungrounded system has the insulation fault, sends the information to the monitoring module 1 through the communication module 4, starts the second power supply 201, further starts the signal generating unit 203, and injects a positioning signal into the fault phase.
And a fault positioning module 3: the device comprises a third power supply 301, a metering type current transformer 302 and a fault analysis unit 303, wherein the current transformer 302 and the fault analysis unit 303 are respectively connected with the third power supply 301. In this embodiment, each load branch is provided with a current transformer 302 for collecting a positioning signal of each load branch to realize fault positioning of each load branch.
The current transformer 302 is an ancorui AKH-0.66/G metering type current transformer, and parameters such as voltage, current, frequency and the like obtained by sampling can be transmitted to other equipment through a communication interface.
The fault analysis unit 303 is specifically an insulation fault locator, and may analyze a current signal acquired by the current transformer 302 to determine a branch with an insulation fault.
The fault locating module 3 starts to work after receiving the starting information of the monitoring module 1, collects the locating signal sent by the signal generating module 2 through the current transformer 302, thereby judging the specific branch with the fault, and sends the information to the monitoring module 1 through the communication module 4. After receiving the information, the monitoring module 1 controls the fault indication unit 104 to perform fault indication.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An insulation fault locating system for an ungrounded system, characterized in that the fault locating system comprises a monitoring module (1), a signal generating module (2) and a fault locating module (3); the monitoring module (1) and the signal generating module (2) are respectively connected with an ungrounded system; the signal generation module (2) and the fault positioning module (3) are also respectively connected with the monitoring module (1); and the fault positioning module (3) is connected with each load branch circuit to realize the insulation fault positioning of each load branch circuit.
2. An insulation fault location system for an ungrounded system according to claim 1, characterized in that said monitoring module (1) comprises a processor (101), an insulation resistance measuring unit (102), a display unit (103), a fault indication unit (104) and a first power supply (105); the insulation resistance measuring unit (102), the display unit (103) and the fault indicating unit (104) are respectively connected with the processor (101); the processor (101), the insulation resistance measuring unit (102), the display unit (103) and the fault indication unit (104) are respectively connected with the first power supply (105).
3. An insulation fault location system for ungrounded systems according to claim 2, characterized in that the insulation resistance measuring unit (102) is an insulation resistance measuring instrument.
4. An insulation fault localization system for ungrounded systems according to claim 2, characterized in that the display unit (103) is a LED display screen.
5. The insulation fault locating system for ungrounded systems according to claim 2, wherein the fault indication unit (104) comprises an insulation fault alarm and pre-warning indicator lamp and a PE and KE terminal disconnection fault indicator lamp; and the insulation fault alarm and early warning indicator lamp and the PE and KE terminal disconnection fault indicator lamp are respectively connected with the processor (101).
6. An insulation fault localization system for an ungrounded system according to claim 1, characterized in that the signal generation module (2) comprises a second power supply (201), a voltage measurement unit (202) and a signal generation unit (203); the signal generating unit (203) is connected with a second power supply (201); the voltage measuring unit (202) and the signal generating unit (203) are respectively connected with a non-grounding system.
7. The insulation fault locating system for an ungrounded system according to claim 6, wherein the voltage measuring unit (202) comprises a coupling resistor, a sampling resistor and an operational amplifier; one end of the coupling resistor is connected with the ungrounded system, and the other end of the coupling resistor is connected with the sampling resistor; the other end of the sampling resistor is grounded; the input end of the operational amplifier is connected with the sampling resistor, and the output end of the operational amplifier is connected with the processor (101).
8. An insulation fault localization system for an ungrounded system according to claim 6, characterized in that the signal generating unit (203) is a signal generator.
9. An insulation fault localization system for ungrounded systems according to claim 1, characterized in that the fault localization module (3) comprises a third power supply (301), a number of metering current transformers (302) and a fault analysis unit (303); the metering type current transformer (302) and the fault analysis unit (303) are respectively connected with a third power supply (301); the current transformers (302) are respectively connected with the load branches.
10. An insulation fault localization system for ungrounded systems according to claim 1, characterized in that the fault localization system is provided with a communication module (4); the monitoring module (1) is in information interaction with the signal generating module (2) and the fault positioning module (3) through the communication module (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020796909.3U CN212540586U (en) | 2020-05-13 | 2020-05-13 | Insulation fault positioning system for ungrounded system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020796909.3U CN212540586U (en) | 2020-05-13 | 2020-05-13 | Insulation fault positioning system for ungrounded system |
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| Publication Number | Publication Date |
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| CN212540586U true CN212540586U (en) | 2021-02-12 |
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| CN202020796909.3U Active CN212540586U (en) | 2020-05-13 | 2020-05-13 | Insulation fault positioning system for ungrounded system |
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- 2020-05-13 CN CN202020796909.3U patent/CN212540586U/en active Active
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