CN215219016U - Insulation fault line and phase selection device for low-voltage power distribution system of offshore oil and gas field - Google Patents
Insulation fault line and phase selection device for low-voltage power distribution system of offshore oil and gas field Download PDFInfo
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- CN215219016U CN215219016U CN202121541010.8U CN202121541010U CN215219016U CN 215219016 U CN215219016 U CN 215219016U CN 202121541010 U CN202121541010 U CN 202121541010U CN 215219016 U CN215219016 U CN 215219016U
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Abstract
The utility model relates to an insulating fault line selection and phase selection device of a low-voltage distribution system of an offshore oil and gas field, which is characterized by comprising an insulating on-line monitoring device, a network communication device and a fault line selection and phase selection device, wherein the insulating on-line monitoring device 1 comprises a monitoring diagnosis circuit, an audible and visual alarm device, a positioning current signal generation device and a display device; the monitoring and diagnosing circuit is respectively connected with the acousto-optic alarm device, the positioning current signal generating device, the display device and a transformer in the low-voltage distribution system; the positioning current signal generating device is respectively connected with a transformer and a low-voltage bus in a low-voltage distribution system, and is also respectively connected with a display device and at least one fault line and phase selecting device through a network communication device; each trouble route selection phase selection device still corresponds the load through the three-phase conductor connection in the low voltage distribution system respectively, the utility model discloses can the wide application in the offshore oil gas field.
Description
Technical Field
The utility model relates to an insulating trouble route selection phase selection device of offshore oil gas field low pressure distribution system belongs to offshore oil gas field.
Background
The conventional insulation fault monitoring equipment for the low-voltage distribution system of the offshore oil and gas field can only monitor the insulation of the whole bus system, and cannot specifically and accurately position which circuit or even which phase of the circuit has an insulation fault. Meanwhile, most important electrical equipment of the offshore oil and gas field platform is affected by the operation condition and is very difficult to halt, great difficulty is brought to on-site power system maintenance personnel for checking low-voltage insulation faults, the hysteresis of the checking faults even causes the long-term operation of a low-voltage plate bus under the condition of single-phase ground fault, and great potential safety hazards are brought to the reliable operation of the offshore platform power system.
Therefore, an insulation fault line and phase selection device 3 capable of ensuring reliable operation and stable production of an offshore oil and gas field power system is needed.
Disclosure of Invention
To the problem, the utility model aims at providing a can guarantee marine oil gas field electric power system reliable operation and the marine oil gas field low pressure distribution system insulation fault route selection looks device of stable production.
In order to achieve the purpose, the utility model adopts the following technical proposal: an insulation fault line selection and phase selection device of an offshore oil and gas field low-voltage power distribution system comprises an insulation online monitoring device, a network communication device and a fault line selection and phase selection device, wherein the insulation online monitoring device comprises a monitoring diagnosis circuit, an audible and visual alarm device, a positioning current signal generation device and a display device;
the monitoring and diagnosing circuit is respectively connected with the acousto-optic alarm device, the positioning current signal generating device, the display device and a transformer in the low-voltage distribution system and is used for monitoring the insulation resistance between a phase line and the ground in the low-voltage distribution system;
the positioning current signal generating device is respectively connected with a transformer and a low-voltage bus in the low-voltage distribution system, and is also respectively connected with the display device and at least one fault line selection and phase selection device through the network communication device; each fault line and phase selection device is also connected with corresponding loads through three-phase conductors in the low-voltage distribution system.
Preferably, the monitoring and diagnosing circuit comprises an injection signal source and a sampling resistor;
the injection signal source is arranged at a neutral point of a transformer in the low-voltage distribution system, one end of the injection signal source is grounded, the other end of the injection signal source is connected with one end of the sampling resistor, and the injection signal source is used for injecting signals into the low-voltage distribution system; the other end of the sampling resistor is respectively connected with a transformer, an audible and visual alarm device, a positioning current signal generating device and a display device in the low-voltage distribution system, and the sampling resistor is used for collecting the insulation resistance between a phase line and the ground in the low-voltage distribution system.
Preferably, each fault line selection and phase selection device comprises an insulation fault locator and a plurality of positioning channels, wherein each positioning channel comprises a first current transformer and a second current transformer;
each insulation fault locator is respectively connected with the positioning current signal generating device and the display device through the network communication device, and is also respectively connected with a low-voltage bus and a three-phase conductor in the low-voltage distribution system through the corresponding first current transformer; all be provided with on the three-phase conductor in the low voltage distribution system and correspond second current transformer, each insulation fault locater still connects the corresponding three respectively second current transformer, first current transformer and second current transformer are used for monitoring the injection signal of place circuit, insulation fault locater is used for detecting whether the conductor branch road that each load is connected is the fault line in the low voltage distribution system to confirm the positional information of fault line.
Preferably, each insulation fault locator corresponds to no more than 12 locating channels.
Preferably, the number of the fault line selection and phase selection devices is not more than 20.
Preferably, the positioning current signal generating device adopts a pulse signal generator.
Preferably, the network communication device is a network communication device adopting a Modbus communication protocol.
The utility model discloses owing to take above technical scheme, it has following advantage:
1. the utility model discloses owing to be provided with a plurality of trouble route selection phase selection devices, adopt dispersed modular structure, the debugging is maintained conveniently, the configuration is nimble and the whole reliability of system is high, is applicable to the offshore oil gas field electric power system who has higher electric capacity to ground leakage, can realize oil gas field low pressure distribution system insulation fault monitoring and route selection phase selection.
2. The utility model discloses owing to be provided with insulating on-line monitoring device and trouble route selection phase selection device, can realize insulating real-time supervision and fault circuit's accurate positioning, shorten inquiry time and in time discover the excellent performance in trouble ground, greatly improve marine oil gas field low pressure distribution system safe operation, can wide application in the marine oil gas field.
Drawings
Fig. 1 is a schematic structural diagram according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
The embodiment of the utility model provides an insulating fault route selection looks device of offshore oil gas field low pressure distribution system can realize the insulating fault monitoring of offshore oil gas field low pressure distribution system to and the accurate positioning of fault loop and trouble looks.
As shown in fig. 1, the utility model provides an insulating fault line selection phase selection device of offshore oil gas field low pressure distribution system, including insulating on-line monitoring device 1, network communication device 2 and fault line selection phase selection device 3, wherein, insulating on-line monitoring device 1 is including monitoring diagnostic circuit 11, audible and visual alarm device 12, location current signal generating device 13 and display device 14, and the quantity of fault line selection phase selection device 3 is at least one.
The monitoring and diagnosing circuit 11 is respectively connected with the acousto-optic alarm device 12, the positioning current signal generating device 13, the display device 14 and the transformer 4 in the low-voltage distribution system, the monitoring and diagnosing circuit 11 is used for monitoring the insulation resistance between a phase line and the ground in the low-voltage distribution system, and the acousto-optic alarm device 12 is used for giving an acousto-optic alarm when the insulation resistance monitored by the monitoring and diagnosing circuit 11 is smaller than a preset value.
The positioning current signal generating device 13 is respectively connected with a transformer 4 and a 400V low-voltage bus in a low-voltage distribution system, the positioning current signal generating device 13 is also respectively connected with the display device 14 and each fault line selection and phase selection device 3 through the network communication device 2, and the positioning current signal generating device 13 is used for sending a positioning current signal to each fault line selection and phase selection device 3 through the network communication device 2 when the audible and visual alarm device 12 performs audible and visual alarm. Each fault line selection phase selection device 3 is also connected with a corresponding load through an A phase conductor, a B phase conductor and a C phase conductor in the low-voltage distribution system, the fault line selection phase selection device 3 is used for detecting whether a conductor branch connected with each load in the low-voltage distribution system is a fault line or not and determining the position information of the fault line, and the display device 14 is used for displaying the monitored insulation resistance value and displaying the fault positioning information sent by the fault line selection phase selection device 3.
In a preferred embodiment, the positioning current signal generating means 13 may employ a pulse signal generator.
In a preferred embodiment, the monitor and diagnostic circuit 11 includes an injection signal source 111 and a sampling resistor 112. The injection signal source 111 is arranged at a neutral point of the transformer 4 in the low-voltage distribution system, one end of the injection signal source 111 is grounded, the other end of the injection signal source 111 is connected with one end of the sampling resistor 112, the injection signal source 111 is used for injecting signals into the low-voltage distribution system, the other end of the sampling resistor 112 is respectively connected with the transformer 4, the sound and light alarm device 12, the positioning current signal generating device 13 and the display device 14 in the low-voltage distribution system, and the sampling resistor 112 is used for collecting insulation resistance between a phase line and the ground in the low-voltage distribution system based on the signals injected by the injection signal source 111. The working principle of the monitoring and diagnosing circuit 11 is as follows: if insulation degradation occurs on a C-phase conductor of a low-voltage distribution system and the ground insulation resistance of the C-phase conductor drops, a signal injected by an injection signal source 111 forms a closed loop along a sampling resistor 112, the ground insulation resistor and a grounding resistor of an exposed conductive part, fault current can be calculated according to the basic circuit principle of the closed loop, when the ground insulation resistor is reduced to a certain degree and the fault current is increased sharply, and when the voltage drop on the sampling resistor 112 exceeds a preset value, a monitoring and diagnosing circuit 11 can reflect the insulation drop of the low-voltage distribution system, so that an audible and visual alarm device 12 is triggered to give an alarm, and the insulation resistance value is displayed through a display device 14.
In a preferred embodiment, the injection signal source 111 can select different injection signals, such as: selecting the injected signal as a direct current signal, wherein the direct current signal is only suitable for a system with small leakage capacitance to the ground; the signal of selecting to inject is the pulse voltage signal of stack adaptation, and this pulse voltage signal is a discrete signal, and with ordinary analog signal (for example sine wave), between the wave form time axis discontinuity (there is obvious interval between wave form and the wave form) but have certain periodicity, makes the utility model discloses can be applied to alternating current system, direct current system, take alternating current system, the variable frequency drive system of direct current composition and have higher system to earth leakage electric capacity etc..
In a preferred embodiment, each fault line selection and phase selection device 3 comprises an insulation fault locator 31 and a plurality of locating channels 32, wherein each locating channel 32 comprises a first current transformer 321 and a second current transformer 322.
Each insulation fault locator 31 is respectively connected with a positioning current signal generating device 13 and a display device 14 through a network communication device 2, each insulation fault locator 31 is also respectively connected with a 400V low-voltage bus, an A-phase conductor, a B-phase conductor and a C-phase conductor in a low-voltage distribution system through a corresponding first current transformer 321, the A-phase conductor, the B-phase conductor and the C-phase conductor in the low-voltage distribution system are respectively provided with a corresponding second current transformer 322, each insulation fault locator 31 is also respectively connected with three corresponding second current transformers 322, the first current transformer 321 and the second current transformer 322 are used for monitoring injection signals of a line where the insulation fault locator 31 is located, the insulation fault locator 31 is used for determining whether a fault line exists according to the positioning current signals sent by the positioning current signal generating device 13 and the injection signals monitored by the current transformers, namely, the line where the injection signals are detected is a fault line, and determines the position information of the faulty wire to be transmitted to the display device 14 through the network communication device 2.
In a preferred embodiment, in order to avoid the communication efficiency from being too low, the number of the fault line selection phase selection devices 3 is not more than 20, and the number of the positioning channels 32 corresponding to each insulation fault locator 31 is not more than 12.
In a preferred embodiment, the network communication device 2 may be a network communication device using the Modbus communication protocol.
The utility model discloses take place insulating degradation for concrete embodiment detailed description below with low voltage distribution system's C phase conductor the utility model discloses the use of marine oil gas field low voltage distribution system insulation fault route selection phase selection device:
1) the injection signal source 111 injects a signal into a C-phase conductor of the low-voltage distribution system, and the injected signal forms a closed loop along the sampling resistor 112 with respect to the ground insulation resistor and the exposed conductive part grounding resistor.
2) When the ground insulation resistance is reduced to a certain degree, the fault current sharply increases, and when the voltage drop on the sampling resistor 112 exceeds the preset value, the monitoring and diagnosing circuit 11 will reflect the insulation drop of the low-voltage distribution system, and further trigger the audible and visual alarm device 12 to give an alarm.
3) Meanwhile, the positioning current signal generating device 13 sends a positioning current signal to the insulation fault locator 31 of each fault line selection phase selection device 3 through the network communication device 2.
4) Each of the first current transformer 321 and the second current transformer 322 monitors an injection signal of a line where the first current transformer is located, and sends the injection signal to the corresponding insulation fault locator 31.
5) Each insulation fault locator 31 determines whether an injection signal of the injection signal source 111 exists at each line outlet according to the positioning current signal sent by the positioning current signal generating device 13 and the injection signal monitored by the current transformer, determines the line in which the injection signal is detected as a fault line, and determines the position information of the fault line.
6) Each insulation fault locator 31 transmits the position information of the fault line to the display device 14 through the network communication device 2 to display it.
Above-mentioned each embodiment only is used for explaining the utility model discloses, wherein structure, connected mode and the preparation technology etc. of each part all can change to some extent, all are in the utility model discloses equal transform and improvement of going on technical scheme's the basis all should not exclude outside the protection scope of the utility model.
Claims (7)
1. An insulation fault line selection and phase selection device of a low-voltage power distribution system of an offshore oil and gas field is characterized by comprising an insulation online monitoring device, a network communication device and a fault line selection and phase selection device, wherein the insulation online monitoring device comprises a monitoring diagnosis circuit, an audible and visual alarm device, a positioning current signal generation device and a display device;
the monitoring and diagnosing circuit is respectively connected with the acousto-optic alarm device, the positioning current signal generating device, the display device and a transformer in the low-voltage distribution system and is used for monitoring the insulation resistance between a phase line and the ground in the low-voltage distribution system;
the positioning current signal generating device is respectively connected with a transformer and a low-voltage bus in the low-voltage distribution system, and is also respectively connected with the display device and at least one fault line selection and phase selection device through the network communication device; each fault line and phase selection device is also connected with corresponding loads through three-phase conductors in the low-voltage distribution system.
2. The device for selecting the insulation fault line and the phase of the offshore oil and gas field low-voltage power distribution system according to claim 1, wherein the monitoring and diagnosing circuit comprises an injection signal source and a sampling resistor;
the injection signal source is arranged at a neutral point of a transformer in the low-voltage distribution system, one end of the injection signal source is grounded, the other end of the injection signal source is connected with one end of the sampling resistor, and the injection signal source is used for injecting signals into the low-voltage distribution system; the other end of the sampling resistor is respectively connected with a transformer, an audible and visual alarm device, a positioning current signal generating device and a display device in the low-voltage distribution system, and the sampling resistor is used for collecting the insulation resistance between a phase line and the ground in the low-voltage distribution system.
3. The insulation fault line and phase selection device for the offshore oil and gas field low voltage power distribution system according to claim 1, wherein each of the fault line and phase selection devices comprises an insulation fault locator and a plurality of positioning channels, wherein each of the positioning channels comprises a first current transformer and a second current transformer;
each insulation fault locator is respectively connected with the positioning current signal generating device and the display device through the network communication device, and is also respectively connected with a low-voltage bus and a three-phase conductor in the low-voltage distribution system through the corresponding first current transformer; all be provided with on the three-phase conductor in the low voltage distribution system and correspond second current transformer, each insulation fault locater still connects the corresponding three respectively second current transformer, first current transformer and second current transformer are used for monitoring the injection signal of place circuit, insulation fault locater is used for detecting whether the conductor branch road that each load is connected is the fault line in the low voltage distribution system to confirm the positional information of fault line.
4. The insulation fault line and phase selection device for the offshore oil and gas field low voltage power distribution system according to claim 3, wherein each insulation fault locator corresponds to no more than 12 positioning channels.
5. The insulation fault line and phase selection device for the offshore oil and gas field low voltage power distribution system of claim 1, wherein the number of the fault line and phase selection devices is not more than 20.
6. The insulation fault line and phase selection device for the offshore oil and gas field low-voltage power distribution system as claimed in any one of claims 1 to 5, wherein the positioning current signal generating device adopts a pulse signal generator.
7. The device for selecting the insulation fault line and the phase of the offshore oil and gas field low-voltage power distribution system according to any one of claims 1 to 5, wherein the network communication device is a network communication device adopting a Modbus communication protocol.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121541010.8U CN215219016U (en) | 2021-07-07 | 2021-07-07 | Insulation fault line and phase selection device for low-voltage power distribution system of offshore oil and gas field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121541010.8U CN215219016U (en) | 2021-07-07 | 2021-07-07 | Insulation fault line and phase selection device for low-voltage power distribution system of offshore oil and gas field |
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| Publication Number | Publication Date |
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| CN215219016U true CN215219016U (en) | 2021-12-17 |
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| CN202121541010.8U Active CN215219016U (en) | 2021-07-07 | 2021-07-07 | Insulation fault line and phase selection device for low-voltage power distribution system of offshore oil and gas field |
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| CN (1) | CN215219016U (en) |
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- 2021-07-07 CN CN202121541010.8U patent/CN215219016U/en active Active
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