CN215733483U - Underwater remote power transmission and variable frequency driving device - Google Patents
Underwater remote power transmission and variable frequency driving device Download PDFInfo
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- CN215733483U CN215733483U CN202121924159.4U CN202121924159U CN215733483U CN 215733483 U CN215733483 U CN 215733483U CN 202121924159 U CN202121924159 U CN 202121924159U CN 215733483 U CN215733483 U CN 215733483U
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Abstract
The utility model relates to an underwater long-distance power transmission and variable frequency driving device, which comprises: the cable comprises an overwater module, an underwater module and a photoelectric composite cable; the water block comprises a first control branch and a second control branch; the first control branch is used for converting alternating current provided by the alternating current network into power direct current required by the underwater chunk; the second control branch is used for converting alternating current provided by the alternating current network into control direct current required by the underwater module and providing a control signal for the underwater module; the underwater module comprises an underwater load driving module and a control load driving module, the underwater load driving module and the control load driving module are respectively connected with the first control branch and the second control branch through photoelectric composite cables, and power is supplied by the first control branch and the second control branch; the control load driving block also receives a control signal sent by the second control branch through the photoelectric composite cable and drives the underwater load driving block. The utility model can be widely applied to underwater power supply systems.
Description
Technical Field
The utility model relates to an underwater power supply system, in particular to an underwater long-distance power transmission and variable frequency driving device which can be used in the field of underwater production systems.
Background
Along with the rapid development of economy in China, the demand on energy is increasingly outstanding, and the urgent demand on energy can be effectively relieved by abundant marine petroleum resources in China. Meanwhile, as the amount of offshore oil production increases, more underwater power supply systems are required to be applied to supply required power to the remote underwater production system.
However, the currently used underwater power supply system mostly adopts a direct power supply mode or an alternating current power supply mode, and has the disadvantages of limited power transmission distance and limited transmission power.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an underwater remote power transmission and variable frequency driving apparatus, which adopts an inversion technique, and arranges an inverter underwater to realize remote direct current transmission, thereby solving the technical bottleneck.
In order to achieve the purpose, the utility model adopts the following technical scheme: an underwater remote power transmission and variable frequency drive device, comprising:
the cable comprises an overwater module, an underwater module and a photoelectric composite cable;
the water chunk comprises a first control branch and a second control branch which are arranged in parallel;
the first control branch is used for converting alternating current provided by an alternating current power grid into power direct current required by the underwater chunk;
the second control branch is used for converting alternating current provided by the alternating current power grid into control direct current required by the underwater chunk and providing a control signal for the underwater chunk;
the underwater module comprises an underwater load driving module and a control load driving module, the underwater load driving module and the control load driving module are respectively connected with a first control branch and a second control branch through the photoelectric composite cable, and the first control branch and the second control branch supply power;
the control load driving block also receives a control signal sent by the second control branch through the photoelectric composite cable and drives the underwater load driving block.
Further, a power-on buffering protection module is arranged between the water chunk and the alternating current power grid.
Further, the water chunks are located above sea surface and installed on water facilities or land.
Further, a power electric transformer, a power electric breaker, a power electric rectifying module and a first direct current reactor are arranged on the first control branch in series; the power electric transformer is used for performing voltage conversion on alternating current provided by the alternating current power grid, and the power electric rectification module is used for converting the alternating current converted by the power electric transformer into power direct current; the power electric circuit breaker and the first direct current reactor are used for providing protection for the first control branch.
Further, the power electric rectification module adopts a thyristor or an insulated gate bipolar transistor as a full-control rectification device.
Further, the second control branch comprises a first control electrical transformer, and a third control branch and a fourth control branch which are connected with the first control electrical transformer;
the first control electric transformer is used for converting alternating current electric energy provided by the alternating current power grid, and the converted electric energy is respectively sent to the third control branch and the fourth control branch;
the third control branch comprises a control electric circuit breaker, a control electric rectifying module and a second direct current reactor which are connected in series, the control electric rectifying module is used for converting electric energy sent by the first control electric transformer into control direct current required by the underwater module, and the control electric circuit breaker and the second direct current reactor are used for protecting the third control branch;
the fourth control branch comprises a second control electric transformer and a master control module, the second control electric transformer is used for converting the electric energy sent by the first control electric transformer and then supplying power to the master control module, and the master control module is used for providing control signals for the underwater module.
Further, the control electric rectification module adopts a thyristor or an insulated gate bipolar transistor as a full-control rectification device.
Further, the underwater module is located below the sea surface and is installed in a metal enclosure at the sea bottom.
Further, the underwater load driving module comprises a third direct current reactor, a direct current fuse, an inversion module and a filtering module which are connected in series; the inversion module is used for converting power electricity direct current into alternating current according to a driving signal sent by the control load driving module; the filtering module is used for filtering the alternating current and then supplying power to the underwater load; and the third direct current reactor and the direct current fuse are used for providing protection for the underwater load driving block.
Further, the control load driving module comprises a fourth direct current reactor, a wide voltage direct current switch power supply and a driving module; the driving module is used for receiving the control signal sent by the main control module and driving the underwater load driving module; and the fourth direct current reactor and the wide voltage direct current switching power supply are used for providing protection for the control load driving block.
Due to the adoption of the technical scheme, the utility model has the following advantages:
1. the power electricity conversion, the control electricity conversion and the control signals in the water block are respectively and independently arranged, so that the interference among different voltage levels is avoided;
2. the underwater module is arranged in the sealed metal device, and the sealed metal device has good sealing, heat dissipation, water resistance and corrosion resistance, can effectively protect the underwater module, and prolongs the service life of the device;
3. according to the utility model, the protection devices are arranged in the water chunk and the underwater chunk, so that the circuit can be cut off in time according to the corresponding fusing threshold value in the circuit, and the effect of protecting a power transmission system is achieved.
Therefore, the underwater power supply system can be widely applied to the underwater power supply system.
Drawings
FIG. 1 is a simplified block diagram of an underwater remote power transmission and variable frequency drive system provided by an embodiment of the present invention;
fig. 2 is a cross-sectional view of a photoelectric composite cable structure provided by an embodiment of the utility model;
the components in the figure are as follows:
1. an alternating current grid; 2. a power-on buffer protection module; 3. water chunking; 4. an offshore platform or drilling vessel; 5. underwater block assembly; 6. an electric submersible pump; 7. sea surface; 8. the sea floor; 9. a photoelectric composite cable; 10. a cable; 30. a power electrical transformer; 31. a power electrical circuit breaker; 32. a power electric rectification module; 33. a first direct current reactor; 34. a first control electrical transformer; 35. controlling an electrical circuit breaker; 36. controlling the electrical rectification module; 37. a second direct current reactor; 38. a second control electrical transformer; 39. a main control module; 50. a third direct current reactor; 51. a direct current fuse; 52. an inversion module; 53. a filtering module; 54. a fourth direct current reactor; 55. a wide voltage DC switching power supply; 56. a drive module; 90. an insulating protective layer of the photoelectric composite cable; 91. a direct current power electrical lead; 92. a direct current control electrical lead; 93. an optical fiber wire; 94. a direct current power electric lead insulation protective layer; 95. a DC control electrical lead insulation protective layer; 96. and the optical fiber conducting wire is an insulating protective layer.
Detailed Description
The utility model is described in detail below with reference to the figures and examples.
The utility model provides an underwater remote power transmission and variable frequency driving device, which is characterized in that a generator provides three-phase alternating current, the three-phase alternating current is converted into direct current through a rectifier and is converted into alternating current through an underwater inverter to supply power to an underwater load, and the underwater remote power transmission and variable frequency driving of the underwater load are realized.
Specifically, as shown in fig. 1, the present invention provides an underwater remote power transmission and variable frequency driving device, which includes: the water-surface module 3, the underwater module 5 and the photoelectric composite cable 9. The water block 3 comprises a first control branch and a second control branch which are arranged in parallel; the first control branch is used for converting alternating current provided by the alternating current power grid 1 into power direct current required by the underwater module 5; the second control branch is used for converting alternating current provided by the alternating current power grid 1 into control direct current required by the underwater chunk 5 and providing a control signal for the underwater chunk 5; the underwater module 5 comprises an underwater load driving module and a control load driving module which are arranged in parallel, the underwater load driving module and the control load driving module are respectively connected with a first control branch and a second control branch through a photoelectric composite cable 9, power is supplied by the first control branch and the first control branch, and meanwhile the control load driving module also receives a control signal sent by the second control branch through the photoelectric composite cable 9 and drives the underwater load driving module.
Preferably, a power-on buffering protection module 2 is arranged between the water block 3 and the alternating current power grid 1.
Preferably, the marine module 3 is located above the sea surface 7, and may be installed on marine facilities such as offshore platforms and drill ships 4, or may be installed on land.
Preferably, the water block 3 is installed in a cabin with good ventilation, heat dissipation and explosion-proof performance, and the cabin can effectively protect the water block 3.
Preferably, the first control branch is provided with a power electric transformer 30, a power electric circuit breaker 31, a power electric rectification module 32 and a first direct current reactor 33 in series. The power electric transformer 30 is used for performing voltage conversion on alternating current provided by the alternating current power grid 1, and the power electric rectification module 32 is used for converting the alternating current converted by the power electric transformer 30 into power direct current; the power circuit breaker 31 and the first dc reactor 33 are used to provide protection for the first control branch.
Preferably, the second control branch comprises a first control electrical transformer 34 and third and fourth control branches connected to the first control electrical transformer 34. The first control electrical transformer 34 is configured to convert ac power provided by the ac power grid 1, and the converted power is respectively sent to the third control branch and the fourth control branch; the third control branch comprises a control electric circuit breaker 35, a control electric rectifying module 36 and a second direct current reactor 37 which are connected in series, the control electric rectifying module 36 is used for converting electric energy sent by the first control electric transformer 34 into control direct current required by the underwater module 5, and the control electric circuit breaker 35 and the second direct current reactor 37 are used for providing protection for the third control branch; the fourth control branch comprises a second control electrical transformer 38 and a master control module 39, the second control electrical transformer 38 is used for converting the electric energy sent by the first control electrical transformer 34 into control direct current required by the master control module 39 to supply power to the master control module 39, and the master control module 39 is used for providing control signals for the underwater module 5.
Preferably, the power electric rectification module 32 and the control electric rectification module 36 may adopt a thyristor or an Insulated Gate Bipolar Transistor (IGBT) as a fully-controlled rectification device.
Preferably, the subsea block 5 is located below the sea surface 7 and is installed on the sea floor 8.
Preferably, the underwater block 5 is enclosed in a metal enclosure with good sealing, heat dissipation, water resistance and corrosion resistance, which can effectively protect the underwater block 5.
Preferably, the underwater load driving block includes a third dc reactor 50, a dc fuse 51, an inverter module 52 and a filter module 53. The inverter module 52 is configured to convert the power electric direct current into an alternating current according to a driving signal sent by the control load driving block; the filtering module 53 is used for filtering the alternating current and then supplying power to the underwater load such as the electric submersible pump 6; a third dc reactor 50 and a dc fuse 51 are used to provide protection for the subsea load driving block.
Preferably, the control load driving block includes a fourth dc reactor 54, a wide voltage dc switching power supply 55, and a driving module 56. The driving module 56 is configured to receive a control signal sent by the main control module 39, and drive the underwater load driving block; a fourth dc reactor 54, a wide voltage dc switching power supply 55 are used to provide protection for the control load drive block.
Preferably, as shown in fig. 2, it is a structural cross-sectional view of the optical-electrical composite cable 9, which includes: the photoelectric composite cable comprises a photoelectric composite cable insulation protective layer 90, and a direct current power electric lead 91, a direct current control electric lead 92 and an optical fiber lead 93 which are arranged in the photoelectric composite cable insulation protective layer 90; wherein, the direct current power electric lead 91, the direct current control electric lead 92 and the optical fiber lead 93 are respectively coated with a direct current power electric lead insulating protective layer 94, a direct current control electric lead insulating protective layer 95 and an optical fiber lead insulating protective layer 96.
Preferably, the ac power grid 1 is the power supply source of the power supply system.
When the utility model works, an alternating current power supply is provided by an alternating current power grid 1. After passing through the power-on buffer protection module 2, the alternating current power supply is divided into 2 paths, wherein one path is power electricity, and the other path is control electricity. For the power electricity, an alternating current power supply is transmitted to a power electricity breaker 31 through a power electricity transformer 30, and is converted into power direct current through a power electricity rectifying module 32, and then the power direct current is further transmitted to the underwater through a first direct current reactor 33. For the control power, on the one hand, the ac power is transmitted to the control power breaker 35 through the first control power transformer 34, and further transmitted to the water through the second dc reactor 37 after being converted into the control dc power through the control power rectifier module 36, and on the other hand, the ac power is transmitted to the second control power transformer 38 through the first control power transformer 34 to supply power to the main control module 39.
In the process of transmitting power electricity, control electricity and control signals from the water block 3 to the underwater block 5: on one hand, power electricity is transmitted from the first direct current reactor 33 to the third direct current reactor 50 through a direct current power electric lead 91, transmitted to the inversion module 52 through the direct current fuse 51, converted into an alternating current power supply, and then supplied to the underwater load electric submersible pump 6 through the cable 10 through the filtering module 53, and the filtering module 53 can provide cleaner three-phase alternating current for the load electric submersible pump 6. On the one hand, the control power is transmitted from the second dc reactor 37 to the fourth dc reactor 54 via the dc control electrical conductor 92, and is supplied to the drive module 56 via the wide voltage dc switching power supply 55. On the one hand, the control signal is transmitted from the main control module 39 to the driving module 56 through the optical fiber wire 93 to drive and control the inverter module 52.
When the power transmission device of the utility model has a fault, the power-on buffer protection module 2, the power circuit breaker 31, the control circuit breaker 35, the direct current fuse 51 and the wide voltage direct current switch power supply 55 can cut off the circuit in time according to the corresponding fusing threshold value in the circuit, thereby achieving the effect of protecting the power transmission system.
The above embodiments are only used for illustrating the present invention, and the structure, connection mode, manufacturing process, etc. of the components may be changed, and all equivalent changes and modifications performed on the basis of the technical solution of the present invention should not be excluded from the protection scope of the present invention.
Claims (10)
1. The utility model provides an underwater long distance transmission of electricity and variable frequency drive device which characterized in that includes:
the cable comprises an overwater module, an underwater module and a photoelectric composite cable;
the water chunk comprises a first control branch and a second control branch which are arranged in parallel;
the first control branch is used for converting alternating current provided by an alternating current power grid into power direct current required by the underwater chunk;
the second control branch is used for converting alternating current provided by the alternating current power grid into control direct current required by the underwater chunk and providing a control signal for the underwater chunk;
the underwater module comprises an underwater load driving module and a control load driving module, the underwater load driving module and the control load driving module are respectively connected with a first control branch and a second control branch through the photoelectric composite cable, and the first control branch and the second control branch supply power;
the control load driving block also receives a control signal sent by the second control branch through the photoelectric composite cable and drives the underwater load driving block.
2. An underwater remote power transmission and variable frequency drive as claimed in claim 1, wherein: and a power-on buffering protection module is arranged between the water block and the alternating current power grid.
3. An underwater remote power transmission and variable frequency drive as claimed in claim 1, wherein: the water blocks are positioned above the sea surface and are installed on water facilities or land.
4. An underwater remote power transmission and variable frequency drive as claimed in claim 1, wherein: the first control branch circuit is connected with a power electric transformer, a power electric breaker, a power electric rectifying module and a first direct current reactor in series; the power electric transformer is used for performing voltage conversion on alternating current provided by the alternating current power grid, and the power electric rectification module is used for converting the alternating current converted by the power electric transformer into power direct current; the power electric circuit breaker and the first direct current reactor are used for providing protection for the first control branch.
5. An underwater remote power transmission and variable frequency drive as claimed in claim 4, wherein: the power electric rectifying module adopts a thyristor or an insulated gate bipolar transistor as a full-control rectifying device.
6. An underwater remote power transmission and variable frequency drive as claimed in claim 1, wherein: the second control branch comprises a first control electric transformer, and a third control branch and a fourth control branch which are connected with the first control electric transformer;
the first control electric transformer is used for converting alternating current electric energy provided by the alternating current power grid, and the converted electric energy is respectively sent to the third control branch and the fourth control branch;
the third control branch comprises a control electric circuit breaker, a control electric rectifying module and a second direct current reactor which are connected in series, the control electric rectifying module is used for converting electric energy sent by the first control electric transformer into control direct current required by the underwater module, and the control electric circuit breaker and the second direct current reactor are used for protecting the third control branch;
the fourth control branch comprises a second control electric transformer and a master control module, the second control electric transformer is used for converting the electric energy sent by the first control electric transformer and then supplying power to the master control module, and the master control module is used for providing control signals for the underwater module.
7. An underwater remote power transmission and variable frequency drive as claimed in claim 5, wherein: the control electric rectification module adopts a thyristor or an insulated gate bipolar transistor as a full-control rectification device.
8. An underwater remote power transmission and variable frequency drive as claimed in claim 1, wherein: the underwater module is located below the sea surface and is installed in a metal closed device on the sea bottom.
9. An underwater remote power transmission and variable frequency drive as claimed in claim 1, wherein: the underwater load driving module comprises a third direct current reactor, a direct current fuse, an inversion module and a filtering module which are connected in series; the inversion module is used for converting power electricity direct current into alternating current according to a driving signal sent by the control load driving module; the filtering module is used for filtering the alternating current and then supplying power to the underwater load; and the third direct current reactor and the direct current fuse are used for providing protection for the underwater load driving block.
10. An underwater remote power transmission and variable frequency drive as claimed in claim 1, wherein: the control load driving module comprises a fourth direct current reactor, a wide voltage direct current switching power supply and a driving module; the driving module is used for receiving the control signal sent by the main control module and driving the underwater load driving module; and the fourth direct current reactor and the wide voltage direct current switching power supply are used for providing protection for the control load driving block.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121924159.4U CN215733483U (en) | 2021-08-17 | 2021-08-17 | Underwater remote power transmission and variable frequency driving device |
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| CN202121924159.4U CN215733483U (en) | 2021-08-17 | 2021-08-17 | Underwater remote power transmission and variable frequency driving device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115441455A (en) * | 2022-11-07 | 2022-12-06 | 深之蓝海洋科技股份有限公司 | Underwater robot system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115441455A (en) * | 2022-11-07 | 2022-12-06 | 深之蓝海洋科技股份有限公司 | Underwater robot system |
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