CN203374539U - Oil supply circulating system for submarine oil-charged power cable - Google Patents
Oil supply circulating system for submarine oil-charged power cable Download PDFInfo
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- CN203374539U CN203374539U CN201320484327.1U CN201320484327U CN203374539U CN 203374539 U CN203374539 U CN 203374539U CN 201320484327 U CN201320484327 U CN 201320484327U CN 203374539 U CN203374539 U CN 203374539U
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- oil
- fuel tank
- insulation
- power cable
- station control
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Abstract
The utility model discloses an oil supply circulating system for a submarine oil-charged power cable. The oil supply circulating system for the submarine oil-charged power cable comprises a hydraulic system, an insulation oil tank station control system used for controlling changes in oil supply, an oil measuring device and an oil supply loop system. The hydraulic system is connected with the insulation oil tank station control system. The other end of the insulation oil tank station control system is connected with the oil measuring device. The oil measuring device is connected with the oil supply loop system. The oil supply loop system is further connected to the insulation oil tank station control system. The parametric variation of oil pressure and oil passage flow speed is directly measured after an oil passage is damaged, so that condition changes are identified. The situation that a pump station PLC program is used for control to start an emergency oil flow mode can be realized; besides, oil flow can be reduced to the minimum flow according to a preset curve to ensure that no sea water can enter the cable and prevent redundant insulation oil from being leaked to the environment as far as possible. The oil supply circulating system for the submarine oil-charged power cable effectively guarantees oil supply circulation of the submarine power cable in an emergency mode, realizes automation, and improves reliability of oil supply circulation.
Description
Technical field
The utility model belongs to the oil supply system field, particularly relates to all can tackling under normal mode and the oil-filled power cable in seabed is subject to the confession oil circulating system field under the urgent oily stream mode of outside destroy
Background technique
Sea electric power cable utmost point under the operating conditions of sea bottom complex is subject to the impact of personal factor, by external force, damaged, sea electric power cable is again very important power channel simultaneously, for the consideration of power network safety operation, need to ensure the operation longer time under the sea electric power cable emergency.For the oil-filled type sea electric power cable, the damaged and oil that cause of sea electric power cable leaks outside and can concerning power cable itself, produce impact greatly, and the fuel feeding circulation can't complete, and seawater infiltration power cable can cause the stoppage in transit of this subsea power passage.Not only under normal state, complete the circulation of built-in electrical insulation oil in order to ensure sea electric power cable, also under urgent oily stream mode, can make the oil circulation continue to maintain, sea electric power cable continues stable operation a period of time, so will be in the situation that urgent oily stream mode be the oil duct leakage of oil, carry out the minimum supply of corresponding adjustment oil stream according to gallery pressure and oily Flow Velocity, to guarantee not having seawater can enter cable, prevent that submarine cable is damaged, and reduce as far as possible unnecessary insulating oil and leak in environment, thereby avoid causing a large amount of economic losses.
The sea electric power cable oil supply system does not have the system schema of complete maturation at present, lacks relevant ripe experience, and actively adjustable safety is tackled urgent oily stream mode reliably.Be how outwards oil extraction on earth, discharge extra large cable oil in how many oil, insulation oil tank and how long can adhere to, need to be equipped with how many insulation wet goods problems and all know nothing for the urgent oily stream mode cable of plunging into the commercial sea, and these to be all extra large cable repaiied by laggard the robbing of outside destroy, the problem of having at first consider.
The model utility content
Technical problem to be solved in the utility model is: in order to overcome the oil duct leakage of oil due to extra large cable breakage, realization oil circulation under urgent oily stream mode continues to maintain, sea electric power cable continues stable operation a period of time, and the utility model provides a kind of confession oil circulating system that is applied to the oil-filled power cable in seabed.
For realizing above purpose, the utility model has been taked following technological scheme: a kind of confession oil circulating system that is applied to seabed oil-filled type power cable, comprise hydraulic system, the insulation fuel tank station control system, oil survey device and the oil supply loop system that change for controlling fuel delivery, hydraulic system is connected with insulation fuel tank station control system, the insulation fuel tank station control system the other end is surveyed device with oil and is connected, oil is surveyed device and is connected with the oil supply loop system, and the oil supply loop system is also connected to described insulation fuel tank station control system.
Described hydraulic system comprises hydraulic pressure installation and storage pressure liquid nitrogen bottle; Described insulation fuel tank station control system comprises insulation fuel tank, UPS emergency supply and PLC automatic controller, and described UPS emergency supply is connected with the insulation fuel tank respectively with the PLC automatic controller, and hydraulic system is connected with the insulation fuel tank;
Described oil is surveyed device and is comprised that oil stream monitoring device is connected with the PLC automatic controller respectively with the oil pressure monitoring apparatus the other end for monitoring oil stream monitoring device and the oil pressure monitoring apparatus of sea electric power cable oil duct entrance oil stream;
Described oil supply loop system comprises remittance oil pipe and at least six insulation fuel tanks of mutually connecting, and the insulation fuel tank after series connection communicates with the remittance oil pipe, and oil pipe one end that converges is connected to the insulation fuel tank, and the other end is connected to sea electric power cable oil duct entrance.
Working principle of the present utility model is as follows: hydraulic system provides power by mechanical force to pump station oil pump, and its fuel tank that can continous-stable will insulate is entered to converging in oil pipe.The oil supply loop system provides gathering and the circulation interface loop of oil.It is, by measuring oil circuit flow and oil duct pressure, quantity of information is fed back to the PLC automatic controller through information channel that oil is surveyed device, the control command that the PLC automatic controller provides according to pre-set fuel feeding curve is given the insulation fuel tank, thereby optimizes and revises the fuel feeding decision-making.The UPS emergency supply is power outage under the reply emergency, the continuation operation of holding pump petrol station control system, and when in the UPS sentinel plant can't continue to maintain, liquid nitrogen in storage pressure liquid nitrogen bottle will promote hydraulic system and continue to make oil pump to continue operation, extend the stable supply time of oil supply system.
The utility model compared with prior art, has following advantage: directly monitor the parameter of oil pressure and oil duct flow velocity after the oil duct breakage and change, the variation of identification situation.Can realize the program control by pumping plant PLC, start urgent oily stream mode, and can reduce to minimum discharge by presetting curve, to guarantee not having seawater can enter cable, and reduce as far as possible unnecessary insulating oil and leak in environment.Fuel feeding circulation under the emergency mode of effective guarantee sea electric power cable, realized the automation for oil circulating system, improved the reliability of fuel feeding circulation.
The accompanying drawing explanation
Accompanying drawing 1 is the structural representation for oil circulating system of the present utility model;
Accompanying drawing 2 is fuel feeding decision-making plotted curves of the present utility model;
Description of reference numerals: 1-hydraulic system; The 2-fuel tank that insulate; The 3-UPS emergency supply; The 4-PLC automatic controller; 5-insulation fuel tank station control system; 6-converges oil pipe; The 7-fuel tank that insulate; 8-oil stream monitoring device; The 9-oil pressure monitoring apparatus; 10-sea electric power cable oil duct entrance; Liquid nitrogen bottle is pressed in the 11-storage.
Embodiment
Below in conjunction with the drawings and specific embodiments, content of the present utility model is described in further details.
Embodiment one
Referring to Fig. 1, a kind of confession oil circulating system that is applied to seabed oil-filled type power cable, comprise hydraulic system 1, the insulation fuel tank station control system 5, oil survey device and the oil supply loop system that change for controlling fuel delivery, hydraulic system 1 is connected with insulation fuel tank station control system 5, insulation fuel tank station control system 5 the other ends are surveyed device with oil and are connected, oil is surveyed device and is connected with the oil supply loop system, and the oil supply loop system is also connected to described insulation fuel tank station control system 5.
Hydraulic system 1 comprises hydraulic pressure installation and storage pressure liquid nitrogen bottle 11; Insulation fuel tank station control system 5 comprises insulation fuel tank 2, UPS emergency supply 3 and PLC automatic controller 4, and UPS emergency supply 3 is connected with insulation fuel tank 2 respectively with PLC automatic controller 4, and hydraulic system 1 is connected with insulation fuel tank 2;
Oil is surveyed device and is comprised that oil stream monitoring device 8 is connected with PLC automatic controller 4 respectively with oil pressure monitoring apparatus 9 the other ends for monitoring oil stream monitoring device 8 and the oil pressure monitoring apparatus 9 of sea electric power cable oil duct entrance 10 oil streams;
Described oil supply loop system comprises remittance oil pipe 6 and at least six insulation fuel tanks 7 of mutually connecting, and the insulation fuel tank 7 after series connection communicates with remittance oil pipe 6, and oil pipe 6 one ends that converge are connected to the fuel tank 2 that insulate, and the other end is connected to sea electric power cable oil duct entrance 10.
Under normal circumstances, the hydraulic power provided by hydraulic system, promote 7 motions of insulation fuel tank, insulating oil is pooled to oil pipe 6, by the monitoring to extra large cable pressure, calculates the oil mass that needs of the cable that goes to sea, and injecting extra large cable, remaining insulating oil flows back in the insulation oil tank by oil return circuit.Six insulation fuel tanks 7 are separate, each other redundancy.Pumping station system mainly carrys out maintenance work by the station electricity consumption.Oil stream monitoring device and oil pressure monitoring apparatus are measured respectively oil circuit flow and oil duct pressure, and quantity of information is fed back to PLC automatic controller 4 through information channel, the control command that PLC automatic controller 4 provides according to pre-set fuel feeding curve is given the insulation fuel tank, thereby optimizes and revises the fuel feeding decision-making.
When extra large cable operating load increases, extra large cable built-in electrical insulation oil expands, and during oil pressure Overpressure of a safety valve relief valve definite value, by pressure relief valve, flows back to oil tank, and when oil pressure is reduced to setting value, pressure relief valve resets.
Wherein extra large cable oil Flow Velocity is relevant with extra large cable length, oil duct diameter, oil pressure, expansion of liquids coefficient etc., and its equation is as follows
Δ P=(P wherein
linshi-P
Δ h)-P
nanling, mean the pressure difference in two terminal stations; P
Δ h=ρ
oilg Δ h, mean that the pressure caused due to altitude changes,
ρ oilfor the proportion of extra large cable insulating oil, in the time of 15 ℃, size is 860kg/m
3, Δ h=h
linshi-h
nanling, g=9.81m/s
2size for gravity accleration; F means oily Flow Velocity (L/min); D=30 ± 0.2mm, mean the oil duct diameter; L'=L
cable+ n
fR* 60m, the physical length that L' is extra large cable with because oily flow restriction device exists additional length, n
fR=61 numbers that are oily flow restriction device; μ=7cP, the absolute viscosity size while meaning 29 ℃.
When extra large cable, by the ship anchor, hooked or during other outside destroy and while causing breakage or fracture in addition, when extra large cable oil flow surpasses 13.4L/h or extra large cable oil pressure lower than 2.5bar, pumping station system will start urgent oily stream mode, is starting t
0in=12 hours, pumping station system PLC program will be given extra large cable fuel feeding according to predefined oily flow curve, at t
0in the time of=12 hours, υ
12the delivery rate of=48L/h, in 3 hours, extra large cable delivery rate will drop to υ subsequently
15=5L/h, after this, submarine cable will continue outside oil extraction with this speed, to stop seawater, immerse extra large cable inside, prevent that it from damaging.
Urgent fuel feeding matched curve equation preset in the PLC automatic controller is:
F (t)=873.5700-377.1213t+82.3589t
2-10.5040t
3+ 0.7962t
4-0.0326t
5+ 0.0006t
6plotted curve is as Fig. 2.
If at this moment, after drawing the disappearance of 10kV civil power outward, can automatically start the #1 diesel engine, the #1 diesel engine fault can start the #2 diesel engine automatically, thereby guarantee that pumping station system continuous service pumping station controlling system carries a set of UPS, if #1 diesel engine, #2 diesel engine all break down and can't start, pumping station controlling system will maintain operation a period of time by the UPS carried.If incoming call not yet still after during this period of time, and #1, #2 diesel engine fault not yet eliminate, and the high pressure nitrogen that each accumulator of hydraulic system stores can guarantee that insulating oil continues supply a period of time.Thereby ensure to greatest extent the reliability and stability of oil supply system reply emergency case.
Above-listed detailed description is for the illustrating of the utility model possible embodiments, and this embodiment is not in order to limit the scope of the claims of the present utility model, does not allly break away from the equivalence that the utility model does and implements or change, all should be contained in the scope of the claims of this case.
Claims (2)
1. a confession oil circulating system that is applied to seabed oil-filled type power cable, it is characterized in that: comprise hydraulic system (1), the insulation fuel tank station control system (5), oil survey device and the oil supply loop system that change for controlling fuel delivery, hydraulic system (1) is connected with insulation fuel tank station control system (5), insulation fuel tank station control system (5) the other end is surveyed device with oil and is connected, oil is surveyed device and is connected with the oil supply loop system, and the oil supply loop system is also connected to described insulation fuel tank station control system (5).
2. the confession oil circulating system that is applied to seabed oil-filled type power cable as claimed in claim 1 is characterized in that: described hydraulic system (1) comprises that hydraulic pressure installation and storage press liquid nitrogen bottle (11); Described insulation fuel tank station control system (5) comprises insulation fuel tank (2), UPS emergency supply (3) and PLC automatic controller (4), described UPS emergency supply (3) is connected with insulation fuel tank (2) respectively with PLC automatic controller (4), and hydraulic system (1) is connected with insulation fuel tank (2);
Described oil is surveyed device and is comprised that oil stream monitoring device (8) is connected with PLC automatic controller (4) respectively with oil pressure monitoring apparatus (9) the other end for monitoring oil stream monitoring device (8) and the oil pressure monitoring apparatus (9) of sea electric power cable oil duct entrance (10) oil stream;
Described oil supply loop system comprises remittance oil pipe (6) and at least six insulation fuel tanks (7) of mutually connecting, insulation fuel tank (7) after series connection communicates with remittance oil pipe (6), oil pipe (6) one ends that converge are connected to insulation fuel tank (2), and the other end is connected to sea electric power cable oil duct entrance (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320484327.1U CN203374539U (en) | 2013-08-08 | 2013-08-08 | Oil supply circulating system for submarine oil-charged power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320484327.1U CN203374539U (en) | 2013-08-08 | 2013-08-08 | Oil supply circulating system for submarine oil-charged power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203374539U true CN203374539U (en) | 2014-01-01 |
Family
ID=49837069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320484327.1U Expired - Lifetime CN203374539U (en) | 2013-08-08 | 2013-08-08 | Oil supply circulating system for submarine oil-charged power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203374539U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449576A (en) * | 2015-11-26 | 2016-03-30 | 中国南方电网有限责任公司超高压输电公司广州局 | Oil supply system used for seabed oil charging cable |
| CN110246407A (en) * | 2019-05-10 | 2019-09-17 | 华中科技大学 | A kind of experimental provision of simulated seawater pressure energy operating equipment |
-
2013
- 2013-08-08 CN CN201320484327.1U patent/CN203374539U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449576A (en) * | 2015-11-26 | 2016-03-30 | 中国南方电网有限责任公司超高压输电公司广州局 | Oil supply system used for seabed oil charging cable |
| CN105449576B (en) * | 2015-11-26 | 2018-06-26 | 中国南方电网有限责任公司超高压输电公司广州局 | A kind of oil supply system for seabed oil-filled cable |
| CN110246407A (en) * | 2019-05-10 | 2019-09-17 | 华中科技大学 | A kind of experimental provision of simulated seawater pressure energy operating equipment |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140101 |
|
| CX01 | Expiry of patent term |