CN201781279U - Power network system of offshore oil platforms - Google Patents

Power network system of offshore oil platforms Download PDF

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Publication number
CN201781279U
CN201781279U CN 201020298256 CN201020298256U CN201781279U CN 201781279 U CN201781279 U CN 201781279U CN 201020298256 CN201020298256 CN 201020298256 CN 201020298256 U CN201020298256 U CN 201020298256U CN 201781279 U CN201781279 U CN 201781279U
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China
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offshore
power
power station
platform
platforms
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Expired - Lifetime
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CN 201020298256
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Chinese (zh)
Inventor
胡鹏
谢玉洪
柯吕雄
俞进
唐广荣
王建丰
魏澈
周武章
卜华荣
叶冠群
温伟明
李卫团
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China National Offshore Oil Corp CNOOC
CNOOC China Ltd Zhanjiang Branch
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China National Offshore Oil Corp CNOOC
CNOOC China Ltd Zhanjiang Branch
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Priority to CN 201020298256 priority Critical patent/CN201781279U/en
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Abstract

A power network system of offshore oil platforms leads a plurality of offshore platform power stations on a plurality of offshore oil drilling platforms in a sea area to be mutually connected through submarine cable to form a small grid-connected power system. The submarine cable is an optical fiber cable and embedded 0.5meter to 2.5meters under the seabed. The small power system comprises a centralized information management layer which is arranged in a power station dispatching management center, data acquiring servers which are respectively arranged on a plurality of offshore platform stations, a power station unit control system, a video session device and corresponding network equipment. The power network system of offshore oil platforms leads platforms to supply power to each other through power network, enhances capability of resisting accident, promotes the reliability of power supply of each power station, decreases the number of backup unit, increases the use ratio of idle assets, saves the cost of investment and operation maintenance, effectively decreases the investment and development cost in new oil and gas fields, increases economic benefits, and reduces energy consumption.

Description

Power grid interlink system of offshore oil platform
[technical field]
The utility model relates to the electric power system of offshore oil platform, particularly relates to a kind of power grid interlink system of offshore oil platform that the electric power system of a plurality of offshore oil platforms is carried out networking.
[background technology]
At present, the development and utilization to marine resources is all constantly strengthened in countries in the world, particularly to the oil in coastal waters, the development and utilization of natural gas resource.Supply of electric power then is the important step during oil, air to open are sent out.Because marine each oil gas field is wide aparts all mostly, on the mining type, adopt a central platform to build a power station at present both at home and abroad mostly, are the mode of central platform and the power supply of each wellhead platform.There is following problem in this supply power mode:
The first since conventional offshore oil and gas field exploitation pattern to be that each oil gas field central platform is built a power station basically independently-powered, this pattern makes that each oil gas field power supply is single, as do not leave the stand-by generator group, and in case the unit fault will cause the platform dead electricity, the power supply reliability deficiency; All reserve stand-by generator group with the suitable capacity of its load as each platform, electric generation investment will greatly improve, the also corresponding complexity of electrical main connecting wire and power distribution equipment, and power supply takes up space and is multiplied, and the space of oil gas field platform then is limited and valuable.
Two to be units break down easily along with load increases for it, harmonic wave is bigger, and the quality of power supply is relatively poor, and single Oilfield Electric station marginal capacity is not enough, under the startup of powerful devices such as water injection pump, compressor, output pump is impacted, cause whole electric power system big ups and downs easily, and can cause field produces to close down.
It three is that each power station all must possess certain reserve capacity, has caused the repetition of resource distribution.
Exist resource distribution unreasonable in addition, underutilization of resources, operating cost and maintenance cost height, problem such as energy resource consumption is big.
[summary of the invention]
The utility model is intended to address the above problem, make the power of to power mutually between each platform and provide a kind of by the electric power networking, strengthen opposing accident ability, improve each power station power supply reliability, reduce standby unit amount, improve the idle asset utilance, reduce investment outlay and operation expense, effectively reduce the development investment cost of new oil gas field, increase economic efficiency, reduce the power grid interlink system of offshore oil platform of energy resource consumption.
For achieving the above object, the utility model provides a kind of power grid interlink system of offshore oil platform, this system is that a plurality of offshore platforms power station on a plurality of offshore drilling platformses that will be distributed in the marine site is connected by submarine cable, forms a small-sized electric power system of generating electricity by way of merging two or more grid systems.
The mutual distance in a plurality of offshore platforms power station is 10Km~60Km.
Submarine cable is that electric pressure is 35KV, and the cross section is the crosslinked polyetylene insulated sea electric power cable of 3 * (150~250) mm2.
Submarine cable is embedded under the sea bed 0.5~2.5 meter.
Small-sized electric power system comprises the concentrated message management level that are arranged on dispatching management center, power station) and be separately positioned on data acquisition server, power station unit control system, video conference device and corresponding network device on a plurality of offshore platforms power station, video server and corresponding network, video equipment that described concentrated message management level comprise data server and link to each other with data server, the data acquisition server in each offshore platform power station provides data as data source for the concentrated message management level.
A plurality of offshore platforms are respectively equipped with many gas/diesel engine generators and transformer on the power station; be connected by single mother partition wiring between each gas/diesel engine generator and the transformer; be connected by submarine cable by single bus scheme between each offshore platform power station, on the circuit of each both sides, offshore platform power station, respectively be provided with a three-phase optical fiber current differential protection device.
Respectively be provided with an arc suppression coil that carries out condenser current compensation when being used for when any two transformers are out of service, single phase ground fault taking place at the neutral point of each transformer in a plurality of offshore platforms power station.
Be provided with the inhibitor of shoving that the sudden change of avoiding the transformer core magnetic flux produces magnetizing inrush current in the high-pressure side of each transformer in a plurality of offshore platforms power station.
On each offshore platform power station, respectively be provided with a low pressure low-frequency load reduction cabinet, and on each unit in each offshore platform power station, be provided with high all cutter devices.
The controller switching equipment in a plurality of offshore platforms power station is to include bus-bar room, breaker chamber and operating mechanism thereof, low-pressure chamber and the base of band three-station isolating/grounding switch and a plurality of totally enclosed type gas-filled type switch cubicles of cable vault, a plurality of switch cubicles are connected by the insulation copper pipe bus, and a plurality of offshore platforms power station respectively disposes one group of reactor that is used for voltage control and reactive balance, and this reactor is connected with described switch cubicle.
Contribution of the present utility model is, carry out the electric power networking by the independently platform power station that will be dispersed on each offshore drilling platforms, can make full use of the existing generator capacity of each platform, improve the power supply reliability and the economy of platform, solve this platform power maintenance or the accident powerup issue when out of service, save oil field development, production cost, also can effectively reduce the economic threshold of marginal oil field rolling development.After the electric power networking, the load capacity in original power station just can provide electric power for building new oil gas platform in the Oilfield Group future, and the load factor of generating set brings up to 60% can satisfy existing workload demand, and newly-built platform then need not be installed generating set.Simultaneously, at bad weathers such as chance typhoons, when personnel withdraw oil platform, also can realize that the oil field uninterruptedly produce by distant place control device control of electrical equipment switching.After the electric power networking, under each oil field ordinary production situation of guarantee, can reduce the unit quantity in platform operation power station, save the maintenance cost and the production cost in oil field effectively.Implement the electric power networking and will improve power supply reliability, the operation of stabilizing the economy of guarantee production safety.
[description of drawings]
Fig. 1 is a system architecture diagram of the present utility model.
Fig. 2 is the bottom cable laying schematic diagram.
[embodiment]
The following example is to further explanation of the present utility model and explanation, and the utility model is not constituted any limitation.
Consult Fig. 1, Fig. 2, power grid interlink system of offshore oil platform of the present utility model comprises a plurality of offshore drilling platformses 10, a plurality of offshore platforms power station 20 and many submarine cables 30.Wherein, described a plurality of offshore drilling platforms 10 is for being distributed in the oil drilling platform of a different location in the offshore sea waters.Present embodiment is an example with southwest, Zhanjiang sea area Wei, Guangdong Oilfield Group, and it comprises four oil drilling platforms 10 that are arranged on first oil field 11, Weizhou, second oil field 12, Weizhou, the 3rd oil field 13, Weizhou, the 4th oil field 14, Weizhou and the oil drilling platform 15 that is arranged on Weizhou terminal factory.On five oil drilling platforms 10, be respectively equipped with offshore platform power station 21,22,23,24,25.Before networking, four offshore platform power stations 20 and terminal power station, a Weizhou are all built up, its installed capacity is respectively 3X4281kW (gas turbine generator group), 3X3040kW, 2X2365kW and 2X2834kW, and each power station provides electric power for central platform, the wellhead platform of this oil gas field independently.Each power station unit all is the double fuel unit, can use diesel oil and natural gas to act as a fuel, and natural gas then is the gas well gas and the associated gas in oil field.Wherein three oil field terminals in the Oilfield Group of Wei southwest are totally nine generators, but only five of the generating sets that puts into operation, four units are standby, percentage reserve is 45%, nine units 35635KW that can power, but the only 12689KW that loads, load factor only 36%, total power more than needed accounts for 64% of total specified power.
Main points of the present utility model are, between each offshore platform power station, respectively lay a submarine cable 30, a plurality of offshore platforms power station 21,22,23,24,25 on a plurality of offshore drilling platformses 10 is connected, constitutes the small-sized electric power system 100 of generating electricity by way of merging two or more grid systems of chain type.
In the present embodiment, the electric pressure of these small-sized electric power system 100 networking basic routing lines adopts 35kV, and the transmission power of submarine cable 30 is S=19524KVA (322A).The distance that the oil drilling platform of the oil drilling platform in first oil field 11 and Weizhou terminal factory is 15 is 32.5Km, and the distance that the oil drilling platform in first oil field 11 and second oil field are 12 is 18.3Km.The submarine cable 30 that is laid between each offshore platform power station is that the cross section is the fiber optic cables of 3 * 185mm2.This submarine cable 30 adopts general 35KVXLPE insulation sea electric power cable, in the present embodiment, SCCF-YJQF4126/35kV 3 * 185mm2+24B1 seabed composite cable that submarine cable selects for use east, Ningbo cable factory to produce, it is the sea electric power cable that copper three cores, XLPE insulation, three-phase phase-splitting sheath, PE outer jacket, wire armoring, polypropylene rope drape over one's shoulders multiple complex light unit outward.As shown in Figure 2, the marine part of described submarine cable 30 is imbedded under the sea bed about 2 meters, adds the cable protection protection of pipe in suspicious reef district.The shoal is partly with imbedding following 1 meter of sea bed behind the protection of submarine cable protection of pipe.
Be respectively equipped with many gas/diesel engine generators and transformer on a plurality of offshore platforms power station 20, in the present embodiment, offshore platform power station 25 original 4 4284kW gas/diesel engine generators of Weizhou terminal factory, be connected to the 6kV bus, 6kV adopts single mother partition wiring, has set up two 12500kVA dry-type transformers after the networking, boost to 35kV, be connected by the offshore platform power station 21 of submarine cable 30 with first oil field 11, the 35kV submarine cable adopts single bus scheme, and distant view is reserved an outlet.Offshore platform power station 21 original 3 4284kW gas/diesel engine generators, be connected to the 6kV bus, 6kV adopts single mother partition wiring, set up a 16000kVA dry-type transformer after the networking, boost to 35kV, link to each other with offshore platform power station 25 and offshore platform power station 22 by submarine cable 30, the 35kV submarine cable adopts single bus scheme.Offshore platform power station 22 original 2 2834kW gas/diesel engine generators are connected to the 6kV bus, and 6kV adopts single mother partition wiring, connects with offshore platform power station 22-1N by the 6kV submarine cable.At sea platform power station 22-1N is provided with a 12500kVA dry-type transformer, boosts to 35kV, is connected with offshore platform power station 21 by submarine cable, and the 35kV submarine cable adopts single bus scheme, and distant view is reserved an outlet.
The controller switching equipment in a plurality of offshore platforms power station 20 is a totally enclosed type gas-filled type switch cubicle (not shown), and in this enforcement, the gas-filled type switch cubicle is a 35KV gas-filled type switch cubicle, its commercially available acquisition.This 35KV gas-filled type switch cubicle includes bus-bar room, breaker chamber and operating mechanism thereof, low-pressure chamber and base and the cable vault of band three-station isolating/grounding switch.The rated voltage of this 35KV gas-filled type switch cubicle is 40.5kV, and nominal voltage of a system is 35kV, and rated frequency is 50Hz, and rated current is 1250A.The rated short circuit drop-out current of vacuum circuit-breaker is 25kA, opening time is 35-55ms, closing time is 40-70ms, branch/closing coil electric current is 0.8A, divide/closing a floodgate not is≤2ms the same period, and boost voltage is 220V DC, and nominal operation is O-0.3s-CO-180s-CO in proper order, specified short time withstand current 4s is 25kA, boost voltage: 220VDC.Bus-bar room adopts three-phase coenosarc, round tubular bus single busbar system, and specified short time withstand current is 4s:25kA.A plurality of switch cubicles are connected by the insulation copper pipe bus, and a plurality of offshore platforms power station 20 respectively disposes one group of reactor that is used for voltage control and reactive balance, and this reactor is connected with described switch cubicle.The cable connected mode of this 35KV gas-filled type switch cubicle is tapered in adopting, and it adopts the 3# cable plug that submarine cable 30 directly is connected with switch cubicle, does not need extra large cable junction box, has saved big quantity space.
On the circuit of each 20 both sides, offshore platform power station, respectively be provided with a three-phase optical fiber current differential protection device (not shown); the commercially available acquisition of this current differential protection device; require it except that possessing three-phase current differential protection function; also should have three sections phase spacings and ground distance protection, four sections zero sequence direction current protecting function.
The capacitance current of generation single phase ground fault can both be compensated when guaranteeing that wantonly two transformers are out of service, neutral point at each transformer in a plurality of offshore platforms power station 20 respectively is provided with an arc suppression coil (not shown), specifically, two main transformer 35kV neutral points in the offshore platform power station 25 of Weizhou terminal factory are respectively established an arc suppression coil, establish an arc suppression coil at the main transformer 35kV neutral point of the offshore platform power station in first oil field 11 21 platforms.This makes the capacitance current that single phase ground fault takes place when two transformers in office are out of service to be compensated, and system can be operated with failure 1~2 hour.
For the sudden change of avoiding the transformer core magnetic flux produces magnetizing inrush current, high-pressure side at each transformer in a plurality of offshore platforms power station 20 is provided with the inhibitor (not shown) of shoving, the polarity of magnetic circuit remanent magnetism was known at the separating brake phase angle of voltage when this inhibitor was cut off the power supply by transformer, be chosen in close phase angle next time when closing a floodgate, thereby avoid the sudden change of transformer core magnetic flux to produce magnetizing inrush current.
On each offshore platform power station 20, respectively be provided with a low pressure low-frequency load reduction cabinet (not shown), and on each unit in each offshore platform power station, be provided with high all cutter device (not shown)s, to guarantee the safe and stable operation of electrical network.
As shown in Figure 1, described small-sized electric power system 100 comprises the concentrated message management level 101 that are arranged on dispatching management center, power station and is separately positioned on data acquisition server 201, power station unit control system 202, video conference device 203 and corresponding network device 204 on a plurality of offshore platforms power station 20.Wherein, video server 1012 and corresponding network, video equipment 1013 that described concentrated message management level 101 comprise data server 1011 and link to each other with data server, being configured to of its data server 1011: processor 2.66GHz (2M cache), 2GB DDR internal memory, 2X72G hot plug hard disk/CD, 10/100/1000M network interface card, duplicate supply, realize data processing and storage, hard-disk capacity 250G by disposing a shared disk array.Described network, video equipment 1013 comprise the network equipment and video server, and wherein, the network equipment is the universal network equipment that is connected on the data communication network, and its communication speed should satisfy the system real time requirement, and is not less than 1Mbps.When occurring certain mistake in the data communication network, system should take safety measures automatically, as these data of automatic request for repetition, excise faulty equipment or switch to redundant devices etc.Video server is multipoint controller (MCU), and it supports the 720p high definition, is provided with 40 road video points and 32 road audio frequency point, supports h.264 standard, supports the Firewall Traversing technology.Concentrated message management level 101 also are provided with meeting-place video conference terminal and leader's desktop conference terminal, the meeting-place video conference terminal is supported the 720p high definition, can realize two-way video or H.239, can watch speech content and speechmaker simultaneously, connect 4 road videos and 3 road audio frequency.Leader's desktop conference terminal is supported the 720p high definition, supports IP (H.323 and SIP), up to 2Mbps, shares the computer demonstration, can connect 4 road videos and 3 road audio frequency simultaneously, guarantees the meeting fail safe.Be arranged on being configured to of data acquisition server 201 on a plurality of offshore platforms power station 20: processor 2.66GHz (2M cache), 2GB DDR internal memory, 2X72G hot plug hard disk/CD, 10/100/1000M network interface card, duplicate supply, realize data processing and storage, hard-disk capacity 250G by disposing a shared disk array.The data acquisition server 201 in each offshore platform power station provides data as data source for concentrated message management level 101.Power station unit control system 22 adopts the MK II power station unit control system of Siemens Company.Video conference device 23 is supported the 720p high definitions, can realize two-way video or H.239, can watch speech content and speechmaker simultaneously, connects 4 road videos and 3 road audio frequency.The network equipment 24 is for being connected to the universal network equipment on the data communication network, and its communication speed should satisfy the system real time requirement, and is not less than 1Mbps.When occurring certain mistake in the data communication network, system should take safety measures automatically, as these data of automatic request for repetition, excise faulty equipment or switch to redundant devices etc.The offshore platform power station also is provided with leader's desktop conference terminal, and this terminal is supported the 720p high definition, supports IP (H.323 and SIP), up to 2Mbps, shares the computer demonstration, can connect 4 road videos and 3 road audio frequency simultaneously, guarantees the meeting fail safe.
Although the utility model is disclosed by above embodiment; but scope of the present utility model is not limited thereto; do not departing under the condition of the utility model design, any conspicuous change that it is done all will fall into the protection range of claim of the present utility model.

Claims (10)

1. power grid interlink system of offshore oil platform, it is characterized in that, a plurality of offshore platforms power station (20) on a plurality of offshore drilling platformses (10) that are distributed in the marine site is connected by submarine cable (30), forms a small-sized electric power system (100) of generating electricity by way of merging two or more grid systems.
2. power grid interlink system of offshore oil platform as claimed in claim 1 is characterized in that, the mutual distance in described a plurality of offshore platforms power stations (20) is 10Km~60Km.
3. power grid interlink system of offshore oil platform as claimed in claim 1 is characterized in that, described submarine cable (30) is that electric pressure is 35KV, and the cross section is the crosslinked polyetylene insulated sea electric power cable of 3 * (150~250) mm2.
4. power grid interlink system of offshore oil platform as claimed in claim 3 is characterized in that, described submarine cable (30) is embedded under the sea bed 0.5~2.5 meter.
5. power grid interlink system of offshore oil platform as claimed in claim 1, it is characterized in that, described small-sized electric power system (100) comprises the concentrated message management level (101) that are arranged on dispatching management center, power station and is separately positioned on data acquisition server (201) on a plurality of offshore platforms power station (20), power station unit control system (202), video conference device (203) and corresponding network device (204), described concentrated message management level (101) comprise data server (1011) and video server (1012) that links to each other with data server and corresponding network, video equipment (1013), the data acquisition server in each offshore platform power station (201) are that concentrated message management level (101) provide data as data source.
6. power grid interlink system of offshore oil platform as claimed in claim 5; it is characterized in that; be respectively equipped with many gas/diesel engine generators and transformer on described a plurality of offshore platforms power stations (20); be connected by single mother partition wiring between each gas/diesel engine generator and the transformer; be connected by submarine cable (30) by single bus scheme between each offshore platform power station (20), on the circuit of each both sides, offshore platform power station (20), respectively be provided with a three-phase optical fiber current differential protection device.
7. power grid interlink system of offshore oil platform as claimed in claim 6, it is characterized in that, respectively be provided with an arc suppression coil that carries out condenser current compensation when being used for when any two transformers are out of service, single phase ground fault taking place at the neutral point of each transformer in a plurality of offshore platforms power station (20).
8. power grid interlink system of offshore oil platform as claimed in claim 7 is characterized in that, is provided with the inhibitor of shoving that the sudden change of avoiding the transformer core magnetic flux produces magnetizing inrush current in the high-pressure side of each transformer in a plurality of offshore platforms power station (20).
9. power grid interlink system of offshore oil platform as claimed in claim 8 is characterized in that, respectively is provided with a low pressure low-frequency load reduction cabinet on each offshore platform power station (20), and is provided with high all cutter devices on each unit in each offshore platform power station.
10. power grid interlink system of offshore oil platform as claimed in claim 9, it is characterized in that, the controller switching equipment in described a plurality of offshore platforms power stations (20) is to include bus-bar room, breaker chamber and operating mechanism thereof, low-pressure chamber and the base of band three-station isolating/grounding switch and a plurality of totally enclosed type gas-filled type switch cubicles of cable vault, a plurality of switch cubicles are connected by the insulation copper pipe bus, and a plurality of offshore platforms power station (20) respectively disposes one group of reactor that is used for voltage control and reactive balance, and this reactor is connected with described switch cubicle.
CN 201020298256 2010-08-19 2010-08-19 Power network system of offshore oil platforms Expired - Lifetime CN201781279U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101917005A (en) * 2010-08-19 2010-12-15 中国海洋石油总公司 Power grid interlink system of offshore oil platform
US11955782B1 (en) 2022-11-01 2024-04-09 Typhon Technology Solutions (U.S.), Llc System and method for fracturing of underground formations using electric grid power

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101917005A (en) * 2010-08-19 2010-12-15 中国海洋石油总公司 Power grid interlink system of offshore oil platform
US11955782B1 (en) 2022-11-01 2024-04-09 Typhon Technology Solutions (U.S.), Llc System and method for fracturing of underground formations using electric grid power

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Granted publication date: 20110330