CN106099410B - Long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation system and method - Google Patents
Long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation system and method Download PDFInfo
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- CN106099410B CN106099410B CN201610495447.XA CN201610495447A CN106099410B CN 106099410 B CN106099410 B CN 106099410B CN 201610495447 A CN201610495447 A CN 201610495447A CN 106099410 B CN106099410 B CN 106099410B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/58—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation characterised by the form or material of the contacting members
- H01R4/66—Connections with the terrestrial mass, e.g. earth plate, earth pin
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Abstract
Long oil and gas pipeline high pressure of the present invention/extra-high voltage direct-current interference mitigation system and method is related to a kind of for alleviating long oil and gas pipeline high pressure/extra-high voltage direct-current interference system and method.Its purpose is to provide a kind of cost-effective long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation system and method.Alleviation system in the present invention includes alleviating groundbed (1), cable (2), the two-way forced electric drainage (3) of intelligence and control reference electrode (4).Alleviation method in the present invention includes the following steps: that (1) carries out field research to long oil and gas pipeline and high pressure/extra-high voltage DC transmission system earthing pole；(2) the pipe to soil potential offset of long oil and gas pipeline is tested；(3) according to test result, alleviation system is installed in pipe to soil potential offset larger position；(4) alleviate system after the installation is completed, the inspection before booting up, after confirmation is errorless, the two-way forced electric drainage of starting intelligence.
Description
Technical field
The present invention relates to long oil and gas pipeline fields, more particularly to one kind for alleviating long oil and gas pipeline high pressure/spy
The system and method for high voltage direct current interference.
Background technique
With a series of national Major Strategics such as the Belt and Road, " Jing-jin-ji region cooperative development " and " Yangtze River Zone "
It proposes, oil and gas pipeline, high pressure/extra high voltage direct current transmission line have stepped into the large-scaled construction period.It is defeated with high-voltage alternating
Electric line is different, and high pressure/extra-high voltage DC transmission system includes direct current grounding pole, and has bipolar operation and two kinds of monopolar operation fortune
Line mode.
Under normal conditions, high pressure/extra-high voltage DC transmission system uses bipolar operation.The bipolar method of operation is using positive and negative
Two polar conductors are connected with the positive and negative polarities of both ends converter station, constitute DC loop.When normal operation, the path of DC current is positive
Minus two polar curves.But in actual motion, the size of current in positive and negative polarities line is often had a certain difference, so as to cause part
Electric current is too greatly flowed back to negative sense earthing pole from positive earthing pole.If nearby there are long oil and gas pipelines for earthing pole, can be to pipe
Cause DC influence in road.When high pressure/extra high voltage direct current transmission line breaks down, then monopolar operational mode can be automatically turned on.
In monopolar operation, the monopole circuit of a conducting wire and the earth composition direct current.It is defeated that direct current is equivalent under this mode greatly
A piece conducting wire of electric line, flow through it electric current be DC transmission engineering running current, therefore enter ground stray electrical current numerical value be
Output electric current in transmission line of electricity, the electric current is up to kilo-ampere in the actual process.Shadow of the electric current to long oil and gas pipeline
Sound intensity is big, coverage is wide, seriously affects the normal operation of buried pipeline cathodic protection system, and it is defeated that oil gas length has been significantly greatly increased
The risks such as pipeline anticorrosion coating removing, hydrogen embrittlement, corrosion leakage even explosion.Therefore, long oil and gas pipeline high pressure/extra-high voltage direct-current is dry
The alleviation disturbed is very urgent.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of cost-effective long oil and gas pipeline high pressure/extra-high voltage direct-currents
Interference mitigation system and method improves long oil and gas pipeline and nearby height to reduce long oil and gas pipeline DC influence risk
Environmentally protective, comfortable safe energy source pathway is created in the safety of the communal facilitys such as pressure/extra-high voltage DC transmission system.
Long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation system in the present invention, including alleviate groundbed, cable,
The two-way forced electric drainage of intelligence and control reference electrode, the groundbed of alleviating pass through the sun of cable and the two-way forced electric drainage of intelligence
The connection of pole binding post, the long oil and gas pipeline are connect by cable with the cathode terminal of the two-way forced electric drainage of intelligence, institute
It states control reference electrode and is connect by cable with the control reference electrode binding post of the two-way forced electric drainage of intelligence, the intelligence is double
It is connect to the cathodic protection station binding post of forced electric drainage by cable with cathodic protection station.
Long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation system in the present invention, wherein the alleviation groundbed
Form is horizontal zinc band groundbed, distributed groundbed, deepwell ground bed or grounded screen.
Long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation system in the present invention, wherein the alleviation groundbed
Material is zinc anode, magnesium anode, zinc-plated band iron or steel scrap pipe.
Long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation system in the present invention, wherein the control reference is electric
Pole is set as 3, and the control reference electrode binding post of the two-way forced electric drainage of intelligence is also set as 3,3 control reference electrodes
It is connected one to one respectively by cable and 3 control reference electrode binding posts.
Long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation system in the present invention, wherein the control reference is electric
The potential fluctuation amplitude of pole is no more than ± 5mV.
Long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation method in the present invention, includes the following steps:
(1) field research is carried out to long oil and gas pipeline and high pressure/extra-high voltage DC transmission system earthing pole, understands fully and connects
Relative position, ambient enviroment, earthing pole running parameter, pipeline foundation data and its disturbed condition between earth polar and pipeline；
(2) the pipe to soil potential offset of long oil and gas pipeline is tested；
(3) described in any item slow in the larger position installation claim 1-5 of pipe to soil potential offset according to test result
Solution system；
(4) after the installation is completed, the inspection before booting up after confirmation is errorless, starts intelligent bidirectional strength to the alleviation system
Electric drainager processed, alleviation system enter normal operating condition.
Long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation method in the present invention, wherein in the step (3),
The alleviation system during installation, select alleviate groundbed form and material after, according to the finding of step (1), to oil gas
Long distance pipeline and earthing pole carry out mathematical modeling and physical modeling, carry out high pressure/extra-high straightening using numerical simulation calculation technology
The alleviation design disturbed that drains off is interfered so that it is determined that alleviating the quantity and specific installation site of groundbed according to high pressure/extra-high voltage direct-current
Alleviation design result, choose cable and the two-way electric drainager model of intelligence.
Long oil and gas pipeline high pressure of the present invention/extra-high voltage direct-current interference mitigation system and method has filled up high both at home and abroad at present
Pressure/extra-high voltage direct-current interference mitigation field blank, and alleviate high-efficient, economically feasible, for ensure long oil and gas pipeline and
The safety of the communal facilitys such as neighbouring high pressure/extra-high voltage DC transmission system has very important significance.Meanwhile it can also alleviate height
Pressure/extra-high voltage direct-current transmission engineering builds the contradiction between long oil and gas pipeline construction.
The present invention will be further explained below with reference to the attached drawings.
Detailed description of the invention
Fig. 1 is long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation system structural schematic diagram in the present invention；
Fig. 2 is long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation system mounting location selection in the present invention
Schematic diagram (transmission system earthing pole is in the seal side for being disturbed pipeline)；
Fig. 3 is long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation system mounting location selection in the present invention
Schematic diagram (transmission system earthing pole is in the interlude for being disturbed pipeline).
Specific embodiment
As shown in Figure 1, long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation system in the present invention includes alleviating ground
Bed 1, cable 2, the two-way forced electric drainage 3 of intelligence and control reference electrode 4, the alleviation groundbed 1 are two-way by cable 2 and intelligence
The anode terminal 8 of forced electric drainage 3 connects, and the long oil and gas pipeline passes through cable 2 and the two-way forced electric drainage 3 of intelligence
Cathode terminal 6 connects, the control reference electrode that the control reference electrode 4 passes through cable 2 and the two-way forced electric drainage 3 of intelligence
Binding post 5 connects, and the cathodic protection station binding post 7 of the two-way forced electric drainage 3 of intelligence is connect by cable 2 with cathodic protection station.
In order to ensure alleviating the safety of system, it is defeated that the nominal load current of cable 2 must be over high pressure/extra-high voltage direct-current
Alleviate the maximum output current of groundbed 1 when electric system earthing pole discharges.
The form for alleviating groundbed 1 is horizontal zinc band groundbed, distributed groundbed, deepwell ground bed or grounded screen.It is described slow
The material for solving groundbed 1 is zinc anode, magnesium anode, zinc-plated band iron or steel scrap pipe.
The control reference electrode 4 is set as 3, the control reference electrode binding post 5 of the two-way forced electric drainage 3 of intelligence
Also 3 are set as, 3 control reference electrodes 4 control reference electrode binding post 5 by cable 2 and 3 respectively and connect one to one.
The potential fluctuation amplitude of the control reference electrode 4 is no more than ± 5mV, and the service life was at 20 years or more.
Due to high pressure/extra-high voltage DC transmission system earthing pole course of discharge uncertainty, cause to be disturbed pipeline section
Both forward migration may occur for one position it can also happen that negative offset.In order to ensure pipeline above earth potential always can be in safety
In range, the two-way forced electric drainage 3 of intelligence can carry out positively and negatively bidirectional output according to current potential feedback automatically.
Long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation method in the present invention, includes the following steps:
(1) field research is carried out to long oil and gas pipeline and high pressure/extra-high voltage DC transmission system earthing pole, understands fully and connects
Relative position, ambient enviroment, earthing pole running parameter, pipeline foundation data and its disturbed condition between earth polar and pipeline；
(2) the pipe to soil potential offset of long oil and gas pipeline is tested；
(3) according to test result, the long oil and gas pipeline in the larger position installation present invention of pipe to soil potential offset is high
Pressure/extra-high voltage direct-current interference mitigation system；
(4) after the installation is completed, the inspection before booting up after confirmation is errorless, starts intelligent bidirectional strength to the alleviation system
Electric drainager 3 processed, alleviation system enter normal operating condition.
Long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation method in the present invention, wherein in the step (3),
The alleviation system during installation, select alleviate groundbed 1 form and material after, according to the finding of step (1), to oil gas
Long distance pipeline and earthing pole carry out mathematical modeling and physical modeling, carry out high pressure/extra-high straightening using numerical simulation calculation technology
Drain off the alleviation design disturbed, so that it is determined that alleviate the quantity and specific installation site of groundbed 1, it is dry according to high pressure/extra-high voltage direct-current
The alleviation design result disturbed chooses cable 2 and two-way 3 model of electric drainager of intelligence.
When carrying out mathematical modeling and physical modeling to long oil and gas pipeline and earthing pole, be by Beasy software and
CDEGS software realization, i.e., the result that investigation obtains in step (1) is input in above two software and is modeled, this two
Kind software is the popular software of this field, and it will not be described here for specifically used process.
Long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation method in the present invention, wherein in the step (2),
Larger position (the i.e. alleviation system of pipe to soil potential offset is determined in the pipe to soil potential offset for testing long oil and gas pipeline
Installation site) when, if transmission system earthing pole changes with the relative position for being disturbed pipeline, pipe to soil potential is inclined
The larger position of shifting amount also can correspondingly change.
As shown in Fig. 2, test is with obtaining pipe when transmission system earthing pole is in the seal side for being disturbed pipeline
The case where current potential edge is disturbed the changing rule of pipeline mileage, this changing rule is suitable for transmission system earthing pole cathodic discharge,
Forward migration or negative offset can be occurred by being disturbed above earth potential along pipeline, and there are the separations in a potential shift direction
A, needs respectively that the larger position of pipeline above earth potential offset is (respectively such as section (respectively A sections and B sections) before and after separation a at this time
B point and c point in Fig. 2) at install alleviation system.
As shown in figure 3, test obtains pipe to soil potential edge when transmission system earthing pole is in the interlude for being disturbed pipeline
Be disturbed the changing rule of pipeline mileage, this changing rule be suitable for transmission system earthing pole cathodic discharge the case where, be disturbed
Forward migration or negative offset can also occur for above earth potential along pipeline, but unlike a kind of upper situation, can exist at this time
Two potential shift direction separations, respectively a and b need segment pipe (the respectively A before and after separation a and b respectively at this time
Section and C section) and the biggish position of the two interlude (B sections) pipeline above earth potential offset (the c point such as in Fig. 3, d point respectively
And e point) installation alleviation system.
High pressure/extra-high voltage direct-current in the present invention alleviates high pressure/extra-high voltage direct-current that method is suitable for long oil and gas pipeline
The alleviation of interference.Before carrying out high pressure/extra-high voltage direct-current and alleviating, first pipeline and high pressure/extra-high voltage DC transmission system are connect
Earth polar carries out detailed field research, understands fully the relative position between earthing pole and pipeline, ambient enviroment, earthing pole work ginseng
Number, pipeline foundation data and its disturbed condition etc..If earthing pole is in the seal side for being disturbed pipeline, as described in Figure 2,
It is needed at this time according to field test data, in the larger position of pipe to soil potential offset, (the b point and c point such as in Fig. 2 respectively) is carried out
High pressure/extra-high voltage direct-current interference alleviation design.If earthing pole is in the interlude of disturbed pipeline, as shown in figure 3, needing at this time
It to be carried out according to fieldtesting results at the larger position of pipe to soil potential offset (c point, d point and e point in respectively Fig. 3)
High pressure/extra-high voltage direct-current interference alleviation design.High pressure/extra-high voltage direct-current interference design includes alleviating the choosing of 1 form of groundbed
It selects, the selection of alleviating groundbed material, the determination for alleviating groundbed quantity and installation site, cable 2 and two-way 3 model of electric drainager of intelligence
Selection etc..
Wherein the selection for alleviating 1 form of groundbed needs to comprehensively consider pipeline local environment and difference alleviates groundbed 1
Remission effect；The selection for alleviating 1 material of groundbed needs to combine two aspect of the projected life for alleviating groundbed 1 and economy.It is selected slow
After solving 1 form of groundbed and material, according to fieldtesting results, mathematical modeling and physical modeling is carried out, numerical simulation calculation is utilized
Technology carries out high pressure/extra-high voltage direct-current interference alleviation design, so that it is determined that alleviating quantity, the specific installation site of groundbed 1.Together
When, according to high pressure/extra-high voltage direct-current interference mitigation design result, choose the model of cable 2 and the two-way electric drainager 3 of intelligence.Then,
It constructs according to mitigation scheme.After the completion of alleviating the construction of groundbed 1, groundbed 1 will be alleviated and pass through cable 2 and the two-way pressure row of intelligence
The anode terminal 8 for flowing device 3 connects, and long oil and gas pipeline is passed through the cathode connection of cable 2 and the two-way forced electric drainage 3 of intelligence
Column 6 connects, and will control reference electrode 4 and is connected by cable 2 and the control reference electrode binding post 5 of the two-way forced electric drainage 3 of intelligence
It connects, the cathodic protection station binding post 7 of the two-way forced electric drainage 3 of intelligence is connect by cable 2 with cathodic protection station.After the completion of connection,
Inspection before booting up.Check it is errorless after, open the two-way forced electric drainage 3 of intelligence, carry out high pressure/extra-high voltage direct-current and alleviate system
The normal operation of system.
Long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation in the present invention is elaborated below by an example
Method:
1) oil pipeline of one section of long 50km, buried depth 3m, 3PE corrosion-inhibiting coating, wall thickness are found by field research early period
10mm, by the interference of ± 500kV HVDC transmission system, HVDC transmission line is grounded polar diameter 1km, is in the pipe
The road position mileage 3km, is 5km away from pipeline vertical range, and maximum discharge current 4.2kA discharges 10 times, electric discharge 1 is small every time for 1 year
When.Test pipeline pipe to soil potential offset after obtain the larger position of pipe to soil potential offset be at pipeline mileage 3km with
At 20km；
2) according to fieldtesting results, installation high voltage direct current alleviates system at pipeline mileage 3km and at 20km.Due to pipe
It is in mountain area along road, is not easy to excavate, tentatively selection deepwell ground bed, groundbed material selection mixed-metal oxides (MMO) anode；
3) according to field research as a result, being built to pipeline and HVDC transmission line earthing pole progress mathematical modeling and physics
Mould carries out the design calculating for alleviating groundbed using numerical simulation calculation technology；
4) according to digital-to-analogue calculated result, 7 mouthfuls of deep-wells, well depth 100m, active length (i.e. sun are made a call at pipeline mileage 3km
Pole length) 70m, diameter 30mm；5 mouthfuls of deep-wells, well depth 80m, active length 50m, diameter 30mm are made a call at 20km；
5) YJV 12/20kV 1 × 70mm2 cable, voltage rating 12/20kV are chosen；Choose the two-way pressure row of intelligence
Flowing device constant potential output control range is -10V~﹢ 10V, and Constant current output control range is -100A~﹢ 100A, is controlled using 3
The intelligent control algorithm of reference electrode integrative feedback processed realizes bidirectional output；The control reference electrode service life of selection is 20 years, electricity
Position fluctuation amplitude is ± 5mV；
6) it after having selected equipment, is purchased according to material list；
7) it according to design scheme, is finished at pipeline mileage 3km with the construction of 20km progress deepwell ground bed, construction respectively
Afterwards, line is carried out according to Fig. 1: alleviation groundbed 1 is connected to the anode terminal 8 of the two-way forced electric drainage 3 of intelligence with cable 2；
Pipeline is connected to the cathode terminal 6 of the two-way forced electric drainage 3 of intelligence with cable 2；Cathodic protection station is connected to intelligence with cable
The cathodic protection station binding post 7 of the two-way forced electric drainage 3 of energy；3 control reference electrodes 4 are two-way by cable 2 and intelligence respectively
3 control reference electrode binding posts 5 of forced electric drainage 3 connect one to one；
8) after connecting, the inspection before booting up.Confirm it is errorless after, the two-way forced electric drainage 3 of starting intelligence enters
The normal service stage.
In order to ensure the communal facilitys such as long oil and gas pipeline and neighbouring high pressure/system for ultra-high voltage transmission and the safety of personnel,
The present invention has used for reference the mitigation technique of conventional DC interference, and it is slow to propose long oil and gas pipeline high pressure/extra-high voltage direct-current interference
Solution technology.Although the mitigation technique that the high pressure/extra-high voltage direct-current interference mitigation technological borrowing is interfered in conventional DC, its technology
It is required that entirely different with the alleviation of conventional DC interference.The selection of the high pressure/extra-high voltage direct-current interference mitigation device installation site
Tightened up compared with conventional DC interference, type and the groundbed material for alleviating groundbed are more diversified, and its drainage equipment must have
The function of standby positively and negatively bidirectional output.
Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made should all be fallen into the protection scope that claims of the present invention determines.
Claims (2)
1. a kind of long oil and gas pipeline high pressure/extra-high voltage direct-current interference mitigation method, which comprises the steps of:
(1) field research is carried out to long oil and gas pipeline and high pressure/extra-high voltage DC transmission system earthing pole, understands fully earthing pole
Relative position, ambient enviroment, earthing pole running parameter, pipeline foundation data and its disturbed condition between pipeline；
(2) the pipe to soil potential offset of long oil and gas pipeline is tested；
(3) according to test result, alleviation system is installed in pipe to soil potential offset larger position, the alleviation system includes alleviating
Groundbed, cable, the two-way forced electric drainage of intelligence and control reference electrode, the alleviation groundbed pass through cable and the two-way pressure of intelligence
The anode terminal of electric drainager connects, the cathode connection that the long oil and gas pipeline passes through cable and the two-way forced electric drainage of intelligence
Column connection, the control reference electrode are connect by cable with the control reference electrode binding post of the two-way forced electric drainage of intelligence,
The cathodic protection station binding post of the two-way forced electric drainage of intelligence is connect by cable with cathodic protection station, the shape for alleviating groundbed
Formula is horizontal zinc band groundbed, distributed groundbed, deepwell ground bed or grounded screen, and the material for alleviating groundbed is zinc anode, magnesium sun
Pole, zinc-plated band iron or steel scrap pipe, the control reference electrode are set as 3, the control reference of the two-way forced electric drainage of intelligence
Electrode terminal is also set as 3, and 3 control reference electrodes pass through cable respectively and 3 control reference electrode binding posts one are a pair of
It should connect, the potential fluctuation amplitude of the control reference electrode is no more than ± 5mV；
(4) the alleviation system after the installation is completed, the inspection before booting up, after confirmation is errorless, arrange by the two-way pressure of starting intelligence
Device is flowed, alleviation system enters normal operating condition.
2. long oil and gas pipeline high pressure according to claim 1/extra-high voltage direct-current interference mitigation method, it is characterised in that:
In the step (3), the alleviation system during installation, select alleviate groundbed form and material after, according to the tune of step (1)
It grinds as a result, utilizing numerical simulation calculation technology to carry out long oil and gas pipeline and earthing pole progress mathematical modeling and physical modeling
The alleviation design of high pressure/extra-high voltage direct-current interference, so that it is determined that alleviate the quantity and specific installation site of groundbed, according to high pressure/
The alleviation design result of extra-high voltage direct-current interference chooses cable and the two-way electric drainager model of intelligence.
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| CN107805816B (en) * | 2017-10-25 | 2018-12-07 | 中国石油工程建设有限公司 | It is a kind of for inhibiting the automatic frequency-conversion cathodic protection station prosecutor method of subway DC influence |
| CN113701062B (en) * | 2020-05-21 | 2023-11-28 | 中国石油天然气股份有限公司 | Method and device for monitoring perforation and oil and gas theft of oil and gas pipeline |
| CN112054460A (en) * | 2020-08-07 | 2020-12-08 | 深圳供电局有限公司 | Tower system |
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