CN109066626B - The drainage method and stream discharging system of pipeline - Google Patents
The drainage method and stream discharging system of pipeline Download PDFInfo
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- CN109066626B CN109066626B CN201810991580.3A CN201810991580A CN109066626B CN 109066626 B CN109066626 B CN 109066626B CN 201810991580 A CN201810991580 A CN 201810991580A CN 109066626 B CN109066626 B CN 109066626B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
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Abstract
This application provides the drainage methods and stream discharging system of a kind of pipeline, are related to Oil & Gas Storage pipe technology field.Method includes: to determine that there are when fault current on pipeline according to the first voltage that the second choke elements export in fault current detection module; fault current detection module controls the ground terminal that the fault current that the first choke elements export is drained to cathodic protection ground connection by fault current drainage module, so that the second choke elements output first voltage is reduced to second voltage；Pipeline voltage essence control module is determined according to second voltage needs isolation voltage to be achieved to mismatch on current voltage and pipeline on pipeline; the current flow that first choke elements export is drained to the ground terminal of cathodic protection ground connection by control direct current drainage module, so that current voltage is matched with isolation voltage.Pipeline voltage essence control module improves cathodic protection effect by the current voltage control on pipeline to matching with isolation voltage by accurate drainage again.
Description
Technical field
This application involves Oil & Gas Storage pipe technology fields, in particular to a kind of drainage method of pipeline and drainage
System.
Background technique
The needs of economic development based on China have built a large amount of Oil & Gas Storage pipeline.Since pipeline is mostly metal
Material, because of weather or artificially etc., factors just will receive various alternating current-direct currents interference to pipeline, and alternating current-direct current interference can then make pipeline
At electrochemical corrosion.For the electrochemical corrosion for slowing down pipeline, it is necessary to be interfered the alternating current-direct current on pipeline by way of drainage
Discharge.
Currently, although existing drainage method can be after drainage, so that the voltage on pipeline reduces.But reduced voltage is
The determination according to drainage situation, for example, drainage is more, reduced voltage is just lower, conversely, then higher.It can thus lead
Cause voltage on pipeline unstable, so that cathodic protection is ineffective.
Summary of the invention
The application is to provide the drainage method and stream discharging system of a kind of pipeline, to effectively improve drawbacks described above.
To achieve the goals above, embodiments herein is accomplished in that
In a first aspect, the embodiment of the present application provides a kind of drainage method of pipeline, it is applied to stream discharging system, the drainage
System includes: the first choke elements connecting with pipeline, the second choke elements connecting with first choke elements, and described
The fault current drainage module and direct current drainage module of first choke elements connection, and connect with second choke elements
Fault current detection module and pipeline voltage essence control module.The described method includes: in the fault current detection module according to institute
The first voltage for stating the output of the second choke elements determines on the pipeline there are when fault current, the fault current detection module
It controls the fault current drainage module fault current that first choke elements export is drained into cathodic protection and connect
The ground terminal on ground, so that second choke elements export the first voltage and are reduced to second voltage；The pipeline voltage essence control
Module is determined according to the second voltage needs isolation voltage to be achieved not on current voltage and the pipeline on the pipeline
Matching, controls the direct current drainage module current flow that first choke elements export is drained to cathodic protection and connect
The ground terminal on ground, so that the current voltage is matched with the isolation voltage.
In some optional implementations of first aspect, the pipeline voltage essence control module is according to described
Two voltages determine needs isolation voltage to be achieved to mismatch on current voltage and the pipeline on the pipeline, controls described straight
The current flow that first choke elements export is drained to the ground terminal of cathodic protection ground connection by stream drainage module, comprising:
The pipeline voltage essence control module judges whether the second voltage matches with preset reference voltage；If it is not, the pipeline electricity
Pressure essence control module determines needs isolation voltage to be achieved to mismatch on current voltage and the pipeline on the pipeline；The pipe
Road voltage essence control module controls the current electricity on the pipeline that the direct current drainage module exports first choke elements
Stream drains to the ground terminal of cathodic protection ground connection；The current flow is drained into cathodic protection ground connection in the direct current drainage module
Ground terminal during, the pipeline voltage essence control module continue to judge the second voltage whether with it is described preset with reference to electricity
Pressure matching；If so, the pipeline voltage essence control module, which controls the direct current drainage module, stops drainage, so that the current voltage
It is matched with the isolation voltage.
In some optional implementations of first aspect, the fault current detection module control event
Barrier electric current drainage module by the fault current that first choke elements exports drain to cathodic protection be grounded ground terminal it
Before, which comprises the fault current detection module judges whether the first voltage of the second choke elements output is big
In preset normal voltage threshold value, wherein the normal voltage threshold value is identical as second voltage；If so, the fault current inspection
It surveys module and determines that there are fault currents on the pipeline.
In some optional implementations of first aspect, the stream discharging system further include: be connected to the pipeline with
Surge drainage module between first choke elements；The method also includes: it is greater than the surge in the current voltage
When the preset starting voltage of drainage module, the surge drainage module is changed into low-resistance by high-impedance state according to the current voltage
The current flow is drained to the ground terminal of cathodic protection ground connection by state, so that the current voltage reduces；In the current voltage
When lower than the starting voltage, the surge drainage module is changed into high-impedance state by low resistance state further according to the current voltage.
In some optional implementations of first aspect, the stream discharging system further include: with the first chokes member
The exchange drainage module of part connection, the method also includes: what the exchange drainage module exported first choke elements
AC influence electric current drains to the ground terminal of cathodic protection ground connection on the pipeline.
Second aspect, the embodiment of the present application provide a kind of stream discharging system, comprising: the first chokes member connecting with pipeline
Part, the second choke elements being connect with first choke elements, the fault current drainage being connect with first choke elements
Module and direct current drainage module, and the fault current detection module and pipeline voltage essence control that are connect with second choke elements
Module.It is determined in the fault current detection module according to the first voltage that second choke elements export and is deposited on the pipeline
In fault current, the fault current detection module, for controlling the fault current drainage module for first chokes
The fault current of element output drains to the ground terminal of cathodic protection ground connection, so that second choke elements output described the
One voltage is reduced to second voltage.The pipeline voltage essence control module, for determining the pipeline according to the second voltage
Current voltage and the pipeline on need isolation voltage to be achieved to mismatch, control the direct current drainage module for described first
The current flow of choke elements output drains to the ground terminal of cathodic protection ground connection, so that the current voltage is isolated with described
Voltage matches.
In some optional implementations of second aspect, the pipeline voltage essence control module is also used to judge described
Whether second voltage matches with preset reference voltage.If it is not, the pipeline voltage essence control module determines working as on the pipeline
Isolation voltage to be achieved is needed to mismatch on preceding voltage and the pipeline；The direct current drainage module is controlled by first chokes
Current flow on the pipeline of element output drains to the ground terminal of cathodic protection ground connection.In the direct current drainage module by institute
During stating the ground terminal that current flow drains to cathodic protection ground connection, continue to judge whether the second voltage is preset with described
Reference voltage matching.If so, controlling the direct current drainage module stops drainage, so that electricity is isolated with described in the current voltage
Pressure matching.
In some optional implementations of second aspect, the fault current detection module is also used to judge described
Second choke elements output first voltage whether be greater than preset normal voltage threshold value, wherein the normal voltage threshold value with
Second voltage is identical；If so, the fault current detection module determines that there are fault currents on the pipeline.
In some optional implementations of second aspect, the stream discharging system further include: be connected to the pipeline with
Surge drainage module between first choke elements.It is opened in the current voltage greater than the surge drainage module is preset
When dynamic voltage, the surge drainage module will be described current for being changed into low resistance state by high-impedance state according to the current voltage
Electric current drains to the ground terminal of cathodic protection ground connection, so that the current voltage reduces.It is lower than the starting in the current voltage
When voltage, the surge drainage module is also used to be changed into high-impedance state by low resistance state further according to the current voltage.
In some optional implementations of second aspect, the stream discharging system further include: with the first chokes member
The exchange drainage module of part connection, the exchange drainage module, the pipeline for exporting first choke elements
AC influence electric current drains to the ground terminal of cathodic protection ground connection.
The beneficial effect of the embodiment of the present application includes:
Determine that there are failure electricity on pipeline according to the first voltage that the second choke elements export in fault current detection module
When stream, then fault current detection module can control the fault current that fault current drainage module exports the first choke elements
The ground terminal of cathodic protection ground connection is drained to, so that the second choke elements output first voltage is reduced to second voltage, to realize
Drainage is carried out to pipeline, realizes the protection to pipeline.In addition, pipeline voltage essence control module can be determined according to second voltage
It needs isolation voltage to be achieved to mismatch on current voltage and pipeline on pipeline, can control direct current drainage module and gripped first
The current flow of fluid element output drains to the ground terminal of cathodic protection ground connection, therefore pipeline voltage essence control module is accurate by again
Drainage solves existing electric drainager row when being disturbed on pipeline by the current voltage control on pipeline to matching with isolation voltage
After stream cathodic protection voltage can not stablize and the technical problem that causes cathodic protection ineffective.
To enable the above objects, features, and advantages of the application to be clearer and more comprehensible, preferred embodiment is cited below particularly, and cooperate
Appended attached drawing, is described in detail below.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 shows a kind of structural block diagram of stream discharging system of the application first embodiment offer；
Fig. 2 shows a kind of first pass figures of the drainage method of pipeline of the application second embodiment offer；
Fig. 3 shows a kind of second flow chart of the drainage method of pipeline of the application second embodiment offer.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Ground description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.Usually exist
The component of the embodiment of the present application described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed the application's to the detailed description of the embodiments herein provided in the accompanying drawings below
Range, but it is merely representative of the selected embodiment of the application.Based on embodiments herein, those skilled in the art not into
Row goes out every other embodiment obtained under the premise of creative work, shall fall in the protection scope of this application.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.Term " first ", " the
Two " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.Furthermore term in the application " and/
Or ", only a kind of incidence relation for describing affiliated partner, indicates may exist three kinds of relationships, for example, A and/or B, it can be with table
Show: individualism A exists simultaneously A and B, these three situations of individualism B.
First embodiment
Referring to Fig. 1, the application's provides a kind of stream discharging system 100, which includes: the first chokes member
Part 110, the second choke elements 120, surge drainage module 130, fault current detection module 140, fault current drainage module
150, pipeline voltage essence control module 160, direct current drainage module 170 and drainage module 180 is exchanged.
Optionally, one end of the first choke elements 110 is connect with pipeline, the other end of the first choke elements 110 then with wave
The input terminal connection of drainage module 130 is gushed, and the cathodic protection that the output end of surge drainage module 130 then connects cathodic protection connects
The ground terminal on ground.One end of second choke elements 120 respectively with the other end of the first choke elements 110 and surge drainage module 130
Input terminal connection, and the other end of the second choke elements 120 is then separately connected fault current detection module 140 and pipeline voltage
Essence control module 160.Fault current detection module 140 is connect with the control terminal of fault current drainage module 150 and pipeline voltage
Essence control module 160 is connect with the control terminal of direct current drainage module 170.In addition, the input terminal of fault current drainage module 150, straight
The input terminal of stream drainage module 170 is all connected with the other end of the first choke elements 110 with the input terminal for exchanging drainage module 180,
And the output end of the output end of fault current drainage module 150, direct current drainage module 170 and the output for exchanging drainage module 180
End is then all connected with the ground terminal of the cathodic protection ground connection of cathodic protection.
In the present embodiment, the first choke elements 110 can be conventional high frequency choke coil, and the second choke elements 120 can
Think conventional low-frequency choke coil.
Surge drainage module 130 is surge drainage circuit common on the market.In the present embodiment, it is greater than wave in current voltage
When gushing 130 preset starting voltage of drainage module, surge drainage module 130, for being changed into according to current voltage by high-impedance state
Current flow is drained to the ground terminal of cathodic protection ground connection by low resistance state, so that current voltage reduces.And it is lower than in current voltage
When the starting voltage, surge drainage module 130 is also used to be changed into high-impedance state by low resistance state further according to current voltage.
Fault current drainage module 150 is fault current drainage integrated circuit common on the market, fault current detection mould
Block 140 can be the IC chip for having detection to signal, processing and control ability, and fault current detection module
140 can be using the chip of current model conventional on the market.
Determine on pipeline exist according to the first voltage that the second choke elements 120 export in fault current detection module 140
When fault current, fault current detection module 140, for controlling fault current drainage module 150 for first choke elements
The fault current of 110 outputs drains to the ground terminal of cathodic protection ground connection, so that the second choke elements 120 export described first
Voltage is reduced to second voltage.
Optionally, fault current detection module 140 is also used to judge that the first voltage of the second choke elements 120 output is
It is no to be greater than preset normal voltage threshold value, wherein normal voltage threshold value is identical as second voltage.If so, fault current detection mould
Block 140 determines that there are fault currents on pipeline.
Direct current drainage module 170 is direct current drainage integrated circuit common on the market, and pipeline voltage essence control module 160 can also
Think have the IC chip of detection to signal, processing and control ability, and pipeline voltage essence control module 160 can adopt
With the chip of conventional model on the market at present.
Pipeline voltage essence control module 160, for determining the current voltage on pipeline and the pipeline according to second voltage
Isolation voltage to be achieved is needed to mismatch, the current flow that control direct current drainage module 170 exports the first choke elements 110 is arranged
It is flow to the ground terminal of cathodic protection ground connection, so that current voltage is matched with isolation voltage.
Optionally, pipeline voltage essence control module 160, be also used to judge the second voltage whether with preset reference voltage
Matching.If it is not, pipeline voltage essence control module 160, which determines, needs isolation voltage to be achieved not on current voltage and pipeline on pipeline
Current flow on pipeline that first choke elements 110 export is drained to cathodic protection by matching, control direct current drainage module 170
The ground terminal of ground connection.During current flow is drained to the ground terminal of cathodic protection ground connection by direct current drainage module 170, continue to sentence
Whether disconnected second voltage matches with preset reference voltage；If so, control direct current drainage module 170 stops drainage, so that currently
Voltage is matched with isolation voltage.
Exchanging drainage module 180 can be exchange drainage integrated circuit common on the market, and exchange drainage module 180 is used for
AC influence electric current on pipeline that first choke elements 110 export is drained to the ground terminal of cathodic protection ground connection.
Above content describes the system environments of stream discharging system 100, is held when will carry out drainage to stream discharging system 100 below
The drainage method of capable pipeline is described in detail.
Second embodiment
Referring to Fig. 2, the embodiment of the present application provides a kind of drainage method of pipeline, it is applied to stream discharging system.The pipeline
Drainage method include: step S100, step S200, step S300 and step S400.
Step S100: in current voltage starting voltage preset greater than the surge drainage module, the surge
Drainage module is changed into low resistance state by high-impedance state according to the current voltage, and the current flow is drained to cathodic protection ground connection
Ground terminal so that the current voltage reduce.
Pipeline may be subjected to lightning stroke due to being exposed to outdoor, pipeline, and make the voltage value of current voltage on pipeline compared with
It is high.Since the input terminal of surge drainage module is directly to pipeline, then surge drainage module can be somebody's turn to do at first
Current voltage.
In the present embodiment, surge drainage module pre-sets starting voltage, for example, starting voltage can be 90V.First
Under the inactive state of beginning, i.e., the voltage that surge drainage module obtains is not more than starting voltage, and surge drainage module can be place
In high-impedance state, then surge drainage module would not influence the normal work of other modules.
But if surge drainage module obtains current voltage and is greater than starting voltage, then surge drainage module can be from initial
The high-impedance state of inactive state is changed into the low resistance state under starting state.Wherein, the low resistance state of surge drainage module makes surge
Circuit where drainage module is already close to short circuit, so that gushing drainage module can work as current voltage in pipeline is corresponding
The big energy of preceding electric current drains to rapidly the ground terminal of cathodic protection ground connection with avalanche type speed, so that the current voltage on pipeline
Rapidly reduce.
It is understood that the delayed-action that the first choke elements have can form the other end institute to the first choke elements
The protection of all modules of connection.For example, when current voltage is very big, due to the time-lag action of the first choke elements, so that working as
For preceding voltage before all modules that the other end for being applied to the first choke elements by the first choke elements is connected, this is current
Voltage is by surge drainage module aerial drainage, thus the damage for all modules for avoiding the other end of the first choke elements from being connected
It is bad.
Step S200: when the current voltage is lower than the starting voltage, the surge drainage module is also used to root again
High-impedance state is changed by low resistance state according to the current voltage.
With the progress of surge drainage module drainage, current voltage is reduced rapidly on pipeline.It is reduced in current voltage low
When the starting voltage of surge drainage module, it is believed that can't be damaged lower than the current voltage of starting voltage subsequent other
Module, and the current voltage is also not enough to the effect of surge drainage module the surge drainage module is maintained to keep low-resistance
State.At this point, surge drainage module can be changed into the high-impedance state of initial inactive state from the low resistance state under starting state, with
It can continue to play respective effect convenient for subsequent other modules.
Step S300: it is determined in the fault current detection module according to the first voltage that second choke elements export
There are when fault current on the pipeline, the fault current detection module controls the fault current drainage module for described the
The fault current of one choke elements output drains to the ground terminal of cathodic protection ground connection, so that second choke elements export
The first voltage is reduced to second voltage.
Although the voltage of first choke elements output can be the current voltage after surge drainage module drainage, but deserve
Preceding voltage still can be biggish big voltage.Since fault current detection module is microelectronic element, if the current voltage
Fault current detection module is directly acted on, then may cause fault current detection module and be directly burned.Therefore, fault current
Detection module is not connect with the other end of the first choke elements directly, but is connect with the other end of the second choke elements.
Since the second choke elements also have the function of delay and chokes, therefore the second choke elements can be by the first chokes member
The current voltage of part output is depressurized to the first voltage that fault current detection module is able to bear, correspondingly, fault current detection
Module then can detecte the first voltage of the second choke elements output.
Normal voltage threshold value is pre-set in fault current detection module, for example, the normal voltage threshold value can be
2.5V.Fault current detection module may determine that whether the first voltage of the second choke elements output is greater than preset normal voltage
Threshold value.
If it is not, then illustrating not there is no fault current on pipeline, drainage is carried out without fault current drainage module.
If so, illustrating that the current voltage on pipeline is abnormal, and determine that there are fault currents on pipeline, need fault current
Drainage module carries out drainage.Turned in this way, fault current detection module can control fault current drainage module by off-state
Become closed state, so that fault current drainage module is under the control of fault current detection module, it will be by the first choke elements
Fault current on the pipeline of output drains to the ground terminal of cathodic protection ground connection, so that the second choke elements output first voltage drop
It is low.And detect that first voltage is reduced to second voltage identical with normal voltage threshold value in fault current drainage module, therefore
Barrier current detection module can then determine that the fault current on pipeline has been fully drained, and barrier current detection module can be controlled again
Fault current drainage module processed is changed into off-state by closed state, to terminate drainage.
It is understood that fault current is discharged by fault current drainage module, it can be to fault current drainage module shape
At protection, while cathodic protection voltage can not also be influenced.
Step S400: the pipeline voltage essence control module determines the current voltage on the pipeline according to the second voltage
It is mismatched with isolation voltage to be achieved is needed on the pipeline, controls the direct current drainage module first choke elements are defeated
The current flow out drains to the ground terminal of cathodic protection ground connection, so that the current voltage is matched with the isolation voltage.
Pipeline voltage essence control module is also microelectronic element, also for avoid the first choke elements export current voltage it is direct
It acts on pipeline voltage essence control module and pipeline voltage essence control module is caused directly to be burned.Therefore, pipeline voltage essence control module
Also it does not connect with the other end of the first choke elements directly, but is connect with the other end of the second choke elements.So, also base
In the delay of the second choke elements and the effect of chokes, pipeline voltage essence control module then also can detecte the output of the second choke elements
Second voltage.
In the present embodiment, when pipeline voltage essence control module obtains second voltage, illustrate still to exist on pipeline some dry
Electric current is disturbed, so that the current voltage on pipeline is unstable and is greater than isolation voltage.When to solve to be disturbed on pipeline, existing drainage
After device drainage cathodic protection voltage can not stablize and the technical problem that causes cathodic protection ineffective, it is necessary to pass through pipeline electricity
Interference electric current present on pipeline is continued to be discharged by pressure essence control module to the control of direct current drainage module.
Optionally, pipeline voltage essence control module pre-sets reference voltage, which is the voltage on pipeline
When for isolation voltage, the voltage of the second choke elements output.So, pipeline voltage essence control module is based on preset reference voltage,
It may determine that whether second voltage matches with preset reference voltage.
If matching, pipeline voltage essence control module are determined to need to be achieved be isolated on current voltage and pipeline on pipeline
Voltage matches, without carrying out drainage to pipeline.
If mismatching, pipeline voltage essence control module determine to need on current voltage and pipeline on pipeline it is to be achieved every
Ionization voltage mismatches, and determines that there is also some interference electric currents on pipeline.In this way, pipeline voltage essence control module can control directly
It flows drainage module and closed state is changed by off-state, so that control of the direct current drainage module in pipeline voltage essence control module
Under, the current flow on the pipeline exported by the first choke elements is drained to the ground terminal of cathodic protection ground connection, so that second grips
Fluid element exports second voltage and reduces.Current flow is drained to the process of the ground terminal of cathodic protection ground connection in direct current drainage module
In, pipeline voltage essence control module continues to judge whether second voltage is reduced to match with preset reference voltage.
Matched if it is determined that second voltage is not reduced to also with preset reference voltage, then pipeline voltage essence control module then after
Continuous control pipeline voltage essence control module drainage.
It is matched if it is determined that second voltage is reduced to preset reference voltage, then pipeline voltage essence control module then continues to control
Tubing giving sufficient strength voltage essence control module drainage, the current voltage of pipeline voltage essence control module, which arrived it, needs isolation voltage to be achieved,
Therefore pipeline no longer needs to drainage.Therefore pipeline voltage essence control module can control direct current drainage module again and be changed into disconnection by closed state
State so that direct current drainage module stops drainage, and matches the current voltage on pipeline with isolation voltage.
Referring to Fig. 3, further including step S500 in this application.
Step S500: AC influence electricity on the pipeline that the exchange drainage module exports first choke elements
Stream drains to the ground terminal of cathodic protection ground connection.
In the present embodiment, on pipeline there is likely to be some AC influences, for make the current voltage on pipeline with every
Ionization voltage matching, it is necessary to which AC influence is discharged.Optionally, by exchanging drainage module, exchange drainage module can be automatic
The ground terminal that AC influence electric current on the pipeline of the first choke elements output is drained to cathodic protection ground connection, realization will will exchange
Interference discharge.
It is understood that difference according to the actual situation, step S100, step S200, step S300, step in the present embodiment
Rapid S400 and step S500 can successively all or part of execution, but can also each step be individually performed.
In conclusion the embodiment of the present application provides the drainage method and stream discharging system of a kind of pipeline.The drainage side of pipeline
Method is applied to stream discharging system, and stream discharging system includes: the first choke elements connecting with pipeline, the connect with the first choke elements
Two choke elements, the fault current drainage module being connect with the first choke elements and direct current drainage module, and with the second chokes
The fault current detection module and pipeline voltage essence control module of element connection.Method include: fault current detection module according to
The first voltage of second choke elements output determines that fault current detection module controls failure electricity there are when fault current on pipeline
The fault current that first choke elements export is drained to the ground terminal of cathodic protection ground connection by stream drainage module, so that the second chokes are first
Part output first voltage is reduced to second voltage；Pipeline voltage essence control module determines the current voltage on pipeline according to second voltage
It is mismatched with isolation voltage to be achieved is needed on pipeline, the current flow that control direct current drainage module exports the first choke elements
The ground terminal for draining to cathodic protection ground connection, so that current voltage is matched with isolation voltage.
Determine that there are failure electricity on pipeline according to the first voltage that the second choke elements export in fault current detection module
When stream, then fault current detection module can control the fault current that fault current drainage module exports the first choke elements
The ground terminal of cathodic protection ground connection is drained to, so that the second choke elements output first voltage is reduced to second voltage, to realize
Drainage is carried out to pipeline, realizes the protection to pipeline.In addition, pipeline voltage essence control module can be determined according to second voltage
It needs isolation voltage to be achieved to mismatch on current voltage and pipeline on pipeline, can control direct current drainage module and gripped first
The current flow of fluid element output drains to the ground terminal of cathodic protection ground connection, therefore pipeline voltage essence control module is accurate by again
Drainage solves existing electric drainager row when being disturbed on pipeline by the current voltage control on pipeline to matching with isolation voltage
After stream cathodic protection voltage can not stablize and the technical problem that causes cathodic protection ineffective.
The above is only preferred embodiment of the present application, are not intended to limit this application, for those skilled in the art
For member, various changes and changes are possible in this application.Within the spirit and principles of this application, it is made it is any modification,
Equivalent replacement, improvement etc., should be included within the scope of protection of this application.It should also be noted that similar label and letter are under
Similar terms are indicated in the attached drawing in face, therefore, once being defined in a certain Xiang Yi attached drawing, are not then needed in subsequent attached drawing
It is further defined and explained.
More than, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, and it is any to be familiar with
Those skilled in the art within the technical scope of the present application, can easily think of the change or the replacement, and should all cover
Within the protection scope of the application.Therefore, the protection scope of the application should be subject to the protection scope in claims.
Claims (10)
1. a kind of drainage method of pipeline, which is characterized in that be applied to stream discharging system, the stream discharging system includes: to connect with pipeline
The first choke elements connect, the second choke elements connecting with first choke elements are connect with first choke elements
Fault current drainage module and direct current drainage module, and the fault current detection module being connect with second choke elements
With pipeline voltage essence control module；The described method includes:
It is determined in the fault current detection module according to the first voltage that second choke elements export and is deposited on the pipeline
In fault current, the fault current detection module controls the fault current drainage module, and first choke elements are defeated
The fault current out drains to the ground terminal of cathodic protection ground connection, so that second choke elements export the first voltage
It is reduced to second voltage；
The pipeline voltage essence control module determines on current voltage and the pipeline on the pipeline according to the second voltage
It needs isolation voltage to be achieved to mismatch, controls the current flow that the direct current drainage module exports first choke elements
The ground terminal for draining to cathodic protection ground connection, so that the current voltage is matched with the isolation voltage.
2. the drainage method of pipeline according to claim 1, which is characterized in that the pipeline voltage essence control module
Determined according to the second voltage needs isolation voltage to be achieved to mismatch on current voltage and the pipeline on the pipeline,
It controls the direct current drainage module and the current flow that first choke elements export is drained into cathodic protection ground connection
Ground terminal, comprising:
The pipeline voltage essence control module judges whether the second voltage matches with preset reference voltage；
If it is not, the pipeline voltage essence control module determine needed on current voltage on the pipeline and the pipeline it is to be achieved every
Ionization voltage mismatches；
The pipeline voltage essence control module controls the pipeline that the direct current drainage module exports first choke elements
On current flow drain to cathodic protection ground connection ground terminal；
During the current flow is drained to the ground terminal of cathodic protection ground connection by the direct current drainage module, the pipeline
Voltage essence control module continues to judge whether the second voltage matches with the preset reference voltage；
If so, the pipeline voltage essence control module, which controls the direct current drainage module, stops drainage so that the current voltage with
The isolation voltage matching.
3. the drainage method of pipeline according to claim 2, which is characterized in that the fault current detection module
It controls the fault current drainage module fault current that first choke elements export is drained into cathodic protection and connect
Before the ground terminal on ground, which comprises
It is preset normal that the fault current detection module judges whether the first voltage of the second choke elements output is greater than
Voltage threshold, wherein the normal voltage threshold value is identical as second voltage；
If so, the fault current detection module determines that there are fault currents on the pipeline.
4. the drainage method of pipeline according to claim 1, which is characterized in that the stream discharging system further include: be connected to
Surge drainage module between the pipeline and first choke elements；The method also includes:
In current voltage starting voltage preset greater than the surge drainage module, the surge drainage module is according to institute
It states current voltage and low resistance state is changed by high-impedance state, the current flow is drained to the ground terminal of cathodic protection ground connection, so that institute
State current voltage reduction；
When the current voltage is lower than the starting voltage, the surge drainage module is further according to the current voltage by low-resistance
State is changed into high-impedance state.
5. the drainage method of pipeline described in -4 any claims according to claim 1, which is characterized in that the stream discharging system also wraps
It includes: the exchange drainage module being connect with first choke elements, the method also includes:
AC influence electric current on the pipeline that first choke elements export is drained to cathode by the exchange drainage module
The ground terminal of protective grounding.
6. a kind of stream discharging system characterized by comprising the first choke elements being connect with pipeline, with the first chokes member
Second choke elements of part connection, the fault current drainage module being connect with first choke elements and direct current drainage module,
And the fault current detection module and pipeline voltage essence control module being connect with second choke elements；
It is determined in the fault current detection module according to the first voltage that second choke elements export and is deposited on the pipeline
In fault current, the fault current detection module, for controlling the fault current drainage module for first chokes
The fault current of element output drains to the ground terminal of cathodic protection ground connection, so that second choke elements output described the
One voltage is reduced to second voltage；
The pipeline voltage essence control module, for determining the current voltage on the pipeline and the pipe according to the second voltage
Need isolation voltage to be achieved to mismatch on road, control the direct current drainage module first choke elements are exported it is current
Electric current drains to the ground terminal of cathodic protection ground connection, so that the current voltage is matched with the isolation voltage.
7. stream discharging system according to claim 6, which is characterized in that
The pipeline voltage essence control module, is also used to judge whether the second voltage matches with preset reference voltage；If it is not,
The pipeline voltage essence control module, which determines, needs isolation voltage to be achieved not on current voltage and the pipeline on the pipeline
Matching；It controls the direct current drainage module and the current flow on the pipeline that first choke elements export is drained into yin
The ground terminal of pole protective grounding；The current flow is drained to the mistake of the ground terminal of cathodic protection ground connection in the direct current drainage module
Cheng Zhong continues to judge whether the second voltage matches with the preset reference voltage；If so, controlling the direct current drainage mould
Block stops drainage, so that the current voltage is matched with the isolation voltage.
8. stream discharging system according to claim 7, which is characterized in that
It is default to be also used to judge whether the first voltage of the second choke elements output is greater than for the fault current detection module
Normal voltage threshold value, wherein the normal voltage threshold value is identical as second voltage；If so, the fault current detection module
Determine that there are fault currents on the pipeline.
9. stream discharging system according to claim 6, which is characterized in that the stream discharging system further include: be connected to the pipe
Surge drainage module between road and first choke elements；
In current voltage starting voltage preset greater than the surge drainage module, the surge drainage module is used for
Low resistance state is changed by high-impedance state according to the current voltage, the current flow is drained to the ground terminal of cathodic protection ground connection,
So that the current voltage reduces；
When the current voltage is lower than the starting voltage, the surge drainage module is also used to further according to the current electricity
Pressure is changed into high-impedance state by low resistance state.
10. according to stream discharging system described in any claim of claim 6-9, which is characterized in that the stream discharging system further include: with
The exchange drainage module of the first choke elements connection,
The exchange drainage module, AC influence electric current drains on the pipeline for exporting first choke elements
The ground terminal of cathodic protection ground connection.
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| CN110581375A (en) * | 2019-10-18 | 2019-12-17 | 成都中航信虹科技股份有限公司 | Direct current interference current drainage device and system |
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| CN101343744A (en) * | 2008-08-28 | 2009-01-14 | 中国石油大学(北京) | Active interference removing apparatus for buried pipeline |
| CN201674222U (en) * | 2010-05-18 | 2010-12-15 | 上海海隆石油管材研究所 | Drainage device for protecting cathode of buried metal pipeline |
| CN202405774U (en) * | 2012-01-12 | 2012-08-29 | 中国海洋石油总公司 | Stray current drainage device |
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| CN105162100A (en) * | 2015-08-06 | 2015-12-16 | 北京市燃气集团有限责任公司 | Novel alternating-current electric drainage |
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| US20060070871A1 (en) * | 2004-10-04 | 2006-04-06 | Bushman James B | Cathodic protection system for underground storage tank |
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| CN101343744A (en) * | 2008-08-28 | 2009-01-14 | 中国石油大学(北京) | Active interference removing apparatus for buried pipeline |
| CN201674222U (en) * | 2010-05-18 | 2010-12-15 | 上海海隆石油管材研究所 | Drainage device for protecting cathode of buried metal pipeline |
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