CN109780450B - Intelligent drainage device and method for auxiliary alternating current stray current through pipeline infrasonic wave monitoring - Google Patents
Intelligent drainage device and method for auxiliary alternating current stray current through pipeline infrasonic wave monitoring Download PDFInfo
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Abstract
The invention relates to an intelligent drainage device and method for auxiliary alternating current stray current of pipeline infrasonic wave monitoring, which is characterized in that the device comprises: the pipeline infrasound monitoring system is used for monitoring infrasound monitoring data of the pipeline in real time; the record storage module is used for storing the infrasound historical monitoring data and analysis results of the pipeline; the alternating current measurement transmission module is used for acquiring the measured value of the pipeline stray current in real time; the central processing unit is used for obtaining analysis results and the time and degree of the interference of the stray current on the pipeline according to the real-time monitoring infrasound monitoring data, the infrasound history monitoring data and the measured value of the stray current of the pipeline; the drainage control module is used for controlling the on-site drainage device to drain according to the analysis result, and the invention can be widely applied to the field of safety detection of buried metal oil and gas pipelines.
Description
Technical Field
The invention relates to an intelligent drainage device and method for assisting alternating current stray current in monitoring infrasonic wave of a pipeline, and belongs to the field of safety detection of buried metal oil and gas pipelines.
Background
In recent years, with the rapid development of economy, the energy demand and the energy structure are increased, and the laying amount of the oil and gas long-distance pipeline in China is obviously increased. The construction of high-voltage power grids and electrified railways is under the same high-speed development, due to the limitation of geographic positions, the situation of parallel or cross crossing laying inevitably occurs in the design and construction process of the oil and gas pipelines and the electrified railways, the buried oil and gas pipelines are subjected to interference corrosion of stray current, and if the buried oil and gas pipelines are improperly treated, great harm is formed. Alternating current stray currents mainly cause interference to adjacent buried pipelines or metal bodies through capacitive, resistive and inductive coupling, so that alternating current stray currents flowing in and out of the pipelines are generated to cause corrosion. On the pipeline near the electrified railway, the interference voltage generated by induction is from a few volts, tens of volts to hundreds of volts, and the action time is intermittent and changes along with the load of the electrified railway feed network. One effective measure of protection against stray currents in the pipeline is drainage protection.
The sound wave can propagate in various media, and the high-frequency component of the sound wave has high attenuation speed in the propagation process due to the characteristics of short wavelength, high frequency and the like, and for long-distance transmission, the signal is not detected due to attenuation. Infrasonic waves have propagation characteristics of low frequency, long wavelength and slow energy attenuation, and can generally propagate over distances of thousands of meters. Therefore, the method for realizing the positioning of the leakage point of the gas pipeline by adopting the mode of extracting the time domain features and the frequency domain features of the sound wave signals has great development prospect, and the dangerous accidents can be prevented in advance by adopting the mode, so that the safety guarantee level of the pipeline is improved. The neural network theory and the predictive control algorithm are combined to form a type of neural network predictive control. Firstly, the neural network can fully approach any complex nonlinear function, can learn and adapt to the dynamic characteristics of an uncertain system, can rapidly perform real-time operation by adopting a parallel distribution processing algorithm, and the like, and establishes a neural network identification model as a prediction model. The intelligent predictive control overcomes the defects that the traditional predictive control algorithm is low in precision, only suitable for a linear system, lacking in self-learning and self-organizing functions and low in robustness. These algorithms can handle anomalies such as non-linearities, multi-objective, constraints, etc.
However, the conventional drainage device mainly has the following problems: 1) Detection and drainage are performed separately, no drainage effect feedback exists in the drainage process, and 'over drainage' or 'under drainage' can be formed; 2) The drainage current can be measured only by manually disconnecting and connecting the drainage device, and the live operation is inconvenient and unsafe; 3) Whether the drainer fails or not cannot be found in time; 4) For the interference of electrified railways, the change of the pipe ground potential of the pipeline has a time characteristic, and is difficult to accurately, timely and intelligently maintain the pipeline protection potential at a relatively stable value corresponding to the running time of a train.
Disclosure of Invention
Aiming at the problems, the invention aims to provide an intelligent drainage device and method for auxiliary alternating current stray current of pipeline infrasonic wave monitoring, which have drainage effect feedback, are convenient and safe.
In order to achieve the above purpose, the present invention adopts the following technical scheme: intelligent drainage device of supplementary alternating current stray current of pipeline infrasonic wave monitoring, its characterized in that, this intelligent drainage device includes: the pipeline infrasound monitoring system is used for monitoring infrasound monitoring data of the pipeline in real time; the record storage module is used for storing the infrasound historical monitoring data of the pipeline; the alternating current measurement transmission module is used for acquiring the measured value of the pipeline stray current in real time; the central processing unit is used for obtaining analysis results and the time and degree of the interference of the stray current on the pipeline according to the real-time monitoring infrasound monitoring data, the infrasound history monitoring data and the measured value of the stray current of the pipeline; and the drainage control module is used for controlling the on-site drainage device to drain according to the analysis result, so as to realize intelligent drainage operation of the pipeline.
Further, the intelligent drainage device further comprises an alarm module, wherein the alarm module is used for alarming according to the alarm signal sent by the alternating current measurement transmission module and sending an early warning signal to the central processing unit.
Further, the ac measurement transmission module includes: the GPS and/or Beidou double positioning unit is used for acquiring the position of the pipeline interfered by the stray current; the stray current measuring unit is used for acquiring the measured value of the stray current of the pipeline in real time according to the position of the pipeline interfered by the stray current; and the potential judging unit is used for judging whether the potential of the pipeline is normal or not according to the measured value of the pipeline stray current and a preset adjusting threshold value, and sending an alarm signal to the alarm module if the potential of the pipeline is abnormal.
Further, the central processing unit is internally provided with: the parameter setting unit is used for presetting an adjustment threshold value and a drainage threshold value of the pipeline stray current according to the real-time monitoring infrasound monitoring data and the infrasound history monitoring data and sending the adjustment threshold value to the alternating current measurement transmission module; the stray current interference degree judging unit is used for judging the time and degree of the pipeline subjected to the stray current interference according to the infrasound monitoring data and the historical monitoring data; and the analysis processing unit is used for obtaining an analysis result according to a preset drainage threshold value and a measurement value of the pipeline stray current and sending the analysis result to the drainage control module.
Further, the central processing unit obtains an analysis result by adopting a neural network data coupling analysis method.
The intelligent drainage method for auxiliary alternating current stray current through pipeline infrasonic wave monitoring is characterized by comprising the following steps of: 1) The pipeline infrasound monitoring system monitors infrasound monitoring data of the pipeline in real time and sends the infrasound monitoring data to the central processing unit; 2) The central processing unit judges the time and degree of the pipeline under the interference of the stray current according to the real-time monitoring infrasound monitoring data and the pipeline infrasound history monitoring data recorded in the storage module; 3) The alternating current measurement transmission module measures the stray current of the pipeline in real time and sends the measured value of the stray current of the pipeline to the central processing unit; 4) The central processing unit presets a drainage threshold value of the pipeline stray current according to the infrasound monitoring data and the infrasound history monitoring data monitored in real time; 5) The central processing unit obtains an analysis result according to the drainage threshold value and the measured value of the pipeline stray current and sends the analysis result to the drainage control module; 6) When the analysis result shows that the measured value of the pipeline stray current reaches the preset drainage threshold value, the drainage control module controls the on-site drainage device to start to drain, and intelligent drainage operation of the pipeline is achieved.
Further, when the measured value of the pipeline stray current exceeds the regulation threshold value preset by the central processing unit, the alternating current measurement transmission module sends an alarm signal to the alarm module, and the alarm module alarms and sends an early warning signal to the central processing unit.
Due to the adoption of the technical scheme, the invention has the following advantages: 1. the invention adopts a neural network data coupling analysis method to predict the drainage threshold value of the pipeline stray current and obtains an analysis result according to the drainage threshold value and the measurement value of the pipeline stray current, so that the drainage control module can control the on-site drainage device to conduct intelligent drainage operation according to the analysis result. 2. Compared with the traditional stray current drainage device, the alternating current measurement transmission module comprises a GPS and/or Beidou double positioning unit and a stray current measurement unit, and can accurately measure the stray current. 3. The invention is provided with the alarm module, alarms through the alarm module under the condition that the normal potential is still not recovered after the current is drained through the on-site drainage device, and timely sends an alarm signal to the central processing unit to request other means to eliminate interference, so that the invention can be widely applied to the field of safety detection of buried metal oil and gas pipelines.
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FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic diagram of signal transmission according to the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings. It is to be understood, however, that the drawings are designed solely for the purposes of providing a better understanding of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 and fig. 2, the intelligent drainage device for assisting in monitoring alternating current stray current by using pipeline infrasonic waves provided by the invention comprises a pipeline infrasonic wave monitoring system 1, a recording and storing module 2, an alternating current measurement and transmission module 3, a central processing unit 4 and a drainage control module 5, wherein the pipeline infrasonic wave monitoring system 1 is a monitoring system disclosed in the prior art, and specific structures are not repeated herein.
The pipeline infrasound monitoring system 1 is used for monitoring infrasound monitoring data of a pipeline in real time and sending the infrasound monitoring data to the central processing unit 4. The record storage module 2 is used for storing the infrasound wave history monitoring data of the pipeline. The alternating current measurement transmission module 3 is used for acquiring the measured value of the pipeline stray current in real time and sending the measured value to the central processing unit 4. The central processing unit 4 is used for judging the time and the degree of the pipeline under the interference of the stray current according to the infrasonic wave monitoring data and the infrasonic wave history monitoring data which are monitored in real time (when the alternating current density (A/m) 2 ) When the alternating current interference degree is less than 30, the alternating current interference degree is weak; when the alternating current density (A/m 2 ) When the frequency is 30-100, the alternating current interference degree is medium; when the alternating current density (A/m 2 ) At > 100, the ac interference level is strong); the central processing unit 4 is further configured to analyze the measured value of the pipe stray current, the real-time monitored infrasonic wave monitoring data, and the infrasonic wave history monitoring data to obtain an analysis result (the analysis result refers to whether the measured value of the pipe stray current reaches a preset drainage threshold value), and send the analysis result to the record storage module 2 and the drainage control module 5, where the record storage module 2 stores the analysis result. The drainage control module 5 is used for accurately controlling the on-site drainage device 6 to drain according to the analysis result, so as to realize intelligent drainage operation of the pipeline.
In a preferred embodiment, the intelligent drainage device further comprises an alarm module 7, wherein the alarm module 7 is used for alarming according to the alarm signal sent by the alternating current measurement transmission module 3 and sending an early warning signal to the central processing unit 4, so that the central processing unit 4 can take other effective means to eliminate interference according to the early warning signal.
In a preferred embodiment, the ac measurement transmission module 3 includes a GPS (global positioning system) and/or a beidou dual positioning unit, a stray current measurement unit, and a potential judgment unit, where the GPS and the beidou dual positioning unit are used to obtain the position of the pipeline interfered by the stray current, so as to accurately measure the stray current. The stray current measuring unit is used for acquiring the measured value of the stray current of the pipeline in real time according to the position of the pipeline, which is interfered by the stray current. The electric potential judging unit is used for judging whether the electric potential of the pipeline is normal (namely, whether the measured value of the pipeline stray current exceeds the preset regulating threshold value) according to the measured value of the pipeline stray current and the regulating threshold value preset by the central processing unit 4, and if the electric potential is abnormal, an alarm signal is sent to the alarm module 7.
In a preferred embodiment, a parameter setting unit, a stray current interference degree judging unit and an analysis processing unit are provided in the central processing unit 4. The parameter setting unit is used for presetting an adjustment threshold value and a drainage threshold value of the pipeline stray current according to the infrasonic wave monitoring data and the infrasonic wave history monitoring data which are monitored in real time, sending the adjustment threshold value to the alternating current measurement transmission module 3 and sending the drainage threshold value to the analysis processing unit. The stray current interference degree judging unit is used for judging the time and degree of the pipeline subjected to stray current interference according to the infrasound monitoring data and the infrasound history monitoring data monitored in real time. The analysis processing unit is used for obtaining an analysis result according to a preset drainage threshold value and a measurement value of the pipeline stray current by adopting a neural network data coupling analysis method, and sending the analysis result to the drainage control module 5.
The following describes in detail the method for using the intelligent drainage device for assisting alternating current stray current in monitoring the infrasonic wave of the pipeline according to the invention through a specific embodiment:
1) The pipe infrasound monitoring system 1 monitors the infrasound monitoring data of the pipe in real time and transmits the data to the central processing unit 4.
2) The central processing unit 4 judges the time and degree of the pipeline under the interference of the stray current according to the real-time monitoring infrasound monitoring data and the pipeline infrasound history monitoring data in the record storage module 2.
3) The ac measurement transmission module 3 measures the pipe stray current in real time and sends the measured value of the pipe stray current to the central processor 4.
4) The central processing unit 4 presets a drainage threshold value and an adjustment threshold value of the pipeline stray current according to the infrasound wave monitoring data and the infrasound wave history monitoring data monitored in real time.
5) The central processing unit 4 obtains analysis results according to the drainage threshold value and the measured value of the pipeline stray current, and sends the analysis results to the record storage module 2 and the drainage control module 5.
6) When the analysis result is that the measured value of the pipeline stray current reaches the preset drainage threshold value, the drainage control module 5 precisely controls the on-site drainage device 6 to start drainage, and intelligent drainage operation of the pipeline is achieved.
7) When the measured value of the stray current of the pipeline exceeds a preset regulation threshold value, the alternating current measurement transmission module 3 sends an alarm signal to the alarm module 7 when the pipeline fails to recover to the cathodic protection potential before interference, the alarm module 7 alarms and sends an early warning signal to the central processing unit 4, so that the central processing unit 4 can take other effective means to eliminate interference according to the early warning signal.
The foregoing embodiments are only for illustrating the present invention, wherein the structures, connection modes, manufacturing processes, etc. of the components may be changed, and all equivalent changes and modifications performed on the basis of the technical solutions of the present invention should not be excluded from the protection scope of the present invention.
Claims (4)
1. Intelligent drainage device of supplementary alternating current stray current of pipeline infrasonic wave monitoring, its characterized in that, this intelligent drainage device includes:
the pipeline infrasound monitoring system is used for monitoring infrasound monitoring data of the pipeline in real time;
the record storage module is used for storing the infrasound historical monitoring data of the pipeline;
the alternating current measurement transmission module is used for acquiring the measured value of the pipeline stray current in real time;
the central processing unit is used for obtaining analysis results and the time and degree of the interference of the stray current on the pipeline according to the real-time monitoring infrasound monitoring data, the infrasound history monitoring data and the measured value of the stray current of the pipeline;
the drainage control module is used for controlling the on-site drainage device to drain according to the analysis result, so as to realize intelligent drainage operation of the pipeline;
the alternating current measurement transmission module comprises:
the GPS and/or Beidou double positioning unit is used for acquiring the position of the pipeline interfered by the stray current;
the stray current measuring unit is used for acquiring the measured value of the stray current of the pipeline in real time according to the position of the pipeline interfered by the stray current;
the potential judging unit is used for judging whether the potential of the pipeline is normal or not according to the measured value of the pipeline stray current and a preset adjusting threshold value, and sending an alarm signal to the alarm module if the potential of the pipeline is abnormal;
the CPU is internally provided with:
the parameter setting unit is used for presetting an adjustment threshold value and a drainage threshold value of the pipeline stray current according to the real-time monitoring infrasound monitoring data and the infrasound history monitoring data and sending the adjustment threshold value to the alternating current measurement transmission module;
the stray current interference degree judging unit is used for judging the time and degree of the pipeline subjected to the stray current interference according to the infrasound monitoring data and the historical monitoring data;
the analysis processing unit is used for obtaining an analysis result according to a preset drainage threshold value and a measurement value of the pipeline stray current and sending the analysis result to the drainage control module;
and the alarm module is used for alarming according to the alarm signal sent by the alternating current measurement transmission module and sending an early warning signal to the central processing unit.
2. The intelligent drainage device for auxiliary alternating current stray current monitoring by using pipeline infrasonic waves as claimed in claim 1, wherein the central processing unit obtains an analysis result by adopting a neural network data coupling analysis method.
3. The intelligent drainage method for monitoring auxiliary alternating current stray current by using the pipeline infrasonic wave based on the intelligent drainage device for monitoring auxiliary alternating current stray current by using the pipeline infrasonic wave according to claim 1 is characterized by comprising the following steps:
1) The pipeline infrasound monitoring system monitors infrasound monitoring data of the pipeline in real time and sends the infrasound monitoring data to the central processing unit;
2) The central processing unit judges the time and degree of the pipeline under the interference of the stray current according to the real-time monitoring infrasound monitoring data and the pipeline infrasound history monitoring data recorded in the storage module;
3) The alternating current measurement transmission module measures the stray current of the pipeline in real time and sends the measured value of the stray current of the pipeline to the central processing unit;
4) The central processing unit presets a drainage threshold value of the pipeline stray current according to the infrasound monitoring data and the infrasound history monitoring data monitored in real time;
5) The central processing unit obtains an analysis result according to the drainage threshold value and the measured value of the pipeline stray current and sends the analysis result to the drainage control module;
6) When the analysis result shows that the measured value of the pipeline stray current reaches the preset drainage threshold value, the drainage control module controls the on-site drainage device to start to drain, and intelligent drainage operation of the pipeline is achieved.
4. The intelligent drainage method for auxiliary alternating current stray current in pipeline infrasonic wave monitoring according to claim 3, wherein when the measured value of the stray current in the pipeline exceeds the preset regulation threshold value of the central processing unit, the alternating current measurement transmission module sends an alarm signal to the alarm module, and the alarm module gives an alarm and sends an early warning signal to the central processing unit.
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| CN110079812A (en) * | 2019-05-28 | 2019-08-02 | 中海石油气电集团有限责任公司 | A kind of intelligent cathode monitoring for protection device of multi-source data coupling auxiliary |
| CN111678051B (en) * | 2020-05-22 | 2021-07-20 | 中国石油大学(北京) | Pipeline interference protection method, device, equipment and storage medium |
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