CN112760653B

CN112760653B - Current control method and device in cathodic protection system

Info

Publication number: CN112760653B
Application number: CN201911058937.3A
Authority: CN
Inventors: 闫刘斌; 李贵生; 许向峰; 苗苗; 李德强; 王冬梅; 李刚
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2023-01-10
Anticipated expiration: 2039-11-01
Also published as: CN112760653A

Abstract

The application discloses a current control method and device in a cathodic protection system, and belongs to the field of oil-gas ground engineering. In the embodiment of the application, if a problem loop exists in a plurality of loops according to a plurality of detected current values, the current in the problem loop can be adjusted. Since the adjustment of the current in the problematic loop may cause the current in other loops of the plurality of loops to change, after the adjustment of the current in the problematic loop, the currents in the plurality of loops may be continuously detected to determine whether the problematic loop still exists until the problematic loop does not exist in the plurality of loops. Therefore, the current adjusting method can control the currents in the multiple loops to be in a dynamic balance state, so that the currents in the multiple loops in the cathode protection system are controllable, and the currents in the multiple loops can meet the protection requirement of an oil-gas pipeline.

Description

Current control method and device in cathodic protection system

Technical Field

The application relates to the field of oil-gas ground engineering, in particular to a current control method and device in a cathodic protection system.

Background

Currently, impressed current cathodic protection techniques may be employed to reduce corrosion of oil and gas pipelines. The impressed current cathodic protection technology is characterized in that a large amount of electrons are supplemented to the oil-gas pipeline through an impressed direct current power supply and an auxiliary anode device, so that the oil-gas pipeline is in a state of surplus electrons, and the corrosion rate of the oil-gas pipeline is slowed down. Wherein, the external direct current power supply, the auxiliary anode device, the oil gas pipeline and the cable for connection form a cathode protection system together.

Currently, in the cathodic protection system, the external direct current power supply is usually a potentiostat, and the auxiliary anode device and the oil and gas pipeline are both composed of a plurality of devices. The positive pole of the potentiostat can be connected with a plurality of auxiliary anode devices through cables, and the negative pole of the potentiostat can be connected with a plurality of oil and gas pipelines through cables. Wherein, an auxiliary anode device in a plurality of auxiliary anode devices and an oil gas pipeline in a plurality of oil gas pipelines form a loop, and a plurality of loops are connected in parallel.

However, when the oil and gas pipelines are protected by the cathodic protection system, the grounding resistances corresponding to the auxiliary anode devices at different places are not equal, and the grounding resistances of the oil and gas pipelines at different places are not equal, so that the resistances in the loops are not equal, and the current value of each loop is not equal. Wherein, some loop currents may be too large, thereby causing the oil and gas pipeline in this loop to be in an over-protection state, and some loop currents may be too small, thereby causing the oil and gas pipeline protection in this loop to be lacked. Accordingly, it is desirable to provide a current control method and device to ensure controllable currents of multiple loops in a cathodic protection system, so that the currents in the multiple loops can meet the protection requirements of oil and gas pipelines.

Disclosure of Invention

The embodiment of the application provides a current control method, a current control device, intelligent equipment and a storage medium, which can control the current of a plurality of loops in a cathode protection system. The technical scheme is as follows:

in a first aspect, a method for controlling current in a cathodic protection system is provided, the method comprising:

detecting a current value of each of a plurality of loops in a cathodic protection system;

judging whether a problem loop exists in the loops according to the detected current values, wherein the problem loop is a loop of which the current value is not in a protection current value range;

if the plurality of loops have problem loops, adjusting the current in the problem loops according to the current value of the problem loops and the protection current value range, and returning to the step of detecting the current value of each loop in the plurality of loops in the cathode protection system until no problem loops exist in the plurality of loops.

Optionally, the adjusting the current in the problem loop according to the current value in the problem loop and the protection current value range includes:

if the current value of the problem loop is larger than the upper limit value of the protection current value range, increasing the resistance in the problem loop to reduce the current in the problem loop;

and if the current value of the problem loop is smaller than the lower limit value of the protection current value range, reducing the resistance in the problem loop to increase the current in the problem loop.

Optionally, the increasing the resistance in the problem loop comprises:

increasing the resistance in the problem loop by a first value, wherein the change of the current in the problem loop caused by the first value is smaller than the difference value between the upper limit value and the lower limit value of the protection current value range;

the reducing the resistance in the first loop comprises:

reducing the resistance within the problem loop by the first value.

Optionally, the method further comprises:

and if a problem loop exists in the plurality of loops and the resistance in the problem loop is adjusted to the maximum value or the minimum value of the measuring range, cutting off the problem loop and sending an alarm instruction.

Optionally, after detecting the current value of each of the multiple loops in the cathodic protection system, the method further includes:

displaying the plurality of current values.

In a second aspect, a current control device in a cathodic protection system is provided, wherein the current control device is connected with a potentiostat through an anode cable and is connected with a plurality of anodes, and the current control device comprises a plurality of current detection modules, a control module and a plurality of current regulation modules;

the plurality of current detection modules and the plurality of current regulation modules are connected with the control module, wherein each of a plurality of loops in the cathodic protection system is connected with one current detection module and one current regulation module in series;

each current detection module in the plurality of current detection modules is used for detecting a current value in a loop where the corresponding current detection module is located and sending the detected current value to the control module;

the control module is used for judging whether a problem loop exists in the loops according to the received current values, if the problem loop exists in the loops, generating an adjusting instruction according to the current value of the problem loop and the protection current value range, sending the adjusting instruction to the current adjusting module in the problem loop, returning to the step of judging whether the problem loop exists in the loops according to the received current values until the problem loop does not exist in the loops, wherein the problem loop refers to the loop of which the current value is not in the protection current value range;

and the current regulating module positioned in the problem loop in the plurality of current regulating modules is used for receiving the regulating instruction sent by the control module and regulating the current in the problem loop according to the regulating instruction.

Optionally, the current control device further comprises a display module, and the display module is connected with the control module;

the control module is further used for sending the current values to the display module;

and the display module is used for receiving the plurality of current values sent by the control module and displaying the plurality of current values.

Optionally, the plurality of current adjustment modules are a plurality of adjustable resistors;

the current adjusting module in the problem loop among the plurality of current adjusting modules is specifically configured to increase or decrease a resistance according to a first value carried in the received adjusting instruction to adjust the current in the problem loop, where a change of the current in the problem loop caused by the first value is smaller than a difference between an upper limit value and a lower limit value of the protection current value range.

Optionally, the current control device further comprises a safety module and an alarm module, and both the safety module and the alarm module are connected with the control module;

the control module is also used for generating a cutting-off instruction and sending the cutting-off instruction to the safety module if a problem loop exists in the loops and the resistance value of the current regulating module in the problem loop reaches the maximum value or the minimum value of the measuring range;

the safety module is used for receiving the cutting-off instruction, cutting off the problem loop based on the cutting-off instruction, and returning a feedback signal for indicating that the problem loop is cut off to the control module;

the control module is also used for sending an alarm instruction to the alarm module when receiving the feedback signal;

and the alarm module is used for receiving the alarm instruction sent by the control module and sending the alarm instruction out.

Optionally, the safety module is a relay, and the current detection module is a current sensor.

In a third aspect, there is provided a current control apparatus, characterized by comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to perform the steps of any of the methods of the first aspect described above.

In a fourth aspect, a computer-readable storage medium is provided, having instructions stored thereon, which when executed by a processor, implement the steps of any of the methods of the first aspect described above.

In a fifth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the steps of any of the methods of the first aspect described above.

The beneficial effect that technical scheme that this application provided brought includes at least:

in the embodiment of the application, if a problem loop exists in a plurality of loops according to a plurality of detected current values, the current in the problem loop can be adjusted. Since the adjustment of the current in the problematic loop may cause the current in other loops in the plurality of loops to change, after the current in the problematic loop is adjusted, it is possible to determine whether there is a problematic loop by continuously detecting the currents in the plurality of loops until there is no problematic loop in the last plurality of loops, that is, until the plurality of loops are adjusted to be within the range of the protection current value, the adjustment is stopped. Therefore, the current adjusting method can control the currents in the multiple loops to be in a dynamic balance state, so that the currents in the multiple loops in the cathode protection system are controllable, and the currents in the multiple loops can meet the protection requirement of an oil-gas pipeline.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a current control device in a cathodic protection system according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a cathodic protection system provided in an embodiment of the present application;

fig. 3 is a flowchart of a current control method in a cathodic protection system according to an embodiment of the present application;

fig. 4 is a block diagram of a control device according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a current control device in a cathodic protection system according to an embodiment of the present application. As shown in fig. 1, the apparatus includes a plurality of current detection modules 101, a control module 102, and a plurality of current regulation modules 103; the plurality of current detection modules 101 and the plurality of current regulation modules 103 are connected to the control module 102, wherein each of the plurality of loops in the cathodic protection system is connected in series with one current detection module 101 and one current regulation module 103.

Each current detection module 101 may be configured to detect a current value in a loop where the current detection module is located in real time, and send the current value to the control module 102; the control module 102 is configured to determine whether a problem loop exists in the multiple loops according to the received multiple current values sent by the multiple current detection modules, generate an adjustment instruction according to the current value of the problem loop and the range of the protection current value if a problem loop exists in the multiple loops, send the adjustment instruction to a current adjustment module connected in series in the problem loop, return to the step of determining whether a problem loop exists in the multiple loops according to the received multiple current values until a problem loop does not exist in the multiple loops, where the problem loop is a loop in which the current value in the multiple loops is not within the range of the protection current value; the current adjusting module in the problem loop among the plurality of current adjusting modules may be configured to receive an adjusting instruction sent by the control module 102, and adjust the current in the problem loop according to the adjusting instruction.

It should be noted that the current detection module 101 may be a current sensor. The current sensor in each loop may obtain the current value in the corresponding loop in real time and send the current value to the control module 102. The current value detected by the current sensor can be in the range of 0-20A, and the accuracy can be +/-0.1A. It should be further noted that, the plurality of current sensors may be all hall semiconductor chips, so that the plurality of current sensors may obtain current values in the plurality of loops in real time by using the hall sensing principle. For example, the general process of the current sensor obtaining the current value by the hall sensing principle may be: in the process that current flows from one end of the Hall semiconductor wafer to the other end of the Hall semiconductor wafer, the current is deviated to one side under the action of Lorentz force, so that the Hall semiconductor wafer generates Hall voltage, the Hall voltage is amplified by an amplifier of an integrated circuit in the current sensor, and then a signal is output, the output signal is converted into a current signal, and the current signal is the current value in a loop.

The control module 102 is connected to the plurality of current detection modules 101. The control module 102 may be a single chip microcomputer or other devices with signal processing functions. The control module 102 may be configured to receive a plurality of current values sent by the plurality of current detection modules 101. Specifically, the control module 102 may receive a plurality of current values sent by the plurality of current detection modules 101 or send an adjustment instruction to the plurality of current adjustment modules through a plurality of parallel I \ O interfaces by executing a program stored therein. Before sending the adjustment instruction to the plurality of current adjustment modules, the control module 102 may receive a plurality of current values through a plurality of parallel I \ O interfaces, and then the control module 102 may determine whether a problem loop exists in the plurality of loops according to the plurality of current values, determine the adjustment module 103 located in the problem loop from the plurality of current adjustment modules 103, generate the adjustment instruction according to the current value in the problem loop, and send the adjustment instruction to the current adjustment module 103 in the problem loop. It should be noted that the control module 102 may also be configured to send an adjustment stopping instruction to the adjustment module in the loop when detecting that the adjusted current in the problem loop is within the protection current value range.

The control module 102 is connected to a plurality of current regulation modules 103. The plurality of current adjustment modules 103 may be a plurality of adjustable resistors. The adjustment range of each adjustable resistor in the plurality of adjustable resistors may be 0-100 ohms, the adjustment precision may be ± 0.1 ohms, and the specific adjustment range and the adjustment precision are determined according to practical application situations, which is not limited in this embodiment of the application. It should be noted that, each adjustable resistor may have an operating parameter, for example, an adjustment period, where the adjustment period may be set to be once every 60 seconds, or once every 80 seconds, or may be set to be any one of 60 seconds to 80 seconds, and the specific adjustment period may be determined according to the magnitude of the resistance value in each loop, which is not limited in this embodiment of the present application. Thus, after receiving the adjustment instruction sent by the control module 102, the adjustable resistor may perform resistance adjustment according to a set adjustment period until the current in the loop is adjusted to the protection current value range, and the adjustable resistor may receive the adjustment stopping instruction sent by the control module 102, thereby stopping adjusting the resistance in the loop.

Optionally, the apparatus may further include a display module 104, and the display module 104 is connected to the control module 102. In such implementations, the control module 102 may also be configured to send a plurality of current values to the display module 104. The display module 104 may be configured to receive the plurality of current values sent by the control module 102 and display the plurality of current values. It should be noted that after the control module 102 receives the plurality of current values sent by the plurality of current detection modules 101, it may execute a program stored therein, and further send the plurality of current values to the display module 104 through a plurality of parallel I \ O interfaces. When the display module 104 receives the plurality of current values sent by the control module 102, the plurality of current values are displayed. Wherein, the display module can be a liquid crystal display screen. It should be further noted that the display module 104 may also display parameters of the control module and data such as fault information and alarm information fed back by the subsequent alarm module. The size of the type of the data to be displayed is determined according to the data information sent by the control module 102, which is not limited in this embodiment of the application.

Optionally, the apparatus may further include a security module 105 and an alarm module 106, and both the security module 105 and the alarm module 106 may be connected to the control module 102. In this implementation, the control module 102 may be further configured to generate a cut-off instruction and send the cut-off instruction to the safety module 105 when it is detected that the current adjusted in the problem loop is not within the protection current value range and the resistance value of the current adjusting module in the problem loop has reached the maximum value or the minimum value of the measurement range. It should be noted that, because the adjustment range of the current adjustment module in the problem loop is limited, the current in the problem loop may not be adjusted to the protection current value range within the adjustment range of the current adjustment module in the problem loop, at this time, the control module 102 may generate and send a cut-off instruction in time to instruct the safety module 105 to cut off the problem loop, thereby avoiding a line fault occurring in the problem loop, and further avoiding potential safety hazard brought to the entire apparatus. Alternatively, in another possible implementation, a shutdown command may also be automatically generated by a current regulation module in the problem loop and sent to the safety module 105.

And the safety module 105 is used for receiving a cutting instruction, cutting off the problem loop based on the cutting instruction and returning a feedback signal for indicating that the problem loop is cut off to the control module 102. For example, the safety module 105 may be a relay, and the contact of the relay may be a break type, when the relay receives a cut-off command, the contact of the relay automatically opens to break the circuit of the problem circuit, and a broken feedback signal may be formed after the problem circuit is broken, and then the feedback signal may be sent to the control module 102 through the relay. Accordingly, the control module 102 is further configured to receive a feedback signal sent by the security module 105 and send an alarm command to the alarm module 106.

And the alarm module 106 is configured to receive the alarm instruction sent by the control module 102, and send the alarm instruction. It should be noted that the alarm module 106 may send the alarm instruction to the monitoring terminal of the cathode protection system, and the monitoring terminal may take corresponding measures according to the received alarm instruction, so that the whole system is safe and controllable.

In the embodiment of the application, if a problem loop exists in a plurality of loops according to a plurality of detected current values, the current in the problem loop can be adjusted. Since the adjustment of the current in the problematic loop may cause the change of the currents in other loops of the plurality of loops, after the current in the problematic loop is adjusted, it is possible to determine whether there is a problematic loop by continuously detecting the currents in the plurality of loops until there is no problematic loop in the last plurality of loops, that is, until the plurality of loops are adjusted to be within the range of the protection current value, the adjustment is stopped. Therefore, the current adjusting method can control the currents in the multiple loops to be in a dynamic balance state, so that the currents in the multiple loops in the cathode protection system are controllable, and the currents in the multiple loops can meet the protection requirement of an oil-gas pipeline.

In addition, in the embodiment of the application, the system can further include a safety module and an alarm module, so that the safety module can receive a cut-off instruction, cut off the first loop based on the cut-off instruction, and return a feedback signal for indicating that the first loop is cut off to the control module, after receiving the cut-off instruction, the control module can send the alarm instruction to the alarm module, and after receiving the alarm instruction, the alarm module can send the alarm instruction to a monitoring terminal of the cathode protection system, so that monitoring personnel can quickly make corresponding measures according to the alarm instruction received by the monitoring terminal, and the whole system is safe and controllable.

Fig. 2 is a schematic diagram of a cathodic protection system provided in an embodiment of the present application, and as shown in fig. 2, the cathodic protection system includes a plurality of pipes 201, a potentiostat 202, a plurality of anodes 203, and a current control device 204.

Wherein, a plurality of pipelines 201 are connected with a potentiostat 202 through a cathode cable, a current control device 204 is connected with the potentiostat 202 through an anode cable, and the current control device 204 is also connected with a plurality of anodes 203.

It should be noted that the plurality of pipes 201 are a plurality of cathodes in the cathodic protection system, that is, pipes to be protected by the cathodic protection system. The current control device 204 is the current control device shown in fig. 1. The potentiostat 202 is connected to a plurality of current detection modules included in the current control apparatus 204 via anode cables, each current detection module in the current control apparatus 204 is connected in series with one current regulation module, and each current regulation module is connected in series with one anode in the plurality of anodes. Thus, a current detection module and a current regulation module are connected in series in a loop formed by each anode and the corresponding pipeline (namely, the cathode). On this basis, the current control device 204 can obtain the current in the corresponding loop through the current detection module by the method described in the foregoing embodiment, and then adjust the current in the corresponding loop through the current adjustment module, thereby realizing the control of the current in each loop in the cathodic protection system, ensuring that the currents of multiple circuits in the cathodic protection system are all controllable, and enabling the currents in the multiple loops to meet the protection requirement of the oil-gas pipeline.

Fig. 3 is a flowchart of a current control method according to an embodiment of the present disclosure. The method can be applied to the current control device, as shown in fig. 3, and comprises the following steps:

step 301: a current value is detected for each of a plurality of loops in a cathodic protection system.

The cathodic protection system is a system which enables an oil and gas pipeline to be in an impressed current cathodic protection state by connecting various electric elements, and comprises a potentiostat, an auxiliary anode device, the oil and gas pipeline, a cable for connection and the current control device. In this embodiment, the current control device may control the plurality of current detection modules 101 to obtain the current value in each of the plurality of loops in the cathode protection system in real time. Because a plurality of loops in the cathode protection system are connected in parallel, the voltage of each loop is equal, and the resistance of each loop is different, the corresponding current value of each loop is different. It follows that the current value through each loop may reflect the operating condition of each loop.

For example, the current control device may detect the current value in each loop in real time through the included current detection module. The current detection module may be a device such as a current sensor that can be used to detect a current value, which is not specifically limited in this embodiment of the present application.

Alternatively, after the current value of each of the plurality of loops in the cathodic protection system is obtained, a plurality of current values can also be displayed. Therefore, if the current control device fails and the resistance cannot be automatically adjusted, the monitoring terminal can take corresponding measures according to the displayed current values.

Step 302: and judging whether a problem loop exists in the plurality of loops according to the detected current values, wherein the problem loop is a loop with a current value not within the range of the protection current value.

The current control device may obtain the range of protection current values after detecting the current value of each of the plurality of loops in the cathodic protection system. The protection current value range may be a current value range set by a user and stored in the current control device in advance, or may be a current value range of a user input received by the current control device at the present time. In addition, the protection current value range refers to a reasonable current value range that enables the pipe to be neither in an over-protection state nor in an under-protection state.

After the protection current value range is obtained, the current control device may determine whether the obtained current value of each loop is within the protection current value range, and if the current value of a loop in the multiple loops is not within the protection current value range, the loop may be determined as a problem loop. The number of problem loops may be 1 or more than 1.

For example, if three loops, namely an x loop, a y loop and a z loop, are shared in the cathodic protection system, the protection current value range is 10A-20A, at a certain moment, the current control device detects that the current value of the x loop is 5a, the current value of the y loop is 15a, and the current value of the z loop is 25A, and since the current values of the x loop and the z loop are not between 10A-20A, it can be determined that a problem loop exists in the loops, and the problem loop is the x loop and the z loop.

Step 303: if a plurality of loops have problems, adjusting the current in the problem loop according to the current value of the problem loop and the protection current value range, and returning to the step 201 until no problem loop exists in the plurality of loops.

When the problem loops exist in the multiple loops, the current control device can adjust the current in the problem loops according to the current value of the problem loops and the protection current value range.

For example, the current control means may determine whether the current value of the problem circuit is greater than the upper limit value or less than the lower limit value of the protection current value range. If the current value of the problem loop is larger than the upper limit value of the protection current value range, the current control device can increase the resistance in the problem loop so as to reduce the current in the problem loop; if the current value of the problem loop is smaller than the lower limit value of the protection current value range, the current control device can reduce the resistance in the problem loop so as to increase the current in the problem loop.

For example, in an implementation manner, the current control device can increase or decrease the resistance in the problem loop through one-time resistance adjustment, so as to adjust the current value in the problem loop to be within the protection current value range. Specifically, when the resistance value in the problem circuit is increased, the voltage in the problem circuit may be acquired, the current resistance value of the problem circuit is determined by the voltage of the problem circuit and the current value of the problem circuit, and the normal resistance value range is acquired by the voltage of the problem circuit and the protection current value range. Thereafter, a first difference between the present resistance value of the problem loop and a lower limit of the normal resistance value range is determined, and a second difference between the present resistance value of the problem loop and an upper limit of the normal resistance value range is determined. And selecting any value between the first difference and the second difference as an adjusting value, and increasing the resistance in the problem loop by the adjusting value so as to enable the current in the problem loop to be in a protection current value range.

Accordingly, when the resistance value in the problem circuit is reduced, the voltage in the problem circuit can be obtained, the current resistance value of the problem circuit is determined by the voltage of the problem circuit and the current value of the problem circuit, and the normal resistance value range is obtained by the voltage of the problem circuit and the protection current value range. And then, determining a third difference value between the upper limit value of the normal resistance value range and the current resistance value of the problem loop, determining a fourth difference value between the lower limit value of the normal resistance value range and the current resistance value of the problem loop, selecting any value between the third difference value and the fourth difference value as an adjusting value, and reducing the resistance in the problem loop by the adjusting value, so that the current in the problem loop is in a protection current value range.

Alternatively, in another possible implementation manner, the current control device may also adjust the current in the problem loop to be within the protection current value range through multiple resistance adjustments. Specifically, the current control means may increase or decrease the resistance in the problem loop by a first value at every first period, wherein the first value causes a change in the current in the problem loop smaller than a difference between an upper limit value and a lower limit value of the protection current value range. In the process of adjusting the resistor, the current control device can detect the current in the problem loop in real time through the current detection module, if the current value after the adjustment in the problem loop is detected to be still not in the range of the protection current value, the resistor in the problem loop is continuously adjusted according to the first duration, and when the current after the adjustment in the problem loop is detected to be in the range of the protection current value, the current control device can stop adjusting the resistor in the problem loop, so that the adjustment of the current in the problem loop is stopped. The first time period may be 60 seconds, 80 seconds, or any time period from 60 seconds to 80 seconds, or may be other time periods, and the specific adjustment period is determined according to the application environment of the current control device, which is not limited in this embodiment of the application.

Alternatively, in adjusting the current in the problem loop by adjusting the resistance in the problem loop, since the span range of the resistance in the problem loop is limited, there may be a case where the current still fails to be within the protection current value range when the resistance has been adjusted to the maximum or minimum span value. Based on this, when the current control device detects that the regulated current in the problem loop is not in the protection current value range and the resistance in the problem loop is regulated to the maximum value or the minimum value of the measuring range, a cutting instruction can be generated, and the safety module is controlled through the cutting instruction to cut off the problem loop. Wherein the safety module can feed back a feedback signal for indicating that the disconnection is completed after the problem loop is disconnected. At this time, the current control device can further generate an alarm instruction, and the alarm instruction is sent to the monitoring terminal of the cathode protection system through the alarm module, so that monitoring personnel can perform corresponding treatment according to the alarm instruction received by the monitoring terminal. It should be noted that the alarm instruction may be a sound signal, and the sound signals corresponding to different loops may be different, so that the monitoring terminal connected to the current control device can prompt monitoring personnel in time by playing the sound signal, so that the monitoring personnel can know the fault in the loop in time and quickly locate the fault loop.

Therefore, after the problem circuit is adjusted, the current control device can continuously detect the current value of each loop and continuously adjust the current in the determined problem loop in the manner described above until the current in each loop of the plurality of loops is within the protection current value range, that is, until no problem loop exists in the plurality of loops, the current adjustment is stopped, and the current of each loop is continuously monitored in real time.

In the embodiment of the application, the current value of each loop in a plurality of loops in a cathode protection system is obtained, the problem loop is determined from the plurality of loops based on the obtained current values, the problem loop refers to a loop of which the current value is not in the range of the protection current value, and then the current in the problem loop is adjusted based on the current value of the problem loop and the range of the protection current value.

In addition, in the embodiment of the application, when it is detected that the current adjusted in the problem loop is not in the range of the protection current value and the resistance in the problem loop is adjusted to the maximum value or the minimum value of the measurement range, the current control device can cut off the problem loop in time and send an alarm instruction to the monitoring terminal, so that monitoring personnel can know the fault in the loop in time.

Fig. 4 is a block diagram illustrating a control apparatus 400 according to an exemplary embodiment of the present application, and a control module in the current control device shown in fig. 1 may be integrated into the control apparatus 400.

In general, the control device 400 includes: a processor 401 and a memory 402.

Processor 401 may include one or more processing cores such as a 4-core processor, an 8-core processor, and the like. The processor 401 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 401 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 401 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed by the display screen. In some embodiments, the processor 401 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.

Memory 402 may include one or more computer-readable storage media, which may be non-transitory. Memory 402 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 402 is used to store at least one instruction for execution by processor 401 to implement the current control method provided by the method embodiments herein.

In some embodiments, the control device 400 may further optionally include: a peripheral interface 403 and at least one peripheral. The processor 401, memory 402 and peripheral interface 403 may be connected by bus or signal lines. Each peripheral may be connected to the peripheral interface 403 via a bus, signal line, or circuit board. Specifically, the peripheral device includes: at least one of radio frequency circuitry 404, touch screen display 405, camera 406, audio circuitry 407, positioning components 408, and power supply 409.

The peripheral interface 403 may be used to connect at least one peripheral related to I/O (Input/Output) to the processor 401 and the memory 402. In some embodiments, processor 401, memory 402, and peripheral interface 403 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 401, the memory 402 and the peripheral interface 403 may be implemented on a separate chip or circuit board, which is not limited by this embodiment.

The Radio Frequency circuit 404 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 404 communicates with a communication network and other communication devices via electromagnetic signals. The rf circuit 404 converts an electrical signal into an electromagnetic signal to transmit, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 404 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuitry 404 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: metropolitan area networks, various generation mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the rf circuit 404 may further include NFC (Near Field Communication) related circuits, which are not limited in this application.

The display screen 405 is used to display a UI (user interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display screen 405 is a touch display screen, the display screen 405 also has the ability to capture touch signals on or over the surface of the display screen 405. The touch signal may be input to the processor 401 as a control signal for processing. At this point, the display screen 405 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display screen 405 may be one, providing the front panel of the control device 400; in other embodiments, the display screen 405 may be at least two, respectively disposed on different surfaces of the control device 400 or in a folded design; in still other embodiments, the display screen 405 may be a flexible display screen disposed on a curved surface or a folded surface of the control device 400. Even further, the display screen 405 may be arranged in a non-rectangular irregular pattern, i.e. a shaped screen. The Display screen 405 may be made of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), and other materials.

The camera assembly 406 is used to capture images or video. Optionally, camera assembly 406 includes a front camera and a rear camera. Generally, a front camera is disposed at a front panel of a terminal, and a rear camera is disposed at a rear surface of the terminal. In some embodiments, the number of the rear cameras is at least two, and the rear cameras are any one of a main camera, a depth-of-field camera, a wide-angle camera and a telephoto camera, so as to implement a background blurring function by fusing the main camera and the depth-of-field camera, implement panoramic shooting and a VR (virtual reality) shooting function by fusing the main camera and the wide-angle camera, or implement other fusion shooting functions. In some embodiments, camera assembly 406 may also include a flash. The flash lamp can be a single-color temperature flash lamp or a double-color temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.

The audio circuit 407 may include a microphone and a speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals into the processor 401 for processing, or inputting the electric signals into the radio frequency circuit 404 to realize voice communication. For stereo capture or noise reduction purposes, the microphones may be multiple and located at different locations on the control device 400. The microphone may also be an array microphone or an omni-directional pick-up microphone. The speaker is used to convert electrical signals from the processor 401 or the radio frequency circuit 404 into sound waves. The loudspeaker can be a traditional film loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, the speaker can be used for purposes such as converting an electric signal into a sound wave audible to a human being, or converting an electric signal into a sound wave inaudible to a human being to measure a distance. In some embodiments, audio circuitry 407 may also include a headphone jack.

The positioning component 408 is used to locate the current geographic Location of the controlling device 400 for navigation or LBS (Location Based Service). The Positioning component 408 may be a Positioning component based on the GPS (Global Positioning System) of the united states, the beidou System of china, the graves System of russia, or the galileo System of the european union.

The power supply 409 is used to supply power to the various components in the control device 400. The power source 409 may be alternating current, direct current, disposable or rechargeable. When power source 409 comprises a rechargeable battery, the rechargeable battery may support wired or wireless charging. The rechargeable battery may also be used to support fast charge technology.

Those skilled in the art will appreciate that the configuration shown in fig. 4 does not constitute a limitation of the control device 400, and may include more or fewer components than those shown, or combine certain components, or employ a different arrangement of components.

Embodiments of the present application further provide a non-transitory computer-readable storage medium, where instructions in the storage medium, when executed by a processor of a control device, enable a smart device to perform the current control method in the cathodic protection system provided in the embodiment shown in fig. 3.

Embodiments of the present application further provide a computer program product containing instructions, which when run on a computer, cause the computer to execute the current control method in the cathodic protection system provided in the embodiment shown in fig. 3.

It will be understood by those skilled in the art that all or part of the steps of implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

In summary, the present application is only an alternative embodiment and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method of current control in a cathodic protection system, the method comprising:

detecting a current value of each loop in a plurality of loops in a cathodic protection system;

if a problem loop exists in the loops, adjusting the current in the problem loop according to the current value of the problem loop and the protection current value range, and returning to the step of detecting the current value of each loop in the loops in the cathode protection system until no problem loop exists in the loops;

wherein, the adjusting the current in the problem loop according to the current value in the problem loop and the protection current value range comprises: if the current value of the problem loop is larger than the upper limit value of the protection current value range, increasing the resistance in the problem loop to reduce the current in the problem loop; if the current value of the problem loop is smaller than the lower limit value of the protection current value range, reducing the resistance in the problem loop to increase the current in the problem loop;

the increasing the resistance within the problem loop includes:

the reducing resistance within the problem loop, comprising:

reducing the resistance within the problem loop by the first value.

2. The method of claim 1, wherein the method further comprises:

3. The method of claim 1 or 2, wherein after detecting the current value of each of the plurality of loops in the cathodic protection system, further comprising:

displaying the plurality of current values.

4. A current control device in a cathodic protection system is characterized in that the current control device is connected with a potentiostat through an anode cable and is connected with a plurality of anodes, and the current control device comprises a plurality of current detection modules, a control module and a plurality of current regulation modules;

the control module is used for judging whether a problem loop exists in the loops according to the received current values, if the problem loop exists in the loops, generating an adjusting instruction according to the current value of the problem loop and a protection current value range, sending the adjusting instruction to the current adjusting module in the problem loop, returning to the step of judging whether the problem loop exists in the loops according to the received current values until the problem loop does not exist in the loops, wherein the problem loop refers to a loop of which the current value is not in the protection current value range in the loops;

the current adjusting module in the problem loop among the plurality of current adjusting modules is used for receiving an adjusting instruction sent by the control module and adjusting the current in the problem loop according to the adjusting instruction;

wherein the plurality of current adjustment modules are a plurality of adjustable resistors;

the current adjusting module in the problem loop among the plurality of current adjusting modules is specifically configured to increase or decrease a resistance according to a first value carried in the adjusting instruction to adjust the current in the problem loop, where a change of the current in the problem loop caused by the first value is smaller than a difference between an upper limit value and a lower limit value of the protection current value range.

5. The current control device of claim 4, further comprising a display module, the display module coupled to the control module;

6. The current control device of claim 4, further comprising a safety module and an alarm module, both connected to the control module;

the control module is also used for generating a cutting instruction and sending the cutting instruction to the safety module if a problem loop exists in the loops and the resistance value of the current regulating module in the problem loop reaches the maximum value or the minimum value of the measuring range;

the safety module is used for receiving the cutting-off instruction, cutting off the problem loop based on the cutting-off instruction and returning a feedback signal for indicating that the problem loop is cut off to the control module;

7. The current control device of claim 6, wherein the safety module is a relay and the current detection module is a current sensor.