Circuit breaker, pipeline cathode protection control method, system, medium and equipment

Abstract

The present invention belongs to the field of circuit control technology, and in particular, relates to a protection control method, system, medium and equipment for circuit breakers and pipeline cathodes. The synchronous circuit breaker includes: a first contactor, a second contactor, a third contactor, a fourth contactor, a fifth contactor and a resistor, the fifth contactor is connected in parallel with an external signal device, one end of the first contactor and the second contactor is connected to the positive pole of a constant potential instrument, the other end of the first contactor is connected to a section of the resistor, the other end of the resistor is connected to the other end of the third contactor, the other end of the second contactor is connected to the anode, one end of the third contactor is connected to one end of the fourth contactor and is connected to the negative pole of the constant potential instrument, and the other end of the fourth contactor is connected to the pipeline. Through the present invention, the cathode protection power-off potential test function can be achieved without repeated disassembly, the cost is low, the use is convenient, it is compatible with various types of constant potential instruments, and the problem of current shock is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of circuit control, and in particular relates to a protection control method, system, medium and equipment for circuit breakers and pipeline cathodes. Background Art

[0002] Buried pipelines are usually protected from corrosion by forced current cathodic protection. In field applications, this method provides cathodic protection current for buried pipelines by installing a constant potential meter. When the constant potential meter is powered on, a multimeter and a reference electrode can be used to collect the power-on potential of the pipeline on the surface of the buried pipeline. At the moment of power failure, the constant potential meter uses a multimeter and a reference electrode to collect the power-off potential of the pipeline on the surface of the buried pipeline. The power-on potential is the potential that includes the IR drop of the soil (power-on potential = pipeline polarization potential + IR drop), which cannot reflect the actual situation of the pipeline being protected. According to the requirements of the Technical Specifications for Cathodic Protection of Buried Steel Pipelines in GB T-21448, the basis for determining whether the pipeline cathodic protection meets the standards is whether the pipeline power-off potential meets the standards.

[0003] The cathodic protection current output by a constant potentiostat can only protect buried pipelines in one area or a certain length. In order to ensure that all pipelines are cathodically protected, multiple constant potentiostats will be installed as needed at the production site to jointly provide cathodic protection for buried pipelines. When the constant potentiostat is powered on and outputs, the pipeline is continuously cathodically protected. When the staff tests the pipeline power-off potential, the constant potentiostats need to be powered off at the same time, and the power-off interval cannot exceed 3s. In view of the above reasons, when collecting the pipeline power-off potential, all constant potentiostats need to maintain a certain frequency of synchronous power-on and power-off operation, but at the production site, different models of constant potentiostats cannot achieve complete synchronous on and off.

[0004] Currently, there are many types of synchronous circuit breakers on the market, all of which are based on GPS clock timing to achieve synchronous on and off. When collecting pipeline power-off potential, it is necessary to install the GPS synchronous circuit breaker in the output circuit of the constant potentiostat, and synchronize the on and off of the output circuit of the constant potentiostat by agreeing on the time.

[0005] GPS synchronous circuit breakers are expensive and difficult to install. In actual applications, they will also generate large current impacting the constant potentiostat. The maximum current exceeds 70A (the rated output of the constant potentiostat is 50A). Long-term use will damage the constant potentiostat. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a protection control method, system, medium and equipment for a circuit breaker and a pipeline cathode.

[0007] The technical solution of the present invention to solve the above technical problem is as follows: a synchronous circuit breaker, comprising:

[0008] A first contactor, a second contactor, a third contactor, a fourth contactor, a fifth contactor and a resistor, the fifth contactor is connected in parallel with an external signal device, one end of the first contactor and the second contactor is connected to the positive electrode of a constant potential instrument, the other end of the first contactor is connected to a section of the resistor, the other end of the resistor is connected to the other end of the third contactor, the other end of the second contactor is connected to an anode, one end of the third contactor is connected to one end of the fourth contactor and to the negative electrode of the constant potential instrument, and the other end of the fourth contactor is connected to a pipeline.

[0009] The beneficial effects of the present invention are as follows: this patent is to produce a circuit breaker that can receive control signals from a SCADA system. It is installed on the line of a constant potentiostat once and can be used at any time for life. It can be conveniently set and controlled remotely by a SCADA system without repeated disassembly. It is low-cost, easy to use, compatible with various types of constant potentiostats, and solves the problem of current shock.

[0010] Based on the above technical solution, the present invention can also be improved as follows.

[0011] Another technical solution of the present invention to solve the above technical problem is as follows: A pipeline cathode protection control method, using the synchronous circuit breaker according to claim 1, comprising:

[0012] Step 1, obtain the control instructions of the SCADA host computer;

[0013] Step 2: Control the synchronous circuit breaker according to the control instruction.

[0014] The beneficial effects of the present invention are as follows: this patent is to produce a circuit breaker that can receive control signals from a SCADA system. It is installed on the line of a constant potentiostat once and can be used at any time for life. It can be conveniently set and controlled remotely by a SCADA system without repeated disassembly. It is low-cost, easy to use, compatible with various types of constant potentiostats, and solves the problem of current shock.

[0015] Further, the step 2 is specifically as follows:

[0016] When the control instruction is to turn on the power, the second contactor of the synchronous circuit breaker is controlled to attract the anode cable, and the fourth contactor is closed at the same time;

[0017] When the control instruction is to cut off the power, the first contactor and the third contactor of the synchronous circuit breaker are controlled to close.

[0018] Further, the controlling of the synchronous circuit breaker is specifically as follows:

[0019] When the control command is to turn on the power, the second contactor of the synchronous circuit breaker is controlled by the synchronous on-off command button to attract the anode cable, and the fourth contactor is closed at the same time;

[0020] When the control instruction is to cut off the power, the first contactor and the third contactor of the synchronous circuit breaker are controlled to close through the synchronous on-off instruction button.

[0021] Further, the controlling of the synchronous circuit breaker is specifically as follows:

[0022] When the control command is to turn on the power, the second contactor of the synchronous circuit breaker is controlled by the synchronous on-off command button to attract the anode cable, and the fourth contactor is closed at the same time;

[0023] When the control instruction is to cut off the power, the first contactor and the third contactor of the synchronous circuit breaker are controlled to close through the synchronous on-off instruction button.

[0024] Further, the step 1 is specifically as follows:

[0025] Obtain control instructions from the SCADA host computer through the preset analog input module.

[0026] Another technical solution of the present invention to solve the above technical problem is as follows: A pipeline cathode protection system, comprising:

[0027] Acquisition module, used to obtain control instructions from the SCADA host computer;

[0028] A control module is used to control the synchronous circuit breaker according to the control instruction.

[0029] The beneficial effects of the present invention are as follows: this patent is to produce a circuit breaker that can receive control signals from a SCADA system. It is installed on the line of a constant potentiostat once and can be used at any time for life. It can be conveniently set and controlled remotely by a SCADA system without repeated disassembly. It is low-cost, easy to use, compatible with various types of constant potentiostats, and solves the problem of current shock.

[0030] Furthermore, the control module is specifically used for:

[0031] When the control instruction is to turn on the power, the second contactor of the synchronous circuit breaker is controlled to attract the anode cable, and the fourth contactor is closed at the same time;

[0032] When the control instruction is to cut off the power, the first contactor and the third contactor of the synchronous circuit breaker are controlled to close.

[0033] Further, the controlling of the synchronous circuit breaker is specifically as follows:

[0034] When the control command is to turn on the power, the second contactor of the synchronous circuit breaker is controlled by the synchronous on-off command button to attract the anode cable, and the fourth contactor is closed at the same time;

[0035] When the control instruction is to cut off the power, the first contactor and the third contactor of the synchronous circuit breaker are controlled to close through the synchronous on-off instruction button.

[0036] Further, the controlling of the synchronous circuit breaker is specifically as follows:

[0037] When the control command is to turn on the power, the second contactor of the synchronous circuit breaker is controlled by the synchronous on-off command button to attract the anode cable, and the fourth contactor is closed at the same time;

[0038] When the control instruction is to cut off the power, the first contactor and the third contactor of the synchronous circuit breaker are controlled to close through the synchronous on-off instruction button.

[0039] Furthermore, the acquisition module is specifically used for:

[0040] Obtain control instructions from the SCADA host computer through the preset analog input module.

[0041] Another technical solution of the present invention to solve the above technical problem is as follows: a storage medium, in which instructions are stored. When a computer reads the instructions, the computer executes a pipeline cathode protection control method as described in any one of the above items.

[0042] The beneficial effects of the present invention are as follows: this patent is to produce a circuit breaker that can receive control signals from a SCADA system. It is installed on the line of a constant potentiostat once and can be used at any time for life. It can be conveniently set and controlled remotely by a SCADA system without repeated disassembly. It is low-cost, easy to use, compatible with various types of constant potentiostats, and solves the problem of current shock.

[0043] Another technical solution of the present invention to solve the above technical problem is as follows: an electronic device comprises the above storage medium and a processor for executing instructions in the above storage medium.

[0044] The beneficial effects of the present invention are as follows: this patent is to produce a circuit breaker that can receive control signals from a SCADA system. It is installed on the line of a constant potentiostat once and can be used at any time for life. It can be conveniently set and controlled remotely by a SCADA system without repeated disassembly. It is low-cost, easy to use, compatible with various types of constant potentiostats, and solves the problem of current shock. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic diagram of a synchronous circuit breaker provided for an embodiment of a synchronous circuit breaker of the present invention;

[0046] Figure 2 A schematic flow chart of an embodiment of a pipeline cathode protection control method provided by the present invention;

[0047] Figure 3 A structural framework diagram is provided for an embodiment of a pipeline cathode protection control system of the present invention.

[0048] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0049] KM, fifth contactor, KM1, first contactor, KM2, second contactor, KM3, third contactor, KM4, fourth contactor, R, resistor. DETAILED DESCRIPTION

[0050] The principles and features of the present invention are described below. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0051] like Figure 1 As shown, a synchronous circuit breaker comprises:

[0052] The first contactor KM1, the second contactor KM2, the third contactor KM3, the fourth contactor KM4, the fifth contactor KM and the resistor R, the fifth contactor KM is connected in parallel with the external signal device, one end of the first contactor KM1 and the second contactor KM2 are connected to the positive pole of the constant potential instrument, the other end of the first contactor KM1 is connected to one end of the resistor R, the other end of the resistor R is connected to the other end of the third contactor KM3, the other end of the second contactor KM2 is connected to the anode, one end of the third contactor KM3 is connected to one end of the fourth contactor KM4 and to the negative pole of the constant potential instrument, and the other end of the fourth contactor KM4 is connected to the pipeline.

[0053] In some possible implementations, this patent produces a circuit breaker that can receive control signals from a SCADA system. It is installed on the line of a constant potentiostat and can be used at any time for life. It can be conveniently set and controlled remotely by a SCADA system without repeated disassembly. It is low-cost, easy to use, compatible with various types of constant potentiostats, and solves the problem of current shock.

[0054] It should be noted that the external signal device can be: a single-chip microcomputer, an RTU or a PLC system digital output module, which should meet the requirements of providing an active signal with a 24V (DC) direct current power supply.

[0055] The digital input module can be any display device or equipment that allows input of data.

[0056] The synchronous on-off device in the figure is the synchronous circuit breaker, KM is the fifth contactor, and the external signal is connected to the 24V control coil of the contactor. The contacts of the first contactor KM1 and the third contactor KM3 are normally open contacts, and the contacts of the second contactor KM2 and the fourth contactor KM4 are normally closed contacts. In normal operation, the second contactor KM2 and the fourth contactor KM4 are turned on, the pipeline, the anode bed and the constant potentiostat form a cathodic protection circuit, and the constant potentiostat works normally. When the SCADA system issues a synchronous on-off command, the contactor KM coil is energized, the first contactor KM1 and the third contactor KM3 are closed, the second contactor KM2 and the fourth contactor KM4 are disconnected, the pipeline and the anode bed are cut off from the cathodic protection circuit, and the resistor R and the constant potentiostat form a circuit. Due to the existence of resistor R, the impact and burning problems caused by the instantaneous current increase of the constant potentiostat can be effectively avoided, so that the constant potentiostat always maintains normal operation. At the moment when the pipeline is cut off from the cathodic protection circuit, it is in an instantaneous disconnected state, and the power-off potential can be measured. Since the power-off potential needs to be measured repeatedly, through the effective control of the SCADA system, the pipeline can be repeatedly connected and cut off the cathodic protection circuit, so as to measure the power-off potential of the pipeline repeatedly and repeatably to verify the pipeline cathodic protection effect, while avoiding the risk of damaging the constant potentiostat. For the selection of analog load R, the RX24 series fixed value resistor is selected after comparing the applicability, economy and reliability. The optional power range of its standard model products matches this transformation. This type of load resistor has low cost, stable and reliable operation, and good heat dissipation.

[0057] like Figure 2 As shown, a pipeline cathode protection control method, using the synchronous circuit breaker according to claim 1, comprises:

[0058] Step 1, obtain the control instructions of the SCADA host computer;

[0059] Step 2: Control the synchronous circuit breaker according to the control instruction.

[0060] In some possible implementations, this patent produces a circuit breaker that can receive control signals from a SCADA system. It is installed on the line of a constant potentiostat and can be used at any time for life. It can be conveniently set and controlled remotely by a SCADA system without repeated disassembly. It is low-cost, easy to use, compatible with various types of constant potentiostats, and solves the problem of current shock.

[0061] It should be noted that a set of logic control programs is developed, written into the PLC, and applied on the SCADA system host computer. A synchronous on-off command button is added to the SCADA host computer control screen, and an analog input is added at the same time, which is set to different modes such as 15s (off 3s, on 12s), 18s (off 3s, on 15s), 20s (off 3s, on 17s), and 30s (off 3s, on 27s). A dual-channel circuit breaker is installed on the constant potentiostat that needs to be controlled. When the constant potentiostat needs to be powered on, the circuit breaker closes the anode cable to ensure the normal output of the constant potentiostat. When the constant potentiostat needs to be powered off, the circuit breaker closes the dummy load to ensure that the constant potentiostat continues to operate while disconnecting the actual load of the buried pipeline.

[0062] When the host computer issues instructions, all controlled circuit breakers begin to open and close according to the instructions. The response time of PLC is 20ms, which is more accurate than the GPS clock timing. In addition, because the circuit breaker disconnects the buried pipeline load and simultaneously incorporates a dummy load, the output of the constant potentiostat is not affected and no large current shock is generated.

[0063] Preferably, in any of the above embodiments, step 2 is specifically:

[0064] When the control instruction is to turn on the power, the second contactor of the synchronous circuit breaker is controlled to attract the anode cable, and the fourth contactor is closed at the same time;

[0065] When the control instruction is to cut off the power, the first contactor and the third contactor of the synchronous circuit breaker are controlled to close.

[0066] Preferably, in any of the above embodiments, the controlling of the synchronous circuit breaker is specifically:

[0067] When the control command is to turn on the power, the second contactor of the synchronous circuit breaker is controlled by the synchronous on-off command button to attract the anode cable, and the fourth contactor is closed at the same time;

[0068] When the control instruction is to cut off the power, the first contactor and the third contactor of the synchronous circuit breaker are controlled to close through the synchronous on-off instruction button.

[0069] Preferably, in any of the above embodiments, the controlling of the synchronous circuit breaker is specifically:

[0070] When the control command is to turn on the power, the second contactor of the synchronous circuit breaker is controlled by the synchronous on-off command button to attract the anode cable, and the fourth contactor is closed at the same time;

[0071] When the control instruction is to cut off the power, the first contactor and the third contactor of the synchronous circuit breaker are controlled to close through the synchronous on-off instruction button.

[0072] Preferably, in any of the above embodiments, step 1 is specifically:

[0073] Obtain control instructions from the SCADA host computer through the preset analog input module.

[0074] like Figure 3 As shown, a pipeline cathode protection system comprises:

[0075] The acquisition module 100 is used to obtain the control instructions of the SCADA host computer;

[0076] The control module 200 is used to control the synchronous circuit breaker according to the control instruction.

[0077] In some possible implementations, this patent produces a circuit breaker that can receive control signals from a SCADA system. It is installed on the line of a constant potentiostat and can be used at any time for life. It can be conveniently set and controlled remotely by a SCADA system without repeated disassembly. It is low-cost, easy to use, compatible with various types of constant potentiostats, and solves the problem of current shock.

[0078] Preferably, in any of the above embodiments, the control module 200 is specifically used for:

[0079] When the control instruction is to turn on the power, the second contactor of the synchronous circuit breaker is controlled to attract the anode cable, and the fourth contactor is closed at the same time;

[0080] When the control instruction is to cut off the power, the first contactor and the third contactor of the synchronous circuit breaker are controlled to close.

[0081] Preferably, in any of the above embodiments, the controlling of the synchronous circuit breaker is specifically:

[0082] When the control command is to turn on the power, the second contactor of the synchronous circuit breaker is controlled by the synchronous on-off command button to attract the anode cable, and the fourth contactor is closed at the same time;

[0083] When the control instruction is to cut off the power, the first contactor and the third contactor of the synchronous circuit breaker are controlled to close through the synchronous on-off instruction button.

[0084] Preferably, in any of the above embodiments, the controlling of the synchronous circuit breaker is specifically:

[0085] When the control command is to turn on the power, the second contactor of the synchronous circuit breaker is controlled by the synchronous on-off command button to attract the anode cable, and the fourth contactor is closed at the same time;

[0086] When the control instruction is to cut off the power, the first contactor and the third contactor of the synchronous circuit breaker are controlled to close through the synchronous on-off instruction button.

[0087] Preferably, in any of the above embodiments, the acquisition module is specifically used for:

[0088] Obtain control instructions from the SCADA host computer through the preset analog input module.

[0089] Another technical solution of the present invention to solve the above technical problem is as follows: a storage medium, in which instructions are stored. When a computer reads the instructions, the computer executes a pipeline cathode protection control method as described in any one of the above items.

[0090] In some possible implementations, this patent produces a circuit breaker that can receive control signals from a SCADA system. It is installed on the line of a constant potentiostat and can be used at any time for life. It can be conveniently set and controlled remotely by a SCADA system without repeated disassembly. It is low-cost, easy to use, compatible with various types of constant potentiostats, and solves the problem of current shock.

[0091] Another technical solution of the present invention to solve the above technical problem is as follows: an electronic device comprises the above storage medium and a processor for executing instructions in the above storage medium.

[0092] In some possible implementations, this patent produces a circuit breaker that can receive control signals from a SCADA system. It is installed on the line of a constant potentiostat and can be used at any time for life. It can be conveniently set and controlled remotely by a SCADA system without repeated disassembly. It is low-cost, easy to use, compatible with various types of constant potentiostats, and solves the problem of current shock.

[0093] The reader should understand that in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0094] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the method embodiments described above are only illustrative, for example, the division of steps is only a logical function division, and there may be other division methods in actual implementation, such as multiple steps can be combined or integrated into another step, or some features can be ignored or not executed.

[0095] If the above method is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0096] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A pipeline cathode protection control method using a synchronous circuit breaker, It is characterized in that include: Step 1, obtain the control instructions of the SCADA host computer; Step 2, controlling the synchronous circuit breaker according to the control instruction; The synchronous circuit breaker comprises: A first contactor, a second contactor, a third contactor, a fourth contactor, a fifth contactor and a resistor, wherein the fifth contactor is connected in parallel with an external signal device, one end of the first contactor and the second contactor is connected to the positive electrode of a constant potential instrument, the other end of the first contactor is connected to one end of the resistor, the other end of the resistor is connected to the other end of the third contactor, the other end of the second contactor is connected to an anode, one end of the third contactor is connected to one end of the fourth contactor and to the negative electrode of the constant potential instrument, and the other end of the fourth contactor is connected to a pipeline; The step 2 is specifically as follows: When the control instruction is to turn on the power, the second contactor of the synchronous circuit breaker is controlled to attract the anode cable, and the fourth contactor is closed at the same time; When the control instruction is to cut off the power, the first contactor and the third contactor of the synchronous circuit breaker are controlled to close; The control of the synchronous circuit breaker is specifically as follows: When the control command is to turn on the power, the second contactor of the synchronous circuit breaker is controlled by the synchronous on-off command button to attract the anode cable, and the fourth contactor is closed at the same time; When the control instruction is to cut off the power, the first contactor and the third contactor of the synchronous circuit breaker are controlled to close through the synchronous on-off instruction button.

2. A pipeline cathode protection control method according to claim 1, It is characterized in that The control of the synchronous circuit breaker is specifically as follows: When the control command is to turn on the power, the second contactor of the synchronous circuit breaker is controlled by the synchronous on-off command button to attract the anode cable, and the fourth contactor is closed at the same time; When the control instruction is to cut off the power, the first contactor and the third contactor of the synchronous circuit breaker are controlled to close through the synchronous on-off instruction button.

3. A pipeline cathode protection control method according to claim 1, It is characterized in that The step 1 is specifically as follows: Obtain control instructions from the SCADA host computer through preset digital input modules or coils.

4. A pipeline cathode protection system, using a pipeline cathode protection method as claimed in claim 1, It is characterized in that The system includes: Acquisition module, used to obtain control instructions from the SCADA host computer; A control module is used to control the synchronous circuit breaker according to the control instruction.

5. A pipeline cathode protection system according to claim 4, It is characterized in that The control module is specifically used for: When the control instruction is to turn on the power, the second contactor of the synchronous circuit breaker is controlled to attract the anode cable, and the fourth contactor is closed at the same time; When the control instruction is to cut off the power, the first contactor and the third contactor of the synchronous circuit breaker are controlled to close.

6. A medium, It is characterized in that The medium stores instructions, and when a computer reads the instructions, the computer executes a pipeline cathode protection control method as claimed in any one of claims 1 to 3.

7. A device, It is characterized in that The invention comprises the storage medium as claimed in claim 6 and a processor for executing instructions in the storage medium.

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