Insulation monitoring and positioning device and system applied to offshore power platform

Abstract

The utility model discloses an insulation monitoring and positioning device and system applied to an offshore power platform, and the device comprises an insulation monitoring and positioning module which comprises a data collection unit, a data transmission unit, and an insulation detection and fault positioning unit, and is used for transmitting a test current to a field loop to position a fault loop when an insulation resistance value is lower than an alarm value, when it is determined that the accessed loop does not have the fault, the multi-loop switching matrix module is triggered; the multi-loop switching matrix module comprises a plurality of relay groups, and each relay group is connected with a plurality of field loops; and after being triggered, the microprocessor enables the insulation monitoring and positioning module to be switched to be connected with different relay groups according to a preset polling instruction, and sends a test current to a corresponding field loop and receives a current signal acquired by the current transformer until a fault loop is positioned or the polling instruction is executed completely. According to the invention, equipment cost and field space can be saved.

Description

Technical Field

[0001] This application relates to the field of offshore power supply technology, and in particular to an insulation monitoring and positioning device and system for offshore power platforms. Background Technology

[0002] Offshore oil production is a high-risk operation with stringent requirements for power system stability. Most equipment on offshore platforms uses 400V power, and the humid marine environment leads to frequent insulation failures in electrical equipment, significantly impacting safe operation. Furthermore, space is limited on offshore platforms, with hundreds of low-voltage circuits. Existing field insulation monitoring systems require multiple locators to monitor the insulation of these circuits. For example, one existing solution involves one insulation monitor that can connect to multiple (up to 50) insulation locators via an RS-485 interface (BS bus protocol); one locator connects to a 12-channel current transformer (i.e., one locator connects to 12 circuits). Such extensive hardware requirements result in complex installation, high system costs, and limited widespread implementation. Summary of the Invention

[0003] In view of this, the technical problem to be solved by this application is to provide an insulation monitoring and positioning device and system for offshore power platforms, so as to solve the problems of large and complex overall equipment systems for insulation monitoring and positioning in the technology, which lead to complicated installation and high system configuration costs.

[0004] To address the aforementioned problems, one aspect of this application provides an insulation monitoring and location device for offshore power platforms, comprising: an insulation monitoring and location module, including: a data acquisition unit for monitoring and obtaining the insulation resistance value to ground of the power platform busbar; an insulation detection and fault location unit, including a microprocessor for sending a test current to the field circuit to locate the faulty circuit when the insulation resistance value is lower than an alarm value, and triggering a multi-circuit switching matrix module when it is determined that there is no fault in the connected circuit; a data transmission unit for uploading the received insulation resistance value, current signal, and operating data of the insulation monitoring and location module to a remote platform; and a multi-circuit switching matrix module electrically connected to the insulation monitoring and location module; the multi-circuit switching matrix module includes multiple relay groups, each relay group connecting to multiple field circuits; wherein, upon triggering, the microprocessor, according to a preset polling instruction, causes the insulation monitoring and location module to switch connections to different relay groups, enabling the insulation monitoring and location module to connect to different field circuit signals, and sending a test current to the corresponding field circuit and receiving current signals collected by current transformers, until the faulty circuit is located or the polling instruction is completed.

[0005] Another aspect of this application provides an insulation monitoring system for offshore power platforms, comprising:

[0006] Current transformers are installed in the field circuits of the offshore power platform, with one current transformer corresponding to each field circuit; an insulation monitoring and positioning device in any embodiment is electrically connected to multiple current transformers; a cloud platform is communicatively connected to the insulation monitoring and positioning device, receives its operating status data and the insulation resistance and current signals received by the device, and qualitatively and quantitatively analyzes the insulation level and insulation changes of the electrical equipment in operation.

[0007] Another aspect of this application provides an insulation monitoring and location device for offshore power platforms, comprising: an insulation monitoring and location module, including an integrated data acquisition unit, an insulation detection and fault location unit, and a data transmission unit; wherein: the data acquisition unit is used to monitor and obtain the insulation resistance value to ground of the power platform busbar; the insulation detection and fault location unit includes a microprocessor used to send a test current to the field circuit to locate the faulty circuit when the insulation resistance value is lower than the alarm value; and to trigger a multi-circuit switching matrix module when there is no fault in the currently connected circuit; the data transmission unit transmits the received insulation resistance value and current signal, as well as the insulation... The monitoring and positioning module uploads its operational data to a remote platform; the multi-circuit switching matrix module includes multiple relay groups encapsulated as one unit; it is electrically connected to the insulation monitoring and positioning module; each of the multiple relay groups connects to multiple field circuits; when triggered, the microprocessor, according to a preset polling instruction, causes the insulation monitoring and positioning module to switch between different relay groups in turn, enabling the insulation monitoring and positioning module to communicate with different field circuit signals. The insulation monitoring and positioning module sends test current to the current transformer set in the corresponding field circuit and receives the current signal collected by the current transformer until the fault circuit is located or the polling instruction is completed. Attached Figure Description

[0008] Figure 1 The diagram shown is a structural schematic of an insulation monitoring and positioning device provided in one embodiment of this application;

[0009] Figure 2 The diagram shown is a schematic representation of an insulation monitoring and positioning system architecture provided in one embodiment of this application.

[0010] Figure 3 The illustrated embodiment is a schematic diagram of the steps of an insulation monitoring and positioning method provided in one embodiment. Detailed Implementation

[0011] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer and more understandable, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit the scope of this application.

[0012] In this application, the cloud platform may also be referred to as a remote platform, cloud system, remote system, or upper-level system.

[0013] With the development of unmanned and intelligent offshore oil platforms, the online insulation monitoring technology for electrical equipment needs to develop towards specialization, diversification, and intelligence. The multi-circuit online insulation monitoring and positioning system can not only monitor the insulation of electrical equipment in real time, but also identify insulation faults in electrical equipment through analysis and diagnosis, and formulate corresponding maintenance solutions to ensure the stable and safe operation of electrical equipment and reduce the probability of electrical equipment safety failures.

[0014] One aspect of this application provides an insulation monitoring and location device for offshore power platforms, comprising: an insulation monitoring and location module, including: a data acquisition unit for monitoring and obtaining the insulation resistance value to ground of the power platform busbar; an insulation detection and fault location unit, including a microprocessor for sending a test current to the field circuit to locate the faulty circuit when the insulation resistance value is lower than an alarm value, and triggering a multi-circuit switching matrix module when it is determined that there is no fault in the connected circuit; a data transmission unit for uploading the received insulation resistance value, current signal, and operating data of the insulation monitoring and location module to a remote platform; and a multi-circuit switching matrix module electrically connected to the insulation monitoring and location module; the multi-circuit switching matrix module includes multiple relay groups, each relay group connecting to multiple field circuits; wherein, after being triggered, the microprocessor causes the insulation monitoring and location module to switch connections to different relay groups according to a preset polling instruction, so that the insulation monitoring and location module is connected to different field circuit signals, and sends a test current to the current transformer set in the corresponding field circuit and receives the current signal collected by the current transformer, until the faulty circuit is located or the polling instruction is completed.

[0015] In at least one embodiment, multiple relay groups are packaged into a single unit to form a multi-loop switching matrix module.

[0016] In at least one embodiment, the data acquisition unit, the data transmission unit, and the insulation detection and fault location unit are packaged together to form an insulation monitoring and location module.

[0017] In at least one embodiment, the multi-loop switching matrix module includes 6-12 relay groups; each relay group connects to 12 field loops, and each field loop is equipped with a current transformer.

[0018] In at least one embodiment, the insulation monitoring and positioning module further includes an alarm unit for issuing a warning signal when the insulation resistance is lower than a warning value.

[0019] In at least one embodiment, the insulation monitoring and positioning module further includes a display unit for displaying one or more of the parameter settings of the insulation monitoring and positioning module, the received signal values, and alarm information.

[0020] In at least one embodiment, the preset polling command includes the number of relay groups to be switched and the switching time interval.

[0021] In at least one embodiment, the preset polling instruction is to switch 6-12 relay groups and switch them every 5 minutes.

[0022] In at least one embodiment, the insulation monitoring and positioning module determines that there is a fault in the field circuit based on the received current signal, issues an alarm signal, and transmits the current circuit fault information to the cloud platform.

[0023] In at least one embodiment, the multi-circuit switching matrix module further includes an active polling plan. The active polling plan is initiated according to a preset schedule. Under the active polling plan, the microprocessor enables the insulation monitoring and positioning module to switch and connect to different relay groups in turn, so that the insulation monitoring and positioning module can connect to different field circuit signals, and send test current to the current transformer set in the corresponding field circuit and receive the current signal collected by the current transformer, until the fault circuit is located or the active polling plan is completed.

[0024] Another aspect of this application provides an insulation monitoring system for offshore power platforms, comprising:

[0025] Current transformers are installed in the field circuits of the offshore power platform, with one current transformer corresponding to each field circuit; an insulation monitoring and positioning device in any embodiment is electrically connected to multiple current transformers; a cloud platform is communicatively connected to the insulation monitoring and positioning device, receives its operating status data and the insulation resistance and current signals received by the device, and qualitatively and quantitatively analyzes the insulation level and insulation changes of the electrical equipment in operation.

[0026] Another aspect of this application provides an insulation monitoring and location device for offshore power platforms, comprising: an insulation monitoring and location module, including an integrated data acquisition unit, an insulation detection and fault location unit, and a data transmission unit; wherein: the data acquisition unit is used to monitor and obtain the insulation resistance value to ground of the power platform busbar; the insulation detection and fault location unit includes a microprocessor used to send a test current to the field circuit to locate the faulty circuit when the insulation resistance value is lower than the alarm value; and to trigger a multi-circuit switching matrix module when there is no fault in the currently connected circuit; the data transmission unit transmits the received insulation resistance value and current signal, as well as the insulation... The monitoring and positioning module uploads its operational data to a remote platform; the multi-circuit switching matrix module includes multiple relay groups encapsulated as one unit; it is electrically connected to the insulation monitoring and positioning module; each of the multiple relay groups connects to multiple field circuits; when triggered, the microprocessor, according to a preset polling instruction, causes the insulation monitoring and positioning module to switch between different relay groups in turn, enabling the insulation monitoring and positioning module to communicate with different field circuit signals. The insulation monitoring and positioning module sends test current to the current transformer set in the corresponding field circuit and receives the current signal collected by the current transformer until the fault circuit is located or the polling instruction is completed.

[0027] The various aspects of this application will now be described in detail with reference to the accompanying drawings:

[0028] Figure 1The illustration shows an insulation monitoring and positioning device for an offshore power platform according to one embodiment of this application. The device includes an insulation monitoring and positioning module 100 and a multi-circuit switching matrix module 200. The insulation monitoring and positioning module 100 includes a data acquisition unit 10, an insulation detection and fault location unit 20, and a data transmission unit 30. The insulation monitoring and positioning module 100 is encapsulated as a single independent device module. The data acquisition unit 10 reads the operating status of the insulation monitoring and positioning module and the field circuit insulation data via an Ethernet interface using the MODBUS TCP protocol. The data transmission unit 30 uploads the data to a remote upper-level system or cloud platform using the OPC protocol. The multi-circuit switching matrix module 200 comprises several relay groups, such as relay groups 1 to n shown in the figure. In this application, the multi-circuit switching matrix module 200 preferably includes 12 relay groups. The multi-circuit switching matrix module 200 is encapsulated as a single independent device module. Typically, the insulation monitoring and location module 100 is installed in the field switchgear. The data acquisition unit 10 monitors the ground insulation resistance of the connected circuit. The insulation monitoring and location module 100 has preset alarm values ​​for the insulation resistance. When the detected insulation resistance is less than the alarm value, it indicates a circuit fault. Then, the insulation detection and fault location unit 20 sends a test current to the field circuit to locate the faulty circuit. If the current transformer of the currently connected circuit does not detect the test current signal, it is determined that there is no fault in the currently connected circuit and the multi-circuit switching matrix module is triggered. The multi-circuit switching matrix module is electrically connected to the insulation monitoring and location module and includes multiple relay groups. Each relay group connects to multiple field circuits, for example... As shown in circuits 1-n, upon receiving a trigger command, the microprocessor, according to a preset polling command, switches the insulation monitoring and location module 100 to different relay groups. This allows the insulation monitoring and location module 100 to sequentially connect to different field circuits in circuits 1-n. Each time the multi-circuit switching matrix module 200 switches different relay groups, the insulation detection and fault location unit 20 sends a test current to the current transformer set in the corresponding field circuit and receives the current signal collected by the current transformer. If the current signal collected by the current transformer is received, it means that the faulty circuit has been located; otherwise, it continues to switch different relay groups until the faulty circuit is located or the polling command is completed. Preferably, each multi-circuit switching matrix module 200 includes 12 relay groups, each relay group connects to 12 circuits, and each multi-circuit switching matrix module 200 can connect to 144 field circuits. Each field circuit is equipped with one current transformer, meaning that one insulation monitoring and location device can realize insulation monitoring and fault location of 144 field circuits by simply switching different relay groups by the multi-circuit switching matrix module 200.The specific process is as follows: Based on the set polling time, the 12 circuit groups are switched and polled sequentially, from group 1 to group 2, then to group 3 / ... / 12. After all 12 groups are switched, the system switches back to group 1, and so on. Alternatively, the number of switching groups can be flexibly configured according to the number of circuits. When the insulation monitor detects an insulation resistance alarm, it triggers the multi-circuit switching matrix module to poll the circuits (the polling time can be manually set and input, and this fixed input is saved as an internal system parameter). After locating the alarm channel, it can be set to poll again to check if other channels still have alarms. Compared with existing technologies, this reduces the investment in locator equipment, thereby reducing on-site installation space and lowering system configuration costs. Furthermore, a customized cloud platform for multi-circuit insulation online monitoring and location analysis is developed to improve the stability and safe operation of electrical equipment, meeting the development needs of unmanned and intelligent platforms. The number of relay groups can also be set according to the number of circuits on site. For example, if there are 36 circuits on site, only 3 relay groups are needed, which also saves the overall scale and cost of the multi-circuit switching matrix module.

[0029] In addition, the insulation monitoring and positioning module 100 also includes an alarm unit, which is used to issue an alarm signal when the insulation resistance is lower than the alarm value. The alarm signal can be an audible signal, a visual signal, etc. The insulation monitoring and positioning module 100 also includes a display unit, which is used to display the various parameter settings of the insulation monitoring and positioning module, the received signal values, and one or more alarm messages, so that on-site personnel can intuitively observe various data parameters through the display unit.

[0030] like Figure 2 The diagram illustrates an insulation monitoring system for an offshore power platform, comprising: current transformers installed in the field circuits of the offshore power platform, with one current transformer mounted on the cable of each field circuit; current transformers 1-n corresponding to field circuits 1-n in the diagram; an insulation monitoring and positioning device, consisting of an insulation monitoring and positioning module and a multi-circuit switching matrix module; the multi-circuit switching matrix module being electrically connected to multiple current transformers; and a cloud platform connected to the insulation monitoring and positioning device via a wireless communication network. This cloud platform receives operational status data, insulation resistance values, and current signals from the insulation monitoring and positioning device, and displays the insulation resistance to ground and leakage current values ​​in real time. It can display and qualitatively and quantitatively analyze the insulation level and insulation changes of operating electrical equipment using waveforms, data tables, and layout diagrams. It can automatically generate daily, monthly, and annual reports and periodically save data for analysis, management, and historical retrieval. The system also reserves an interface for connection to an advanced application platform for offshore oil platforms.

[0031] like Figure 3 The diagram illustrates an insulation monitoring and location method applied to offshore power platforms, comprising the following steps:

[0032] S1, an insulation monitoring and positioning device is installed between the power platform and the busbar and ground wire;

[0033] S2, current transformers are installed in the field circuits to be monitored by the power platform, with one current transformer corresponding to each field circuit;

[0034] S3, the insulation monitoring and positioning device receives the insulation resistance value of the bus to ground. When the insulation value is lower than the alarm value, it sends a test current to the field circuit. When it is determined that there is no fault in the current circuit, it triggers the multi-circuit switching matrix module.

[0035] S4. After the multi-circuit switching matrix module is triggered, it switches the insulation monitoring and positioning module to different relay groups according to the preset polling command, so that the insulation monitoring and positioning module can connect with different field circuit signals and send test current to the corresponding field circuit and receive the current signal collected by the current transformer, until the fault circuit is located or the polling command is completed.

[0036] Among them, the preset polling command is to switch the number of relay groups and the switching time interval.

[0037] If the location of the faulty circuit is not located after the polling command is executed, the polling ends and a manual assistance command is issued, and the insulation monitoring and locating device resumes monitoring the insulation resistance value of the busbar to ground.

[0038] The insulation monitoring and positioning module determines that there is a fault in the field circuit based on the received current signal, issues an alarm signal, and transmits the current circuit fault information to the cloud platform.

[0039] Further steps could include active inspection: the multi-circuit switching matrix module initiates an active polling plan according to a preset schedule. Under the active polling plan, the microprocessor causes the insulation monitoring and positioning module to switch between different relay groups in turn, enabling the insulation monitoring and positioning module to connect with different field circuit signals, and sending test current to the current transformer set in the corresponding field circuit and receiving the current signal collected by the current transformer, until the faulty circuit is located or the active polling plan is completed.

[0040] The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but this does not limit the scope of the invention. Those skilled in the art can implement the present invention in various modifications without departing from its scope and spirit; for example, a feature of one embodiment can be used in another embodiment to obtain yet another embodiment. Any modifications, equivalent substitutions, and improvements made within the scope of the present invention should be within the scope of the present invention.

Claims

1. An insulation monitoring and positioning device for offshore power platforms, comprising: Insulation monitoring and positioning module, comprising: The data acquisition unit monitors and obtains the ground insulation resistance value of the power platform busbar; An insulation detection and fault location unit, including a microprocessor, is used to send a test current to the field circuit to locate the faulty circuit when the insulation resistance value is lower than an alarm value; and The data transmission unit uploads the received insulation resistance and current signals, as well as the operating data of the insulation monitoring and positioning module, to the remote platform. Its features also include: The multi-loop switching matrix module is electrically connected to the insulation monitoring and positioning module. The multi-circuit switching matrix module includes 6-12 relay groups; each relay group connects to 12 field circuits, and each field circuit is equipped with a current transformer. When the insulation monitoring and positioning module is switched to different relay groups, it can achieve signal communication with different field circuits, send test current to the corresponding field circuits, and receive current signals collected by the current transformer.

2. The apparatus according to claim 1, characterized in that: The multiple relay groups are packaged into one unit to form the multi-loop switching matrix module.

3. The apparatus according to claim 1, characterized in that: The data acquisition unit, data transmission unit, and insulation detection and fault location unit are packaged together to form the insulation monitoring and location module.

4. The apparatus according to claim 1, characterized in that: The insulation monitoring and positioning module also includes an alarm unit, which is used to issue an alarm signal when the insulation resistance value is lower than the warning value.

5. The apparatus according to claim 1, characterized in that: The insulation monitoring and positioning module also includes a display unit for displaying one or more of the various parameter settings of the insulation monitoring and positioning module, the received signal values, and alarm information.

6. An insulation monitoring system for offshore power platforms, comprising: Current transformers installed in the field circuits of offshore power platforms, with one current transformer corresponding to each field circuit; Any one of the insulation monitoring and positioning devices according to claims 1-5 is electrically connected to the plurality of current transformers; The cloud platform is communicatively connected to the insulation monitoring and positioning device, and receives its operating status data, insulation resistance value and current signal from the insulation monitoring and positioning device, and qualitatively and quantitatively analyzes the insulation level and insulation changes of the electrical equipment in operation.

7. An insulation monitoring and positioning device for offshore power platforms, comprising: The insulation monitoring and location module includes a data acquisition unit, an insulation detection and fault location unit, and a data transmission unit, all packaged together; wherein: The data acquisition unit is used to monitor and obtain the ground insulation resistance value of the power platform busbar; An insulation detection and fault location unit, including a microprocessor, is used to send a test current to the field circuit to locate the faulty circuit when the insulation resistance value is lower than the alarm value; The data transmission unit will upload the received insulation resistance and current signals, as well as the operating data of the insulation monitoring and positioning module, to the remote platform. Its features also include: The multi-circuit switching matrix module includes multiple relay groups packaged as one unit; it is electrically connected to the insulation monitoring and positioning module; the multi-circuit switching matrix module includes 6-12 relay groups; each relay group is connected to 12 field circuits, and each field circuit is equipped with a current transformer; when the insulation monitoring and positioning module switches to connect to different relay groups, it enables the insulation monitoring and positioning module to be signal-connected to different field circuits and to send test current to the corresponding field circuits and receive current signals collected by the current transformers.

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