High voltage shore power monitoring system

Abstract

The application provides a high-voltage shore power monitoring system, comprising: a high-frequency current sensor, which is used for detecting the partial discharge current of a high-voltage shore power cable; a monitoring display device; and a control device, which is electrically connected to the high-frequency current sensor and the monitoring display device respectively and is used for controlling the monitoring display device to display a partial discharge alarm information when the partial discharge current is greater than a set threshold. The high-voltage shore power monitoring system provided by the application is configured with the high-frequency current sensor, and the monitoring display device is controlled to display the partial discharge alarm information when the partial discharge current detected by the high-frequency current sensor is greater than the set threshold. Thus, the real-time partial discharge monitoring of the high-voltage shore power cable is realized, and the monitoring display device displays the partial discharge alarm information to the staff when the partial discharge current of the high-voltage shore power cable is abnormal. Therefore, the monitoring comprehensiveness of the high-voltage shore power monitoring system and the operation safety performance of the high-voltage shore power system are improved.

Description

Technical Field

[0001] This utility model generally relates to the field of marine technology, and specifically to a high-voltage shore power monitoring system. Background Technology

[0002] Ships are typically equipped with high-voltage shore power systems that connect to shore power systems to provide power to the vessel. These high-voltage shore power systems usually include monitoring systems that can monitor parameters such as charging voltage and power in real time. However, existing monitoring systems lack the capability to detect partial discharge in shore power cables, preventing crew members from promptly identifying any partial discharge issues and increasing the operational risks associated with high-voltage shore power systems. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a high-voltage shore power monitoring system.

[0004] This application provides a high-voltage shore power monitoring system, including: High-frequency current sensor is used to detect the partial discharge current of high-voltage shore power cables. Monitoring and display devices; The control device is electrically connected to the high-frequency current sensor and the monitoring and display device. The control device is used to control the monitoring and display device to display partial discharge alarm information when the partial discharge current is greater than the set threshold.

[0005] Furthermore, the high-frequency current sensor includes a sensor body and a support structure. The sensor body has a sleeve hole and is sleeved on the outer periphery of the grounding wire of the high-voltage shore power cable through the sleeve hole. The sensor body is set on the support structure, and the support structure is installed on the mounting foundation. The support structure has two wire bundle tubes, which are located on both sides of the sensor body along the axial direction of the sleeve hole, and the wire bundle tubes are arranged opposite to the middle of the sleeve hole.

[0006] Furthermore, the outer periphery of the sensor body is provided with multiple connecting parts arranged circumferentially, and the support structure can be selectively installed on one of the connecting parts.

[0007] Furthermore, the connecting part includes several threaded connecting holes, and the support structure is fixedly connected to the sensor body by several bolts, wherein the bolts are screwed into the several threaded connecting holes one by one.

[0008] Furthermore, the support structure includes a first support plate, two second support plates, and a mounting plate. The first support plate is located on the outer periphery of the sensor body and is connected to the sensor body. The two second support plates are located on both sides of the sensor body along the axial direction of the sleeve hole, and the ends of the two second support plates are respectively connected to the two ends of the first support plate. Two wire harness tubes are respectively installed at the ends of the two second support plates. The mounting plate is located on the side of the first support plate away from the second support plates. One end of the mounting plate is connected to the first support plate, and the other end is connected to the mounting base.

[0009] The high-voltage shore power monitoring system provided in this application is equipped with a high-frequency current sensor. When the partial discharge current detected by the high-frequency current sensor exceeds a set threshold, the monitoring and display device is controlled to display partial discharge alarm information. This not only enables real-time partial discharge monitoring of high-voltage shore power cables, but also displays partial discharge alarm information to staff through the monitoring and display device when the partial discharge current of the high-voltage shore power cable is abnormal. This improves the monitoring comprehensiveness of the high-voltage shore power monitoring system and the operational safety performance of the high-voltage shore power system. Attached Figure Description

[0010] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a structural block diagram of the high-voltage shore power monitoring system provided in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of a high-frequency current sensor provided in an embodiment of this application. Detailed Implementation

[0011] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0012] Please refer to Figure 1 This application provides a high-voltage shore power monitoring system, including a high-frequency current sensor 10, a monitoring and display device 20, and a control device 30. The high-frequency current sensor 10 and the monitoring and display device 20 are both electrically connected to the control device 30. The high-frequency current sensor 10 is used to detect the partial discharge current generated by the high-voltage shore power cable during partial discharge. The magnitude of the partial discharge current reflects the risk level of insulation failure in the high-voltage shore power cable. The monitoring and display device 20 is used to display partial discharge alarm information, which can alert personnel to the occurrence of partial discharge in the high-voltage shore power cable, facilitating timely troubleshooting of insulation failures. The control device 30 is used to control the monitoring and display device 20 to display the partial discharge alarm information when the partial discharge current exceeds a set threshold.

[0013] In this embodiment, by configuring a high-frequency current sensor 10, and controlling the monitoring and display device 20 to display partial discharge alarm information when the partial discharge current detected by the high-frequency current sensor 10 is greater than a set threshold, not only is real-time partial discharge monitoring of the high-voltage shore power cable realized, but also the partial discharge alarm information is displayed to the staff through the monitoring and display device 20 when the partial discharge current of the high-voltage shore power cable is abnormal, thereby improving the monitoring comprehensiveness of the high-voltage shore power monitoring system and the operational safety performance of the high-voltage shore power system.

[0014] The monitoring and display device 20 can be a display for the ship's monitoring center. It can also display the current partial discharge current data measured by the high-frequency current sensor 10 in real time, facilitating real-time monitoring by staff. The control device 30 can be, but is not limited to, a microcontroller, PLC, or other processor.

[0015] Please refer to Figure 2 In some embodiments of this application, the high-frequency current sensor 10 includes a sensor body 110 and a support structure 120. The sensor body 110 has a sleeve hole 111 and is sleeved on the outer periphery of the grounding wire 200 of the high-voltage shore power cable through the sleeve hole 111. The sensor body 110 is disposed on the support structure 120, and the support structure 120 is mounted on a mounting base. That is, the sensor body 110 is mounted on the mounting base through the support structure 120 to avoid the sensor body 110 moving and affecting the measurement accuracy. The aforementioned mounting base can be, but is not limited to, a high-voltage shore power junction box on a ship, etc. The grounding wire 200 of the high-voltage shore power cable can be, but is not limited to, a braided strip such as tin-plated copper braided tape. After passing through the high-frequency current sensor 10, the grounding wire 200 is connected to the grounding pin in the high-voltage shore power junction box.

[0016] The support structure 120 is provided with two cable bundles 124, which are located on both sides of the sensor body 110 along the axial direction of the sleeve hole 111, and are positioned opposite to the middle of the sleeve hole 111. The cable bundles 124 can constrain the position of the grounding wire 200, ensuring that the portion of the grounding wire 200 passing through the sensor body 110 remains essentially in the middle of the sensor body 110. This ensures the measurement accuracy of the high-frequency current sensor 10 and also prevents contact friction between the grounding wire 200 and the sensor body 110.

[0017] Optionally, the sensor body 110 is annular, and has a split structure including two semi-circular parts. One end of the two parts is rotatably connected by a hinge, and the other end is provided with a latch for fastening. The cable tie tube 124 is also a split structure, including two semi-cylindrical halves, which are screwed together by a screw connector.

[0018] In some embodiments of this application, the support structure 120 includes a first support plate 121, two second support plates 122, and a mounting plate 123. The first support plate 121 is located on the outer periphery of the sensor body 110 and is connected to the sensor body 110. The two second support plates 122 are located on both sides of the sensor body 110 along the axial direction of the sleeve hole 111, and the ends of the two second support plates 122 are respectively connected to the two ends of the first support plate 121. Two wire harness tubes 124 are respectively installed at the ends of the two second support plates 122. The mounting plate 123 is located on the side of the first support plate 121 away from the second support plates 122. One end of the mounting plate 123 is connected to the first support plate 121 and the other end is connected to the mounting base.

[0019] Optionally, one half of the cable tie tube 124 is fixedly connected to the second support plate 122, and the first support plate 121, the two second support plates 122, the mounting plate 123, and the half of the cable tie tube connected to the second support plate 122 are integrally connected.

[0020] In some embodiments of this application, the outer periphery of the sensor body 110 is provided with a plurality of connecting parts arranged circumferentially, and the support structure 120 can be selectively installed on one of the connecting parts. Since there are many components in the high-voltage shore power junction box, its internal installation space is relatively tight. The above arrangement can facilitate the user to adjust the position of the support structure 120 on the sensor body 110, thereby facilitating the staff to assemble the support structure 120 on the sensor body 110.

[0021] Multiple connection parts are distributed on two separate parts of the sensor body 110 and are staggered from the data transmission lines of the sensor body 110.

[0022] Optionally, the connecting part includes a plurality of threaded connecting holes arranged at intervals along the outer periphery of the sensor body 110. The support structure 120 is fixedly connected to the sensor body 110 by a plurality of bolts, wherein the plurality of bolts are screwed one-to-one into the plurality of threaded connecting holes. The first support plate 121 may also be arc-shaped and have a high degree of fit with the outer peripheral surface of the sensor body 110 to facilitate the connection between the first support plate 121 and the sensor body 110.

[0023] It should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., used above to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A high-voltage shore power monitoring system, characterized in that, include: A high-frequency current sensor is used to detect the partial discharge current of a high-voltage shore power cable. The high-frequency current sensor includes a sensor body and a support structure. The sensor body has a sleeve hole and is sleeved on the outer periphery of the grounding wire of the high-voltage shore power cable through the sleeve hole. The sensor body is disposed on the support structure, and the support structure is installed on an installation foundation. The support structure has two wire bundle tubes, which are respectively located on both sides of the sensor body along the axial direction of the sleeve hole, and the wire bundle tubes are disposed opposite to the middle of the sleeve hole. Monitoring and display devices; A control device is electrically connected to the high-frequency current sensor and the monitoring and display device, respectively. The control device is used to control the monitoring and display device to display partial discharge alarm information when the partial discharge current is greater than a set threshold.

2. The high-voltage shore power monitoring system according to claim 1, characterized in that, The outer periphery of the sensor body is provided with multiple connecting parts arranged circumferentially, and the support structure can be selectively installed on one of the connecting parts.

3. The high-voltage shore power monitoring system according to claim 2, characterized in that, The connecting part includes several threaded connecting holes, and the supporting structure is fixedly connected to the sensor body by several bolts, wherein the several bolts are screwed into the several threaded connecting holes one by one.

4. The high-voltage shore power monitoring system according to claim 1, characterized in that, The support structure includes a first support plate, two second support plates, and a mounting plate. The first support plate is located on the outer periphery of the sensor body and is connected to the sensor body. The two second support plates are located on both sides of the sensor body along the axial direction of the sleeve hole, and the ends of the two second support plates are respectively connected to the two ends of the first support plate. The two wire harness tubes are respectively installed at the ends of the two second support plates. The mounting plate is located on the side of the first support plate away from the second support plates. One end of the mounting plate is connected to the first support plate, and the other end is connected to the mounting base.

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