CN205103345U - Monitoring system of looped netowrk cabinet - Google Patents

Abstract

The utility model discloses a monitoring system of a ring network cabinet. The monitoring system includes transmission cables connected between different ring network cabinets, and also includes a current signal collector, a temperature sensor and an information monitoring device; wherein, the current signal collector is connected to the transmission cable; the temperature sensor is set at The transmission cable is connected to the current signal collector; the information monitoring device is respectively connected to the current signal collector and the temperature sensor, and the information monitoring device is used to generate current and temperature monitoring results. The utility model solves the technical problems of low signal acquisition accuracy and inaccurate monitoring of the monitoring system of the ring network cabinet in the related art.

Description

Monitoring system of ring main unit

technical field

The utility model relates to the field of electric power, in particular to a monitoring system of a ring network cabinet.

Background technique

Ring main unit has a wide range of applications in the field of power supply, and has played a very important role in the construction of urban power supply network. At present, there are no mature products for the comprehensive intelligent monitoring of ring network cabinets at home and abroad. The fault indicator used, the sensor cannot measure the current, and the fault judgment accuracy is low, the error is large, and the temperature indicator only detects the ambient temperature inside the cabinet. In the related art, the monitoring system of the ring network cabinet has low signal acquisition accuracy and inaccurate monitoring.

For the above problems, no effective solution has been proposed yet.

Utility model content

The embodiment of the utility model provides a monitoring system of the ring main unit, so as to at least solve the technical problems of low signal acquisition accuracy and inaccurate monitoring of the monitoring system of the ring main unit in the related art.

According to an aspect of an embodiment of the present invention, a monitoring system of a ring network cabinet is provided, which includes transmission cables connected between different ring network cabinets, and also includes a current signal collector, a temperature measuring sensor, and an information monitoring system. device; wherein, the current signal collector is connected to the transmission cable; the temperature sensor is arranged on the transmission cable and connected to the current signal collector; the information monitoring device is connected to the current signal collector and the temperature sensor respectively, and the information monitoring The device is used to generate the monitoring results of current and temperature.

Further, the current signal collector is a current transformer.

Further, the current transformer is also used to supply power to the ring main unit.

Further, it also includes: a display device for displaying the monitoring results.

Further, the display device is a liquid crystal display.

Further, the information monitoring device is also used to generate an alarm signal according to the monitoring result.

Further, it also includes: an alarm device for alarming according to the alarm signal.

Further, the alarm signal is an audio signal, and the alarm device is a speaker for playing the audio signal; or, the alarm signal is a light signal, and the alarm device is a light alarm for displaying the light signal.

Further, it also includes: a communication device for sending monitoring results.

Further, it also includes: a host computer for receiving the monitoring result sent by the communication device.

Further, it also includes: a sulfur hexafluoride gas monitoring device connected to the transmission cable.

In the embodiment of the present utility model, the monitoring system of the ring network cabinet is adopted, and the monitoring system includes: a transmission cable connected with the ring network cabinet for transmitting current; a current signal collector connected with the transmission cable, which can be used for detecting current current value, and generate fault information indicating that the transmission cable is faulty according to the current value; the temperature measuring sensor is arranged on the transmission cable and connected with the current signal collector, which can be used to detect the temperature of the transmission cable; the information monitoring device is connected with the The current signal collector is connected to the temperature sensor, which can be used to generate monitoring results based on the fault information and the temperature of the transmission cable, thereby solving the technical problems of low signal acquisition accuracy and inaccurate monitoring of the monitoring system of the ring network cabinet in the related technology. In this way, the purpose of realizing both current measurement and fault current detection can be achieved, and the technical effect of temperature monitoring and alarm integration can be realized by installing the temperature sensor at the cable head with the highest failure rate.

Description of drawings

The drawings described here are used to provide a further understanding of the utility model and constitute a part of the application. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 is a schematic structural diagram of a monitoring system of a ring main unit according to an embodiment of the present invention.

Wherein, the reference signs are as follows:

10. Ring network cabinet; 12. Transmission cable; 14. Current signal collector; 16. Temperature sensor; 18. Information monitoring device.

detailed description

In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the utility model. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

It should be noted that the terms "first" and "second" in the specification and claims of the present utility model and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific order or sequence . It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

The utility model provides a structural schematic diagram of a monitoring system of a ring network cabinet 10, as shown in Figure 1, the monitoring system includes transmission cables 12 connected between different ring network cabinets 10, and also includes a current signal collector 14. Temperature measuring sensor 16 and information monitoring device 18; wherein, current signal collector 14 is connected with transmission cable 12; temperature measuring sensor 16 is arranged on transmission cable 12 and is connected with current signal collector 14; information monitoring device 18 is respectively connected with the current signal collector 14 and the temperature sensor 16, and the information monitoring device 18 is used to generate the monitoring results of current and temperature.

In the above monitoring system, the transmission cable 12 can be used to transmit current; the current signal collector 14 is connected to the transmission cable 12, can be used to detect the current value of the current, and generate fault information indicating that the transmission cable 12 fails according to the current value; The temperature sensor 16 can be used to detect the temperature of the transmission cable 12; the information monitoring device 18 is connected with the current signal collector 14 and the temperature sensor 16 respectively, and can be used to generate monitoring results according to the fault information and the temperature of the transmission cable 12, thereby solving the problem of In the related art, the monitoring system of the ring main unit 10 has low signal acquisition accuracy and inaccurate monitoring technical problems, so as to achieve the purpose of realizing both current measurement and fault current detection, and can also be installed by installing the temperature sensor 16 At the position of the cable head with the highest failure rate, the technical effect of temperature monitoring and alarm integration is realized.

Specifically, the above-mentioned temperature measuring sensor 16 can be arranged on the transmission cable 12, for example, the temperature measuring sensor 16 can be installed at the cable head position of the transmission cable 12 with the highest failure rate to detect the temperature of the transmission cable 12, while in the prior art Only the ambient temperature inside the ring network cabinet 10 is detected, and the temperature monitoring is not performed on the cable head part which is the main fault point of the ring network cabinet 10 .

Optionally, in this embodiment, the current signal collector 14 is a current transformer.

Specifically, a current transformer can be used to connect to the transmission cable 12 to detect the current value of the current, and generate fault information indicating that the transmission cable 12 fails according to the above current value. For example, the current transformer can be a card-type current transformer. It should be noted that, in this embodiment, a current transformer is used instead of a traditional sensor. In addition, a wire can also be used instead of an optical fiber for transmission, so that the fault judgment is more accurate and reliable.

Optionally, in this embodiment, the current transformer is also used to supply power to the ring main unit 10 .

Specifically, the current transformer is also used to supply power to the ring network cabinet 10. At this time, the current transformer is used as a power supply to supply power to the current transformer for the passive ring network cabinet 10, so as to solve the problem that the monitor does not have a built-in battery. Next, it can be powered by a current transformer, which solves the problem that the 10-panel meter of the ring main unit is limited by the battery life.

Optionally, in this embodiment, the monitoring system of the ring main unit 10 further includes a display device for displaying the monitoring results.

Specifically, the monitoring system of the ring main unit 10 further includes a display device, which displays the detection result after the information monitoring device 18 generates the detection result according to the fault information and the temperature of the transmission cable 12 .

Optionally, in this embodiment, the display device is a liquid crystal display (LCD, LiquidCrystalDisplay).

Optionally, in this embodiment, the information monitoring device 18 is also configured to generate an alarm signal according to the monitoring result.

Optionally, in this embodiment, the monitoring system of the ring main unit 10 further includes an alarm device, and the alarm device is configured to issue an alarm according to the alarm signal.

Specifically, the monitoring system of the ring network cabinet 10 also includes an alarm device, which is used for alarming according to the alarm signal, for example, after the temperature sensor 16 changes the temperature into an electrical signal, it is sent to the single-chip computer for calculation through analog-to-digital conversion, The temperature is displayed on the LCD display, and the monitoring system of the above-mentioned ring network cabinet 10 monitors the temperature of the cable head online. When the temperature is abnormal, the alarm device gives an alarm. Further, the monitoring system of the ring network cabinet 10 also has an event recording function (SOE, Sequenceofevent), record fault current generation time and peak value, short-circuit ground fault local alarm, cable head temperature change data record, local alarm when temperature exceeds the limit, and realize the integration of temperature monitoring and alarm.

It should be noted that, the monitoring function of the monitoring system of the ring network cabinet 10 can be centralized and on-site indicated through the LCD display: on the panel of the switch cabinet, the mechanical indication, fault point, cable head temperature, fault Centralized on-site instructions such as current, realize passive maintenance to active management of ring main unit 10 equipment, and reduce management costs.

Optionally, in this embodiment, the alarm signal is an audio signal, and the alarm device is a speaker for playing the audio signal; or, the alarm signal is a light signal, and the alarm device is a light alarm for displaying the light signal.

Specifically, the above-mentioned warning signal can be an audio signal, and the warning device at this time is a speaker for playing the audio signal; or, the warning signal can be a light signal, and the next time the warning device is a light alarm device for displaying the light signal.

Optionally, in this embodiment, the monitoring system of the ring main unit 10 further includes: a communication device for sending monitoring results.

Specifically, the monitoring system of the ring network cabinet 10 also includes a communication device, which is used to send the monitoring results. It should be noted that it can communicate with the on-site data transmission unit DTU and DataTransferUnit through wired or wireless methods, and transmit the fault information through the DTU Transmission to the remote place or using a dedicated transponder to communicate with the remote place through the general packet wireless service technology GPRS, GeneralPacketRadioService, which solves the problem that in the prior art, it is necessary to combine multiple sets of products to realize the monitoring of the ring main unit 10, current indication, and fault alarm , temperature indication and other states are completed by their respective sets of sensors and instruments, and various test results cannot be uploaded to the data acquisition and monitoring system (SCADA, Supervisory Control And Data Acquisition) through the grid channel.

It can be seen from this that, aiming at the problem of low accuracy and inaccurate monitoring of the monitoring system of the ring network cabinet 10 in the related art, the utility model proposes a monitoring system of the ring network cabinet 10, through the current signal collector 14, wherein the current The signal collector 14 is connected with the transmission cable 12, detects the current value of the current, and generates fault information indicating that the transmission cable 12 fails according to the current value; the temperature measurement sensor 16 is arranged on the transmission cable 12 and connected with the current signal collector 14 , used to detect the temperature of the transmission cable 12; the information monitoring device 18 is connected with the current signal collector 14 and the temperature sensor 16 respectively, and is used to generate monitoring results according to the fault information and the temperature of the transmission cable 12, thereby achieving both Current measurement can also achieve the purpose of fault current detection, and the integration of temperature monitoring and alarm can be realized by installing the temperature sensor 16 at the cable head with the highest failure rate. To be more precise, if the temperature sensor 16 and the switch auxiliary contact wiring are installed at the same time, the current indication, fault alarm, and temperature indication can be displayed through the LCD. Further, the monitoring system of the ring main unit 10 also provides a communication module, each The monitoring results can be uploaded to the SCADA system through the grid channel, which improves the automation level of the ring main unit 10 as a whole.

Optionally, in this embodiment, a host computer configured to receive the monitoring result sent by the communication device is also included. In the actual monitoring process, multiple communication devices are respectively connected between different ring network cabinets 10, and one or several ring network cabinets 10 are located in the same power distribution room. The upper computer is set to receive the monitoring results sent by each communication device, and the current and temperature in each power distribution room can be monitored at the upper computer at the same time, making the monitoring process more convenient. The upper computer is usually installed in the communication master station, and the communication devices in each power distribution room send the monitoring results to the upper computer in a wireless or wired manner.

Optionally, in this embodiment, a sulfur hexafluoride gas monitoring device is further included, and the sulfur hexafluoride gas monitoring device is connected to the transmission cable. The sulfur hexafluoride gas monitoring device can monitor the leakage of sulfur hexafluoride gas in real time, so as to improve safety.

The following is a detailed description of the monitoring method using the above-mentioned ring network cabinet monitoring system. The method includes the following steps:

Step S32, detecting the current value of the current transmitted through the transmission cable, wherein the transmission cable is connected to the ring network cabinet;

Step S34, generating fault information indicating that the transmission cable is faulty according to the current value of the current;

Step S36, detecting the temperature of the transmission cable;

In the above step S36 of the present application, the temperature of the transmission cable can be obtained by detecting the temperature of the cable head position of the transmission cable with the highest failure rate, while in the prior art, only the ambient temperature in the cabinet of the ring network cabinet is detected. The cable head part of the main fault point of the cabinet is not monitored for temperature.

Step S38, generating a monitoring result according to the fault information and the temperature of the transmission cable.

In the monitoring method, the current value of the current transmitted through the transmission cable is obtained through detection, wherein the transmission cable is connected to the ring network cabinet; the fault information indicating that the transmission cable fails is generated according to the current value of the current; the temperature of the transmission cable is detected; according to the fault The temperature of the information and the transmission cable generates monitoring results, which solves the technical problems of low signal acquisition accuracy and inaccurate monitoring of the monitoring system of the ring main unit in the related technology. On the one hand, the current signal is collected by the current signal collector, which can realize current Measurement can also realize fault current detection; on the other hand, it can also realize the integration of temperature monitoring and alarm by installing the temperature sensor at the cable head with the highest failure rate.

It can be seen that, aiming at the problems of low signal acquisition accuracy and inaccurate monitoring of the monitoring system of the ring network cabinet in the related art, the utility model proposes a monitoring method of the ring network cabinet, and obtains the current value of the current transmitted through the transmission cable through detection , wherein, the transmission cable is connected with the ring network cabinet; the fault information indicating the failure of the transmission cable is generated according to the current value of the current; the temperature of the transmission cable is detected; the monitoring result is generated according to the fault information and the temperature of the transmission cable, which solves the problem of the ring network in the related technology The cabinet monitoring system has low signal acquisition accuracy and inaccurate monitoring technical problems, so as to achieve the purpose of not only realizing current measurement but also fault current detection, and installing the temperature sensor on the cable with the highest failure rate The position of the head realizes the integration of temperature monitoring and alarm. Among them, the current transformer is used as the signal acquisition unit, and the alarm is more accurate. LCD display, and further, the monitoring system of the ring main unit also provides a communication module, and various monitoring results can be uploaded to the SCADA system through the grid channel, which improves the automation level of the ring main unit as a whole.

The serial numbers of the above-mentioned embodiments of the utility model are only for description, and do not represent the advantages and disadvantages of the embodiments.

In the above-mentioned embodiments of the present invention, the descriptions of each embodiment have their own emphases, and for the parts not described in detail in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed technical content can be realized in other ways. Wherein, the device embodiments described above are only illustrative. For example, the division of units can be a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into Another system, or some feature may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of units or modules may be in electrical or other forms.

A unit described as a separate component may or may not be physically separated, and a component shown as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed over multiple units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

If the integrated unit is realized in the form of a software function 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 utility model 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 Among them, several instructions are included to make a computer device (which may be a personal computer, server or network device, etc.) execute all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), mobile hard disk, magnetic disk or optical disk.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these improvements and Retouching should also be regarded as the scope of protection of the present utility model.

Claims (11)

1. a monitoring system of ring network cabinet, is characterized in that, comprises the transmission cable (12) that is connected between different ring network cabinets (10), and also comprises current signal collector (14), temperature sensor ( 16) and an information monitoring device (18); wherein, the current signal collector (14) is connected to the transmission cable (12); the temperature sensor (16) is arranged on the transmission cable (12) , and be connected with the current signal collector (14); the information monitoring device (18) is connected with the current signal collector (14) and the temperature sensor (16) respectively, and the information monitoring Means (18) are used to generate current and temperature monitoring results. 2. The monitoring system according to claim 1, characterized in that, the current signal collector (14) is a current transformer. 3. The monitoring system according to claim 2, characterized in that the current transformer is also used to supply power to the ring main unit (10). 4. The monitoring system according to claim 1, further comprising: a display device for displaying the monitoring result. 5. The monitoring system according to claim 4, wherein the display device is a liquid crystal display. 6. The monitoring system according to claim 1, characterized in that the information monitoring device (18) is further configured to generate an alarm signal according to the monitoring result. 7. The monitoring system according to claim 6, further comprising: an alarm device configured to issue an alarm according to the alarm signal. 8. The monitoring system according to claim 7, wherein the warning signal is an audio signal, and the warning device is a loudspeaker for playing the audio signal; or, the warning signal is a light signal, the The warning device is a light alarm device for displaying the light signal. 9. The monitoring system according to claim 1, further comprising: a communication device for sending the monitoring result. 10. The monitoring system according to claim 9, further comprising: a host computer for receiving the monitoring result sent by the communication device. 11. The monitoring system according to claim 1, further comprising: a sulfur hexafluoride gas monitoring device connected to the transmission cable (12).