Medium-voltage switch cabinet online monitoring system and medium-voltage switch cabinet

Abstract

The utility model discloses an on-line monitoring system for a medium voltage switch cabinet and the medium voltage switch cabinet, and relates to the technical field of switch cabinets, the on-line monitoring system for the medium voltage switch cabinet comprises a digital signal processing module, a sensor module, a control module, an alarm module and a data transmission module, each sensor is used for detecting data in the switch cabinet and feeding back the data to the digital signal processing module; the control module is bidirectionally connected with the digital signal processing module to transmit and receive electric signals to the digital signal processing module; the alarm module is electrically connected with the control module to receive an electric signal of the alarm module; the data transmission module is electrically connected with the digital signal processing module so as to transmit parameters of the digital signal processing module to the mobile terminal; according to the scheme, the multiple sensors are used for detecting, feeding back and analyzing the switch cabinet so as to judge whether the interior of the switch cabinet is normal or not, early warning is conducted through the alarm module so as to remind an operator to conduct processing in time, and normal operation of the medium-voltage switch cabinet is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of switch cabinets, in particular to an online monitoring system for a medium-voltage switch cabinet and a medium-voltage switch cabinet. Background Art

[0002] As an important equipment for line opening and closing, power equipment control and protection in the power system, medium-voltage switchgear has been widely used in the power distribution link. Its safe operation will directly affect the quality and reliability of power supply to users. According to statistics, in recent years, among the common types of faults in medium-low voltage and medium-voltage switchgear in my country, the failure rates are at the top, such as insulation damage, mechanical failure, temperature rise failure, misoperation and arc failure. Among them, because the medium-voltage switchgear has been in a place with high humidity and a relatively harsh environment for a long time, it has high humidity in the cabinet, insulation aging and loose contacts, which can easily lead to corona discharge, cable contacts and busbar temperature rise, which may cause power outages or even fires, endangering the safe operation of the entire distribution network and causing huge economic losses. How to timely warn and prevent the failure of the medium-voltage switchgear needs to be solved urgently. Utility Model Content

[0003] The main purpose of the utility model is to provide a medium voltage switch cabinet online monitoring system and a medium voltage switch cabinet, aiming to monitor the operating status in the medium voltage switch cabinet so as to give a timely warning when an abnormality occurs.

[0004] To achieve the above purpose, the medium voltage switch cabinet online monitoring system proposed by the utility model includes:

[0005] Digital signal processing module;

[0006] A sensor module, wherein the sensor module includes a plurality of sensors, each of which is used to detect data in the switch cabinet and feed back the data to the digital signal processing module;

[0007] A control module, the control module is bidirectionally connected to the digital signal processing module to transmit and receive electric signals to the digital signal processing module;

[0008] an alarm module, the alarm module being electrically connected to the control module to receive an electrical signal from the alarm module;

[0009] A data transmission module, wherein the data transmission module is electrically connected to the digital signal processing module to transmit the parameters of the digital signal processing module to the mobile terminal.

[0010] In one embodiment, the sensor module includes a temperature sensor, a current sensor, a voltage sensor, and a smoke sensor.

[0011] In one embodiment, the digital signal processing module includes a processor, a display screen, and operation buttons, and the display screen and the operation buttons are electrically connected to the processor.

[0012] In one embodiment, the digital signal processing module further includes a comparator, and the comparator is used to compare the detection data of the sensor module with stored preset data.

[0013] In one embodiment, the alarm module includes a warning light and a warning horn.

[0014] In one embodiment, the medium voltage switch cabinet online monitoring system further includes an exhaust component and a heating component, wherein the exhaust component and the heating component are disposed in the switch cabinet and are electrically connected to the digital processing module and the control module.

[0015] In one embodiment, the data transmission module includes a local data transmission system and a remote data transmission system.

[0016] In one implementation, the communication interface of the local data transmission system includes a parallel interface, a serial interface and a PCI interface.

[0017] In one embodiment, the communication interface of the remote data transmission system includes an Ethernet interface, a wireless interface, a serial communication interface and a fiber optic interface.

[0018] The utility model further provides a medium-voltage switch cabinet, the medium-voltage switch cabinet comprising the above-mentioned medium-voltage switch cabinet online monitoring system, the medium-voltage switch cabinet online monitoring system comprising:

[0019] Digital signal processing module;

[0020] A sensor module, wherein the sensor module includes a plurality of sensors, each of which is used to detect data in the switch cabinet and feed back the data to the digital signal processing module;

[0021] A control module, the control module is bidirectionally connected to the digital signal processing module to transmit and receive electric signals to the digital signal processing module;

[0022] an alarm module, the alarm module being electrically connected to the control module to receive an electrical signal from the alarm module;

[0023] A data transmission module, wherein the data transmission module is electrically connected to the digital signal processing module to transmit the parameters of the digital signal processing module to the mobile terminal.

[0024] The technical solution of the utility model detects various data in the switch cabinet through multiple sensors of the sensor module and feeds them back to the digital signal processing module for analysis to determine whether the data in the switch cabinet is normal, so as to facilitate the operator to determine whether the switch cabinet is in a normal working state, and to set an alarm module to issue an early warning when an abnormality occurs in the switch cabinet to remind the operator to deal with the abnormal position in the switch cabinet in time, avoid further expansion of the abnormal situation to cause greater safety hazards and losses, and ensure the normal operation of the medium-voltage switch cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0026] Figure 1 The utility model provides a schematic structural diagram of an embodiment of a medium voltage switch cabinet online monitoring system.

[0027] Description of Figure Numbers:

[0028] 1000. Medium voltage switchgear online monitoring system; 10. Digital signal processing module; 20. Sensor module; 30. Control module; 40. Alarm module; 50. Data transmission module.

[0029] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0033] As an important equipment for line opening and closing, power equipment control and protection in the power system, medium-voltage switchgear has been widely used in the power distribution link. Its safe operation will directly affect the quality and reliability of power supply to users. According to statistics, in recent years, among the common types of faults in medium-low voltage and medium-voltage switchgear in my country, the failure rates are at the top, such as insulation damage, mechanical failure, temperature rise failure, misoperation and arc failure. Among them, because the medium-voltage switchgear has been in a place with high humidity and a relatively harsh environment for a long time, it has high humidity in the cabinet, insulation aging and loose contacts, which can easily lead to corona discharge, cable contacts and busbar temperature rise, which may cause power outages or even fires, endangering the safe operation of the entire distribution network and causing huge economic losses. How to timely warn and prevent the failure of the medium-voltage switchgear needs to be solved urgently.

[0034] To solve the above problems, the present solution proposes an online monitoring system 1000 for a medium-voltage switchgear, comprising a digital signal processing module 10, a sensor module 20, a control module 30, an alarm module 40 and a data transmission module 50. The sensor module 20 comprises a plurality of sensors, each of which is used to detect data in the switchgear and feed it back to the digital signal processing module 10; the control module 30 is bidirectionally connected to the digital signal processing module 10 to receive and send electrical signals to the digital signal processing module 10; the alarm module 40 is electrically connected to the control module 30 to receive electrical signals from the alarm module 40; and the data transmission module 50 is electrically connected to the digital signal processing module 10 to transmit the parameters of the digital signal processing module 10 to the mobile terminal.

[0035] The technical solution of the present invention detects various data in the switch cabinet through multiple sensors of the sensor module 20 and feeds them back to the digital signal processing module 10 for analysis to determine whether the data in the switch cabinet is normal, so as to facilitate the operator to determine whether the switch cabinet is in a normal working state, and by setting the alarm module 40, an early warning is issued when an abnormality occurs in the switch cabinet to remind the operator to deal with the abnormal position in the switch cabinet in time, avoid further expansion of the abnormal situation to cause greater safety hazards and losses, and ensure the normal operation of the medium voltage switch cabinet.

[0036] In an optional embodiment, in order to facilitate a more comprehensive detection of the working conditions in the switch cabinet, the sensor module 20 includes a temperature sensor, a current sensor, a voltage sensor and a smoke sensor. Optionally, the current sensor and the voltage sensor can be set at the electrical connection parts in the switch cabinet, such as the switch cabinet moving contact, the static contact, the busbar overlap, the cable connection point, etc. The current and voltage changes at these positions are more obvious. Installing sensors can more accurately monitor the circuit state, so that the abnormal state of the current and voltage in the switch cabinet can be discovered in time. Or the temperature sensor is used to detect the temperature change at the cable connection position to detect whether the cable is short-circuited, so as to prevent the cable short-circuit from causing the cable in the switch cabinet to burn and cause a fire. In addition, a humidity sensor, a smoke sensor and a gas sensor can also be set in the switch cabinet to detect the humidity and some harmful gases in the switch cabinet to determine the working conditions in the switch cabinet. A humidity sensor is set to detect the humidity in the switch cabinet to prevent the internal electrical equipment from malfunctioning or corroding due to excessive humidity in the switch cabinet for a long time. Smoke sensors and gas sensors are set up to detect cable short circuits or fire hazards in the switch cabinet. The gas sensor can be a carbon monoxide sensor or a sulfur hexafluoride gas sensor to detect harmful gases in the switch cabinet. The operator is warned in time to take precautions to avoid the operator accidentally inhaling harmful gases when opening the medium-voltage switch cabinet, thereby protecting the operator's safety.

[0037] Optionally, the humidity of the medium-voltage switch cabinet is controlled in time and the harmful gas in the medium-voltage switch cabinet is discharged. The medium-voltage switch cabinet online monitoring system 1000 also includes an exhaust component and a heating component, which are arranged in the switch cabinet and are electrically connected to the digital processing module and the control module 30. An exhaust fan can be arranged on the side wall or top wall of the switch cabinet to increase the gas exchange between the medium-voltage switch cabinet and the outside world, and to discharge the harmful gas inside in time. In addition, the exhaust fan can also take out the heat by wind when the temperature inside the medium-voltage switch cabinet is too high, so as to achieve the effect of heat dissipation and cooling. In addition, a protective net can be arranged on the outside of the exhaust fan to prevent mosquitoes, dust or other impurities from entering the medium-voltage switch cabinet. When the humidity sensor detects that the humidity in the medium-voltage switch cabinet is too high, the digital signal processing module 10 sends a signal to the control module 30, and the control module 30 controls the heating component to heat and dehumidify the medium-voltage switch cabinet to ensure that the basic temperature environment and humidity environment in the medium-voltage switch cabinet remain normal, and reduce the possibility of failure or abnormality of the medium-voltage switch cabinet due to the external environment.

[0038] In an optional embodiment, in order to facilitate the operator to observe and process the monitoring data of the medium-voltage switchgear online monitoring system 1000, the digital signal processing module 10 includes a processor, a display screen and an operation button, and the display screen and the operation button are electrically connected to the processor. The processor receives and processes the signals sent by each module of the medium-voltage switchgear online monitoring system 1000, and displays them on the display screen in the form of digital signals for the operator to observe, and processes them accordingly according to the display data of the display screen, and inputs instructions through the operation buttons so that the control module 30 performs control processing accordingly.

[0039] In an optional embodiment, in order to facilitate the medium voltage switchgear online monitoring system 1000 to give early warning of abnormal conditions, the digital signal processing module 10 also includes a comparator, which is used to compare the detection data of the sensor module 20 with the stored preset data. By inputting preset warning values ​​of various parameters into the digital signal processing module 10, such as current, voltage, temperature, humidity or gas concentration, the detection data of the sensor module 20 is compared with the preset data by the comparator to determine whether it exceeds the preset value. When the detection value exceeds the preset value, the comparator sends a signal to the processor, and the processor sends an electrical signal to the control module 30 to control the alarm module 40 to give an alarm or control the electrical components of the medium voltage switchgear to take corresponding measures.

[0040] Optionally, the alarm module 40 of the medium-voltage switchgear online monitoring system 1000 includes a warning light and a warning horn. When an abnormality occurs in the medium-voltage switchgear, that is, when the detection data of the sensor module 20 exceeds a preset value, the control module 30 controls the alarm module 40 to give an alarm, and the alarm can be given visually and audibly, such as by lighting up a warning light with a striking color or flashing alternately to remind the operator that the medium-voltage switchgear has an abnormality, or by setting a warning horn to emit a prompt sound to remind the operator. The warning light and the warning horn can be set on the top of the medium-voltage switchgear to obtain a larger warning range, so that the operator can see the warning light or hear the warning horn at a longer distance, so that the operator can handle it in time.

[0041] In an optional embodiment, in order to facilitate the data transmission of the medium-voltage switchgear online monitoring system 1000, the data transmission module 50 includes a local data transmission system and a remote data transmission system. The local data transmission system realizes the data transmission of the medium-voltage switchgear online monitoring system 1000 inside the medium-voltage switchgear and between control terminals, and the remote data transmission module 50 is used to realize the data transmission between the medium-voltage switchgear and the user terminal, so that the operator can remotely understand the situation inside the medium-voltage switchgear through the mobile terminal and operate remotely. Optionally, the local data transmission system can realize data transmission through one of the optical fiber communication network, the micro-power wireless communication network and the low-voltage power carrier communication network, and the remote data transmission system can realize data transmission through one of the optical fiber communication network, the wireless network and the wireless public network. The communication interface of the local data transmission system includes a parallel interface, a serial interface and a PCI interface. The communication interface of the remote data transmission system includes an Ethernet interface, a wireless interface, a serial communication interface and an optical fiber interface.

[0042] The utility model also proposes a medium-voltage switchgear, which includes a medium-voltage switchgear online monitoring system 1000. The specific structure of the medium-voltage switchgear online monitoring system 1000 refers to the above-mentioned embodiment. Since the medium-voltage switchgear adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here one by one.

[0043] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A medium voltage switch cabinet online monitoring system, characterized in that: include: A digital signal processing module, the digital signal processing module comprising a processor, a display screen and operation buttons, the display screen and the operation buttons being electrically connected to the processor; A sensor module, wherein the sensor module includes a temperature sensor, a current sensor, a voltage sensor and a smoke sensor, each of which is used to detect data in the switch cabinet and feed back the data to the digital signal processing module; A control module, the control module is bidirectionally connected to the digital signal processing module to transmit and receive electric signals to the digital signal processing module; an alarm module, the alarm module being electrically connected to the control module to receive an electrical signal from the alarm module; A data transmission module, wherein the data transmission module is electrically connected to the digital signal processing module to transmit the parameters of the digital signal processing module to the mobile terminal.

2. The medium voltage switchgear online monitoring system according to claim 1, characterized in that: The digital signal processing module further includes a comparator, which is used to compare the detection data of the sensor module with stored preset data.

3. The medium voltage switchgear online monitoring system according to claim 2, characterized in that: The alarm module includes a warning light and a warning horn.

4. The medium voltage switchgear online monitoring system according to claim 3, characterized in that: The medium voltage switch cabinet online monitoring system also includes an exhaust component and a heating component, which are arranged in the switch cabinet and are electrically connected to the digital signal processing module and the control module.

5. The medium voltage switchgear online monitoring system according to claim 4, characterized in that: The data transmission module includes a local data transmission system and a remote data transmission system.

6. The medium voltage switchgear online monitoring system according to claim 5, characterized in that: The communication interface of the local data transmission system includes a parallel interface, a serial interface and a PCI interface.

7. The medium voltage switchgear online monitoring system according to claim 5, characterized in that: The communication interface of the remote data transmission system includes an Ethernet interface, a wireless interface, a serial communication interface and an optical fiber interface.

8. A medium voltage switch cabinet, characterized in that: It comprises the medium voltage switchgear online monitoring system as claimed in any one of claims 1 to 7.

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