Monitoring system for switch cabinet

Abstract

The invention relates to the technical field of switch cabinet monitoring, and discloses a monitoring system for a switch cabinet, which comprises a control module, a signal acquisition module, a signal processing module, a transmission module, a sensor module and a server. According to the monitoring system for the switch cabinet, operation data, including temperature, current and voltage key parameters, of the switch cabinet can be collected in real time through the monitoring system, an alarm is given once abnormity is found, fault finding time is greatly shortened, loss caused by the fact that faults are not found in time is reduced, and manual inspection is not needed. Operation and maintenance personnel need to be in direct contact with equipment, safety risks such as electric shock and mechanical injury exist, however, the monitoring system reduces the requirement for personnel to enter a dangerous area through remote monitoring, the occurrence probability of safety accidents is reduced, and meanwhile, the situations of missing detection and misjudgment possibly exist due to the fact that manual inspection is limited by factors such as personnel experience and fatigue degree.

Description

Technical Field

[0001] The present invention relates to the technical field of switch cabinet monitoring, and in particular to a monitoring system for a switch cabinet. Background Art

[0002] The switch cabinet is an electrical equipment. The external line of the switch cabinet first enters the main control switch inside the cabinet, and then enters the sub-control switch. Each branch is set according to its needs, such as instruments, automatic control, motor magnetic switches, various AC contactors, etc. Some also have high-voltage and low-voltage switch cabinets, with high-voltage busbars, such as power plants, etc. Some are also equipped with low-frequency load shedding to protect the main equipment.

[0003] The main function of the switchgear is to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and energy conversion in the power system. The components in the switchgear mainly include circuit breakers, disconnectors, load switches, operating mechanisms, mutual inductors and various protective devices. There are many ways to classify switchgear. For example, according to the installation method of the circuit breaker, it can be divided into removable switchgear and fixed switchgear; or according to the different cabinet structures, it can be divided into open switchgear, metal-enclosed switchgear, and metal-enclosed armored switchgear; according to the voltage level, it can be divided into high-voltage switchgear, medium-voltage switchgear and low-voltage switchgear, etc. It is mainly suitable for various occasions such as power plants, substations, petrochemicals, metallurgy and steel rolling, light industry and textiles, factories and mines, residential areas, high-rise buildings, etc.

[0004] In recent years, my country's power industry has developed rapidly, which has played a positive role in increasing my country's energy supply, adjusting energy structure and protecting the ecological environment. As a result, a large number of switch cabinets are used. For the security of switch cabinets, manual regular inspections are generally adopted, which requires a lot of manpower and material resources. As the number of switch cabinets increases, the operation and maintenance personnel may cause false alarms and omissions due to information overload during inspections, and their ability to effectively examine the status of each switch cabinet and the quality of related inspection work will be reduced. Summary of the invention

[0005] In view of the above-mentioned existing security for a large number of switch cabinets, generally a manual regular inspection method is adopted, which requires a lot of manpower and material resources, and as the number of switch cabinets increases, the operation and maintenance personnel may cause false alarms and missed reports due to information overload during the inspection, and their ability to effectively examine the status of each switch cabinet and the quality of related inspection work will be reduced. The present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a monitoring system for a switch cabinet, which aims to: realize advanced automatic intelligent monitoring of the switch cabinet, reduce personnel redundancy, reduce labor intensity of personnel, improve work efficiency, and effectively avoid the problem of inaccurate status monitoring caused by false alarms and omissions due to information overload caused by manual inspections.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: A monitoring system for a switch cabinet, comprising a control module, a signal acquisition module, a signal processing module, a transmission module, a sensor module and a server; The switch cabinet is provided with multiple groups of signal acquisition modules, the signal acquisition modules and the signal processing modules are electrically connected, the control module and the signal processing module are electrically connected, the sensor module is used to obtain monitoring information of the switch cabinet and send the monitoring information to the signal acquisition module, and the control module is used to determine whether to send a control instruction to the circuit breaker of the switch cabinet according to the monitoring information.

[0008] As a preferred solution of the monitoring system for a switch cabinet of the present invention, the sensor module includes a temperature sensor, a current sensor and a voltage sensor.

[0009] As a preferred solution of the monitoring system for a switch cabinet of the present invention, the temperature sensor, the current sensor and the voltage sensor are all connected to the control module and are all used to connect to the circuit breaker of the switch cabinet.

[0010] As a preferred solution of the monitoring system for switch cabinet described in the present invention, the control module includes an A / D converter, a data acquisition card and a controller, the sensor module is connected to the A / D converter, the A / D converter is connected to the data acquisition card, the data acquisition card is connected to the controller, and the controller is used to connect to the circuit breaker of the switch cabinet.

[0011] As a preferred solution of the monitoring system for a switch cabinet of the present invention, the transmission module is used to communicate with a server.

[0012] As a preferred solution of the monitoring system for switch cabinets described in the present invention, the signal processing module is an STM32 microcontroller, which is used for data preprocessing and control.

[0013] As a preferred solution of the monitoring system for switch cabinet described in the present invention, the signal acquisition module includes a signal input and output interface, a signal conditioning circuit, an analog-to-digital converter and a memory, the signal input and output interface is a corresponding connection port designed according to the type of sensor, the signal conditioning circuit includes an operational amplifier, a filter and other circuits for amplifying and processing the input signal, the analog-to-digital converter converts the conditioned analog signal into a digital signal, and the memory is used to temporarily store the collected data.

[0014] As a preferred solution of the monitoring system for switch cabinets described in the present invention, the temperature sensor is a non-contact infrared temperature sensor, the current sensor is a current transformer, and the voltage sensor is a voltage transformer.

[0015] As a preferred solution of the monitoring system for a switch cabinet of the present invention, the circuit breaker is a vacuum circuit breaker.

[0016] The beneficial effects of the present invention are as follows: the monitoring system can collect the operating data of the switch cabinet in real time, including key parameters such as temperature, current and voltage. Once an abnormality is found, an alarm will be immediately issued, which greatly shortens the fault discovery time and reduces the losses caused by the failure to discover the fault in time. During manual inspection, the operation and maintenance personnel need to directly contact the equipment, which may cause safety risks such as electric shock and mechanical injury. The monitoring system reduces the need for personnel to enter dangerous areas through remote monitoring, and reduces the probability of safety accidents. At the same time, manual inspection is limited by factors such as personnel experience and fatigue, and there may be omissions and misjudgments. The intelligent monitoring system can continuously and accurately collect data, and improve the accuracy and efficiency of fault detection through algorithm analysis. The system can automatically record historical data, providing rich data support for subsequent fault analysis, performance evaluation, and maintenance plan formulation. Through big data analysis, the equipment life can be predicted, maintenance can be arranged in advance, and unplanned downtime can be avoided. Finally, the labor cost, training cost and maintenance cost caused by faults of manual inspection can be significantly reduced. At the same time, by optimizing the maintenance strategy, the service life of the equipment can be extended, and the overall cost can be further reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them: Figure 1 The figure is a schematic diagram of the overall process of the monitoring system for switch cabinet of the present invention. DETAILED DESCRIPTION

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0019] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. Example

[0020] Reference Figure 1 , is an embodiment of the present invention, and provides a monitoring system for a switch cabinet, the monitoring system for a switch cabinet includes a control module, a signal acquisition module, a signal processing module, a transmission module, a sensor module and a server; The switch cabinet is provided with multiple groups of signal acquisition modules, the signal acquisition module and the signal processing module are electrically connected, the control module and the signal processing module are electrically connected, the sensor module is used to obtain the monitoring information of the switch cabinet and send the monitoring information to the signal acquisition module, and the control module is used to determine whether to send a control instruction to the circuit breaker of the switch cabinet according to the monitoring information.

[0021] The signal processing module is an STM32 microcontroller, which is used for data preprocessing and control. It has strong processing capabilities and rich peripheral interfaces, and is suitable for more complex applications.

[0022] The signal acquisition module includes a signal input and output interface, a signal conditioning circuit, an analog-to-digital converter, and a memory. The signal input and output interface is designed with corresponding connection ports according to the type of sensor (such as analog or digital signal). The signal conditioning circuit includes an operational amplifier, a filter, and other circuits to amplify and process the input signal for subsequent conversion and analysis. The analog-to-digital converter converts the conditioned analog signal into a digital signal. The memory is used to temporarily store the collected data.

[0023] The sensor module includes a temperature sensor, a current sensor and a voltage sensor. The temperature sensor, the current sensor and the voltage sensor are all connected to the control module and are all used to connect to the circuit breaker of the switch cabinet.

[0024] The temperature sensor is the MLX90614, a non-contact infrared temperature sensor capable of measuring temperatures in the range of -70°C to +380°C.

[0025] The current sensor is the AACT series current transformer, a toroidal design, suitable for medium and high voltage power equipment.

[0026] The voltage sensor is a BVT series voltage transformer with good linearity and low error, suitable for power measurement and protection.

[0027] The circuit breaker is a vacuum circuit breaker, using Siemens 8DA series.

[0028] The control module includes an A / D converter, a data acquisition card and a controller. The sensor module is connected to the A / D converter, the A / D converter is connected to the data acquisition card, the data acquisition card is connected to the controller, and the controller is used to connect the circuit breaker of the switch cabinet.

[0029] The transmission module is used to communicate with the server.

[0030] In the early stage of switchgear operation, the partial discharge level is generally very low. However, after a period of use, the insulation parts will age and the insulation level will decrease. Therefore, it is common for the switchgear to have an increased partial discharge intensity after long-term operation. The previous detection method was regular manual inspection, which was time-consuming and labor-intensive, and could not be detected online in real time. Now, by installing a signal acquisition module on the switchgear, the signal acquisition module can collect the operation data of the switchgear in real time and transmit it to the signal processing module. At the same time, a sensor module is installed on the switchgear. The sensor module can collect the temperature, current and voltage data of the switchgear in real time. The signal processing module judges the operation status of the switchgear based on previous data. The signal processing module transmits the processed data to the transmission module, and transmits it to the server through the transmission module via the wireless network. Then the monitoring personnel view the operation data and status of the switchgear through the display device on the server. When an abnormal situation occurs, the monitoring personnel can take corresponding countermeasures and send instructions to the transmission module through the server. Then, the circuit breaker on the switchgear is opened and closed through the control module to avoid equipment accidents.

[0031] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A monitoring system for a switch cabinet, characterized in that: It includes a control module, a signal acquisition module, a signal processing module, a transmission module, a sensor module and a server; The switch cabinet is provided with multiple groups of signal acquisition modules, the signal acquisition modules and the signal processing modules are electrically connected, the control module and the signal processing module are electrically connected, the sensor module is used to obtain monitoring information of the switch cabinet and send the monitoring information to the signal acquisition module, and the control module is used to determine whether to send a control instruction to the circuit breaker of the switch cabinet according to the monitoring information.

2. A monitoring system for a switch cabinet according to claim 1, characterized in that: The sensor module includes a temperature sensor, a current sensor and a voltage sensor.

3. A monitoring system for a switch cabinet according to claim 2, characterized in that: The temperature sensor, current sensor and voltage sensor are all connected to the control module and are used to connect to the circuit breaker of the switch cabinet.

4. A monitoring system for a switch cabinet according to claim 3, characterized in that: The control module includes an A / D converter, a data acquisition card and a controller, the sensor module is connected to the A / D converter, the A / D converter is connected to the data acquisition card, the data acquisition card is connected to the controller, and the controller is used to connect the circuit breaker of the switch cabinet.

5. A monitoring system for a switch cabinet according to claim 4, characterized in that: The transmission module is used for communicating with the server.

6. A monitoring system for a switch cabinet according to claim 1, characterized in that: The signal processing module is an STM32 microcontroller, which is used for data preprocessing and control.

7. The monitoring system for a switch cabinet according to claim 1, characterized in that: The signal acquisition module includes a signal input and output interface, a signal conditioning circuit, an analog-to-digital converter and a memory. The signal input and output interface is a corresponding connection port designed according to the type of sensor. The signal conditioning circuit includes an operational amplifier, a filter and other circuits for amplifying and processing the input signal. The analog-to-digital converter converts the conditioned analog signal into a digital signal. The memory is used to temporarily store the collected data.

8. The monitoring system for a switch cabinet according to claim 1, characterized in that: The temperature sensor is a non-contact infrared temperature sensor, the current sensor is a current transformer, and the voltage sensor is a voltage transformer.

9. A monitoring system for a switch cabinet according to claim 1, characterized in that: The circuit breaker is a vacuum circuit breaker.

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