CN113739846A - Switch cabinet based on multi-parameter detection and universal monitoring and management system - Google Patents
Switch cabinet based on multi-parameter detection and universal monitoring and management system Download PDFInfo
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Abstract
The invention relates to the technical field of power distribution equipment, and provides a general type switch cabinet monitoring and management system based on multi-parameter detection. The system applies a data transmission system framework of a lower computer (parameter acquisition module), a middle computer (comprehensive protection module) and an upper computer (data analysis module), and comprises the parameter acquisition module, the comprehensive protection module and the data analysis module. Utilize parameter acquisition module to obtain behind the cubical switchboard equipment information, upload to cabinet body integrated protection unit with the wired communication mode, this part can tentatively judge whether the trouble takes place, carry out the operation in advance to the cubical switchboard, protective apparatus, and send maintenance personal mobile device with fault information (if the trouble) with the mode of wireless WIFI communication, timely maintenance equipment, this system has the portability, only need give independent correction to the algorithm threshold value, can be applicable to the cabinet body detection demand of different models, effectively reduce the outage and overhaul the number of times, prolong the cabinet body and equipment operating duration.
Description
Technical Field
The invention relates to the technical field of power distribution equipment, in particular to a multi-parameter detection-based universal switch cabinet monitoring and management system.
Background
A power switchgear is a switching device that plays an important role in a power system, and is a power distribution device in which related electrical devices are assembled to a closed metal housing according to a certain circuit scheme. When electric power or circuit break down, the cubical switchboard can be with the trouble part amputate from the electric wire netting fast, except that guarantee other trouble-free parts of electric power system safe operation, also can protect equipment and maintenance personal's safety. Therefore, the method is widely applied to distribution systems of various voltage classes.
In recent years, along with the deep popularization of a low-voltage governing project, high (such as 35kV) and low (such as 690, 400V) voltage switch cabinets and other switch equipment are more applied to power distribution areas at the tail ends of power grids. The large-area use, frequent on-off actions and less monitoring and management between the switch cabinet and the transformer, and between the switch cabinet internal multi-loop and the cabinet all cause frequent faults and premature equipment scrap, and cause serious influence on a distribution network. In order to solve the above problems, the CN108808468A patent proposes a high-performance low-voltage intelligent switch cabinet, which uses devices for dehumidification, heat dissipation, dust removal, etc. in the cabinet to ensure the normal operation of the switch cabinet by detecting parameters such as humidity, temperature, etc., but does not make a judgment on fault information; the patent cn201811012920.x provides a switch cabinet detection system and method, which can realize accurate detection of a switch cabinet local discharge fault by detecting a local discharge parameter, but the patent only relates to a fault caused by the switch cabinet local discharge, cannot realize judgment of other fault types, does not provide fault prejudgment, and cannot effectively guarantee subsequent normal operation of the switch cabinet.
Disclosure of Invention
The invention provides a multi-parameter-based general type switch cabinet monitoring and management system, aiming at the defects in the existing switch cabinet detection technology, the system is generally applicable to the detection of the existing high-low voltage switch cabinet by measuring the related parameters of the switch cabinet, the normal range of a certain parameter can be adjusted according to the type of the detected switch cabinet to realize the general detection, and the data analysis is carried out by utilizing an upper computer through a data system architecture of a lower computer, a middle computer and the upper computer to realize the three-dimensional management of the switch cabinet.
The invention provides a multi-parameter-based universal switch cabinet monitoring and management system, which applies a data transmission system framework of a lower computer (a parameter acquisition module), a middle computer (a comprehensive protection module) and an upper computer (a data analysis module), and comprises the parameter acquisition module, the comprehensive protection module and the data analysis module.
The data transmission system framework is characterized in that parameters measured by a lower computer (a parameter acquisition module) are transmitted to the comprehensive protection module in a wired mode in an RS485 or other communication port output mode, data and analysis are carried out by the comprehensive protection module, fault information (if the fault occurs) is sent to maintenance personnel mobile equipment in a wireless WIFI communication mode, normal operation of the equipment is maintained timely, existing information of the equipment is transmitted to the upper computer in a wireless optical fiber mode, and machine learning algorithm in the upper computer is operated to carry out follow-up analysis.
The parameter acquisition module comprises: the device comprises a mechanical parameter acquisition unit, a temperature acquisition unit, a humidity acquisition unit, a partial discharge parameter acquisition unit, a video monitoring unit and a control and transmission unit.
The mechanical parameter detection unit is used for measuring the torque of the energy storage motor of the circuit breaker, the action stroke of a switch of the circuit breaker and the loop current parameter information through a torque sensor, a unique sensor and a current transformer. The circuit breaker is an important device of the switch cabinet, and the state of the circuit breaker is directly related to the normal operation of the switch cabinet. Therefore, the time, the stress situation, the opening and closing speed and the times of the breaker during opening and closing are analyzed by detecting the torque information of the energy storage motor of the breaker; judging whether the opening and closing of the circuit breaker are in place or not by detecting the action stroke of the circuit breaker switch; and whether the overcurrent phenomenon exists is judged by measuring and obtaining the current parameter in the loop and comparing the current parameter with the rated current of the circuit breaker. And subsequently, the residual on-off times of the equipment are obtained by inquiring the rated on-off times, the historical on-off times and the on-off frequency of the certain breaker. Mechanical parameter detection can provide the current situation of equipment and overhauls the scheme promptly, can realize the life cycle management of circuit breaker and cubical switchboard equipment. The temperature acquisition unit is characterized in that a plurality of temperature sensors (such as ATE200+ BD-6 temperature sensors) are arranged in and outside the cabinet for multipoint temperature measurement, and the internal and external temperatures of the cabinet are detected to judge positions of the cabinet with local overheating problems, so that the condition of the cabinet and possible fault problems are predicted. The humidity acquisition unit detects the humidity condition in the cabinet at multiple points through a humidity sensor (such as a TNTR-S humidity sensor). Because of the heating of the power device and the influence of environmental conditions, the phenomena of condensation and the like which influence the normal operation of the power equipment are easy to occur. The partial discharge module is used for detecting partial discharge information of the switch cabinet by using an ultrasonic sensor and a transient ground voltage sensor. When the switch cabinet is put into operation, partial discharge phenomena with different degrees exist, so that the insulativity of certain insulating equipment is degraded, and major accidents are caused. The video monitoring unit is used for placing a camera into the cabinet, monitoring important parts such as a circuit breaker, a busbar, an incoming line and an external environment, realizing visual monitoring and effectively guaranteeing safe operation of equipment.
And uniformly accessing the sensors to an MCU control unit for data acquisition to form a data acquisition module, and transmitting data in a wired mode.
The comprehensive protection module is a comprehensive protection device and a data input and output part thereof. The device can compare the data measured by the sensors connected in the cabinet with normal values. If the real-time parameters exceed the normal values or preset values, the unit can generate an alarm instruction to control a certain breaker to open or start a dehumidification and temperature control device so as to ensure the normal operation of the whole switch cabinet. Meanwhile, the device has the functions of short-time data storage and data transmission; the fault information and the parameter data can be sent to the maintenance personnel mobile equipment and the upper computer in a wireless mode in real time.
The data analysis module utilizes an upper computer to realize the fault prejudgment of the switch cabinet and realizes the management part of the switch cabinet. Different parameters of a lower computer are input into a model established by a machine learning algorithm, time nodes of data change are obtained through analysis, preliminary fault prejudgment is achieved, and subsequently fault types can be further determined through comparison with data in a fault database; and then the model can be utilized and the current use situations of the switch cabinet and the equipment are combined to carry out three-dimensional management on the life cycle of the switch cabinet and three-dimensional management on the switch cabinet and the powered equipment.
The life cycle three-dimensional management can calculate the residual on-off times by looking up the rated on-off times and the historical on-off times of the circuit breaker in the switch cabinet, and judge the residual service life of the switch cabinet by combining the factors such as the fault occurrence cycle and the service environment in the model;
the three-dimensional management of the switch cabinet and the powered equipment comprises three-dimensional management of a standby loop and three-dimensional management of equipment operation; the standby loop three-dimensional management is characterized in that a standby loop or a cabinet body is often configured to ensure the normal operation of powered equipment because the starting modes and powers of other equipment such as a load motor connected to the tail end of some cabinet bodies are different, and the problems of difficulty in realizing the functions of partial equipment, frequent switching on and off, frequent faults and the like exist. And (4) increasing, decreasing and adjusting the spare loop or the cabinet body according to the actual condition of the equipment connected with the switch cabinet. The equipment operation three-dimensional management is that the equipment use causes frequent switch cabinet protection actions, normal operation and service time of the equipment and the switch cabinet are influenced, the use of the powered equipment or cabinet body arrangement needs to be adjusted, and the three-dimensional management of the equipment use is realized.
According to the technical scheme, the switch cabinet monitoring and management system based on multi-parameter detection provided by the invention has the advantages that the data collected by the lower computer is sent to the middle computer and the upper computer to realize fault alarm and data analysis in a wired and wireless data transmission mode, so that a maintenance and improvement scheme is provided, the switch cabinet three-dimensional management is realized, the power-off maintenance times are effectively reduced, and the operation time of a cabinet body and equipment is prolonged.
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the invention in any way, and in which:
fig. 1 shows a practical management flow chart of a general-purpose switch cabinet monitoring and management system based on multi-parameter detection according to the present invention;
FIG. 2 illustrates a switch cabinet data transmission architecture system diagram of the present invention;
FIG. 3 shows a schematic diagram of the operation of the parameter acquisition module of the present invention;
FIG. 4 shows a diagram of the status monitoring and fault pre-determination steps of the light cabinet of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings. All inventions obtained by a person skilled in the art without any creative effort based on the present invention belong to the protection scope of the present invention.
Fig. 1 is an actual management flowchart of a general-purpose switch cabinet monitoring and management system based on multi-parameter detection, referring to fig. 1, the system applies a data transmission system architecture of a lower computer (parameter acquisition module), a middle computer (comprehensive protection module) and an upper computer (data analysis module), and comprises a parameter acquisition module, a comprehensive protection module and a data analysis module. After the parameter acquisition module is used for acquiring equipment information of the switch cabinet, the parameter data acquired by a lower computer is uploaded to the cabinet body comprehensive protection module in a wired RS485 communication mode, whether a fault occurs or not can be preliminarily judged by the part, the switch cabinet is operated in advance, the equipment is protected, the fault information (if the fault occurs) is sent to maintenance personnel mobile equipment in a wireless WIFI communication mode, the equipment is maintained in time, meanwhile, the existing information of the equipment is transmitted to an upper computer in a wireless optical fiber mode, after data processing is carried out by using a machine learning algorithm model, fault pre-judgment can be realized by building a model, namely, if a real-time data waveform does not accord with the model, a fault occurrence time node can be preliminarily judged, the information is compared with a historical fault database, the fault type can be determined, and the fault pre-judgment of the switch cabinet can be realized. And subsequently, the residual on-off times of the equipment are obtained by inquiring the rated on-off times, the historical on-off times and the on-off frequency of a certain breaker and analyzing the on-off frequency of the equipment, real-time measured parameters are led into the model, the residual service life of the cabinet body is comprehensively obtained by combining the residual on-off times, and the three-dimensional management of the service life cycle of the switch cabinet is realized. Meanwhile, according to the current situation of the equipment use and whether the specific function of the equipment connected with the switch cabinet is in place, the adjustment and increase and decrease suggestions of the connected standby circuit or cabinet body are provided, and the three-dimensional management of the standby circuit of the switch cabinet is realized; according to the protection action frequency degree of the switch cabinet, the reason that connected equipment is frequently switched on and off is analyzed, the adjustment suggestions of equipment use and cabinet body arrangement are provided in a targeted mode, and the equipment operation three-dimensional management is achieved.
Fig. 2 is a system diagram of a data transmission architecture of a switch cabinet according to the present invention. After the parameter acquisition module uploads the measured related parameters to the comprehensive protection device in an RS485 communication mode, whether a fault occurs or not can be preliminarily judged. And data are transmitted to the maintenance personnel mobile equipment and the upper computer part in a WIFI and optical fiber wireless data transmission mode, and cabinet body maintenance and equipment three-dimensional management by utilizing data analysis can be carried out subsequently.
FIG. 3 is a schematic diagram of the operation of the parameter acquisition module of the present invention. This module includes: the device comprises a mechanical parameter acquisition unit, a temperature acquisition unit, a humidity acquisition unit, a partial discharge parameter acquisition unit, a video monitoring unit and a control and transmission unit. The MCU unit uniformly controls parameter acquisition and uploads the parameters to the central computer (namely the comprehensive protection device) in an RS485 wired communication mode.
It should be noted that, except for the detection of mechanical parameters, the detection of other parameters all adopts a multi-point measurement mode to ensure the accuracy of data measurement.
FIG. 4 shows a machine learning algorithm applied to a data analysis model:
(1) importing data sent by the middle position machine into a computer;
(2) analyzing data, knowing a data distribution rule, determining independent variables (such as temperature, humidity, running time and the like) and dependent variables (residual service life of a switch cabinet or residual on-off times of a circuit breaker) and preliminarily determining a correlation;
(3) screening the dependent variables in the step (2) and extracting the characteristics of the dependent variables;
(4) vectorizing the vector in the step (3) to enhance the characteristic;
(5) splitting a lower computer data set into a model training subset and an evaluation model subset according to different application modes, wherein the splitting ratio is 7: 3;
(6) and (3) selecting a linear regression analysis method, and carrying out data model training by using the model training subset in the step (5), wherein the formula can be expressed as:
in the formula, y1For insulating property of cabinet body, y2For the current breaker to break the current, biIs a regression coefficient, xi，ziThe values of other parameters such as temperature, humidity and machinery.
(7) Evaluating the model in the step (6) by using the evaluation model subset in the step (5);
(8) and detecting the current state based on the model and the real-time parameters, searching data mutation points based on the training model, and combining a fault database to realize fault pre-judgment. Subsequent to
The three-dimensional management of the service life cycle of the switch cabinet can be realized by combining the residual on-off times of the circuit breaker based on fault prediction.
It should be noted that the device portability of the detection system can be realized by adjusting preset parameters of the model built by the integrated protection device and the upper computer and adjusting parameter thresholds according to cabinets with different voltage levels and different application environments.
Claims (13)
1. A switch cabinet and a universal monitoring management system based on multi-parameter detection are characterized in that the system applies a data transmission system framework of a lower computer (a parameter acquisition module), a middle computer (a comprehensive protection module) and an upper computer (a data analysis module), and comprises the parameter acquisition module, the comprehensive protection module and the data analysis module;
the data transmission system architecture applies the data transmission system architecture of a lower computer (a parameter acquisition module), a middle computer (a comprehensive protection module) and an upper computer (a data analysis module). The lower computer-middle computer data transmission part can transmit the parameters measured in the cabinet to the device in an RS485 wired communication mode and store the parameters in a short time; the data transmission part of the host computer and the upper computer can transmit fault information and parameter data to the upper computer in a wireless optical fiber mode in real time, and transmit the fault information to the mobile equipment of maintenance personnel in a wireless WIFI mode.
The parameter acquisition module, lower computer promptly includes: the device comprises a mechanical parameter acquisition unit, a temperature acquisition unit, a humidity acquisition unit, a partial discharge parameter acquisition unit, a video monitoring unit and a control and transmission unit;
the comprehensive protection module, namely the central computer, has the functions of alarming, data input and output, short-time storage and control. When a fault occurs, the loop can be automatically cut off; when the temperature and humidity in the cabinet are abnormal, the dehumidifying device (such as condensation removing) and the temperature control device (such as a cold and hot fan) which are arranged in the cabinet can be started.
The data analysis module, namely the upper computer, utilizes a machine learning algorithm to analyze the parameter data acquired by the lower computer so as to realize the three-dimensional management of the service life cycle of the switch cabinet and the three-dimensional management of the equipment use.
2. The switch cabinet universal monitoring and management system based on multi-parameter detection as claimed in claim 1, wherein the universal detection is realized by modifying preset parameter thresholds of a comprehensive protection unit (a central computer) and a data analysis module (an upper computer).
3. The system for monitoring and managing the switch cabinet universal type based on multi-parameter detection as claimed in claim 1, wherein the mechanical parameter detection unit is configured to measure the parameters of the circuit breaker energy storage motor torque, the circuit breaker switch operation stroke and the circuit current through a torque sensor (such as ZH07 torque sensor), a displacement sensor (GEFRAN displacement sensor) and a current transformer (LA58-P current transformer).
4. The system for monitoring and managing the switch cabinet according to claim 1, wherein the temperature acquisition unit is configured to place a plurality of temperature sensors (e.g. ATE200+ BD-6 temperature sensors) inside and outside the cabinet for multi-point detection of the temperature inside the cabinet.
5. The switch cabinet universal monitoring and management system based on multi-parameter detection as claimed in claim 1, wherein the humidity acquisition unit needs to place a plurality of sensors (such as TNTR-S humidity sensor) inside and outside the cabinet, and detects the humidity condition inside the cabinet at multiple points.
6. The system as claimed in claim 1, wherein the partial discharge module is configured to detect partial discharge information of the switch cabinet at multiple points by using an ultrasonic sensor (e.g. PXR15RMH ultrasonic sensor).
7. The multi-parameter detection-based switch cabinet universal monitoring and management system according to claim 1, wherein the video monitoring unit is used for monitoring important parts such as a circuit breaker, a busbar and an incoming line by placing a camera in the cabinet to realize visual monitoring.
8. The switch cabinet universal monitoring and management system based on multi-parameter detection according to claim 1, wherein a dehumidifying device (such as dewing) and a temperature control device (such as a cooling and heating fan) are equipped in the cabinet.
9. The system for monitoring and managing the general type of the switch cabinets based on the multi-parameter detection is characterized in that the data analysis module is an upper computer part of a data system architecture and a part for three-dimensionally managing the switch cabinets by using the upper computer.
10. The multi-parameter detection-based switch cabinet universal monitoring and management system according to claim 11, wherein the upper computer is embedded with a machine learning algorithm, and an application model is built to realize fault pre-judgment, and the specific mode is as follows: if the real-time data waveform does not accord with the model, the fault can be preliminarily judged, and the fault type can be determined by comparing the information with a historical fault database.
11. The system for monitoring and managing the switch cabinet based on multi-parameter detection as claimed in claim 11, wherein the switch cabinet three-dimensional management refers to three-dimensional management of a life cycle of the switch cabinet and three-dimensional management of the switch cabinet and a received electrical device by using an upper computer.
12. The switch cabinet universal monitoring and management system based on multi-parameter detection according to claim 13, wherein the life cycle of the switch cabinet is managed three-dimensionally, and the remaining number of on/off times of the equipment is obtained by inquiring the rated number of on/off times, the historical number of on/off times and the equipment on/off frequency analysis of a certain breaker; and (4) importing the real-time measured parameters into the model, and comprehensively obtaining the residual service life of the cabinet body by combining the residual on-off times, thereby realizing the three-dimensional management of the service life cycle of the switch cabinet.
13. The multi-parameter detection-based switch cabinet universal monitoring and management system according to claim 13, wherein the three-dimensional management of the switch cabinet and the received electrical equipment is to increase, decrease and adjust the spare loop or the cabinet body according to the actual use condition of the equipment connected to the switch cabinet; according to the frequency degree of the protection actions of the switch cabinet, use improvement suggestions are provided for the used equipment, and the three-dimensional management of the used equipment is realized.
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| CN115728627A (en) * | 2022-10-09 | 2023-03-03 | 上海新联合电气有限公司 | Electric sound contact fault is judgement system in advance |
| CN117556222A (en) * | 2024-01-10 | 2024-02-13 | 吉林省东启铭网络科技有限公司 | Big data-based power station equipment real-time state evaluation and fault early warning method |
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2021
- 2021-08-13 CN CN202110928520.9A patent/CN113739846A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114967571A (en) * | 2022-07-28 | 2022-08-30 | 山东汇能电气有限公司 | Aerify cabinet remote monitering system based on internet |
| CN115728627A (en) * | 2022-10-09 | 2023-03-03 | 上海新联合电气有限公司 | Electric sound contact fault is judgement system in advance |
| CN117556222A (en) * | 2024-01-10 | 2024-02-13 | 吉林省东启铭网络科技有限公司 | Big data-based power station equipment real-time state evaluation and fault early warning method |
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