CN220043055U - Low-voltage switch cabinet monitoring device and monitoring system - Google Patents
Low-voltage switch cabinet monitoring device and monitoring system Download PDFInfo
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
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Abstract
The utility model belongs to the field of intelligent comprehensive power distribution of power distribution networks, and particularly relates to a low-voltage switch cabinet monitoring device and a monitoring system. The monitoring system comprises a plurality of monitoring devices, an industrial personal computer, a display screen and an audible and visual alarm module, wherein the audible and visual alarm module is used for displaying alarm signals through the display screen and sending out alarm signals through the audible and visual alarm module, so that monitoring personnel in a monitoring room can intuitively know the state of the corresponding low-voltage switch cabinet.
Description
Technical Field
The utility model belongs to the field of intelligent comprehensive power distribution of power distribution networks, and particularly relates to a low-voltage switch cabinet monitoring device and a monitoring system.
Background
The low-voltage switch cabinet is used for electric energy conversion, distribution and control of power, distribution and motor control centers, capacitance compensation and the like of low-voltage distribution systems of power plants, substations, petrochemical departments, factories and mining enterprises, restaurants, high-rise buildings and the like. The special requirements of interfaces with computers can be met in the power use occasions of large-single-machine-capacity power plants, low-voltage power control centers, motor control centers and the like in the industries of large-scale petrifaction and the like. The GCS switch cabinet is designed according to the requirements of the upper level of a main pipe of an electric power department, vast power users and design departments, and aims to meet the requirements of the continuously developed electric power market on capacity increase, computer interfaces, centralized power control, convenient installation and maintenance, shortened accident handling time and the like, and the novel low-voltage extraction switch cabinet designed according to the principles of safety, economy, rationality and reliability can be used as a substitute product of the low-voltage extraction switch cabinet. The GCS switch cabinet has the characteristics of high breaking and switching-on capacity, good dynamic stability, flexible electrical scheme, convenience in combination, strong seriality and practicability, novel structure, high protection level and the like. Meets the standards of IEC439-1 low-voltage complete switch equipment and control equipment, GB7251 low-voltage complete switch equipment, EBK36001 low-voltage extraction complete switch equipment and the like.
The GCS type low-voltage draw-out switch cabinet is suitable for power distribution systems in power plants, petroleum, chemical industry, metallurgy, textile, high-rise buildings and other industries. In a place where a large-scale power plant, a petrochemical system, or the like is highly automated and a computer interface is required, the low-voltage switchgear is used as a low-voltage switchgear for power distribution, centralized control of a motor, or the like in a power generation and supply system having a three-phase ac frequency of 50 (60) Hz, a rated operating voltage of 380V (400V) or 660V, and a rated current of 4000A or less.
However, with the development of economy, the power consumption load is continuously increased and the power distribution system is continuously intelligent, so that a plurality of power supply loops are led to be led out to be seriously overloaded, and in the use process, the connection parts of the switches of the power supply system are in poor contact to generate instantaneous sparks, even equipment elements are burnt out and even fire is caused, so that the running condition of the circuit breaker lines in the switch cabinet needs to be monitored at any time to ensure the safe running of the power distribution system. The circuit breaker switch itself in the low-voltage switchgear is such that it allows low overload operation of the line for a certain time. Under the condition, the temperature rise of the outgoing line of the line can not cause the line to fail. Often the actual situation is: when the circuit operates, the circuit is in contact with the copper bar wire lap joint part of the circuit breaker, and the circuit operates for a long time, so that the circuit is in contact with the copper bar wire lap joint part of the circuit breaker due to temperature rise, and the circuit finally causes sparks at fault parts, even open fires, so that equipment or electric fires are burnt. In the prior art, a photoelectric sensor is generally arranged in the low-voltage switch cabinet body, and carbon dioxide is released to extinguish a fire when the photoelectric sensor detects that the flash light exists, for example, the low-voltage switch cabinet provided by Chinese patent No. CN 203850707U can automatically eliminate fire hidden danger. However, this monitoring method can only monitor the sparks after the fire has occurred, but cannot pre-alarm the instantaneous sparks generated by the switching device and not yet causing the fire.
Disclosure of Invention
In order to solve the problems, the utility model provides a low-voltage switch cabinet monitoring device and a monitoring system, and the specific technical scheme is as follows:
a low-voltage switch cabinet monitoring device comprises a controller, a photoelectric sensor, a clock module, a communication module and a circuit breaker; the circuit breaker is provided with a shunt release and is arranged at the outlet of the low-voltage switch cabinet; the photoelectric sensor, the clock module and the communication module are respectively connected with a controller, and the controller is connected with a shunt release of the circuit breaker;
the photoelectric sensor is arranged near the lap joint position of the switch copper bar or the cable in the low-voltage switch cabinet, and is used for monitoring whether the lap joint position of the switch copper bar or the cable generates an optical signal or not and transmitting the signal acquired by monitoring to the controller; the clock module is used for providing a clock source for the controller; the controller is used for judging whether the light signal is one of an instantaneous spark signal, a continuous instantaneous spark signal and a continuous spark signal according to the comparison of the duration time of the light signal acquired by the photoelectric sensor and a set time threshold value, sending an alarm signal to a remote control center or sending a control signal to a shunt release of the circuit breaker according to a judging result, and forcibly opening the circuit breaker according to the control signal sent by the controller.
Preferably, the photoelectric sensors are provided with a plurality of photoelectric sensors, and the plurality of photoelectric sensors are respectively connected with different interfaces of the controller.
Preferably, the communication module performs data transmission in a wired and wireless mode.
Preferably, the device further comprises a power supply module, wherein the power supply module comprises a rechargeable storage battery and a power supply control circuit, the rechargeable storage battery is respectively connected with the power supply control circuit and the controller and used for providing working power for the device, and the power supply control circuit is connected with a power supply circuit in the low-voltage switch cabinet and used for charging the rechargeable storage battery when the electric quantity of the storage battery is insufficient.
Preferably, the device further comprises an output voltage conversion unit, wherein the output voltage conversion unit is respectively connected with the rechargeable storage battery and the controller and is used for converting the voltage output by the rechargeable storage battery into a power supply voltage suitable for the operation of the controller.
Preferably, the power supply control circuit comprises a storage battery voltage acquisition unit, a control unit and a change-over switch; the storage battery voltage acquisition unit is respectively connected with the rechargeable storage battery and the control unit, the control unit is connected with the change-over switch, and the change-over switch is respectively connected with a power line in the low-voltage switch cabinet and the rechargeable storage battery;
the storage battery voltage acquisition unit is used for acquiring output voltage signals of the rechargeable storage battery and inputting the acquired signals to the control unit, and the control unit is used for comparing the voltage signals acquired by the storage battery voltage acquisition unit with a preset voltage threshold value and controlling the switching of the change-over switch according to a comparison result so as to realize connection between the opening or closing of a power supply circuit in the low-voltage switch cabinet and the rechargeable storage battery.
Preferably, the device further comprises an input voltage conversion unit, wherein the input voltage conversion unit is respectively connected with a power line and a change-over switch in the low-voltage switch cabinet and is used for converting a voltage signal output by the power line in the low-voltage switch cabinet into a voltage suitable for charging a rechargeable storage battery.
The low-voltage switch cabinet monitoring system comprises a plurality of monitoring devices, an industrial personal computer, a display screen and an audible and visual alarm module; the industrial personal computer, the display screen and the audible and visual alarm module are arranged in the monitoring room; each monitoring device is provided with a unique ID number;
the industrial personal computer is respectively connected with the communication modules, the display screens and the audible and visual alarm modules of the monitoring devices, and is used for receiving the alarm signals transmitted by the monitoring devices, displaying the transmitted alarm signals through the display screens and controlling the audible and visual alarm modules to send out audible and visual alarm signals.
Preferably, the system further comprises a data transmission unit DTU, wherein the data transmission unit DTU is used for sending an alarm short message to a monitoring person in a GPRS communication mode.
The working principle of the monitoring device of the utility model is as follows: the photoelectric sensor in the low-voltage switch cabinet monitors whether spark signals are generated at the lap joint position of the switch copper bar or the cable in the low-voltage switch cabinet, if the spark signals are generated, the photoelectric sensor collects corresponding optical signals and transmits the optical signals to the controller, the controller judges whether the duration of the corresponding optical signals is one of instantaneous spark signals, continuous instantaneous spark signals and continuous spark signals through comparison with a preset time threshold value, if the duration of the corresponding optical signals is smaller than the first time threshold value, the controller judges that the optical signals are instantaneous spark signals, and the controller sends alarm signals to a remote control center through the communication module.
If the optical signals collected in the second time threshold are discontinuous and the duration time of each time is smaller than the first time threshold, the continuous instant spark signals are judged, and if the duration time of the corresponding optical signals is larger than the third time threshold, the continuous spark signals are judged. When the continuous instantaneous spark signal or the continuous spark signal is judged, the controller sends an alarm signal to the remote control center through the communication module, and simultaneously sends a control signal to control the shunt release, and the shunt release forcibly cuts off the circuit breaker so as to cut off an external load of the low-voltage switch cabinet.
The beneficial effects of the utility model are as follows:
the monitoring device comprises a controller, a photoelectric sensor, a clock module, a communication module and a circuit breaker, wherein the photoelectric sensor is arranged near the lap joint position of the switch copper bar or the cable in the low-voltage switch cabinet, so that the spark signal generated by the lap joint position of the switch copper bar or the cable can be accurately collected, one of an instantaneous spark signal, a continuous instantaneous spark signal or a continuous spark signal can be judged, the circuit breaker is cut off while an alarm or an alarm is controlled according to a judging result, and compared with the prior art, the photoelectric sensor is arranged in the cabinet body to monitor fire signals, and the monitoring precision is higher. The photoelectric sensor monitors the abnormality of the copper bar or the cable lap joint of the switch from time to time, so that the installation is convenient, and the efficiency and the safety of the construction of a power distribution system are improved.
The monitoring system comprises a plurality of monitoring devices, an industrial personal computer, a display screen and an audible and visual alarm module, wherein the audible and visual alarm module is used for displaying alarm signals through the display screen and sending out alarm signals through the audible and visual alarm module, so that monitoring personnel in a monitoring room can intuitively know the state of the corresponding low-voltage switch cabinet.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic diagram of a monitoring device of the present utility model;
FIG. 2 is a schematic diagram of a power module of the monitoring device of the present utility model;
fig. 3 is a schematic diagram of the monitoring system of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
In order to solve the technical problem that instantaneous sparks which are generated by a switching device and do not cause fire disaster can not be pre-alarmed in the prior art, the utility model provides a low-voltage switch cabinet monitoring device, which is shown in figure 1 and comprises a controller, a photoelectric sensor, a clock module, a communication module and a circuit breaker; the circuit breaker is provided with a shunt release and is arranged at the outlet of the low-voltage switch cabinet; the photoelectric sensor, the clock module and the communication module are respectively connected with a controller, and the controller is connected with a shunt release of the circuit breaker;
the photoelectric sensor is arranged near the lap joint position of the switch copper bar or the cable in the low-voltage switch cabinet and is used for monitoring whether the lap joint position of the switch copper bar or the cable generates an optical signal or not and transmitting the signal acquired by monitoring to the controller; the clock module is used for providing a clock source for the controller; the controller is used for comparing the duration of the optical signal collected by the photoelectric sensor with a set time threshold value, judging whether the optical signal is one of an instantaneous spark signal, a continuous instantaneous spark signal and a continuous spark signal, and sending an alarm signal to a remote control center or sending the alarm signal to the remote control center and sending a control signal to a shunt release of the circuit breaker through the communication module according to the judging result, wherein the shunt release forcibly opens the circuit breaker according to the control signal sent by the controller.
The working principle of the monitoring device is as follows:
the photoelectric sensor in the low-voltage switch cabinet monitors whether spark signals are generated at the lap joint position of the switch copper bar or the cable in the low-voltage switch cabinet, if the spark signals are generated, the photoelectric sensor collects corresponding optical signals and transmits the optical signals to the controller, the controller judges whether the duration of the corresponding optical signals is one of instantaneous spark signals, continuous instantaneous spark signals and continuous spark signals through comparison with a preset time threshold value, if the duration of the corresponding optical signals is smaller than the first time threshold value, the controller judges that the optical signals are instantaneous spark signals, and the controller sends alarm signals to a remote control center through the communication module.
If the optical signals collected in the second time threshold are discontinuous and the duration time of each time is smaller than the first time threshold, the continuous instant spark signals are judged, and if the duration time of the corresponding optical signals is larger than the third time threshold, the continuous spark signals are judged. When the continuous instantaneous spark signal or the continuous spark signal is judged, the controller sends an alarm signal to the remote control center through the communication module, and simultaneously sends a control signal to control the shunt release, and the shunt release forcibly cuts off the circuit breaker so as to cut off an external load of the low-voltage switch cabinet. The first time threshold is smaller than the second time threshold, and the first time threshold is smaller than the third time threshold.
For different switch copper bars or cable lap joint positions in the low-voltage switch cabinet, a plurality of photoelectric sensors can be arranged, and the plurality of photoelectric sensors are respectively connected with different interfaces of the controller. The control signal with the interface sent by the controller can position the optical signal detected by which photoelectric sensor, and then position the position in the low-voltage switch cabinet where the optical signal is specifically generated.
The communication module performs data transmission in a wired and wireless mode. The communication module can select to transmit data in a mode of an optical cable, or select the 4G/5G module and the WIFI module to transmit data.
As shown in fig. 2, the monitoring device further comprises a power module, the power module comprises a rechargeable storage battery and a power control circuit, the rechargeable storage battery is respectively connected with the power control circuit and the controller and used for providing working power for the device, and the power control circuit is connected with a power line in the low-voltage switch cabinet and used for charging the rechargeable storage battery when the electric quantity of the storage battery is insufficient. The power supply module fully utilizes the power supply circuit in the low-voltage switch cabinet to charge, improves the endurance capacity of the power supply module, realizes continuous monitoring and driving protection for the monitoring device for 24 hours, and meanwhile, the rechargeable storage battery has the power storage capacity, does not influence the work of the monitoring device under the condition of power failure, and can monitor the operation condition of the lap joint position of the switch copper bar or the cable in the low-voltage switch cabinet in real time.
The device also comprises an output voltage conversion unit which is respectively connected with the rechargeable storage battery and the controller and is used for converting the voltage output by the rechargeable storage battery into power supply voltage suitable for the operation of the controller.
The power supply control circuit comprises a storage battery voltage acquisition unit, a control unit and a change-over switch; the storage battery voltage acquisition unit is respectively connected with the chargeable storage battery and the control unit, the control unit is connected with the change-over switch, and the change-over switch is respectively connected with the power supply circuit in the low-voltage switch cabinet and the chargeable storage battery;
the storage battery voltage acquisition unit is used for acquiring output voltage signals of the rechargeable storage battery and inputting the acquired signals to the control unit, and the control unit is used for comparing the voltage signals acquired by the storage battery voltage acquisition unit with a preset voltage threshold value and controlling the switching of the change-over switch according to a comparison result so as to realize connection between the opening or closing of a power supply circuit in the low-voltage switch cabinet and the rechargeable storage battery. The power supply control circuit can charge or not charge according to the requirement of the rechargeable storage battery, and the service life of the rechargeable storage battery is prolonged.
The power module further comprises an input voltage conversion unit which is respectively connected with the power line and the change-over switch in the low-voltage switch cabinet and used for converting a voltage signal output by the power line in the low-voltage switch cabinet into a voltage suitable for charging the rechargeable storage battery. The input voltage conversion unit comprises a voltage conversion chip for converting AC220V into DC 5V.
As shown in fig. 3, the low-voltage switch cabinet monitoring system comprises a plurality of monitoring devices, an industrial personal computer, a display screen and an audible and visual alarm module; the industrial personal computer, the display screen and the audible and visual alarm module are arranged in the monitoring room; each monitoring device is provided with a unique ID number;
the industrial personal computer is respectively connected with the communication modules, the display screens and the audible and visual alarm modules of the monitoring devices, and is used for receiving the alarm signals transmitted by the monitoring devices, displaying the transmitted alarm signals through the display screens and controlling the audible and visual alarm modules to send out audible and visual alarm signals.
The monitoring device provided by the utility model displays the alarm signal through the display screen and sends the alarm signal through the audible and visual alarm module, so that monitoring personnel in a monitoring room can intuitively know the state of the corresponding low-voltage switch cabinet. The corresponding low-voltage switch cabinet is identified through the corresponding ID number, and the position of the specific optical signal generated in the low-voltage switch cabinet is identified through the interface of the optical signal received by the generating controller, so that accurate positioning is realized. The alarm signal comprises two types, wherein one type is an alarm signal type for generating an instantaneous spark signal and the other type is an alarm signal type for generating a continuous instantaneous spark signal or a continuous spark signal, when the alarm signal prompts the generation of the instantaneous spark in the low-voltage switch cabinet, a monitoring person can be prompted to check the corresponding lap joint position of the switch copper bar or the cable, if necessary, the maintenance is carried out, and if the alarm signal type for generating the continuous instantaneous spark signal or the continuous spark signal is the alarm signal type for generating the continuous instantaneous spark signal or the continuous spark signal, the monitoring person needs to report for the maintenance. The ID number may be provided by an RFID electronic tag, which is known in the art and will not be described in detail herein.
The monitoring system also comprises a data transmission unit DTU, wherein the data transmission unit DTU is used for sending the alarm short message to a mobile phone of a monitoring person in a GPRS communication mode. The system is notified to specific responsible personnel, and the effectiveness and timeliness of the system operation are improved.
Those of ordinary skill in the art will appreciate that the elements of the examples described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the elements of the examples have been described generally in terms of functionality in the foregoing description to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present utility model.
In the embodiments provided in the present utility model, it should be understood that the division of the units is merely a logic function division, and there may be other division manners in actual implementation, for example, multiple units may be combined into one unit, one unit may be split into multiple units, or some features may be omitted.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.
Claims (9)
1. A low-voltage switch cabinet monitoring device is characterized in that: the device comprises a controller, a photoelectric sensor, a clock module, a communication module and a circuit breaker; the circuit breaker is provided with a shunt release and is arranged at the outlet of the low-voltage switch cabinet; the photoelectric sensor, the clock module and the communication module are respectively connected with a controller, and the controller is connected with a shunt release of the circuit breaker;
the photoelectric sensor is arranged near the lap joint position of the switch copper bar or the cable in the low-voltage switch cabinet, and is used for monitoring whether the lap joint position of the switch copper bar or the cable generates an optical signal or not and transmitting the signal acquired by monitoring to the controller; the clock module is used for providing a clock source for the controller; the controller is used for judging whether the light signal is one of an instantaneous spark signal, a continuous instantaneous spark signal and a continuous spark signal according to the comparison of the duration time of the light signal acquired by the photoelectric sensor and a set time threshold value, sending an alarm signal to a remote control center or sending a control signal to a shunt release of the circuit breaker according to a judging result, and forcibly opening the circuit breaker according to the control signal sent by the controller.
2. The low voltage switchgear monitoring device of claim 1 wherein: the photoelectric sensors are arranged in a plurality, and the photoelectric sensors are respectively connected with different interfaces of the controller.
3. The low voltage switchgear monitoring device of claim 1 wherein: the communication module performs data transmission in a wired and wireless mode.
4. The low voltage switchgear monitoring device of claim 1 wherein: the device also comprises a power supply module, wherein the power supply module comprises a rechargeable storage battery and a power supply control circuit, the rechargeable storage battery is respectively connected with the power supply control circuit and the controller and used for providing working power for the device, and the power supply control circuit is connected with a power supply circuit in the low-voltage switch cabinet and used for charging the rechargeable storage battery when the electric quantity of the storage battery is insufficient.
5. The low voltage switchgear monitoring device of claim 4 wherein: the device also comprises an output voltage conversion unit which is respectively connected with the rechargeable storage battery and the controller and used for converting the voltage output by the rechargeable storage battery into power supply voltage suitable for the operation of the controller.
6. The low voltage switchgear monitoring device of claim 4 wherein: the power supply control circuit comprises a storage battery voltage acquisition unit, a control unit and a change-over switch; the storage battery voltage acquisition unit is respectively connected with the rechargeable storage battery and the control unit, the control unit is connected with the change-over switch, and the change-over switch is respectively connected with a power line in the low-voltage switch cabinet and the rechargeable storage battery;
the storage battery voltage acquisition unit is used for acquiring output voltage signals of the rechargeable storage battery and inputting the acquired signals to the control unit, and the control unit is used for comparing the voltage signals acquired by the storage battery voltage acquisition unit with a preset voltage threshold value and controlling the switching of the change-over switch according to a comparison result so as to realize connection between the opening or closing of a power supply circuit in the low-voltage switch cabinet and the rechargeable storage battery.
7. The low voltage switchgear monitoring device of claim 4 wherein: the low-voltage switch cabinet also comprises an input voltage conversion unit which is respectively connected with the power supply line and the change-over switch in the low-voltage switch cabinet and used for converting a voltage signal output by the power supply line in the low-voltage switch cabinet into a voltage suitable for charging the rechargeable storage battery.
8. A low-voltage switch cabinet monitoring system is characterized in that: comprises a plurality of monitoring devices, an industrial personal computer, a display screen and an audible and visual alarm module which are defined in any one of claims 1-6; the industrial personal computer, the display screen and the audible and visual alarm module are arranged in the monitoring room; each monitoring device is provided with a unique ID number;
the industrial personal computer is respectively connected with the communication modules, the display screens and the audible and visual alarm modules of the monitoring devices, and is used for receiving the alarm signals transmitted by the monitoring devices, displaying the transmitted alarm signals through the display screens and controlling the audible and visual alarm modules to send out audible and visual alarm signals.
9. The low voltage switchgear monitoring system of claim 8, wherein: the system also comprises a data transmission unit DTU, wherein the data transmission unit DTU is used for sending the alarm short message to monitoring personnel in a GPRS communication mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223116526.5U CN220043055U (en) | 2022-11-23 | 2022-11-23 | Low-voltage switch cabinet monitoring device and monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223116526.5U CN220043055U (en) | 2022-11-23 | 2022-11-23 | Low-voltage switch cabinet monitoring device and monitoring system |
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| CN220043055U true CN220043055U (en) | 2023-11-17 |
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| CN202223116526.5U Active CN220043055U (en) | 2022-11-23 | 2022-11-23 | Low-voltage switch cabinet monitoring device and monitoring system |
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