KR102659709B1 - System for monitoring deterioration of switchgear(high-voltage switchgear, low-voltage switchgear, motor control board, distributing board) and detecting abnormal operation of internal sensors of the switchgear - Google Patents

Abstract

A system for monitoring deterioration of a switchboard (high-voltage panel, low-voltage panel, motor control panel, distribution board) and detecting abnormal operation of an internal sensor of the switchboard is disclosed. The disclosed system includes a plurality of internal sensors that sense internal environmental values of the switchboard, at least one external sensor that senses external environmental values of the switchboard, and monitoring deterioration of the switchboard based on the internal environmental values, and a processor device that determines whether some of the internal sensors among the plurality of internal sensors are operating abnormally based on the internal environmental value and the external environmental value, wherein the plurality of internal sensors are located on the surface of the busbar installed inside the distribution board. An infrared temperature sensor that senses a temperature value, an internal temperature sensor that senses an internal temperature value of the switchboard, an internal humidity sensor that senses an internal humidity value of the switchboard, and a partial It includes a partial discharge sensor that senses discharge, and the processor device includes a first surface temperature value sensed at a first time point among the surface temperature values and a second surface temperature value sensed at a second time point after the first time point. A surface temperature difference value, which is the difference value of , and an external environment difference value, which is the difference value between the first external environmental value sensed at the first time point and the second external environmental value sensed at the second time point among the external environmental values, The infrared temperature among the plurality of internal sensors is based on an internal temperature difference value that is the difference between the second internal temperature value sensed at the second time point and the third internal temperature value sensed at a third time point after the second time point. Determine whether the sensor and the internal temperature sensor are operating abnormally.

Description

A system that monitors the deterioration of the switchgear (high-voltage panel, low-voltage panel, motor control panel, distribution board) and detects abnormal operation of the internal sensor of the switchgear {System for monitoring deterioration of switchgear (high-voltage switchgear, low-voltage switchgear, motor) control board, distributing board) and detecting abnormal operation of internal sensors of the switchgear}

Embodiments of the present invention relate to a system that monitors deterioration of a switchboard (high-voltage panel, low-voltage panel, motor control panel, distribution panel) and detects abnormal operation of an internal sensor of the switchboard.

A switchboard is a device that converts high-voltage power from a wide range of power customers, such as residential areas, buildings, schools, factories, ports, airports, water and wastewater treatment plants, substations, heavy industrial plants, subways, and steel mills, into low-voltage power and supplies it to various equipment.

Meanwhile, most power accidents in power facilities that make up switchboards are caused by explosions and fires in the facilities due to overheating. In particular, power accidents due to overheating occur in all types of contacts and connectors of power equipment that make up power facilities, and the main causes are deterioration (aging), corrosion, loosening, overload, or fine dust. Such power accidents due to overheating cause abnormal overheating before the accident occurs. Therefore, there is a need to develop technology to prevent fires in the switchboard by installing various sensors in the switchboard.

In addition, if an abnormal operation occurs in a sensor installed in the switchboard, signs of fire cannot be accurately detected. Therefore, there is also a need to develop technology to accurately detect abnormal operation of sensors installed in switchboards.

The purpose of the present invention is to provide a system for preventing internal fires by accurately detecting deterioration occurring in a switchboard (high-voltage panel, low-voltage panel, motor control panel, distribution board, hereinafter, “distribution board”).

Additionally, the purpose of the present invention is to provide a switchboard monitoring system that accurately determines whether a sensor used to detect deterioration of the switchboard is operating abnormally.

The objects of the present invention are not limited to the objects mentioned above, and other objects and advantages of the present invention that are not mentioned can be understood by the following description and will be more clearly understood by the examples of the present invention. Additionally, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof indicated in the claims.

In order to achieve the above object, a switchboard monitoring system according to an embodiment of the present invention includes a plurality of internal sensors that sense internal environmental values of the switchboard, and at least one external sensor that senses external environmental values of the switchboard, A processor device that monitors deterioration of the switchboard based on the internal environmental value and determines whether some of the internal sensors among the plurality of internal sensors are operating abnormally based on the internal environmental value and the external environmental value, The plurality of internal sensors includes an infrared temperature sensor that senses the surface temperature value of a busbar installed inside the distribution board, an internal temperature sensor that senses an internal temperature value of the distribution board, and an internal temperature sensor that senses an internal humidity value of the distribution board. It includes a humidity sensor and a partial discharge sensor that senses partial discharge by receiving electromagnetic waves generated inside the switchboard, and the processor device includes a first surface temperature value sensed at a first time among the surface temperature values and the A surface temperature difference value, which is the difference value between the second surface temperature value sensed at a second time point after the first time point, and the first external environmental value sensed at the first time point and the external environmental value sensed at the second time point among the external environmental values. An external environment difference value, which is the difference value between the second external environmental value, and a difference value between the second internal temperature value sensed at the second time point and the third internal temperature value sensed at a third time point after the second time point. Based on the internal temperature difference value, it is determined whether the infrared temperature sensor and the internal temperature sensor among the plurality of internal sensors are operating abnormally.

According to the present invention, it is possible to accurately detect deterioration occurring in a switchboard and prevent a fire in the switchboard.

Additionally, according to the present invention, it is possible to accurately determine whether a sensor used to detect deterioration of a switchboard is operating abnormally.

In addition, the effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a diagram illustrating the schematic configuration of a monitoring system according to an embodiment of the present invention.
Figure 2 is a diagram showing an example of a plurality of internal sensors used in the present invention.
Figure 3 is a diagram showing a partial discharge sensor being installed according to an embodiment of the present invention.
4 to 6 are flowcharts of a method for determining abnormal operation of an internal sensor according to an embodiment of the present invention.
FIG. 7 is a diagram illustrating the concept of determining whether a partial discharge sensor among a plurality of internal sensors performs an abnormal operation according to an embodiment of the present invention.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. While describing each drawing, similar reference numerals are used for similar components.

Terms such as “first”, “second”, etc. may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. The term “and/or” includes any of a plurality of related stated items or a combination of a plurality of related stated items.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

The terms used in this specification are merely used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the attached drawings.

Figure 1 is a diagram showing the schematic configuration of a monitoring system 1 according to an embodiment of the present invention.

Referring to FIG. 1, the monitoring system 1 includes a switchboard (high-voltage panel, low-voltage panel, motor control panel, distribution board, hereinafter “distribution board”) 10, a plurality of internal sensors 20, and at least one external sensor 30. , may include a control device 40 and a management server 50. A plurality of internal sensors 20 and at least one external sensor 30 may constitute switchboard sensors 20 and 30.

The switchboard 10 may be installed indoors or outdoors.

The plurality of internal sensors 20 can sense internal environmental values of the distribution board 10.

Figure 2 is a diagram showing an embodiment of a plurality of internal sensors 20 used in the present invention.

Referring to FIG. 2, the plurality of internal sensors 20 may include an infrared temperature sensor 21, an internal temperature sensor 22, an internal humidity sensor 23, a partial discharge sensor 24, and a vibration sensor 25. You can. However, the present invention is not limited to this, and the plurality of internal sensors 20 may further include various additional sensors.

The infrared temperature sensor 21 can sense the surface temperature value of a bus bar installed inside the distribution board 10. The infrared temperature sensor 21 can be installed inside the switchboard 10 and can sense the surface temperature value of the busbar in a non-contact manner by emitting and receiving infrared rays.

According to the embodiment, the busbar may be a main RST busbar, and the infrared temperature sensor 21 includes an R-phase infrared temperature sensor that senses the surface temperature value of the R-phase busbar and a surface temperature value of the S-phase busbar. It may include an S-phase infrared temperature sensor for sensing and a T-phase infrared temperature sensor for sensing the surface temperature value of the T-phase busbar.

The internal temperature sensor 22 can sense the internal temperature value of the switchboard 10. For this purpose, the internal temperature sensor 22 may be installed inside the distribution board 10.

The internal humidity sensor 23 can sense the internal humidity value of the switchboard 10. For this purpose, the internal humidity sensor 23 may be installed inside the distribution board 10.

Meanwhile, the internal temperature sensor 22 and the internal humidity sensor 23 may be configured as one integrated sensor.

The partial discharge sensor 24 can sense partial discharge (arc discharge, corona discharge, etc.) occurring inside the switchboard 10 by receiving electromagnetic waves generated inside the switchboard 10. For example, the partial discharge sensor 24 may sense partial discharge by detecting excessive ground voltage generated on the metal surface due to electromagnetic waves.

According to an embodiment, the partial discharge sensor 24 may be a TEV sensor (Transient Earth Voltage Sensor) that can sense partial discharge by detecting a transient ground voltage generated on a metal surface due to electromagnetic waves. Specifically, the electric field induced by partial discharge has a frequency component of 5 MHz to 30 MHz, and the TEV sensor detects the partial discharge by detecting the electric field induced by impulse, that is, EM (Electro Magnetic).

Figure 3 is a diagram showing the partial discharge sensor 24 being installed according to an embodiment of the present invention.

Referring to FIG. 3, the partial discharge sensor 24 may be magnetically attached to the outside of the door 11 of the switchboard 10. At this time, in order to more accurately sense the partial discharge, the manager of the switchboard 10 selects a first point 11a outside the door 11 corresponding to a point where the intensity of electromagnetic waves is high, that is, a point where partial discharge is likely to occur. ) must be attached to the

As an example, the partial discharge sensor 24 may use a known sensor. Hereinafter, detailed description of the partial discharge sensor 24 will be omitted.

The vibration sensor 25 can sense vibration occurring in the switchboard 10. As an example, the vibration sensor 25 may be magnetically attached to the inner wall of the switchboard 10.

Referring again to FIG. 1, at least one external sensor 30 may sense external environmental values of the distribution board 10.

According to the embodiment, at least one external sensor 30 may include an external temperature sensor that senses an external temperature value of the distribution board 10. Additionally, when the switchboard 10 is installed outdoors, at least one external sensor 30 may further include a solar radiation sensor. That is, the external environment value may be an external temperature value and/or a solar radiation value. However, the present invention is not limited to this, and at least one external sensor 30 may further include various additional sensors.

The control device 40 may be installed inside or outside the switchboard 10. The control device 40 can control the switchboard sensors 20 and 30, receive sensing values sensed by the switchboard sensors 20 and 30, and detect deterioration of the switchboard 10 based on the received sensing values. Data processing operations related to can be performed. For this purpose, the control device 40 may include a communication unit and a control unit.

The communication unit of the control device 40 may be connected to a plurality of internal sensors 20 and at least one external sensor 30 by wired or wireless communication, and in addition, a management server ( 50) can be connected by wired or wireless communication. To this end, the communication unit of the control device 40 may include wired or wireless communication means.

The control unit of the control device 40 is a processor-based module, including application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), and field programmable gate arrays (FPGAs). ), processors, micro-controllers, and microprocessors may be implemented as at least one physical element.

The management server 50 is a device that manages the distribution board 10 and may include a communication unit and a control unit. The communication unit of the management server 50 may include a wired or wireless communication module. The control unit of the management server 50 is a processor-based device and may be implemented with at least one physical element selected from ASICs, DSPs, DSPDs, PLDs, FPGAs, processors, microcontrollers, and microprocessors. That is, the management server 50 may be a processor device.

The management server 50 may determine and monitor deterioration of the switchboard 10 based on the sensing values of the plurality of internal sensors 20 received through the control device 40.

The management server 50 may include a programmable logic controller (PLC) and a display unit. The PLC may additionally include an analog input module, control the internal sensor 20 and the external sensor 30 through a human machine interface (HMI), and provide deterioration information of the monitored switchboard 10. can be displayed.

According to the embodiment, the management server 50 calculates the first duration of time in which the surface temperature of the busbar is high based on the sensed surface temperature value of the busbar, and determines the sensed internal temperature of the switchboard 10. Based on the value, the second duration time of the high internal temperature of the switchboard 10 is calculated, and the number of times condensation occurs inside the switchboard 10 is calculated based on the sensed internal humidity value of the switchboard 10, , Based on the intensity of the sensed electromagnetic wave, the accumulated number of partial discharges occurring inside the switchboard 10 and the accumulated number of vibrations above the threshold value can be calculated based on the sensed vibration value. In addition, the management server 50 may calculate and monitor the degree of deterioration of the switchboard 10 by combining the first duration time, the second duration time, the number of condensation occurrences, the accumulated number of partial discharges, and the accumulated number of vibrations.

According to another embodiment, the management server 50 may set the upper limit temperature (for example, 50°C) of the infrared temperature sensor 21, the internal temperature sensor 22, etc., and the upper limit value of the number of partial discharge occurrences, The average temperature of the infrared temperature sensor 21 and the average occurrence of partial discharge can be calculated. At this time, if the average temperature is higher than the upper limit temperature, a first alarm can be provided to the manager, and if the average value of partial discharge occurrence is higher than the upper limit value or partial discharges occur more than 5 times per month, a second alarm can be provided to the manager.

In addition, the management server 50 determines whether some of the internal sensors 20 among the plurality of internal sensors 20 are operating abnormally based on the sensing values of the distribution board sensors 20 and 30 received through the control device 40. You can judge. At this time, if an abnormal operation occurs in some of the internal sensors 20, a third alarm may be provided to the manager.

Hereinafter, the operation of determining whether some of the internal sensors 20 among the plurality of internal sensors 20 are operating abnormally will be described in more detail with reference to FIGS. 4 to 7.

FIG. 4 is a flowchart illustrating a method for determining abnormal operation of the internal sensor 20 according to an embodiment of the present invention.

At this time, the above method may be performed in the control device 40 or the management server 50. That is, the above-described method can be performed on a processor device.

Meanwhile, in FIG. 4, since the external sensor 30 is not affected by the heat generated inside the switchboard 10, it is assumed that the external sensor 30 is not operating abnormally.

Hereinafter, the process performed at each step will be described in detail.

In step S102, the processor device may obtain the surface temperature value, external environmental value, and internal temperature value sensed at each of the first, second, and third time points.

As described above, the surface temperature value, external environment value, internal humidity value, and internal temperature value can be sensed by the infrared temperature sensor 21, external sensor 30, and internal temperature sensor 22 and transmitted to the processor device. there is. And, the external environment value may be at least one of an external temperature value and a solar radiation value.

In step S104, the processor device determines a surface temperature difference value between the first and second time points, an external environment difference value between the first and second time points, and an internal humidity difference value between the first and second time points. And, the internal temperature difference between the second and third time points can be calculated. Here, the first, second, and third times may be times that arrive periodically or sequentially.

Specifically, the surface temperature difference value is the difference between the first surface temperature value sensed by the infrared temperature sensor 21 at a first time point and the second surface temperature value sensed by the infrared temperature sensor 21 at a second time point. It can be a value. The external environment difference value may be a difference value between a first external environmental value sensed by the external sensor 30 at a first time point and a second external environmental value sensed by the external sensor 30 at a second time point. The internal humidity difference value may be the difference between the first internal humidity value sensed by the internal humidity sensor 23 at a first time point and the second internal temperature value sensed by the internal humidity sensor 23 at a second time point. The internal temperature difference value may be the difference between the second internal temperature value sensed by the internal temperature sensor 22 at a second time point and the third internal temperature value sensed by the internal temperature sensor 22 at a third time point.

Meanwhile, the surface temperature value of the busbar may be the average value of the surface temperature values of the R-phase, S-phase, and R-phase busbars, or may be the maximum value.

In step S106, the processor device may determine whether the internal temperature difference value is included in a preset critical internal temperature value range.

Here, the critical internal temperature value section can be used to determine whether the third internal temperature value has changed more or less than the second internal temperature value. That is, in step S106, the processor device may determine whether the second internal temperature value and the third internal temperature value are substantially the same through the critical internal temperature value section. For example, the critical internal temperature range can be set to -0.5°C to 0.5°C.

If it is determined that the internal temperature difference value is included in the critical internal temperature value range, step group A can be performed, and if it is determined that the internal temperature difference value is not included in the critical internal temperature value range, step group B can be performed. You can.

Hereinafter, step group A and step group B will be described in more detail.

Figure 5 is a diagram illustrating a flow chart of step group A, according to one embodiment of the present invention.

In step S108, the processor device may determine whether the external environment difference value is included in a preset critical external environment value interval.

The critical external environmental value section can be used to determine whether the second external environmental value has changed more or less than the first external environmental value. That is, in step S108, the processor device may determine whether the first external environment value and the second external environment value are substantially the same through the critical external environment value section. For example, when the external environmental value is an external temperature value, the critical external environmental value range may be set to -0.5°C to 0.5°C.

If it is determined that the external environment difference value is not included in the critical external environment value section, in step S110, the processor device may determine that the internal temperature sensor 22 is operating abnormally.

Specifically, the external environment difference value between the first and second time points affects the internal temperature difference value between the second and third time points. For example, in a situation where the switchboard 10 is installed outside, if the solar radiation difference value between the first and second viewpoints increases, the internal temperature difference value between the second and third viewpoints must also increase. However, even though the external environmental value at the second time point is greater than the external environmental value at the first time point, if the internal temperature value at the third time point and the internal temperature value at the second time point are substantially the same, a sensing error in the internal temperature value occurs. It can be judged that it has occurred. Accordingly, the processor device determines that the internal temperature difference value between the second and third time points is included in the critical internal temperature value interval, and the external environment difference value between the first and second time points is not included in the critical external environment value interval. In this case, it may be determined that the internal temperature sensor 22 is operating abnormally regardless of the surface temperature difference value of the busbar between the first and second time points.

Conversely, if it is determined that the external environment difference value is included in the critical external environmental value section, in step S112, the processor device determines whether the surface temperature difference value is included in the preset critical surface temperature value section. can do.

The critical surface temperature value section can be used to determine whether the second surface temperature value has changed more or less than the first surface temperature value. That is, in step S112, the processor device may determine whether the first surface temperature value and the second surface temperature value are substantially the same through the critical surface temperature value section. For example, the surface temperature range can be set to -0.5°C to 0.5°C.

If it is determined that the surface temperature difference value is included in the critical surface temperature value section, in step S116, the processor device determines that both the internal temperature sensor 22 and the infrared temperature sensor 21 are operating normally. You can.

Specifically, the surface temperature difference value of the busbar between the first and second viewpoints affects the internal temperature difference value between the second and third viewpoints. That is, if the surface temperature difference value of the busbar between the first and second viewpoints increases, the internal temperature difference value between the second and third viewpoints must also increase.

At this time, in a situation where the external environmental value at the second time point and the external environmental value at the first time point are substantially the same, the surface temperature value of the busbar at the second time point and the surface temperature value of the busbar at the first time point are substantially the same. And, if the internal temperature value at the third time point and the internal temperature value at the second time point are substantially the same, the external environmental value and the surface temperature value of the busbar do not affect the internal temperature value, so a sensing error does not occur. It can be understood that it is not. Accordingly, the internal temperature difference value between the second and third time points is included in the critical internal temperature value interval, the external environmental difference value between the first and second time points is included in the critical external environmental value interval, and the first and If the difference in surface temperature of the busbar between two points in time is included in the critical surface temperature range, the processor device may determine that the internal temperature sensor 22 and the infrared temperature sensor 21 are operating normally.

Conversely, if it is determined that the surface temperature difference value is not included in the critical surface temperature value section, in step S116, the processor device determines that any one of the internal temperature sensor 22 and the infrared temperature sensor 21 is abnormal. It can be judged that it is working.

Specifically, in a situation where the external environmental value at the second time point and the external environmental value at the first time point are substantially the same, if the surface temperature value of the busbar at the second time point is greater than the surface temperature value of the busbar at the first time point, The internal temperature value at time 3 must be greater than the internal temperature value at time 2. However, even though the surface temperature value of the busbar at the second time point is greater than the surface temperature value of the busbar at the first time point, if the internal temperature value at the third time point and the internal temperature value at the second time point are determined to be substantially the same, , this can be understood as a sensing error in the internal temperature value or a sensing error in the surface temperature value. Accordingly, the internal temperature difference value between the second and third time points is included in the critical internal temperature value interval, and the external environment difference value between the first and second time points is included in the critical external environment value interval, but the first and third time points are included in the critical internal temperature value interval. If the surface temperature difference value of the busbar between two points in time is not included in the critical surface temperature value range, the processor device may determine that either the infrared temperature sensor 21 or the internal temperature sensor 22 is operating abnormally. there is.

Meanwhile, although not shown in FIG. 5, according to the embodiment, the processor device operates either the internal temperature sensor 22 or the infrared temperature sensor 21 based on the internal humidity values at the first and second times. sensor can be judged. Here, the internal humidity values at the first and second time points may be obtained in step S102.

Specifically, when the humidity in the space where infrared rays are emitted is low, the infrared temperature sensor 21 accurately senses the surface temperature. However, when the humidity in the space where infrared rays are emitted is high, the infrared rays are scattered by water particles, and as a result, the infrared temperature sensor 21 cannot accurately sense the surface temperature and causes a sensing error. Therefore, in a state in which one of the internal temperature sensor 22 and the infrared temperature sensor 21 is determined to be operating abnormally, the internal humidity value (for example, the average internal humidity value) at the first and second time points is If it exceeds a preset threshold humidity value (for example, 90%), the processor device may determine that one of the abnormally operating sensors is the infrared temperature sensor 21.

Figure 6 is a diagram illustrating a flow diagram of step group B, according to an embodiment of the present invention.

In step S118, the processor device may determine whether the external environment difference value is included in the critical external environment value section.

If it is determined that the external environment difference value is not included in the critical external environment value section, in step S120, the processor device determines that both the internal temperature sensor 22 and the infrared temperature sensor 21 are operating normally. can do.

Specifically, if the external environmental value at the second time point is greater than the external environmental value at the first time point, the internal temperature value at the third time point must be greater than the internal temperature value at the second time point based on this. Therefore, it is determined that the internal temperature difference between the second and third time points is not included in the critical internal temperature value range, and the external environment difference value between the first and second time points is not included in the critical external environment value range. In this case, the processor device determines that both the internal temperature sensor 22 and the infrared temperature sensor 21 are operating normally regardless of whether the surface temperature difference value between the first and second time points is included in the critical surface temperature value range. can do.

Conversely, if it is determined that the external environment difference value is included in the critical external environment value section, in step S122, the processor device may determine whether the surface temperature difference value is included in the critical surface temperature value section.

If it is determined that the surface temperature difference value is not included in the critical surface temperature range, in step S120, the processor device determines that both the internal temperature sensor 22 and the infrared temperature sensor 21 are operating normally. can do.

Specifically, if the surface temperature value of the busbar at the second time point is greater than the surface temperature value of the busbar at the first time point, based on this, the internal temperature value at the third time point must be greater than the internal temperature value at the second time point. Therefore, the internal temperature difference value between the second and third time points is not included in the critical internal temperature value section, the external environment difference value between the first and second time points is included in the critical external environment value section, and the first and third time points are not included in the critical internal temperature value section. If the surface temperature difference value of the busbar between the second time points is not included in the critical surface temperature value range, the processor device may determine that both the internal temperature sensor 22 and the infrared temperature sensor 21 are operating normally. .

Conversely, when it is determined that the external environment difference value is included in the critical external environmental value section and the surface temperature difference value is included in the critical external environmental value section, in step S124, the processor device uses the internal temperature sensor 22 and the infrared temperature sensor 21 may be determined to be operating abnormally.

Specifically, if the external environmental value at the second time point and the external environmental value at the first time point are substantially the same, and the surface temperature value of the busbar at the second time point and the surface temperature value of the busbar at the first time point are substantially the same, , the internal temperature value at the third time point and the internal temperature value at the second time point must be substantially the same. However, the surface temperature value of the busbar at the second time point is substantially the same as the surface temperature value of the busbar at the first time point, and the surface temperature value of the busbar at the second time point is the surface temperature value of the busbar at the first time point. Despite being substantially the same, if the internal temperature value at the third time point is greater than the internal temperature value at the second time point, this can be understood as a sensing error in the internal temperature value or a sensing error in the surface temperature value. You can. Therefore, the internal temperature difference value between the second and third time points is not included in the critical internal temperature value section, the external environment difference value between the first and second time points is included in the critical external environment value section, and the first and third time points are not included in the critical internal temperature value section. If the surface temperature difference value of the busbar between the second time points is not included in the critical surface temperature value section, the processor device determines that any one of the internal temperature sensor 22 and the infrared temperature sensor 21 is operating abnormally. You can judge.

Meanwhile, although not shown in FIG. 6, according to the embodiment, the processor device operates either the internal temperature sensor 22 or the infrared temperature sensor 21 based on the internal humidity values at the first and second times. sensor can be judged. That is, when the internal humidity value at the first and second time points exceeds the threshold humidity value, the processor device may determine that one sensor operating abnormally is the infrared temperature sensor 21. Since this is similar to the previously described description, redundant description will be omitted.

In short, according to an embodiment of the present invention, the processor device can determine whether some of the internal sensors 20 among the plurality of internal sensors 20 are operating abnormally based on internal environmental values and external environmental values. Accordingly, it is impossible to accurately detect signs of fire without error by checking in real time whether an abnormal operation occurs in the internal sensor 20 installed in the switchboard 10.

Hereinafter, the concept of determining whether the partial discharge sensor 24 is performing an abnormal operation will be described in more detail with reference to FIG. 7.

As described above in FIG. 3, the partial discharge sensor 24 may be magnetically attached at a first point 11a outside the door 11 of the switchboard 10. At this time, the processor device may determine whether the partial discharge sensor 24 deviates from the first point 11a and operates abnormally based on a change over time in the intensity of the electromagnetic wave generated in the distribution board 10.

Specifically, Figure 7 shows a simplified shape of electromagnetic waves according to the passage of time in a specific time section. Here, electromagnetic waves are received at the partial discharge sensor 24.

At this time, when the door 11 is opened, the physical distance between the electric device inside the switchboard 10 that emits electromagnetic waves and the partial discharge sensor 24 gradually increases. Additionally, when the door 11 is closed again, the physical distance between the electric device inside the switchboard 10 that emits electromagnetic waves and the partial discharge sensor 24 gradually decreases. Meanwhile, the manager of the switchboard 10 opens the door 10 of the switchboard 10, inspects and manages the switchboard 10, and then closes the door 10 of the switchboard 10.

Therefore, referring to FIG. 7, if the intensity of the electromagnetic wave decreases below the preset threshold intensity and then increases again above the threshold intensity, the processor device may determine that the door 11 of the switchboard 10 is opened and then closed again. there is.

At this time, the processor device can calculate a time point A when the intensity of the electromagnetic wave decreases and reaches the critical intensity, and a time point B when the intensity of the electromagnetic wave increases again and reaches the critical intensity.

Thereafter, the processor device calculates the first intensity of the electromagnetic wave at time C, which is earlier by a preset first time interval from time A, and the second intensity of the electromagnetic wave at time D, which is slower than the first time interval from time B. can do. At this time, time point C may be a time point before the door 11 is opened, and time point D may be a time point after the door 11 is opened and closed again.

Additionally, the processor device may determine whether the electromagnetic wave intensity difference, which is the difference between the second intensity of the electromagnetic wave and the first intensity of the electromagnetic wave, is included in the preset threshold section.

Here, the threshold section can be used to determine whether the second intensity has changed more or less than the first intensity. That is, the processor device can determine whether the first intensity and the second intensity are substantially the same through the threshold interval.

If the electromagnetic wave intensity difference is included in the threshold section ((a) of FIG. 7), the processor device may determine that the partial discharge sensor 24 is operating normally without leaving the first point 11a. Conversely, when the electromagnetic wave intensity difference is not included in the threshold section ((b) of FIG. 7), the processor device may determine that the second intensity is smaller than the first intensity, and thus the partial discharge sensor 24 may determine the first intensity. It may be determined that the operation is abnormal due to deviation from point 11a.

Specifically, when inspecting the switchboard 10, a manager may accidentally touch and move the partial discharge sensor 24 after closing the door 11. In this case, the partial discharge sensor 24 deviates from the first point 11a and partial discharge may not be accurately determined.

Accordingly, if the first intensity of the electromagnetic wave before opening the door 11 and the second intensity of the electromagnetic wave after closing the door 11 are substantially the same, the processor device may detect the partial discharge sensor 24 at the first point 11a. It can be determined that it is attached, and it can be determined that the partial discharge sensor 24 is operating normally. And, if the second intensity of the electromagnetic wave after closing the door 11 is greater than the first intensity of the electromagnetic wave before opening the door 11, the processor device predicts that the partial discharge sensor 24 will deviate from the first point 11a. It can be determined that the partial discharge sensor 24 is operating abnormally.

In summary, according to the present invention, it is possible to accurately detect deterioration occurring in the switchboard 10 and prevent a fire in the switchboard 10 in advance. In addition, according to the present invention, the deterioration of the switchboard 10 can be monitored without error by accurately determining whether the internal sensor 20 used to detect deterioration of the switchboard 10 is operating abnormally.

Additionally, embodiments of the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded on a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, etc., singly or in combination. Program instructions recorded on the medium may be those specifically designed and configured for the present invention, or may be known and usable by those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs and DVDs, and magnetic media such as floptical disks. -Includes optical media (magneto-optical) and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, etc. Examples of program instructions include machine language code, such as that produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter, etc. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of embodiments of the invention, and vice versa.

As described above, the present invention has been described with specific details such as specific components and limited embodiments and drawings, but this is only provided to aid the overall understanding of the present invention, and the present invention is not limited to the above embodiments. Various modifications and variations can be made from this description by those skilled in the art to which the present invention pertains. Accordingly, the spirit of the present invention should not be limited to the described embodiments, and the claims described below as well as all modifications that are equivalent or equivalent to the claims shall fall within the scope of the spirit of the present invention.

Claims (7)

In the monitoring system of the distribution panel (high-voltage panel, low-voltage panel, motor control panel, distribution panel),
A plurality of internal sensors that sense internal environmental values of the switchboard;
At least one external sensor that senses external environmental values of the switchboard; and
A processor device that monitors deterioration of the switchboard based on the internal environmental value and determines whether some of the internal sensors among the plurality of internal sensors are operating abnormally based on the internal environmental value and the external environmental value. ,
The plurality of internal sensors includes an infrared temperature sensor that senses the surface temperature value of a busbar installed inside the distribution board, an internal temperature sensor that senses an internal temperature value of the distribution board, and an internal temperature sensor that senses an internal humidity value of the distribution board. It includes a humidity sensor and a partial discharge sensor that senses partial discharge by receiving electromagnetic waves generated inside the switchboard,
The processor device includes a surface temperature difference value that is a difference value between a first surface temperature value sensed at a first time point among the surface temperature values and a second surface temperature value sensed at a second time point after the first time point, and the Among the external environmental values, an external environment difference value that is the difference between the first external environmental value sensed at the first time point and the second external environmental value sensed at the second time point, and the second internal temperature sensed at the second time point Based on the internal temperature difference value, which is the difference between the value and the third internal temperature value sensed at the third time point after the second time point, whether the infrared temperature sensor and the internal temperature sensor among the plurality of internal sensors are operating abnormally is determined. judging,
Monitoring system of switchboard (high-voltage panel, low-voltage panel, motor control panel, distribution board).
According to paragraph 1,
The processor device,
The internal temperature difference value is included in a preset critical internal temperature value range, the external environment difference value is included in a preset critical external environment value range, and the surface temperature difference value is included in a preset critical surface temperature value range. In this case, it is determined that the internal temperature sensor and the infrared temperature sensor are operating normally,
When the internal temperature difference value is included in the critical internal temperature value range, the external environment difference value is included in the critical external environment value range, and the surface temperature difference value is not included in the critical surface temperature value range, Determine that any one of the internal temperature sensor and the infrared temperature sensor is operating abnormally,
If the internal temperature difference value is included in the critical internal temperature value range and the external environment difference value is not included in the critical external environment value range, the processor device may detect the internal temperature sensor regardless of the surface temperature difference value. is judged to be operating abnormally,
Monitoring system of switchboard (high-voltage panel, low-voltage panel, motor control panel, distribution board).
According to paragraph 1,
The processor device,
The internal temperature difference value is not included in the preset critical internal temperature value range, the external environment difference value is not included in the preset critical external environmental value range, and the surface temperature difference value is not included in the preset critical surface temperature range. If included, it is determined that the internal temperature sensor and the infrared temperature sensor are operating normally,
When the internal temperature difference value is not included in the critical internal temperature value range, the external environment difference value is included in the critical external environment value range, and the surface temperature difference value is not included in the critical surface temperature value range. , determining that the internal temperature sensor and the infrared temperature sensor are operating normally,
The internal temperature difference value is not included in the critical internal temperature value range, the external environment difference value is not included in the critical external environment value range, and the surface temperature difference value is not included in the critical surface temperature value range. In this case, it is determined that the internal temperature sensor and the infrared temperature sensor are operating normally,
When the internal temperature difference value is not included in the critical internal temperature value range, the external environment difference value is included in the critical external environment value range, and the surface temperature difference value is not included in the critical surface temperature value range. , the processor device determines that one of the internal temperature sensor and the infrared temperature sensor is operating abnormally,
Monitoring system of switchboard (high-voltage panel, low-voltage panel, motor control panel, distribution board).
According to paragraph 2 or 3,
The processor device determines which sensor is operating abnormally based on the internal humidity values at the first and second times.
Monitoring system of switchboard (high-voltage panel, low-voltage panel, motor control panel, distribution board).
According to paragraph 4,
The processor device,
When the internal humidity value at the first and second time points exceeds a preset threshold humidity value, determining that the infrared temperature sensor is operating abnormally,
Monitoring system of switchboard (high-voltage panel, low-voltage panel, motor control panel, distribution board).
According to paragraph 1,
The partial discharge sensor is magnetically attached and installed at a first point outside the door of the switchboard,
The processor device determines whether the partial discharge sensor deviates from the first point and operates abnormally based on a change in the intensity of the electromagnetic wave over time.
Monitoring system of switchboard (high-voltage panel, low-voltage panel, motor control panel, distribution board).
According to clause 6,
The processor device,
If the intensity of the electromagnetic wave decreases below a preset threshold intensity and then increases again above the threshold intensity, determining that the door of the switchboard is opened and then closed again,
Calculating a time point A when the intensity of the electromagnetic wave decreases and reaches the critical intensity and a time point B when the intensity of the electromagnetic wave increases again to reach the critical intensity, respectively,
Calculating a first intensity of the electromagnetic wave at time C, which is earlier than the time point A by a preset first time interval, and a second intensity of the electromagnetic wave at time D, which is slower than the first time interval from the time point B, respectively,
When the first intensity of the electromagnetic wave and the second intensity of the electromagnetic wave are not included in a preset threshold section, determining that the partial discharge sensor deviates from the first point and operates abnormally,
Monitoring system of switchboard (high-voltage panel, low-voltage panel, motor control panel, distribution board).