KR101520758B1 - Switchgear having a function of diagnosing abnormality by analyzing temperature and current - Google Patents

Abstract

A switchgear having a function of diagnosing abnormality by analyzing temperature and through-current is disclosed. The switchgear according to an embodiment of the present invention comprises: an external wired temperature sensor module installed to an outside of the switchgear to sense the temperature, transmit by converting the value sensed into a first voltage value corresponding to the temperature sensed and has an unique address; an internal wireless temperature sensing module installed to at least one conductor connection area in the switchgear to sense the temperature, transmit by converting the value sensed into a first voltage value corresponding to the temperature sensed and has an unique address; a temperature converting module to receive the first voltage value from the external wired temperature sensor, receive the second voltage value form the internal wireless temperature sensor, and convert the first voltage value and the second voltage value received into corresponding external temperature and internal temperature respectively; a CT transformer installed to at least one conductor connection area in the switchgear for measuring operating current; a through-type transformer installed to secondary side of the CT transformer for measuring operating current to transfer operating current measured in the CT transformer for measuring operating current; and a disorder status analyzing module to analyze whether temperature change per hour, that is, a difference between the internal temperature which is converted in the temperature converting module and the external temperature which is converted in the temperature converting module increases abruptly compared with a change per hour of operating current transferred through the through type transformer.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electrical switchboard having an abnormality diagnosis function of temperature and current analysis,

More particularly, the present invention relates to an ASSEMBLY with an anomaly diagnosis function of a temperature and a current analysis method. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ASSEMBLY, and more particularly, to an ASSEMBLY with an anomaly diagnosis function.

The switchboard is installed in the power supply and performs functions such as voltage distribution, supply, transforming, and shutdown.

There are many wiring and electric devices installed in the switchboard and high voltage current flows, which often leads to electric accidents and fire.

The temperature of the switchboard is particularly important because the contact resistance increases in a loosened conductor contact area and a current flows through an increased resistance, which causes a sudden rise in temperature at a conductor connecting part due to heat generation, resulting in a fire. The temperature rise due to the loosening of the contact portion is very dangerous because it causes an arc discharge inside the switchboard.

The first and most common way to detect this problem is to measure the temperature at the conductor connection site. First, the rise in temperature leads to ultraviolet radiation, arc discharge, and fire.

Open No. 10-2010-0025937 discloses a technique for detecting a risk in advance through temperature sensing inside the switchboard. And the abnormal state of the switchboard is judged by the temperature rise inside the switchboard.

Korean Patent Publication No. 10-1194021 is also configured to detect the temperature of various electrical equipment inside the switchboard in multiple senses and to determine the risk.

However, all of the conventional switchboards are configured to monitor only the temperature rise inside the switchboard, and no consideration is given to the change of the current flowing in accordance with the load increase and the temperature change outside the switchboard. The temperature change inside the switchboard can also be caused by the increase of the energizing current and the change of the external temperature, but it only judges the danger through the internal temperature only.

There is a possibility that the temperature rises due to a high temperature in summer or other reasons, but there is a problem that a conventional dangerous state detection or alarm sometimes occurs in a conventional power distribution board which does not take this into consideration.

Since the switchboard can not be visually checked or monitored by the user at all times, it is mainly configured to detect and detect the danger through the sensor. Due to such a detection error or judgment error, It is a fact that it is occurring.

Therefore, it is necessary to precisely determine the cause of the temperature change inside the switchboard and prevent it from leading to fire or the like.

10-2010-0025937 10-1194021

An object of the present invention is to provide an electric distribution panel having an abnormality diagnosis function of temperature and current analysis method.

An electrical distribution board having an abnormality diagnosis function of temperature and current analysis according to the object of the present invention is installed outside the switchboard and senses the temperature and converts the sensed temperature into a first voltage value corresponding to the sensed temperature, An external wire temperature sensor module having an address; An internal wireless temperature sensor module installed at at least one conductor connecting portion inside the switchboard, sensing an external temperature, converting the voltage into a second voltage value corresponding to the sensed temperature, transmitting the internal voltage, and having a unique address; Receiving the first voltage value from the external wire temperature sensor module, receiving the second voltage value from the internal wireless temperature sensor module, and outputting the received first voltage value and the second voltage value to the corresponding external temperature and internal temperature, respectively A temperature conversion module for converting; A CT (Current Transformer) current transformer for measuring a current flowing through at least one conductor connecting portion inside the switchboard and measuring a current flowing therethrough; A CT current transformer installed on a secondary side of the CT current transformer for measuring the current flowing therethrough and transmitting the current measured by the CT current transformer for measuring the CT current; A change amount of the external temperature converted by the temperature conversion module with time, a change amount with time of the internal temperature converted by the temperature conversion module, and a change amount with time of the current passing through the through current transformer are analyzed And an abnormal state analysis module for outputting an abnormal state signal or an abnormal state indicating signal according to the analysis result.

At this time, the abnormal state analysis module calculates an amount of change per unit time of the energization current per unit time of the amount of subtraction of the external temperature converted by the temperature conversion module 130 at the internal temperature converted by the temperature conversion module 130 at a predetermined time And output an abnormality symptom signal when the difference exceeds a predetermined threshold change amount.

And an alarm module that outputs an alarm sound or transmits an alarm alarm when an anomaly or an abnormal condition is output as a result of the analysis by the abnormal state analysis module.

According to the above-described switchboard having the abnormality diagnosis function of the temperature and the current analysis method, since the sensor module having the unique address is used, the deterioration point inside the switchboard can be accurately grasped.

It detects the temperature of the conductor connection area inside the switchboard and the outside of the switchboard, monitors the difference between the temperature of the conductor connection part inside the switchboard and the outside of the switchboard, that is, the actual temperature of the conductor connection part with time, It is possible to accurately determine whether the temperature rise at the conductor connecting portion inside the switchboard is caused by the external factors of the switchboard, by the increase of the switchboard current, or by the loosening of the conductor connecting portion. Therefore, it is possible to reduce the monitoring burden of the user by correct judgment and to reduce the temperature judgment error that continues.

FIG. 1 is a block diagram of a distribution board having an abnormality diagnosis function of a temperature and a current analysis method according to an embodiment of the present invention.
FIG. 2 is a graph showing a change in temperature / current in a steady state in an ASSC with an abnormality diagnosis function according to an embodiment of the present invention. FIG.
3 is a graph showing an abnormal state (a change in temperature / current flow at which a sudden rise in temperature is caused more than a change in the energized current) in an ASTB with an abnormality diagnosis function according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail to the concrete inventive concept.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various elements, but the elements should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

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

FIG. 1 is a block diagram of a distribution board having an abnormality diagnosis function of a temperature and a current analysis method according to an embodiment of the present invention.

Referring to FIG. 1, an electric switchboard (hereinafter, referred to as 'an electric switchboard') 100 having an abnormality diagnosis function of temperature and current analysis according to an embodiment of the present invention includes an external wire temperature sensor module 110, The internal wireless temperature sensor module 120, the temperature conversion module 130, the current transformer current transformer 140, the through current transformer 150, the abnormality analysis module 160, and the alarm module 170 . ≪ / RTI >

Unlike the existing switchboard, the switchboard 100 is configured to detect the temperatures inside the switchboard 100 and the outside of the switchboard 100 and to monitor them in real time.

The temperature change amount of the inside of the switchboard 100 and the external temperature change amount are analyzed to analyze the variation amount of the energized current so as to determine whether the sudden temperature rise inside is caused by an increase in energizing current or an external temperature rise, It is possible to accurately judge and monitor without errors.

In addition, by assigning a unique address to each of the external wire temperature sensor module 110 and the internal wireless temperature sensor module 120, it is possible to accurately detect the deterioration point of the internal wireless temperature sensor module 120, .

Hereinafter, the detailed configuration will be described.

The external wire temperature sensor module 110 is installed outside the switchboard 100. And is preferably attached to the outside of the door of the switchboard 100.

The external wire temperature sensor module 110 senses the external temperature of the switchboard 100 and converts the sensed temperature into a first voltage value corresponding to the sensed temperature and transmits the first voltage value to the abnormal state analysis module 160.

The external wire temperature sensor module 110 is preferably configured to wire the first voltage value.

The external wire temperature sensor module 110 is provided for each group of the switchboards 100 and may be configured to have a unique address.

The external wire temperature sensor module 110 transmits a first voltage value together with a unique address of the external wire temperature sensor module 110 itself so that the first voltage value is the voltage value of the external wire temperature sensor module 110 The abnormal state analysis module 160 can grasp the abnormal state.

The internal wireless temperature sensor module 120 may be installed in at least one or more conductor connection portions inside the switchboard 100.

The internal wireless temperature sensor module 120 may be configured to sense the temperature of the conductor connection site, convert the sensed temperature to a second voltage value corresponding to the sensed temperature, and transmit the second voltage value to the abnormality analysis module 160.

The internal wireless temperature sensor module 120 is preferably configured to wirelessly transmit the second voltage value.

At least one internal wireless temperature sensor module 120 may be provided and each internal wireless temperature sensor module 120 may be configured to have a unique address.

The internal wireless temperature sensor module 120 transmits the second voltage value together with a unique address of the internal wireless temperature sensor module 120 itself to determine the voltage value of the internal wireless temperature sensor module 120 The abnormal state analysis module 160 can grasp the abnormal state. Therefore, the abnormal state analysis module 160 can grasp the accurate deterioration point inside the switchboard 100.

The temperature conversion module 130 may be configured to receive the first voltage value from the external wire temperature sensor module 110 and receive the second voltage value from the internal wireless temperature sensor module 110. [

The temperature conversion module 130 may be configured to convert the first voltage value and the second voltage value to predetermined external temperatures and internal temperatures, respectively.

The CT current transformer 140 for measuring an energized current may be installed in at least one energizing circuit inside the switchboard 100. [

The CT current transformer 140 for measuring the conduction current can be configured to measure the current passing through the conductor connection site.

The through-type current transformer 150 may be installed on the secondary side of the CT current transformer 140 for measuring the current flow, and may transmit the current measured by the CT current transformer 140 for measuring the current flow to the anomaly analysis module 160 Lt; / RTI >

The abnormal state analysis module 160 calculates a change amount of the external temperature converted by the temperature conversion module 130 with time, a change amount of the internal temperature converted by the temperature conversion module 130 with time, And monitor the amount of change of the delivered current with time.

The abnormal state analysis module 160 may accumulate and store the internal temperature, the external temperature, and the energizing current in real time, and display the change amount with respect to time on a graph (not shown).

The abnormal state analysis module 160 may be configured to analyze the variation of the internal temperature of the switchgear 100 and the external temperature difference with time and the variation of the current with time.

The abnormal state analysis module 160 outputs an abnormal state signal or an abnormal state indication signal through a display (not shown) when the change of the temperature of the interior temperature outside the external temperature rapidly becomes larger than the change amount of the energization current per hour, Or to output to the alert module 170.

The analysis algorithm of the abnormal state analysis module 160 is as follows.

First, the abnormality analysis module 160 determines whether or not a pure temperature rise amount per hour, excluding the temperature rise amount of the external temperature converted by the temperature conversion module 130, in the temperature rise amount of the internal temperature converted by the temperature conversion module 130 at a predetermined time, It is determined that the abnormal state is determined.

In this case, if the rising amount of the external temperature difference in the cabinet 100 is greater than the rising amount of the energizing current per hour, the abnormal state analysis module 160 outputs an abnormal state signal to the alarm module 170 . This is because, if the amount of rise of the temperature outside the internal temperature is greater than the amount of change in the amount of current per unit time, the increase in internal temperature is not caused by the rise in the external temperature but the rise in contact resistance Because of the heat generated by the heat.

The alarm module 170 may be configured to output an alarm sound or transmit an alarm alarm to a user terminal (not shown) in real time when an anomaly or an abnormal condition is output as a result of analysis by the anomaly analysis module 160 .

The alarm module 170 may be configured to transmit an accurate deterioration point to a user terminal (not shown) using the address of the internal wireless temperature sensor module 120. [

FIG. 2 is a graph showing a change in temperature / current in a steady state in an ASSC with an abnormality diagnosis function according to an embodiment of the present invention. FIG.

2, it is determined that the difference between the temperature change amount inside the switchboard 100 and the temperature change amount outside the switchboard 100 is similar to the change amount of the energization current per hour, and the change in the internal temperature is due to the change in the external temperature and the energization current per hour And it is judged that it is in a normal state.

3 is a graph showing an abnormal state (a change in temperature / current flow at which a sudden rise in temperature is caused more than a change in the energized current) in an ASTB with an abnormality diagnosis function according to an embodiment of the present invention.

Referring to FIG. 3, it can be seen that the amount of change in the temperature inside the switchboard 100 and the temperature difference outside the switchboard 100 over time is drastically higher than the amount of change in the current per unit time. This is considered to be a problem of heat generation due to an increase in contact resistance and an increase in contact resistance due to loosening of the conductor connecting portion.

The abnormality analysis module 160 can also be programmed to generate an alarm if the rate of increase of the difference between the internal temperature and the external temperature is greater than a rate of increase of the energized current.

May be configured to select a necessary algorithm in consideration of environmental specificity of the space in which the switchboard 100 is installed or various other factors, or may be configured such that a user directly sets a desired threshold value through an interface.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the following claims. There will be.

110: external wire temperature sensor module 120: internal wireless temperature sensor module
130: temperature conversion module 140: CT current transformer for measuring current flow
150: penetrating current transformer 160: abnormality analysis module
170: Alarm module

Claims (3)

An external wire temperature sensor module 110 installed outside the switchboard 100 for sensing the temperature, converting the voltage into a first voltage value corresponding to the sensed temperature, and transmitting and having a unique address;
An internal wireless temperature sensor module 120 installed at the at least one conductor connection portion in the switchboard 100 for sensing the temperature, converting the second voltage value into a second voltage value corresponding to the sensed temperature, and transmitting and transmitting the second voltage value;
Receives a first voltage value from the external wire temperature sensor module 110, receives a second voltage value from the internal wireless temperature sensor module 110, and receives the first voltage value and the second voltage value, A temperature conversion module 130 for converting the temperature to an external temperature and an internal temperature;
A CT (Current Transformer) current transformer 140 installed in at least one conductor connecting portion inside the switchboard 100 for measuring a current flowing therethrough;
A CT current transformer (150) installed on a secondary side of the CT current transformer (140) for measuring the current flow and transmitting the current measured by the CT current transformer (140) for measuring the current flow;
A change amount of the external temperature converted by the temperature conversion module 130 with time, a change amount of the internal temperature converted by the temperature conversion module 130 with time, a variation amount of the current passing through the through current transformer 150 And an abnormal state analysis module (160) for analyzing the variation with time according to each analysis and outputting an abnormal state signal or an abnormal state indicating signal according to the analysis result,
The abnormality analysis module 160 calculates an amount of change per unit time of the energization current per unit time of the amount of subtraction of the external temperature converted by the temperature conversion module 130 at the internal temperature converted by the temperature conversion module 130 at a predetermined time And outputs an abnormality symptom signal when the predetermined threshold change amount is exceeded,
Further comprising an alarm module (170) for outputting an alarm sound or transmitting an alarm alarm when the abnormality analysis module (160)
The external wire temperature sensor module 110 is attached to the outside of the door of the switchboard 100,
One of the external wire temperature sensor modules 110 is provided for each group of the switchgear 100,
The external wire temperature sensor module 110 transmits the first voltage value and the unique address of the external wire temperature sensor module 110 itself together with the first voltage value to the external state analysis module 160, The abnormality analysis module 160 can recognize the voltage value of the sensor module 110,
The internal wireless temperature sensor module 120 transmits the second voltage value together with the unique address of the internal wireless temperature sensor module 120 itself to the anomaly analysis module 160 so that the second voltage value is set to the internal wireless temperature The abnormality analysis module 160 can recognize whether the voltage value of the sensor module 120 is a voltage value,
The abnormal state analysis module 160 accumulates and stores the internal temperature, the external temperature, and the energizing current in real time, and displays the change amount with respect to time on a display through a graph,
The abnormal state analysis module 160 is configured to analyze a change amount of the internal temperature of the switchgear 100 and an external temperature difference with time and a variation amount of the current with time,
The alarm module 170 is configured to transmit an accurate deterioration point to a user terminal (not shown) by using the address of the internal wireless temperature sensor module 120. (100).
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