KR20090071933A - Fault diagnosis method and apparatus for manufacturing intelligent distribution panel and power supply - Google Patents

Abstract

The present invention relates to the diagnosis of abnormal conditions of the electrical equipment that enables the early detection of signs of electrical fires due to poor contact and arc through the detection of abnormalities of the electrical equipment. The present invention relates to a distribution panel (or switchboard). A state information detection device for detecting a state of power supplied to a load in real time and storing the state as power state data; On the basis of the power state data stored in the state information detecting apparatus, a detection algorithm for detecting an electrical contact failure and an arc is executed to detect an electrical contact failure and an arc, and when an abnormal state is determined, generates an alarm signal for alarming this. An abnormal state detection device; Implement an electrical contact failure and arc detection device as an alarm and automatic blocking device that notifies the remote manager or control system of electrical contact failure and arc detection by automatically dialing a preset contact number in response to the generated alarm signal. By doing so, it is possible to accurately detect electrical contact defects and arcs, which are signs of the electric fire, and by promptly alerting them, there is an advantage of preventing the electric fire.

Description

Fault diagnosis method and apparatus for manufacturing intelligent distribution panel and power supply device {Dignostic method and apparatus for manufacturing intelligent distrtibuting board cabinet panel and power supply}

The present invention relates to a technique for diagnosing an electrical abnormality of an electrical facility, which enables early detection of an electrical fire due to a poor contact or an arc by detecting abnormality of an electrical facility.

Generally speaking, more than 30,000 fires occur every year, and about one third of them are known as electric fires, and electrical fires are frequent, especially in factories and large shopping malls. When an electrical fire occurs in a place where power is intensive, a fire prevention system has always been urgently needed because of the enormous damage to property and the loss of life. Here, about 65% or more of electric fires caused by short circuits, poor contact, and arcs have been reported to the academic community.

On the other hand, until recently, it was the most proactive fire prevention measures to prevent the occurrence of fire due to short circuit or short circuit, which is the main cause of electric fire, but in the case of the electric line, it is mainly concealed inside the walls of buildings. In many cases, it was difficult to completely prevent short circuits or short circuits in electric lines.

In addition, in recent years, it is known that the cause of a short circuit is caused by an arc generated on an electric line, and accurate detection and blocking of an arc caused by various causes such as insulation breakdown, connection coupling, and aging phenomenon on an electric wiring that causes an arc are caused. There is an urgent need for a fire prevention safety system based on technology.

Accordingly, the present invention is proposed to prevent the fire caused by the electricity in advance,

The problem to be solved by the present invention is an intelligent distribution panel for detecting the arc generation information in advance, and early detection of electrical fires due to contact failure and arc through the detection of abnormality of the electrical equipment and An object of the present invention is to provide a method and apparatus for diagnosing abnormal conditions for manufacturing a power supply.

Another problem to be solved by the present invention is that the main cause of the electric fire

Intelligent monitoring that prevents electrical fires in advance by monitoring ARC and electrical contact in real time, and prompting diagnosis and repair of electrical abnormalities when an electrical abnormality is detected. An object of the present invention is to provide a diagnostic method and an apparatus for diagnosing abnormal conditions for the manufacture of switchboards and power supplies.

According to the present invention for solving the above problems, "an abnormal state diagnostic device for manufacturing an intelligent distribution panel and a power supply device",

A state information detection device for detecting a state of power supplied to a load in a distribution panel or a distribution panel in real time and storing the state as power state data;

Based on the power state data stored in the state information detecting apparatus, a detection algorithm for detecting a poor electrical contact and an arc is executed to detect a poor electrical contact and an arc, and when an abnormal state is determined, generates an alarm signal to alert the user. An abnormal state detection device;

In response to the alarm signal generated by the automatic dialing to the predetermined contact number includes an alarm device for notifying the remote manager or control system of electrical contact failure and arc detection.

In the above, the detection algorithm for the electrical contact failure and arc detection,

By calculating and extracting power quality based on the power state data, analyzing the amount of change by the extracted power quality factors, and applying a fuzzy rule table for the amount of change when a certain amount is changed by a certain amount and separately assigning an important weight according to each load state It is characterized in that it is an algorithm for detecting electrical contact failure and arc generation by checking whether it is within the range of stability.

In the above, the abnormal state detection device,

A detection circuit for detecting current and voltage of a power supply supplied to the load;

The current / voltage detected by the detection circuit is converted into a corresponding digital signal and stored in a memory, and based on the stored detection data, a detection algorithm for detecting an electrical contact failure and an arc is executed to determine whether there is an abnormal state. A controller including a digital signal processor which judges, and displays a result of the determination and detection data and generates an alarm signal when an abnormal state occurs;

A liquid crystal display (LCD) and a light emitting diode (LED) for displaying power quality or visually displaying an abnormal state according to a display signal generated by the controller;

A buzzer that audibly alerts to an abnormal condition in accordance with an alarm signal generated by the controller;

RS 485 communication unit for transmitting the alarm signal generated in the controller to the alarm device in a wired communication method.

In addition, the "abnormal state diagnosis method for manufacturing an intelligent distribution, switchboard and power supply device" according to the present invention for solving the above problems,

Calculating a power quality for each element by using the detected voltage / current information;

A second step of analyzing a change amount of power quality for each element;

A third step of determining whether an event occurs by applying a fuzzy rule table for the change amount when the change in the power quality of each element occurs and assigning a weight to each load;

A fourth step of determining whether an event has occurred by finally checking a duration and a repetition time of the event when an event occurs as a result of the determination;

And a fifth step of generating an alarm and a blocking signal for preventing an electrical fire due to an electrical contact failure and an arc in case of an event occurrence.

 In the above, the third step may include applying a fuzzy rule table to which different weights are applied for each element; And analyzing the result of applying the fuzzy rule table by an arc discrimination method to determine whether an event has occurred, wherein the arc discrimination method determines the occurrence of arc by applying a result of the fuzzy rule table to a multi-faceted evaluation method. It is done.

In addition, the "abnormal state diagnosis method for manufacturing an intelligent distribution, switchboard and power supply device" according to the present invention for solving the above problems,

Calculating a power quality for each element by using the detected voltage / current information;

A second step of analyzing a change amount of power quality for each element;

A third step of determining whether an event occurs by applying a fuzzy rule table of the change amount when a change occurs in the power quality of each element;

A fourth step of determining whether an event occurs and finally determining whether the event is repeated when an event occurs as a result of the determination;

And a fifth step of generating an alarm for preventing an electrical fire due to an electrical contact failure and an arc in case of an event occurrence.

According to the present invention, there is an advantage that the early detection of the sign of the electrical fire due to contact failure and arc through the detection of abnormal phenomenon of the electrical equipment.

In addition, by detecting the arc signal generated on the electric line in real time to monitor the risk of fire on the electric line due to the arc generation, in the event of a fire risk of a fire, it is possible to take immediate arc diagnosis and the recovery of the line, There is an advantage that can prevent the occurrence of electrical fire due to battery contact failure or arc.

Hereinafter, described in detail with reference to the accompanying drawings a preferred embodiment of the present invention. If it is determined that the detailed description of the known function or configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

3 is a block diagram showing the configuration of an abnormal state diagnosis apparatus for manufacturing an intelligent distribution panel and a power supply apparatus according to the present invention, and includes a current detecting device 101 to 103, a load 100, and a state information detecting device. 200, an abnormal state detection device 300, and an alarm device 400.

The current detecting elements 101 to 103 are mounted at predetermined positions of the power lines of the three-phase AC power supplies R, S, and T supplied to the load 100 from the distribution panel (or distribution panel), and detect current / voltage of each phase. As to perform the function, it is preferable to use a CT or ZCT.

The state information detecting apparatus 200 performs a function of detecting in real time state information (voltage and current) of power supplied to the load 100 from a distribution panel (or a distribution panel) and storing it as power state data. A general personal computer may be implemented, and a conventional data storage and processing apparatus for detecting a voltage / current and storing and processing the same as data may be used.

The abnormal state detection device 300 detects an electrical contact failure and an arc by executing a detection algorithm for detecting electrical contact failure and arc based on the power state data (voltage, current) stored in the state information detection apparatus 200. If it is determined that the abnormal state, and performs the function of generating an alarm signal to alert this.

The abnormal state detection device 300, as shown in Figure 4, the detection circuit 310 for detecting the current and voltage of the power supplied to the load 100; The current / voltage detected by the detection circuit 310 is converted into a digital signal using an analog / digital converter 341 and stored in the memory 343, and the electrical contact failure and A controller 340 including a digital signal processor (DSP) 342 which executes a detection algorithm for arc detection to determine whether an abnormal state is present, and displays the result of the determination and detection data and generates an alarm signal when an abnormal state occurs. )Wow; A liquid crystal display (LCD) 350 and a light emitting diode (LED) 360 for displaying power quality or visually displaying an abnormal state according to a display signal generated by the controller 340; A buzzer 370 that audibly alerts to an abnormal state according to the alarm signal generated by the controller 340; An RS485 communication unit 320 for transmitting the alarm signal generated by the controller 340 to the alarm device 400 in a wired communication manner; RTC 330 provides a real-time driving clock to controller 340.

The alarm device 400 performs a function of notifying an electric contact failure and arc detection to a remote manager or control system by automatically dialing a preset contact number in response to the generated alarm signal, and using a wired communication device. It is preferable to do so, but it may be replaced by a wireless communication device as necessary.

The operation of the abnormal state diagnosis apparatus for manufacturing the intelligent distribution panel and the power supply apparatus configured as described above will be described in detail with reference to FIGS. 1 and 2.

First, when the three-phase AC power (R, S, T) supplied from the distribution panel (or the distribution panel) is supplied to the load 100, the current detection elements 101 to 103 mounted at predetermined positions on each power line in real time. By this, the current of each phase is detected, which is converted into a voltage and transmitted to the state information detecting apparatus 200.

The state information detecting apparatus 200 converts the voltage / current detection value of each phase detected in real time into digital data information, and stores it in the internal memory. The real-time detected state information (voltage data, current data) stored in the memory is provided to the abnormal state detection device 300.

The abnormal state detecting device 300 detects the voltage and current provided from the state information detecting device 200 in the detecting circuit 310, and the analog / digital converter 341 of the controller 340 converts the digital data into digital data. The digital signal processor 342 stores the information in the memory 343 as state information.

Thereafter, state information stored in the memory 343 is extracted, and a detection algorithm for detecting electrical contact failure and arc previously stored in the memory 343 is executed to detect an electrical contact failure and an arc. Here, the detection algorithm for detecting the electrical contact failure and arc, calculates and extracts the power quality based on the power state data, and analyzes the amount of change for each extracted power quality factor to generate a fuzzy rule table for the amount of change As an algorithm for detecting electrical contact failure and arc generation by applying, it will be described in detail in the electrical contact failure and arc detection method of the present invention to be described later.

As a result of the detection using the algorithm, if it is determined that the abnormal state, that is, electrical contact failure and arc is detected, generates an alarm signal for the alarm of the abnormal state and generates an alarm through the buzzer 370 and At the same time provides an alarm signal to the alarm device 400 through the RS485 communication unit 320. In addition, alarm data may be displayed on the LCD 350 according to the generated alarm signal, or the LED 360 may blink or emit light to visually display an alarm state. In addition, the LCD 350 performs a function of displaying power quality information (power factor, harmonics, overcurrent, surge, swell, etc.) for each basic element calculated from state information in addition to the alarm signal, and the LED 360 also includes a plurality of LEDs. It is possible to distinguish between steady state and abnormal state by using light emitting diodes and different colors.

When the alarm signal 400 arrives by the abnormal state detection device 300, the alarm device 400 performs automatic dialing with a preset contact number (for example, a manager mobile number, a control system contact number, etc.), This indicates that an electrical contact failure and arc has been detected. Here, the alarm device 400 may call the manager or the person in charge of the control system by performing the automatic dialing. Alternatively, the manager 400 may call the manager or the control system through automatic dialing using a general landline telephone, and call the receiver. It is also possible to report the abnormal condition through voice.

5 is a flowchart illustrating a method for diagnosing an abnormal state for fabricating an intelligent distribution panel and a power supply device according to the present invention, where S represents a step.

As shown therein, a first step (S101 to S103) of calculating power quality for each basic element by using the detected voltage / current information; A second step (S105) of analyzing a change amount of power quality for each element; A third step (S107 to S111) of determining whether an event occurs by applying a fuzzy rule table for the change amount when a change occurs in the power quality of each element; A fourth step (S113) of finally determining whether an event has occurred by checking a duration of the event when an event occurs as a result of the determination; And a fifth step (S115) of generating an alarm for preventing an electrical fire due to an electrical contact failure and an arc in case of an event occurrence.

Here, the third step (S107 ~ S111), the step (S107) of confirming whether the change amount for each element; And applying a fuzzy rule table to which different weights are applied for each element, and analyzing the result of applying the fuzzy rule table by an arc discrimination method to determine whether an event occurs (S109 to S111).

The electrical contact failure and arc detection method according to the present invention made in this way, the method as described in Figures 1 and 2 first noted the voltage and current on the power supply line supplied to the load from the distribution panel (or switchboard) in step S101 Detects with

Thereafter, the method proceeds to step S103 and calculates basic power quality for each element based on the detected voltage and current information. Here, the basic power quality of each element includes power factor, harmonic occurrence, overcurrent, surge, disconnection, swell, and the like. The method of calculating the basic power quality of each element based on the detected voltage and current information is a known power measurement. Since the method used in the method is applied as it is, detailed description is omitted.

Next, in step S105, the amount of change in power quality for each element is analyzed, and in step S107, it is checked whether the amount of change in power quality for each element occurs. Here, the amount of change in power quality for each element is determined to be a change in power quality even if a change in quality occurs for any one of a plurality of power quality.

Figure 3 shows the voltage and current state of the power supply line when the arc occurs, the portion shown by the dotted circle shows the current change state when the arc occurs. Figure 4a shows the voltage and current waveforms during arc generation, Figure 4b shows the abnormal current and arc current waveforms. Therefore, since the voltage / current waveform in the abnormal state and the voltage / current waveform at the occurrence of the arc are different, it is easy to know whether the power quality is changed by using such a voltage / current waveform. One of the easiest ways to determine the change in power quality of each element is to compare the power quality of each element of the previous state and the power quality of each element of the current state to determine whether the power quality has changed.

Subsequently, as a result of checking in step S107, there is no change in power quality or a change in power quality occurs. If the change amount is very minute, it is determined as a normal state and the process moves to step S101. Here, it is preferable to set the criteria of the minute amount of change for determining the steady state by experiment.

On the contrary, if a change has occurred in the power quality, and the change amount exceeds a range for determining the normal state, it is determined as an abnormal state, and the process moves to step S109 to apply a fuzzy rule table for the change amount.

) 및 THDE(

)의 출현 여부, 검출전압과 아크 판단의 기준이 되는 전류 임계치(

) 및 THDE(

)의 출현 여부, 전압 임계치와 전압 THDE와의 상관관계, 전류 임계치와 전류 THDE와의 상관관례를 고려하여 퍼지 룰 테이블을 구현하였다.6A to 6F illustrate an example of a fuzzy rule table implemented in the present invention. In this case, ZO is set to 1, PS is set to 2, PM is set to 4, and PB is set to 6.

) And THDE (

), The current threshold that is the basis for the detection voltage and arc judgment (

) And THDE (

Fuzzy rule table is implemented in consideration of the presence of), correlation between voltage threshold and voltage THDE, and correlation between current threshold and current THDE.

The result value is calculated by substituting the amount of change for each element detected in the fuzzy rule table implemented as described above, and the result value obtained by detecting the fuzzy rule table in step S111 is substituted into the arc discrimination method (multi-faceted evaluation method) as shown in FIG. It is determined whether or not an event occurs.

FIG. 7 illustrates a method of determining contact failures and arcs. When six (I, II, III, IV, V, VI) results exist within a hexagon represented by 10, the contact failures and arcs are not judged. On the contrary, when the six result values deviate from the hexagon represented by 10 as shown in FIG. 10, it is determined that contact failure and arc generation occur. Referring to FIG. 10, if the value of V is relatively larger than the other values, or the values of IV, V, VI are normal, and the values of I, II, III exceed the reference values, contact failure and arc Judging by the occurrence.

8A to 8G are experimental waveforms generated when the present invention is tested, and it can be seen that the detection waveforms are different when an arc occurs in FIGS. 8C and 8G.

9A to 9D are tables showing a correlation between voltage harmonics and rms and a correlation between current harmonics and rms. By using this, it is possible to determine whether voltage harmonics and current harmonics occur at each rms.

If it is determined that the event has occurred as a result of the primary determination in a known manner, go to step S113 for reliability and check whether the event lasts for a predetermined period of time calculated in advance by experiment to determine the electrical contact failure and the occurrence of arc. do. This is because an alarm does not occur in the case of a momentary arc because the load does not fail when the arc is momentarily generated and then returns to the normal state. Here, the present invention re-determined whether or not the electrical contact failure and arc generation for a certain period (duration time), it is also possible to determine the final electrical contact failure and arc generation by using the repeated number of arcs generated in addition to this method.

After finally determined that the electrical contact failure and arc generation, go to step S115 to warn of the electrical contact failure and arc generation, to prevent the electrical contact failure and arc to lead to an electrical fire. Here, the method of alarming the electrical contact failure and arc generation is the same as the alarm method in the alarm device 400 in the description of FIGS. 1 and 2 well known, it will be omitted to avoid redundant description.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

As described above, the present invention is a technology capable of accurately detecting electrical contact failure and arc generation, and is applicable not only to a distribution board or a distribution board for supplying a three-phase AC power supply to a load, but also to any industrial field using a power supply.

1 is a configuration diagram of an abnormal state diagnosis apparatus for manufacturing an intelligent distribution panel and power supply apparatus according to the present invention.

2 is a configuration diagram showing an example of the abnormal state detection apparatus of FIG.

Figure 3 is a waveform diagram of the change in arc current when an abnormal condition occurs in the present invention.

Figures 4a and 4b is a steady-state voltage, current and arc generation voltage, current variation waveform diagram in the present invention.

5 is a flow chart showing an abnormal state diagnosis method for manufacturing an intelligent distribution panel and a power supply device according to the present invention.

6a to 6f is a fuzzy rule table applied to the present invention.

Figure 7 is a principle diagram showing a multi-faceted evaluation method for arc discrimination in the present invention.

8a to 8h is a waveform diagram of the experimental results in the present invention.

Figures 9a to 9d is a relationship between the voltage / current high frequency and rms in the present invention.

10 is an explanatory diagram for explaining the determination of the arc detection by the multi-faceted evaluation method in the present invention.

Claims (9)

In the abnormal state diagnosis device for the intelligent distribution, switchboard and power supply device manufacturing, A state information detection device for detecting in real time a state of power supplied to a load from a distribution panel (or a distribution panel) and storing the state as power state data; On the basis of the power state data stored in the state information detecting apparatus, a detection algorithm for detecting an electrical contact failure and an arc is executed to detect an electrical contact failure and an arc, and when an abnormal state is determined, generates an alarm signal for alarming this. An abnormal state detection device; Intelligent distribution, power distribution board and power supply, characterized in that it comprises an alarm for notifying the electric contact failure and arc detection to the remote manager or control system by automatically dialing the preset contact number in response to the generated alarm signal Abnormal condition diagnosis device for supply device manufacturing. The detection algorithm of claim 1, wherein the detection algorithm for detecting electrical contact failure and arc is calculated by calculating a power quality based on the power state data, and analyzing a change amount for each extracted power quality element to change a predetermined amount or more. An abnormal state diagnosis apparatus for manufacturing an intelligent distribution panel and a power supply device, comprising: an algorithm for detecting an electrical contact failure and an arc by applying a fuzzy rule table. According to claim 1, The abnormal state detection device, A detection circuit for detecting current and voltage of a power supply supplied to the load; The current / voltage detected by the detection circuit is converted into a corresponding digital signal and stored in a memory, and based on the stored detection data, a detection algorithm for detecting an electrical contact failure and an arc is executed to determine whether there is an abnormal state. A controller including a digital signal processor which judges, and displays a result of the determination and detection data and generates an alarm signal when an abnormal state occurs; A liquid crystal display (LCD) and a light emitting diode (LED) for displaying power quality or visually displaying an abnormal state according to a display signal generated by the controller; A buzzer that audibly alerts to an abnormal condition in accordance with an alarm signal generated by the controller; And an RS485 communication unit for transmitting the alarm signal generated by the controller to the alarm device in a wired communication manner. In the abnormal state diagnosis method for the intelligent distribution, switchboard and power supply device manufacturing, A first step of calculating basic power quality by using voltage / current information detected on a line supplied from a switchboard to a load; A second step of analyzing a change amount of power quality for each element; A third step of determining whether an event occurs by applying a fuzzy rule table for the change amount when the change in the power quality of each element occurs and assigning a weight to each load; A fourth step of determining whether an event occurs and finally determining whether the event occurs when an event occurs as a result of the determination; Intelligent distribution, switchboard and power supply device comprising the fifth step of generating an alarm and blocking signal to prevent electrical contact due to electrical contact failure and arc in advance in case of event occurrence Fault diagnosis method for manufacturing. The method of claim 4, wherein the third step, Applying a fuzzy rule table to which different weights are applied for each element, and assigning a weight according to each load; And analyzing the result of applying the fuzzy rule table by an arc discrimination method to determine whether an event has occurred. The abnormal state diagnosis method for manufacturing an intelligent distribution panel and a power supply device. The method of claim 5, wherein the arc discrimination method determines whether an arc is generated by applying a result of the fuzzy rule table to a multi-faceted evaluation method. . In the abnormal state diagnosis method for the intelligent distribution, switchboard and power supply device manufacturing, A first step of calculating basic power quality by using voltage / current information detected on a line supplied from a switchboard to a load; A second step of analyzing a change amount of power quality for each element; A third step of determining whether an event occurs by applying a fuzzy rule table of the change amount when a change occurs in the power quality of each element; A fourth step of determining whether an event occurs and finally determining whether the event is repeated when an event occurs as a result of the determination; The intelligent distribution, switchboard and power supply device are characterized in that it comprises a fifth step of generating an alarm to prevent electrical contact due to the electrical contact failure and arc in case of event occurrence. Abnormal condition diagnosis method. The method of claim 7, wherein the third step, Applying a fuzzy rule table to which different weights are applied for each element; And analyzing the result of applying the fuzzy rule table by an arc discrimination method to determine whether an event occurs. 10. The method of claim 8, wherein the arc discrimination method determines whether an arc is generated by applying a result of the fuzzy rule table to a multi-faceted evaluation method. .

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