KR102266781B1 - Method for detecting disabled device of electric power line monitoring system - Google Patents

Abstract

The present invention relates to a method for determining a failure of a distribution line monitoring device using the Internet of Things (IoT). More specifically, in a distribution line monitoring system including distribution line monitoring devices installed on distribution lines at intervals of a predetermined distance or span to determine the location of various line accidents, such as disconnection accidents, short circuit accidents, or ground faults occurring on overhead distribution lines, and communicating with each other through IoT communications and a control server communicating with them, the method automatically and regularly inspects whether the installed monitoring devices are operating normally to prevent communication failures in all sections due to transmission/reception disability of a part of monitoring devices, and finds the installation location of the failed monitoring device and informs of the installation location through the control server when the failed monitoring device exist, thereby increasing reliability of the distribution line monitoring devices. In addition, when a failed monitoring device is replaced through inspection, a replaced monitoring device can automatically identify and store IDs of nearby monitoring devices to communicate with and the monitoring devices adjacent to the replaced monitoring device can automatically identify an ID of the replaced monitoring device. The method comprises an inspection signal transmission step, a repeating step, a failure signal transmission step, a repeating step, a failure information display step, and a determination result display step.

Description

Method for detecting disabled device of electric power line monitoring system for detecting the location of a faulty distribution line monitoring device and automatically setting a replaced monitoring device

The present invention relates to a method for judging a failure of a distribution line monitoring device using the Internet of Things. In more detail, it is installed at a certain distance or interval of a certain span on the distribution line to identify the location of various line accidents such as disconnection accidents, short circuit accidents, or ground faults occurring on the overhead distribution line through Internet of Things communication. In a distribution line monitoring system consisting of a distribution line monitoring device that communicates with each other and a control server communicating with them, in order to prevent a communication failure situation in the entire section due to the inability to transmit/receive some monitoring devices, the installed monitoring devices are It is to improve the reliability of the distribution line monitoring device by regularly automatically checking whether it is operating normally, and by finding the installation location of a malfunctioning monitoring device and notifying it through the control server. In addition, when a malfunctioning monitoring device is replaced through inspection, the replaced monitoring device automatically identifies and stores the IDs of surrounding monitoring devices with which it communicates, as well as replacing the replaced monitoring devices and adjacent monitoring devices. It relates to a method for automatically identifying the ID of a monitored device.

Overhead distribution lines are the main means for supplying power from substations to consumers. In general, overhead distribution lines are formed over long distances, and they are continuously increasing due to the increase in power demand and the expansion of power supply sources following the development of residential land and industrial complexes. Overhead distribution lines are getting longer and expanded, and they are becoming more and more complex as the demand increases. As the length of the overhead distribution line increases, the risk of various line accidents such as short circuit accidents, ground fault accidents, or disconnection accidents increases. In particular, these accidents not only cause a wide range of blackout accidents, but also cause secondary accidents such as electric shocks or fires, which cause great damage to life or property. For example, in the case of a large forest fire in Gangwon-do in 2019, it was revealed that it was caused by a disconnection of a special high-voltage distribution line. The need to establish a system that can perform countermeasures in a timely manner is increasing.

In the case of a short circuit accident in the distribution line, the circuit breaker located on the substation or main phase operates. In the event of a ground fault, the ground fault relay installed in the substation, etc. is operated to automatically cut off the accident. In some cases, the point of occurrence is roughly calculated and informed to the manager, etc. Accordingly, the accident handling team members quickly mobilize to the point where the accident occurred and take necessary measures. However, since the accident location detection devices measure the current value flowing through the line and estimate the location according to the calculated result, an estimation result different from the actual accident location is inevitably generated due to a measurement error. Therefore, in order to accurately find the accident site, it is necessary to go to the scene and search around the estimated location, but it takes a lot of time and effort to find the exact location through the search. there has been

As a prior art for solving such a problem, a distribution line monitoring device is installed on a distribution line at every predetermined distance or every predetermined span, and the monitoring devices measure and monitor the line condition of the distribution line through wireless communication while measuring or monitoring results A technology has been developed that transmits the data to the control server of the institution that monitors the distribution lines. For example, in Korean Patent Registration No. 10-147893, a detection unit that is fixedly installed with a clamp at every predetermined section of a distribution line and detects when a disconnection of a distribution line or an abnormal current occurs through an induced electromotive force, and the sensing unit Disclosed is an apparatus for detecting an abnormal current and a disconnection position of a distribution line including a detection unit that compares a signal and a set signal to determine whether the disconnection of the distribution line and an abnormal current occur. Here, when it is determined that a disconnection of the distribution line and an abnormal current have occurred, the detection unit transmits the detection information to the management server connected to the communication network. In addition, Republic of Korea Patent No. 10-0979636 is a wireless monitoring system for detecting an abnormal current in a transmission/distribution line. When an abnormal current is detected, the abnormal current is notified to the distribution automation system and the wireless load detection system, which are upper-level systems, through wireless, so that the abnormality occurs Disclosed is a controller unit capable of quickly acknowledging the location of a fault and quickly responding to a failure.

However, since the monitoring devices used in the prior art generally use commercialized wireless communication technology, each information collection device joins a commercial wireless communication network such as LTE or a commercial Internet of Things network such as LoRa to perform data communication or , otherwise, since a separate wireless communication network needs to be built, when a monitoring device needs to be installed throughout the distribution line, the burden on the network usage cost becomes too high, so it is difficult to realize it. In addition, there is a problem that it is fundamentally impossible to use the commercial communication network in places such as mountainous terrain where it is difficult to use the commercial communication network and it is expensive to expand the network infrastructure. Of course, when using the Internet of Things (IoT) commercial network based on low-power long-distance communication technology (LPWA), the cost burden can be reduced, but it is not a fundamental solution, and the available infrastructure is not covered nationwide, and its reach is also limited. Because there are many, it has been difficult to apply in transmission and distribution lines formed over long distances or in mountainous terrain.

In order to solve such problems in the prior art, a technology for constructing a distribution line monitoring system using a short-range or medium-range Internet of Things (IoT) has recently been developed. For example, Korean Patent Registration No. 10-2191711 relates to a method and system for measuring, collecting, and analyzing power information of a transmission and distribution line using the Internet of Things, and is processed to measure and collect the load current for each section of the transmission line or distribution line. Disclosed is a power information collecting device that is repeatedly installed for each phase on an electric wire by a certain section.

However, since the monitoring devices installed on the distribution line are attached to the electric wire of the distribution line in a state of being exposed to the outside and installed, they have to endure extreme temperature changes while going through severe cold or hot weather for a long time, and must be subjected to severe temperature changes such as strong winds, heavy snow, or heavy rain. There is a high possibility of being damaged or moisture permeating from the distribution line, and since it is repeatedly installed at regular intervals over the entire section of the distribution line, a very large number of monitoring devices are installed, so the frequency of damage or breakdown among the installed monitoring devices is high. It is very high. On the other hand, if IoT communication, which can communicate only with adjacent monitoring devices, is used, even if one or two malfunctions in the middle, the monitoring network across the distribution line becomes inoperable. Therefore, it is necessary to perform periodic inspections and promptly replace faulty devices. In particular, the distribution line monitoring system to identify the accident point in the event of a line accident is mainly operated only in the case of a line accident, so there is no way to know whether it is operating properly in normal times, so it is necessary to periodically inspect whether it is operating normally. Since it is a device attached to the electric wire of a computer, it is practically very difficult to visually inspect or measure each by using a signal measuring device, so it is necessary to develop a technology that can automatically check it and find the location of the faulty monitoring device.

In addition, if faulty monitoring devices are found through continuous inspection, they should be replaced promptly. However, if a malfunctioning monitoring device is replaced, the ID or address of the surrounding monitoring device must be inputted one by one to the replaced monitoring device, and in the case of the peripheral monitoring device, the ID or address of the newly replaced monitoring device must be newly entered. This is because it is necessary to know the ID or address of the other party for IoT communication between monitoring devices. Therefore, when replacing a faulty monitoring device, not only the replacement monitoring device but also the adjacent monitoring device must be detached from the distribution line and reconnected after changing the setting information in order to change all the setting information of the adjacent monitoring devices, etc. There has been a problem in that time and manpower are required for maintenance and management.

Republic of Korea Patent No. 10-147893 (2014.12.26.) Republic of Korea Patent Registration No. 10-0979636 (2020.8.26.) Republic of Korea Patent Registration No. 10-2191711 (2020.12.10.) Republic of Korea Patent Registration No. 10-1780712 (2017.10.10.)

In order to solve the above problems, the automatic inspection method of a distribution line monitoring apparatus using the Internet of Things according to the present invention is a distribution line monitoring system that is installed on a distribution line at regular intervals and transmits a distribution line monitoring result through Internet of Things communication. In the present invention, the purpose is to prevent the occurrence of a communication failure in the entire section due to the inability to transmit/receive some monitoring devices.

The present invention also automatically checks the presence or absence of failure of distribution line monitoring devices installed at regular intervals on the distribution line and transmitting the distribution line monitoring results through IoT communication, and if there is a faulty monitoring device, the Its purpose is to provide a method for locating and reporting an installation location.

Another object of the present invention is to enable the replaced monitoring device to automatically identify and store the IDs of surrounding monitoring devices with which it communicates, when a faulty monitoring device is found and replaced as a result of the automatic inspection, and, of course, An object of the present invention is to provide a method for enabling monitoring devices and adjacent monitoring devices to automatically identify the ID of a replaced monitoring device.

Another object of the present invention is to check the operation status of the distribution line monitoring devices installed at regular intervals on the distribution line, and even if it is not in a broken state, the monitoring devices with reduced performance are highly likely to fail soon. It aims to find out in advance and provide a way to find out its location.

Another object of the present invention is to relay and transmit inspection signals between adjacent monitoring devices in an IoT communication method. An object of the present invention is to provide a method that enables the transmission of signals even if there is a faulty monitoring device in the middle of a distribution line by receiving a confirmation signal, etc., and allowing relay transmission.

Another object of the present invention is to provide a method for each monitoring device to relay and transmit a check signal to the end of the distribution line through IoT communication, and to determine that a failure has occurred at that location when relay transmission is not possible in the middle. intended to provide

Another object of the present invention is that even if there is a branch point in the middle of the distribution line, the inspection signal can be transmitted to the end of the branched distribution line of the distribution line, and the failure signal generated in the branched distribution line can be transmitted to the control server. The purpose is to provide a method.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. There will be.

A distribution line monitoring device failure determination method using the Internet of Things according to the present invention, which was created to achieve the above object, detects the location of a ground fault, disconnection or short circuit accident occurring in an overhead distribution line, and communicates with the Internet of Things. A distribution line monitoring system including a monitoring device installed at a predetermined distance or every predetermined span on the distribution line in order to transmit to the control server by automatically checking the operation status of each monitoring device to detect a faulty monitoring device. A finding method comprising: a first step of generating and transmitting, by the control server, an inspection signal having its own ID as calling information at regular time intervals; a second step in which, among the monitoring devices that have received the inspection signal, the transmission information of the inspection signal matches its upper ID, changing the transmission information of the received inspection signal to its own ID and relaying the transmission information; In the second step, the monitoring device that relayed and transmitted the inspection signal does not receive the inspection signal using its sub-ID as outgoing information for a certain period of time, or a third step of generating and transmitting a failure signal using its own lower ID as fault device identification information and its ID as outgoing information when the received signal strength is less than or equal to a predetermined standard; a fourth step in which, among the monitoring devices that have received the fault signal, the transmission information of the fault signal matches its own sub-ID, changing the transmission information of the received fault signal to its ID and relaying it; When the control server receives the failure signal, it uses the monitoring device installation information stored therein and the failure device identification information to display failure information including the location of the monitoring device where the failure occurred through an output means. Step 5; and when the control server generates and transmits the inspection signal in the first step, and the failure signal is not received after a predetermined time elapses, all of the monitoring devices installed in the distribution line operate normally. a sixth step of judging that it is to be determined and expressing the determination result through the output means; wherein the upper ID is an ID of a monitoring device installed on the control server side among monitoring devices adjacent to each of the monitoring devices, and the lower ID is the ID of the monitoring device installed on the side of the end monitoring device among the adjacent monitoring devices, the upper ID of the first monitoring device at the starting point of the distribution line is the ID of the control server, and the lower ID of the control server is the first ID of the second monitoring device, and each of the monitoring devices stores its ID, its upper ID and its own lower ID, and the monitoring device installation information includes an ID, upper ID, and lower ID for each of the monitoring devices ID and installation location are included, and the end monitoring device located at the end of the distribution line among the monitoring devices does not have its own sub-ID, does not perform the third step, and each of the control server or the monitoring device Each signal generated by further includes signal identification information capable of distinguishing each signal, and the monitoring device and the control server identify each signal using the signal identification information included in the received signal. It is preferable to use a distribution line monitoring device failure determination method using the Internet of Things, characterized in that it can be done.

The present invention also provides, in addition to the above features, after the control server generates and transmits the inspection signal, it does not receive the inspection signal with the ID of the first monitoring device as the calling information within a predetermined time, or When the received signal strength of the inspection signal with the ID of the first monitoring device as the outgoing information is less than the predetermined standard, the failure information including the location of the first monitoring device is expressed through the output means using the monitoring device installation information The seventh step; characterized in that it further comprises, it is also preferable to use the Internet of Things (IoT) as a failure determination method of a distribution line monitoring device.

The present invention also provides, in addition to the above-described features, in a state in which the monitoring device does not receive an inspection signal having its own higher ID as the outgoing information after receiving the check signal using its second highest ID as outgoing information. an eighth step of relaying and transmitting the outgoing information of the inspection signal using the second-highest ID as the outgoing information to the own ID when receiving a failure signal using the second highest ID as the calling information; and when the monitoring device does not receive a failure signal using its lower ID as the calling information for a certain period of time after receiving the failure signal using its lower lower ID as the calling information, A ninth step of relaying transmission by changing the origination information of the fault signal, which is the origination information, to its own ID, wherein the next higher ID is a higher ID of the monitoring device having the higher ID, and the lower ID is the It is a lower ID of a monitoring device having a lower ID, and each of the monitoring devices further stores its second higher ID and its second lower ID, and the next higher ID and the next lower ID for each of the monitoring devices are stored in the monitoring device installation information. It is also preferable to use a distribution line monitoring device failure determination method using the Internet of Things, characterized in that the ID is further included.

The present invention also provides, in addition to the above features, when the control server receives the location of the replacement device for replacing the faulty monitoring device and the ID of the replacement device, the monitoring device installation information A tenth generating and transmitting replacement signal that finds an upper ID and a lower ID, includes them as first information and second information, includes the ID of the replacement device as third information, and includes its own lower ID as incoming information, respectively step; Among the monitoring devices that have received the replacement signal, the monitoring device, whose incoming information of the replacement signal matches its ID, changes the incoming information of the received replacement signal to its own sub-ID, and relays the transmission, - own ID The monitoring device that matches the first information and the incoming information changes and stores its lower ID as the third information, and then relays and transmits the replacement signal, - its ID is the third information and the incoming information The monitoring device matching the information stores the first information and the second information as its upper ID and its own lower ID, respectively, and then relays and transmits the replacement signal, - its ID is the second information and A monitoring device matching the incoming information, an 11th step of changing and storing its upper ID as the third information; A monitoring device that has stored its ID, its parent ID, or its lower ID, or has changed or saved its own ID, its upper ID, and its lower ID, uses its upper ID as the incoming information in the setting information including its ID, its upper ID and its lower ID. a twelfth step of generating and transmitting the included change signal; a thirteenth step of relaying, by a monitoring device whose ID matches the incoming information of the changed signal among monitoring devices that have received the change signal, changing the incoming information of the changed signal to its own higher ID; and when the control server receives the change signal after transmitting the replacement signal, changing the monitoring device installation information according to the setting information; It is also preferable to use the Internet of Things as a method for judging a failure of a distribution line monitoring device, characterized in that it further comprises a.

The present invention also provides, in addition to the above features, when there is a junction in the middle of the distribution line, and the monitoring device is also installed in the branch line, - the monitoring device installed immediately before the junction has a plurality of lower IDs, - The junction It is also preferable to use the distribution line monitoring device failure determination method using the Internet of Things, characterized in that the monitoring device installed immediately before performs the third step and the fourth step for each of the plurality of sub-IDs.

As described above, according to the present invention, when the control server generates and transmits an inspection signal at regular time intervals, a monitoring device whose transmission information of the inspection signal matches its upper ID among the monitoring devices that receive it, receives the received inspection Since the transmission information of the signal is changed to its own ID and relayed, there is an effect that the inspection signal transmitted from the control server can be relayed and transmitted to the end of the distribution line located far away. Therefore, no matter how long the distribution line is, the inspection signal can be transmitted up to the end of the distribution line using IoT communication with a transmission distance that covers the maximum span length between poles (within 100 meters). That is, even if IoT communication having a transmission distance of several tens to hundreds of meters is used, there is an effect that inspection signals can be transmitted to the end of a distribution line ranging from several kilometers to several tens of kilometers.

In addition, in the present invention, when the monitoring device that relayed and transmitted the inspection signal does not receive the inspection signal whose sub-ID is the calling information for a certain period of time, its sub-ID is used as the fault device identification information and its own sub-ID is used as the fault device identification information. It generates and transmits a fault signal with the ID as the calling information. That is, the monitoring device that relayed and transmitted the inspection signal can determine whether the sub-monitoring device at the end adjacent to it relays and transmits the inspection signal relayed by it again, and the inspection signal from its sub-monitoring device is relayed. In case the signal cannot be received because of not being relayed, it means that the inspection signal relayed by the user is no longer relayed. It generates and transmits a signal. And, among the monitoring devices that have received the transmitted fault signal, the monitoring device (upper monitoring device) whose fault signal transmission information matches its lower ID changes the received fault signal transmission information to its own ID and transmits the relay. will do In other words, when a failure occurs in the distribution line monitoring device, the fact can be grasped during the transmission of the inspection signal, and if there is a faulty monitoring device, the upper level monitoring device detects it and transmits a fault signal and transmits the fault signal. As the upper monitoring device of one monitoring device relays and transmits it again, the fault signal can reach the control server, and accordingly, the control server has the effect of acknowledging the location of the faulty detection device.

Also, in the case of an inspection signal, only the monitoring device whose outgoing information matches its upper ID among the monitoring devices that received the inspection signal relays and transmits the inspection signal, and in the case of a failure signal, it is sent from among the monitoring devices that have received the fault signal. Since only the monitoring device whose information matches its sub-ID is relayed, even if a plurality of monitoring devices receive a check signal or a failure signal, relay transmission is not performed unless it is a signal to be relayed. Therefore, since each monitoring device does not transmit unnecessary signals, it is possible to prevent interference and malfunction due to simultaneous transmission of each signal from each monitoring device, as well as minimize power consumption for signal transmission. In the case of the monitoring device used, there is an effect of extending the replacement cycle of the monitoring device according to battery consumption. In addition, the transmission direction of the inspection signal can be transmitted only from the control server to the end of the distribution line, and the transmission direction of the fault signal can be transmitted only from the end of the distribution line to the control server. Therefore, the inspection signal transmitted from the control server is transmitted to the end of the distribution line, and the failure signal transmitted from the distribution line has the effect of being able to be received by the control server.

In addition, when the subordinate monitoring device does not receive the inspection signal relayed and transmitted, the received signal strength of the inspection signal relayed and transmitted by the own subordinate monitoring device (using its own sub-ID as outgoing information) is a certain standard. Since a fault signal is generated and transmitted even in the following cases, it is possible to identify a monitoring device whose transmission capability is lowered due to a performance problem such as a power failure or a transmission function. Therefore, even if the current state is not a broken state, it is possible to find out in advance the monitoring devices that are likely to break down soon and find out their location, which has the effect of pre-maintenance before the failure occurs. It is possible to achieve the effect of improving reliability.

In addition, in the present invention, the monitoring device receives the inspection signal having its second highest ID as the calling information, and after a certain period of time passes, in a state in which it does not receive the inspection signal with its own higher ID as the calling information, it is not received. In case of receiving a failure signal with the next higher ID of , as the outgoing information, the outgoing information of the inspection signal received from the next higher level monitoring device is changed to its own ID and relayed. Therefore, when one of the monitoring devices fails, the upper monitoring device of the faulty monitoring device generates and transmits a fault signal, and at the same time, the lower monitoring device of the faulty monitoring device continues the inspection signal sent by the monitoring device that sent the fault signal. Therefore, the fault signal is transmitted to the control server and the inspection signal is continuously transmitted to the end of the distribution line.

In addition, if the failure signal with the lower-level ID as the originating information is not received after a certain period of time after receiving the failure signal using the lower-level ID as the originating information, the failure signal received from the lower-order monitoring device is not received. Since the outgoing information is changed to its own ID and relayed, even if one of the monitoring devices fails and the relay transmission of the fault signal becomes impossible, the fault signal is received from the subordinate monitoring device located immediately before it and relayed has the effect of being able to

Therefore, even if several monitoring devices are broken on one distribution line, the inspection signal can be transmitted to the end of the distribution line, and the fault signals generated and transmitted by the upper level monitoring devices of the faulty monitoring devices in the process of transmission are All data can be transferred to the control server. And if this configuration is expanded not only to the next higher and lower levels, but also to the next higher and lower levels, it is possible to transmit the inspection signal and the failure signal as much as possible even if the two monitoring devices fail in succession.

And, if a malfunctioning monitoring device is found during regular automatic inspection and replacement is performed, the control server sends a replacement signal when the location and ID of the newly replaced monitoring device are input, and the replacement signal is sent to the end. During the relay, when the newly replaced monitoring device and the front and rear monitoring devices of the newly replaced monitoring device are reached, the corresponding monitoring devices identify and store the upper ID and lower ID, which are the IDs of their front and rear monitoring devices, so that they can be stored. Not only can the monitoring device automatically identify and store the IDs of nearby monitoring devices with which it communicates, but also the replaced monitoring devices and adjacent monitoring devices can automatically identify and store the IDs of the replaced monitoring devices. . Therefore, when replacing the monitoring device, it is not necessary to identify the upper ID and lower ID for the replacement monitoring device and upper and lower IDs and input them in advance, thereby reducing the time, effort and cost of maintenance and management. There is a saving effect.

In addition, when the replaced monitoring device and the monitoring devices in front of and behind it have saved their ID, their parent ID, or their lower ID, or have changed or saved their ID, their own upper ID and their lower ID It generates and transmits a change signal including its own upper ID as the incoming information in the included setting information, and among the monitoring devices that have received the change signal, the monitoring device whose ID matches the incoming information of the change signal, Because the incoming information is changed to its own upper ID and relayed, the change signal can reach the control server, and the control server checks whether the settings for the replaced monitoring device and the monitoring devices in front of and behind it are normally completed. There is a discernible effect.

The present invention also provides that when there is a junction in the middle of the distribution line and monitoring devices are installed in the branch line, the monitoring device installed just before the junction has a plurality of lower IDs, and the monitoring device installed just before the junction has a plurality of The failure signal is transmitted by determining whether there is a failure for each sub-ID, and relayed out even when each failure signal transmitted or transmitted by a plurality of monitoring devices is relayed, so check even if there is a branch point in the middle of the distribution line The signal can be transmitted to the end of the branched distribution line of the distribution line, and there is an effect that the fault signal generated in the branched distribution line can be transmitted to the control server.

The present invention also allows each monitoring device to send and receive signals only to the closest monitoring devices located in the front and rear, and not to send and receive signals to and from the skipped or distant monitoring devices, even if the signal arrives. , minimizes the occurrence of a transaction to find a route through which the transmitted signal is transmitted, and simplifies the routing path determination process, thereby reducing power consumption and reducing power consumption through short-distance transmission. Therefore, since it is possible to make the monitoring device a low-power device, if the battery is built-in, the maintenance cost can be reduced by using it for a long time without replacing the battery.

1 is a conceptual diagram of an overhead distribution line (a) and a distribution line monitoring device (b) to which the present invention is applied.
2 is a diagram illustrating a concept in which a distribution line monitoring system transmits a signal through monitoring devices.
3 is a flowchart illustrating an inspection signal and a failure signal being transmitted through the monitoring devices.
4 is a flowchart illustrating an operation process of a monitoring device that has received an inspection signal or a failure signal.
5 is a diagram illustrating a concept in which a monitoring device transmits signals to and from the next higher or lower level monitoring devices.
6 is a flowchart illustrating an operation process of the monitoring device when a check signal is received from the next higher level monitoring device.
7 is a flowchart illustrating an operation process of the monitoring device when a failure signal is received from the subordinate monitoring device.
8 is a flowchart illustrating a signal transmission between monitoring devices when a replacement signal is transmitted.
9 is a flowchart illustrating an operation process of a monitoring device that has received a replacement signal or a change signal.
10 illustrates a concept in which a signal is transmitted through monitoring devices when there is a junction in the distribution line.

Hereinafter, the present invention will be described in detail so that the above-described objects and features become clear, and accordingly, those skilled in the art to which the present invention pertains will be able to easily implement the technical idea of the present invention. In addition, in the description of the present invention, if it is determined that the detailed description of the known technology may unnecessarily obscure the gist of the present invention as it is already well known in the technical field among the known technologies related to the present invention, the detailed description is given. to be omitted.

In addition, the terms used in the present invention have been selected as widely used general terms as possible, but in certain cases, there are also terms arbitrarily selected by the applicant, and in this case, the meaning is described in detail in the description of the corresponding invention, so it is a simple term It is intended to clarify that the present invention should be understood as the meaning of the term, not the name. Terms used in the description of the embodiments are only used to describe specific embodiments, and are not intended to limit the embodiments. The singular expression includes the plural expression unless the context clearly dictates otherwise.

Embodiments may be modified in various forms and may have various additional embodiments, in which specific embodiments are shown in the drawings and related detailed descriptions are given. However, this is not intended to limit the embodiments to specific forms, and it should be understood to include all changes or equivalents or substitutes included in the spirit and scope of the embodiments.

In the description of various embodiments, expressions such as “first”, “second”, “first” or “second” may modify various components of the embodiments, but do not limit the corresponding components. For example, the above expressions do not limit the order and/or importance of corresponding components. The above expressions may be used to distinguish one component from another.

Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention detects the location of occurrence of a ground fault, disconnection, or short circuit accident occurring in an overhead distribution line and transmits it to a control server through Internet of Things (IoT) communication. A distribution line monitoring system including a device is a method for detecting a faulty monitoring device by checking the operating state of each monitoring device. 1(a) is a conceptual diagram of an overhead distribution line to which the 'distribution line monitoring device failure determination method using the Internet of Things' according to the present invention is applied. The present invention is a distribution line monitoring device that can measure, collect, and transmit current for each phase on an overhead distribution line 10 consisting of an electric pole 20 and an overhead wire 30, as shown in FIG. 1 (a). 100 (hereinafter referred to as a monitoring device) is applied to the distribution line monitoring system 50 which is repeatedly installed for each predetermined section. Here, it is preferable to install the predetermined section by a certain distance or the span in which the electric pole 20 is installed. If a communication method that can cover a relatively long distance (more than several hundred meters) is used, it will be possible to install at intervals of several electric poles 20 in consideration of the communication reach. However, the present invention is applied to the distribution line monitoring system 50 for monitoring whether an accident has occurred throughout the distribution line 10 and accurately grasping the location when an accident occurs, and in the middle of the distribution line 10 Since there are many branch points to consumers or other distribution lines, it is also preferable to install them for each span in which each electric pole 20 is installed as much as possible.

1 (b) is a conceptual diagram of the distribution line monitoring device 100 coupled to the overhead wire 30 of the distribution line 10 is shown. Each of the monitoring devices 100 is preferably made of a set of three devices 100a, 100b and 100c installed while each wrapping the overhead wire 30 of each phase of the distribution line 10, respectively. And among the three devices, the second device and the third device 100b and 100c measure the current flowing in the installed wire while they are wrapped around them, and include this in the IoT signal and transmit it (Sa, Sb), and the remaining devices The first device 100a receives the IoT signal transmitted from the other devices 100b and 100c, and at the same time (Sa, Sb) measures the current flowing through the installed wire, and is together with the current value of the other wire for a certain period of time. It is desirable to be able to store it at intervals. In addition, the first device 100a generates and transmits an IoT signal including the current value stored therein when a line accident occurs or when the control server 200 (refer to FIG. 2) requests it (S). -1, S-2) A signal transmitted from the other monitoring device 100 or the control server 200 is received while allowing reception from the other monitoring device 100 or the control server 200 (refer to FIG. 2). After (S-1 → S-2), it is preferable to relay the received signal (S-2 → S-1).

Therefore, each of the second device 100b and the third device 100c of the monitoring device 100 is a power supply capable of operating them together with the current transformer 110 , the measuring means 120 , and the wireless transmitting means 140 . It is preferable to include a supply means (160). As shown in FIG. 1(b), the current transformer 110 has a coil wrapped around the conductor of the overhead wire 30 to create an induced current from the current flowing into the overhead wire 30. desirable. And it is preferable that the measuring means 120 measures a current value flowing through the overhead wire 30 using the induced current flowing through the current transformer 110 . In addition, the wireless transmission means 140 includes information for identifying each of the second device 100b and the third device 100c in the measured current value and transmits the information as a wireless signal to the first device 100a ) to be able to receive it. It is preferable to transmit the wireless signal in a short-distance IoT communication method such as BLE (Bluetooth Low Energy), etc., in the form of a beacon signal transmitter that transmits the BLE signal including the current value at regular time intervals. more preferably. Since the signal transmitted from each of the second device 100b and the third device 100c can be received by the first device 100a installed in a short distance, it can reach only a few meters. It is possible as long as it is possible, so there is no need for a large transmission output. And the power supply means 160, it is preferable to use a battery. In the case of using a low-power IoT communication method such as BLE when using a battery, it is possible from several years to 10 years. However, since it is possible to do more than that when the current induced in the current transformer is directly used as a power source or the battery is charged using the current, it is also preferable to charge the battery using the current induced in the current transformer.

Meanwhile, the first device 100a of the monitoring device 100 includes a storage means 130 in addition to the current transformer 110 , the measuring means 120 , the wireless transmitting means 140 , and the power supplying means 160 . ), it is preferable to further include a wireless receiving means 150 and a control means (170). However, the wireless transmission means 140 of the first device 100a is different from the wireless transmission means 140 of the second device 100b and the third device 100c, the other monitoring device 100 and the control Since it is necessary to transmit a signal that can be received by a device located at a relatively long distance such as the server 200, the transmission output is higher than that of the wireless transmitting means 140 of the second device 100b and the third device 100c. should be However, since each of the monitoring devices 100 included in the present invention is preferably installed for each span unit of the distribution line 10, it is possible to transmit about 100 meters, which is the maximum distance of one span of the distribution line 10. It is preferable to use the Internet of Things (IoT) communication method. And the wireless receiving means 150 of the first device 100a is not only a means necessary for receiving the signals transmitted by the second device 100b and the third device 100c, but also other monitoring devices ( 100) or a means necessary for receiving a signal transmitted from the control server 200 . Therefore, the wireless receiving means 150 of the first device 100a must be able to receive a signal transmitted from a short distance like the second device 100b and the third device 100c, and the other monitoring device 100 ) or a signal transmitted from a relatively long distance, such as the control server 200, must be able to be received. Therefore, the wireless transmitting means 140 and the wireless receiving means 150 included in the first device 100a also receive the signals transmitted from the second device 100b and the third device 100c, while monitoring the As a wireless communication means capable of exchanging information between devices 100 or between the monitoring device 100 and the control server 200, it is used for IoT communication, not a commercial wireless communication network or commercial Internet of Things network. It is desirable to connect through an ad-hoc network that is used, but it is preferable to use BLE communication or Zigbee or Wifi that can cover up to 100 ~ 200m in consideration of the span of the distribution line. It is of course possible to use the IoT communication method using LPWA (Low-Power Wide Area Network) such as Sigfox or LoRa, but it is not necessary to use a commercial communication network.

And it is preferable that the control means 170 included in the first device 100a is a component that controls the overall configuration included in the monitoring device 100, for example, generation of information to be transmitted. and change, judgment on the type of received signal, and operation control accordingly. And the control means 170, the current value measured by the measuring means 120 and the current value included in the signal received from the second device 100b and the third device 100c with the measurement time It is preferable to continue to store them together in the storage means 130 . In the case of storing the current value and the measurement time in the storage means 130, when the storage capacity is full in consideration of the limit of the storage capacity of the storage means 130, the first recorded data is overwritten. It is preferable to do And, it is preferable that the storage means 130 stores its own identification information (ID) for each monitoring device 100 . Here, the unique identification information (ID) is an ID that is differently assigned to each of the monitoring devices 100 . And the storage means 130 is preferably a semiconductor device in consideration of weight, power consumption, etc., the measuring means 120, the storage means 130, the wireless transmitting means 140, the wireless receiving means. 150, the power supply unit 160, and the control unit 170 are preferably accommodated in the storage space 101 connected to the current transformer 110 as shown in FIG. 1(b). Do.

As described above, the monitoring device 100 is operated as a set of the first device 100a, the second device 100b, and the third device 100c. However, the reception of a signal from the other monitoring device 100 or the transmission of a signal that can be received by the other monitoring device 100 is performed by the wireless receiving means 150 or the wireless transmitting means included in the first device 100a. (140), the control according to the received signal, the storage of the current value, etc. are also made by the control means 170 and the storage means 130 included in the first device 100a. However, in the following description, control, reception, or transmission performed by the first device 100a will be expressed as being performed by the monitoring device 100 for convenience of description.

On the other hand, FIG. 2 shows an overview of a distribution line monitoring system 50 to which an embodiment of the 'distribution line monitoring apparatus failure determination method using the Internet of Things' according to the present invention is applied, and signals are transmitted between the monitoring apparatuses 100. The concept is shown. As shown in FIG. 2 , it is preferable to include the control server 200 in the distribution line monitoring system 50 to which the present invention is applied. And in this embodiment, the control server 200 is the closest one of the monitoring devices 100, the first monitoring device at the starting point of the distribution line 10, the monitoring device 1 (100-1). It is desirable to send and receive signals only to Therefore, the signal transmitted from the control server 200 may cover only the distance to the monitoring device 1 ( 100 - 1 ). Therefore, there is no need for a communication method that covers a long distance, and BLE communication having a communication distance that can sufficiently cover only one or two spans of the distribution line 10 is sufficient. Of course, the signal transmitted from the control server 200 may be transmitted even to a distance beyond the first monitoring device, the first monitoring device, 100-1, and the second or third, monitoring device 2 (100-2) or Although even the monitoring device 3 (100-3) may be reached, in this embodiment, it is preferable that the control server 200 sends and receives signals only with the first monitoring device, the 1 (100-1) monitoring device. .

It is also preferable to include a wireless gateway or a wireless router (not shown) between the control server 200 and the monitoring device 1 ( 100 - 1 ). In this case, the control server 200 transmits the signal it generates to a wireless gateway or wireless router (not shown) by wire, and the wireless gateway or wireless router (not shown) that receives the signal transmits it wirelessly. The wireless gateway or wireless router (not shown) wirelessly receives the signal transmitted from the monitoring device 1 ( 100 - 1 ) and transmits it to the control server 200 by wire. That is, a wireless gateway or wireless router (not shown) is installed at the point where the distribution line 10 starts, and from the wireless gateway or wireless router (not shown) to the control server 200 through a commercial wired or wireless communication network. After the connection is made, the control server 200 communicates with the monitoring device 1 100-1 through the wireless gateway or wireless router (not shown).

And also, it is preferable to further include a line accident detection system 300 in the distribution line monitoring system 50 to which the present invention is applied. The line accident detection system 300 is connected to a ground fault relay, an overload relay, or a phase loss relay installed in a distribution substation, etc. to immediately detect the occurrence of an accident when a ground fault, short circuit, or disconnection accident occurs and informs the control server 200. It is preferable to set it as a system. That is, the line accident detection system 300 is a highly reliable professional monitoring device that detects the occurrence of an accident using a ground fault relay, an overload relay or a phase loss relay, etc., and the accident time when a line accident occurs on the distribution line 10 . It is preferable to transmit accident information including a to the control server 200 . When receiving the accident information from the line accident detection system 300, the control server 200 transmits an accident signal to collect the current value flowing on the distribution line from the monitoring devices 100. more preferably. In addition, the monitoring devices that have received the accident signal relay and transmit the accident signal toward the end of the distribution line and create and transmit a status signal including the current value collected and stored by the monitoring devices, and the monitoring devices receiving the status signal are configured to transmit the status signal. It is preferable that the signal is relayed to the control server, and the control server receiving the status signal analyzes the status signal to determine the location of the accident.

That is, as shown in FIG. 2 , in the signal transmission in the distribution line monitoring system 50 to which the present invention is applied, the control server 200 receives accident information from the line accident detection system 300, etc. By the information input, the signal generated by the control server 200 is relayed through all the monitoring devices 100 in turn, and then the monitoring device 100 installed at the end of the distribution line 10 is a terminal monitoring device ( 100-z), or the signal generated by the end monitoring device 100-z is relayed through all the monitoring devices 100 in turn, and then it is preferable to reach the control server 200 Do. In addition to this, it is preferable that the signal generated by each monitoring device 100 also passes through the monitoring devices 100 in order to reach the control server 200 . And, when each monitoring device 100 receives and relays a signal, in this embodiment, receiving and relaying signals from adjacent monitoring devices 100 in the front and rear directions around their location is allowed and, in other cases, it is preferable not to allow it. However, in other embodiments to be described later, other cases may be permitted.

FIG. 3 is a flowchart illustrating transmission of an inspection signal, a confirmation signal, and a failure signal through the monitoring devices 100 in a method for judging a failure of a distribution line monitoring apparatus using the Internet of Things according to the present invention. In the present invention, the monitoring device has a poor transmission or reception function, or a monitoring device whose transmission performance has deteriorated is determined as a failure. This is because the present invention relates to long-distance communication through communication between adjacent monitoring devices through the Internet of Things (IoT) communication. Because. In the following description, the term 'failure' refers to a state in which the monitoring device 100 is unable to transmit/receive or has reduced transmission performance, unless otherwise specified.

As described above, the present invention detects the location of a ground fault, disconnection or short circuit accident occurring in the overhead distribution line 10, and transmits it to the control server through IoT communication. The distribution line monitoring system 50 including the monitoring device 100 installed at every distance or a certain span checks the operating state of each of the monitoring devices 100 to find the faulty monitoring device 100. it's about In the following description, the upper ID is the ID of the upper monitoring device that is the monitoring device 100 installed on the control server 200 side among the other monitoring devices 100 adjacent to each of the monitoring devices 100, and the lower ID is the monitoring device 100 It refers to a lower monitoring device ID that is a monitoring device 100 installed at the terminal side of a distribution line among other monitoring devices 100 adjacent to each of the devices 100 . In addition, the monitoring device 100 installed at the end of the distribution line, that is, the most distal end, is referred to as the termination monitoring device 100-z.

On the other hand, each of the monitoring device 100 stores its own ID, its own high-order ID, and its own low-level ID, and it is preferable that the control server 200 includes monitoring device installation information. It is preferable that the installation information includes an installation location and ID for each of the monitoring device 100, an upper ID, and a lower ID. It is more preferable that the installation position also includes the installation order of the monitoring device. And the upper ID of the first monitoring device 100-1 at the starting point of the distribution line 10 is the ID of the control server 200, and the lower ID of the control server 200 is the first monitoring device It is preferable to use the ID of (100-1), and it is preferable that the end monitoring device 100-z includes its own ID and its upper ID, but does not have its own lower ID. In addition, each signal generated by each of the control server 200 or the monitoring device 100 further includes signal identification information capable of distinguishing each signal, and the monitoring device 100 and the control server ( 200) is preferably used to identify each signal using the signal identification information included in the received signal.

As shown in FIG. 3 , in the present invention, first, the control server 200 generates an inspection signal using its ID as outgoing information at regular time intervals (s102), and then transmits the inspection signal to IoT communication. It is preferable to perform the first step of sending (s102). Here, the predetermined time interval refers to, for example, 8-hour intervals or 24-hour intervals by setting them to be performed at a predetermined time during the day. When the control server 100 generates and transmits the inspection signal, the monitoring devices 100 may receive the inspection signal. The first monitoring device located at the starting point of the distribution line 10 is It is preferable to enable the monitoring device 1 ( 100 - 1 ) to receive the inspection signal. Therefore, the distance between the control server 200 or the wireless gateway or wireless router connected to the control server 200 and the monitoring device 1 (100-1) or the distance between the monitoring devices 100 is the transmission of the inspection signal It is desirable to be within the distance.

And, among the monitoring devices 100 that have received the inspection signal, the monitoring device 100 in which the transmission information of the inspection signal matches its upper ID, changes the transmission information of the received inspection signal to its ID, and then (s103), it is preferable to perform the second step of relaying and transmitting (s104) a check signal whose outgoing information is changed to its ID. Accordingly, the monitoring device 1 ( 100 - 1 ), which has received the inspection signal generated and transmitted by the control server 200 in the first step, matches the origination information of the inspection signal with its upper ID. After changing the signal transmission information to the ID of the monitoring device 1 (100-1), which is its ID (s103), the changed inspection signal is relayed and transmitted (s104).

Meanwhile, the inspection signal transmitted from the control server 200 may reach not only the monitoring device 1 100-1 but also the monitoring device 2 100-2 or the monitoring device 3 100-3. However, the transmission information of the inspection signal transmitted by the control server 200 is the ID of the control server 200, and the ID of the control server 200 is the same as the upper ID of the monitoring device 1 (100-1). , the upper ID of the second monitoring device 100-2 is the same as the ID of the first monitoring device 100-1, and the upper ID of the third monitoring device 100-3 is the second monitoring device 100-2 ), only the monitoring device 1 (100-1) is relayed out of the monitoring devices 100 that have received the inspection signal transmitted from the control server 200.

On the other hand, the monitoring device 1 (100-1), the monitoring device 2 (100-2) in which the outgoing information matches its upper ID among the monitoring devices that have received the inspection signal relayed and transmitted by changing the outgoing information to its own ID ), after changing the transmission information of the received inspection signal to the ID of the monitoring device 2 (100-2), which is its ID (s103), relays and transmits the inspection signal in which the transmission information is changed again (s104). In this way, the inspection signal arrives at the end monitoring device 100-z by continuous relaying of the monitoring devices 100 . However, even if the end monitoring device 100-z relays and transmits the check signal, there is no monitoring device using the ID of the end monitoring device 100-z as the upper ID, so the check signal is no longer relayed. It stops at the end monitoring device (100-z).

In this way, while the inspection signal proceeds toward the end monitoring device 100-z by the relay of the monitoring devices 100, the monitoring device 100 relaying and transmitting the inspection signal in the second step is delayed for a certain period of time. In case the received signal strength is less than a certain standard (s121, s122), or received a check signal using one's own sub-ID as outgoing information (s121, s122), but the received signal strength is below a certain standard ( s121, s123), it is preferable to perform the third step of generating and transmitting (s124) a failure signal using its own sub-ID as fault device identification information and its ID as outgoing information. For example, when the monitoring device 2 100-2 relays and transmits the inspection signal (s104), the monitoring device 3 100-3 fails to relay and transmit the relay signal it sends for a certain period of time. The transmission function or reception function of the monitoring device 3 (100-3) is broken, and relay transmission is performed, but if the reception signal strength is below a certain standard, the transmission performance is deteriorated or the power is weakened, so it will soon fail due to battery discharge, etc. It means that the chances are high. Therefore, the monitoring device 2 (100-2) considers that the monitoring device 3 (100-3) has failed, and sets the ID of the monitoring device 3 (100-3) as the faulty device identification information, and sets its ID as the calling information. A fault signal is generated and transmitted. That is, in the present invention, if the subordinate monitoring device 100 cannot relay and transmit the relay signal sent by the user for a certain period of time, the subordinate monitoring device is regarded as a failure or imminent failure monitoring device and the ID of the subordinate monitoring device 100 It generates and transmits a failure signal using

However, since the end monitoring device 100-z located at the end of the distribution line 10 among the monitoring device 100 does not have a lower monitoring device, the third step of transmitting the failure signal is not performed. it is preferable And, in the case of the first monitoring device of the distribution line 10, the monitoring device 1 (100-1), since the control server 200 corresponds to the upper monitoring device, the control server 200 receives the inspection signal. After generating and transmitting, the inspection signal with the ID of the monitoring device 1 ( 100-1 ) as the calling information is not received within a certain time, or the ID of the monitoring device 1 ( 100-1) as the calling information When the received signal strength of the inspection signal is less than the predetermined standard, it is preferable to use the monitoring device installation information to display failure information including the location of the monitoring device 1 ( 100 - 1 ) through an output means.

On the other hand, it is more preferable that the failure signal further includes 'failure occurrence type information' in addition to the failure device identification information and the outgoing information. In other words, if the inspection signal with its own sub-ID as outgoing information is not received after a certain period of time, the failure type information is set to 'relay impossible', and although the inspection signal is received, the received signal strength is below a certain standard. In this case, if the failure type information is set to 'performance degradation', there is an advantage in determining whether the malfunctioning monitoring device needs to be replaced immediately or can be replaced soon.

And, among the monitoring apparatuses 100 that have received the failure signal, the monitoring apparatus 100 in which the origination information of the failure signal matches its own sub-ID changes the received failure signal origination information to its own ID. , it is preferable to perform the fourth step of relaying and transmitting the changed fault signal (s125). That is, when the monitoring device 2 ( 100 - 2 ) generates and transmits a fault signal containing information indicating that the monitoring device 3 ( 100 - 3 ) has failed, the outgoing information included in the fault signal is transmitted to the monitoring device 2 ( 100 ). -2), and among the monitoring devices 100 that have received the failure signal, the monitoring device 1 ( 100 - 1 ) has the same lower ID as the ID of the monitoring device 2 ( 100 - 2 ), The fault signal is relayed and transmitted, and when the fault signal is relayed, the transmission information is changed to its own ID and relayed. In this way, the failure signal generated and transmitted by any one monitoring device 100 installed in the distribution line 10 is transmitted to the control server 200 by continuous relay transmission of the monitoring devices 100. will be reached

In addition, when the control server 200 receives the failure signal transmitted or relayed by the monitoring device 1 100-1, the monitoring device installation information stored therein and included in the fault signal After identifying the faulty monitoring device 100 using the faulty device identification information, the fifth step of displaying fault information including the location of the faulty monitoring device through an output means is performed, and the control server (200), after generating and transmitting the inspection signal in the first step, when the failure signal is not received after a predetermined time elapses, the monitoring device 100 installed in the distribution line 10 It is preferable to perform the sixth step of determining that all of them operate normally, and expressing the determination result through the output means.

4 is a flowchart illustrating an operation process of a monitoring device that has received an inspection signal or a failure signal. Hereinafter, the above-described method for judging a failure of a distribution line monitoring device using the Internet of Things according to the present invention will be described from the perspective of each monitoring device 100 . As shown in FIG. 4 , when the monitoring device 100 receives a signal, the control means 170 included in the monitoring device 100 uses the signal identification information included in the received signal to control the signal. The type is identified (s201), and if the received signal corresponds to the inspection signal (s210), it compares whether the outgoing information included in the inspection signal is the same as its upper ID (s211), and does not match In this case, it terminates (in another embodiment to be described later, other operations are performed without termination), and in case of a match, the outgoing information included in the received inspection signal is changed to its own ID (s212), and then the changed inspection signal It is preferable to relay and transmit (s213).

Then, the monitoring device 100 relays and transmits the check signal in the process s213, and then checks whether its own sub-ID exists in order to check whether it corresponds to the end-of-end monitoring device 100-z. (s214), if its own sub-ID exists, since it is not a terminal monitoring device, after checking whether the inspection signal transmitted by the other monitoring device 100 is received within a predetermined time (s215 ~ s216), receive When the outgoing information included in the checked inspection signal matches its own sub-ID (s217) and the received signal sensitivity of the received inspection signal exceeds a certain standard (s217a), the inspection signal relayed by the user is transmitted to the subordinate ID (s217). Since it corresponds to the case where the monitoring device normally relayed and transmitted, it is desirable to terminate it without further operation.

However, as a result of checking in step s214, if its own sub-ID does not exist, since it corresponds to the end monitoring device 100-z, it is preferable to terminate without further operation. And, in the process s215 to s216, for a certain period of time, even if the outgoing information does not receive an inspection signal matching its lower ID (s217) or receives an inspection signal matching its lower ID, the received signal strength When (RSSI) is less than a certain standard (s217a), after generating a failure signal with its own sub-ID as the fault device identification information and its ID as the calling information (s218), the generated fault signal is transmitted (s219) is preferable.

And as a result of identifying the signal received in the process s201, if the received signal corresponds to the failure signal (s220), it compares whether the outgoing information included in the failure signal is the same as its lower ID (s221) , if they do not match, terminate (in another embodiment to be described later, perform other operations without termination), if they match, change the calling information included in the received fault signal to your ID (s222) , it is preferable to relay and transmit the changed fault signal (s223).

On the other hand, in the present invention, as described above, it is preferable that each monitoring device 100 receives and operates only a signal transmitted from its own higher-level monitoring device or a lower-level monitoring device, but each monitoring device 100 has its own It is also desirable to receive and operate the signal transmitted from the next higher level monitoring device or the lower level monitoring device. FIG. 5 shows the concept of the present embodiment in which the monitoring device 100 receives a signal from the next higher or lower level monitoring devices. In this embodiment in which the monitoring device 100 also receives signals transmitted by the next higher or lower level monitoring devices, the second highest ID is the upper ID of the monitoring device having the upper ID, and the lower ID is the monitoring having the lower ID. Refers to the sub-ID of the device. And in this embodiment, each of the monitoring devices has its own next higher ID and its next lower ID stored therein, and the monitoring device installation information further includes the next higher ID and the next lower ID for each of the monitoring devices. It is preferable to do

In this embodiment, each of the control server 200 and the monitoring device 100 can receive at least a signal transmitted from at least the next higher level monitoring device and the next lower level monitoring device, and vice versa, the control server 200 or It is preferable that the signal transmitted by the monitoring device 100 can be received by the next higher level monitoring device and the next lower level monitoring device. Therefore, as shown in FIG. 5, for example, the signal transmitted from the monitoring device 2 (100-2) can be received by the monitoring device 1 (100-1) as well as the control server 200 toward the upper side. It is preferable to set the signal strength enough to be able to receive the signal strength enough to be received by the monitoring device 3 (100-3) as well as the monitoring device 4 (100-4) on the lower side. Of course, it is also possible to enable reception at a distance beyond that. However, in this embodiment, one monitoring device 100 operates only when receiving a signal transmitted from its own higher level monitoring device, the next higher level monitoring device, the lower level monitoring device, and the second lower level monitoring device, and it is transmitted from the other monitoring devices. It is desirable to ignore the signal when receiving the signal.

As shown in FIG. 5, the next higher level monitoring device of the monitoring device 2 (100-2) will be the control server 200, and the lower level monitoring device will be the monitoring device 4 (100-4), so the monitoring device 2 ( The next higher ID of 100-2) is the ID of the control server 200, and the next lower ID is the ID of the monitoring device 4 (100-4). In the present embodiment, the monitoring device 100 receives the inspection signal using its second-highest ID as outgoing information, and then fails to receive the check signal using its own higher-order ID as outgoing information In the case of receiving a failure signal with the originating information of , the eighth step of changing the origination information of the inspection signal using the second-highest ID as the origination information to one's own ID and relaying the transmission is performed, and the monitoring device 100 ), if it does not receive a failure signal with its lower-level ID as the calling information for a certain period of time after receiving a failure signal with its lower-level ID as the calling information, use its lower-level ID as the calling information It is preferable to further perform the ninth step of relaying transmission by changing the transmission information of the fault signal to its own ID.

Hereinafter, with reference to FIGS. 6 and 7 , in this embodiment, each monitoring device 100 can also receive a signal transmitted from its own higher level monitoring device or a lower level monitoring device, each monitoring device 100 ) explains how they work. 6 is a flowchart illustrating an operation process of the monitoring device when receiving an inspection signal from the lower-level monitoring device, and FIG. 7 is a flowchart illustrating the operation process of the monitoring device when receiving a failure signal from the lower-level monitoring device. . Here, FIG. 6 is connected to the connection points A, A' and A'' of FIG. 4, and FIG. 7 is connected to the connection points B and B' of FIG.

First, as shown in FIG. 6 , the monitoring device 100 receiving the confirmation signal, when the origination information of the confirmation signal does not match its upper ID (s211, refer to the connection point A in FIG. 4), the It is compared whether the transmission information of the confirmation signal is consistent with its next higher ID (s2111). And, if the origination information of the confirmation signal does not match even with its second higher ID, it is terminated, and as a case of matching, if a confirmation signal with its higher level ID as the origination information is received within a certain time (s2112) ~ s2113), to perform the process after s212 (refer to connection point A' in Fig. 4), and after a certain period of time (s2113), in a state in which the confirmation signal with its upper ID as the calling information is not received, the self In the case of receiving a failure signal from the next higher level monitoring device of (s2114), it is determined that the own higher level monitoring device has failed, and after changing the transmission information of the confirmation signal received from its second higher level monitoring device to its ID (s2116) ), it is preferable to relay and transmit the changed confirmation signal (s2116). In other words, if the higher level monitoring device fails to receive the confirmation signal from the upper level monitoring device, the second higher level monitoring device relays and transmits the confirmation signal. And it is preferable to perform the process after the process s214 (see connection point A'' in FIG. 4).

And, as shown in FIG. 7 , when the received signal is a failure signal, and the origination information of the failure signal does not match its lower ID (s221, refer to connection point B in FIG. 4), the origination information of the failure signal compares whether or not it matches its subordinate ID (s2111), and ends when the origination information of the failure signal does not match even its lower descendant ID, and when the origination information matches its subordinate ID, In the case of receiving a failure signal with its own sub-ID as outgoing information within a certain time (s2212 ~ s2213), the process after s222 is performed (refer to connection point B' in FIG. 4), and a certain time passes ( s2113) If it does not receive a fault signal with its own sub-ID as outgoing information (s224), it is determined that its sub-monitoring device is faulty, and the transmission information of the fault signal received from its sub-subordinate monitoring device is determined by itself. After changing to the ID of (s2214), it is preferable to relay the changed fault signal (s2215). In other words, if the subordinate monitoring device fails to receive a failure signal from the subordinate monitoring device, the fault signal sent by the subordinate monitoring device is relayed.

On the other hand, FIG. 8 shows a signal transmission flow chart between the monitoring devices when the monitoring device 100 is replaced and a replacement signal is transmitted from the control server, and FIG. 9 is a monitoring device receiving the replacement signal or the change signal. It is a flowchart showing the operation process of As described above, in the present invention, by sending the inspection signal from the control server 200, it is possible to identify a faulty monitoring device or a degraded monitoring device. Monitoring devices identified as malfunctioning through such automatic inspection need to be replaced with new monitoring devices. If a new monitoring device is replaced, the new monitoring device must have a different ID from the previous monitoring device, so communication between monitoring devices is required. For this purpose, the newly replaced monitoring devices as well as the monitoring devices located in the front and back must identify and store each other's ID. In the present invention, for this purpose, the replacement device automatically detects and stores the identification information (ID) of the monitoring devices located in front of and behind itself, and the monitoring devices located in front and behind of the monitoring device to be replaced are the front or rear of their own. It provides a method to automatically change IDs for monitoring devices to those of newly replaced monitoring devices. This will be described with reference to FIGS. 8 and 9 .

First, as shown in FIG. 8 (replacing the monitoring device 3, which is the third monitoring device, as an example), if there is a newly replaced monitoring device among the monitoring devices installed on the distribution line, the newly replaced monitoring device 3 (100-3), that is, it is preferable to input the location information and ID of the replacement device 100-3 to the control server 200 (s301). Here, it is preferable that the position information on the replacement device 100-3 is order information. That is, the replacement device 100-3 is to input the position of the replacement device on the distribution line, which can be easily obtained from the monitoring device installation information. Accordingly, when the control server 200 receives the location of the replacement device 100-3, which is the newly replaced monitoring device, and the ID of the replacement device 100-3, the replacement device from the monitoring device installation information The upper ID and lower ID of (100-3) are found and included as first information and second information, the ID of the replacement device 100-3 as third information and its lower ID as incoming information, respectively After generating the replacement signal including (s302), it is preferable to perform the tenth step of transmitting the replacement signal (s304). Here, the upper ID of the replacement device 100-3 will be the ID of the monitoring device 2 100-2, and the lower ID of the replacement device 100-3 is the ID of the monitoring device 4 100-4. will be And the incoming information included in the replacement signal will be the ID of the monitoring device 1 (100-1).

And, the monitoring device 100 whose ID matches the incoming information among the monitoring devices 100 receiving the replacement signal changes the incoming information included in the replacement signal to its own sub-ID (s303) It is preferable to relay the replacement signal (s304). Therefore, the monitoring device 1 (100-1) among the monitoring devices that received the replacement signal sent by the control server 200 relays and transmits the replacement signal because its ID matches the incoming information, but to the replacement signal. The included incoming information is changed to the ID of the monitoring device 2 (100-2), which is its lower ID, and relayed.

The monitoring device whose ID matches the first information and the incoming information among the monitoring devices 100 that have received the replacement signal continuously relayed in this way changes and stores its lower ID to the third information. (s311) After performing the 11th step of relaying and transmitting the replacement signal (s303, s304), the user's upper ID is set as the incoming information in the setting information including his ID, his upper ID, and his lower ID It is preferable to perform the twelfth step of generating (s312) and transmitting (s313) the included change signal. Therefore, in the case of the monitoring device 2 ( 100 - 2 ), since it is a monitoring device having a higher ID of the replacement device ( 100 - 3 ), the first information and the incoming information included in the received replacement signal are their IDs. to match, the previously stored sub-ID is changed to the third information included in the replacement signal, that is, the ID of the replacement device 100-3, and stored. Then, the incoming information included in the replacement signal is changed to the ID of the replacement device 100-3, which is the refreshed lower ID of the user, and then the replacement signal is relayed. That is, through this process, the upper-level monitoring device of the replacement device automatically detects the newly changed lower-level ID and changes and stores it.

And in step 11, the monitoring device whose ID matches the third information and the incoming information stores its upper ID and lower ID as the first information and the second information, respectively (s321) ) After relaying the replacement signal (s303, s304), a change signal including one's own upper ID as incoming information is generated in the setting information including one's own ID, one's upper ID, and one's lower ID ( It is preferable to perform the twelfth step of sending (s313) s312). That is, the replacement device 100-3, which has received the replacement signal relayed and transmitted by the monitoring device 2 100-2, matches the third information and the incoming information included in the replacement signal with its ID. After storing the first information and the second information as their own upper ID and lower ID, a replacement signal is relayed and transmitted. Then, a change signal containing the changed ID information is re-generated and transmitted. Through this, the replacement device can identify and store its upper ID and lower ID.

Also, in step 11 above. The monitoring device whose ID matches the second information and the incoming information changes and stores its upper ID as the third information (s331) and then relays and transmits the replacement signal (s303, s304), To perform the twelfth step of generating (s312) and transmitting (s313) a change signal including one's own upper ID as incoming information in setting information including one's own ID, one's own upper ID and one's lower ID it is preferable That is, the monitoring device 4 ( 100 - 4 ) that has received the replacement signal transmitted by the replacement device ( 100 - 3 ) matches the second information and the incoming information included in the replacement signal with its ID. After storing the first information and the second information as its own upper ID and lower ID, the replacement signal is relayed and transmitted. Then, a change signal containing the changed ID information is re-generated and transmitted. Through this, the lower-level monitoring device of the replacement device is able to identify the new higher-level ID and store the change.

And, the monitoring device 100, whose ID matches the incoming information of the change signal among the monitoring devices 100 that have received the change signal, changes the incoming information of the change signal to its higher ID and relays the transmission. (s314) to perform the 13th step, the change signal is relayed to the control server 200 and arrives. When the control server 200 receives the change signal after transmitting the replacement signal, the It is preferable to perform the 14th step of changing the monitoring device installation information.

On the other hand, FIG. 9 shows the replacement signal transmitted from the control server 200 or relayed by another monitoring device 100 or the change signal transmitted or relayed from the other monitoring device 100 When receiving, the monitoring It shows a process in which the device 100 operates. Hereinafter, an operation process of the monitoring devices 100 receiving the replacement signal or the change signal will be described with reference to FIG. 9 .

When the monitoring device 100 receives a signal and as a result of identifying the received signal (s201), the signal corresponds to the replacement signal (s230), the first information whose ID is included in the replacement signal (s230) And when the incoming information matches (s231), the monitoring device 100 changes its own sub-ID stored therein to the third information included in the replacement signal and stores it (s2311), In the setting information including ID, own upper ID and own lower ID, a change signal including one's upper ID as incoming information is generated (s2314) and transmitted (s2315), and the incoming call included in the replacement signal is generated (s2314). After changing the information to its ID (s235), it is preferable to relay and transmit the changed replacement signal (s236).

However, when its ID matches the third information and the incoming information included in the replacement signal (s232), the monitoring device 100 transmits the first information and the second information included in the replacement signal to its own ID. After saving as the upper ID and the lower ID (s2312), the change signal including the upper ID as the incoming information in the setting information including the own ID, the upper ID and the lower ID is generated ( It is preferable to transmit (s2314) the replacement signal (s2315), change the incoming information included in the replacement signal to its own ID (s235), and then relay the changed replacement signal (s236).

And, when its ID matches the second information and the incoming information included in the replacement signal (s233), the monitoring device 100 uses its own upper ID stored in the replacement signal, After changing and storing the third information (s2313), a change signal including one's own upper ID as the incoming information is generated in the setting information including one's ID, one's upper ID, and one's lower ID (s2314) It is preferable to transmit (s2315), change the incoming information included in the replacement signal to its own ID (s235), and relay the changed replacement signal (s236).

And, if the received replacement signal does not meet the requirements determined in s231 to s233, but its ID matches the incoming information included in the replacement signal (s234), the incoming information included in the replacement signal is It is preferable to only relay and transmit the changed replacement signal after changing to its ID (s235) (s236). In this case, since the replacement device 100-3 or the replacement device 100-3 is a monitoring device that does not correspond to the upper monitoring device 100-2 or the lower monitoring device 100-4 of the replacement device 100-3, the received replacement signal is It is only for relay transmission. In addition, if the received signal is not the replacement signal but corresponds to a change signal transmitted or relayed by another monitoring device 100, after changing the incoming information of the received change signal to its own higher ID (s241), It is preferable to transmit the relay (s242).

On the other hand, the present invention also provides a method for determining whether a failure of the distribution line monitoring device including the branch distribution line when there is a branch point on the distribution line (10). 10 illustrates a concept in which a signal is also transmitted to the branch distribution line 10-1 through the monitoring devices 100 when there is a branch point in the distribution line 10. As shown in FIG. As shown in FIG. 10 , when there is a branch point in the middle of the distribution line 10 and the monitoring device 100 is also installed in the branch distribution line 10-1, the monitoring device 100 installed just before the branch point is It is desirable to have a plurality of sub-IDs. For example, as shown in FIG. 10 , when there is a branch point after the monitoring device 3 ( 100 - 3 ), there are two lower monitoring devices ( 100 ) of the monitoring device 3 ( 100 - 3 ) ( 100- 3 ). 4 and 100-4a). Therefore, it is preferable that the monitoring device 3 (100-3) installed just before the junction has two IDs, such as the ID of the monitoring device 4 (100-4) and the ID of the monitoring device 4a (100-4a), as its sub-IDs. Do.

And it is preferable that the monitoring device 100 installed just before the junction performs the third step and the fourth step for each of the plurality of sub-IDs. That is, when the monitoring device 3 (100-3) installed just before the junction fails in one of the respective sub-monitoring devices 100-4 and 100-4a and cannot relay and transmit the inspection signal, the monitoring device ( The failure signal for 100-4 or 100-4a) is generated and transmitted according to the third step, and the inspection signal is not relayed because a failure occurs in both of the lower monitoring devices 100-4 and 100-4a. If not, fault signals for all lower monitoring devices 100-4 and 100-4a are generated and transmitted according to the third step. In addition, the monitoring device 3 (100-3) installed just before the junction, when a fault signal is transmitted from one of the respective lower monitoring devices (100-4 and 100-4a), transmits the fault signal to the fourth step. relay transmission according to this, and when fault signals are transmitted from all lower monitoring devices 100-4 and 100-4a, all fault signals are relayed according to the fourth step. In this case, it is possible to check the operating state of each of the monitoring devices 100 for all branch distribution lines 10 - 1 to find the monitoring device 100 in which a failure has occurred.

Although the present invention has been described with the various examples described above, the present invention is not necessarily limited to these examples, and various modifications may be made within the scope without departing from the technical spirit of the present invention. Therefore, the examples disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these examples. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10 distribution line 10-1 branch distribution line
20 Jeonju
30 wires
50 Distribution line monitoring system
100 watchdog
101 containment space 110 current transformer
120 Measuring means 130 Storage means
140 wireless transmission means 150 wireless reception means
160 Power supply means 170 Control means
200 control server
300 line accident detection system

Claims (5)

In order to detect the location of a ground fault, disconnection, or short circuit accident occurring in an overhead distribution line and transmit it to a control server through IoT communication, it includes a monitoring device installed at a certain distance or at a certain span on the distribution line, The distribution line monitoring system operated in conjunction with the accident detection system automatically checks the operating status of each of the monitoring devices to determine the installation location of the monitoring device where a failure has occurred or the performance has deteriorated, and if a failure occurs or performance When the deteriorated monitoring device is replaced, the replaced monitoring device and the replaced monitoring device and adjacent monitoring devices automatically identify the ID of the monitoring device to communicate with and store it newly or change it,
The line accident detection system notifies the distribution line monitoring system of the occurrence of an accident when a ground fault, short circuit accident or disconnection accident occurs on the distribution line by using a relay that detects a ground fault, short circuit or disconnection,
The distribution line monitoring system is, when the line accident detection system detects a ground fault, short circuit accident or disconnection accident on the distribution line and informs the fact that an accident has occurred, finds the point of occurrence of the ground fault, short circuit accident or disconnection accident, ,
The monitoring device includes a current transformer, a measuring means, a storage means, a wireless receiving means, a wireless transmitting means, a power supplying means and a control means, and the Internet of Things received from another monitoring device through the wireless receiving means and the wireless transmitting means. By relaying the signal, the IoT signal transmitted from the control server is relayed to the end monitoring device installed at the end of the distribution line among the monitoring devices, and the IoT signal transmitted from each monitoring device is transmitted to the control server to be relayed until
a first step of generating and transmitting, by the control server, an inspection signal having its own ID as calling information at regular time intervals;
a second step in which, among the monitoring devices that have received the inspection signal, the transmission information of the inspection signal matches its upper ID, changing the transmission information of the received inspection signal to its own ID and relaying the transmission information;
In the second step, the monitoring device that relayed and transmitted the inspection signal does not receive the inspection signal using its sub-ID as outgoing information for a certain period of time, or If the received signal strength is below a certain standard, it is judged that the monitoring device having its own sub-ID as the ID has failed or its performance has deteriorated, and its sub-ID is used as the fault device identification information and its own ID is the outgoing information. a third step of generating and transmitting a signal;
a fourth step in which, among the monitoring devices that have received the fault signal, the transmission information of the fault signal matches its own sub-ID, changing the transmission information of the received fault signal to its ID and relaying it;
When the control server receives the failure signal, it uses the monitoring device installation information stored therein and the failure device identification information to display failure information including the location of the monitoring device where the failure occurred through an output means. Step 5; and
After the control server generates and transmits the inspection signal in the first step, if the failure signal is not received after a predetermined time elapses, all of the monitoring devices installed in the distribution line operate normally. A sixth step of determining that the result is determined and expressing the determination result through the output means;
The upper ID is the ID of the monitoring device installed on the control server side among the monitoring devices adjacent to each of the monitoring devices, the lower ID is the ID of the monitoring device installed on the end monitoring device side among the adjacent monitoring devices, and the start of the distribution line The upper ID of the first monitoring device at the branch is the ID of the control server, and the lower ID of the control server is the ID of the first monitoring device,
The storage means included in each of the monitoring devices stores their IDs, their upper IDs and their own lower IDs, and the monitoring device installation information includes IDs, upper IDs, and lower IDs for each of the monitoring devices. and installation location are included.
The end monitoring device does not have its own sub-ID, does not perform the third step,
Each signal generated by each of the control server or the monitoring device further includes signal identification information capable of distinguishing each signal, and the monitoring device and the control server include the signal identification information included in the received signal. Each signal can be identified using
The failure signal and the failure information further include failure occurrence type information, but when the monitoring device fails to receive an inspection signal whose sub-ID as the originating information is not received after a predetermined time has elapsed after the monitoring device transmits the inspection signal If the failure type information is not relayable, and an inspection signal is received with its own sub-ID as outgoing information, but the received signal strength is less than the predetermined standard, the failure occurrence type information is reduced in performance;

When the control server receives the location and ID of the replacement device after a failure or degraded monitoring device is replaced with a replacement device that is a new monitoring device,
- The control server finds the upper ID and lower ID of the replacement device from the monitoring device installation information and includes them as first information and second information, and uses the ID of the replacement device as third information and its own lower ID a 10th step of generating and transmitting a replacement signal each including as incoming information;
- Among the monitoring devices that have received the replacement signal, the monitoring device whose incoming information of the replacement signal matches its ID changes the incoming information of the received replacement signal to its own lower ID and transmits the relay,
-- The monitoring device whose ID matches the first information and the incoming information changes and stores the third information as its own sub-ID instead of its own sub-ID stored in the storage means and stored in the storage means After that, the replacement signal is relayed and transmitted.
-- After the monitoring device whose ID matches the third information and the incoming information, newly stores the first information and the second information as its upper ID and its lower ID in the storage means relay and transmit the replacement signal,
-- The monitoring device whose ID matches the second information and the incoming information changes and stores the third information as its upper ID instead of its upper ID stored in the storage means 11th step;
- A monitoring device that has newly saved or changed its ID, its upper ID or its lower ID sends its upper ID to the setting information including its own ID, its upper ID and its lower ID a twelfth step of generating and transmitting a change signal included as information;
- A 13th step of relaying, by a monitoring device whose ID matches the incoming information of the changed signal among monitoring devices that have received the change signal, changing the incoming information of the changed signal to its own higher ID; and
- a 14th step of changing the monitoring device installation information according to the setting information when the control server receives the change signal after transmitting the replacement signal; do more,

If there is a branch point in the middle of the distribution line, and the monitoring device is also installed on the branch line,
- The monitoring device installed just before the junction has a plurality of lower IDs,
- The plurality of sub-IDs are IDs for each monitoring device installed immediately after the branch point,
- Each monitoring device installed immediately after the junction has the ID of the monitoring device installed just before the junction as its higher-order ID,
- The monitoring device installed just before the junction,
-- If a failure occurs in one or more of the monitoring devices installed immediately after the junction and thus the inspection signal cannot be relayed, the third step is performed for each of the monitoring devices in which the failure occurred,
-- When a fault signal transmitted or relayed from one or more of the monitoring devices installed immediately after the junction is received, the fourth step is performed to relay and transmit all fault signals, characterized in that the faulty distribution line How to find out the location of the monitoring device and automatically set the replaced monitoring device According to claim 1,
After the control server generates and transmits the inspection signal, it does not receive an inspection signal using the ID of the first monitoring device as outgoing information within a certain period of time, or checks using the ID of the first monitoring device as outgoing information When the received signal strength of the signal is less than the predetermined standard, a seventh step of using the monitoring device installation information to express the failure information including the location of the first monitoring device through an output means; characterized by further comprising: A method of locating a faulty distribution line monitoring device and automatically setting a replaced monitoring device 3. The method of claim 2,
After the monitoring device receives the inspection signal using its second-highest ID as the calling information, the monitoring device fails to receive an inspection signal using its own higher-order ID as the calling information, and then sends a failure signal using its second-highest ID as the calling information. an eighth step of relaying transmission information by changing the transmission information of the inspection signal using the second-highest ID as the calling information to the own ID in the case of receiving; and
When the monitoring device does not receive a failure signal using its lower-level ID as the originating information for a certain period of time after receiving the failure signal with its lower-order ID as the calling information, it sends its own lower-order ID A ninth step of relaying transmission by changing the transmission information of the failure signal as information to its own ID;
The next higher ID is a higher ID of the monitoring device having the higher ID, the next lower ID is a lower ID of the monitoring device having the lower ID, and each of the monitoring devices has its own next higher ID and its next lower ID. is stored, and the monitoring device installation information further includes the next higher ID and the next lower ID for each of the monitoring devices. Positioning of the faulty distribution line monitoring device and automatic setting of the replaced monitoring device Way delete delete

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