JP7230510B2 - proximity monitoring system - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an approach monitoring system for monitoring whether or not a person approaches a facility or the like to which electricity is connected.

A substation, for example, is a place where electrical equipment with electricity is installed. As for substations, there are cases where workers enter and work inside the substations for facility maintenance. For this reason, substations have safe and unsafe areas for working. In other words, a live part where electricity is connected by equipment such as a transformer is a no-go area. Workers approaching such restricted areas should be warned.

For this purpose, there is the following monitoring device (see, for example, Patent Document 1). This monitoring device installs a large number of special receivers equipped with antennas for receiving radio waves from transmitters carried by workers at necessary locations in facilities with restricted areas where charging parts of equipment are located. In the central control room, the position of the worker is determined based on the signals received by each receiver. When it determines that you have entered a restricted area, it will automatically issue a warning.

These transmitter-receiver monitoring devices prevent workers from entering restricted areas.

JP-A-64-17196

However, the monitoring device described above has the following problems. This conventional monitoring device must be provided and installed on site with a special receiver equipped with an antenna. In other words, the conventional monitoring device requires a special receiver and installation work for this receiver.

Also, for example, when the charging section is complicated, it is necessary to finely set the no-entry area. For this reason, in conventional surveillance equipment, a large number of receivers equipped with antennas with narrow directivities must be placed in the field. In other words, it is necessary to prepare a large number of receivers equipped with antennas and install these receivers at various locations. For this reason, a lot of labor is required to install and collect the receivers.

An object of the present invention is to solve the above-mentioned problems, eliminate the need to install a large number of special devices, and provide an approach monitoring system that makes it possible to monitor whether equipment in a charged state is approached at a power generation substation. to provide.

In order to solve the above problems, the invention of claim 1 provides a portable device and a first processing device used in a power generation and substation, and a second processing device installed in a control station of the power generation and substation. wherein the portable device is carried by at least one subject who enters the power plant and substation to detect a three-dimensional position including height, and the first processing device comprises a target person position extracted from the target person position representing the three-dimensional position of the target person received from the portable device, and transmitting the target person position to the second processing device; It is each facility installed in a place, and the facility represented by the three-dimensional position including the height is stored in advance, and when the subject position is received from the first processing device, the facility in the charged state determining whether or not the target person position is approaching, transmitting an alarm signal representing an alarm based on the determination result to the first processing device, and receiving the alarm signal by the first processing device; and outputting an alarm from the corresponding portable device.

In the first aspect of the invention, the portable device is carried by at least one subject who enters the power generation and substation and detects a three-dimensional position including height. The first processing device extracts from the target person positions representing the three-dimensional positions of the target person received from the portable device, and transmits the extracted target person positions to the second processing device. The second processing device stores in advance each piece of equipment installed in the power generation and substation represented by a three-dimensional position including height. When receiving the target person position from the first processing device, the second processing device determines whether or not the target person position is approaching the equipment in the charged state, and outputs an alarm signal representing an alarm based on the determination result. Send to the first processor. The first processor outputs an alert from the corresponding portable device upon receiving the alert signal.

The invention of claim 2 is the approach monitoring system of claim 1, wherein the second processing device, when receiving the target person position from the first processing device, charges the facility in a charged state. When it is determined that the target person position is approaching the part, an alarm signal indicating that it is a charging area for equipment is transmitted to the first processing device, and the first processing device receives the alarm signal is received, the portable device corresponding to the warning signal outputs an alarm indicating that the charging area is present.

The invention of claim 3 is the proximity monitoring system according to claim 1 or 2, wherein the second processing device receives the subject position from the first processing device, and charges the substation. When it is determined that the target person position is close to the electric wire in the state, an alarm signal indicating that the electric wire is in a hot-line area is transmitted to the first processing device, and the first processing unit The processing device is characterized in that, when receiving the alarm signal, the portable device corresponding to the alarm signal outputs an alarm indicating that the mobile device is in a hot-line area.

The invention of claim 4 is the approach monitoring system according to any one of claims 1 to 3, wherein when the second processing device receives the subject position from the first processing device, When it is determined that the target person position is approaching the facility in a power outage state, an alarm signal indicating a power outage area is transmitted to the first processing device, and the first processing device comprises: It is characterized in that, when the alarm signal is received, the portable device corresponding to the alarm signal outputs an alarm indicating a power outage area.

According to the first aspect of the invention, when the target person carries the portable device, the portable device warns the user when the portable device approaches the facility of the power plant and substation represented by the three-dimensional position including the height. is output. This allows the subject to know exactly if he or she is approaching equipment that is in a charged state. Moreover, it is not necessary to install a special device in each facility of the substation as in the conventional case.

According to the invention of claim 2, when the portable device approaches the charging area of the charging section of the power station and substation, an alarm is output. be possible.

According to the third aspect of the present invention, when the portable device approaches the hot line area of the power plant and substation, an alarm is output. becomes possible to know

According to the fourth aspect of the present invention, when the mobile device approaches the blackout area of the power station and substation, an alarm is output, so that the target person can know that the equipment is approaching the blackout area. Become.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the structure of the approach monitoring system by one embodiment of this invention. It is a figure which shows an example of an alarm display terminal. It is a figure which shows an example of equipment position data. It is a figure which shows an example of equipment state data. It is a figure which shows the mode of calculation of charging part / worker distance.

Next, an embodiment of the invention will be described in detail with reference to the drawings.

A proximity monitoring system according to this embodiment is shown in FIG. This approach monitoring system includes a monitoring control device 11 and an ITV (Industrial TeleVision) terminal device 13 at a control station. The approach monitoring system also includes a collection device 21, a position confirmation device 22, and a plurality of alarm display terminals 25 ₁ to 25 _n used in the substation.

A substation typically comprises a facility controller 23, a plurality of facilities 24 ₁ -24 _m , a camera controller 26 and a plurality of ITV cameras 27 ₁ -27 _p .

The facilities 24 ₁ to 24 _m of the substation are CB (Circuit Breaker), LS (Line Switch) switches, electric wires such as busbars and lines in the substation, and the like. The CB and LS of the facilities 24 ₁ to 24 _m are switched on and off under the control of the facility control device 23, and an on/off state signal representing the on/off state is sent to the facility control device 23, respectively.

The facility control device 23 controls turning on/off of CB and LS in the facilities 24 ₁ to 24 _m . For this purpose, the equipment control device 23 receives an on/off signal indicating whether the CB or LS is on or off from the supervisory control device 11 of the control station via the communication network NW. When the facility control device 23 receives the on/off signal from the monitoring control device 11, it switches on/off the CB and LS based on the on/off signal. After that, when the facility control device 23 receives the on/off state signal from the CB or LS, it sends the on/off state signal to the monitoring control device 11 of the control station via the communication network NW.

ITV cameras 27 ₁ to 27 _p are installed at each location of the substation. The ITV cameras 27 ₁ to 27 _p are remote controlled cameras that operate under control from the substation. In other words, the ITV cameras 23a and 23b are instructed from the control station via the camera control device 26 to change the shooting direction and the like. The ITV cameras 23a and 23b send to the camera control device 26 an image signal representing the inside of the substation.

The camera control device 26 controls the ITV cameras 27 ₁ to 27 _p according to instructions from the substation. In other words, the camera control device 26 changes the photographing directions of the ITV cameras 27 ₁ to 27 _p according to instructions from the substation. Further, when the camera control device 26 receives image signals from the ITV cameras 27 ₁ to 27 _p , it transmits these image signals to the control center via the communication network NW.

The alarm display terminals 25 ₁ to 25 _n are carried and used by workers who are intended to enter the substation, for example, when they perform work inside the substation. As an example, the alarm display terminal ₂₅₁ includes a DGPS (Differential Global Positioning System) receiver 25a and a display device 25b, as shown in FIG.

Worker identification data for identifying a worker can be previously input to the alarm display terminal ₂₅₁ . The alarm display terminal ₂₅₁ stores the input worker identification data.

The DGPS receiver 25a corrects errors in the position received by GPS to improve the accuracy of position detection. When the DGPS receiver 25a receives a DGPS signal from a satellite, the DGPS receiver 25a obtains worker position data representing the received position in three dimensions including height based on this signal. A GPS receiver with an altimeter may be used instead of the DGPS receiver 25a. In this case, an altitude signal representing the height (altitude) at this position obtained by the altimeter is added to the GPS signal representing the position obtained by the GPS receiver to generate worker position data. . The worker position data generated by the DGPS receiver 25a is, for example, when the worker carries the alarm display terminal ₂₅₁ ,
X ₁ , Y ₁ , Z ₁
It is represented by three-dimensional coordinates such as In this case, the values X ₁ , Y ₁ represent the worker's position on the ground, and the value Z ₁ represents the height at which the worker is now.

Thereafter, the DGPS receiver 25a adds, to the generated worker position data, worker identification data, which is data for identifying a worker and is input and stored in advance. Then, the DGPS receiver 25a transmits the worker position data to which the worker identification data is added to the position confirmation device 22, for example, by radio.

The display device 25b is activated by an alarm signal from the supervisory control device 11 at the control station. For this purpose, the display device 25b includes a control section 25b- ₁ and a display section 25b- ₂ .

The display unit 25b ₂ displays to the worker which area the worker is currently in, and includes light emitters 25b ₁₁ to 25b ₁₃ . The light emitter _25b11 is like an LED (Light Emitting Diode) indicating a "charging area", and the light emitter _25b12 is like an LED indicating a "live line/near area". The light emitter _25b13 is like an LED that indicates a "blackout area".

In this embodiment, the areas (zones) in which workers work are set as follows. A "charging area" is a predetermined area in which there is exposed metal or a live portion of equipment such as an LS or CB that is live and in a charged state. The active line area of the "live line/near live line area" is a predetermined range centered on the bus lines and tracks that are in a charged state. It is a predetermined range for surrounding work and is a wide range compared to the live line area. A "blackout area" is a predetermined range in which there are exposed metal parts of LS, CB, busbars/tracks, etc. in a blackout state with no electricity. In this way, the "charging area", "live line/near live line area", and "blackout area" represent different predetermined ranges.

The light-emitting body 25b- ₁₁ emits light under the control of the control section 25b- ₁ to indicate to the worker that it is in the "charging area", and the light-emitting body 25b- ₁₂ emits light under the control of the control section 25b- ₁ . to indicate to the worker that it is in the "live line/close area". The light emitter 25b- ₁₃ emits light under the control of the control unit 25b- ₁ to indicate to the worker that it is in the "blackout area".

As the light emitters 25b ₁₁ to 25b ₁₃ emit light, the control unit 25b ₁ may output alarm sounds with different tones for a predetermined period of time. As a result, the control unit _25b1 notifies the worker of the alarm by sound.

The control section 25b- ₁ controls the display section 25b _-2 . That is, the controller _25b1 receives the alarm signal from the position confirmation device 22. FIG. When the alarm signal indicates a charging area, the control unit _25b1 controls the display unit _25b2 to emit light from the light emitter _25b11 , and when the alarm signal indicates a hot line/near area, it controls the display unit _25b2 . light emitter _25b12 . Further, when the alarm signal indicates a power outage area, the control unit _25b1 controls the display unit _25b2 to cause the light emitter _25b13 to emit light.

The configuration of the alarm display terminal ₂₅₁ is as described above. Since other alarm display terminals are the same as the alarm display terminal ₂₅₁ , description thereof will be omitted. In this way, the alarm display terminals 25 ₁ to 25 _n check the current position in three dimensions and send the worker position data to the position confirmation device 22, and also receive an alarm signal from the position confirmation device 22. Light the luminary.

The locating device 22 is used when work is done in the substation. When the position confirmation device 22 receives the worker position data from the alarm display terminals 25 ₁ to 25 _n , it stores the worker position data. At the same time, the position confirmation device 22 displays the current position of the worker on a display device (not shown) based on the worker position data received from the alarm display terminals 25 ₁ to 25 _n . After the collection device 21 extracts the worker position data, the position confirmation device 22 receives an alarm signal from the collection device 21, refers to the worker identification data added to the alarm signal, and displays the alarm display terminals 25 ₁ to 25 1 to This alarm signal is sent to the alarm display terminal corresponding to the operator identification data in 25 _n . At this time, the position confirmation device 22 displays on the display device which worker's alarm display terminal received the alarm based on the received alarm signal.

Such a position confirmation device 22 may be incorporated in, for example, a mobile terminal together with a collection device 21, which will be described later, and carried by a surveillance officer.

The collection device 21 is used when work is done in the substation. The collection device 21 monitors worker position data stored by the position confirmation device 22 . Then, when the worker position data changes, that is, when the worker position represented by the worker position data changes, the collecting device 21 extracts the changed worker position data. After that, the collecting device 21 transmits the extracted worker position data to the monitoring control device 11 of the control center via the communication network NW. Note that the collection device 21 may periodically extract worker position data from the position confirmation device 22 and transmit it to the monitoring control device 11 . Such a collection device 21 extracts and transmits worker position data using monitoring software, for example.

Also, after transmitting the worker position data, the collecting device 21 , upon receiving an alarm signal from the monitoring control device 11 at the control station, sends this alarm signal to the position confirmation device 22 .

The above is the configuration of the collection device 21, the position confirmation device 22, the alarm display terminals 25 ₁ to 25 _n , etc. used in the substation. Next, the monitor control device 11 and the ITV terminal device 12 installed in the control station will be described.

The ITV terminal device 12 controls the ITV cameras 27 ₁ to 27 _p installed at the substation based on the instructions of the person in charge. For example, the ITV terminal device 12 shifts the photographing directions of the ITV cameras 27 ₁ to 27 _p to photograph the interior of the substation. When the ITV terminal device 12 receives the image signals from the ITV cameras 27 ₁ to 27 _p , it displays the inside of the substation on a display device (not shown) based on the image signals.

The supervisory control device 11 monitors and controls the substation. For example, the supervisory control device 11 generates on/off signals for instructing on/off of the CB and LS in the facilities 24 ₁ to 24 _m . Then, the monitoring control device 11 transmits an ON/OFF signal to the equipment control device 23 of the substation via the communication network NW.

In addition, the monitor control device 11 displays a system diagram of the substation on the display device. At this time, based on the on/off state signal received from the equipment control device 23 of the substation, the monitoring control device 11 activates the bus line/line (electric wire in the substation) according to the on/off state of the CB and LS of the substation. Determine if it is a line. When the bus/line is live, the supervisory control device 11 puts a mark, for example, on the relevant portion of the system diagram to indicate that the bus/line is live. The supervisory control device 11 generates a mark signal indicating that the bus/line is live with a mark.

The monitoring control device 11 has a processing function 11a therein. Processing function 11a determines which area the substation workers are in. For this reason, the processing function 11a stores in advance facility position data representing the position of each facility. An example of this facility position data is shown in FIG. This facility position data represents the positions of the facilities 24 ₁ to 24 _m of the substation. 1 equipment is a circuit breaker, the processing function 11a determines the positions of the terminals A1, A2, etc. of this circuit breaker,
X _A1 , Y _A1 , Z _A1
X _A2 , Y _A2 , Z _A2
It is represented by three-dimensional coordinates such as In this case the values X ₁ , Y ₁ represent the position of the installation on the plane and the value Z ₁ represents the current height of the installation. Also No. If the N facility is a busbar, the processing function 11a determines each representative B1 position, B2 position, etc. of this busbar,
X _B1 , Y _B1 , Z _B1
X _B2 , Y _B2 , Z _B2
It is represented by three-dimensional coordinates such as The same applies when the facility is a railroad track. In this way, when the facility is a busbar/line, the processing function 11a represents each representative position of the busbar/line by coordinates. Each of these positions becomes a live portion of the busbar/line.

The facility location data of these facilities 24 ₁ to 24 _m can be obtained in advance using a GPS receiver at the substation.

As previously mentioned, processing function 11a determines which area the substation workers are in. For this reason, the processing function 11a stores in advance the facility status data in addition to the facility position data. An example of this equipment state data is shown in FIG. This facility status data represents the charge/failure status of facilities 24 ₁ to 24 _m of the substation. In FIG. 4, for example, No. 1 is a circuit breaker, and indicates that this circuit breaker is in a charging state; The facility of N is a bus line, and this bus line is in a power failure state.

Such equipment state data is created by referring to, for example, an ON/OFF state signal received by the monitoring control device 11 from the equipment control device 23, a mark signal generated by the monitoring control device 11, or the like.

In a state where the processing function 11a stores these facility position data and facility status data, when the supervisory control device 11 receives the worker position data from the collection device 21 of the substation, it determines in which area the worker is. is determined from the worker position data.

That is, when the monitoring control device 11 receives the worker position data, the processing function 11a checks the position of the worker from the worker position data. Next, the processing function 11a refers to the facility position data and the facility state data to check the charging section of the facility being charged, and further checks the location of the charging section. Then, the processing function 11a determines whether to issue an alarm based on whether the distance between the three-dimensional position of the worker represented by the worker position data and the three-dimensional position of the charging section of the equipment satisfies a predetermined determination condition. . For example, as shown in FIG. When the circuit breaker 101, which is one piece of equipment, is in a charged state, the processing function 11a refers to the equipment position data to determine the positions X _A1 , Y _A1 , Z _A1
and the position of the alarm display terminal 25 ₁ carried by the worker, that is, the position of the worker X ₁ , Y ₁ , Z ₁
, the charging unit/worker distance, which is the distance L1 from the charging unit to the worker, is calculated.

Next, the processing function 11a uses the following determination formula:
Charging part/worker distance + approaching distance ≤ approaching safety distance Approaching distance: Distance set according to the charging area, hot line/hot and near area Safe approaching distance: If the relationship of the distance that can ensure safety even when approaching is established , processing function 11a determines that the worker has entered the charging area. Processing function 11a then generates a warning signal indicating that a worker has entered the charging area. After that, the processing function 11a extracts the worker identification data added to the worker position data, adds the worker identification data to the generated alarm signal, and collects data from the substation via the communication network NW. Send to device 21 .

Further, the processing function 11a determines that when the equipment being charged is a busbar/railway and the distance from the nearest position to the worker at each position of the busbar/railway also satisfies the above determination formula, the worker Generates an alarm signal indicating entry into a live/near area. Thereafter, in the same way, the processing function 11a extracts the worker identification data added to the worker position data, adds the worker identification data to the generated alarm signal, and connects the communication network NW. Then, it is transmitted to the collection device 21 in the substation.

Furthermore, if the determination formula holds, but the equipment is out of power, it is determined that the worker has entered the power outage area. At this time, processing function 11a generates an alarm signal indicating that the worker has entered the blackout area. Thereafter, in the same way, the processing function 11a extracts the worker identification data added to the worker position data, adds the worker identification data to the generated alarm signal, and connects the communication network NW. Then, it is transmitted to the collection device 21 in the substation.

The above is the configuration of the approach monitoring system according to this embodiment. Next, the operation of this approach monitoring system will be described. When a supervisor and a plurality of workers work at a substation, each worker wears an alarm display terminal on his helmet, shoes, arm, or the like. In addition, the observer carries a portable terminal in which the collection device 21 and the position confirmation device 22 are incorporated.

The alarm display terminals 25 ₁ to 25 _n of each worker send the worker position data representing the position including the height of the worker to the position confirmation device 22 . When the position confirmation device 22 receives the worker position data from the alarm display terminals 25 ₁ to 25 _n , it stores the worker position data. The collection device 21 monitors worker position data stored by the position confirmation device 22 . At this time, the position confirmation device 22 displays the current position of the worker based on the worker position data received from the alarm display terminals 25 ₁ to 25 _n .

When a change occurs in the worker position data, the collection device 21 extracts the changed worker position data. After that, the collecting device 21 transmits the extracted worker position data to the monitoring control device 11 of the control center via the communication network NW.

The supervisory control device 11 of the control station receives the worker position data via the communication network NW. When the supervisory control device 11 receives the worker position data, the processing function 11a of the supervisory control device 11 uses the facility position data and the facility state data, and based on the worker position data, the substation worker determines the charging area, Determine which area you are in: a hot line/close area or a blackout area. Then, the processing function 11a generates an alarm signal based on the judgment result, and transmits this alarm signal to the collection device 21 of the substation via the communication network NW.

In addition, when an alarm signal is generated at the control station, the person in charge at the control station operates the ITV terminal device 12 based on the position of the worker represented by the worker position data, and visualizes the situation of the site with an image. can be confirmed.

When the collection device 21 of the substation receives an alarm signal from the supervisory control device 11 of the control station after transmitting the worker position data, it sends this alarm signal to the position confirmation device 22 . When the position confirmation device 22 receives the alarm signal from the collection device 21, it refers to the worker identification data added to the alarm signal, and selects an alarm corresponding to the worker identification data among the alarm display terminals 25 ₁ to 25 _n . This alarm signal is sent to a display terminal, for example alarm display terminal ₂₅₁ . At this time, the position confirmation device 22 displays which worker's alarm display terminal received the alarm based on the received alarm signal.

When receiving the alarm signal, the alarm display terminal ₂₅₁ emits light from the light emitter _25b11 if the alarm signal indicates a charging area, and emits light from the light emitter _25b12 if the alarm signal indicates a live line/near live area. luminous. Also, when the alarm signal indicates a power outage area, the alarm display terminal _25-1 light emitter 25b- ₁₃ emits light to inform the worker that an alarm has been issued.

In this way, according to this embodiment, only by carrying the alarm display terminals 25 ₁ to 25 _n by the worker, the alarm display terminals 25 can be displayed based on the positions of the alarm display terminals 25 ₁ to 25 _n represented in three dimensions. ₁ to 25 _n indicate the current area so that each worker can know exactly where they are.

In addition, according to this embodiment, when the observer carries the collection device 21 and the position confirmation device 22, the position confirmation device 22 displays the area of the current alarm display terminal and the alarm display terminal where the alarm is issued. Therefore, the monitor can know exactly where each worker's area is and which worker is being alerted.

Furthermore, according to this embodiment, the current area can be displayed according to the situation at the site simply by carrying the alarm display terminals 25 ₁ to 25 _n with the workers. Installation of a large number of special receivers and the like can be made unnecessary.

11 supervisory control device 11a processing function (second processing device)
12 ITV terminal device 21 collection device (first processing device)
22 position confirmation device (first processing device)
23 Equipment control device 24 ₁ to 24 _m Equipment 25 ₁ to 25 _n Alarm display terminal (portable device)
25a DGPS receiver 25b display device 25b ₁ control section 25b ₂ display section 26 camera control device 27 ₁ to 27 _p ITV camera

Claims (4)

A proximity monitoring system comprising a portable device and a first processing device used in a power generation and substation, and a second processing device installed in a control station of the power generation and substation,
The portable device detects a three-dimensional position, including height, carried by at least one subject who enters the power generation and substation;
The first processing device transmits to the second processing device a target person position extracted from target person positions representing a three-dimensional position of the target person received from the portable device;
The second processing device is each facility installed in the power substation, stores in advance the facility represented by a three-dimensional position including height, and from the first processing device to the subject Upon receiving the position, determining whether the target person position is approaching the charged equipment, and based on the determination result, transmitting an alarm signal representing an alarm to the first processing device;
When the first processing unit receives the alarm signal, it outputs an alarm from the corresponding portable device.
An approach monitoring system characterized by: When the second processing device receives the subject position from the first processing device and determines that the subject position is approaching a charging section of the facility in a charged state, the second processing device determines that the facility sending an alarm signal to the first processing device indicating that it is a charging area of
When the first processing device receives the warning signal, the first processing device outputs a warning indicating a charging area from the portable device corresponding to the warning signal.
The approach monitoring system according to claim 1, characterized in that: When the second processing device receives the target person position from the first processing device and determines that the target person position is approaching an electric wire in a charged state of the substation, Sending an alarm signal indicating that the electric wire is in a hot and near area to the first processing device;
When the first processing device receives the warning signal, the first processing device outputs a warning indicating that the portable device corresponding to the warning signal is in a hot-line area.
3. The proximity monitoring system according to claim 1 or 2, characterized in that: When the second processing device receives the target person position from the first processing device and determines that the target person position is approaching the facility in a power failure state, in a power failure area sending an alarm signal to the first processing unit indicating that
When the first processing device receives the warning signal, the first processing device outputs a warning indicating a power outage area from the portable device corresponding to the warning signal.
The approach monitoring system according to any one of claims 1 to 3, characterized in that:

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