JP7523971B2 - Surveillance equipment - Google Patents

Description

An embodiment of the present invention relates to a monitoring device.

Conventionally, temperature-indicating materials are sometimes attached inside panels of high-voltage substation equipment for the purpose of managing heat generation. Heat generation inside the panel is caused, for example, by overcurrent caused by increased load in the main circuit conductors and their connections. The temperature-indicating materials are configured to change color at a specified temperature, allowing managers to recognize heat generation mainly by visually checking the color change.

Japanese Patent Application Publication No. 9-015064

However, it is dangerous to open the panels of high-voltage substation equipment while it is in operation, making it difficult to manage heat generation during operation.

Also, if the temperature rises due to an increase in load, the countermeasure is to reduce the load rate. However, since the cause of a high temperature is not necessarily an increase in load, estimating the level of load based only on temperature monitoring may be inaccurate.

Therefore, the present invention was made in consideration of the above circumstances, and aims to provide a monitoring device that can safely manage and take measures against heat generation and load.

The monitoring device of the embodiment includes a temperature change detection unit, a load status output unit, and a response implementation unit. The temperature change detection unit outputs information capable of detecting that a temperature at a temperature measurement target position in a power supply line that supplies power to one or more load circuits has exceeded a predetermined value. The load status output unit outputs information capable of detecting which of a plurality of stages of different load levels a load on the power supply line corresponds to. The response implementation unit implements a response measure defined in association with the stage according to the output of the temperature change detection unit and the output of the load status output unit.

FIG. 1 is a single-line diagram of a high-voltage substation facility 10 according to the first embodiment. FIG. 2 is a single-line diagram of facilities 21 and 22 connected to the high-voltage substation facility 10. FIG. 3 is a side view of the high-voltage substation equipment 10. As shown in FIG. FIG. 4 is a block diagram showing the configuration of the monitoring device 500. FIG. 5 is a diagram showing an operation flow of the monitoring device 500. FIG. 6 is a side view of the high-voltage substation equipment 10 according to the second embodiment. FIG. 7 is a diagram showing an example of the color change of the temperature indicating material 501. As shown in FIG. FIG. 8 is a diagram showing an operation flow of the monitoring device 500 in the second embodiment.

First Embodiment
Hereinafter, a first embodiment will be described with reference to the accompanying drawings. Fig. 1 is a single-line wiring diagram of a high-voltage substation equipment 10 in this embodiment. Fig. 2 is a single-line wiring diagram of equipment 21, 22 following the high-voltage substation equipment 10. Fig. 3 is a side view of the high-voltage substation equipment 10. Here, the range shown in Fig. 1 is the portion corresponding to Fig. 3, which corresponds to a so-called switchboard. The range shown in Fig. 2 is the portion corresponding to a so-called distribution board, which is a board different from the equipment shown in Fig. 3. The horizontal direction in Fig. 1 corresponds to the depth direction in Fig. 3.

The high-voltage substation equipment 10 shown in FIG. 1 houses the connection portion between the bus bar 101 and the conductors 102, 103, and 104 and the surrounding area in a housing 300 (see FIG. 3). Power is supplied from the conductor 102 to the bus bar 101, and distributed from the bus bar 101 to the conductors 103 and 104. The conductor 102 is provided with a circuit breaker 105. The conductor 103 is provided with a circuit breaker 106 and a current transformer 107. The conductor 103 is connected to an external cable 109 by a connection part 108. Here, a temperature sensor that outputs a value according to temperature is provided near the connection part 108. The external cable 109 is provided with a zero-phase transformer 110.

Similar to conductor 103, conductor 104 is provided with a circuit breaker 116 and a current transformer 117. Conductor 104 is also connected to an external cable 119 by a connection part 118. External cable 119 is provided with a zero-phase transformer 120.

As shown in FIG. 3, the housing 300 houses the above-mentioned components. The housing 300 is composed of a roof 301, an outer wall 302, a partition wall 303, and the like. The partition wall 303 divides the inside of the housing into a first area that is prohibited from being opened during operation, and a second area that can be opened. The components shown in FIG. 1 are housed in the first area. The second area can be opened and closed by a door provided on the outer wall 302, and the control units 304 and 305 control the circuit breakers 106 and 116, etc. The high-voltage substation equipment 10 is equipped with a heater 306 in the first area to prevent condensation.

As shown in FIG. 2, the equipment 21 includes a conductor 201, a connection part 202 that connects the conductor 201 to the external cable 109, a transformer 203, a voltmeter 204, an ammeter 205, and a power meter 206.

The equipment 22 distributes power from the conductor 201 to multiple load circuits, and as shown in FIG. 2, includes circuit breakers 211-214 and terminals 221-224. The circuit breakers 211-214 are provided on a path that supplies power from the conductor 201 to the terminals 221-224. The terminals 221-224 are connected to various load circuits.

Here, the various load circuits have different levels of importance. The level of importance is set according to the impact of a power cut, with the greater the impact being considered to be of high importance. For example, in a factory, the importance of machinery and equipment could be high and the importance of lighting, etc. low. In this embodiment, for the sake of convenience in the following explanation, it is assumed that the load circuit connected to terminal 221 has high importance and the load circuits connected to the other terminals 222 to 224 have low importance.

The importance of each load circuit corresponds to its priority. If the load factor of the high-voltage substation equipment 10 becomes too high, the power supply to a load circuit with a low priority is cut off before the power supply to a load circuit with a high priority. The power supply to a load circuit with a high priority is maintained as much as possible, even if the load factor of the high-voltage substation equipment 10 becomes too high.

Figure 4 is a block diagram showing the configuration of the monitoring device 500 of this embodiment. The monitoring device 500 according to this embodiment is configured to monitor the temperature and load factor status within the high-voltage receiving and transforming equipment 10. The monitoring device 500 includes a temperature change detection unit 511, a load status output unit 521, and response implementation units 531 and 532.

The temperature change detection unit 511 outputs information that can detect that the temperature at the temperature measurement position in the power supply path that supplies power to the load circuit has exceeded a predetermined value. More specifically, when the output value of the temperature sensor near the connection part 108 indicates that it has exceeded a predetermined temperature, the temperature change detection unit 511 outputs information indicating that a change has been detected (corresponding to (1) in Figure 5 described later).

The load status output unit 521 outputs information that can detect which of multiple stages of different degrees of urgency the load status on the power supply line that supplies power to the load circuit falls into. More specifically, when the load status output unit 521 indicates that the load rate calculated using the outputs of the voltmeter 204, ammeter 205, and wattmeter 206 exceeds a predetermined threshold, it outputs information indicating that the load rate is high (corresponding to (2) in Figure 5 described later).

The countermeasures implementation units 531 and 532 implement countermeasures according to the level of urgency, depending on the output of the temperature change detection unit 511 and the load status output unit 521. The countermeasures are determined in correspondence with the above stages. More specifically, the countermeasure implementation unit 531 controls the execution of the cutoff of the power supply by the molded-case circuit breakers 211 to 214 as the countermeasure (corresponding to (4) in FIG. 5, which will be described later). In addition, the countermeasure implementation unit 532 issues information for the administrator as the countermeasure (corresponding to (3) in FIG. 5, which will be described later). The information may be issued, for example, by displaying text or images on a monitor equipped in an information processing terminal device connected to the monitoring device 500, or by issuing audio through a speaker.

With this configuration, the monitoring device 500 performs heat generation management and load rate management. Figure 5 is a diagram showing the operation flow of the monitoring device 500. First, when the temperature change detection unit 511 detects from the output value of the temperature sensor near the connection unit 108 that the temperature at the temperature measurement target position has exceeded a predetermined value, it outputs information (1) indicating that. Furthermore, when the load rate calculated using the outputs of the voltmeter 204, ammeter 205, and wattmeter 206 exceeds a predetermined threshold, the load status output unit 521 outputs information (2) indicating that the load rate is high.

When information (1) and information (2) are ANDed, the response execution unit 532 issues information (3) for the administrator. In addition, the response execution unit 531 cuts off the power supply by the molded-case circuit breakers 211 to 214, i.e., trips (4).

When various load circuits are associated with high and low levels of importance as shown in FIG. 2, the response execution unit 531, based on the priority order corresponding to the importance, targets the power supply to a load circuit with low importance and low priority to be cut off before the power supply to a load circuit with high importance and high priority. In this way, the response execution unit 531 maintains the power supply to the load circuit with high importance and high priority.

Here, we will show concrete numerical examples of how to handle load circuits according to their importance. For example, if the load rate exceeds 80%, the power supply to some of the less important load circuits is cut off. There are several possible methods for selecting which load circuit to trip at this time, such as selecting the least important one with the highest load, or selecting the one with the lowest importance. If the load rate exceeds 90%, the circuit breakers 212 to 214 are activated to cut off the power supply to all of the terminals 222 to 224 to which the less important load circuits are connected. If the load rate exceeds 95%, all circuit breakers 211 to 214 are activated to cut off the power supply to all of the load circuits.

Returning to the explanation of FIG. 5, next, when the temperature change detection unit 511 detects that the temperature at the temperature measurement location has exceeded a predetermined value and outputs information (5) indicating that, and the load status output unit 521 outputs information (6) indicating that the load rate is low, the response execution unit 532 issues information (7) for the administrator. This information (7) is information for informing the administrator of an abnormality (heat generation, etc.) within the panel. In this case, since the load rate is not high, it is considered that the heat is being generated due to a cause other than the load rate. For this reason, in this case, the implementation of tripping (4) of the molded-case circuit breakers 211-214 is left to the administrator, and is not implemented automatically and immediately.

As described above, according to this embodiment, it is possible to monitor the temperature and load status inside the panel without opening the high-voltage substation equipment 10, and to issue trips or abnormality alerts depending on the level of urgency. Therefore, according to this embodiment, heat generation and load management and countermeasures can be implemented safely.

In addition, according to this embodiment, when the load factor is high, the power supply to the load circuit of high importance is maintained by tripping the load circuit of low importance first, so that the impact of tripping can be kept low.

In addition, according to this embodiment, even if the load factor is low, if heat is generated, information (7) indicating an abnormality is issued, so heat generated due to causes other than overload can also be identified and dealt with.

Second Embodiment
Next, a second embodiment will be described with reference to Figures 6 to 8. Since the second embodiment is a modified example of the first embodiment, the same parts as those described in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

Figure 6 is a side view of the high-voltage substation equipment 10 in the second embodiment. The monitoring device 500 of this embodiment uses a temperature indicator 501 and a camera 502 instead of a temperature sensor. Figure 7 is a diagram showing an example of the color change of the temperature indicator 501. The temperature indicator 501 includes, for example, three temperature indicator elements 503-505. Each of the temperature indicator elements 503-505 changes color in response to a different temperature. This color change makes it possible to determine the temperature at the position where the temperature indicator 501 is attached.

8 is a diagram showing an operation flow of the monitoring device 500 in the second embodiment. The monitoring device 500 in this embodiment includes a temperature change detection unit 551, a load status output unit 521, response implementation units 531 and 532, and a moving object detection unit 552. The load status output unit 521 and the response implementation units 531 and 532 are similar to those in the first embodiment.
The temperature change detection unit 551 detects a temperature change by monitoring, with a camera 502, a color change of a temperature indicating material 501 attached to the temperature measurement target position (near the connection portion 108).
The moving object detection unit 552 detects the presence of a moving object (such as a small animal) within the monitoring area using the image output by the camera 502 .
In this embodiment, when the output of the temperature change detection unit 551 indicates that the temperature at the temperature measurement target position is below a predetermined value and the output of the load status output unit 521 indicates that the level of urgency is low, the response execution unit 532 issues information to the manager notifying the manager of the occurrence of an abnormality as a response measure. In other words, when the load rate is not high (6) and the camera 502 captures a moving object such as a small animal (8), the response execution unit 532 issues a report of the occurrence of an abnormality (7).

In this way, according to this embodiment, in addition to the same effects as the first embodiment, by using the camera 502, it is possible to detect and issue an alarm when an abnormality occurs, such as a small animal or other moving object entering the board.

Note that each unit (temperature change detection unit 511, 551, load status output unit 521, response implementation unit 531, 532, and moving object detection unit 552) of the monitoring device 500 of the first and second embodiments may be a functional module realized by cooperation between computer hardware and software, or may be dedicated hardware (circuitry).

When each of the above-mentioned units is a functional module, the monitoring device 500 is configured as a computer equipped with hardware such as a processor, memory, and a communication interface. The program may be provided by being recorded in an installable or executable file format on a computer-readable recording medium such as a CD-ROM, a flexible disk (FD), a CD-R, or a DVD (Digital Versatile Disk).

The program may also be configured to be stored on a computer connected to a network such as the Internet and provided by downloading it via the network. The program may also be configured to be provided or distributed via a network such as the Internet. The program may also be configured to be provided by being pre-installed in a ROM or the like.

Although an embodiment of the present invention has been described, this embodiment is presented as an example and is not intended to limit the scope of the invention. This new embodiment can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. Furthermore, this embodiment and its modifications are included within the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims.

10... High voltage substation equipment 101... Busbar, 102-104... Conductor (power supply line)
105, 106, 116... Circuit breakers 107, 117... Current transformers 108, 118... Connections 109, 119... External cables 110, 120... Zero-phase transformer 201... Conductor (power supply line)
202...Connection section, 203...Transformer 204...Voltmeter, 205...Ammeter, 206...Power meter 21...Equipment, 211-214...Circuit breaker 22...Equipment, 221-224...Terminal 300...Housing, 301...Roof, 302...Exterior wall, 303...Partition wall 304...Control section, 306...Heater 500...Monitoring device 501...Temperature indicator, 502...Camera, 503-505...Temperature indicator element 511...Temperature change detection section, 521...Load status output section, 531, 532...Response implementation section 551...Temperature change detection section, 552...Motion detection section

Claims (6)

a temperature change detection unit that outputs information capable of detecting that a temperature at a temperature measurement target position in a power supply path that supplies power to one or more load circuits has exceeded a predetermined value;
a load status output unit that outputs information that can detect which of a plurality of stages of different load levels the load on the power supply line corresponds to;
a countermeasure execution unit that executes a countermeasure determined in correspondence with the stage in response to an output from the temperature change detection unit and an output from the load status output unit;
A monitoring device comprising: The monitoring device of claim 1 , wherein the response implementation unit implements one or more of the response measures determined in correspondence with the stage from a plurality of response measures including cutting off the power supply to the load circuit and issuing information for an administrator. the power supply path supplies power to the plurality of load circuits in a priority order;
The monitoring device according to claim 2 , wherein the countermeasure execution unit takes as the countermeasure a cutoff of power supply to the load circuit other than the load circuit having the highest priority. A monitoring device as described in any one of claims 1 to 3, wherein the response implementation unit, when the output of the temperature change detection unit indicates that the temperature at the temperature measurement location exceeds a predetermined value and the output of the load status output unit indicates that the load is at a high stage, implements the response measure of cutting off the power supply to the load circuit and issuing information for an administrator. A monitoring device as described in any one of claims 1 to 4, wherein the response implementation unit issues information to an administrator to notify them of an abnormality as the response measure when the output of the temperature change detection unit indicates that the temperature at the temperature measurement location exceeds a predetermined value and the output of the load status output unit indicates that the load is at a low stage. A moving object detection unit is further provided for detecting the presence of a moving object within the monitoring area,
The monitoring device of any one of claims 1 to 5, wherein the response implementation unit, when the output of the temperature change detection unit indicates that the temperature at the temperature measurement location is below a predetermined value and the output of the load status output unit indicates that the load is at a low stage, and further, when the moving object detection unit detects the presence of a moving object, issues information to an administrator to notify them of an abnormality as the response measure.

Images