JP7169479B1 - interface box - Google Patents

Abstract

An interface box for transmitting output values of a plurality of sensors connected to a cubicle as digital signals is easily installed even when the installation space for a unit in the cubicle is limited.
An interface box acquires a load current and a load voltage on a low voltage side of a transformer provided in power receiving and transforming equipment, and outputs load information generated based on the acquired load current and the load voltage. A main that acquires information detected by a transformer unit and an environment sensor that detects the surrounding conditions of the power receiving and transforming equipment, generates environmental information based on the acquired information, and acquires the load information from the transformer unit. and a unit.
[Selection drawing] Fig. 2

Description

The present invention relates to interface boxes.

Conventionally, in electrical equipment such as cubicle-type high-voltage power receiving equipment installed in high-voltage consumers who receive power supply of 6600 [V] from high-voltage distribution lines and convert it to 100 [V] or 200 [V] for use, There is known a technique for detecting whether or not an abnormality has occurred in the cubicle by providing various sensors in the cubicle and collecting and analyzing output information from the sensors (for example, see Patent Document 1). reference).

JP 2020-009184 A

According to the technique described above, the output values from the sensors installed in the cubicle are transmitted to a remote server or the like. In general, in order to transmit the sensor output value as a digital signal, it is necessary to construct a unit equipped with an A/D converter and a communication unit that correspond to multiple sensors, and the larger the number of sensors, the larger the unit becomes. . Also, when it is necessary to measure load current and load voltage, it is necessary to provide transducers corresponding to the number of measurement channels, and the larger the number of measurement channels, the larger the unit. In other words, when the installation space for the unit in the cubicle is limited, there is a problem that it is difficult to fit the unit in the cubicle.

Accordingly, the present invention provides an interface box for transmitting the output values of a plurality of sensors connected to a cubicle as digital signals, which can be easily installed even when the installation space for the units in the cubicle is limited. provide an interface box that can

Aspect 1 of the present invention acquires the load current and load voltage on the low voltage side of a transformer provided in a power receiving and transforming facility, and outputs load information generated based on the acquired load current and load voltage. A main unit that acquires information detected by a unit and an environment sensor that detects the surrounding conditions of the power receiving and transforming equipment, generates environmental information based on the acquired information, and acquires the load information from the transformer unit. wherein the transformer unit comprises: a plurality of transducers for converting the load voltage into current information; a first AD converter for converting information from the plurality of transducers into digital information; and a load current into digital information. and outputs digital information converted by the first AD converter and the second AD converter as the load information to the main unit, and the main unit receives information from the plurality of environment sensors. The interface box is provided with a third AD converter that acquires and converts into digital information to generate environment information, and outputs the environment information and the load information together to the outside .

Further, according to aspect 2 of the present invention, in the interface box according to aspect 1, a housing in which the main unit is stored and a housing in which the transformer unit is stored are different housings, and the main unit and the The transformer units are connected by a connection cable including at least a signal line for transmitting the load information.

A fifth aspect of the present invention is the interface box according to any one of aspects 1 to 4, wherein the transformer unit converts digital information converted by the first AD converter and digital information converted by the second AD converter. is output to the main unit as the load information.

Moreover, according to aspect 6 of the present invention, the interface box according to any one of aspects 1 to 5 further includes a sensor conversion unit that converts an output value of the environment sensor into a current value and outputs the current value to the main unit.

A seventh aspect of the present invention is the interface box according to any one of the first to sixth aspects, wherein the main unit generates the environment information at the same time as the load information. The information and the load information are put together, and a telegram to which the put together time is given is output to the outside.

An eighth aspect of the present invention is the interface box according to any one of the first to seventh aspects, further comprising a communication unit for outputting the environment information and the load information acquired by the main unit to a predetermined network. .

A ninth aspect of the present invention is the interface box according to the eighth aspect, wherein the main unit further includes a battery capable of supplying power in the event of a power failure, and the main unit and the communication unit store power in the battery in the event of a power failure. power is supplied.

Further, according to a tenth aspect of the present invention, in the interface box according to any one of the first to ninth aspects, the main unit further acquires a detected value of a high voltage shield current related to a high voltage distribution line of the transformer.

An eleventh aspect of the present invention is an interface box comprising a transformer unit and a main unit, wherein the transformer unit acquires a plurality of load voltages on the low-voltage side of a transformer provided in power receiving and transforming equipment, a plurality of transducers that convert into information; a first AD conversion unit that acquires information from the plurality of transducers and converts it into digital information; a second AD conversion section that acquires and converts into digital information; and an output section that outputs a plurality of pieces of digital information output by the first AD conversion section and the second AD conversion section as load information ; A third AD converter that acquires information detected by a plurality of environment sensors that detect the surrounding conditions of the power receiving and transforming equipment and converts it into a plurality of digital information, and an acquisition unit that acquires the load information output by the transformer unit. Then, environmental information is generated based on a plurality of pieces of digital information output by the third AD conversion unit, and the environmental information and the load information obtained at the same time as the time when the environmental information was generated and the time when the load information was obtained are put together. , and an output unit for outputting to the outside a telegram to which a summarized time is added.

According to the present invention, an interface box for transmitting output values of a plurality of sensors connected to a cubicle as digital signals can be easily installed even when the space for installing units in the cubicle is limited. can be done.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure for demonstrating the outline of the security system which concerns on embodiment. It is a figure which shows an example of the functional block diagram of each apparatus containing the interface box which concerns on embodiment. FIG. 3 is a diagram for explaining an example of arrangement of a main unit and a transformer unit according to the embodiment; FIG. 3 is a diagram for explaining an example of the appearance of a transformer unit according to the embodiment; It is a figure which shows an example of the functional block diagram of the transformer unit which concerns on embodiment. FIG. 3 is a diagram showing an example of a block diagram for explaining a detailed functional configuration of a transformer unit according to the embodiment; FIG. FIG. 4 is a diagram for explaining an example of the appearance of the main unit according to the embodiment; It is a figure which shows an example of the functional block diagram of the main unit which concerns on embodiment. FIG. 4 is a diagram showing an example of a block diagram for explaining a detailed functional configuration of an input section of the main unit according to the embodiment; FIG. FIG. 3 is a diagram showing an example of a block diagram for explaining a detailed functional configuration of a power supply control section of the main unit according to the embodiment;

[Embodiment]
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are merely examples, and embodiments to which the present invention is applied are not limited to the following embodiments.

[Security system]
FIG. 1 is a diagram for explaining an outline of a safety system according to an embodiment. The safety system 1 will be described with reference to the figure. The safety system 1 is used in power receiving and transforming facilities of small and medium-sized private electric facilities that are legally required to be periodically inspected. A plurality of power receiving and transforming facilities are connected to the security system 1 . Information acquired in a plurality of power receiving and transforming facilities is aggregated in the sensor processing server 5B via a predetermined network NW.

The security system 1 includes a cubicle 2, a high voltage distribution line 3, a low voltage distribution line 4, and a sensor processing server 5B. The security system 1 may be connected to a plurality of power receiving and transforming facilities, but in this embodiment, an example in which one power receiving and transforming facility is connected will be described as an example.
Note that the power receiving and transforming equipment may specifically be a cubicle type high voltage power receiving equipment or the like.

The high-voltage distribution line 3 distributes the 6600 [V (volt)] AC power converted at the distribution substation to buildings, medium-scale factories, and the like. In the following description, a consumer who receives power supply from the high-voltage distribution line 3 may be referred to as a high-voltage consumer.

A cubicle 2 is provided for a high voltage consumer. A high-voltage consumer converts the 6600 [V] AC power received from the high-voltage distribution line 3 into 100 [V] or 200 [V] AC power for use.
AC power of 100 [V] or 200 [V] converted to low voltage by a transformer is distributed to the low-voltage distribution line 4 . Various loads are connected to the low voltage distribution line 4 . Examples of various loads connected to the low-voltage distribution line 4 include motors driven by AC power of 100 [V] or 200 [V].

The cubicle 2 is specifically a cubicle-type high-voltage power receiving facility or the like. In the following description, the cubicle 2 may be referred to as power receiving and transforming equipment. The cubicle 2 comprises a smart gateway 15 , an interface box 10 , a transformer 20 and a plurality of environment sensors 30 .
The transformer 20 converts the 6600 [V] AC power received from the high-voltage distribution line 3 into 100 [V] or 200 [V] AC power. The transformer 20 supplies the converted AC power to the low voltage distribution line 4 .

Here, in the cubicle 2, an abnormality such as an electric leak, deterioration of equipment, or failure may occur. The cubicle 2 is equipped with a smart gateway 15, an interface box 10, and a plurality of environment sensors 30 to detect an abnormality such as a short circuit, equipment deterioration, or failure, notify the outside, or receive information from the environment sensor 30. It is transmitted to the sensor processing server 5B. An example of the environment sensor 30 may be described as a first environment sensor 31, a second environment sensor 32, .

The environment sensor 30 detects the circumstances around the cubicle 2 . The conditions surrounding the cubicle 2 may be the temperature and humidity inside the cubicle 2, for example. In this case, the first environment sensor 31 may be a temperature sensor, and the second environment sensor 32 may be a humidity sensor or the like.

The environment sensor 30 outputs the acquired information as environment information IE to the interface box 10 via a sensor unit (not shown) or directly. The information output by the first environment sensor 31 is referred to as first environment information IE1, the information output by the second environment sensor 32 is referred to as second environment information IE2, . It may be described. Also, when the first environment information IE1 to the n-th environment information IEn are not distinguished, they may simply be described as environment information IE.
When the first environment sensor 31 is a temperature sensor, the first environment information IE1 is temperature information inside or around the cubicle 2 . When the second environment sensor 32 is a humidity sensor, the second environment information IE2 is humidity information inside or around the cubicle 2 .
A high-voltage cable shield ground line current (hereinafter referred to as a high-voltage shield current) relating to the high-voltage distribution line entering the transformer is detected by a known method, and the detected result is sent to the interface as well as the information from the environment sensor 30. Box 10 can also be entered. Therefore, the environment information IE input to the interface box 10 thereafter may include information on the high voltage shield current in addition to the information from the environment sensor 30 . Similarly, the information IET converted by the sensor conversion unit 12, which will be described later, may include information obtained by converting the information from the environment sensor 30 as well as information obtained by converting the high voltage shield current. One known method for detecting high voltage shield current is to measure the current flowing around a high voltage distribution line.

The interface box 10 acquires environment information IE from the multiple environment sensors 30 . The interface box 10 also acquires load information IL, which is information about the load current and load voltage flowing through the low-voltage wiring side of the transformer 20 .
The interface box 10 transmits the acquired information on the environment information IE and the load information IL to the smart gateway as cubicle information IC, and outputs the information from the smart gateway to the sensor processing server 5B via a predetermined communication network NW.

[Interface box]
FIG. 2 is a diagram showing an example of a functional configuration diagram of each device including an interface box according to the embodiment. The functional configuration of each device including the interface box 10 will be described with reference to the figure. The interface box 10 includes at least a main unit 13, and is configured by adding a transformer unit 11 and a sensor conversion unit 12 as necessary. Load information IL is input to the transformer unit 11 , and information from the environment sensor 30 is input to the main unit 13 via the sensor conversion unit 12 or directly from the environment sensor 30 . The main unit 13 is connected with the smart gateway 15 . The transformer unit 11, the sensor conversion unit 12, the main unit 13, and the smart gateway 15 may be accommodated in different housings and connected by connection cables.

The transformer unit 11 acquires load information IL. The load information IL is information about the load current and the load voltage that are converted by the transformer 20 provided in the cubicle 2 and flow through the low-voltage distribution line side of the transformer 20 . The transformer unit 11 converts the acquired load information IL into load information ILT, which is a digital signal. The transformer unit 11 outputs the converted load information ILT to the main unit 13 .

The sensor conversion unit 12 acquires the environment information IE from the environment sensor 30 and converts the output value of the environment sensor 30 into a current value. The sensor conversion unit 12 outputs the environment information IET, which is the environment information IE converted into the current value, to the main unit 13 . The environment information IET may be information linearized in the range of 4-20 [mA].
In other words, the main unit 13 acquires the environment information IE from the environment sensor 30 via the sensor conversion unit 12 .

Note that if the output value of the environment sensor 30 matches the input standard of the main unit 13, the output value of the environment sensor 30 can be directly input to the main unit 13 (that is, not via the sensor conversion unit 12). good. By inputting the output value of the environment sensor 30 to the main unit 13 via the sensor conversion unit 12, various kinds of environment sensors 30 can be used. The input standard of the main unit 13 may be, for example, a current input of 4-20 [mA].

The sensor processing server 5B may store the identification number for identifying the cubicle 2, the identification number for identifying the environment sensor 30, and the type of the environment sensor 30 in association with each other. Specifically, the sensor processing server 5B pre-associates the cubicle identification number for identifying the cubicle 2, the channel as the identification number for identifying the environment sensor 30, and the sensor name as the type of the environment sensor 30. , the interface box 10 and the smart gateway 15 need only send information from the channel and the environmental sensor associated with the channel to the sensor processing server 5, and identify the type of the environmental sensor 30. You don't have to.

The main unit 13 acquires environment information IE directly from the environment sensor 30 or through the sensor conversion unit 12 . The main unit 13 acquires the environment information IE from the multiple environment sensors 30 . Also, the main unit 13 acquires the load information IL from the transformer unit 11 . Moreover, as described above, the environment information IE may include the detected value of the high-voltage shield current.
The main unit 13 outputs information including the acquired environment information IE and load information IL to the smart gateway 15 as cubicle information IC1.

Smart gateway 15 acquires cubicle information IC1 from main unit 13 . The smart gateway 15 processes, accumulates, etc. the cubicle information IC1 acquired by the main unit 13 . The smart gateway 15 outputs information contained in the cubicle information IC1 and information processed, accumulated, etc., to a predetermined communication network NW at a predetermined timing. The predetermined communication method may be a TCP/IP format or the like.
In the following description, the smart gateway 15 may be described as a communication unit and included as one unit included in the interface box.

FIG. 3 is a diagram for explaining an example of arrangement of a main unit and a transformer unit according to the embodiment; An example of the arrangement of the main unit 13 and the transformer unit 11 in the cubicle 2 will be described with reference to this figure.

FIG. 3A shows an example in which the main unit 13 and the transformer unit 11 can be arranged side by side in the cubicle 2 . The main unit 13 and transformer unit 11 may be fixed to the wall surface of the cubicle 2, for example. The main unit 13 and transformer unit 11 are connected to each other by a connection cable 41 .

FIG. 3B shows an example of a case where the main unit 13 and the transformer unit 11 cannot be arranged side by side in the cubicle 2 . In this embodiment, the main unit 13 and the transformer unit 11 are accommodated in separate and independent housings, so they can be arranged in an empty space inside the cubicle 2 . The main unit 13 and transformer unit 11 are connected to each other by a connection cable 41 .

The connection cable 41 includes signal lines and power lines. The signal line includes a signal that transmits load information ILT. The power line supplies power for driving each circuit included in the transformer unit 11 . That is, the transformer unit 11 receives power supply via the main unit 13 .
In other words, in the present embodiment, the housing in which the main unit 13 is stored and the housing in which the transformer unit 11 is stored are different housings, and the main unit 13 and the transformer unit 11 store the load information ILT. They are connected by a connection cable 41 including at least signal lines for transmission.
The connection cable 41 may not include a power line, and the main unit 13 and the transformer unit 11 may receive power separately and independently.

An example of arrangement of the main unit 13 and the transformer unit 11 in the cubicle 2 is not limited to the one described above, and the main unit 13 and the transformer unit 11 may be arranged by various arrangement methods.

[Transformer unit]
Next, the transformer unit 11 will be described with reference to FIGS. 4 to 6. FIG.
FIG. 4 is a diagram for explaining an example of the appearance of the transformer unit according to the embodiment; An example of the appearance of the transformer unit 11 will be described with reference to FIG.
Each component included in the transformer unit 11 is housed in a housing 110 . The transformer unit 11 includes an FG terminal 1101, a voltage input connector 1102, a current sensor input connector 1103, and an inter-BOX input/output connector 1104 as components accessible from the outside.

The FG terminal 1101 is connected to the FG (frame ground) of the main board provided in the main unit 13 . The FG terminal 1101 may be connected to the frame of the cubicle 2 by a ground wire (earth wire) not shown.

The voltage input connector 1102 is connected to the low voltage side of the transformer 20 (that is, the low voltage distribution line 4 side) using a three-core cable (not shown). A three-core cable may be provided with a protective fuse. The voltage input connector 1102 may have input terminals for eight channels, for example.

The current sensor input connector 1103 is connected to the low voltage side of the transformer 20 (that is, the low voltage distribution line 4 side) using a two-core cable (not shown). The current sensor input connector 1103 may have input terminals for eight channels, for example.

One end of the connection cable 41 is connected to the inter-BOX input/output connector 1104 . The other end of the connection cable 41 is connected to an inter-BOX input/output connector 1305 provided in the main unit 13 . The inter-BOX input/output connector 1305 will be described later.

FIG. 5 is a diagram illustrating an example of a functional configuration diagram of a transformer unit according to the embodiment; An example of the functional configuration of the transformer unit 11 will be described with reference to FIG. The transformer unit 11 includes a load information acquisition section 111 , an effective value calculation section 112 , a transducer 113 and an A/D conversion section 114 .

Description will be made with reference to FIG. The transformer unit 11 performs load voltage measurement and load current measurement. The transformer unit 11 requires the transducer 113 when performing load voltage measurement and does not require the transducer 113 when performing load current measurement. In the example described below, a case of performing load voltage measurement will be described as an example.
The load information acquisition unit 111 acquires load information IL. The load information acquiring unit 111 outputs the acquired load information IL to the transducer 113 as load information IL1.

Among the load current measurement signal and the load voltage measurement signal included in the load information IL2, the load voltage measurement signal is input to the transducer 113 . Also, the transducer 113 converts AC voltage to DC voltage. The transducer 113 outputs the information obtained by the insulation and signal level conversion to the A/D converter 114 as the load information IL2. A signal for load current measurement is output to the A/D converter 114 without passing through the transducer.

The A/D converter 114 converts the analog value included in the load information IL2 into a digital value. The A/D converter 114 may have a resolution of 24 bits, for example. A/D converter 114 outputs the converted digital value as load information IL3.
The effective value calculator 112 calculates the effective value of the acquired load information IL3. Note that the effective value calculation unit 112 may calculate the effective value of the load information IL acquired every 0.1 [s], for example. The effective value calculator 112 outputs the calculated effective value to the transducer 113 as the load information ILT.

FIG. 6 is a diagram showing an example of a block diagram for explaining the detailed functional configuration of the transformer unit according to the embodiment. A detailed functional configuration of the transformer unit 11 will be described with reference to FIG.
The transformer unit 11 includes a load voltage measuring section 115 , a load current measuring section 116 , an analog circuit power supply circuit 117 , and a connector 119 .

The connector 119 is an example of the inter-BOX input/output connector 1104 described above. One end of the connection cable 41 is connected to the connector 119 . The other end of the connection cable 41 is connected to a connector 139 provided on the main unit 13 .
As an example, the transformer unit 11 obtains power from the main unit 13 via the connection cable 41 . Note that the transformer unit 11 may acquire power from another power input terminal (not shown) instead of acquiring power from the main unit 13 via the connection cable 41 .

The power obtained from the main unit 13 is input to the analog circuit power supply circuit 117 . The analog circuit power supply circuit 117 generates a predetermined power supply voltage based on the acquired power. At least part of the power supply voltage generated by the analog circuit power supply circuit 117 may be used as the analog circuit power supply.

The load voltage measurement unit 115 includes a connector 1150, a first measurement unit 11501, . . . , an eighth measurement unit 11508, and an A/D conversion unit 114-1.
Connector 1150 is an example of voltage input connector 1102 described above. The connector 1150 is connected to the low-voltage side of the transformer 20 (that is, the low-voltage distribution line 4 side) using a three-core cable (not shown). A maximum of eight channels of signals may be input to the connector 1150 .

The first measurement units 11501, . The first measuring section 11501 includes a transformer 1151-1, a resistor 1152-1, and a gain adjustment AMP 1153-1, and the eighth measuring section 11508 includes a transformer 1151-8 and a resistor 1152-8. , and a gain adjustment AMP 1153-8. , and transformer 1151-8 are simply referred to as transformer 1151 when not distinguished, and resistors 1152-1, ..., and resistor 1152-8 are simply referred to as resistor 1152 when not distinguished. , gain adjustment AMP 1153-1, .

Transformer 1151 is, for example, a transducer. That is, the transformer unit 11 has a plurality of transducers for detecting load voltage. A maximum AC voltage of 300 V is input to each transformer 1151 . Resistor 1152 performs IV conversion on the output of transformer 1151 . The gain adjustment AMP 1153 multiplies the IV-converted voltage value by a gain for adjustment.

The A/D converter 114-1 acquires voltage values from up to eight gain adjustment AMPs 1153. FIG. A/D converter 114-1 converts the acquired voltage value (that is, load information IL) into a digital signal. The A/D converter 114-1 has a resolution of 24 bits, for example, and converts the voltage values of 8 channels into digital values. The A/D converter 114-1 outputs the converted digital signal to the main unit 13 by, for example, SPI (Serial Peripheral Interface). At this time, the digital signal output from the A/D conversion section 114-1 is processed into an effective value by a CPU (not shown) and output to the main unit 1. FIG.

The load current measurement unit 116 includes a connector 1160, a first measurement unit 11601, . . . , an eighth measurement unit 11608, and an A/D conversion unit 114-2.
Connector 1160 is an example of current sensor input connector 1103 described above. The connector 1160 is connected to the low-voltage side of the transformer 20 (that is, the low-voltage distribution line 4 side) using a two-core cable (not shown). A maximum of eight channels of signals may be input to the connector 1160 .

The first measurement units 11601, . The first measurement section 11601 has a resistor 1162-1 and a gain adjustment AMP 1163-1, ..., the eighth measurement section 11608 has a resistor 1162-8 and a gain adjustment AMP 1163-8. In the following description, resistors 1162-1, . may be described as

Resistor 1162 performs IV conversion on the signal input to connector 1160 . The gain adjustment AMP 1163 multiplies the IV-converted voltage value by a gain for adjustment.

The A/D converter 114-2 acquires voltage values from up to eight gain adjustment AMPs 1163. FIG. A/D converter 114-2 converts the acquired voltage value (that is, load information IL) into a digital signal. The A/D converter 114-2 has a resolution of 24 bits, for example, and converts voltage values for 8 channels into digital values. The A/D converter 114-2 outputs the converted digital signal to the main unit 13 by, for example, SPI. At this time, the digital signal output from the A/D conversion section 114-2 is arithmetically processed into an effective value by a CPU (not shown) and output to the main unit 13. FIG.

[Main unit]
Next, the main unit 13 will be described with reference to FIGS. 7 to 10. FIG.
FIG. 7 is a diagram for explaining an example of the appearance of the main unit according to the embodiment; An example of the appearance of the main unit 13 will be described with reference to FIG.
Each component included in the main unit 13 is accommodated in the housing 130 . The main unit 13 has an externally accessible configuration including an LED 1301, a power switch 1302, a reset switch 1303, an input connector 1304, an inter-BOX input/output connector 1305, an extension connector 1306, and a gateway DC output connector. 1307 , a DC input connector 1308 and a LAN connector 1309 .

The LED 1301 displays the presence/absence of power supply, the operating state, the state of the remaining battery charge, and the like by lighting in different colors, for example.
A power switch 1302 is a switch for turning on the main unit 13 .
A reset switch 1303 is a switch for resetting a CPU (Central Processing Unit) (not shown) provided in the main unit 13 .
The output value of the environment sensor 30 is input to the input connector 1304 directly or via the sensor conversion unit 12 .

One end of the connection cable 41 is connected to the inter-BOX input/output connector 1305 . The other end of the connection cable 41 is connected to the inter-BOX input/output connector 1104 provided in the transformer unit 11 .

The extension connector 1306 is a spare connector used when extending the function of the interface box 10 . The extension connector 1306 may be connected to, for example, a GPIO (General Purpose Input/Output) terminal of a CPU (not shown) provided in the main unit 13 .

DC power is input to the DC input connector 1308 . The DC input connector 1308 may receive, for example, 12 [V] DC power converted into DC power by a DC adapter (not shown).
The gateway DC output connector 1307 is connected to the smart gateway 15 . The main unit 13 supplies the DC power input to the DC input connector 1308 to the smart gateway 15 via the gateway DC output connector 1307 .
LAN connector 1309 is connected to smart gateway 15 . Main unit 13 outputs cubicle information IC1 to smart gateway 15 via LAN connector 1309 .

FIG. 8 is a diagram illustrating an example of a functional configuration diagram of a main unit according to the embodiment; An example of the functional configuration of the main unit 13 will be described with reference to FIG. The main unit 13 includes an environment information acquisition section 131 , a load information digital value acquisition section 132 , an A/D conversion section 133 , a buffer section 134 , a HUB 135 and an uninterruptible power supply 136 .

The environment information acquisition unit 131 acquires the environment information IET directly from the environment sensor 30 or via the sensor conversion unit 12 . The environment information acquisition unit 131 outputs the acquired environment information IET to the A/D conversion unit 133 as the environment information IET1.

The A/D conversion unit 133 acquires IET1 from the environment information acquisition unit 131 . Since the obtained IET1 is an analog value, the A/D converter 133 converts (A/D converts) the environment information IET1 into a digital value, and outputs the result of the A/D conversion to the buffer unit 134 as the environment information IET2. do.

The load information digital value acquisition unit 132 acquires the load information ILT from the digitized data from the transformer unit 11 . The load information digital value acquisition unit 132 outputs the acquired load information ILT to the buffer unit 134 .

The buffer unit 134 acquires the environment information IET2 from the A/D conversion unit 133 and the load information ILT from the load information digital value acquisition unit 132 . The buffer unit 134 outputs information including the acquired environment information IET2 and load information ILT to the HUB 135 as cubicle information IC.

HUB 135 acquires cubicle information IC from buffer unit 134 . The HUB 135 converts the acquired cubicle information IC into a predetermined communication format and outputs it to the smart gateway 15 . As described above, the environment information IST may include information about the high-voltage shield current. Therefore, the environment information IET1, IET3 after A/D conversion, and the cubicle information IC also include information about the high-voltage shield current. It's okay to be
Specifically, based on the acquired cubicle information IC, the HUB 135 puts it together into a message in a predetermined format and outputs it to the smart gateway 15 . The message includes the load information ILT, the environment information IET, and the time (time stamp) at the time of creation, which were acquired at the same time. Here, the electronic message may contain a plurality of pieces of information in addition to the load information ILT and the environment information IET. The plurality of information contained in the telegram is, for example, about 20 types, and by transmitting the plurality of information collectively for each time, it is possible to suppress the transmission of telegrams corresponding to the number of types of information, Communication can be prevented from becoming complicated.

Here, when a telegram is created and transmitted for each of the load information ILT and the environment information IET, the communication will be congested and it will be difficult to achieve time synchronization between the information. In other words, if time synchronization cannot be achieved, there is a problem that it is not easy to consider measures to be taken in the event of an abnormality. If a mechanism is adopted in which each sensor is connected to a server, a large number of devices will be connected to the server, and communication will become extremely busy, increasing the load on the server side.
According to this embodiment, since the load information ILT and the environment information IET are collected in the interface box 10, it is possible to collect the information in one electronic message, and a plurality of pieces of information are transmitted to the remote server by one transmission. can do. That is, by collectively transmitting a plurality of pieces of information as one electronic message, the types of electronic messages are limited, so communication with the outside can be simplified.

Uninterruptible power supply 136 includes, for example, a nickel metal hydride battery. The uninterruptible power supply 136 supplies power to the main unit 13 and smart gateway 15 during a power failure. The uninterruptible power supply 136 also detects whether or not a power failure has occurred. When the uninterruptible power supply 136 detects that a power failure has occurred, it outputs a power failure trigger TR.
In the following description, the uninterruptible power supply 136 may also be referred to as UPS (Uninterruptible Power Supply).

FIG. 9 is a diagram showing an example of a block diagram for explaining a detailed functional configuration of an input section of the main unit according to the embodiment; A detailed functional configuration of the input section of the main unit 13 will be described with reference to this figure.
The main unit 13 includes a connector 1381, a first sensor input section 137-1, .

Connector 1381 is an example of input connector 1304 described above. The connector 1381 acquires environment information IET directly from the environment sensor 30 or from the sensor conversion unit 12 . In this embodiment, the connector 1381 accepts environment information IEs of up to 12 channels.

The first sensor input section 137-1, . Prepare. The resistors 1371-1, . If the instrumentation AMPs 1372-1, .
A resistor 1371 performs IV conversion of the input current value. The instrumentation AMP 1372 multiplies the converted voltage value by a gain.

The A/D converter 1382 acquires the output value of the instrumentation AMP 1372 . In this embodiment, the A/D conversion unit 1382 has input terminals of 12 channels in order to receive environment information IE of up to 12 channels. The A/D converter 1382 converts the acquired signal into a digital signal. The A/D converter 1382 has a resolution of 24 bits, for example, and converts voltage values for 12 channels into digital values. The A/D converter 1382 outputs the converted digital signal to the CPU 1383 by, for example, SPI.
The CPU 1383 acquires the output value of the environment sensor 30 from the A/D converter 1382 by SPI.

FIG. 10 is a diagram showing an example of a block diagram for explaining a detailed functional configuration of a power control unit of the main unit according to the embodiment; A detailed functional configuration of the power control section of the main unit 13 will be described with reference to the same figure.
The main unit 13 includes connectors 1431 and 1432 as connection interfaces. Connector 1431 is an example of DC input connector 1308 and connector 1432 is an example of gateway DC output connector 1307 .

The main unit 13 includes a main unit board 14 and an uninterruptible power supply 136 . The main unit board 14 has a connector 141 . Connector 141 is connected to uninterruptible power supply 136 .
The main unit board 14 acquires power through the connector 1431 in normal times, and acquires power through the connector 141 in the event of a power failure.

The main unit board 14 includes a battery voltage detector 1421, an FET 1422, a charge controller 1423, a diode 1424, a DCDC converter 1425, a DCDC converter 1426, an eFUSE 1427, an FET 1428, and an eFUSE 1429.

Battery voltage detector 1421 detects the output voltage of uninterruptible power supply 136 . A CPU (not shown) performs control according to the detected output voltage.
The FET 1422 is a P-channel MOSFET (metal-oxide-semiconductor field-effect transistor). The conduction state of the FET 1422 is controlled by a CPU (not shown) to control whether or not to supply the output voltage of the uninterruptible power supply 136 to the DCDC converter 1425 .

The charge control unit 1423 controls whether or not to charge the uninterruptible power supply 136 using the DC power input to the connector 1431 according to the output voltage detected by the battery voltage detection unit 1421 .
Diode 1424 prevents the power supplied from uninterruptible power supply 136 from flowing back to connector 1431 via DCDC converter 1426 or the like.

The DCDC converter 1425 receives the DC power supplied from the uninterruptible power supply 136 or the DC power supplied via the connector 1431, converts the voltage level of the input DC power, and outputs the converted DC power. . The DCDC converter 1425 receives, for example, 17 [V], converts the 17 [V] power into 5 [V] power, and outputs the converted 5 [V] power. The converted DC power of 5 [V] is supplied as power to each circuit provided on the main unit board 14 . Also, the converted DC power of 5 [V] may be further stepped down to 3.3 [V] or the like and used in the main unit board 14 .
The DCDC converter 1426 boosts the DC power of 12 [V] input from the connector 141 to 17 [V].

The eFUSE 1427 incorporates a MOSFET and performs overcurrent protection by controlling the conduction state of the MOSFET at high speed.
FET 1428 is a P-channel MOSFET. The conduction state of the FET 1428 is controlled by a CPU (not shown). FET 1428 has a function for preventing reverse connection.
The eFUSE 1429 incorporates a MOSFET and performs overcurrent protection by controlling the conduction state of the MOSFET at high speed. The eFUSE 1429 is controlled to be enabled by a CPU (not shown) to control whether or not to supply DC power to the smart gateway 15 .

Since the main unit 13 is provided with the circuit described above, it is normally driven by the power supplied from the connector 1431, and driven by the power supplied from the connector 141 during a power failure.
In other words, the uninterruptible power supply 136 included in the main unit 13 is a battery capable of supplying power during a power failure. The main unit 13 is provided with an uninterruptible power supply 136, so that power stored in the uninterruptible power supply (battery) 136 is supplied to the main unit 13 and the smart gateway (communication unit) 15 in the event of a power failure.

Note that the battery capacity of the uninterruptible power supply 136 must be at least the capacity that can acquire the environment information IE and the load information IL even after a power failure and transmit the acquired information via the smart gateway 15. It is preferable to have More specifically, it is preferable that the battery capacity of the uninterruptible power supply 136 is a capacity that allows operation for 10 minutes or longer after a power failure.

[Summary of embodiment]
According to the embodiment described above, the interface box 10 is provided with the transformer unit 11 to acquire the load information IL, which is information about the load current and the load voltage flowing through the low-voltage distribution line 4 of the transformer of the power receiving and transforming equipment. , and outputs the acquired load information IL to the main unit 13 . Further, the interface box 10 acquires the environment information IE detected by the environment sensor 30 that detects the surrounding conditions of the power receiving and transforming equipment by being provided with the main unit 13 , and acquires the load information IL from the transformer unit 11 .
Since the interface box 10 has two housings, the transformer unit 11 and the main unit 13, the size of each unit can be reduced compared to the case of one large housing. Therefore, the interface box 10 has a high degree of freedom of arrangement and can be easily arranged even when the installation inside the cubicle is restricted.

Further, according to the interface box 10 described above, the information of the plurality of environment sensors 30 and the information of the load current and the load voltage are combined into one and output via TCP/IP. Therefore, the processing on the sensor processing server side is easy, and the network load can be reduced.

Further, according to the interface box 10 described above, the housing in which the main unit 13 is housed and the housing in which the transformer unit 11 is housed are different housings, and the main unit 13 and the transformer unit 11 store the load information. They are connected by a connection cable 41 including at least a signal line for transmitting IL. Therefore, according to the present embodiment, when the main unit 13 and the transformer unit 11 are arranged, the mutual installation locations are free as long as they can be connected by the connection cable 41, and even within the narrow cubicle 2. The interface box 10 can be easily arranged.

Further, according to the interface box 10 described above, the main unit includes the A/D conversion section 114 for processing a plurality of data, and the transformer unit 11 includes the plurality of A/D conversion sections 114 and the load voltage for detecting the load voltage. a plurality of transducers 113 of . Therefore, according to the interface box 10, the volume of the device as a whole can be reduced compared to the case where a plurality of transducers are prepared individually. Therefore, according to this embodiment, the layout area of the interface box 10 can be reduced.

Also, according to the interface box 10 described above, the main unit 13 acquires the environment information IE from the plurality of environment sensors 30 . More specifically, the main unit 13 is provided with a plurality of sensor input sections 137 to accept current inputs of 4-20 [mA]. Therefore, according to this embodiment, various abnormalities in the cubicle such as temperature and humidity can be detected.

Further, according to the interface box 10 described above, the transformer unit 11 further includes an A/D conversion section 114-1 and an A/D conversion section 114-2 for converting the acquired load information IL into a digital signal. to a digital signal. The transformer unit 11 outputs the converted digital signal to the main unit 13 . In other words, digital signals are exchanged between the transformer unit 11 and the main unit 13 . Therefore, according to this embodiment, the influence of noise can be reduced.

Further, according to the interface box 10 described above, by providing the sensor conversion unit 12 , the output value of the environment sensor 30 is converted into a current value and output to the main unit 13 . More specifically, according to the interface box 10 , the output information of the environment sensor 30 is linearized by the sensor conversion unit 12 and then input to the main unit 13 . Therefore, according to this embodiment, conversion processing of the output information of the environment sensor 30 on the main unit 13 side is unnecessary, and the configuration of the main unit 13 can be simplified.

Further, according to the interface box 10 described above, by including the smart gateway (communication unit) 15, the environment information IE and the load information IL acquired by the main unit 13 are output to a predetermined network NW. Therefore, according to this embodiment, the interface box 10 can notify the acquired information to the sensor processing server 5B. The sensor processing server 5B acquires detailed information about the cubicle 2 from a plurality of interface boxes 10 included in the security system 1, thereby providing information that can be used as a reference in determining whether or not an abnormality has occurred in the cubicle 2. The information can be presented to the chief electrical engineer, and as a result, it can be used to prevent failures and abnormal situations from occurring.

Further, according to the interface box 10 described above, the main unit 13 is provided with the uninterruptible power supply 136 so that power can be supplied during a power failure. Further, according to the interface box 10, power stored in the uninterruptible power supply 136 is supplied to the main unit 13 and the smart gateway (communication unit) 15 during a power failure. Therefore, according to this embodiment, even in the event of a power failure, it is possible to secure time for continuous operation for a certain period of time. can be transmitted to the sensor processing server 5B, the situation after a power outage can also be grasped.

Further, according to the above-described interface box 10, by providing the transformer unit 11, a plurality of load voltages on the low voltage side of the transformer provided in the power receiving and transforming equipment are acquired, converted into current information, and the first AD conversion unit Acquires information from a plurality of transducers by providing, converts to digital information, acquires multiple load currents on the low voltage side of the transformer provided in the power receiving and transforming equipment by providing a second AD conversion unit, and digital information , and by providing the transformer unit 11, a plurality of digital information output by the first AD converter and the second AD converter are output as load information, and by providing the third AD converter, the surrounding situation of the power receiving and transforming equipment is Acquires information detected by a plurality of environment sensors for detection, converts it into a plurality of digital information, acquires load information output by the transformer unit 11, and acquires a plurality of load information output by the third AD converter by providing the main unit 13. environmental information is generated based on the digital information, the environment information and the load information obtained at the same time as the time when the environmental information was generated and the time when the load information was obtained are summarized, and a telegram with the summarized time is output to the outside. That is, in each of the transformer unit 11 and the main unit 13, one (or two) AD converters are provided for a plurality of inputs. Therefore, according to this embodiment, the number of AD converters can be reduced, and space can be saved.
In addition, the interface box 10 has a main unit 13 that aggregates AD conversion functions for gathering information from a plurality of environmental sensors, and an AD conversion function and transduce function for gathering a plurality of load information in the cubicle. By combining with the integrated transformer unit 11, it is possible to reduce the occupied space compared to the case of preparing and using a plurality of individual devices (AD converters, transducers, etc.) having independent functions.
In addition, since the data transmission function and the power supply of the device are also integrated, the occupied space is expected to be reduced.
In addition, since the information is finally collected in the main unit 13, the information output can be collected into one message, and the information can be transmitted to the remote server from one transmission means.

It should be noted that all or part of the function of each part provided in the security system 1 in the above-described embodiment is obtained by recording a program for realizing these functions in a computer-readable recording medium and recording it in this recording medium. It may be realized by loading the program into a computer system and executing it. It should be noted that the "computer system" referred to here includes hardware such as an OS and peripheral devices.
The term "computer-readable recording medium" refers to portable media such as flexible discs, magneto-optical discs, ROMs and CD-ROMs, and storage units such as hard discs incorporated in computer systems. Furthermore, "computer-readable recording medium" means a medium that dynamically retains a program for a short period of time, like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. It may also include a device that holds a program for a certain period of time, such as a volatile memory inside a computer system that serves as a server or client in that case. Further, the program may be for realizing part of the functions described above, or may be capable of realizing the functions described above in combination with a program already recorded in the computer system.

DESCRIPTION OF SYMBOLS 1... Security system, 2... Cubicle, 3... High voltage distribution line, 4... Low voltage distribution line, 5B... Sensor processing server, 10... Interface box, 11... Transformer unit, 110... Case, 1101... FG terminal, 1102... Voltage Input connector 1103 Current sensor input connector 1104 BOX input/output connector 111 Load information acquisition unit 112 Effective value calculation unit 113 Transducer 114 A/D conversion unit 115 Load voltage measurement unit , 1150... Connector 11501... First measurement unit 11508... Eighth measurement unit 1151... Transformer 1152... Resistor 1153... Gain adjustment AMP 116... Load current measurement unit 1160... Connector 11601... First measurement Part 11608... Eighth measuring part 1162... Resistor 1163... Gain adjustment AMP 117... Power supply circuit for analog circuit 119... Connector 12... Sensor conversion unit 13... Main unit 130... Housing 1301... LED, 1302...Power switch, 1303...Reset switch, 1304...Input connector, 1305...Input/output connector between BOXes, 1306...Extension connector, 1307...DC output connector for gateway, 1308...DC input connector, 1309...LAN connector, DESCRIPTION OF SYMBOLS 131... Environmental information acquisition part 132... Load information digital value acquisition part 133... A/D conversion part 134... Buffer part 135... HUB 136... Uninterruptible power supply 137... Sensor input part 1371... Resistor , 1372 Instrumentation AMP 1381 Connector 1382 A/D converter 1383 CPU 139 Connector 14 Main unit board 141 Connector 1421 Battery voltage detector 1422 FET 1423 Charging control unit 1424 Diode 1425 DCDC converter 1426 DCDC converter 1427 eFUSE 1428 FET 1429 eFUSE 1431 Connector 1432 Connector 15 Smart Gateway 20 Transformer 30 Environment sensors 31... First environment sensor 32... Second environment sensor 3n... n-th environment sensor 41... Connection cable NW... Communication network IL... Load information IE... Environment information ILT... Load information IET ... environment information IC1 ... cubicle information IC2 ... cubicle information

Claims (9)

a transformer unit that acquires a load current and a load voltage on the low voltage side of a transformer provided in a power receiving and transforming facility and outputs load information generated based on the acquired load current and the load voltage;
a main unit that acquires information detected by an environment sensor that detects the surrounding conditions of the power receiving and transforming equipment, generates environmental information based on the acquired information, and acquires the load information from the transformer unit. ,
The transformer unit includes a plurality of transducers that convert the load voltage into current information, a first AD converter that converts information from the plurality of transducers into digital information, and a second AD converter that converts the load current into digital information. and outputting the digital information converted by the first AD conversion unit and the second AD conversion unit to the main unit as the load information,
The main unit includes a third AD converter that acquires information from the plurality of environmental sensors, converts it into digital information, and generates environmental information, and outputs the environmental information and the load information together to the outside.
interface box. A housing in which the main unit is stored and a housing in which the transformer unit is stored are different housings,
2. The interface box according to claim 1, wherein said main unit and said transformer unit are connected by a connection cable including at least a signal line for transmitting said load information. The interface box according to claim 1 , wherein the transformer unit outputs digital information converted by the first AD converter and digital information converted by the second AD converter to the main unit as the load information. 3. The interface box according to claim 1, further comprising a sensor conversion unit that converts the output value of the environment sensor into a current value and outputs the current value to the main unit. 2. The main unit summarizes the environment information and the load information obtained at the same time as the time when the environment information was generated and the time when the load information was obtained, and outputs a telegram to which the time when the time was collected is attached. Or the interface box according to 2. 3. The interface box according to claim 1, further comprising a communication unit that outputs the environment information and the load information acquired by the main unit to a predetermined network. The main unit further comprises a battery capable of supplying power in the event of a power failure,
7. The interface box according to claim 6 , wherein power stored in the battery is supplied to the main unit and the communication unit during a power failure. The interface box according to claim 1 or 2, wherein the main unit further acquires a detected value of high voltage shield current on the high voltage distribution line of the transformer. An interface box comprising a transformer unit and a main unit,
The transformer unit is
A plurality of transducers that acquire a plurality of load voltages on the low voltage side of a transformer installed in a power receiving and transforming facility and convert them into current information;
a first AD converter that acquires information from the plurality of transducers and converts it into digital information;
A second AD conversion unit that acquires a plurality of load currents on the low voltage side of a transformer provided in the power receiving and transforming equipment and converts them into digital information;
an output unit that outputs a plurality of pieces of digital information output by the first AD conversion unit and the second AD conversion unit as load information;
has
The main unit is
a third AD conversion unit that acquires information detected by a plurality of environment sensors that detect the surrounding conditions of the power receiving and transforming equipment and converts the information into a plurality of digital information;
an acquisition unit that acquires the load information output by the transformer unit;
generating environmental information based on a plurality of pieces of digital information output by a third AD converter, and summarizing the environmental information and the load information obtained at the same time as the time when the environmental information was generated and the time when the load information was obtained; and an output unit that outputs a telegram with the time
interface box with

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