JPH08103022A - Power system and monitor for electric facility - Google Patents

Abstract

PURPOSE: To provide a power system and the monitor for an electric facility in which a special measuring instrument like an infrared thermometer is eliminated and a measuring method is easy and which has excellent maintainability and reliability. CONSTITUTION: The power system comprises a temperature sensor 7 mounted at the connector of conductors of the system and an electric facility and a CT 6 mounted in the vicinity of a bus bar connector, a transmitter 4 for transmitting data, and a receiver. A resistor 21 is connected to the secondary side output of the CT 6. It is converted to an AC voltage, which is rectified and smoothed to a DC voltage by a rectifier 22, and a stabilized DC voltage is output by a power source 23 as the power source voltage of the data processor 31 of the transmitter 4. In this case, the voltage applied to the sensor 7 and the processor 31 is common at the secondary side of the CT 6 and the ground.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring device for monitoring the temperature of a connecting portion of conductors of a power system and electric equipment.

[0002]

2. Description of the Related Art A conventional power system and electric equipment monitoring device will be described with reference to FIGS.

FIG. 9 shows wiring in a cubicle which is one of electric equipment. The transformer 38 has a connection part 37 on the primary side, and the secondary side is wired by the booth bar 1.

FIG. 11 shows the connecting portion of the booth bars 1 and 9. Although the connection part is fixed by the bolt 8, internal corrosion may occur due to improper implementation or the external environment, and the electrical resistance value may increase. This increase in the resistance value causes abnormal heat generation due to the applied current. Therefore, if you measure the temperature of the joint, you can detect the abnormality of the joint, but this measurement must be performed while electricity is flowing, and for that purpose the temperature must be measured from the position where the insulation distance from the wire is maintained. . Therefore, conventionally, the temperature is measured in a non-contact manner by an infrared thermometer 40 that converts the infrared radiant energy emitted from the electric wire into an absolute temperature, abnormal heat generation at the connection portion is detected, and a failure or the like is monitored.

Further, as shown in FIG. 10, also in the case of a power transmission tower, similarly to the above, the temperature measurement of the connection portion 44 of the power transmission line 43 of the power transmission tower 42 is performed by using an infrared thermometer installed in the power transmission tower 42 without contact. The temperature was measured and the failure was monitored.

[0006]

However, since such a conventional monitoring apparatus for electric power systems and electric equipment is based on the principle of converting infrared radiant energy into absolute temperature, the emissivity varies depending on the surface condition of the object to be measured. Therefore, it is necessary to set the emissivity in advance according to the condition of the joint surface.

Further, in the power transmission tower 42, if there is a heat source such as the sun or illumination in the background of the object to be measured, there is a drawback that a measurement error occurs due to the influence.

Further, since this device is expensive and it is an optical detection, the detection sensitivity changes due to dirt on the surface of the detector, so that it is necessary to clean the surface of the light receiving portion of the detector.

The present invention solves the above-mentioned problems and requires no special measuring instrument such as the infrared thermometer 40, has a simple measuring method, and is excellent in maintainability and reliability. The purpose is to provide a monitoring device.

[0010]

In order to achieve the above object, a power system and electric equipment monitoring device according to the present invention includes a temperature sensor attached to a conductor connecting portion of a power system and electric equipment, and a conductor connecting portion. A display device that includes a CT attached in the vicinity, a transmitter that transmits measurement data, and a receiver that receives the transmitted measurement data, and that displays the measurement data received by the receiver, or At least one of storage devices for storing the measurement data is provided, and the transmitter includes a resistor for converting the CT output into an AC voltage, a rectifier circuit for rectifying the AC voltage, and a rectifier circuit for rectifying the AC voltage. A power supply circuit for stabilizing the output, an amplifier for amplifying a temperature signal from the temperature sensor through a filter,
A for converting the amplified temperature signal into digital data
/ D converter, a clock for counting the time at the time of measurement, a communication processing circuit for converting the temperature data and time data into a transmission data format, a modulation circuit for modulating the transmission data, and a modulated data And a transmission circuit for performing transmission.

Further, there is provided a comparison means for comparing the measured temperature of the conductor connecting portion with a preset temperature, and an alarm device for issuing an alarm when the measured temperature is equal to or higher than the preset temperature, or a temperature equal to or higher than the preset temperature. Further, at least one of a display device for displaying each data of the measurement time and the measurement temperature, or a storage device for storing the data is provided.

Further, a temperature sensor attached to a conductor connecting portion of a power system and an electric facility, a CT attached in the vicinity of the conductor connecting portion, a transmitter for transmitting measurement data, and the transmitted measurement data. And a receiver for receiving the measurement data, and at least one of a display device for displaying the measurement data received by the receiver or a storage device for storing the measurement data.
A resistor for converting an output into an AC voltage, a rectifier circuit for rectifying the AC voltage, a power supply circuit for stabilizing the output of the rectifier circuit, and an amplifier for amplifying a temperature signal from the temperature sensor through a filter. A voltage dividing circuit for dividing the rectifier circuit output, an A / D converter for converting the voltage dividing circuit output and the amplified temperature signal into digital data, a clock for counting the time at the time of measurement, and the temperature data And a communication processing circuit for converting time data into a transmission data format, a modulation circuit for modulating the transmission data, and a transmission circuit for transmitting the modulated data.

Further, there is provided a comparing means for comparing the measured temperature and the measured current value of the conductor connecting portion with the preset temperature and the preset current value, and the measured temperature and the measured current value are the preset temperature and the preset current. An alarm device that issues an alarm when the value exceeds the specified value, or a display device that displays each data of the measurement time, the measured temperature, and the measured current value that is above the set temperature and reaches the set current value, or a storage device that stores the data. It is equipped with at least one.

Further, N number of address-assigned temperature sensors attached to the connecting portions of the conductors of the electric power system and the electric equipment and N CTs attached in the vicinity of the connecting portions of the conductors.
A display device for displaying the measurement data received by the receiver, or the measurement data, comprising N transmitters for transmitting the measurement data and a receiver for receiving the transmitted measurement data. At least one of storage devices for storing, each of the transmitters converts the CT output to an AC voltage, a rectifier circuit that rectifies the AC voltage, and an output of the rectifier circuit. A power supply circuit for stabilizing the temperature, an amplifier for amplifying the temperature signal from the temperature sensor through a filter, an A / D converter for converting the amplified temperature signal into digital data, and counting the time at the time of measurement. A clock, an address switch for specifying the address of the transmitter, a communication processing circuit for converting the temperature data and time data into a transmission data format, and a modulation circuit for modulating the transmission data. , In which a transmission circuit for transmitting the modulated data.

An alarm device is provided which comprises a comparing means for comparing the measured temperature of the N conductor connection portions to which addresses are assigned with a preset temperature, and gives an alarm when the measured temperature exceeds the preset temperature. Alternatively, it is provided with at least one of a display device that displays each data of the address and the measurement time and the measurement temperature that are equal to or higher than the set temperature, or a storage device that stores the data.

Further, N number of address-assigned temperature sensors attached to the connecting portions of the conductors of the electric power system and the electric equipment and N CTs attached in the vicinity of the connecting portions of the conductors.
A display device for displaying the measurement data received by the receiver, or the measurement data, comprising N transmitters for transmitting the measurement data and a receiver for receiving the transmitted measurement data. At least one of storage devices for storing, each of the transmitters converts the CT output to an AC voltage, a rectifier circuit that rectifies the AC voltage, and an output of the rectifier circuit. A power supply circuit that stabilizes the temperature signal, an amplifier that amplifies the temperature signal from the temperature sensor through a filter, a voltage dividing circuit that divides the rectifier circuit output, and a voltage dividing circuit output and the amplified temperature signal are digital data. A / D converter for converting to, a clock for counting the time at the time of measurement, an address switch for specifying the address of the transmitter, and the temperature data and time data in a transmission data format. A communication processing circuit for conversion, a modulation circuit for modulating the transmission data, in which a transmission circuit for transmitting the modulated data.

Further, there is provided comparison means for comparing the measured temperature and the measured current value of the N conductor connection portions to which the addresses are assigned with a preset set temperature and current value, and the measured temperature and the measured current value are set to the set value. An alarm device that issues an alarm when the temperature exceeds the set current value, or an address that becomes the set temperature or more and the set current value, and a display device that displays each data of the measurement time, the measured temperature, and the measured current value, or At least one of the storage devices for storing data is provided.

[0018]

The present invention has the above-described structure. (1) The temperature is detected by the temperature sensor attached to the connection portion of the conductor of the electric power system and the electric equipment, and the power is taken from the CT attached to the conductor, and the rectifier circuit is provided. Converts alternating current into direct current, and the power supply circuit stabilizes direct current voltage,
A DC voltage common to the GND potential of the conductor of the electric system is supplied as a power source for the circuit of the transmitter. The temperature sensor has a transmitter filter circuit to remove unnecessary noise.
It is amplified to a constant voltage by an amplifier, converted to digital temperature data by an A / D converter, converted to a transmission data format including measurement temperature data and measurement time by a communication processing circuit, and wireless transmission data by a modulation circuit. It is converted to a format and transmitted by the transmitting circuit to the receiver via the transmitting antenna. The receiver demodulates the transmitted data, the demodulated temperature data and time data are displayed on the display device, and the storage device stores the data. (2) The measured temperature of the conductor connecting portion is compared with a preset temperature, and when the measured temperature is equal to or higher than the set temperature, a fault diagnosis is made as an abnormal temperature rise of the conductor connecting portion, and an alarm is issued by an alarm device and displayed. The device displays the measured temperature and the measured time data, and the storage device stores the data. (3) The output of the rectifier is divided by the voltage dividing circuit within the input range of the A / D converter and converted into a digital current value by the A / D converter, which is then communicated with the temperature data in the communication processing circuit. The data is transmitted in the format, and the receiver demodulates the transmitted data. The demodulated temperature data and current value data are displayed on the display device, and the storage device stores the data. (4) Compare the measured temperature and the measured current value of the conductor connection part with a preset temperature and the current value, and if the measured temperature is equal to or higher than the set temperature and the measured current value, the conductor connection part has an abnormal temperature rise and fails. Diagnosis is made and an alarm is issued by an alarm device, a measurement temperature, a measurement current value, and a measurement time are displayed by a display device, and the data is stored by a storage device. (5) The N temperature sensors attached to the connection parts of the conductors of the power system and the electric equipment are assigned addresses by the DIP switch of the transmitter, and the power is taken from each of the N CTs installed near the conductor connection parts. The rectifier circuit converts AC into DC, the power supply circuit stabilizes the DC voltage, and the DC voltage common to the GND potential of the conductor of the electric system is supplied as the power supply for the circuit of the transmitter. Further, in the temperature sensor, unnecessary noise is removed by a filter circuit of a transmitter, amplified to a constant voltage by an amplifier, converted into digital temperature data by an A / D converter, and measured temperature data by a communication processing circuit, Converted to a transmission data format that includes the measurement time, source address, and destination address, and converted to a wireless transmission data format by the modulation circuit,
The signal is transmitted by the transmitting circuit to the receiver via the transmitting antenna. The receiver demodulates the transmitted data, the demodulated temperature data, time data, source address, and destination address data are displayed on the display device, and the storage device stores the data. (6) The measured temperature of the N conductor connection portions is compared with a preset temperature, and when the measured temperature is equal to or higher than the set temperature, the fault diagnosis is performed as the abnormal temperature increase of the conductor connection portion,
An alarm is issued by the alarm device, and data of the measured temperature, measurement time, source address and destination address are displayed on the display device, and the data is stored. (7) The output of the rectifier is divided by the voltage dividing circuit within the input range of the A / D converter and converted into a digital current value by the A / D converter, and the communication processing circuit combines it with the temperature data for communication. Formatted and transmitted by the transmitting circuit to the receiver via the transmitting antenna. The receiver demodulates the transmitted data, and demodulated measured temperature data, measured current value data, time data, source address,
The data of the destination address is displayed by the display device, and the storage device saves the data. (8) The measured temperature and the measured current value of the N conductor connection parts are compared with the preset temperature and the current value, and when the measured temperature becomes equal to or higher than the set temperature and the measured current value, the abnormal temperature of the conductor connection part rises. Assuming that there is a failure, a fault is diagnosed, an alarm is issued by an alarm device, data of measured temperature, measured current value, measurement time, source address and destination address are displayed on a display device, and the data is stored by a storage device.

[0019]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

As shown in FIG. 9, in the cubicle 36, which is one of the electric equipment, the high-voltage line on the primary side is transformed into a voltage on the secondary side by the transformer 38, and the load of the secondary side is wired by the booth bar 1 and branched. In this case, as shown in FIG. 1, the booth bar 1 and the booth bar 9 are connected by bolts 8.

In FIG. 1, a temperature sensor 7 is attached near the connecting portion of the booth bar. Here, the temperature sensor 7 may be selected from a thermistor, PT100, and other general temperature sensors depending on the measurement accuracy. The output of the temperature sensor 7 is connected to the transmitter 4.

Next, the CT attached to the booth bar 1
6 is attached to the booth bar 1 at the primary side of CT6, and 2
The secondary output is input for the power supply of the transmitter 4.

Next, FIG. 3 shows the internal structure of the transmitter 4.
In FIG. 3, a resistor 21 is connected to the secondary side output of CT6 to convert it into an AC voltage, which is smoothed into a DC voltage by a rectifier circuit 22 and a stabilized DC voltage is output by a power supply circuit 23, and a transmitter 4 of It is the power supply voltage of the data processing circuit 31.
In this case, the temperature sensor 7 and the data processing circuit 3
Since the voltage applied to 1 is common to the secondary side of CT6 and ground, even if the voltage of the booth bar 1 is high, the resistance 21
It will be less than the voltage applied to. Therefore, a general-purpose electronic circuit operates even in a high voltage environment.

The power supply circuit 23 may use either a three-terminal regulator or a switching regulator depending on the range of the input voltage.

Next, the output of the temperature sensor 7 is filtered to remove unnecessary noise, amplified by the amplifier 26 to a constant voltage, and converted into digital temperature data by the A / D converter 27.

Next, the communication processing circuit 24 converts the temperature data into a communication format data format in which temperature measurement time data and an error check code are added.

The communication format in this embodiment is an example, and another communication format may be used as long as communication between the transmitter 4 and the receiver 11 is possible.

The data converted into the above-mentioned communication format format is modulated by the modulation circuit 28 into a signal format for wireless transmission. Regarding the modulation method, this embodiment uses FSK
Although modulation is used, another modulation method may be used as long as communication between the transmitter 4 and the receiver 11 is possible.

The modulated signal is converted into an RF signal by the transmitting circuit 29 and transmitted to the receiver 11 via the transmitting antenna 3. The receiver 11 demodulates the data, the demodulated temperature data and time data are displayed on the display device 12, and the storage device 13 saves the data.

As described above, according to the power system and electric equipment monitoring apparatus of the embodiment of the present invention, the temperature sensor 7 is directly attached to the connecting portion of the booth bars 1 and 9, and the measuring circuit is powered by the CT6 of the booth bar 1. By using a common ground, high voltage is not applied to the measuring circuit even in a high voltage environment, and the temperature can be measured in the energized state. Further, the measured temperature data is insulated from the receiving side by wireless transmission, so that the temperature data can be safely monitored.

Further, since the transmitter takes power from CT6, no battery is required, and maintenance such as battery replacement is unnecessary.

In this embodiment, an example of abnormal temperature monitoring of the wiring of the booth bars 1 and 9 on the secondary side of the transformer is shown, but the same effect can be obtained by using the wiring on the primary side. The same effect can be obtained even if the temperature sensor 7 is attached to a place other than the booth bar joint, for example, a joint between the transformer 38 and the power cable or a joint between devices such as a circuit breaker and a switch.

Further, also in the connection portion 44 of the power transmission line 43 in the power transmission tower 42 of FIG. 10, the same effect can be obtained by the configuration of the above device.

(Embodiment 2) Next, a second embodiment of the present invention will be described with reference to FIGS.

A block diagram of the transmitter 4 of the monitoring apparatus of FIG. 1 is shown in FIG. 4, and the output of the rectifying circuit 22 shows the value of the current flowing in the connecting portion of the conductor. The output voltage of this current value is divided by the voltage dividing circuit 3
It is connected to 0 and input to the A / D converter 27. Voltage dividing circuit 3
The voltage division ratio of 0 is A / D converter 27 even when the current is maximum.
Set it so that it does not exceed the input range of. Similar to the first embodiment, the output of the A / D converter 27 converted into a digital current value is converted by the communication processing circuit 24 into a transmission data format. For example, the temperature data, the current value data, the measurement time data, and the error check code. Further, the receiver 11 demodulates the data, and the demodulated temperature data, current value data, and time data are displayed on the display device 12, and the storage device 13 saves the data.

As described above, according to the monitoring apparatus for the electric power system and the electric equipment of the embodiment of the present invention, the current value detected by the CT6 is also monitored together with the temperature measured by the temperature sensor 7, so that the abnormal temperature rises. Since the currents can be measured together, it is possible to more easily and accurately obtain information without an electrical abnormality state, as compared with the conventional case where the infrared temperature sensor and the measuring CT are separately combined and monitored.

(Embodiment 3) Next, a third embodiment of the present invention will be described with reference to FIG.

In FIG. 2, the receiver 11 is the same as in the first embodiment.
The temperature data and the time data are received by, but the measured temperature of the conductor connecting portion and the preset temperature are compared by the comparator 15, and when the measured temperature is equal to or higher than the set temperature, it is considered that the conductor connecting portion has an abnormal temperature rise. The failure is diagnosed, an alarm is issued by the alarm device 14, the measured temperature and the measurement time data are displayed on the display device 12, and the storage device 13
Store the data.

As described above, according to the power system and electric equipment monitoring apparatus of the third embodiment of the present invention, the received measured temperature of the conductor connecting portion is compared with the abnormal temperature set at that time. You can diagnose the failure immediately. Further, higher accuracy and higher reliability are ensured than in the case of the conventional temperature sensor using infrared rays. Furthermore, since maintenance of the light receiving portion of the infrared sensor is unnecessary, unattended failure diagnosis can be performed.

(Fourth Embodiment) Next, a fourth embodiment of the present invention will be described with reference to FIGS.

2 and 4, temperature data, current value data, and time data are received by the receiver 11 as in the case of the second embodiment, but the measured temperature and the measured current at the conductor connecting portion are measured at the same time, and the comparator 15 To compare each setting value,
When the set value is exceeded, an alarm is issued by the alarm device 14,
The display device 12 displays the data of the measurement temperature, the measurement current, and the measurement time, and the storage device 13 stores the data.

As described above, according to the power system and electric equipment monitoring apparatus of the fourth embodiment of the present invention, the received measured temperature and measured current of the conductor connecting portion are set to the abnormal temperature and the abnormal current set at that time. Since the comparison is performed, it is possible to diagnose the failure immediately.

Further, by comparing the set current values,
It is also possible to determine an electrical failure such as a short circuit or disconnection.
Further, by detecting the abnormal current first before the temperature of the conductor connecting portion becomes abnormal, an alarm can be issued before a serious accident occurs.

Further, as compared with the conventional temperature sensor using infrared rays, high accuracy and high reliability are secured. further,
Since no maintenance is required for the light receiving part of the infrared sensor, unattended failure diagnosis can be performed.

(Fifth Embodiment) Next, a fifth embodiment of the present invention will be described with reference to FIGS. 1, 5 and 7.

N transmitters 4, CTs 6 and temperature sensors 7 shown in FIG. 1 are installed in each power system and electric equipment. The configuration of the transmitter 4 is shown in FIG. 5, but in addition to the case of the first embodiment, an address switch 35 is provided so that the location of each facility can be specified. The measurement data including the address set for each location is converted by the communication processing circuit 24 into a communication format as shown in FIG. Here, the header and the error check code are determined by the communication characteristics. Less than,
Similar to the first embodiment, the receiver 11 demodulates the temperature data, time data, source address, and destination address data, the temperature data and time data for each installation location are displayed on the display device 12, and the storage device 13 is used. Data is saved.

As described above, according to the monitoring system for the electric power system and the electric equipment of the fifth embodiment of the present invention, the temperature measured at each installation place is monitored, so that the accuracy of each equipment can be improved.
In addition, it is possible to carry out monitoring by specifying the monitoring location. For example, the temperature of each phase of the three-phase power transmission line can be monitored.

(Sixth Embodiment) Next, a sixth embodiment of the present invention will be described with reference to FIGS.

Similar to the fifth embodiment, the transmitter 4, CT
6, N temperature sensors 7 are installed in each electric power system or electric equipment, the communication format data as shown in FIG. 7 is demodulated by the receiver 11, and the temperature data, time data, source address, Upon receiving the destination address, the measured temperature of the conductor connecting portion for each installation place is compared with a preset temperature by the comparator 15. When the measured temperature is equal to or higher than the set temperature, the abnormal temperature of the conductor connecting portion rises. The installation location is specified to perform a failure diagnosis, an alarm is issued by the alarm device 14, the measured temperature and the measurement time data are displayed on the display device 12, and the storage device 13 stores the data.

As described above, according to the monitoring system for the electric power system and the electric equipment of the sixth embodiment of the present invention, the received measured temperature at each installation location of the conductor connecting portion is regarded as the abnormal temperature set at that time. Since the comparison is performed, the failure of a plurality of conductor connecting portions or conductors can be immediately diagnosed. Further, higher accuracy and higher reliability are ensured than in the case of the conventional temperature sensor using infrared rays. Further, since maintenance of the light receiving portion of the infrared sensor is unnecessary, unattended failure diagnosis of a plurality of power systems and power equipment can be performed.

(Embodiment 7) Next, a seventh embodiment of the present invention will be described with reference to FIGS. 1, 6 and 8.

N transmitters 4, CTs 6 and temperature sensors 7 shown in FIG. 1 are installed in each power system and electric equipment. The configuration of the transmitter 4 is shown in FIG. 6, but in addition to the case of the second embodiment, an address switch 35 is provided so that the location of each facility can be specified. The measurement data of the temperature and the current including the address set for each place is shown in FIG.
It is converted into the communication format as shown in. here,
The header and error check code are determined by the communication characteristics. Thereafter, similar to the fifth embodiment, the receiver 11 demodulates the temperature data, the current value data, the current value data, the time data, the source address, the destination address data, and the temperature data, the current value data, The time data is displayed by the display device 12, and the storage device 13 saves the data.

As described above, according to the monitoring system for the electric power system and the electric equipment of the seventh embodiment of the present invention, the temperature and the current value measured at each installation location are monitored, so that the accurate monitoring for each equipment can be performed. It can be carried out. For example, the temperature and current value of each phase of the three-phase power transmission line can be monitored.

(Embodiment 8) Next, an eighth embodiment of the present invention will be described with reference to FIGS. 2, 6 and 8.

N transmitters 4, CTs 6 and temperature sensors 7 shown in FIG. 2 are installed in each power system and electric equipment. Further, the transmitter 4 operates in the same manner as in Example 7, the receiver 11 demodulates communication format data as shown in FIG. 8, and temperature data, current value data, time data, source address, The destination address is received, and the measured temperature and the measured current value of the conductor connection portion for each installation location are compared by the comparator 15 with the preset temperature and the set current value. When the current value exceeds the set current value, the abnormal temperature rise of the conductor connection part and the installation place where the current is abnormal are specified to diagnose the failure, and the alarm device 14 issues an alarm.
With the display device 12, measurement temperature, measurement current, measurement time,
The data of the address of the transmitter is displayed, and the storage device 13 stores the data.

As described above, according to the monitoring apparatus for the electric power system and the electric equipment of the eighth embodiment of the present invention, the measured temperature and measured current for each installation location of the conductor connecting portion are set at that time. Since the abnormal temperature and the abnormal current are compared, it is possible to immediately diagnose the failure at each installation location.

Further, by comparing the set current values,
It is also possible to determine an electrical failure such as a short circuit or disconnection.
Further, by detecting the abnormal current first before the temperature of the conductor connecting portion becomes abnormal, an alarm can be issued before a serious accident occurs.

Further, as compared with the case of the conventional temperature sensor using infrared rays, high accuracy and high reliability are secured. further,
Since no maintenance is required for the light receiving part of the infrared sensor, unattended failure diagnosis can be performed.

[0059]

As is apparent from the above description, according to the power system and electric equipment monitoring apparatus of the present invention, (1) a temperature sensor is attached to a connecting portion of a conductor of the power system and electric equipment, and a power source of CT is attached. The temperature of the high voltage part can be measured by using the measurement circuit that uses the power circuit, and the temperature data can be wirelessly transmitted by the transmitter, which can be insulated from the receiving side, which is simple, highly accurate, and does not require maintenance. Monitoring device can be provided. (2) By monitoring the current value detected by CT and the temperature measured by the temperature sensor together, the current when abnormal temperature rise can be measured together, so conventionally, the infrared temperature sensor and the CT for measurement were combined separately. As compared with the case of monitoring by using the above-described method, information having no electrical abnormal state can be obtained more easily and accurately. (3) Since the received measured temperature of the conductor connecting portion is compared with the abnormal temperature set at that time, it is possible to immediately diagnose the failure. Moreover, compared to the case of the conventional temperature sensor using infrared rays,
High accuracy and high reliability are secured. Furthermore, since maintenance of the light receiving portion of the infrared sensor is unnecessary, unattended failure diagnosis can be performed. (4) Since the measured temperature and measured current of the received conductor connection portion are compared with the abnormal temperature and abnormal current set at that time, a fault diagnosis can be performed immediately. Further, by comparing the set current values, it is possible to determine an electrical failure such as a short circuit or a disconnection. By detecting the abnormal current before the temperature of the conductor connection becomes abnormal, an alarm can be issued before a serious accident occurs.

Further, as compared with the case of the conventional temperature sensor using infrared rays, high accuracy and high reliability are secured. further,
Since no maintenance is required for the light receiving part of the infrared sensor, unattended failure diagnosis can be performed. (5) By monitoring the temperature measured at each installation location, it is possible to perform accurate monitoring for each facility and specifying the monitoring location. For example, the temperature of each phase of the three-phase power transmission line can be monitored. (6) Since the received measured temperature for each installation location of the conductor connection portion is compared with the abnormal temperature set at that time, a failure diagnosis of a plurality of conductor connection portions or conductors can be immediately performed. Moreover, compared to the case of the conventional temperature sensor using infrared rays,
High accuracy and high reliability are secured. Further, since maintenance of the light receiving portion of the infrared sensor is unnecessary, unattended failure diagnosis of a plurality of power systems and power equipment can be performed. (7) By monitoring the temperature and current value measured at each installation location, accurate monitoring can be performed for each facility. For example, the temperature and current value of each phase of the three-phase power transmission line can be monitored. (8) Since the measured temperature and the measured current of the received conductor connecting portion for each installation location are compared with the abnormal temperature and the abnormal current set at that time, the failure diagnosis for each installation location can be performed immediately.

Further, by comparing the set current values,
It is also possible to determine an electrical failure such as a short circuit or disconnection.
Further, by detecting the abnormal current first before the temperature of the conductor connecting portion becomes abnormal, an alarm can be issued before a serious accident occurs.

Further, higher accuracy and higher reliability are ensured than in the case of the conventional temperature sensor using infrared rays. further,
Since no maintenance is required for the light receiving part of the infrared sensor, unattended failure diagnosis can be performed.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a power system and electric equipment monitoring device according to first, second, fifth, and seventh embodiments of the present invention.

FIG. 2 is a diagram showing a configuration of a power system and electric equipment monitoring device according to third, fourth, sixth, and eighth embodiments of the present invention.

FIG. 3 is a diagram showing a configuration of a transmitter of a power system and electric equipment monitoring device according to first and third embodiments of the present invention.

FIG. 4 is a diagram showing a configuration of a transmitter of a monitoring device for power systems and electrical equipment according to second and fourth embodiments of the present invention.

FIG. 5 is a diagram showing a configuration of a transmitter of a monitoring device for power systems and electrical equipment according to fifth and sixth embodiments of the present invention.

FIG. 6 is a diagram showing a configuration of a transmitter of a monitoring device for power systems and electrical equipment according to seventh and eighth embodiments of the present invention.

FIG. 7 is a diagram showing a communication format configuration in a communication processing circuit of a transmitter of a monitoring device for power systems and electrical equipment according to fifth and sixth embodiments of the present invention.

FIG. 8 is a diagram showing a communication format configuration in a communication processing circuit of a transmitter of a monitoring device for power systems and electrical equipment according to seventh and eighth embodiments of the present invention.

FIG. 9 is a diagram showing a configuration of a cubicle of electric equipment.

FIG. 10 is a diagram showing connection of power transmission lines.

FIG. 11 is a diagram showing a configuration of a conventional power system and electrical equipment monitoring device.

[Explanation of symbols]

 1, 9 Booth bar 4 Transmitter 6 CT 7 Temperature sensor 11 Receiver 12 Display device 13 Memory device 14 Alarm device 15 Comparator 21 Resistance 22 Rectifier circuit 23 Power supply circuit 24 Communication processing circuit 25 Filter 26 Amplifier 27 A / D converter 28 Modulation circuit 29 Transmission circuit 30 Voltage dividing circuit 33 Clock 35 Address switch

Claims (8)

[Claims] 1. A temperature sensor attached to a conductor connecting portion of an electric power system and an electric facility, a CT attached near the conductor connecting portion, a transmitter for transmitting measurement data, and the transmitted measurement data. Equipped with a receiver for receiving
At least one of a display device for displaying the measurement data received by the receiver or a storage device for storing the measurement data, wherein the transmitter is a resistor for converting the CT output into an AC voltage. A rectifier circuit that rectifies the AC voltage, a power supply circuit that stabilizes the output of the rectifier circuit, an amplifier that amplifies the temperature signal from the temperature sensor through a filter, and the amplified temperature signal is digital data. Convert to A / D
A converter, a clock for counting the time at the time of measurement, a communication processing circuit for converting the temperature data and the time data into a transmission data format, a modulation circuit for modulating the transmission data, and a transmission of the modulated data. A monitoring apparatus for a power system and an electric facility, which includes a transmitting circuit for performing. 2. An alarm device for providing a warning when the measured temperature of the conductor connecting portion is compared with a preset temperature, and an alarm device for issuing an alarm when the measured temperature is equal to or higher than the preset temperature or equal to or higher than the preset temperature. The monitoring device for the electric power system and the electric equipment according to claim 1, further comprising at least one of a display device for displaying each data of the measurement time and the measurement temperature, or a storage device for storing the data. 3. A temperature sensor attached to a conductor connecting portion of an electric power system and an electric facility, a CT attached near the conductor connecting portion, a transmitter for transmitting measurement data, and the transmitted measurement data. Equipped with a receiver for receiving
At least one of a display device for displaying the measurement data received by the receiver or a storage device for storing the measurement data, wherein the transmitter is a resistor for converting the CT output into an AC voltage. A rectifier circuit for rectifying the AC voltage, a power supply circuit for stabilizing the output of the rectifier circuit, an amplifier for amplifying a temperature signal from the temperature sensor through a filter, and a voltage divider for dividing the rectifier circuit output. Circuit and A for converting the voltage divider output and the amplified temperature signal into digital data
/ D converter, a clock for counting the time at the time of measurement, a communication processing circuit for converting the temperature data and time data into a transmission data format, a modulation circuit for modulating the transmission data, and a modulated data A monitoring device for a power system and an electric facility, which includes a transmission circuit that performs transmission. 4. A comparison means for comparing a measured temperature and a measured current value of a conductor connecting portion with a preset temperature and a preset current value, wherein the measured temperature and the measured current value are the preset temperature and the preset current, respectively. An alarm device that issues an alarm when the value exceeds the specified value, or a display device that displays each data of the measurement time, the measured temperature, and the measured current value that is above the set temperature and reaches the set current value, or a storage device that stores the data. The power system and electrical equipment monitoring device according to claim 3, comprising at least one. 5. N address-assigned temperature sensors attached to connection portions of conductors of electric power systems and electrical equipment, and N CTs attached in the vicinity of the connection portions of the conductors.
A display device including N transmitters for transmitting measurement data and a receiver for receiving the transmitted measurement data, and a display device for displaying the measurement data received by the receiver, or storage of the measurement data At least one of the storage devices for performing the above, each of the transmitters stabilizes the output of the rectifier circuit, a resistor for converting the CT output into an AC voltage, a rectifier circuit for rectifying the AC voltage. A power supply circuit, an amplifier for amplifying a temperature signal from the temperature sensor via a filter, an A / D converter for converting the amplified temperature signal into digital data, and a clock for counting time at the time of measurement. An address switch for specifying the address of the transmitter, a communication processing circuit for converting the temperature data and time data into a transmission data format, and a modulation circuit for modulating the transmission data, A monitoring device for a power system and electrical equipment, comprising a transmission circuit for transmitting modulated data. 6. An alarm device, comprising: comparing means for comparing the measured temperature of the N conductor connection parts to which addresses are assigned with a preset temperature, and an alarm device for issuing an alarm when the measured temperature exceeds the preset temperature. Alternatively, a display device for displaying each data of the address and the measurement time and the measurement temperature which are above the set temperature,
Alternatively, the monitoring device for the electric power system and the electric equipment according to claim 5, further comprising at least one of a storage device that stores the data. 7. N address-assigned temperature sensors attached to connection portions of conductors of electric power systems and electrical equipment, and N CTs attached near conductor connection portions,
A display device including N transmitters for transmitting measurement data and a receiver for receiving the transmitted measurement data, and a display device for displaying the measurement data received by the receiver, or storage of the measurement data At least one of the storage devices for performing the above, each of the transmitters stabilizes the output of the rectifier circuit, a resistor for converting the CT output into an AC voltage, a rectifier circuit for rectifying the AC voltage. Power supply circuit, an amplifier for amplifying a temperature signal from the temperature sensor through a filter, a voltage dividing circuit for dividing the output of the rectifying circuit, and a voltage dividing circuit output and the amplified temperature signal are converted into digital data. A / D converter, a clock for counting the time at the time of measurement, an address switch for specifying the address of the transmitter, and the temperature data and time data are converted into a transmission data format. A monitoring apparatus for a power system and an electric facility, comprising: a communication processing circuit for controlling the transmission data; a modulation circuit for modulating the transmission data; and a transmission circuit for transmitting the modulated data. 8. A comparison means is provided for comparing the measured temperature and measured current value of the N conductor connection portions to which addresses are assigned with preset set temperature and current value, wherein the measured temperature and measured current value are set to the set value. An alarm device that issues an alarm when the temperature exceeds the set current value, or an address that becomes the set temperature or more and the set current value, and a display device that displays each data of the measurement time, the measured temperature, and the measured current value, or 8. The power system and electrical equipment monitoring device according to claim 7, further comprising at least one of storage devices for storing data.