Remote monitoring system for electrical facility, remote monitoring method for electrical facility, and remote monitoring program for electrical facility

Abstract

To provide a remote monitoring system for an electrical facility capable of monitoring not only cubicles but also SOG facilities.SOLUTION: A remote monitoring system for an electrical facility comprises an SOG facility, a cubicle, and an output device. The SOG facility comprises an SOG control device, an abnormality detection unit for SOG connected to an SOG power supply current detection sensor, and a multi-contact information acquisition and transmission unit for SOG. The cubicle comprises a power supply unit, an insulation monitoring unit, an abnormality detection unit for the cubicle connected to a main circuit breaker operation detection vibration sensor, and a multi-contact information acquisition and transmission unit for the cubicle. The multi-contact information acquisition and transmission unit for SOG transmits a signal obtained by the abnormality detection unit for SOG to the multi-contact information acquisition and transmission unit for the cubicle. The multi-contact information acquisition and transmission unit for the cubicle transmits information created from a signal obtained by the abnormality detection unit for SOG and / or the abnormality detection unit for the cubicle to the output device. The output device outputs each information obtained from the SOG facility and the cubicle.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a remote monitoring system for electrical equipment of home electric tools, a method for remotely monitoring electrical equipment, and a program for remotely monitoring electrical equipment.

Background Art

[0002] An insulation monitoring device, which is a type of ground fault protection device, is shown as a device capable of accurately monitoring the insulation state of a low-voltage circuit in the operation guidelines of the chief engineer system (Ministry of Economy, Trade and Industry website, https: / / www.meti.go.jp / policy / safety_security / industrial_safety / oshirase / 2017 / 08 / 290824.html), and has been introduced since around 1984. Initially, it was a wired type but has changed to a wireless type, and currently, remote monitoring devices that mainly distribute alarm emails via 4G communication (Long Term Evolution, LTE) are installed in many electrical equipment. In recent years, when installing home electric tools, insulation monitoring devices are actively installed to prevent leakage accidents and detect signs of them. By installing them, institutional benefits can also be obtained, and in the relaxation measures from monthly inspections to bi-monthly inspections in monthly inspections and the reduction measures for the number of entrusted inspections by external entrustment, electrical management technicians, who are electrical chief engineers responsible for security management work, can manage more equipment.

[0003] So far, a remote monitoring system for electrical equipment has been proposed in which an abnormality report is sent from an insulation monitoring system of a power receiving facility in a cubicle to a monitoring center via a network, and then a notice is given to a maintenance worker or the like. For example, information necessary in response to the occurrence and recovery of an abnormality occurring in electrical equipment is notified to a monitoring computer, stored in a database of the monitoring computer connected via a public line to each terminal device, and information regarding the history of the occurrence and recovery of abnormalities in each electrical equipment during a predetermined period is notified (Patent Document 1); an electrical equipment monitoring system (Patent Document 2) that controls the generated power of a self-generation device so that the generated power does not exceed the used power by a monitoring device that transmits the used power information and the generated power information to a cloud server; and an electrical equipment inspection system (Patent Document 3) that includes a sensor capable of detecting a monitoring element of electrical equipment and collates the monitoring element with an abnormal pattern, and determines that there is an abnormality in the electrical equipment when the abnormal pattern is included in the monitoring element.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the conventional remote monitoring device for electrical equipment, the accident monitoring items for insulation monitoring are limited to power outages and leakage currents in the cubicle. Therefore, when a power outage failure occurs, it is difficult to determine whether the cause is an internal or external problem in the cubicle, and the severity of the accident is also unknown. As a result, on-site confirmation is essential. For this reason, it also takes time to restore the surrounding area including the operator due to a spreading accident such as a power outage accident, and the burden on electrical management engineers has increased. In addition, the initial cost of installing equipment and the running cost such as communication of the conventional remote monitoring device are also high.

[0006] The present invention has been made in view of such problems, and an object thereof is to provide a remote monitoring system for electrical equipment, a remote monitoring method for electrical equipment, and a remote monitoring program for electrical equipment, which have high reliability for abnormal information that solves the above problems and reduce costs.

Means for Solving the Problems

[0007] The inventor constructed a monitoring system that can collect abnormal information such as failures of both the SOG equipment and the cubicle, including not only power outages and leakage currents in the cubicle but also information detected by the SOG equipment. Then, when grasping a power outage accident or the like, important information is scrutinized to package useful failure information, and an invention of a remote monitoring system for electrical equipment, a remote monitoring method for electrical equipment, and a remote monitoring program for electrical equipment that can determine the severity of the accident including the distinction between whether the cause is inside or outside the premises has been achieved.

[0008] Therefore, the present invention has the following configuration. The remote monitoring system for electrical equipment according to the present invention is a remote monitoring system for electrical equipment including SOG equipment, cubicles, and output devices. The SOG equipment includes an SOG control device, an abnormality detection unit for SOG connected to an SOG power current detection sensor, and a multi-contact information acquisition and transmission unit for SOG. The cubicle includes a power supply unit, an insulation monitoring unit, an abnormality detection unit for cubicles connected to a main breaker operation detection vibration sensor, and a multi-contact information acquisition and transmission unit for cubicles. The multi-contact information acquisition and transmission unit for SOG transmits the signal obtained by the abnormality detection unit for SOG to the multi-contact information acquisition and transmission unit for cubicles. The multi-contact information acquisition and transmission unit for cubicles transmits the information created from the signals obtained by the abnormality detection unit for SOG and / or the abnormality detection unit for cubicles to the output device. The output device is characterized by outputting information on power outage, SOG power loss, SOG ground fault, SOG overcurrent, SOG control, main breaker operation, leakage of low-voltage power circuit, and leakage of low-voltage lighting circuit obtained from the SOG equipment and the cubicles. Further, the abnormality detection unit for cubicles is characterized by being connected to a control unit and a storage unit. Further, the multi-contact information acquisition and transmission unit for cubicles is characterized by being connected to a control unit and a storage unit. Further, it is characterized by detecting and determining abnormalities in the SOG equipment and / or the cubicles, and outputting abnormality information by the output device. Further, it is characterized by checking the soundness of the remote monitoring system for electrical equipment at a predetermined time. Further, the predetermined time is characterized by being arbitrarily changeable. Further, the predetermined time is characterized by being every fixed time. Further, the fixed time is characterized by being any one of 6 hours, 12 hours, 24 hours, 2 days, 3 days, 1 week, and 1 month. Further, it is characterized by representing whether each piece of information is abnormal or normal as binary information. Further, the abnormality detection unit for SOG and the multi-contact information acquisition and transmission unit for SOG are characterized by being provided in the SOG control device. Further, the sizes of the abnormality detection unit for the SOG and the multi-contact information acquisition and transmission unit for the SOG are characterized in that the vertical, horizontal and height are within 40 mm × 130 mm × 25 mm. Further, the multi-contact information acquisition and transmission unit for the cubicle and the output device are characterized in that they perform wireless communication. Further, the multi-contact information acquisition and transmission unit for the cubicle and the output device are characterized in that they perform wireless communication using SIGFOX (registered trademark). Further, the multi-contact information acquisition and transmission unit for the SOG and the multi-contact information acquisition and transmission unit for the cubicle are characterized in that they perform wireless communication. Further, the multi-contact information acquisition and transmission unit for the SOG and the multi-contact information acquisition and transmission unit for the cubicle are characterized in that they perform wireless communication using Wi-Fi (registered trademark) and / or ESP-NOW. Further, the abnormality detection unit for the SOG and the multi-contact information acquisition and transmission unit for the SOG are characterized in that they are equipped with a battery. Further, the abnormality detection unit for the cubicle and the multi-contact information acquisition and transmission unit for the cubicle are characterized in that they are equipped with a backup battery. The remote monitoring method of electrical equipment according to the present invention is a remote monitoring method of electrical equipment using a remote monitoring system of electrical equipment including an SOG equipment, a cubicle, and an output device. The SOG equipment includes an SOG control device, an abnormality detection unit for SOG connected to an SOG power current detection sensor, and a multi-contact information acquisition and transmission unit for SOG. The cubicle includes a power supply unit, an insulation monitoring unit, an abnormality detection unit for the cubicle connected to a main breaker operation detection vibration sensor, and a multi-contact information acquisition and transmission unit for the cubicle. The multi-contact information acquisition and transmission unit for SOG transmits the signal obtained by the abnormality detection unit for SOG to the multi-contact information acquisition and transmission unit for the cubicle. The multi-contact information acquisition and transmission unit for the cubicle transmits the information created from the signals obtained by the abnormality detection unit for SOG and / or the abnormality detection unit for the cubicle to the output device. The output device includes a step of outputting each information of power failure, SOG power loss, SOG ground fault, SOG overcurrent, SOG control, main breaker operation, leakage of low-voltage power circuit, and leakage of low-voltage lighting circuit obtained from the SOG equipment and the cubicle. The remote monitoring program of electrical equipment according to the present invention is a remote monitoring program of electrical equipment of a remote monitoring system of electrical equipment including an SOG equipment, a cubicle, and an output device. The SOG equipment includes an SOG control device, an abnormality detection unit for SOG connected to an SOG power current detection sensor, and a multi-contact information acquisition and transmission unit for SOG. The cubicle includes a power supply unit, an insulation monitoring unit, an abnormality detection unit for the cubicle connected to a main breaker operation detection vibration sensor, and a multi-contact information acquisition and transmission unit for the cubicle. The multi-contact information acquisition and transmission unit for SOG transmits the signal obtained by the abnormality detection unit for SOG to the multi-contact information acquisition and transmission unit for the cubicle. The multi-contact information acquisition and transmission unit for the cubicle transmits the information created from the signals obtained by the abnormality detection unit for SOG and / or the abnormality detection unit for the cubicle to the output device. The output device causes a computer to execute a step of outputting each information of power failure, SOG power loss, SOG ground fault, SOG overcurrent, SOG control, main breaker operation, leakage of low-voltage power circuit, and leakage of low-voltage lighting circuit obtained from the SOG equipment and the cubicle.

Effects of the Invention

[0009] By using the remote monitoring system for electrical equipment, the remote monitoring method for electrical equipment, and the remote monitoring program for electrical equipment of the present invention, it becomes possible to constantly monitor the abnormalities of SOG equipment and cubicles, and comprehensively grasp the accident situations such as power outages and electric leaks. Therefore, it is possible to judge the urgency of an accident. This leads to early accident recovery including initial response, and also leads to an improvement in the peace of mind and reliability for customers. In particular, the monitoring of the power loss of the SOG control device is an idea without precedent in the past, and it is possible to detect human errors due to malfunctions of the SOG control device or the oversight of switch activation by security operators, so it is possible to prevent a major failure such as a cascading accident.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be specifically described. However, the present invention is not limited to the following embodiments, and various modifications can be made within the scope of the gist thereof. Also, it goes without saying that the examples given are not limited to those examples, and can be arbitrarily changed without departing from the gist of the present invention.

[0012] The overall configuration of the remote monitoring system 1 for electrical equipment according to the present invention is shown in FIG. 1. The SOG equipment 2 is a set of equipment that performs overcurrent trip and ground fault trip operation (SOG), and has a multi-contact information acquisition and transmission unit 22 for SOG connected to an abnormality detection unit 21 for SOG. The abnormality detection unit 21 for SOG is connected to a SOG control device 24 equipped with a PAS 23 and a SOG power current detection sensor 25. The cubicle 3 has a multi-contact information acquisition and transmission unit 32 for cubicles connected to an abnormality detection unit 31 for cubicles. The abnormality detection unit 31 for cubicles is connected to a power supply unit 33, an insulation monitoring unit 35 equipped with a leakage detection sensor 34, and a main breaker operation detection vibration sensor 36. Further, the abnormality detection unit 31 for cubicles and the multi-contact information acquisition and transmission unit 32 for cubicles are connected to a control unit 37 that performs calculations using a control program or the like and a storage unit 38 that stores data and the like. The multi-contact information acquisition and transmission unit 22 for SOG is connected to the multi-contact information acquisition and transmission unit 32 for cubicles via a network 5. The multi-contact information acquisition and transmission unit 32 for cubicles is connected to an external output device 4 via a network 6.

[0013] In the remote monitoring system 1 for electrical equipment according to the present invention, the control for detecting and determining abnormalities in the SOG equipment 2 and / or the cubicle 3 is shown in FIG. 2. The dotted lines respectively represent the processes performed at MID-s11 and the processes performed at MID-c12.

[0014] When an abnormality is detected in the SOG equipment 2, abnormality information is output through the steps of step S101 to step S107 below.

[0015] Step S101: Detecting an abnormality with SOG devices and sensors Using devices and sensors such as the SOG control device 24 equipped with a PAS 23 and the SOG power current detection sensor 25 installed in the SOG equipment 2, abnormalities such as a short circuit, a ground fault, and a power outage are detected. The abnormality may be detected by one device or sensor, or may be detected by a plurality of devices or sensors.

[0016] Step S102: Acquiring a signal with the abnormality detection unit for SOG The abnormality detection unit 21 for SOG of the SOG device 2 is always in a standby state and is connected to devices and sensors such as the SOG control device 24 connected to the PAS 23 and the SOG power supply current detection sensor 25. In step S101, when an abnormality is detected by these devices and sensors, a signal is immediately sent to the abnormality detection unit 21 for SOG, and the connected abnormality detection unit 21 for SOG acquires the signal.

[0017] Step S103: Acquire and transmit a signal by the multi-contact information acquisition and transmission unit for SOG The signal obtained by the abnormality detection unit 21 for SOG in step S102 is acquired by the connected multi-contact information acquisition and transmission unit 22 for SOG. Next, this signal is transmitted from the multi-contact information acquisition and transmission unit 22 for SOG to the multi-contact information acquisition and transmission unit 32 for cubicle via the network 5. Although the transmission is performed immediately, there may be a control time lag on the order of milliseconds.

[0018] Step S104: Acquire a signal by the multi-contact information acquisition and transmission unit for cubicle The signal transmitted from the multi-contact information acquisition and transmission unit 22 for SOG in step S103 is acquired by the multi-contact information acquisition and transmission unit 32 for cubicle installed in the cubicle 3.

[0019] Step S105: Create abnormality information on accidents, failures, and electric leakage When a signal is obtained by the multi-contact information acquisition and transmission unit 32 for cubicles in step S104, the control unit 37 connected to the multi-contact information acquisition and transmission unit 32 for cubicles creates abnormal information on accidents, failures, and leakage from the signal. The abnormal information is composed of at least information on power failure, loss of SOG power supply, SOG ground fault, SOG overcurrent, SOG control, main circuit breaker operation, leakage in the low-voltage power circuit, and leakage in the low-voltage lighting circuit, indicating that one or more pieces of information are abnormal. For each of these pieces of information, a determination is made as to whether it is abnormal or normal, and the abnormal is indicated as on (1) and the normal as off (0) contact information. For the loss of SOG power supply, a threshold value is set, and when the current of the SOG power supply falls below the threshold value, it is determined as a power supply loss. Since the normal state of the threshold value is 10 to 20 mA, it is set with a current value below that. For example, the threshold value is set to 5 mA, but the current value can be arbitrarily set as long as it is a threshold value at which a power supply loss can be determined.

[0020] Regarding each piece of information on power failure, loss of SOG power supply, SOG ground fault, SOG overcurrent, SOG control, main circuit breaker operation, leakage in the low-voltage power circuit, and leakage in the low-voltage lighting circuit, it may be recorded in the storage unit 38 until a determination is made as to whether all are abnormal or normal. Also, when all the pieces of information are complete, it may be converted into information for which a determination of abnormal or normal has been made by the control unit 37.

[0021] Step S106: Acquire and transmit abnormal information by the multi-contact information acquisition and transmission unit for cubicles The abnormal information created in step S105 is transmitted from the multi-contact information acquisition and transmission unit 32 for cubicles.

[0022] Step S107: Output abnormal information by the output device The abnormal information transmitted from the multi-contact information acquisition and transmission unit 32 for cubicles in step S106 is acquired and output by the external output device 4 via the network 6. Although the output of the transmitted abnormal information is performed immediately, there may be a communication time lag of about several minutes.

[0023] When an abnormality is detected in the cubicle 3, the abnormal information is output through the processes of the following steps S111 to S115.

[0024] Step S111: Detecting an abnormality using equipment and sensors for the cubicle Using equipment and sensors such as the power supply unit 33 installed in the cubicle 3, the insulation monitoring unit 35 equipped with a leakage detection sensor 34, and the main breaker operation detection vibration sensor 36, abnormalities such as short circuits, ground faults, and power outages are detected. The abnormality may be detected by one piece of equipment or sensor, or may be detected by a plurality of pieces of equipment or sensors.

[0025] Step S112: Acquiring a signal with the abnormality detection unit for the cubicle The abnormality detection unit 31 for the cubicle 3 of the cubicle 3 is always in a standby state and is connected to equipment and sensors such as the power supply unit 33, the insulation monitoring unit 35 connected to the leakage detection sensor 34, and the main breaker operation detection vibration sensor 36. In step S111, when an abnormality is detected by these pieces of equipment or sensors, a signal is immediately sent to the abnormality detection unit 31 for the cubicle, and the connected abnormality detection unit 31 for the cubicle acquires the signal.

[0026] Step S113: Creating abnormality information on accidents, failures, and leakage When a signal is obtained by the abnormality detection unit 31 for the cubicle in step S112, the control unit 37 connected to the abnormality detection unit 31 for the cubicle creates abnormality information on accidents, failures, and leakage. The abnormality information is the same as the content shown in step S105 above.

[0027] Step S114: Acquiring and transmitting the abnormality information with the multi-contact information acquisition and transmission unit for the cubicle The abnormality information created in step S113 is transmitted from the multi-contact information acquisition and transmission unit 32 for the cubicle. Step S114 is the same as the content shown in step S106 above.

[0028] Step S115: Outputting the abnormality information with the output device The abnormal information transmitted from the multi-contact information acquisition and transmission unit 32 for the cubicle in step S114 is acquired and output by an external output device 4 via the network 6. Step S115 is the same as the content shown in the above step S107.

[0029] When abnormalities are detected in both the SOG facility 2 and the cubicle 3, the steps of step S101 to step S104 and step S111 to step S112 are performed as described above. In the subsequent steps of step S105 and step S113, step S106 and step S114, and step S107 and step S115, they are performed simultaneously, and abnormal information is output. When creating abnormal information on accidents, faults, and electric leakage in step S105 and step 113, for each piece of information on power outage, SOG power loss, SOG ground fault, SOG overcurrent, SOG control, main circuit breaker operation, electric leakage in the low-voltage power circuit, and electric leakage in the low-voltage lighting circuit, abnormal information from both the SOG facility 2 and the cubicle 3 may be collected and recorded in the storage unit 38.

[0030] Regarding the above steps S101 to step S107 and step S111 to S115, ultimately, as long as the abnormal information of the SOG facility 2 and / or the cubicle 3 can be acquired by the multi-contact information acquisition and transmission unit 32 for the cubicle and output by the output device 4, the acquisition order of signals acquired and transmitted by each multi-contact information acquisition and transmission unit 22 for SOG and the multi-contact information acquisition and transmission unit 32 for the cubicle can be swapped. The acquisition order of the signals detected by the SOG abnormal detection unit 21 for the SOG facility 2 and the cubicle abnormal detection unit 31 for the cubicle 3 can also be swapped.

[0031] In the abnormality detection unit 21 for SOG and the abnormality detection unit 31 for cubicles, signals are obtained from devices and sensors that are always connected. However, for example, after the abnormality information of the SOG facility 2 is detected, the information is transmitted from the multi-contact information acquisition and transmission unit 22 for SOG to the multi-contact information acquisition and transmission unit 32 for cubicles, and from the multi-contact information acquisition and transmission unit 32 for cubicles, via the abnormality detection unit 31 for cubicles, it is connected to the power supply unit 33, the insulation monitoring unit 35, and the main disconnector operation detection vibration sensor 36 to obtain signals, which may be converted into abnormality information by the control unit 37.

[0032] Also, for example, after the abnormality information of the cubicle 3 is detected, the information is transmitted from the multi-contact information acquisition and transmission unit 32 for cubicles to the multi-contact information acquisition and transmission unit 22 for SOG, and from the multi-contact information acquisition and transmission unit 22 for SOG, it is connected to the abnormality detection unit 21 for SOG to obtain signals, and then the signal is transmitted again from the multi-contact information acquisition and transmission unit 22 for SOG to the multi-contact information acquisition and transmission unit 32 for cubicles, which may be converted into abnormality information by the control unit 37.

[0033] Next, in the remote monitoring system 1 of the electrical equipment of the present invention, the control when determining the soundness of the system at a predetermined time is shown in FIG. 3. When confirming the soundness of the remote monitoring system 1 of the electrical equipment, normal information is output by the following steps S201 to S204.

[0034] Step S201: Count the timer for the predetermined time In the abnormality detection unit 21 for SOG of the SOG facility 2 and the abnormality detection unit 31 for cubicles of the cubicle 3, they are always in a standby state and no signals are obtained. On the other hand, in the multi-contact information acquisition and transmission unit 32 for cubicles of MID-c12, timer count setting is performed. The predetermined time may be every fixed time or at the set time. When setting a fixed time, any time such as 6 hours, 12 hours, 24 hours, 2 days, 3 days, 1 week, 1 month, etc. can be set, but preferably 24 hours. The timer count setting may be recorded in the connected storage unit 38 and the timer count information may be obtained from the control unit 37.

[0035] Step S202: Create normal information for checking system soundness When a predetermined time elapses in Step S201, the control unit 37 connected to the multi-contact information acquisition and transmission unit 32 for the cubicle creates normal information. By creating the normal information, the remote monitoring system 1 of the electrical equipment that detects and determines abnormalities in the SOG equipment 2 and / or the cubicle 3 self-diagnoses whether it is operating normally. The normal information is composed of at least information on power outage, SOG power loss, SOG ground fault, SOG overcurrent, SOG control, main circuit breaker operation, leakage of the low-voltage power circuit, and leakage of the low-voltage lighting circuit, and each makes a normal determination. Thereby, it is possible to avoid a state where the system is not normal, such as power loss in MID-s11 or MID-c12, and runaway of the program used for control. Also, each of these pieces of information may be recorded in the storage unit 38.

[0036] Step S203: Transmit normal information from the multi-contact information acquisition and transmission unit for the cubicle The normal information of the SOG equipment 2 and the cubicle 3 created in Step S202 is transmitted from the multi-contact information acquisition and transmission unit 32 for the cubicle.

[0037] Step S204: Output normal information with the output device The normal information transmitted from the multi-contact information acquisition and transmission unit 32 for the cubicle in Step S203 is acquired by an external output device 4 via the network 6. Although the output of the transmitted normal information is performed immediately, there may be a communication time lag of about several minutes. If the normal information for checking the system soundness is not output within a predetermined time, on-site confirmation by an electrical management engineer is required to check for abnormalities in the remote monitoring system 1 of the electrical equipment.

[0038] The remote monitoring system 1 of the electrical equipment of the present invention targets private electrical installations, and can be applied in any form as long as it is electrical equipment that requires remote monitoring such as power outages and electric leaks. Private electrical installations are defined in Article 38 of the Electricity Business Act of Japan as electrical installations other than those used for the electricity business and general-purpose electrical installations, and refer to electrical equipment that receives power at high voltage or extra-high voltage, power generation equipment other than small output, etc. It mainly refers to business sites such as factories, office buildings, schools, hospitals, hotels, sports facilities, entertainment facilities, farms, coal mines, etc., and also includes those with power lines leading to electrical installations located outside the premises.

[0039] An example of supplying power to the electrical equipment of private electrical installations is shown in Fig. 4. An electric wire is drawn into the premises from a branch switch installed on a distribution pole, which is an electric power company facility, and is transmitted through a lead-in cable installed on an in-premises pole installed in the customer's premises after the liability demarcation point, which is a high-voltage power receiving and transforming facility, and is changed to a low voltage inside the cubicle. Further, electricity is supplied to the in-premises equipment where the breaker is arranged. The voltage supplied by the power company is 6,600V, while in the cubicle, it is converted to a voltage of 200V or 100V and used as a 200V power source for power or a 100V power source for lighting through a distribution board in factories and stores. An SOG control device is installed on the in-premises pole to prevent a spreading accident when a short circuit or ground fault occurs in the electrical equipment of the location that receives power supply from a power plant or substation through the opening of a high-voltage outdoor switch (PAS). A spreading accident means that due to an electrical equipment accident at the location itself, the power supply of the power plant or substation stops or other customers experience a power outage. It goes without saying that the shape, arrangement, voltage, name of the device, etc. of the structures shown in Fig. 4 are examples and can be appropriately changed according to their use and function.

[0040] The SOG of the SOG device 2 refers to Storage Over current Ground, and it performs an overcurrent trip and ground fault trip operation. The operation of SOG includes SO operation and G operation. The SO operation is an overcurrent trip operation. It trips after the distribution line becomes de-energized to provide protection against overload or short-circuit current. The G operation is a ground fault trip operation, representing the protection function against ground faults. When a ground fault and an overcurrent (short circuit) occur simultaneously, the SO operation is performed preferentially.

[0041] Figure 1 shows the minimum necessary configuration of the remote monitoring system 1 of the electrical equipment of the present invention, but various devices and sensors necessary for protection against short circuits and ground faults can be installed. For example, it is equipped with an insulation monitoring unit and has a structure protected by a plastic box or the like. Also, devices, sensors, etc. can be used whether they are off-the-shelf products or self-made products. Devices, sensors, etc. may be configured to be detachable due to updates or failures. These devices, sensors, etc. may each be composed of independent integrated circuits, microprocessors, firmware, etc. For example, they may be provided with a control unit for converting signals obtained respectively, a storage unit for recording information such as signals obtained and information converted by the obtained signals and the control unit, an input unit for inputting information, an output unit for outputting the obtained information, etc.

[0042] The SOG device 2 is a type of high-voltage equipment in the customer's premises after the Pole mounted Air insulated Switch (PAS), which is a type of switch. When a short circuit or ground fault occurs in the high-voltage equipment in the customer's premises, the PAS 23 is opened and interrupted to prevent a cascading accident. That is, in the SOG device 2, the SOG control device 24 controls the PAS 23. In the case of a ground fault accident, the SOG control device 24 operates without power interruption of the distribution line and opens the PAS 23. In the case of an overcurrent (short circuit) accident, at the same time as the high-voltage circuit is de-energized, the PAS 23 is opened by the SO operation of the SOG control device 24 to disconnect the accident point. When a ground fault and an overcurrent (short circuit) accident overlap, the SO operation takes precedence and operates during an overcurrent accident. The SOG power current detection sensor 25 monitors the presence or absence of power supply to the SOG control device 24 in order to prevent a cascading accident by preventing the SOG function from working when the power supply is lost. Since the SOG control device 24 is installed outdoors, it is installed in a box made of resin or stainless steel. The SOG control device 24 is connected to the abnormality detection unit 21 for SOG, and commercially available devices can be used.

[0043] The PAS 23 is an electrical equipment that installs a utility pole in the customer's premises and conducts high-voltage power reception. It is a type of switch installed on the upper part of the utility pole. It is a device that detects the ground fault current and short circuit generated in the electrical equipment and automatically opens the circuit to minimize the cascading accident that affects other customers. The PAS 23 can also be replaced with devices such as the Underground Gas Switch (UGS) for the neutral line.

[0044] The abnormality detection unit 21 for SOG and the multi-contact information acquisition and transmission unit 22 for SOG are integrally configured in the form of MID-s11 (Multi Information Detection device - SOG) indicated by a dotted line. However, the abnormality detection unit 21 for SOG and the multi-contact information acquisition and transmission unit 22 for SOG can also be provided separately. MID-s11 has a battery as the main power source, waits in a sleep state to minimize battery consumption, and enters a resume state (start-up state) when the abnormality detection unit 21 for SOG receives a signal. The abnormality detection unit 21 for SOG is connected to the SOG control device 24 and the SOG power supply current detection sensor 25, acquires the obtained signal, and transmits it from the multi-contact information acquisition and transmission unit 22 for SOG to the multi-contact information acquisition and transmission unit 32 for the cubicle. The connection between the SOG control device 24 and the SOG power supply current detection sensor 25 and the multi-contact information acquisition and transmission unit 22 for SOG may be wired, wireless, or a hybrid form of them. Also, if there is a connection to the multi-contact information acquisition and transmission unit 22 for SOG, it may be connected via separately provided devices or the like.

[0045] The abnormality detection unit 21 for SOG and the multi-contact information acquisition and transmission unit 22 for SOG are preferably sized to fit within the box where the SOG control device 24 is installed. Even when the installation space is small, it can be installed by making the device more compact. The size is, for example, within 40mm × 130mm × 25mm in terms of length, width, and height. By having such a size, it is possible to accommodate it within a commercially available SOG control device 24. This enables the realization of cost reduction and compactification for installation within the SOG control device, which was difficult in the past.

[0046] The cubicle 3 is a cubicle type high-voltage power receiving facility, and is a set of devices that convert a high voltage into a voltage that can be used in the facility. The power supply unit 33 of the cubicle 3 is an outlet inside the cubicle 3 and detects a power outage. In FIG. 1, the minimum necessary configuration of the remote monitoring system 1 of the electrical equipment of the present invention is shown, but if necessary for safely converting the voltage, a plurality of devices, sensors, etc. can be installed. The devices, sensors, etc. to be installed include, for example, transformers, measuring transformers, circuit breakers, VCTs, vacuum circuit breakers, current transformers, high-voltage shunt capacitors, series reactors, high-voltage AC load switches, ammeters, voltmeters, wiring circuit breakers, protection devices, etc., and are structured to be protected by a roof and a base such as a copper plate bottom plate. The devices, sensors, etc. may also be configured to be detachable due to updates or failures. These devices, sensors, etc. may each be composed of an independent integrated circuit, microprocessor, firmware, etc., and for example, a control unit for converting signals, etc. obtained for each, a storage unit for recording information such as signals obtained and information converted by the control unit, an input unit for inputting information, an output unit for outputting obtained abnormal information and / or normal information, etc. may be provided.

[0047] The insulation monitoring unit 35 is connected to a leakage current detection sensor 34 etc., constantly monitors the leakage current in the low-voltage circuit, and outputs an alarm when the set current is exceeded. The insulation monitoring unit 35 monitors the leakage current by multi-purpose contact input. The insulation monitoring unit 35 is connected to the abnormality detection unit 31 for the cubicle, and commercially available devices can be used. The connected devices, sensors, etc. correspond to the devices, sensors, etc. installed in the above cubicle 3.

[0048] The main circuit breaker operation detection vibration sensor 36 detects the operation vibration of the main circuit breaker that shuts off the circuit, and detects that the main circuit breaker has operated. As the main circuit breaker, in addition to a vacuum circuit breaker (VCB), a high-voltage AC load switch (LBS), etc. can also be used, and when detecting an abnormality such as a short circuit or a ground fault, it opens the circuit.

[0049] The abnormality detection unit 31 for cubicles, the multi-contact information acquisition and transmission unit 32 for cubicles, the control unit 37, and the storage unit 38 are integrally configured in the form of MID-c12 (Multi Information Detection device-cubicle) indicated by a dotted line. However, the abnormality detection unit 31 for cubicles, the multi-contact information acquisition and transmission unit 32 for cubicles, the control unit 37, and the storage unit 38 can also be provided separately. MID-c12 can obtain commercial power from cubicle 3. A backup battery (cell) may be installed so that the function can be maintained even during a power outage.

[0050] The multi-contact information acquisition and transmission unit 32 for cubicles is installed inside cubicle 3 and acquires signals of the entire electrical equipment including the SOG equipment 2. The abnormality detection unit 31 for cubicles is connected to the power supply unit 33, the insulation monitoring unit 35 equipped with a leakage detection sensor 34, and the main breaker operation detection vibration sensor 36 to acquire the obtained signals. The information obtained from the multi-contact information acquisition and transmission unit 22 for SOG and / or the information obtained from the abnormality detection unit 31 for cubicles is transmitted from the multi-contact information acquisition and transmission unit 32 for cubicles to the external output device 4. The connection between the power supply unit 33, the insulation monitoring unit 35, the main breaker operation detection vibration sensor 36, and the abnormality detection unit 31 for cubicles may be wired, wireless, or a hybrid form thereof. Also, if there is a connection to the multi-contact information acquisition and transmission unit 32 for cubicles, it may be connected via separately provided devices or the like. The multi-contact information acquisition and transmission unit 32 for cubicles may have separate configurations when acquiring signals from the multi-contact information acquisition and transmission unit 22 for SOG and when acquiring abnormal information and / or normal information of accidents, faults, and leakage and transmitting it to the external output device 4.

[0051] The control unit 37 receives the signals acquired by the multi-contact information acquisition and transmission unit 32 for cubicles and converts them into abnormal information and / or normal information through arithmetic processing using a control program. The arithmetic processing is performed by the CPU included in the control unit 37. This CPU includes functional modules for controlling connected devices, sensors, etc. and can also perform various controls.

[0052] In the control unit 37, from the obtained signals and the like, as remote monitoring items, information processing of power outage, loss of SOG power supply, SOG ground fault, SOG overcurrent, SOG control, main breaker operation, leakage current in the low-voltage power circuit, and leakage current in the low-voltage lighting circuit is performed, and a determination is made as to whether each piece of information is abnormal or normal. Depending on the models of the SOG equipment 2 and the cubicle 3, the information obtained may be different. For the power outage, power outage monitoring of the power supply equipment is performed. For the loss of SOG power supply, power supply monitoring of the SOG control device is performed to prevent a cascading accident due to the inoperability of the SOG control. For the SOG ground fault, ground fault accident monitoring is performed to prevent a delay in power restoration because the cause of the accident is unknown and on-site investigation is required. For the SOG overcurrent, short-circuit accident monitoring is performed to prevent a delay in power restoration because the cause of the accident is unknown and on-site investigation is required. For the SOG control, abnormal monitoring of the SOG control device is performed to prevent a cascading accident because there is a risk of inoperability or malfunction of the SOG control. For the main breaker operation, to prevent a delay in power restoration because the cause of the accident is unknown and on-site investigation is required, short-circuit accident monitoring inside the cubicle 3 is performed by the operation of the VCB (vacuum circuit breaker) and LBS (high-voltage AC load switch). For the leakage current in the low-voltage power circuit, leakage accident monitoring of the three-phase circuit is performed. For the leakage current in the low-voltage lighting circuit, leakage accident monitoring of the single-phase circuit is performed.

[0053] On the other hand, in the present invention, temperature monitoring of the transformer is not included in the conventionally performed remote monitoring items, and cost reduction is achieved by simplifying the amount of information. The temperature rise of the transformer does not suddenly become an abnormal value, and even if it becomes abnormal, the main breaker operation is performed. Also, circuit enlargement due to having the analog value judged as MID-c12 can be avoided.

[0054] When the control unit 37 converts a signal into abnormal information and / or normal information, for example, the signal itself may be used as abnormal information and / or normal information. In order to communicate with a small data capacity, it is preferable to indicate it with binary information of abnormal or normal.

[0055] The storage unit 38 stores control programs, databases, etc. used in various processes of the information processing apparatus, in addition to the operation processing results and the like performed by the control unit 37. The storage unit 38 includes memory devices such as RAM, ROM, and flash memory. The control program may be installed via a computer-readable recording medium such as a CD-ROM, DVD-ROM, USB memory, or external hard disk, or via the Internet. The control program may be installed in the storage unit 38 using a known setup program or the like.

[0056] The multi-contact information acquisition and transmission unit 22 for SOG and the multi-contact information acquisition and transmission unit 32 for cubicles are connected via the network 5. The connection is made wirelessly, and examples include infrared, BLUETOOTH (registered trademark), Wi-Fi (registered trademark), ESP-NOW, SIGFOX (registered trademark), wireless LAN (Local Area Network), 3G, 4G / LTE (Long Term Evolution), 5G, LoRa, Wi-SUN, etc., such as LPWA (Low Power Wide Area). The connection may directly connect the multi-contact information acquisition and transmission unit 22 for SOG and the multi-contact information acquisition and transmission unit 32 for cubicles, or may be via the Internet or intranet. Preferably, Wi-Fi (registered trademark) and / or ESP-NOW, which minimize the information amount by binarization and have low running costs and low power consumption, are used.

[0057] The output device 4 can be any device as long as it has an output unit such as a mobile phone or a personal computer and can acquire character information. Examples of electrical equipment accidents include power outages, short circuits, ground faults, and leakage. In the remote monitoring system 1 of the electrical equipment of the present invention, information is narrowed down to highly important information and information that can clearly show the severity of the accident is output. That is, in the remote monitoring system 1 of the power equipment of the present invention, if abnormal information is obtained in any of the items of power outage, SOG power loss, SOG ground fault, SOG overcurrent, SOG control, main circuit breaker operation, leakage of low-voltage power circuit, and leakage of low-voltage lighting circuit, on-site confirmation by an electrical management engineer is required.

[0058] Fig. 5 shows an example of a notification email displayed on the output device 4. (a) is an example in a conventional system, where the measured values input from each sensor are displayed. (b) is an example of the output of abnormal information in the system of the present invention. It can be seen that a power outage and SOG overcurrent are displayed as 1, indicating that there is an abnormality. Preferably, the information provided by email is digital binary information such as 0 and 1 in order to simplify and reduce the communication volume. Since SOG ground fault and SOG overcurrent may cause a power outage in the surroundings and lead to a major accident, urgent on-site confirmation is required. (c) is an example of the output of normal information in the system of the present invention. As a normal regular report, normal information is sent regularly, and 255 is displayed in all items. The notification email only needs to display a text message, and examples include email (E-mail), LINE (registered trademark), SMS, etc.

[0059] Also, when outputting, cloud services can be utilized. In this case, information is transmitted from the multi-contact information acquisition and transmission unit 32 for cubicles to a cloud server, and email information is output using a mobile phone or a personal computer as the output device 4. The cloud server can perform operations such as entering the customer name for each communication email, and service improvement can also be expected.

[0060] The multi-contact information acquisition and transmission unit 32 for cubicles and the output device 4 are connected via the network 6. The connection of the network 6 is performed wirelessly, and examples include infrared, BLUETOOTH (registered trademark), Wi-Fi (registered trademark), ESP-NOW, SIGFOX (registered trademark), low-power wide-area (LPWA) such as wireless LAN, 3G, 4G / LTE (Long Term Evolution), 5G, LoRa, and Wi-SUN. The connection may directly connect the multi-contact information acquisition and transmission unit 22 for SOG and the multi-contact information acquisition and transmission unit 32 for cubicles, or may be via the Internet or an intranet.

[0061] The connection between the multi-contact information acquisition and transmission unit 32 for the cubicle and the output device 4 is minimized by binarizing the amount of information, and preferably SIGFOX (registered trademark) can be used in consideration of the initial introduction cost, running cost, and power consumption. In particular, regarding the running cost, it can be significantly reduced by changing the communication method from LTE to SIGFOX (registered trademark). Specifically, the LTE communication fee for one conventional insulation monitoring device is estimated to be about 8,000 yen per year. Assuming that the average number of customers of a management engineer is 40, the total annual communication fee reaches about 320,000 yen, and about 3.2 million yen in 10 years. By using SIGFOX (registered trademark), it can be reduced to about 1,200 yen per year per device, and about 480,000 yen in 10 years.

[0062] The remote monitoring system 1 of the electrical equipment of the present invention can grasp the abnormalities of both the SOG equipment 2 and the cubicle 3, so it can determine the general location and importance where an abnormality is detected. Specifically, a power outage indicates that there has been a power outage, regardless of whether it is inside or outside the building. The loss of SOG power or SOG control is not a direct accident, but it indicates that in the event of an accident, the SOG function does not work, leading to a major accident such as a power outage spreading outside the building. Although there is protection to prevent the SOG ground fault / short circuit from spreading outside the building, in some cases, it indicates the possibility of an accident spreading outside the building. The operation of the main circuit breaker basically indicates an accident inside the building. The leakage of the low-voltage power circuit / low-voltage lighting circuit indicates an accident inside the building.

[0063] By using the remote monitoring system 1 for electrical equipment of the present invention, for example, regarding power outages, short circuits, ground faults, leakage, etc., due to accidents occurring in electrical equipment such as cascading failures, power transmission automatically stops at the substation of the power company, and relatively large accidents that also affect adjacent buildings, factories, houses, etc. can be prevented, or even if an accident occurs, measures such as promptly dispatching electrical management technicians to the site can be taken to prevent it from becoming a major incident as much as possible. Also, for example, regarding natural disasters such as lack of maintenance due to aging of equipment, lightning strikes, and rainwater intrusion, negligence of workers such as damage to power cables during excavation work or renovation work, and causes such as contact with birds and animals or intrusion of small animals, by identifying the location where an abnormal signal is detected, countermeasures can also be taken efficiently.

Industrial Applicability

[0064] The remote monitoring system for electrical equipment of the present invention can understand the severity of an accident including whether the cause is inside or outside the premises when grasping power outage accidents, etc., and can achieve labor savings in the security of electrical equipment. In the electrical equipment security business, there are concerns about a future shortage of manpower, and smart security has been proposed and promoted by the entire country including the Ministry of Economy, Trade and Industry, and it is in line with that concept. Also, the remote monitoring system for electrical equipment of the present invention is excellent in running costs and can be used as a general-purpose system for businesses having their own electrical works. It is also beneficial for customers in terms of early identification of the cause of an accident, early accident recovery, and resumption of business.

Claims

1. A remote monitoring system for electrical equipment including an SOG device, a cubicle, and an output device, wherein the SOG device includes an SOG control device, an abnormality detection unit for SOG connected to an SOG power current detection sensor, and a multi-contact information acquisition and transmission unit for SOG, the cubicle includes a power supply unit, an insulation monitoring unit, an abnormality detection unit for the cubicle connected to a main breaker operation detection vibration sensor, and a multi-contact information acquisition and transmission unit for the cubicle, the multi-contact information acquisition and transmission unit for SOG transmits a signal obtained by the abnormality detection unit for SOG to the multi-contact information acquisition and transmission unit for the cubicle, the multi-contact information acquisition and transmission unit for the cubicle transmits information created from signals obtained by the abnormality detection unit for SOG and / or the abnormality detection unit for the cubicle to the output device, the output device outputs information on power outage, SOG power loss, SOG ground fault, SOG overcurrent, SOG control, main breaker operation, leakage current in the low-voltage power circuit, and leakage current in the low-voltage lighting circuit obtained from the SOG device and the cubicle, and is characterized by a remote monitoring system for electrical equipment.

2. The remote monitoring system for electrical equipment according to claim 1, characterized in that an abnormality of the SOG device and / or the cubicle is detected and determined, and abnormality information is output by the output device.

3. The remote monitoring system for electrical equipment according to claim 2, characterized in that the soundness of the remote monitoring system for electrical equipment is confirmed at a predetermined time.

4. The remote monitoring system for electrical equipment according to any one of claims 1 to 3, characterized in that whether each information is abnormal or normal is represented by binary information.

5. The remote monitoring system for electrical equipment according to claim 4, characterized in that the abnormality detection unit for SOG and the multi-contact information acquisition and transmission unit for SOG are provided in the SOG control device.

6. The remote monitoring system for electrical equipment according to claim 5, characterized in that the multi-contact information acquisition and transmission unit for the cubicle and the output device perform wireless communication using SIGFOX (registered trademark).

7. The remote monitoring system for electrical equipment according to claim 6, characterized in that the multi-contact information acquisition and transmission unit for SOG and the multi-contact information acquisition and transmission unit for the cubicle perform wireless communication using Wi-Fi (registered trademark) and / or ESP-NOW.

8. A remote monitoring method for electrical equipment using a remote monitoring system for electrical equipment equipped with an SOG device, a cubicle, and an output device, comprising: The SOG device includes an SOG control device, an SOG abnormality detection unit connected to an SOG power current detection sensor, and an SOG multi-contact information acquisition and transmission unit; The cubicle includes a power supply unit, an insulation monitoring unit, a cubicle abnormality detection unit connected to a main breaker operation detection vibration sensor, and a cubicle multi-contact information acquisition and transmission unit; The SOG multi-contact information acquisition and transmission unit transmits the signal obtained by the SOG abnormality detection unit to the cubicle multi-contact information acquisition and transmission unit; The cubicle multi-contact information acquisition and transmission unit transmits the information created from the signals obtained by the SOG abnormality detection unit and / or the cubicle abnormality detection unit to the output device; The output device outputs information on power outage, SOG power loss, SOG ground fault, SOG overcurrent, SOG control, main breaker operation, leakage of low-voltage power circuit, and leakage of low-voltage lighting circuit obtained from the SOG device and the cubicle. A remote monitoring method for electrical equipment, characterized by including steps.

9. A remote monitoring program for electrical equipment of a remote monitoring system for electrical equipment equipped with an SOG device, a cubicle, and an output device, comprising: The SOG device includes an SOG control device, an SOG abnormality detection unit connected to an SOG power current detection sensor, and an SOG multi-contact information acquisition and transmission unit; The cubicle includes a power supply unit, an insulation monitoring unit, a cubicle abnormality detection unit connected to a main breaker operation detection vibration sensor, and a cubicle multi-contact information acquisition and transmission unit; The SOG multi-contact information acquisition and transmission unit transmits the signal obtained by the SOG abnormality detection unit to the cubicle multi-contact information acquisition and transmission unit; The cubicle multi-contact information acquisition and transmission unit transmits the information created from the signals obtained by the SOG abnormality detection unit and / or the cubicle abnormality detection unit to the output device; The output device causes a computer to execute steps of outputting information on power outage, SOG power loss, SOG ground fault, SOG overcurrent, SOG control, main breaker operation, leakage of low-voltage power circuit, and leakage of low-voltage lighting circuit obtained from the SOG device and the cubicle. A remote monitoring program for electrical equipment, characterized by this.

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