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

Abstract

To provide a remote monitoring system for electrical equipment capable of monitoring not only cubicles but also SOG equipment. [Solution] A remote monitoring system for electrical equipment comprising SOG equipment, a cubicle and an output device, wherein the SOG equipment 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, and the cubicle comprises an abnormality detection unit for cubicle connected to a power supply unit, an insulation monitoring unit, and a main circuit breaker operation detection vibration sensor, and the multi-contact information acquisition and transmission unit for SOG transmits signals obtained by the abnormality detection unit for SOG to the multi-contact information acquisition and transmission unit for cubicle, and the multi-contact information acquisition and transmission unit for cubicle transmits information created from the signals obtained by the abnormality detection unit for SOG and / or the abnormality detection unit for cubicle to the output device, and the output device outputs each piece of information obtained from the SOG equipment and the cubicle.

Description

[Technical field]

[0001] The present invention relates to a remote monitoring system for an electrical facility of a private electrical structure, a remote monitoring method for the electrical facility, and a remote monitoring program for the electrical facility. [Background technology]

[0002] Insulation monitoring devices, a type of earth fault protection device, were indicated in the notice on the operation 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) as a device capable of accurately monitoring the insulation state of low-voltage circuits, and have been introduced since around 1984. Initially, they were wired, but they have since been changed to wireless, and currently, remote monitoring devices that mainly use 4G communication (Long Term Evolution, LTE) to send warning emails are installed in many electrical facilities. In recent years, insulation monitoring devices have been actively installed when installing private electrical facilities to prevent leakage accidents and grasp their signs. The installation of insulation monitoring devices also brings benefits under the system, and the relaxation of monthly inspections from monthly inspections to bimonthly inspections and the outsourcing of reduction measures for the number of contracted points allow electrical management engineers, who are chief electrical engineers who perform safety management work, to manage more facilities.

[0003] Up to now, remote monitoring systems for electrical equipment have been proposed in which an insulation monitoring system for the power receiving equipment of a cubicle sends an abnormality report to a monitoring center via a network, and then a maintenance worker or the like is notified. For example, there is an electrical equipment monitoring system (Patent Document 1) that notifies a monitoring computer of necessary information in response to the occurrence and recovery of an abnormality that occurs in the electrical equipment, stores the necessary information in a database of the monitoring computer connected to each terminal device via a public line, and notifies information on the history of the occurrence and recovery of an abnormality in each electrical equipment during a specified period of time, an electrical equipment monitoring system (Patent Document 2) that controls the generated power of a private power generation device so as not to exceed the power consumption by a monitoring device that transmits power consumption information and generated power information to a cloud server, and an electrical equipment inspection system (Patent Document 3) that uses a sensor that can detect monitored elements of electrical equipment, compares the monitored elements with abnormality patterns, and determines that an abnormality exists in the electrical equipment if the monitored elements contain an abnormality pattern. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2000-166127 [Patent Document 2] Patent No. 2020-202729 [Patent Document 3] Patent No. 2023-16397 Summary of the Invention [Problem to be solved by the invention]

[0005] However, conventional remote monitoring devices for electrical equipment are limited to monitoring items for power outages and electrical leakage in the cubicle as insulation monitoring targets. Therefore, when a power outage or 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 unknown, making on-site inspection necessary. For this reason, it takes time to restore the surrounding area, including the business operator, after a power outage or other accident that spreads, and this places a heavy burden on electrical management engineers. In addition, conventional remote monitoring devices require high initial costs for installing the equipment, etc., and high running costs for communication, etc.

[0006] The present invention has been made in consideration of such problems, and an object of the present invention 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 that have high reliability for abnormality information and reduce costs, which solve the above problems. [Means for solving the problem]

[0007] The inventor has constructed a monitoring system that can monitor not only power outages and leakage currents in cubicles, but also information detected by SOG equipment, and can collect abnormal information such as failures in both SOG equipment and cubicles.The inventor has then invented a remote monitoring system, method, and program for remote monitoring electrical equipment that can scrutinize important information when grasping power outages and other accidents, package useful failure information, and determine the severity of the accident, including whether the cause is inside or outside the premises.

[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 an SOG equipment, a cubicle, and an output device, the SOG equipment including 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 including a power supply unit, an insulation monitoring unit, an abnormality detection unit for cubicle connected to a main circuit breaker operation detection vibration sensor, and a multi-contact information acquisition and transmission unit for cubicle, the multi-contact information acquisition and transmission unit for SOG The signal obtained by the abnormality detection unit is transmitted to a multi-contact information acquisition and transmission unit for the cubicle, and the multi-contact information acquisition and transmission unit for the cubicle transmits information created from the signal obtained by the abnormality detection unit for the SOG and / or the abnormality detection unit for the cubicle to the output device, and the output device outputs each piece of information regarding power outage, SOG power loss, SOG earth fault, SOG overcurrent, SOG control, main circuit breaker operation, leakage current in low-voltage power circuit, and leakage current in low-voltage lighting circuit obtained from the SOG equipment and the cubicle. The cubicle abnormality detection unit is also characterized in that it is connected to the control unit and the memory unit. The multi-contact information acquisition and transmission unit for the cubicle is also characterized in that it is connected to the control unit and the memory unit. The present invention is also characterized in that abnormalities in the SOG equipment and / or the cubicle are detected and determined, and abnormality information is output by the output device. The present invention is also characterized in that the soundness of the remote monitoring system for the electrical equipment is confirmed at a predetermined time. The predetermined time period can be changed arbitrarily. The predetermined time is a fixed time. The certain period of time is any one of 6 hours, 12 hours, 24 hours, 2 days, 3 days, 1 week, and 1 month. Further, the abnormality or normality of each piece of information is expressed by binary information. The SOG abnormality detection unit and the SOG multi-contact information acquisition and transmission unit are also provided within the SOG control device. The size of the SOG abnormality detection unit and the SOG multi-contact information acquisition and transmission unit is within 40 mm x 130 mm x 25 mm in length, width and height. The multi-contact information acquisition and transmission unit for the cubicle and the output device are also characterized by wireless communication. The multi-contact information acquisition and transmission unit for the cubicle and the output device are characterized by wireless communication using SIGFOX (registered trademark). 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 by wireless communication. 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 by performing wireless communication using Wi-Fi (registered trademark) and / or ESP-NOW. The SOG abnormality detection unit and the SOG multi-contact information acquisition and transmission unit are characterized by being equipped with a battery. The cubicle abnormality detection unit and the cubicle multi-contact information acquisition and transmission unit are also characterized in that they are equipped with a backup battery. The method for remotely monitoring electrical equipment according to the present invention is a method for remotely monitoring electrical equipment using a remote monitoring system for electrical equipment including an SOG equipment, a cubicle, and an output device, the SOG equipment including 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 including a power supply unit, an insulation monitoring unit, an abnormality detection unit for cubicle connected to a main circuit breaker operation detection vibration sensor, and a multi-contact information acquisition and transmission unit for cubicle, the multi-contact information acquisition and transmission unit for SOG being The method includes a step of transmitting a signal obtained by an abnormality detection unit for SOG to a multi-contact information acquisition and transmission unit for the cubicle, which transmits information created from the signal obtained by the abnormality detection unit for SOG and / or the abnormality detection unit for the cubicle to the output device, and the output device outputs information on power outage, SOG power loss, SOG earth fault, SOG overcurrent, SOG control, main circuit breaker operation, leakage current in low-voltage power circuit, and leakage current in low-voltage lighting circuit obtained from the SOG equipment and the cubicle. The remote monitoring program for electrical equipment according to the present invention is a remote monitoring program for electrical equipment of a remote monitoring system for electrical equipment including SOG equipment, a cubicle, and an output device, the SOG equipment includes a SOG control device, an abnormality detection unit for SOG connected to a SOG power supply 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 cubicle connected to a main circuit breaker operation detection vibration sensor, and a multi-contact information acquisition and transmission unit for cubicle, the multi-contact information acquisition and transmission unit for SOG the signal obtained by the abnormality detection unit for the SOG to a multi-contact information acquisition and transmission unit for the cubicle, the multi-contact information acquisition and transmission unit for the cubicle transmitting information created from the signal obtained by the abnormality detection unit for the SOG and / or the abnormality detection unit for the cubicle to the output device, and the output device outputting each information of power outage, SOG power loss, SOG earth fault, SOG overcurrent, SOG control, main circuit breaker operation, leakage current in a low-voltage power circuit, and leakage current in a low-voltage lighting circuit obtained from the SOG equipment and the cubicle. Effect of the Invention

[0009] By using the remote monitoring system, method, and program for monitoring electrical equipment of the present invention, it becomes possible to constantly monitor abnormalities in the SOG equipment and cubicles, and to comprehensively grasp the accident status of power outages and electric leakage. This makes it possible to judge the urgency of the accident. This leads to early recovery from the accident, including the initial response, and improves customer peace of mind and reliability. In particular, monitoring the loss of power to the SOG control device is an unprecedented idea, and it makes it possible to detect failures of the SOG control device and human errors caused by security workers forgetting to turn it on, thereby preventing serious failures such as cascading accidents from occurring. [Brief description of the drawings]

[0010] [Figure 1] 1 is an overall configuration diagram of a remote monitoring system 1 for electrical equipment according to an embodiment. [Diagram 2] 4 is a control flowchart for detecting and determining an abnormality in the electric equipment remote monitoring system 1 according to the embodiment. [Diagram 3] 4 is a control flowchart for determining the health of the system at a predetermined time in the electric equipment remote monitoring system 1 according to the embodiment. [Figure 4] This is an example of supplying electricity to the power equipment of a private electrical facility. [Diagram 5] An example of a notification email displayed on the output device 4 is shown. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The following is a detailed description of the embodiments of the present invention, but the present invention is not limited to the following embodiments and can be modified in various ways within the scope of the present invention. Furthermore, the examples given are not limited to the examples, and can be modified as desired without departing from the scope of the present invention.

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

[0013] 2 shows the control for detecting and determining abnormalities in the SOG equipment 2 and / or the cubicle 3 in the electric equipment remote monitoring system 1 of the present invention. The dotted lines represent the process performed in MID-s11 and the process performed in MID-c12, respectively.

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

[0015] Step S101: Detect anomalies using SOG equipment and sensors Anomalies such as short circuits, ground faults, and power outages are detected using devices and sensors such as an SOG control device 24 equipped with a PAS 23 and an SOG power supply current detection sensor 25, which are installed in the SOG facility 2. Anomalies may be detected by one device or sensor, or by multiple devices and sensors.

[0016] Step S102: Acquire a signal in the abnormality detection unit for SOG The SOG abnormality detection unit 21 of the SOG facility 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, if an abnormality is detected by these devices or sensors, a signal is immediately sent to the SOG abnormality detection unit 21, and the connected SOG abnormality detection unit 21 acquires the signal.

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

[0018] Step S104: Acquire a signal at the multi-contact information acquisition and transmission unit for the cubicle The signal transmitted from the multi-contact information acquisition and transmission unit 22 for SOG in step S 103 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 for accidents, breakdowns, and electrical leakage When a signal is obtained by the multi-contact information acquisition and transmission unit 32 for the cubicle in step S104, the control unit 37 connected to the multi-contact information acquisition and transmission unit 32 for the cubicle creates abnormality information of accidents, failures, and leakage current from the signal. The abnormality information is composed of at least the information of power outage, SOG power loss, SOG earth fault, SOG overcurrent, SOG control, main circuit breaker operation, leakage current in the low-voltage power circuit, and leakage current in the low-voltage lighting circuit, and indicates that one or more pieces of information are abnormal. For each of these pieces of information, a judgment is made as to whether it is abnormal or normal, and abnormality is indicated as contact information of on (1) and normality is indicated as off (0). For SOG power loss, a threshold is set, and it is determined that a power loss has occurred when the current of the SOG power source falls below the threshold. Since the normal state is 10 to 20 mA, the threshold is set at a current value below that. For example, the threshold is set at 5 mA, but the current value can be set arbitrarily as long as it is a threshold value that can be used to determine that a power loss has occurred.

[0020] Each piece of information regarding power outage, loss of SOG power supply, SOG earth fault, SOG overcurrent, SOG control, main circuit breaker operation, leakage current in the low-voltage power circuit, and leakage current in the low-voltage lighting circuit may be recorded in the memory unit 38 until it is determined whether all of the information is abnormal or normal. Furthermore, when all of the information is collected, the control unit 37 may convert the information into information for which it has been determined whether it is abnormal or normal.

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

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

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

[0024] Step S111: Detect abnormalities in cubicle devices and sensors Abnormalities such as short circuits, ground faults, and power outages are detected using devices and sensors such as a power supply unit 33, an insulation monitoring unit 35 equipped with a leakage detection sensor 34, and a main circuit breaker operation detection vibration sensor 36, which are installed in the cubicle 3. An abnormality may be detected by one device or sensor, or by multiple devices or sensors.

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

[0026] Step S113: Create abnormality information for accidents, breakdowns, and electrical leakage When a signal is obtained in the cubicle abnormality detection unit 31 in step S112, abnormality information on the accident, malfunction, and leakage current is created in the control unit 37 connected to the cubicle abnormality detection unit 31. The abnormality information is the same as that shown in step S105 above.

[0027] Step S114: Acquire and transmit abnormality information through the multi-contact information acquisition and transmission unit for the cubicle The abnormality information created in step S113 is transmitted from the cubicle multi-contact information acquisition and transmission unit 32. Step S114 is similar to the content shown in step S106 above.

[0028] Step S115: Output the abnormality information on the output device The abnormality information transmitted from the multi-contact information acquisition and transmission unit 32 for cubicles in step S114 is acquired and output by the external output device 4 via the network 6. Step S115 is similar to the content shown in step S107 above.

[0029] When an abnormality is detected in both the SOG equipment 2 and the cubicle 3, the processes of steps S101 to S104 and steps S111 to S112 are performed as described above. The subsequent processes of steps S105 and S113, steps S106 and S114, and steps S107 and S115 are performed simultaneously, and abnormality information is output. When creating abnormality information on accidents, malfunctions, and leakage current in steps S105 and S113, the abnormality information on both the SOG equipment 2 and the cubicle 3 may be collected and recorded in the memory unit 38 for each information on power outage, loss of SOG power supply, SOG earth fault, SOG overcurrent, SOG control, main circuit breaker operation, leakage current in the low-voltage power circuit, and leakage current in the low-voltage lighting circuit.

[0030] Regarding the above steps S101 to S107 and steps S111 to S115, it is sufficient that the abnormality information of the SOG equipment 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, and the acquisition order of the signals acquired and transmitted by each multi-contact information acquisition and transmission unit 22 for the SOG and the multi-contact information acquisition and transmission unit 32 for the cubicle can be interchanged. The acquisition order of the signals detected by the SOG abnormality detection unit 21 for the SOG equipment 2 and the cubicle abnormality detection unit 31 for the cubicle 3 can also be interchanged.

[0031] The SOG abnormality detection unit 21 and the cubicle abnormality detection unit 31 obtain signals from devices, sensors, etc. that are always connected. For example, after abnormality information of the SOG equipment 2 is detected, the information is transmitted from the SOG multi-contact information acquisition and transmission unit 22 to the cubicle multi-contact information acquisition and transmission unit 32, and the multi-contact information acquisition and transmission unit 32 for the cubicle connects to the power supply unit 33, insulation monitoring unit 35, and main circuit breaker operation detection vibration sensor 36 via the cubicle abnormality detection unit 31 to acquire the signal, which is then converted into abnormality information by the control unit 37.

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

[0033] Next, control for determining the health of the system at a predetermined time in the electric equipment remote monitoring system 1 of the present invention is shown in Fig. 3. When checking the health of the electric equipment remote monitoring system 1, normal information is output by the following process of steps S201 to S204.

[0034] Step S201: A timer counts down a predetermined period of time. The SOG abnormality detection unit 21 of the SOG equipment 2 and the cubicle abnormality detection unit 31 of the cubicle 3 are always in a standby state and do not receive any signal. On the other hand, the multi-contact information acquisition and transmission unit 32 for the cubicle of the MID-c12 performs a timer count setting. The predetermined time may be at regular intervals or at a set time. When setting a fixed time, any time such as 6 hours, 12 hours, 24 hours, 2 days, 3 days, 1 week, or 1 month can be set, but 24 hours is preferable. The timer count setting may be recorded in the connected memory unit 38, and timer count information may be obtained from the control unit 37.

[0035] Step S202: Creating normality information to check the system health When a predetermined time has elapsed in step S201, normal information is created by the control unit 37 connected to the multi-contact information acquisition and transmission unit 32 for the cubicle. By creating the normal information, the remote monitoring system 1 for electrical equipment that detects and judges abnormalities in the SOG equipment 2 and / or the cubicle 3 performs a self-diagnosis as to whether it is operating normally. The normal information is composed of at least information on power outage, loss of SOG power supply, SOG earth fault, SOG overcurrent, SOG control, main circuit breaker operation, leakage current in the low-voltage power circuit, and leakage current in the low-voltage lighting circuit, and each of these is judged to be normal. This makes it possible to avoid abnormal states of the system, such as loss of power supply to the MID-s11 or MID-c12, or runaway of the program used for control. In addition, 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 normality 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 on 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 the external output device 4 via the network 6. The transmitted normal information is output immediately, but there may be a communication time lag of about several minutes. If normal information confirming the soundness of the system is not output within a specified time, an on-site inspection by an electrical management engineer is required to check for the presence or absence of an abnormality in the remote monitoring system 1 for electrical equipment.

[0038] The remote monitoring system 1 for electrical equipment of the present invention targets private electrical facilities, but can be applied to any type of electrical equipment that requires remote monitoring for power outages, earth leakage, etc. Private electrical facilities are defined in Article 38 of the Electricity Business Act of Japan as electrical facilities other than electrical facilities used for electric power businesses and general-use electrical facilities, and refer to electrical facilities that receive high voltage or extra-high voltage electricity, power generation facilities other than small output, etc. They are mainly business establishments such as factories, office buildings, schools, hospitals, hotels, sports facilities, entertainment facilities, farms, coal mines, etc., and also include those that have electric lines leading to electrical facilities located outside the premises.

[0039] An example of supplying power to the electrical equipment of a private electrical facility is shown in Figure 4. An electric wire is drawn into the premises from a branch switch installed on a distribution pole, which is the power company's equipment, and is changed to low voltage in the cubicle through a lead-in cable installed on a premises pole installed on the customer's premises after the responsibility demarcation point, which is a high-voltage receiving and transforming equipment. The power is then supplied to the premises equipment where a breaker is installed. The voltage supplied by the power company is 6,600V, but the cubicle converts it to 200V or 100V, and uses it as a 200V power source for power and a 100V power source for lighting in factories and stores through a distribution board. An SOG control device is installed on the premises pole, and by opening the high-voltage air switch (PAS), it prevents a cascading accident when a short circuit or ground fault occurs in the electrical equipment of the customer's location that receives power from a power plant or substation. A cascading accident is when an accident in the electrical equipment of the customer's location causes the power supply of the power plant or substation to stop, or causes a power outage to other customers. It goes without saying that the shapes, arrangements, voltages, device names, etc. of the structures shown in FIG. 4 are merely examples and can be changed as appropriate according to the applications and functions.

[0040] The SOG in SOG equipment 2 stands for Storage Overcurrent Ground, and performs an earth fault tripping operation with an overcurrent trip. SOG operations include SO operation and G operation. SO operation is an overcurrent tripping operation that trips after the distribution line has no voltage, providing protection from overload or short circuit current. G operation is a ground fault tripping operation that provides protection from earth faults. If a ground fault and overcurrent (short circuit) occur simultaneously, SO operation takes priority.

[0041] FIG. 1 shows the minimum necessary configuration for the remote monitoring system 1 of the electrical equipment of the present invention, but various devices and sensors necessary for protection from short circuits and ground faults can be installed. For example, the system is equipped with an insulation monitoring unit and is protected by a plastic box or the like. The devices and sensors can be general-purpose or homemade. The devices and sensors can be configured to be removable due to updates or failures. These devices and sensors can be configured with independent integrated circuits, microprocessors, firmware, etc., and can each include, for example, a control unit for converting the signals obtained, a storage unit for recording the obtained signals and information converted by the control unit, an input unit for inputting information, and an output unit for outputting the obtained information.

[0042] In the SOG equipment 2, when a short circuit or a ground fault occurs in the high-voltage equipment on the customer's premises after a pole mounted air insulated switch (PAS), which is a type of switch, the PAS 23 is opened and cut off to prevent a cascading accident. That is, in the SOG equipment 2, the SOG control device 24 controls the PAS 23. In the case of a ground fault, the power distribution line does not lose power, and the SOG control device 24 operates to open the PAS 23. In the case of an overcurrent (short circuit) fault, the high-voltage line loses power and at the same time, the PAS 23 is opened by the SO operation of the SOG control device 24, and the fault point is separated. In the case of a ground fault and an overcurrent (short circuit) fault occurring at the same time, the SO operation has priority and operates in the case of an overcurrent fault. The SOG power supply current detection sensor 25 monitors the presence or absence of power supply for the SOG control device 24 to prevent a cascading accident from occurring when the power supply is lost due to the SOG function not working. The SOG control device 24 is installed in a plastic or stainless steel box to be installed outdoors. The SOG control device 24 is connected to the SOG abnormality detection unit 21, and commercially available equipment can be used.

[0043] PAS23 is a type of switch that is installed on the top of a utility pole, which is an electrical facility that receives high voltage electricity. It detects earth faults and short circuits that occur within the electrical facility and automatically opens the circuit to minimize the impact of accidents that could spread to other customers. PAS23 can also replace devices such as Underground Gas Switch (UGS).

[0044] The SOG abnormality detection unit 21 and the SOG multi-contact information acquisition and transmission unit 22 are integrally configured in the form of MID-s11 (Multi Information Detection device-SOG) shown by dotted lines. However, the SOG abnormality detection unit 21 and the SOG multi-contact information acquisition and transmission unit 22 can be provided separately. The MID-s11 is mainly powered by a battery, and waits in a sleep state to minimize battery consumption, and when the SOG abnormality detection unit 21 receives a signal, it resumes (starts up). The SOG abnormality detection unit 21 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 SOG multi-contact information acquisition and transmission unit 22 to the cubicle multi-contact information acquisition and transmission unit 32. The SOG control device 24 and the SOG power supply current detection sensor 25 may be connected to the SOG multi-contact information acquisition and transmission unit 22 by wire, wireless, or a hybrid form thereof. Also, if there is a connection to the multi-contact information acquisition and transmission unit 22 for SOG, the connection may be made via a separately provided device or the like.

[0045] The SOG abnormality detection unit 21 and the SOG multi-contact information acquisition and transmission unit 22 are preferably sized to fit within a box in which the SOG control device 24 is installed. Even if the installation space is small, they can be installed by making the device compact. The size is, for example, within 40 mm length, width, and height x 130 mm x 25 mm. With such dimensions, they can be stored within a commercially available SOG control device 24. This makes it possible to reduce costs and make the device compact enough to fit within a SOG control device, which was previously difficult.

[0046] The cubicle 3 is a cubicle-type high-voltage power receiving facility, and is a set of equipment that converts high voltage into a voltage that can be used in the facility. The power supply unit 33 of the cubicle 3 is an outlet in the cubicle 3, and detects a power outage. Although FIG. 1 shows the minimum necessary configuration for the remote monitoring system 1 of the electrical equipment of the present invention, multiple devices and sensors can be installed if necessary to safely convert the voltage. The devices and sensors to be installed include, for example, a transformer, a measuring transformer, a disconnecting switch, a VCT, a vacuum circuit breaker, a current transformer, a high-voltage phase-advance capacitor, a series reactor, a high-voltage AC load switch, an ammeter, a voltmeter, a wiring circuit breaker, a protection device, and the like, and are protected by a roof and a base of a copper plate bottom plate, etc. The devices and sensors may be configured to be removable due to updates or malfunctions. These devices, sensors, etc. may each be composed of an independent integrated circuit, microprocessor, firmware, etc., and may each be equipped with, for example, a control unit for converting the obtained signals, etc., a memory unit for recording the obtained signals, etc. and information converted by the control unit, an input unit for inputting information, and an output unit for outputting the obtained abnormal information and / or normal information, etc.

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

[0048] The main circuit breaker operation detection vibration sensor 36 detects the operation vibration of the main circuit breaker that cuts off the electric circuit, and detects that the main circuit breaker has been operated. The main circuit breaker can be a vacuum circuit breaker (VCB) or a high-voltage AC load break switch (LBS), and opens the electric circuit when it detects an abnormality such as a short circuit or a ground fault.

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

[0050] The multi-contact information acquisition and transmission unit 32 for the cubicle is installed inside the cubicle 3 and acquires signals from the entire electrical equipment including the SOG equipment 2. The abnormality detection unit 31 for the cubicle is connected to the power supply unit 33, the insulation monitoring unit 35 having the leakage detection sensor 34, and the main circuit 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 the SOG and / or the information obtained from the abnormality detection unit 31 for the cubicle is transmitted from the multi-contact information acquisition and transmission unit 32 for the cubicle to the external output device 4. The connection between the power supply unit 33, the insulation monitoring unit 35, and the main circuit breaker operation detection vibration sensor 36 and the abnormality detection unit 31 for the cubicle may be wired, wireless, or a hybrid of these. In addition, if there is a connection to the multi-contact information acquisition and transmission unit 32 for the cubicle, it may be connected via a separately provided device or the like. The multi-contact information acquisition and transmission unit 32 for the cubicle may be configured separately for acquiring signals from the multi-contact information acquisition and transmission unit 22 for the SOG and for acquiring abnormal information on accidents, malfunctions, and electrical leakage, as well as normal information, and transmitting this to an external output device 4.

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

[0052] The control unit 37 processes information from the obtained signals, etc., for remote monitoring items such as power outage, SOG power loss, SOG earth fault, SOG overcurrent, SOG control, main circuit breaker operation, low-voltage power circuit leakage, and low-voltage light circuit leakage, and judges whether each information is abnormal or normal. The information obtained may differ depending on the model of the SOG equipment 2 and the cubicle 3. For power outages, power outage monitoring of the power supply equipment is performed. For SOG power loss, in order to prevent SOG control from not working and leading to a cascading accident, the power supply of the SOG control device is monitored. For SOG earth faults, in order to prevent delays in power restoration because the cause of the accident is unknown and an on-site investigation is required, a ground fault accident is monitored. For SOG overcurrents, in order to prevent delays in power restoration because the cause of the accident is unknown and an on-site investigation is required, a short circuit accident is monitored. For SOG control, in order to prevent SOG control from not working or malfunctioning and leading to a cascading accident, an abnormality monitoring of the SOG control device is performed. The main circuit breaker operates to monitor for short circuit accidents in cubicle 3 by operating the VCB (vacuum circuit breaker) and LBS (high voltage AC load breaker) in order to prevent delays in power restoration when the cause of the accident is unknown and an on-site investigation is required. For leakage current in the low voltage power circuit, leakage current accidents in the three-phase circuit are monitored. For leakage current in the low voltage lighting circuit, leakage current accidents in the single-phase circuit are monitored.

[0053] On the other hand, in the present invention, the temperature monitoring of the transformer is not included in the remote monitoring items that were conventionally performed, and the cost reduction is realized 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 circuit breaker is operated. In addition, it is possible to avoid the circuit expansion caused by having the MID-c12 judge the analog value.

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

[0055] The storage unit 38 stores the results of the arithmetic processing performed by the control unit 37, as well as control programs and databases used for various processes of the information processing device. The storage unit 38 has memory devices such as RAM, ROM, and flash memory. The control programs may be installed from computer-readable recording media such as CD-ROM, DVD-ROM, USB memory, and external hard disk, or via the Internet. The control programs 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 a network 5. The connection is wireless, 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, LPWA (Low Power Wide Area) such as Wi-SUN, etc. The connection may be directly between 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. Preferably, Wi-Fi (registered trademark) and / or ESP-NOW are used, which minimize the amount of information by binarizing it and have low running costs and low power consumption.

[0057] The output device 4 can be any device that has an output section such as a mobile phone or a personal computer and can obtain text information. Examples of accidents in electrical equipment include power outages, short circuits, ground faults, and leakage currents. The remote monitoring system 1 for electrical equipment of the present invention outputs information that is focused on high importance and allows the severity of the accident to be clearly understood at a glance. In other words, if the remote monitoring system 1 for electric power equipment of the present invention obtains abnormal information in any of the following items: power outage, loss of SOG power supply, SOG ground fault, SOG overcurrent, SOG control, main circuit breaker operation, leakage current in low-voltage power circuit, or leakage current in low-voltage lighting circuit, an on-site inspection 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, and the measured values ​​input from each sensor are displayed. (b) is an example of output of abnormality information in the system of the present invention, and it is clear that there is an abnormality because power outage and SOG overcurrent are displayed as 1. Preferably, the information provided by email is digital binary information such as 0 and 1 for simplification and to reduce communication volume. SOG earth faults and SOG overcurrents may cause power outages in the surrounding area and lead to serious accidents, so immediate on-site confirmation is required. (c) is an example of output of normal information in the system of the present invention, and normal information is sent periodically as a regular normal report, and 255 is displayed for all items. The notification email may be a text message, and examples include electronic mail (E-mail), LINE (registered trademark), and SMS.

[0059] Cloud services can also be used for output. In this case, information is transmitted from the multi-contact information acquisition and transmission unit 32 for the cubicle to a cloud server, and the email information is output on the output device 4, which is a mobile phone or a personal computer. The cloud server can be used to enter the customer's name in each communication email, which is expected to improve service.

[0060] The multi-contact information acquisition and transmission unit 32 for the cubicle and the output device 4 are connected via a network 6. The network 6 is connected wirelessly, and examples include infrared, BLUETOOTH (registered trademark), Wi-Fi (registered trademark), ESP-NOW, SIGFOX (registered trademark), wireless LAN, 3G, 4G / LTE (Long Term Evolution), 5G, LoRa, LPWA such as Wi-SUN, etc. The connection may be made directly between the multi-contact information acquisition and transmission unit 22 for the SOG and the multi-contact information acquisition and transmission unit 32 for the cubicle, or may be made 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 SIGFOX (registered trademark) can be preferably used, taking into consideration the initial introduction cost, running cost, and power consumption. In particular, the running cost 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, and if the average number of customers of a management engineer is 40, the total communication fee will be about 320,000 yen per year, and about 3.2 million yen over 10 years. By using SIGFOX (registered trademark), this amount can be reduced to about 1,200 yen per device per year, and about 480,000 yen over 10 years.

[0062] The remote monitoring system 1 for electrical equipment of the present invention can grasp abnormalities in both the SOG equipment 2 and the cubicle 3, and therefore can determine the approximate location where the abnormality was detected and its severity. Specifically, a power outage indicates that a power outage occurred both on-site and off-site. A loss of SOG power supply or SOG control is not a direct accident, but indicates that the SOG function will not work when an accident occurs, leading to a serious accident such as a power outage spreading outside the premises. A SOG earth fault or short circuit indicates that although there is protection to prevent the accident from spreading outside the premises, there is a possibility of an accident spreading outside the premises in some cases. The operation of the main circuit breaker basically indicates an accident on-site. A leakage current in the low-voltage power circuit or low-voltage lighting circuit indicates an accident on-site.

[0063] By using the remote monitoring system 1 for electrical equipment of the present invention, it is possible to prevent a relatively large accident, such as a cascading accident caused by an accident in an electrical equipment such as a power outage, short circuit, earth fault, or leakage current, in which the power transmission is automatically stopped at the substation of the power company, and the power outage also affects adjacent buildings, factories, houses, etc., and even if an accident does occur, it is possible to take measures such as dispatching an electrical management engineer to the site as soon as possible to prevent it from becoming a serious problem. In addition, it is also possible to efficiently take measures against causes such as poor maintenance due to aging of equipment, natural disasters such as lightning strikes and intrusion of rainwater, worker negligence such as damage to power cables during excavation work or reconstruction work, contact with birds and animals, and intrusion of small animals by identifying the location where an abnormal signal is detected. [Industrial Applicability]

[0064] The remote monitoring system for electrical equipment of the present invention can determine the severity of an accident, including whether the cause is inside or outside the premises, when a power outage or other accident is identified, and can reduce the labor required for the security of power equipment. There are concerns about a future labor shortage in the electrical equipment security business, and smart security is being advocated and promoted nationwide, including by the Ministry of Economy, Trade and Industry, and this system is in line with this philosophy. In addition, the remote monitoring system for electrical equipment of the present invention has excellent running costs and can be used as a general-purpose system by businesses that have private electrical facilities. It is also beneficial for customers, as it leads to early identification of the cause of the accident, early recovery from the accident, and resumption of business.

Claims

1. A remote monitoring system for electrical equipment including a SOG facility, a cubicle, and an output device, The SOG equipment includes an SOG control device, an SOG abnormality detection unit connected to an SOG power supply current detection sensor, and an SOG multi-contact information acquisition and transmission unit; The cubicle includes 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 cubicle, The multi-contact information acquisition and transmission unit for the cubicle transmits information created from the signals obtained by the abnormality detection unit for the SOG and / or the abnormality detection unit for the cubicle to the output device; A remote monitoring system for electrical equipment, characterized in that the output device outputs information on power outages, SOG power loss, SOG ground faults, SOG overcurrents, SOG control, main circuit breaker operation, leakage current in low-voltage power circuits, and leakage current in low-voltage lighting circuits obtained from the SOG equipment and the cubicle.

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

3. 3. The remote monitoring system for electrical equipment according to claim 2, wherein the health of the remote monitoring system for electrical equipment is confirmed at a predetermined time.

4. 4. The remote monitoring system for electrical equipment according to claim 1, wherein each piece of information is expressed as being normal or abnormal by binary information.

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

6. The remote monitoring system for electrical equipment according to claim 5, wherein the multi-contact information acquisition and transmission unit for the cubicle and the output device communicate wirelessly using SIGFOX (registered trademark).

7. The remote monitoring system for electrical equipment as described in 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 cubicle communicate wirelessly using Wi-Fi (registered trademark) and / or ESP-NOW.

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

9. A remote monitoring program for an electrical equipment remote monitoring system including an SOG facility, a cubicle, and an output device, The SOG equipment includes an SOG control device, an SOG abnormality detection unit connected to an SOG power supply current detection sensor, and an SOG multi-contact information acquisition and transmission unit; The cubicle includes 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 cubicle, The multi-contact information acquisition and transmission unit for the cubicle transmits information created from the signals obtained by the abnormality detection unit for the SOG and / or the abnormality detection unit for the cubicle to the output device; The output device is a program for remote monitoring of electrical equipment, which causes a computer to execute a process of outputting information on power outages, loss of SOG power supply, SOG ground faults, SOG overcurrents, SOG control, main circuit breaker operation, leakage current in low-voltage power circuits, and leakage current in low-voltage lighting circuits obtained from the SOG equipment and the cubicle.

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