JP2016063616A - Electric power system, small-output power generation unit, and power storage unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly and appropriately identify a cause range of electric leak without manual work in an electric power system using a small-output power generation facility.SOLUTION: An electric power system 100 comprises an electric power meter 112 connected to an electric power system owned by an electric power company via a lead-in wire, a distribution board 114 connected to the electric power meter, a small-output power generation facility 116 connected to either of a plurality of branch circuits of the distribution board and located in a range excluding a general electric structure on which the electric power company is responsible for investigation, an ammeter 118 for measuring a value of leak current flowing between the distribution board and the small-output power generation facility, and an electric leak determination part 130 for determining whether electric leak occurs according to a measurement result of the ammeter.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electric power system capable of identifying a range (cause range of electric leakage) in which electric leakage has occurred in a low-voltage power receiving customer premises provided with small output electric power generation facilities (small output electric power generation facilities or storage batteries), and small output electric power generation. The present invention relates to a unit and a power storage unit.

  The consumer of low-voltage power reception is supplied with electricity (commercial power) from an electric power company (who supplies electricity and is obliged to investigate general electric facilities that use the supplied electricity). Electricity is used in the general electric works on the premises. Each consumer bears the responsibility of ensuring the security of general-purpose electric works that use electricity supplied from the electric power company in the premises. However, the electric power company is obligated by law to investigate whether there is a leak in a general-purpose electric work that uses electricity supplied by the electric power company. Therefore, the electric power company must periodically conduct a leakage check on a general electric work that uses electricity supplied from the electric power company.

  In addition, there is known a technique for automatically detecting a leakage in the vicinity of a power meter or smart meter on the power system side of the distribution board (for example, Patent Documents 1 and 2).

JP 2013-225967 A JP 2012-189539 A

  By the way, the electricity (commercial power) of the electric power company owned by the electric power company is drawn in, the electric power is supplied from the electric power company, and the electricity is used in the general electric work. There is known a technology for supplementarily supplying the energy. In this case, the consumer is responsible for ensuring the safety of the above-mentioned low-output power generation facility in addition to the general electric work that uses electricity supplied from the power company on the premises.

  However, as mentioned above, the electric power company is responsible for the investigation of the electric facilities for general use that use electricity supplied by the electric power company. If the leakage inspection of the load equipment is conducted regularly, continuous leakage can be avoided. However, small power generation facilities do not fall under the category of general electric works for which electric power companies are obligated to investigate, and the current laws and regulations do not stipulate who is obliged to investigate. Therefore, the power company is not obliged to investigate (or declares not to be obliged to investigate) small power generation facilities.

  Some leakages occur constantly, while others occur suddenly or temporarily depending on the state of the device. If electrical leakage is detected in the entire premises where the small output power generation facilities are installed through regular surveys by the electric power company, the electric power company is in the range of general electric works that use electricity supplied by the electric power company. Another day, the cause of the leakage is investigated, but this investigation may not identify the cause of the leakage. In such a case, the cause of the electric leakage is large. (1) Although it is in the range of general electric works that use electricity supplied from the electric power company, there are cases where the event is confirmed depending on the state of the equipment and may not be confirmed. . (2) There are two possible cases that occur outside the scope of general-purpose electric works that use electricity supplied by the power company, for example, in the range that includes small-output power generation facilities. Since there is no obligation to specify whether it is a current leak, the power company does not specify the cause range (cause location). Thus, if the cause range of the electric leakage is not known even by the investigation of the electric power company, there arises a problem that the customer who is responsible for ensuring the security does not know where to consult about the solution of such electric leakage.

  Therefore, in the range where the electric power company is not obligated to investigate (excluding general electric works for which the electric power company is obligated to investigate), and the area where the person who is obliged to investigate is not defined, Although there is no obligation to investigate, it is conceivable that the vendor of the small output power generation equipment dispatches an investigator to the customer premises and conducts a leakage check on the small output power generation equipment on a regular basis. In this way, whether the cause of the leakage is within the range where the electric power company is obligated to investigate (including general electric works for which the electric power company is obligated to investigate), or the area where the electric power company is not obligated to investigate It becomes possible to identify and lead to the solution of electric leakage. However, regular (for example, once every four years) leakage surveys conducted by investigators cannot respond to sudden leakages that occur between surveys. There is a problem that there is a problem of repeating the restoration, and if the leakage event cannot be confirmed at the time of the visit, it is necessary to wait for the event to occur.

  In view of such a problem, the present invention provides a power system capable of quickly and appropriately specifying the cause range of electric leakage, without requiring human intervention, even in an electric power system using a small output power generation facility, etc. An object of the present invention is to provide an output power generation unit and a power storage unit.

  In order to solve the above problems, an electric power system according to the present invention includes an electric power meter connected to an electric power system of an electric power company through a lead-in line, a distribution board connected to the electric power meter, and a plurality of distribution boards. The first low-power generation facility or the first storage battery connected to any one of the branch circuits is located in a range that does not include a general electric work for which the electric power company is obligated to investigate. The first ammeter that measures the value of the leakage current that flows between the one specified facility, the distribution board, and the first specified facility, and whether or not there is a leakage based on the measurement result of the first ammeter And a leakage determining unit.

  When it is determined that the distribution panel and the disconnection unit that cuts off the power supply to the first specified facility and the leakage determination unit is leaking, the distribution panel and the first specified facility are disconnected from the power supply through the disconnection unit. And a shut-off control unit that performs the operation.

  If it determines with the interruption | blocking part which is provided integrally with the 1st specific equipment, and interrupts electricity supply with the 1st specific equipment and the outside, and the earth leakage determination part has an electric leakage, the distribution board and the 1st specific equipment are passed through the interruption part. And a shut-off control unit that shuts off the energization.

  When the leakage determination unit determines that there is a leakage, a leakage notification unit that notifies the outside of the fact may be further provided.

  It is composed of either the second small output power generation facility or the second storage battery connected to a branch circuit different from the branch circuit to which the first specific facility is connected in the distribution board, and the power company is obliged to investigate A second specified equipment located in a range not including the electrical work for electric power, a distribution board, and a second ammeter that measures a value of a leakage current flowing between the second specified equipment, and determining leakage The unit may determine the leakage based on the measurement result of the second ammeter.

  In order to solve the above-described problem, the small-output power generation unit of the present invention is an electric power company connected to one of a plurality of branch circuits in a distribution board connected to a power system of the electric power company via a lead-in line. A small output power generation facility located in a range not including general electric works for which the inspection is obligated, a first ammeter for measuring a leakage current value flowing between the distribution board and the small output power generation facility, A leakage determining unit that determines whether or not a leakage occurs based on a measurement result of one ammeter.

  In order to solve the above problems, the power storage unit of the present invention is investigated by an electric power company connected to one of a plurality of branch circuits in a distribution board connected to an electric power system of the electric power company via a lead-in line. Based on a storage battery located in a range that does not include the general electric work to be obliged, a first ammeter that measures a leakage current value flowing between the distribution board and the storage battery, and a measurement result of the first ammeter And a leakage determining unit that determines whether or not there is a leakage.

  According to the present invention, even in an electric power system using a small output power generation facility or the like, it is possible to quickly and appropriately specify the cause range of electric leakage without human intervention.

It is explanatory drawing which showed the connection relation of the electric power system in 1st Embodiment. It is explanatory drawing which showed transition of the measurement result of an ammeter. It is explanatory drawing which showed the connection relation of the electric power system in 2nd Embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(First embodiment: power system 100)
FIG. 1 is an explanatory diagram showing a connection relationship of the power system 100 according to the first embodiment. The power system 100 is supplied with electricity (commercial power) from the power system 14 through the lead-in line 12. The electric power system 100 is configured in units of consumers, and the range thereof is not limited to houses and the like as long as it is a general electric facility (low-voltage power receiving consumer), but is a hospital, factory, hotel, leisure facility, commercial It may be a building unit such as a facility or a condominium, or a part of the building.

  The power system 100 includes a power meter 112, a distribution board 114, a small output power generation facility (first small output power generation facility) 116, an ammeter (first ammeter) 118, a disconnection unit 120, The control unit 122 and the load facility 16 are included.

  The power meter (power meter) 112 is connected to the power system 14 via the lead-in line 12 and measures the current value consumed by the power system 100. The distribution board 114 is connected to the power meter 112 and is provided in each of a leakage breaker (leakage breaker) that cuts off the supply of electricity in response to detection of a leakage and a plurality of branch circuits 124, and an allowable current (for example, 20A). It has a circuit breaker (safety breaker) that cuts off the supply of electricity when exceeding.

  The small-output power generation facility 116 as a specific facility is connected to one of a plurality of branch circuits 124 in the distribution board 114 via a dedicated wiring 126, converts other energy into electrical energy, generates electricity, and generates The supplied electricity is supplied to the load facility 16 independently from the power system 14. As such a small output power generation facility 116, in addition to the internal combustion power generation and the fuel cell, a renewable energy such as a solar power generator, a wind power generator, a hydroelectric power generator, a geothermal power generator, a solar heat power generator, an atmospheric heat power generator, etc. is used. Various devices can be used. However, the low-output power generation facility 116 is a low-output power generation facility defined by the Electricity Business Law. For example, a solar power generator with an output of less than 50 kW, a wind power generator with an output of less than 20 kW, an internal combustion engine In power generation, the output is limited to less than 10 kW. When such a small output power generation facility 116 is installed, the entire range on the side of the small output power generation facility 116 starting from the distribution board 114 is a range in which a person who is obliged to investigate is not defined, that is, an electric power company investigates. As a result, the low-output power generation facility 116 is located in a range where the electric power company is not obliged to investigate. . In addition, a storage battery (first storage battery) that is a general electric work can be used instead of the small-output power generation facility 116 as the specific facility (first specific facility). In the present embodiment, in order to facilitate understanding, the small-output power generation facility 116 will be described as a specific facility, but it goes without saying that the same effect can be obtained even if this is replaced with a storage battery.

  Such a duty of investigation on the premises of the small output power generation facility 116 has the following problems in accordance with laws and regulations. That is, for the distribution board 114 and the load facility 16 which are general electric works using electricity supplied from the electric power company on the premises, the electric power company (which supplies electric power to the general electric work) Is responsible for the investigation, so that the inspector of the electric power company regularly conducts a leakage check of the electric works for general use that use the electricity supplied from the electric power company. The electric power company may entrust the investigation to the Electrical Safety Association. However, the small output power generation facility 116 does not fall under the category of a general electric work for which the electric power company is obligated to investigate, and the person responsible for the investigation is not defined (the demarcation point of responsibility is determined by the small output power generation facility 116). Even if a ground fault is detected throughout the premises, the power company conducts another day of investigation on the ground fault only for general electric works that use electricity supplied by the power company. As a result of the investigation, if the cause range of the earth leakage could not be identified at the time of the investigation, it is large. (1) Within the range of general electric works that use electricity supplied by the electric power company, depending on the condition of the equipment. Leakage that may or may not occur, and (2) Leakage that occurs outside the scope of general electric works that use electricity supplied by the power company, for example, in the range that includes small-output power generation facilities. It can be one of the two. However, the power company is not obligated to determine which is the cause and specify the cause range of the electric leakage, and does not specify the cause range. In this way, the cause range of leakage is within the range where the electric power company is obligated to investigate (including general electric works for which the electric power company is obligated to investigate), or the area where the electric power company is not obligated to investigate, ie, responsibility If it is not possible to determine which side of the demarcation point has the cause of the leakage, the customer who has to ensure the security does not know where to consult about the solution of such a leakage.

  Therefore, for a range in which the electric power company is not obligated to investigate, for example, although there is no obligatory investigation, the vendor of the small output power generation facility 116 uses the ammeter 118 and the control unit 122 shown below to independently use the small output power generation facility. Execute 116 leakage check. By doing so, it is possible to specify whether the cause range of the leakage is a range where the electric power company is obliged to investigate, or an area where the electric power company is not obligated to investigate, and it is possible to lead the solution to the electric leakage.

  In the ammeter (current transformer) 118, a dedicated wiring 126 that connects the distribution board 114 and the small output power generation facility 116 is inserted (clamped) into a through body (iron core, core) provided with a primary winding. The leakage current value of the dedicated wiring 126 is converted into a measured value and transmitted to the control unit 122. Here, the dedicated wiring 126 is composed of R-phase, N-phase, and T-phase three wires, and even if all three R-phase, N-phase, and T-phase wires are inserted into one through body of the ammeter 118. Alternatively, the current values may be summed by inserting the R-phase, N-phase, and T-phase through the three penetrators of the ammeter 118. The disconnection unit 120 includes a breaker, an inverse conversion device, and the like, and opens the breaker or gates the inverse conversion device to disconnect the small output power generation facility 116, and the distribution board 114 and the small output power generation The power supply to the facility 116 is cut off.

  The control unit 122 is configured by a semiconductor integrated circuit including a central processing unit (CPU), a ROM storing programs, a RAM as a work area, and the like, and controls the entire small output power generation facility 116. Here, an example in which the control unit 122 is provided separately from the small output power generation facility 116 will be described. However, the control unit 122 may be formed integrally with the small output power generation facility 116 or built in. The control unit 122 also functions as a leakage determination unit 130, a leakage notification unit 132, and a cutoff control unit 134 described below.

  Based on the measurement result of the ammeter 118, for example, if the leakage current value of the ammeter 118 indicates 1 mA or more determined by law, the leakage determination unit 130 is within the range of the small output power generation facility 116 from the ammeter 118. Is determined to be leaking (the cause of the leak).

  Conventionally, an electrical leakage survey by a vendor of such a small output power generation facility 116 has been regularly performed (for example, once every four years) by a visitor of the investigator. If this happens, it will not be possible to cope with the sudden leakage that occurs between the investigations, and some of the leakages will repeatedly occur and recover depending on the state of the equipment. I had to wait for it to happen. In the present embodiment, since the leakage determination unit 130 determines that the leakage is automatically performed, the cause range of the leakage can be identified quickly and appropriately without any manual intervention, and as a result, safety can be improved. Is possible.

  In addition, leakage in the premises may occur only when the load facility 16 is operating or only when the small-output power generation facility 116 is generating power. In the present embodiment, the leakage determination unit 130 constantly monitors for leakage, so that leakage that occurs only when the load facility 16 or the small-output power generation facility 116 is in a specific state is not overlooked.

  In addition, in the above, the example in which the leakage determination unit 130 determines that the leakage is detected by detecting the leakage current value of 1 mA or more is not limited to this, but the leakage current value of the ammeter 118 is sequentially stored. Depending on the transition (trend) of the leakage current value, it can be determined that the range of the small output power generation facility 116 side from the ammeter 118 has a high risk of leakage.

  FIG. 2 is an explanatory diagram showing the transition of the measurement result of the ammeter 118. In FIG. 2, the leakage current value of the ammeter 118 tends to gradually increase from a predetermined timing. Here, the leakage determination unit 130 may cause the leakage current value to exceed 1 mA in the future due to the leakage current value exceeding a predetermined threshold (for example, 0.5 mA) lower than 1 mA. Judge that there is. In addition, the risk of leakage can be determined based on the waveform of the leakage current and the frequency of the leakage current, without being limited to the absolute amount of the leakage current value. In this way, it is possible to quickly identify the cause range of the electric leakage and further improve the safety.

  If leakage detecting section 132 determines that leakage determining section 130 has a leakage, it notifies the outside to that effect. For example, when a remote operation device (remote controller) for operating the small output power generation facility 116 is provided, information indicating leakage, for example, a warning character such as “leakage occurrence” is displayed on the display unit of the remote operation device. Or a warning sound indicating leakage may be output through a speaker. Further, when the small output power generation facility 116 is under the control of the HEMS (Home Energy Management System), the leakage notification unit 132 transmits a leakage signal to the HEMS, and the range on the small output generation facility 116 side from the ammeter 118 You may alert | report that it is the cause range of. The consumer can grasp that the range on the small output power generation facility 116 side from the ammeter 118 is the cause range of the electric leakage by using the warning character and the warning sound. Therefore, the customer can accurately grasp whether the cause of the electric leakage is within the range where the electric power company is obligated to investigate, or whether the electric power company is not obligated to carry out the investigation. In addition, it is possible to contact the distributor or repairer of the small output power generation facility 116.

  Further, when the leakage detection unit 132 determines that the leakage determination unit 130 has a leakage, in addition to or instead of notifying that the leakage has occurred through the remote control device, the small output power generation facility 116 is directly used. The information can be communicated to the vendors and repairers. For example, in response to a server managed by the vendor of the small output power generation facility 116 constantly monitoring the small output power generation facility 116 via the network and determining that the leakage determination unit 130 has a leakage, the leakage notification unit 132 notifies the server that there is a leakage. In this way, the investigation and refurbishment of the small output power generation facility 116 is quickly performed. At that time, the server managed by the vendor of the small-output power generation facility 116 may notify the consumer of this via communication means such as e-mail.

  When the interruption control unit 134 determines that the electric leakage determination unit 130 has an electric leakage, the interruption control unit 134 interrupts the energization of the distribution board 114 and the small output power generation facility 116 through the disconnection unit 120. Here, since the small output power generation facility 116 is connected to the disconnection unit 120, it is not easy to identify which part of the small output power generation facility 116 side of the disconnection unit 120 is leaking, but at least the solution Since the low-output power generation facility 116 side from the row portion 120 can be disconnected from the distribution board 114, it is possible to ensure the safety of the load facility 16 other than that.

  Further, if a shut-off unit (not shown) that cuts off the power supply between the small-output power generation facility 116 and the outside is provided integrally with the small-output power generation facility 116, the shut-off control unit 134 may If it is determined that 130 is leaking electricity, it is possible to cut off the power distribution between the distribution board 114 and the small-output power generation facility 116 through the blocking portion. Here, only the small output power generation facility 116 can be disconnected from the distribution board 114 by the interrupting unit. However, if the cause of the leakage is the small output power generation facility 116, the small output power generation facility 116 is disconnected and the small output power generation facility 116 is disconnected. It is possible to easily specify that the facility 116 is the cause of the electric leakage. Further, when the circuit breaker provided in each of the branch circuits 124 of the distribution board 114 can be operated from the outside, when the circuit breaker control unit 134 determines that the electric leakage determination unit 130 has an electric leakage, the circuit breaker for the wiring The power distribution between the distribution board 114 and the small output power generation facility 116 may be cut off.

(Second Embodiment)
In the above-described embodiment, an example in which one small output power generation facility 116 is connected to the distribution board 114 (one branch circuit 124) has been described. However, a plurality of small output power generation facilities may be provided on the customer's premises. In this case, the small output power generation facilities are connected to each of the different branch circuits 124 of the distribution board 114. In the second embodiment, an example in which a plurality (two in this case) of small output power generation facilities are connected to the distribution board 114 will be described.

  FIG. 3 is an explanatory diagram showing a connection relationship of the power system 200 in the second embodiment. The power system 200 includes a power meter 112, a distribution board 114, small output power generation facilities 116, 216 (first small output power generation facility, second small output power generation facility), and ammeters 118, 218 (first ammeter). , A second ammeter), disconnecting units 120 and 220, and a control unit 222. The power meter 112, the distribution board 114, the small output power generation facilities 116 and 216, the ammeters 118 and 218, and the disconnecting units 120 and 220 have already been described as components in the first embodiment. Since the functions are substantially the same, redundant description will be omitted, and the functional units (leakage determination unit 230, leakage notification unit 232, and interruption control unit 234) of the control unit 222 having different configurations will be mainly described. Also in the second embodiment, the electric power company replaces the small output power generation facilities 116 and 216 as the specific facilities (first specific facility and second specific facility) located in a range where the electric power company is not obliged to investigate. Two storage batteries (first storage battery and second storage battery), which are workpieces, can also be used.

  Based on the measurement results of the ammeter 118 and the ammeter 218, for example, if the ammeter 118 shows a leakage current value of 1 mA or more, the leakage determination unit 230 is closer to the small output power generation facility 116 than the ammeter 118. If it is determined that the range is leaking, and the ammeter 218 indicates a leakage current value of 1 mA or more, it is determined that the range on the small output power generation facility 216 side from the ammeter 218 is leaking. Here, it is possible to automatically determine the leakage of at least one of the plurality of ranges connected to the branch circuit by the single leakage determination unit 230, so that the cause range of the leakage can be quickly and appropriately determined without human intervention. Can be specified. Moreover, the leakage determination unit 230 constantly monitors all of the plurality of ranges, so that the leakage that occurs only when the load facility 16 and the low-output power generation facilities 116 and 216 are in a specific state is not overlooked. Furthermore, by using the transitions (trends) of the current values of the plurality of ammeters 118 and 218, the cause range of the electric leakage can be quickly identified, and the safety can be further improved.

  When leakage detection unit 232 determines that leakage determination unit 230 has a leakage, the fact and the cause range of leakage (the range on the small output power generation facility 116 side from ammeter 118, the small output generation facility from ammeter 218) 216 side range). The consumer can grasp which range is the cause of the electric leakage by the notification, and can contact the distributor of the small output power generation facilities 116 and 216 or a repairer for the investigation or the repair. .

  When the interruption control unit 234 determines that the electric leakage determination unit 230 has an electric leakage, the distribution panel 114 and the distribution panel 114 are connected through the disconnection unit (the disconnection unit 120 or the disconnection unit 220) connected to the range of the electric leakage. Shut off the power supply to the cause range of the electric leakage. In this way, since the low-output power generation facility 116 side from the disconnection unit 120 or the low-output power generation facility 216 side from the disconnection unit 220 can be disconnected from the distribution board 114, safety can be improved. .

  As described above, in the power systems 100 and 200 using the small output power generation facilities 116 and 216 by the power system 100 of the first embodiment and the power system 200 of the second embodiment described above, without human intervention, It is possible to quickly and appropriately identify the cause range of electric leakage.

  In addition, here, the general electric work for which the electric power company is obliged to investigate, connected to one of the plurality of branch circuits 124 in the distribution board 114 connected to the electric power system of the electric power company via the lead-in line. Is based on the measurement result of the ammeter 118, the ammeter 118 that measures the value of the leakage current that flows between the distribution board 114 and the small output power generator 116, and the ammeter 118. Either a small output power generation unit including a leakage determination unit 130 that determines whether or not there is a leakage, or a plurality of branch circuits in the distribution board 114 connected to a power system of an electric power company via a lead-in line A connected storage battery located in a range that does not include a general electric work for which the electric power company is obligated to investigate; a first ammeter that measures a leakage current value flowing between the distribution board and the storage battery; Energy storage unit and a determining leakage determination unit whether or not the leakage on the basis of 1 ammeter measurement results is also provided.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

  In the above-described embodiment, the entire range on the specific facility side starting from the distribution board, which is a range that does not include general electric works for which the electric power company is obligated to investigate by installing the specific facility. However, it was in the range where the electric power company was not obligated to investigate, and for example, an explanation was given by taking an example in which a distributor of a specific facility conducted an investigation. Here, the electric power company and the distributor of the specific equipment may be different corporations or the same corporation. If the power company and the seller of the specified equipment are the same corporation, the corporation is obligated to investigate the entire range of the specified equipment from the distribution board in the position of supplying electricity as the power company. Without (investigation), from the standpoint of the distributor of the specific equipment, the scope of the investigation will be conducted.

  INDUSTRIAL APPLICABILITY The present invention can be used for a power system, a small output power generation unit, and a power storage unit that can specify the cause range of electric leakage in a customer premises provided with a small output power generation facility or the like.

12 service line 14 power system 16 load facility 100, 200 power system 112 power meter 114 distribution board 116, 216 small output power generation facility (first small output power generation facility, second small output power generation facility)
118, 218 Ammeter (first ammeter, second ammeter)
120, 220 Disconnection unit 122, 222 Control unit 130, 230 Leakage determination unit 132, 232 Leakage notification unit 134, 234 Breaking control unit

Claims (7)

A power meter connected to the power system of the power company via a lead-in line;
A distribution board connected to the power meter;
A general electric work constructed by either the first small output power generation facility or the first storage battery connected to one of a plurality of branch circuits in the distribution board, the electric power company being obliged to investigate is included. A first specific facility located in a range that cannot be
A first ammeter for measuring a leakage current value flowing between the distribution board and the first specific equipment;
A leakage determination unit for determining whether or not a leakage has occurred based on a measurement result of the first ammeter;
An electric power system comprising: A disconnection unit that cuts off power to the distribution board and the first specific equipment;
When the leakage determination unit determines that there is a leakage, the disconnection control unit that cuts off the power distribution between the distribution board and the first specific equipment through the disconnection unit,
The power system according to claim 1, further comprising: A shut-off unit provided integrally with the first specific equipment, and shutting off the energization between the first specific equipment and the outside;
When the leakage determination unit determines that there is a leakage, a cutoff control unit that cuts off the power distribution between the distribution board and the first specific equipment through the cutoff unit;
The power system according to claim 1, further comprising:   The power system according to any one of claims 1 to 3, further comprising a leakage notification unit that notifies the outside when the leakage determination unit determines that there is a leakage. The distribution board is configured with either a second small output power generation facility or a second storage battery connected to a branch circuit different from the branch circuit to which the first specific facility is connected, and the power company is obliged to investigate A second specific facility located in a range not including a general electric work bearing
A second ammeter for measuring a leakage current value flowing between the distribution board and the second specific equipment;
Further comprising
The electric power system according to any one of claims 1 to 4, wherein the electric leakage determination unit determines electric leakage based on a measurement result of the second ammeter. In a range that does not include general electric works for which the electric power company is obliged to investigate, connected to any of a plurality of branch circuits in the distribution board connected to the electric power system of the electric power company via a lead-in line A small power generation facility located,
A first ammeter for measuring a leakage current value flowing between the distribution board and the small output power generation facility;
A leakage determination unit for determining whether or not a leakage has occurred based on a measurement result of the first ammeter;
A small output power generation unit comprising: In a range that does not include general electric works for which the electric power company is obliged to investigate, connected to any of a plurality of branch circuits in the distribution board connected to the electric power system of the electric power company via a lead-in line A storage battery located;
A first ammeter for measuring a leakage current value flowing between the distribution board and the storage battery;
A leakage determination unit for determining whether or not a leakage has occurred based on a measurement result of the first ammeter;
A power storage unit comprising:

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