JP2007328505A - Lease system for meter for selling electricity and lease method for meter for selling electricity - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lease system of a meter for selling electricity for reducing the labor of an electricity seller accompanied by the verification of a meter for selling electricity. <P>SOLUTION: A first server 2 for managing a meter 42 for selling electricity on lease and a meter 42 for selling electricity within a verification validity term on stand-by for lease is installed in a lease company L, and a second server 3 for managing a meter 43 for buying electricity installed in the house of an electricity seller 4 is installed in a power company E. The first server 2 detects the meter 42 for selling electricity on lease whose verification validity term approaches as the object of exchange, and receives the management information of the meter 43 for buying electricity from the second server 3, and selects the meter 42 for selling electricity whose verification validity term is close to the verification validity term of the meter 43 for buying electricity installed in the house of the electricity seller 4 of the meter 42 for selling electricity as the object of exchange from among the meters 42 for selling electricity on stand-by for lease, and exchanges the meter 42 for selling electricity with the meter 42 for selling electricity as the object of exchange. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a leasing system for a power sale meter (power meter for power sale) used for selling power generated by solar power generation and the like, and a leasing method for a power sale meter.

  In-house power generation such as solar power generation and wind power generation is widely used. For example, DC power generated by solar power generation is converted into AC power by an inverter, and this AC power covers the power consumed in the daytime. When the amount of power generated by solar power generation is greater than the self-consumption power and surplus power is generated, this surplus power can be sold to an electric power company. For this purpose, a service line connected to the distribution network of the electric power company is used, and a measuring instrument for selling electricity for photovoltaic power generation is connected to this service line. This power meter measures the amount of power that flows backward to the distribution network. The amount of power sold is calculated according to the number of instructions from the power meter, and the charge is based on the calculated power amount. Is paid to the installer of the photovoltaic power generation facility (power seller).

By the way, the meter for selling electricity has passed the test according to the legal provisions (Article 16 etc. of the Measurement Act), and if it is not within the valid period (for example, 10 years), it can be used for selling electricity. Can not. For this reason, the power seller must periodically receive the verification of the power meter. For example, in the case of car inspection of automobiles, there are various systems for performing vehicle inspection smoothly (see, for example, Patent Document 1), but no system has yet been established for the verification of power measuring instruments.
JP 2002-123596 A

  By the way, there are many cases where most of the power sellers have little knowledge about the certification, or are aware of the necessity of the certification, but are not familiar with the handling method. For this reason, even if the expiration date for the test is approaching, the power meter is not smoothly verified, and a reverse power flow using a power meter that has not been recertified occurs. There is. Moreover, since the meter for sale is removed from the service line during the verification, surplus power will not flow to the distribution network via the service line. That is, since a reverse power flow does not occur, the power seller cannot sell surplus power during the verification of the power meter. Furthermore, in order to receive a certification, work costs for removing and installing a power meter and a certification cost are required at one time, which is a heavy burden on the power seller.

  Therefore, an object of the present invention is to provide a power selling meter leasing system and a power selling meter leasing method capable of reducing the burden on the power seller accompanying the verification of the power selling meter.

In order to achieve the above object, an invention according to claim 1 is a leasing system for a power sale measuring instrument that lends a power sale measuring instrument for measuring a power sale amount to a power seller, A first server that manages a power measuring instrument and a power selling measuring instrument that is waiting for lending and is within the validity period of the certification, and the first server is a meter for power selling during lending that is close to the certification validity period. The power sale meter is detected and replaced with the power sale meter waiting for lending.
(Function)
When the expiry date of the power sale measuring instrument being rented approaches, it will be replaced, and will be replaced with another power sale measuring instrument within the validity period.

According to a second aspect of the present invention, in the leasing system according to the first aspect of the present invention, the lease system according to the first aspect includes a second server that manages a power purchase measuring instrument that is installed on the power seller side and measures a power purchase amount. When first lending the meter for power sale to a person, the first server receives management information of the meter for power purchase from the second server, and purchases power for the power seller. It is characterized in that a power selling measuring instrument having a verification expiration date close to the verification expiration date of the measuring device is selected from the power selling measuring devices waiting for loan and is to be lent.
(Function)
When lending a power sale meter for the first time, the first server selects and lends a power sale meter having a verification expiration date close to the verification expiration date of the power purchase meter. For this reason, it becomes possible to perform the verification of the measuring instrument for power sale at the same time as the latest verification of the measuring instrument for power purchase (the verification that comes in the nearest future). Furthermore, when the test cycle (validation valid period) of the power sale measuring instrument and the power purchase measuring instrument is the same, the next verification can be performed simultaneously.

According to a third aspect of the present invention, in the leasing system according to the first aspect of the present invention, the lease system according to the first aspect includes a second server that manages a power purchase measuring instrument that is installed on the power seller side and measures a power purchase amount. The server receives the management information of the electricity purchase meter from the second server, detects the electricity purchase meter whose expiry date is approaching, and sells the electricity meter where the electricity purchase meter is installed. It is characterized in that a power sale measuring instrument that is lent to an electric power supply is replaced with the power sale measuring instrument that is waiting for the loan.
(Function)
The meter for power sale that is being lent to the power seller of the meter for power purchase whose expiry date is approaching is set as the exchange target, and is replaced with another meter for power sale within the valid term of validity. In other words, it is possible to verify the power selling measuring instrument at the same time as verifying the power measuring instrument. Further, when the test cycle of the power sale meter and the power meter is the same, the next test can be performed at the same time.

According to a fourth aspect of the present invention, in the leasing system according to the first aspect of the present invention, the lease system according to the first aspect includes a second server that is installed on the power seller side and manages a power purchase measuring instrument that measures a power purchase amount. The server receives the management information of the electricity purchase meter from the second server, and validates the electricity purchase meter installed on the power seller side of the electricity sale meter to be replaced. A power sale meter that selects a power sale measuring instrument with an expiry date close to the expiration date from among the power sale measuring instruments awaiting lending, and lends the power sale measuring instrument in place of the replacement power sale measuring instrument. It is characterized by being a measuring instrument.
(Function)
When replacing a meter for power sale that is rented to a power seller, it will be replaced with a meter for power sale that has a verification expiration date close to the verification expiration date of the meter for purchase of the power seller. The verification time for the meter for power purchase is close to the verification time for the power meter. For this reason, it becomes possible to perform the verification of the electric power sale measuring instrument simultaneously with the verification of the electric power purchase measuring instrument. Further, when the test cycle of the power sale meter and the power meter is the same, the next test can be performed at the same time.

  The invention according to claim 5 is a method for leasing a power sale measuring instrument that lends to a power seller a power sale measuring instrument that measures the amount of power sold. The approach of the expiration date of the test is monitored, and when the expiration date of the verification is approached, another meter for selling power within the verification period is loaned in place of the meter for selling power on loan. It is said.

  The invention according to claim 6 is the leasing method according to claim 5, wherein the meter for selling electric power collected from the power seller and within the validity period of the certification is managed as a meter for selling electric power waiting for lending, When selling the power sale meter to the power seller, the meter for power sale having a verification expiration date close to the verification expiration date of the power purchase meter installed on the power seller side for measuring the amount of power purchase A meter is selected from the power sale measuring instruments awaiting lending, and the selected power sale measuring device is lent to the power seller.

  According to the first and fifth aspects of the invention, when the test expiration date of the power sale measuring instrument being rented is approached, it is replaced with another power sale measuring instrument within the verification validity period. A meter for selling electricity within the validity period of the certification will be loaned to the seller. Therefore, the power seller does not need to manage the certification expiry date, and since the power seller does not need to undergo certification, replacement work costs and certification costs are not needed at one time. Furthermore, since a meter for selling power is always installed (rented) within the validity period of the verification, there is no possibility that the power cannot be sold because of the verification. In this way, the burden on the power seller associated with the verification of the power meter is significantly reduced.

  According to the inventions described in claims 2 to 4, even when power is not sold (when there is no power meter), power metering is performed at the same time as verification of a power meter that is normally performed. Since it is possible to test the equipment, the burden on the power seller can be further reduced. In other words, in the past, a power outage was required for the verification of the meter for power purchase and the meter for power sale. , The burden on the power seller can be further reduced. In addition, since the replacement work can be performed at the same time, it is possible to reduce the lease fee while suppressing the work cost.

  According to the invention described in claim 6, since the measuring instrument for power sale collected from the power seller due to replacement or termination of the lease contract is lent to another power seller, Electric meter can be used efficiently. For this reason, it is possible to reduce the lease fee while minimizing the cost required for the verification. In addition, since the meter for selling electric power with the verification expiration date close to the verification expiration date of the meter for purchasing electricity installed on the other power sellers to be lent is loaned, the verification time of the meter for purchasing electricity And the verification time for power meter is close. For this reason, it becomes possible to perform the verification of the electric power sale measuring instrument simultaneously with the verification of the electric power purchase measuring instrument, thereby further reducing the burden on the electric power seller.

  The present invention will be described below based on the illustrated embodiments.

  FIG. 1 is a schematic configuration diagram of a leasing system 1 for a power sale measuring instrument according to an embodiment of the present invention. The leasing system 1 is a system that lends a power sale measuring instrument 42 to a power seller 4. The leasing system 1 mainly includes a first server 2 installed in a leasing company L and a second server installed in a power company E. The first server 2 and the second server 3 are communicably connected via a communication network N. In addition, a photovoltaic power generation facility 41, a power sale meter 42, and a power meter 43 are installed at the homes of the four power sellers.

  The leasing company L lends the power sale measuring instrument 42 to the power seller 4 and undertakes the business of exchanging the power purchase measuring instrument 43 on behalf of the power company E based on the contract with the power company E. Yes. That is, the power sale meter 42 is a watt hour meter that measures the amount of power flowing (reversely flowing) from the power seller 4 side to the power company E side (distribution network), that is, the power sale amount. It is owned and managed. The meter for power purchase 43 is a watt-hour meter that measures the amount of power flowing from the power company E side (distribution network) to the power seller 4 side, that is, the power purchase amount, and is owned and managed by the power company E. It is. The power meter 42 and the power meter 43 must be regularly certified by the legal regulations. The power meter 42 is certified by the leasing company L, and the power meter. The appliance 43 needs to be certified by the electric power company E. Then, the leasing company L is contracted by the power company E for the replacement work of the electricity purchase measuring instrument 43 accompanying the verification of the electricity purchase measuring instrument 43.

  The first server 2 is a server that manages the power sale measuring instrument 42 that is being lent to the power seller 4 and the power sale measuring instrument 42 that is waiting for the loan and within the validity period of the certification. And a loan waiting database 22.

  In the lending database 21, as shown in FIG. 2, for each measuring instrument ID (identification number) 211, the measuring instrument type 212, the previous verification date 213, the verification period 214, the verification expiration date 215, the contract number 216, the power sale A person name 217, a power seller address 218, a power seller contact address 219, and others 21a are stored. The measuring instrument type 212 stores the type of measuring instrument such as a low-pressure measuring instrument or a high-pressure measuring instrument, and the previous verification date 213 stores the date of the previous verification. The test cycle 214 stores the test cycle determined according to the type of the measuring instrument, that is, the test valid period, and the test valid period 215 stores the valid date of the previous test. The contract number 216 stores the contract number of the power seller 4 to whom the power sale measuring instrument 42 is lent, and this contract number is given from the power company E to the power seller 4 as a power consumer, As will be described later, the power seller 4 notifies the lease company L at the time of lease contract. The name of the power seller 4 is stored in the power seller name 217, the address of the home of the power seller 4 is stored in the power seller address 218, and the contact information 219 of the power seller is The telephone number and e-mail address of the power seller 4 are stored.

  As shown in FIG. 3, the loan waiting database 22 stores, for each measuring instrument ID (identification number) 221, a measuring instrument type 222, a previous test date 223, a test cycle 224, a test expiry date 225, and others 226. ing. The measuring instrument type 222 stores the type of measuring instrument, and the previous verification date 223 stores the date of the previous verification. The test cycle 224 stores a test cycle determined according to the type of the measuring instrument, that is, a test effective period, and the test expiration date 225 stores the previous test expiration date.

  The management information of the power sale measuring instrument 42 (meter ID) is stored and managed in the loaning database 21 or the loan waiting database 22. That is, during lending to the power seller 4, it is stored and managed in the lending database 21, and when it is collected from the power seller 4 due to exchange or termination of the lease contract, etc. Are stored and managed in the loan waiting database 22.

  On the other hand, the second server 3 is a server that manages the meter for power purchase 43 installed in the house of the power seller 4 and includes a power purchase meter database 31. As shown in FIG. 4, the power purchase meter database 31 includes, for each meter ID (identification number) 311, a meter type 312, a previous test date 313, a test cycle 314, a test expiration date 315, a contract number 316, A customer name 317, a customer address 318, a customer contact 319, and the other 31a are stored. The measuring instrument type 312 stores the type of measuring instrument such as a low-pressure measuring instrument or a high-pressure measuring instrument, and the previous verification date 313 stores the date of the previous verification. The test cycle 314 stores the test cycle determined according to the type of the measuring instrument, that is, the test effective period, and the test expiration date 315 stores the valid date of the previous test. The contract number 316 stores the contract number given by the electric power company E to the power consumer (power seller 4) where the meter for power purchase 43 is installed, and the consumer name 317 includes The name of the customer is stored. The customer address 318 stores the address of the customer's house, and the customer contact information 319 stores the customer's telephone number, e-mail address, and the like.

  Further, as will be described later, the first server 2 is lending the selection function (program) for selecting the power sale measuring instrument 42 to be lent to the power seller 4 from the loan waiting database 22 and the examination expiration date approaching. And a detection function (program) for detecting the power sale meter 42 and the power meter 43. The selection function is provided when the power sale meter 42 is first lent to the power seller 4 and when another power sale meter 42 is rented in place of the rented power sale meter 42. The power sale measuring instrument 42 to be selected is selected. Specifically, the power purchase meter database 31 of the second server 3 is accessed to receive the management information of the power purchase meter 43, and the power purchase meter 43 installed in the home of the power seller 4 The power sale measuring instrument 42 having the verification expiration date close to the verification expiration date is selected from the loan waiting database 22. The detection function accesses the electricity purchase meter database 31 and periodically detects the power sale meter 42 and the electricity purchase meter 43 that have approached the expiration date from the loaned database 21 and the electricity purchase meter database 31. Is.

  Next, the processing operation of the leasing system 1 for a power sale measuring instrument having such a configuration will be described based on the flowchart shown in FIG.

  First, the power seller 4 accesses the first server 2 of the leasing company L via the inner net or the like, inputs the contract number given by the power company E, and leases the meter for selling power 42. Is applied (step S1), the first server 2 selects from the loan-waiting database 22 a power sale meter 42 to be loaned to the power seller 4 first (step S2). That is, the power purchase meter database 31 of the second server 3 is accessed, and the test expiration date (the test expiration date 315) of the power purchase meter 43 (the meter ID 311) corresponding to the contract number (contract number 316). To get. Next, the measuring instrument ID 221 having the verification expiration date (validation expiration date 225) close to the verification expiration date is searched from the loan waiting database 22. Then, the power sale meter 42 with the selected meter ID 221 is lent to the power seller 4 (step S3).

  Subsequently, the first server 2 periodically detects, for example, every day, the meter for power sale 42 and the meter for power purchase 43 that are being rented and whose test expiration date approaches (step S4). Here, it is assumed that the power sale measuring instrument 42 and the power purchase measuring instrument 43 that are six months before the expiration date of the verification are detected. Specifically, the measuring server ID 211 of the certification expiry date (certification expiry date 215) corresponding to the date obtained by adding six months to the date (detection date) is detected from the loaning database 21, and the second server 3, the measuring instrument ID 311 of the verification expiration date (the verification expiration date 315) corresponding to the date is detected from the power purchase meter database 31.

  As a result, in the same power seller 4 / customer, when the expiration date of the test only for the power sale measuring instrument 42 is approaching (case 1), the power sale measurement is performed for the power seller 4 concerned. Notification is made that the device 42 needs to be replaced (step S5), and another power sale measuring device 42 to be lent in place of the loaned power sale measuring device 42 is selected from the loan waiting database 22 (step S5). S6). That is, in the same manner as in step S2, the power sale measuring instrument 42 (meter ID 221) having an expiration date close to the verification expiration date of the measuring instrument 43 for power purchase installed in the power seller 4's house is provided. Selection is made from the loan waiting database 22. Then, the selected power sale meter 42 is lent in place of the rented power sale meter 42 (step S7). That is, the power sale measuring instrument 42 is exchanged and lent. The date of replacement can be specified by the power seller 4 in both cases 2 and 3 described later.

  Also, in the same power seller 4 / customer, when the expiration date of the test only for the power purchaser 43 is approaching (Case 2), the meter for power purchase is sent to the seller 4 concerned. 43 is informed that it is necessary to replace (verify) 43, and inquires whether or not it is desired to simultaneously replace the power sale measuring instrument 42 (step S8). On the other hand, when a reply is received from the power seller 4 (step S9) and simultaneous exchange is desired (“Y” in step S10), the loan is performed in place of the lending meter 42 for lending. Another power sale measuring instrument 42 to be selected is selected from the loan waiting database 22 (step S11). Here, the meter for purchase of electricity 43 being installed is replaced with a new meter for purchase of electricity 43, that is, a meter for purchase of electricity with an updated verification expiration date, so that it is close to the updated verification expiration date. The power sale measuring instrument 42 having the certification expiration date, for example, the most recently tested power sale measuring instrument 42 is selected from the loan waiting database 22. Then, the power purchase measuring instrument 43 is replaced with a new power purchase measuring instrument 43, and the selected power sale measuring instrument 42 is lent in place of the rented power selling measuring instrument 42 (step S12). Further, since the power sale measuring instrument 42 previously lent is collected by the lease company L and is within the validity period of the certification, as described above, the loan waiting database 22 as the power sale measuring instrument 4 waiting for lending. Is stored and managed. On the other hand, when simultaneous exchange is not desired (in the case of “N” in step S10), only the meter for power purchase 43 is exchanged (step S13).

  Furthermore, in the same power seller 4 / customer, when the expiration date of the verification of power meter 42 and power meter 43 is close (case 3), The power meter 42 and the power meter 43 are notified that the power meter 42 and the power meter 43 need to be replaced (step S14), and another power meter that lends in place of the power meter 42 that is lent. The device 42 is selected from the loan waiting database 22 (step S15). Here, the meter for purchase of electricity 43 being installed is replaced with a new meter for purchase of electricity 43, that is, a meter for purchase of electricity with an updated verification expiration date, so that it is close to the updated verification expiration date. The power sale measuring instrument 42 having the certification expiration date, for example, the most recently tested power sale measuring instrument 42 is selected from the loan waiting database 22. Then, the meter for power purchase 43 is exchanged, and the selected meter for power sale 42 is loaned in place of the meter for power sale 42 being lent (step S16).

  On the other hand, the first server 2 manages the expiration date of verification of the power sale meter 4 waiting for lending stored in the lending wait database 22 in the same manner as in step S4. That is, periodically, the power sale measuring instrument 42 (meter ID 221) whose expiry date is approaching is detected, and the power sale measuring instrument 42 is tested. As a result, it is possible to always lend the power sale measuring instrument 42 within the validity period of the certification.

  As described above, according to the leasing system 1 and the leasing method for the power sale measuring instrument, when the test expiration date of the power sale measuring instrument 42 that is being lent is approaching, another meter for power sale within the verification validity period. Since it is exchanged for the device 42, the power sale measuring device 42 is always lent and installed within the certification valid period. Accordingly, the power seller 4 does not need to manage the certification expiration date, and the power seller 4 does not need to undergo the certification, so that no replacement work cost or certification cost is required at one time. Furthermore, since the electric power sale measuring instrument 42 is always installed within the verification valid period, a situation in which the electric power cannot be sold because the verification is in progress does not occur. In this manner, the burden on the power seller 4 associated with the verification of the power sale measuring instrument 42 is remarkably reduced.

  In addition, as described above, when the power sale measuring instrument 42 is lent for the first time, the power sale measuring instrument having a verification expiration date that is close to the verification expiration date of the power purchase measuring instrument 43 of the power seller 4 to be loaned. Device 42 is selected and loaned. For this reason, it becomes possible to carry out the verification of the electric power sale measuring instrument 42 simultaneously with the latest verification of the electric power purchase measuring instrument 43 (the verification coming in the nearest future). Further, when the power sale measuring instrument 42 which is lent to the power seller 4 is exchanged, the power sale measuring instrument having a verification expiration date close to the verification expiration date of the power purchase measuring device 43 of the power seller 4. Therefore, the verification time of the meter for purchase 43 is close to the verification time of the meter for power sale. For this reason, it becomes possible to carry out the verification of the electric power sale measuring instrument 42 simultaneously with the verification of the electric power purchase measuring instrument 43. If the test cycle of the power meter 42 and the power meter 43 is the same, the next test can be performed at the same time (as in case 3 above) and the test is valid. The measuring instruments 42 and 43 within the period can be fully utilized. That is, it is possible to reduce the situation in which only the verification expiration date of the meter for power purchase 43 has approached, and therefore the power sale measuring meter 42 whose verification expiration date has not approached must also be replaced.

  Furthermore, when the power seller 4 desires, the power sale meter 42 that is lent to the power seller 4 of the power meter 43 for power purchase whose expiry date is approaching is also replaced. For this reason, even if the meter for power purchase 43 is changed or replaced due to a change in capacity or the like, the meter for power sale 42 can be verified simultaneously with the test for the meter for power purchase 43. .

  In this way, even when not selling power (when not having a meter for selling power 42), the meter for selling power 42 is verified at the same time as testing for the meter 43 for buying electricity normally performed. Therefore, the burden on the power seller 4 can be further reduced. That is, in the past, a power failure was required for the verification of the power meter 43 and the power meter 42. However, since the replacement of the meters 42 and 43 accompanying the verification can be performed simultaneously, 1 The power outage can be further reduced by the power outage. In addition, since the replacement work can be performed at the same time, it is possible to reduce the lease fee while suppressing the work cost.

  Further, since the power sale measuring instrument 42 collected from the power seller 4 due to the exchange or the termination of the lease contract is lent to another power seller 4, the power sale measuring instrument 42 within the valid period of the certification is used. It can be used efficiently, that is, it can be used effectively. For this reason, it is possible to reduce the lease fee while minimizing the cost required for the verification.

  Although the embodiment of the present invention has been described above, the specific configuration is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention, the present invention is not limited to this embodiment. include. For example, in this embodiment, the leasing company L and the power company E are separate companies. For example, the power company E may perform the leasing business. In this case, the first server 2 and the second power company E A server with one server 3 may be installed in the electric power company E. Further, in this embodiment, it is assumed that the power seller 4 is a consumer of the electric power company E, but it is needless to say that it may not be a consumer.

It is a schematic block diagram of the lease system of the meter for electric power sales which concerns on embodiment of this invention. It is a data block diagram of the database during loan in the lease system of FIG. FIG. 2 is a data configuration diagram of a loan waiting database in the lease system of FIG. 1. It is a data block diagram of the electricity purchase meter database in the lease system of FIG. It is a flowchart which shows the processing operation of the lease system of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Leasing system of meter for electric power sale 2 First server 21 Database in loan 22 Database waiting for loan 3 Second server 31 Electric power purchase meter database 4 Electric power seller 41 Solar power generation equipment 42 Electric power meter 43 Electric power purchase Meter L Leasing company E Electric power company N Communication network

Claims (6)

A leasing system for a power sale meter that lends a power meter for measuring the amount of power sold to a power seller,
A first server that manages a power sale measuring instrument that is being lent and a power sale measuring instrument that is waiting for lending and within the validity period of the certification;
The first server detects the loaned power sale measuring instrument that is approaching the expiry date of the test, and replaces the power sale weighing instrument with the power sale weighing instrument waiting for loan. A leasing system for measuring instruments for electric power sales. A second server that manages a meter for power purchase that is installed on the power seller side and measures the amount of power purchased;
When lending the power sale meter to the power seller for the first time, the first server receives management information of the power meter from the second server, and 2. A power selling measuring instrument having a verification expiration date close to a verification expiration date of a power purchase measuring device is selected from the power distribution measuring devices awaiting lending and is loaned. A metering system for selling electricity as described in 1. A second server that manages a meter for power purchase that is installed on the power seller side and measures the amount of power purchased;
The first server receives the management information on the meter for power purchase from the second server, detects the meter for power purchase whose test expiration date is approaching, and the meter for power purchase is installed. The lease for a power sale measuring instrument according to claim 1, wherein a power sale measuring instrument that is lent to a current power seller is to be replaced with the power sale measuring instrument that is waiting for the loan. system. A second server that manages a meter for power purchase that is installed on the power seller side and measures the amount of power purchased;
The first server receives management information of the power purchase measuring instrument from the second server and is installed on the power seller side of the replacement power sale measuring instrument. Select a power sale measuring instrument that has an expiration date close to the verification expiration date from the power sale measuring instruments awaiting lending, and lend the power selling measuring instrument in place of the replacement power selling measuring instrument. 2. The leasing system for a power sale meter according to claim 1, wherein the power sale meter is a power meter. A method of leasing a power sale measuring instrument that lends a power sale measuring instrument that measures the amount of power sold to a power seller,
Monitor the approaching expiration date of the meter for power sale that is being rented to the power seller, and if the expiration date for the meter is approaching, it will replace the meter for power sale that is being rented. A method for leasing a meter for selling electric power, characterized by renting a meter for selling electric power. A power sale measuring instrument collected from the power seller and within the validity period of the certification is managed as a power sale measuring instrument awaiting loan, and when the power sale meter is lent to the power seller, Select a power selling measuring instrument that has a verification expiration date close to the verification expiration date of the power purchase measuring instrument installed on the power source side to measure the amount of power purchased. The method for leasing a power meter according to claim 5, wherein a power meter is lent to the power seller.

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