JP6836701B2

JP6836701B2 - Power asset management system and power asset management method

Info

Publication number: JP6836701B2
Application number: JP2019136479A
Authority: JP
Inventors: 辰之岩崎
Original assignee: EPCO Ltd
Current assignee: EPCO Ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2021-03-03
Anticipated expiration: 2039-07-05
Also published as: JP2021013288A

Description

本発明は、電力アセット管理システムおよび電力アセット管理方法に関する。 The present invention relates to a power asset management system and a power asset management method.

再生可能エネルギーによる発電の普及を主目的として施行された、固定価格買取制度（いわゆるＦＩＴ）により、太陽光発電システム等の導入は大幅に増加した。一方、この制度における買取期間が満了する家庭、すなわち卒ＦＩＴ世帯も生じ始めており、電気事業者各社として、各家庭で生じた余剰電力の買い取り価格の提示も行われている。つまり、卒ＦＩＴ商戦が本格化している。
こうした卒ＦＩＴにより生じる余剰電力の使途は、主に２通り想定される。すなわち、小売電気事業者への売電、または、自宅に設置した蓄電設備（例：昼間運転型エコキュート、蓄電池）または電気自動車への蓄電による自家消費、である。
こうした余剰電力の管理等に関する従来技術としては、例えば、簡素な構成で、事業者と複数の需要家との間で電力を売買する際の不公平感を低減するとの目的の下、複数の需要家からなる需要家集合体が有する複数の電源装置と、前記複数の電源装置から前記需要家集合体とは別の事業者に売却される電力をそれぞれ検出する第一売電検出部と、前記複数の需要家が前記事業者から購入する電力をそれぞれ検出する第一買電検出部と、を具備する電力供給システム（特許文献１参照）などが提案されている。
また、余剰電力が無駄に消費されることを防止可能なエネルギー管理システムを提供するとの目的の下、燃料電池と、この燃料電池からの直流電圧を交流電圧に変換するインバータと、蓄電池とを備える建物におけるエネルギーデマンドを予測する予測部と、前記燃料電池、前記インバータおよび前記蓄電池の運転スケジュールを、前記予測されたエネルギーデマンドに基づいて、前記建物におけるエネルギー収支の関数を適合度とする最適化計算により計算する計算部と、前記計算された運転スケジュールに基づいて、前記燃料電池と、前記インバータと、前記蓄電池を制御する制御部を具備する、エネルギー管理システム特許文献２参照）なども提案されている。The introduction of solar power generation systems, etc. has increased significantly due to the feed-in tariff (so-called FIT), which was enforced with the main purpose of popularizing power generation using renewable energy. On the other hand, some households whose purchase period under this system has expired, that is, graduated FIT households, are beginning to appear, and electric power companies are also presenting the purchase price of surplus electricity generated in each household. In other words, the graduate FIT sales battle is in full swing.
There are two main uses for the surplus electricity generated by such graduation FIT. That is, selling electricity to a retail electric power company, or self-consumption by storing electricity in a power storage facility (eg, daytime operation type EcoCute, storage battery) installed at home or in an electric vehicle.
As a conventional technique for managing such surplus electric power, for example, a plurality of demands are used for the purpose of reducing unfairness when buying and selling electric power between a business operator and a plurality of consumers with a simple configuration. A plurality of power supply devices of a consumer aggregate consisting of a house, a first power sale detection unit that detects electric power sold from the plurality of power supply devices to a business operator different from the consumer aggregate, and the above-mentioned A power supply system (see Patent Document 1) including a first power purchase detection unit that detects power purchased by a plurality of consumers from the business operator has been proposed.
Further, for the purpose of providing an energy management system capable of preventing excess power from being wasted, a fuel cell, an inverter that converts a DC voltage from the fuel cell into an AC voltage, and a storage battery are provided. Optimization calculation of the prediction unit that predicts the energy demand in the building and the operation schedule of the fuel cell, the inverter, and the storage battery with the function of the energy balance in the building as the degree of conformity based on the predicted energy demand. (Refer to Patent Document 2 of the energy management system, which includes a fuel cell, an inverter, and a control unit for controlling the storage battery based on the calculated operation schedule) has also been proposed. There is.

特開２０１７−１６３７４６号公報JP-A-2017-163746 特開２０１７−２２９２３３号公報JP-A-2017-229233

一方で、上述の蓄電対象である電気自動車は、自動車産業やＩＴ産業における急速な開発に伴い、次世代自動車として市場浸透が進んでいる。つまり、こうした電気自動車を蓄電対象として採用するケースは今後増えていくものと見込まれる。
ここであらためて、再生可能エネルギーの余剰電力の蓄電対象を、電気自動車とした場合のメリットを示すと、１．電気自動車の走行に必要な電力を補える（走行用電気代の削減）、２．電気自動車増に伴い増大する電力需要を抑制、３．再生可能エネルギーでの発電量増加による需給バランス悪化を抑制（系統への負荷低減）、４．低炭素社会への貢献（ガソリン車・ディーゼル車の削減に伴う化石燃料の消費抑制）、５．電気自動車を非常用電源として利用可能、といったものがあげられる。
では、そうした多くのメリットがある電気自動車を、卒ＦＩＴ世帯が購入し、例えば、家庭用太陽光発電システムで生じた余剰電力を、当該電気自動車にて蓄電するとすれば、別の観点で課題が生じ、電気自動車導入を妨げる結果となる。
こうした課題とは、１．電気自動車の使用時（自宅から電気自動車で外出するケース）の余剰電力は、小売電気事業者が定めた安価な買取単価で売電することなり、経済的メリットを享受しにくい、２．外出先での電気自動車の充電（例：スーパーや駐車場などでの充電）は、上述の買取単価よりも高い市場価格（販売単価）で買電した電力で行われ、自宅で充電するよりも高コスト化する、といったものになる。
上記課題を解決せずに、余剰電力を外部装置に充電すなわち売電すると共に、そうした外部装置から、必要に応じてユーザ都合のタイミングで買電し、自らの電気自動車に充電する、という運用を行えば、当該ユーザは経済的メリットを得る機会やその程度が低いか、或いは経済的にはマイナスとなる恐れもある。
また、そのような運用を行うためには、各ユーザや小売電気事業者、街中の充電設備といった各プレイヤーを一元管理し、各電気自動車の売電／買電の情報を集約管理する必要もでてくる。そうなると、当該運用を担う事業者等と契約する／できる者のみが参加できる、排他的で中央集権的な環境が生じかねない。電気自動車を蓄電対象として導入し、再生可能エネルギーにより生まれた余剰電力の蓄電や利用を、低コストで幅広く促進することは困難になる。
そこで本発明の目的は、再生可能エネルギーに起因する余剰電力の効率的な利用を、電気自動車を通じて低コストに促進可能とする技術を提供することにある。On the other hand, the electric vehicle, which is the target of electricity storage, has been widely used as a next-generation vehicle due to rapid development in the automobile industry and the IT industry. In other words, it is expected that the number of cases in which such electric vehicles are used as storage targets will increase in the future.
Here, the merits of using an electric vehicle as the storage target for the surplus power of renewable energy will be shown as follows. 2. Supplement the electric power required to drive an electric vehicle (reduce the electricity bill for driving). 2. Suppress the increasing demand for electric power due to the increase in electric vehicles. 3. Suppress the deterioration of the supply-demand balance due to the increase in power generation from renewable energy (reduce the load on the grid). Contribution to a low-carbon society (reduction of fossil fuel consumption due to reduction of gasoline and diesel vehicles) 5. Electric vehicles can be used as an emergency power source.
Then, if an electric vehicle having such many merits is purchased by a graduate FIT household and, for example, the surplus electric power generated by the home photovoltaic power generation system is stored in the electric vehicle, there is a problem from another viewpoint. As a result, it hinders the introduction of electric vehicles.
These issues are: 1. When using an electric vehicle (when going out from home with an electric vehicle), the surplus electricity will be sold at a low purchase unit price set by the retail electric power company, and it is difficult to enjoy the economic benefits. Charging an electric vehicle on the go (eg charging at a supermarket or parking lot) is done with electricity purchased at a market price (sales unit price) higher than the above-mentioned purchase unit price, rather than charging at home. The cost will increase.
Without solving the above problems, the surplus power is charged to an external device, that is, sold, and the power is purchased from such an external device at the user's convenience as needed to charge its own electric vehicle. If done, the user may have a low or low level of financial benefit, or may be economically negative.
In addition, in order to perform such an operation, it is necessary to centrally manage each player such as each user, retail electric power company, and charging equipment in the city, and centrally manage information on power sales / purchase of each electric vehicle. Come on. In that case, an exclusive and centralized environment may be created in which only those who can / can contract with the business operator responsible for the operation can participate. It will be difficult to introduce electric vehicles as storage targets and widely promote the storage and utilization of surplus electricity generated by renewable energy at low cost.
Therefore, an object of the present invention is to provide a technique capable of promoting efficient use of surplus electric power caused by renewable energy at low cost through an electric vehicle.

上記課題を解決する本発明の電力アセット管理システムは、所定施設における発電量のうち系統への売電分の値に、所定アルゴリズムを適用して正の電力資産の情報を生成し、前記施設の電気自動車に付帯する又は前記電気自動車のユーザが保持する記憶装置に格納する処理と、前記施設以外の別施設にて前記電気自動車に充電した買電量の値に、所定アルゴリズムを適用して負の電力資産の情報を生成し、前記記憶装置に格納する処理と、前記正および前記負の各電力資産の間で相殺処理を行って電力純資産の情報を生成し、当該電力純資産の情報を前記記憶装置に格納する処理と、を実行する演算装置を備えた情報処理装置、を含むことを特徴とする。
また、上述の電力アセット管理システムにおいて、前記演算装置は、前記電気自動車が前記別施設で充電を受ける場合、前記記憶装置で保持する正の電力資産の情報または前記電力純資産の情報を決済資金として前記充電のための充電料金に充当する処理を更に実行し、前記充当の処理により減算された前記電力資産の値に前記アルゴリズムを適用して、新たな正または負の電力資産の情報を生成し、前記記憶装置に格納するものである、としてもよい。
また、上述の電力アセット管理システムにおいて、前記演算装置は、前記アルゴリズムとして、予め定めた又は所定事業者から取得した、前記施設からの電力の買取単価および前記別施設での充電に伴う充電単価に基づいて、前記施設からの売電金額および前記別施設での充電電力の買電金額を算定し、当該算定で得た金額の値に前記アルゴリズムを適用することで、電力資産の情報を生成するものである、としてもよい。
また、上述の電力アセット管理システムにおいて、前記演算装置は、前記売電分の電力の買取先と前記電気自動車への充電用電力の売電元が異なる事業者である場合、前記アルゴリズムとして、前記買取先の事業者から取得した買取単価に基づいて、前記売電分の電力の買取金額を算定し、当該算定で得た買取金額の値に前記アルゴリズムを適用することで、前記正の電力資産の情報を生成し、前記売電元の事業者から取得した充電単価に基づいて、前記充電電力の買電金額を算定し、当該算定で得た買電金額の値に前記アルゴリズムを適用することで、前記負の電力資産の情報を生成するものである、としてもよい。
また、上述の電力アセット管理システムにおいて、前記演算装置は、前記電力純資産の値が負の値である場合、電力資産の貸付情報として出力するものである、としてもよい。
また、上述の電力アセット管理システムにおいて、前記演算装置は、前記施設ないし前記電気自動車が、前記別施設ないし他の電気自動車に対する充電を行った場合、当該充電量に前記アルゴリズムを適用して、前記正の電力資産の情報を生成し、前記記憶装置に格納し、前記電気自動車が他の電気自動車から充電を受けた場合、当該充電量に前記アルゴリズムを適用して、前記負の電力資産の情報を生成し、前記記憶装置に格納するものである、としてもよい。
また、本発明の電力アセット管理方法は、情報処理装置が、所定施設における発電量のうち系統への売電分の値に、所定アルゴリズムを適用して正の電力資産の情報を生成し、前記施設の電気自動車に付帯する又は前記電気自動車のユーザが保持する記憶装置に格納する処理と、前記施設以外の別施設にて前記電気自動車に充電した買電量の値に、所定アルゴリズムを適用して負の電力資産の情報を生成し、前記記憶装置に格納する処理と、前記正および前記負の各電力資産の間で相殺処理を行って電力純資産の情報を生成し、当該電力純資産の情報を前記記憶装置に格納する処理と、を実行することを特徴とする。
また、本発明の電力アセット管理方法において、前記情報処理装置が、前記電気自動車が前記別施設で充電を受ける場合、前記記憶装置で保持する正の電力資産の情報または前記電力純資産の情報を決済資金として前記充電のための充電料金に充当する処理を更に実行し、前記充当の処理により減算された前記電力資産の値に前記アルゴリズムを適用して、新たな正または負の電力資産の情報を生成し、前記記憶装置に格納する、としてもよい。
また、本発明の電力アセット管理方法において、前記情報処理装置が、前記アルゴリズムとして、予め定めた又は所定事業者から取得した、前記施設からの電力の買取単価および前記別施設での充電に伴う充電単価に基づいて、前記施設からの売電金額および前記別施設での充電電力の買電金額を算定し、当該算定で得た金額の値に前記アルゴリズムを適用することで、電力資産の情報を生成する、としてもよい。
また、本発明の電力アセット管理方法において、前記情報処理装置が、前記売電分の電力の買取先と前記電気自動車への充電用電力の売電元が異なる事業者である場合、前記アルゴリズムとして、前記買取先の事業者から取得した買取単価に基づいて、前記売電分の電力の買取金額を算定し、当該算定で得た買取金額の値に前記アルゴリズムを適用することで、前記正の電力資産の情報を生成し、前記売電元の事業者から取得した充電単価に基づいて、前記充電電力の買電金額を算定し、当該算定で得た買電金額の値に前記アルゴリズムを適用することで、前記負の電力資産の情報を生成する、としてもよい。
また、本発明の電力アセット管理方法において、前記情報処理装置が、前記電力純資産の値が負の値である場合、電力資産の貸付情報として出力する、としてもよい。
また、本発明の電力アセット管理方法において、情報処理装置が、前記施設ないし前記電気自動車が、前記別施設ないし他の電気自動車に対する充電を行った場合、当該充電量に前記アルゴリズムを適用して、前記正の電力資産の情報を生成し、前記記憶装置に格納し、前記電気自動車が他の電気自動車から充電を受けた場合、当該充電量に前記アルゴリズムを適用して、前記負の電力資産の情報を生成し、前記記憶装置に格納する、としてもよい。The electric power asset management system of the present invention that solves the above problems applies a predetermined algorithm to the value of the amount of power generated in a predetermined facility and sells electricity to the grid to generate positive power asset information, and generates information on the positive electric power asset of the facility. A predetermined algorithm is applied to the value of the amount of power purchased incidental to the electric vehicle or stored in the storage device held by the user of the electric vehicle and the amount of power purchased in the electric vehicle at another facility other than the facility, and is negative. The process of generating the information of the electric power asset and storing it in the storage device and the offset processing between the positive and negative electric power assets are performed to generate the information of the electric power net asset, and the information of the electric power net asset is stored in the storage. It is characterized by including a process stored in the device and an information processing device including an arithmetic device for executing the process.
Further, in the above-mentioned electric power asset management system, when the electric vehicle is charged at the other facility, the arithmetic unit uses the information of the positive electric power asset held in the storage device or the information of the net electric power as the settlement fund. The process of appropriating the charging charge for charging is further executed, and the algorithm is applied to the value of the power asset subtracted by the appropriation process to generate new positive or negative power asset information. , It may be stored in the storage device.
Further, in the above-mentioned electric power asset management system, the arithmetic device uses the algorithm as the unit price for purchasing electric power from the facility and the unit price for charging the electric power at the other facility, which is predetermined or acquired from a predetermined business operator. Based on this, the amount of electricity sold from the facility and the amount of electricity purchased at the other facility are calculated, and the algorithm is applied to the value of the amount obtained in the calculation to generate information on electric power assets. It may be a thing.
Further, in the above-mentioned electric power asset management system, when the calculation device is a business operator whose purchase destination of the electric power for the sale of electric power and the electric power sale source of the electric power for charging to the electric vehicle are different, the above-mentioned algorithm is used. The positive power asset is calculated by calculating the purchase price of electricity for the electricity sold based on the purchase unit price obtained from the purchaser, and applying the algorithm to the value of the purchase price obtained in the calculation. The above information is generated, the purchase price of the charging power is calculated based on the charging unit price obtained from the business operator of the power selling source, and the algorithm is applied to the value of the power purchase price obtained by the calculation. It may be said that the information of the negative electric power asset is generated.
Further, in the above-mentioned electric power asset management system, when the value of the electric power net asset is a negative value, the arithmetic unit may output as loan information of the electric power asset.
Further, in the above-mentioned electric power asset management system, when the facility or the electric vehicle charges the other facility or another electric vehicle, the arithmetic device applies the algorithm to the charge amount to obtain the above-mentioned. When positive power asset information is generated and stored in the storage device and the electric vehicle is charged by another electric vehicle, the algorithm is applied to the charge amount to apply the negative power asset information. May be generated and stored in the storage device.
Further, in the power asset management method of the present invention, the information processing apparatus applies a predetermined algorithm to the value of the amount of power sold to the grid among the amount of power generated in the predetermined facility to generate positive power asset information. A predetermined algorithm is applied to the process of being attached to the electric vehicle of the facility or stored in the storage device held by the user of the electric vehicle and the value of the amount of electricity purchased for charging the electric vehicle at another facility other than the facility. The process of generating the information of the negative electric power asset and storing it in the storage device and the offset processing between the positive and the negative electric power assets are performed to generate the information of the net electric power asset, and the information of the net electric power asset is obtained. It is characterized by executing the process of storing in the storage device.
Further, in the electric power asset management method of the present invention, when the electric vehicle is charged at the other facility, the information processing device settles the positive electric power asset information or the electric power net asset information held by the storage device. The process of allocating the charge to the charge for charging as funds is further executed, and the algorithm is applied to the value of the electric power asset subtracted by the process of allocation to obtain new positive or negative electric power asset information. It may be generated and stored in the storage device.
Further, in the electric power asset management method of the present invention, the information processing apparatus purchases electric power from the facility and charges associated with charging at the other facility, which is predetermined as the algorithm or acquired from a predetermined business operator. Based on the unit price, the amount of electricity sold from the facility and the amount of electricity purchased at the other facility are calculated, and the algorithm is applied to the value of the amount obtained in the calculation to obtain information on electric power assets. It may be generated.
Further, in the electric power asset management method of the present invention, when the information processing device is a business operator whose purchase destination of the electric power for the sale of electric power and the electric power sale source of the electric power for charging to the electric vehicle are different, the algorithm is used. By calculating the purchase price of the electricity for the sale of electricity based on the purchase unit price obtained from the business of the purchase destination and applying the algorithm to the value of the purchase price obtained by the calculation, the positive Generates information on electric power assets, calculates the purchase price of the charged power based on the charge unit price obtained from the business operator of the power seller, and applies the algorithm to the value of the power purchase price obtained in the calculation. By doing so, the information on the negative electric power assets may be generated.
Further, in the electric power asset management method of the present invention, when the value of the electric power net asset is a negative value, the information processing apparatus may output as loan information of the electric power asset.
Further, in the power asset management method of the present invention, when the information processing device charges the facility or the electric vehicle to the other facility or another electric vehicle, the algorithm is applied to the charge amount. When the information of the positive electric power asset is generated and stored in the storage device, and the electric vehicle is charged by another electric vehicle, the algorithm is applied to the charge amount of the negative electric power asset. Information may be generated and stored in the storage device.

本発明によれば、再生可能エネルギーに起因する余剰電力の効率的な利用を、電気自動車を通じて低コストに促進可能となる。 According to the present invention, efficient use of surplus electric power due to renewable energy can be promoted at low cost through an electric vehicle.

本実施形態の電力アセット管理システムの構成例を示す図である。It is a figure which shows the configuration example of the electric power asset management system of this embodiment. 本実施形態におけるアセット管理ＤＢの構成例を示す図である。It is a figure which shows the configuration example of the asset management DB in this embodiment. 本実施形態における電力純資産情報の構成例を示す図である。It is a figure which shows the composition example of the electric power net asset information in this embodiment. 本実施形態における売買管理情報の構成例を示す図である。It is a figure which shows the structural example of the trading management information in this embodiment. 本実施形態の電力アセット管理方法のフロー例１を示す図である。It is a figure which shows the flow example 1 of the electric power asset management method of this embodiment. 本実施形態の画面例１を示す図である。It is a figure which shows the screen example 1 of this embodiment. 本実施形態の画面例２を示す図である。It is a figure which shows the screen example 2 of this embodiment. 本実施形態の画面例３を示す図である。It is a figure which shows the screen example 3 of this embodiment. 本実施形態の画面例４を示す図である。It is a figure which shows the screen example 4 of this embodiment. 本実施形態の画面例５を示す図である。It is a figure which shows the screen example 5 of this embodiment.

＜発明の概要＞
既に述べたように、卒ＦＩＴにより生じる余剰電力の使途は、主に２通り想定される。すなわち、小売電気事業者への売電、または、自宅に設置した蓄電設備（例：昼間運転型エコキュート、蓄電池）または電気自動車への蓄電による自家消費、である。
その一方で、多くのメリットがある電気自動車を、卒ＦＩＴ世帯が購入し、例えば、家庭用太陽光発電システムで生じた余剰電力を、当該電気自動車にて蓄電するとすれば、別の観点で課題が生じ、電気自動車導入を妨げる結果となりうる。
こうした課題とは、１．電気自動車の使用時（自宅から電気自動車で外出するケース）の余剰電力は、小売電気事業者が定めた安価な買取単価で売電することなり、経済的メリットを享受しにくい、２．外出先での電気自動車の充電（例：スーパーや駐車場などでの充電）は、上述の買取単価よりも高い市場価格（販売単価）で買電した電力で行われ、自宅で充電するよりも高コスト化する、といったものになる。
上記課題を解決せずに、余剰電力を外部装置に充電すなわち売電すると共に、そうした外部装置から、必要に応じてユーザ都合のタイミングで買電し、自らの電気自動車に充電する、という運用を行えば、当該ユーザは経済的メリットを得る機会やその程度が低いか、或いは経済的にはマイナスとなる恐れもある。
また、そのような運用を行うためには、各ユーザや小売電気事業者、街中の充電設備といった各プレイヤーを一元管理し、各電気自動車の売電／買電の情報を集約管理する必要もでてくる。そうなると、当該運用を担う事業者等と契約する／できる者のみが参加できる、排他的で中央集権的な環境が生じかねない。電気自動車を蓄電対象として導入し、再生可能エネルギーにより生まれた余剰電力の蓄電や利用を、低コストで幅広く促進することは困難になる。
そこで本発明では、例えば各世帯で太陽光発電システム等により発電した電力のうち当該世帯で使用しなかった余剰電力の情報に、暗号化処理を適用して正の電力資産の情報を生成し、当該正の電力資産の情報を、当該世帯の電気自動車が備える記憶装置（例：ＥＴＣカードのＩＣチップなど）に格納し、街中の店舗や駐車場にて上述の電気自動車が充電サービスを受ける場合、そうした店舗等での充電量の情報に、暗号化処理を適用して負の電力資産の情報を生成し、当該負の電力資産の情報を電気自動車の記憶装置に格納し、正および負の各電力資産の情報を復号化して得た各値の間で相殺処理を行って電力純資産を算定し、当該電力純資産に暗号化処理を適用して電力純資産の情報を生成し、当該電力純資産の情報を上述の電気自動車の記憶装置に格納する。
こうした構成によれば、再生可能エネルギーに起因する余剰電力の効率的な利用を、電気自動車を通じて低コストに促進可能となる。
＜ネットワーク構成＞
以下に本発明の実施形態について図面を用いて詳細に説明する。図１は、本実施形態の電力アセット管理システム１０を含むネットワーク構成図である。図１に示す電力アセット管理システム１０は、再生可能エネルギーに起因する余剰電力の効率的な利用を、電気自動車を通じて低コストに促進可能とするコンピュータシステムである。
こうした電力アセット管理システム１０は、例えば、世帯端末５０、電気自動車の車載端末１００（情報処理装置）、小売電気事業者システム２００、および充電設備システム３００から構成できる。勿論、システム構成としてはこの形態に限定はしない。例えば車載端末１００ではなく、当該電気自動車のユーザが所持するスマートフォンを情報処理装置として採用するなど想定可能である。
また、本実施形態の電力アセット管理システム１０は、インターネットや適宜な専用線などのネットワーク１を介して、上述の世帯端末５０、車載端末１００、小売電気事業者システム２００、および充電設備システム３００が互いに通信可能に接続され、構成されている。
上述のシステム構成のうち、世帯端末５０は、上述の電気自動車のユーザが居住する世帯に備わる端末であり、例えば、当該世帯に備わる太陽光発電システムおよび系統電源（小売電気事業者から給電される商用電源）の間にある配電盤（情報処理機能を保持）などを想定しうる。世帯端末５０は、宅内ネットワーク（例：電灯線ネットワークや無線ＬＡＮなど）を介し、売買管理情報５に関して、当該世帯の敷地にて駐車中の電気自動車の車載端末１００と通信可能であるとする。
上述の売買管理情報５は、当該世帯が系統電源から買電した電力の情報、および太陽光発電システムでの発電量のうち余剰電力を売電した情報、などが該当する。
この世帯では、再生可能エネルギーである太陽光により太陽光発電システムにて発電し、この電力を一般的な自家消費を行う他、電気自動車への給電源としても利用する。勿論、そうした太陽光発電システムでの発電量が、当該世帯での電力消費全てをまかなえない状況もありうるため、その場合、系統電源から従前どおりの給電を受けることになる。
また、車載端末１００は、上述のユーザが管理する電気自動車の車載端末であって、一例としては、ＥＴＣカード１６５の読み取りとＥＴＣゲートでの決済処理を行うＥＴＣ端末を想定する。この車載端末１００は、本実施形態の電力アセット管理システムを主として構成する情報処理装置に該当する。また、自身の通信装置１１０を用いて、およびネットワーク１や上述の宅内ネットワークを介して、世帯端末５０、充電設備システム３００、と通信可能であるとする。この車載端末１００のハードウェア構成やデータベースの具体的な例については後述する。
また、小売電気事業者システム２００は、各小売電気事業者（図中では小売電気事業者Ａと小売電気事業者Ｂ）が運用するシステムであって、一例としてはサーバ装置を想定する。また、この小売電気事業者システム２００は、上述の車載端末１００を備える電気自動車が通常所在する世帯、すなわち当該電気自動車のユーザの所在世帯での、再生可能エネルギーにより発電された電力を、系統を通じて受け入れ、予め定めた買取単価にて買電する処理と、逆に、系統を通じて当該世帯（や電気自動車）に給電して販売単価で売電する処理を実行する。
この小売電気事業者システム２００は、上述の世帯への給電や当該世帯からの買電に伴い、世帯端末５０すなわち配電盤に、それらの情報すなわち売買管理情報５を通知する。
また、充電設備システム３００は、街中のスーパーやコンビニエンスストアなどの店舗、高速道路や一般道の給油所、駐車場、或いはカーディーラー、公共施設などに設置されている、電気自動車向け充電設備を管理するシステムであって、一例としてはサーバ装置を想定する。
この充電設備システム３００は、充電設備における電気自動車への給電（充電）に伴い、給電量の情報（或いは電気自動車からの買電の情報も含みうる）すなわち売買管理情報５を管理し、これを当該電気自動車の車載端末１００に通知しうる装置である。そのため、充電設備システム３００は、例えば、電気自動車の車載端末１００と、給電用ケーブルを介して通信可能に接続されるものとする。
＜ハードウェア構成＞
続いて、電力アセット管理システム１０を構成する各装置のうち、車載端末１００のハードウェア構成について図１に基づき説明する。
本実施形態における車載端末１００は、通信装置１１０、記憶装置１２０、演算装置１３０、入力装置１４０、出力装置１５０、およびカードリーダ１６０を備える。
このうち通信装置１１０は、携帯電話網や公衆無線ＬＡＮ、宅内電灯線ネットワーク、など適宜なネットワーク１と接続して、世帯端末５０、充電設備システム３００などの外部装置との通信処理を担う。
また、記憶装置１２０は、ハードディスクドライブやＳＳＤなど適宜な不揮発性記憶素子で構成された記憶手段である（この記憶装置１２０の概念に、揮発性記憶素子のＲＡＭなど、いわゆるメモリの構成を含むとしてもよい）。
また、演算装置１３０は、例えば記憶装置１２０に保持されるプログラム１２１を読み出して実行し装置自体の統括制御を行なうとともに各種判定、演算及び制御処理を行なうプロセッサである。
なお、記憶装置１２０内には、本実施形態の電力アセットシステム１０における車載端末１００として必要な機能を実装する為のプログラム１２１において、売買管理情報５に適用して電力資産の情報を生成するアルゴリズムとして、暗号化プログラム１２２を保持している。
また、上述の暗号化プログラム１２２で生成された電力資産の情報は、カードリーダ１６０を介してＥＴＣカード１６５のＩＣチップ内における、アセット管理ＤＢ１７０に格納される。また、このＥＴＣカード１６５には、正負の電力純資産の情報に基づき生成される電力純資産情報１７１も格納される。これらアセット管理ＤＢ１７０や電力純資産情報１７１のデータ構成詳細については後述する。ただし、こうした格納形態は一例であって、記憶装置１２０に予め設けたセキュアな記憶領域に格納するとしてもよい。
また、入力装置１４０は、当該車載端末１００のユーザによる入力操作を受け付けるインターフェイスであって、各種ボタン、キーボード、マウス、マイク等が含まれる。
また、出力装置１５０は、演算装置１３０での処理結果を出力するインターフェイスであって、ディスプレイ、スピーカーといったものが含まれる。
＜データ構造例＞
次に、本実施形態の電力アセット管理システム１０における車載端末１００が用いるデータベースにおけるデータ構造例について説明する。図２は本実施形態におけるアセット管理ＤＢ１７０の構成例を示す図である。
このアセット管理ＤＢ１７０は、電気自動車に関して生じた正負の電力資産の情報を格納したデータベースである。より具体的に、アセット管理ＤＢ１７０のデータ構造は、例えば、日付をキーに、当該日において生じた電力資産の情報として、当該電気自動車のＩＤ、利用者を一意に識別するユーザＩＤ、当該電気自動車が日常的に所在する施設を一意に識別する自施設ＩＤ、当該電気自動車が充電を受けた別施設のＩＤ、当該自施設の余剰電力を売電した小売電気事業者のＩＤ、電力資産の正負、および当該電力資産の情報、といった値を対応付けたレコードの集合体となっている。
このうち、電力資産の情報は、買取金額の値か買電金額の値を示すものとなる。このうち買電金額は、店舗等の外部施設で上述の電気自動車に充電がなされた際の、充電量の情報であって、より具体的には、当該電気自動車への充電量に、当該外部施設における充電料金の単価を乗算して得た充電額が該当する。また、買取金額は、当該電気自動車の所在施設である上述の世帯において、その太陽光発電システムなどでの発電量のうちの余剰電力を系統を通じて小売電気事業者に買い取らせた際の金額である。この買取金額は、当該余剰電力の電力量に、当該小売電気事業者が定めた買取単価を乗算し算定する。
また、図３に電力純資産情報１７１の例を示す。電力純資産情報１７１は、上述のアセット管理ＤＢ１７０で保持する各電力資産の情報を、その正負を踏まえて相殺して残った残価を、現時点での電力純資産として管理する情報である。
また、図４に売買管理情報５のデータ構成例を示す。この売買管理情報５は、上述のアセット管理ＤＢ１７０の１レコードの元となる情報である。そのデータ構成は、例えば、日付をキーに、電気自動車ＩＤ、ユーザＩＤ、施設ＩＤ、電力資産の正負、および電力資産の情報といった値を対応付けたレコードの集合体である。
ここで示す売買管理情報５は、一例として、街中で電気自動車に充電サービスを提供する施設の充電設備システム３００が保持するものをあげている。したがって、この施設を訪れて充電を受けようとする電気自動車が現れるごとに、売買管理情報５のレコードが追加されていくことになる。
また、売買管理情報５における項目のうち、電気自動車ＩＤは、当該施設で充電を受けた電気自動車の識別情報である。また、ユーザＩＤは、その電気自動車のユーザの識別情報である。また、施設ＩＤは、その充電サービスを提供している本施設の識別情報である。
こうした売買管理情報５は、充電設備システム３００が、電気自動車ＩＤごとにレコードを仕訳した上で、当該電気自動車の車載端末１００に送信される。
＜電力アセット管理方法のフロー例＞
以下、本実施形態の電力アセット管理システム１０における動作例について図に基づき説明する。図５は、本実施形態における電力アセット管理方法のフロー例を示す図である。以下で説明する各種動作は、電力アセット管理システム１０における世帯端末５０や車載端末１００、充電設備システム３００が実行するプログラムによって実現される。そして、このプログラムは、以下に説明される各種の動作を行うためのコードから構成されている。
まず前提として、或る世帯の建物において太陽光発電システムが稼働中であり、この世帯の居住者は電気自動車を保有しているものとする。また、上述の太陽光発電システムで発電した電力のうち、当該建物の電気機器等での消費分を除いた余剰電力は、電気自動車の充電に使用されるが、当該電気自動車が外出中または満充電である場合、系統を通じて小売電気事業者に売却すなわち買い取りさせるポリシーが運用中である（但し、これはあくまでも一例である）。
こうした前提の世帯において、上述の太陽光発電システムにおいて発電中であり、その発電量に余剰分が生じており、かつ電気自動車は不在であったとする。その場合、当該世帯の建物に備わる世帯端末５０は、系統を通じて小売電気事業者に売電した余剰電力量の値を、ネットワーク１を通じて電気自動車の車載端末１００に通知（図６参照）する。
一方、車載端末１００は、上述の余剰電力量の値の通知を受け、これを暗号化プログラム１２２に適用することで、正の電力資産の情報を生成する（ｓ１０）。
なお、電気自動車が不在であった場合、世帯端末５０は上述の余剰電力量の値を一旦保持しておき、当該電気自動車が戻ってきた際に通知するとしてもよい。
こうした暗号化プログラム１２２における正の電力資産の情報の生成手順としては、例えば、上述の小売電気事業者における買取単価を余剰電力量の値に乗算することで買取金額を算定する。また、この買取金額を例えば暗号鍵で暗号化し、これを正の電力資産の情報とするものとなる。この暗号鍵は、車載端末１００に固有のもので、暗号化プログラム１２２または記憶装置１２０のセキュアな領域に秘匿されている。
また、車載端末１００は、ｓ１０で生成した正の電力資産の情報を、カードリーダ１６０を介し、ＥＴＣカード１６５の記憶領域におけるアセット管理ＤＢ１７０に格納する（ｓ１１）。
その後、上述の電気自動車が移動して充電施設に到着し、この充電施設にて充電サービスを受けようとしている状況を想定する。この場合、車載端末１００は、ＥＴＣカード１６５のアセット管理ＤＢ１７０で保持する電力純資産情報１７１を抽出し、これを暗号化プログラム１２２により復号化（図７参照）し（暗号化プログラム１２２は復号化の機能も備える）、この電力純資産の値が少なくとも０以上で、充電に対応する残り価値があるか判定する（ｓ１２）。
なお、車載端末１００は、アセット管理ＤＢ１７０において正の電力資産の情報しか存在していない場合、上述のｓ１２において、当該正の電力資産の情報それぞれを暗号化プログラム１２２に適用して復号化し、買取金額の各値を取得、集計し、電力純資産の値を得るとしてもよい。
上述の判定の結果、充電に対応する残り価値が無い場合（ｓ１２：ｎ）、電気自動車に対する電施設での充電量すなわち買電量の値を、暗号化プログラム１２２に適用して負の電力資産の情報（図８参照）を生成し、ＥＴＣカード１６５のアセット管理ＤＢ１７０に格納し（ｓ１３）、処理をｓ１０に遷移させる。
こうした暗号化プログラム１２２における負の電力資産の情報の生成手順としては、例えば、上述の充電施設における充電単価を、充電量の値に乗算することで買電金額を算定する。また、この買電金額を例えば暗号鍵で暗号化し、これを負の電力資産の情報とするものとなる。この暗号鍵は、車載端末１００に固有のもので、暗号化プログラム１２２または記憶装置１２０のセキュアな領域に秘匿されている。
一方、上述の判定の結果、充電に対応する残り価値がある場合（ｓ１２：ｙ）、車載端末１００は、ＥＴＣカード１６５のアセット管理ＤＢ１７０で保持する電力純資産情報１７１を抽出して、これを暗号化プログラム１２２により復号化し、この電力純資産の値を決済資金とし、上述の充電施設における今回の充電のための充電料金に充当（図９参照）する（ｓ１４）。
この場合、充電施設の充電設備システム３００が、電気自動車への充電量に充電単価を乗算した充電金額を、車載端末１００に通知するものとする。一方、車載端末１００は、充電設備システム３００との間で、上述の通知が示す充電金額に対応した額を、上述の電力純資産の値で決済する処理を実行することとなる。こうした決済処理自体は、従来技術を適宜に適用したものとなる。
続いて、車載端末１００は、上述のｓ１４での充当の処理により減算された電力純資産の値を、暗号化プログラム１２２に適用して、新たな電力純資産の情報を生成し、これで電力純資産情報１７１を更新する（ｓ１５）。
車載端末１００は、上述の更新の結果、電力純資産の値が負の値となっている場合（ｓ１６：ｙ）、電力資産の貸付情報として出力装置１５０に表示（図１０参照）し（ｓ１７）、処理を終了する。他方、上述の更新の結果、電力純資産の値が正の値となっている場合（ｓ１６：ｎ）、そのまま処理を終了する。
なお、車載端末１００は、上述のように電力純資産情報１７１の更新や登録を随時行うのではなく、一定期間ごとに実行するとしてもよい。その場合、車載端末１００は、アセット管理ＤＢ１７０で保持する、正および負の各電力資産の情報を暗号化プログラム１２２で復号化する。また、車載端末１００は、この復号化で得た各値（正または負）を集計すなわち相殺処理を行い、電力純資産の値を算定し、この算定値に暗号化プログラム１２２を適用することで電力純資産の情報を生成する。
また、売電分の電力の買取先である小売電気事業者と、電気自動車への充電用電力の売電元（充電施設への給電を行う小売電気事業者）とが異なる事業者である場合、上述の車載端末１００は、暗号化プログラム１２２として、買取先の小売電気事業者から取得した買取単価に基づいて、売電分の電力の買取金額を算定し、当該算定で得た買取金額の値に暗号化プログラム１２２を適用することで、正の電力資産の情報を生成する。また、車載端末１００は、売電元の小売電気事業者から取得した充電単価に基づいて、電気自動車への充電電力の買電金額を算定し、当該算定で得た買電金額の値に暗号化プログラム１２２を適用することで、負の電力資産の情報を生成する。
また、上述の建物ないし電気自動車が、充電施設ないし他の電気自動車に対する充電を行った場合、車載端末１００は、当該充電量に暗号化プログラム１２２を適用して、正の電力資産の情報を生成して、ＥＴＣカード１６５のアセット管理ＤＢ１７０に格納する。また、電気自動車が他の電気自動車から充電を受けた場合、車載端末１００は、当該充電量に暗号化プログラム１２２を適用して、負の電力資産の情報を生成し、これをＥＴＣカード１６５のアセット管理ＤＢ１７０に格納する。
以上、本発明を実施するための最良の形態などについて具体的に説明したが、本発明はこれに限定されるものではなく、その要旨を逸脱しない範囲で種々変更可能である。
こうした本実施形態によれば、再生可能エネルギーに起因する余剰電力の効率的な利用を、電気自動車を通じて低コストに促進可能となる。<Outline of the invention>
As already mentioned, there are two main uses for the surplus electricity generated by the graduate FIT. That is, selling electricity to a retail electric power company, or self-consumption by storing electricity in a power storage facility (eg, daytime operation type EcoCute, storage battery) installed at home or in an electric vehicle.
On the other hand, if a graduated FIT household purchases an electric vehicle that has many merits, and for example, the surplus electricity generated by a household photovoltaic power generation system is stored in the electric vehicle, there is a problem from another viewpoint. Can result in hindering the introduction of electric vehicles.
These issues are: 1. When using an electric vehicle (when going out from home with an electric vehicle), the surplus electricity will be sold at a low purchase unit price set by the retail electric power company, and it is difficult to enjoy the economic benefits. Charging an electric vehicle on the go (eg charging at a supermarket or parking lot) is done with electricity purchased at a market price (sales unit price) higher than the above-mentioned purchase unit price, rather than charging at home. The cost will increase.
Without solving the above problems, the surplus power is charged to an external device, that is, sold, and the power is purchased from such an external device at the user's convenience as needed to charge its own electric vehicle. If done, the user may have a low or low level of financial benefit, or may be economically negative.
In addition, in order to perform such an operation, it is necessary to centrally manage each player such as each user, retail electric power company, and charging equipment in the city, and centrally manage information on power sales / purchase of each electric vehicle. Come on. In that case, an exclusive and centralized environment may be created in which only those who can / can contract with the business operator responsible for the operation can participate. It will be difficult to introduce electric vehicles as storage targets and widely promote the storage and utilization of surplus electricity generated by renewable energy at low cost.
Therefore, in the present invention, for example, of the electric power generated by the solar power generation system or the like in each household, the surplus electric power information not used in the household is subjected to the encryption process to generate positive electric power asset information. When the information on the positive power assets is stored in a storage device (eg, IC chip of an ETC card) provided in the electric vehicle of the household, and the above-mentioned electric vehicle receives a charging service at a store or parking lot in the city. , The information on the amount of charge in such stores is encrypted to generate the information on the negative power assets, and the information on the negative power assets is stored in the storage device of the electric vehicle, and the positive and negative power assets are stored. The information of each electric power asset is decrypted and offset processing is performed between each value to calculate the electric power net asset, and the encryption processing is applied to the electric power net asset to generate the electric power net asset information, and the electric power net asset The information is stored in the storage device of the electric vehicle described above.
According to such a configuration, efficient use of surplus electricity generated by renewable energy can be promoted at low cost through an electric vehicle.
<Network configuration>
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a network configuration diagram including the electric power asset management system 10 of the present embodiment. The electric power asset management system 10 shown in FIG. 1 is a computer system that enables efficient use of surplus electric power due to renewable energy to be promoted at low cost through an electric vehicle.
Such an electric power asset management system 10 can be composed of, for example, a household terminal 50, an in-vehicle terminal 100 (information processing device) of an electric vehicle, a retail electric power company system 200, and a charging equipment system 300. Of course, the system configuration is not limited to this form. For example, instead of the in-vehicle terminal 100, it is possible to assume that a smartphone owned by the user of the electric vehicle is adopted as the information processing device.
Further, the electric power asset management system 10 of the present embodiment includes the above-mentioned household terminal 50, in-vehicle terminal 100, retail electric power company system 200, and charging equipment system 300 via the Internet or a network 1 such as an appropriate leased line. They are connected and configured to communicate with each other.
Among the above-mentioned system configurations, the household terminal 50 is a terminal provided in the household in which the user of the above-mentioned electric vehicle resides, and is, for example, a photovoltaic power generation system and a grid power source (powered by a retail electric power company) provided in the household. It is possible to imagine a switchboard (holding an information processing function) between (commercial power sources). It is assumed that the household terminal 50 can communicate with the in-vehicle terminal 100 of the electric vehicle parked on the premises of the household with respect to the sales management information 5 via the home network (eg, a lamp line network, a wireless LAN, etc.).
The above-mentioned sales management information 5 corresponds to information on the power purchased by the household from the grid power source, information on selling surplus power among the amount of power generated by the photovoltaic power generation system, and the like.
In this household, solar power, which is a renewable energy source, is used to generate electricity in a photovoltaic power generation system, and this power is used for general self-consumption and also as a power source for electric vehicles. Of course, there may be a situation where the amount of power generated by such a photovoltaic power generation system cannot cover all the power consumption of the household, and in that case, the power is supplied from the grid power source as before.
Further, the in-vehicle terminal 100 is an in-vehicle terminal of an electric vehicle managed by the above-mentioned user, and as an example, an ETC terminal that reads an ETC card 165 and performs payment processing at an ETC gate is assumed. The in-vehicle terminal 100 corresponds to an information processing device that mainly constitutes the electric power asset management system of the present embodiment. Further, it is assumed that it is possible to communicate with the household terminal 50 and the charging equipment system 300 using its own communication device 110 and via the network 1 and the above-mentioned home network. A specific example of the hardware configuration and database of the in-vehicle terminal 100 will be described later.
Further, the retail electric power company system 200 is a system operated by each retail electric power company (retail electric power company A and retail electric power company B in the figure), and a server device is assumed as an example. Further, the retail electric power company system 200 transmits the electric power generated by the renewable energy in the household where the electric vehicle equipped with the above-mentioned in-vehicle terminal 100 is normally located, that is, the household where the user of the electric vehicle is located, through the grid. The process of accepting and purchasing electricity at a predetermined purchase unit price, and conversely, the process of supplying power to the household (or electric vehicle) through the grid and selling the electricity at the selling unit price are executed.
The retail electric power company system 200 notifies the household terminal 50, that is, the switchboard, of the information, that is, the sales management information 5, in accordance with the power supply to the household and the purchase of power from the household.
In addition, the charging equipment system 300 manages charging equipment for electric vehicles installed in stores such as supermarkets and convenience stores in the city, refueling stations on highways and general roads, parking lots, car dealers, public facilities, and the like. As an example, a server device is assumed.
The charging equipment system 300 manages information on the amount of power supplied (or information on purchasing power from the electric vehicle), that is, sales management information 5, as the charging equipment supplies power (charges) to the electric vehicle. It is a device that can notify the in-vehicle terminal 100 of the electric vehicle. Therefore, it is assumed that the charging equipment system 300 is communicably connected to, for example, the in-vehicle terminal 100 of the electric vehicle via a power supply cable.
<Hardware configuration>
Subsequently, among the devices constituting the electric power asset management system 10, the hardware configuration of the in-vehicle terminal 100 will be described with reference to FIG.
The vehicle-mounted terminal 100 in the present embodiment includes a communication device 110, a storage device 120, an arithmetic device 130, an input device 140, an output device 150, and a card reader 160.
Of these, the communication device 110 is connected to an appropriate network 1 such as a mobile phone network, a public wireless LAN, and a home lamp line network, and is responsible for communication processing with an external device such as a household terminal 50 and a charging equipment system 300.
Further, the storage device 120 is a storage means composed of an appropriate non-volatile storage element such as a hard disk drive or SSD (assuming that the concept of the storage device 120 includes a so-called memory configuration such as a RAM of a volatile storage element). May be good).
Further, the arithmetic unit 130 is, for example, a processor that reads and executes a program 121 held in the storage device 120, performs integrated control of the apparatus itself, and performs various determinations, arithmetic operations, and control processes.
In the storage device 120, an algorithm for generating electric power asset information by applying it to the trading management information 5 in the program 121 for implementing the function required as the in-vehicle terminal 100 in the electric power asset system 10 of the present embodiment. As a result, the encryption program 122 is held.
Further, the information of the electric power asset generated by the above-mentioned encryption program 122 is stored in the asset management DB 170 in the IC chip of the ETC card 165 via the card reader 160. In addition, the ETC card 165 also stores the electric power net asset information 171 generated based on the positive and negative electric power net assets information. The details of the data structure of the asset management DB 170 and the net power asset information 171 will be described later. However, such a storage form is an example, and may be stored in a secure storage area provided in advance in the storage device 120.
Further, the input device 140 is an interface for receiving an input operation by the user of the in-vehicle terminal 100, and includes various buttons, a keyboard, a mouse, a microphone, and the like.
Further, the output device 150 is an interface for outputting the processing result of the arithmetic unit 130, and includes a display, a speaker, and the like.
<Example of data structure>
Next, an example of a data structure in the database used by the in-vehicle terminal 100 in the power asset management system 10 of the present embodiment will be described. FIG. 2 is a diagram showing a configuration example of the asset management DB 170 in the present embodiment.
This asset management DB 170 is a database that stores information on positive and negative electric power assets generated for electric vehicles. More specifically, the data structure of the asset management DB 170 includes, for example, the ID of the electric vehicle, the user ID that uniquely identifies the user, and the electric vehicle as information on the electric power assets generated on the date, using the date as a key. Own facility ID that uniquely identifies the facility where the electric vehicle is located on a daily basis, the ID of another facility where the electric vehicle is charged, the ID of the retail electric power company that sold the surplus electricity of the own facility, and the positive and negative of the electric power assets It is a collection of records associated with values such as, and information on the electric power asset.
Of these, the information on the electric power assets indicates the value of the purchase price or the value of the power purchase price. Of these, the power purchase amount is information on the amount of charge when the above-mentioned electric vehicle is charged at an external facility such as a store, and more specifically, the amount of charge to the electric vehicle is included in the external amount. The charge amount obtained by multiplying the unit price of the charge charge at the facility is applicable. In addition, the purchase price is the amount when the retail electric power company purchases the surplus power of the amount of power generated by the solar power generation system or the like in the above-mentioned household which is the facility where the electric vehicle is located. .. This purchase price is calculated by multiplying the amount of surplus electricity by the purchase unit price determined by the retail electric power company.
Further, FIG. 3 shows an example of net electric power asset information 171. The electric power net asset information 171 is information that manages the residual value remaining after offsetting the information of each electric power asset held in the above-mentioned asset management DB 170 based on the positive and negative of the information as the current electric power net asset.
Further, FIG. 4 shows an example of data configuration of the trading management information 5. The trading management information 5 is the information that is the source of one record of the above-mentioned asset management DB 170. The data structure is, for example, a collection of records in which values such as an electric vehicle ID, a user ID, a facility ID, a positive / negative power asset, and information on the power asset are associated with each other using a date as a key.
As an example, the sales management information 5 shown here is held by the charging equipment system 300 of a facility that provides a charging service to an electric vehicle in the city. Therefore, every time an electric vehicle that visits this facility and intends to be charged appears, a record of sales management information 5 is added.
Further, among the items in the sales management information 5, the electric vehicle ID is the identification information of the electric vehicle charged at the facility. The user ID is identification information of the user of the electric vehicle. The facility ID is identification information of the facility that provides the charging service.
Such sales management information 5 is transmitted to the in-vehicle terminal 100 of the electric vehicle after the charging equipment system 300 journalizes the records for each electric vehicle ID.
<Example of flow of power asset management method>
Hereinafter, an operation example in the power asset management system 10 of the present embodiment will be described with reference to the drawings. FIG. 5 is a diagram showing a flow example of the electric power asset management method in the present embodiment. The various operations described below are realized by programs executed by the household terminal 50, the in-vehicle terminal 100, and the charging equipment system 300 in the power asset management system 10. Then, this program is composed of the code for performing various operations described below.
First, it is assumed that a photovoltaic power generation system is in operation in a building of a household, and the resident of this household owns an electric vehicle. In addition, of the electric power generated by the above-mentioned solar power generation system, the surplus electric power excluding the amount consumed by the electric equipment of the building is used for charging the electric vehicle, but the electric vehicle is out of the office or full. In the case of charging, a policy is in operation to have retail electricity companies sell or buy through the grid (however, this is just an example).
It is assumed that in a household with such a premise, the above-mentioned photovoltaic power generation system is generating power, a surplus is generated in the amount of power generation, and an electric vehicle is absent. In that case, the household terminal 50 provided in the building of the household notifies the in-vehicle terminal 100 of the electric vehicle through the network 1 of the value of the surplus electric energy sold to the retail electric power company through the grid (see FIG. 6).
On the other hand, the in-vehicle terminal 100 receives the notification of the value of the surplus electric power described above, and applies this to the encryption program 122 to generate positive electric power asset information (s10).
If the electric vehicle is absent, the household terminal 50 may temporarily hold the above-mentioned value of the surplus electric energy and notify when the electric vehicle returns.
As a procedure for generating information on positive electric power assets in such an encryption program 122, for example, the purchase price is calculated by multiplying the purchase unit price by the retail electric power company described above by the value of the surplus electric power amount. Further, the purchase price is encrypted with, for example, an encryption key, and this is used as information on positive electric power assets. This encryption key is unique to the in-vehicle terminal 100 and is concealed in a secure area of the encryption program 122 or the storage device 120.
Further, the in-vehicle terminal 100 stores the information of the positive electric power asset generated in s10 in the asset management DB 170 in the storage area of the ETC card 165 via the card reader 160 (s11).
After that, it is assumed that the above-mentioned electric vehicle moves and arrives at the charging facility and is about to receive the charging service at this charging facility. In this case, the in-vehicle terminal 100 extracts the power net asset information 171 held by the asset management DB 170 of the ETC card 165 and decrypts it by the encryption program 122 (see FIG. 7) (the encryption program 122 is decrypted). It also has a function), and it is determined whether the value of this net power asset is at least 0 or more and there is a remaining value corresponding to charging (s12).
When the in-vehicle terminal 100 has only positive electric power asset information in the asset management DB 170, in s12 described above, each of the positive electric power asset information is applied to the encryption program 122 to be decrypted and purchased. Each value of the amount of money may be acquired and aggregated to obtain the value of net electricity assets.
As a result of the above determination, when there is no remaining value corresponding to the charge (s12: n), the value of the charge amount, that is, the power purchase amount at the electric facility for the electric vehicle is applied to the encryption program 122 to obtain the negative power asset. Information (see FIG. 8) is generated, stored in the asset management DB 170 of the ETC card 165 (s13), and the process is shifted to s10.
As a procedure for generating information on negative electric power assets in such an encryption program 122, for example, the power purchase amount is calculated by multiplying the charge unit price in the above-mentioned charging facility by the charge amount value. Further, this power purchase amount is encrypted with, for example, an encryption key, and this is used as information on negative power assets. This encryption key is unique to the in-vehicle terminal 100 and is concealed in a secure area of the encryption program 122 or the storage device 120.
On the other hand, as a result of the above determination, when there is a remaining value corresponding to charging (s12: y), the in-vehicle terminal 100 extracts the power net asset information 171 held by the asset management DB 170 of the ETC card 165 and encrypts it. Decryption is performed by the conversion program 122, and the value of this net electric power asset is used as a settlement fund and applied to the charging charge for the current charging at the above-mentioned charging facility (see FIG. 9) (s14).
In this case, the charging equipment system 300 of the charging facility notifies the in-vehicle terminal 100 of the charging amount obtained by multiplying the charging amount of the electric vehicle by the charging unit price. On the other hand, the in-vehicle terminal 100 executes a process of settling the amount corresponding to the charge amount indicated by the above notification with the above-mentioned net electric power asset value with the charging equipment system 300. Such payment processing itself is an appropriate application of the prior art.
Subsequently, the in-vehicle terminal 100 applies the value of the net power asset subtracted by the allocation process in s14 to the encryption program 122 to generate new information on the net power asset, whereby the net power asset information is generated. Update 171 (s15).
When the value of the net electric power asset is a negative value (s16: y) as a result of the above-mentioned update, the in-vehicle terminal 100 is displayed on the output device 150 as the loan information of the electric power asset (see FIG. 10) (s17). , End the process. On the other hand, when the value of the net electric power asset becomes a positive value as a result of the above-mentioned update (s16: n), the process is terminated as it is.
The in-vehicle terminal 100 may execute the power net asset information 171 at regular intervals instead of updating or registering the power net asset information 171 as described above. In that case, the in-vehicle terminal 100 decrypts the information of each of the positive and negative electric power assets held in the asset management DB 170 by the encryption program 122. Further, the in-vehicle terminal 100 aggregates or offsets each value (positive or negative) obtained by this decryption, calculates the value of the net electric power asset, and applies the encryption program 122 to the calculated value to obtain electric power. Generate net worth information.
In addition, when the retail electric power company that purchases the electric power for sale and the electric power sales source for charging the electric vehicle (the retail electric power company that supplies power to the charging facility) are different companies. As the encryption program 122, the above-mentioned in-vehicle terminal 100 calculates the purchase price of the electric power for sale based on the purchase unit price obtained from the retail electric power company of the purchase destination, and the purchase price obtained by the calculation is calculated. By applying the encryption program 122 to the value, positive power asset information is generated. Further, the in-vehicle terminal 100 calculates the purchase price of the charging power to the electric vehicle based on the charging unit price obtained from the retail electric power company that sells the power, and encrypts the value of the power purchase price obtained by the calculation. By applying the encryption program 122, information on negative electric power assets is generated.
Further, when the above-mentioned building or electric vehicle charges a charging facility or another electric vehicle, the in-vehicle terminal 100 applies an encryption program 122 to the charged amount to generate information on positive electric power assets. Then, it is stored in the asset management DB 170 of the ETC card 165. Further, when the electric vehicle is charged by another electric vehicle, the in-vehicle terminal 100 applies the encryption program 122 to the charged amount to generate information on negative electric power assets, which is used by the ETC card 165. Stored in the asset management DB 170.
Although the best mode for carrying out the present invention has been specifically described above, the present invention is not limited to this, and various modifications can be made without departing from the gist thereof.
According to this embodiment, efficient use of surplus electric power due to renewable energy can be promoted at low cost through an electric vehicle.

１ネットワーク
５売買管理情報
１０電力アセット管理システム
５０世帯端末
５１売買管理情報
１００車載端末（情報処理装置）
１１０通信装置
１２０記憶装置
１２１プログラム
１３０演算装置
１４０入力装置
１５０出力装置
１６０カードリーダ
１６５ＥＴＣカード
１７０アセット管理ＤＢ
１７１電力純資産情報
２００小売電気事業者システム
３００充電設備システム
３０１売買管理情報1 Network 5 Trading management information 10 Power asset management system 50 Household terminal 51 Trading management information 100 In-vehicle terminal (information processing device)
110 Communication device 120 Storage device 121 Program 130 Arithmetic unit 140 Input device 150 Output device 160 Card reader 165 ETC card 170 Asset management DB
171 Net Electricity Asset Information 200 Retail Electricity Operator System 300 Charging Equipment System 301 Trading Management Information

Claims

It is an in-vehicle device for electric vehicles.
A storage device that securely holds the encryption key unique to this in-vehicle device,
Of the amount of power generated at the user's home of the electric vehicle, the value of the power sold to the grid is acquired from the terminal that manages the power trading with the grid at the user's home, and a predetermined algorithm is applied to the value of the sold power. The process of calculating the amount of electricity sold by applying it, generating the information of the positive power asset encrypted by the encryption key on the amount of electricity sold, and storing it in the storage device, and another facility other than the user's house. The value of the amount of electricity purchased for charging the electric vehicle is obtained from a device that manages information on charging or selling electricity at the other facility, and the amount of electricity purchased is calculated by applying a predetermined algorithm to the value of the amount of electricity purchased. Then, the process of generating the information of the negative electric power asset obtained by encrypting the purchased amount of electricity with the encryption key and storing it in the storage device, and the decryption of the positive and negative electric power assets are performed. An in- vehicle device including an arithmetic device that performs a process of offsetting between electric power assets to generate information on the net electric power and stores the information of the net electric power in the storage device, and an arithmetic device for executing the process.
Power asset management system including.

The arithmetic unit
When the electric vehicle is charged at the other facility, a process of allocating the information on the positive electric power assets held in the storage device or the information on the net electric power assets to the charging charge for the charging is further executed as the settlement fund. , The application of the algorithm and the encryption are executed on the value of the electric power asset subtracted by the appropriation process to generate new positive or negative electric power asset information and store it in the storage device. is there,
The electric power asset management system according to claim 1.

The arithmetic unit
As the algorithm, the amount of electricity sold from the user's home and the separate price based on the purchase unit price of electric power from the user's home and the charge unit price associated with charging at the other facility, which are determined in advance or obtained from a predetermined business operator. Information on electric power assets is generated by calculating the purchase amount of charged electric power at a facility, applying the algorithm to the value of the amount obtained in the calculation, and executing the encryption.
The electric power asset management system according to claim 1 or 2.

When the calculation device is a business operator whose purchase destination of the electric power for the sale of electric power and the power sale source of the electric power for charging the electric vehicle are different, the purchase unit price obtained from the business operator of the purchase destination is used as the algorithm. based on, to calculate the purchase amount of power of the power selling content, by executing the application and the encryption of the algorithm to the value of the purchase amount obtained in the calculation, generates information of the positive power assets Then, the purchase amount of the charged power is calculated based on the charge unit price obtained from the business operator of the power seller, and the algorithm is applied and the encryption is executed on the value of the purchase amount obtained by the calculation. By doing so, the information on the negative electric power assets is generated.
The electric power asset management system according to claim 3.

The arithmetic unit
When the value of the net electric power asset is a negative value, it is output as the loan information of the electric power asset.
The electric power asset management system according to any one of claims 1 to 4.

The arithmetic unit
When the user's house or the electric vehicle charges the other facility or another electric vehicle, the application of the algorithm and the encryption are executed on the charged amount to generate the information of the positive electric power asset. Then, when the electric vehicle is stored in the storage device and the electric vehicle is charged by another electric vehicle, the application of the algorithm and the encryption are executed on the charged amount to generate the information of the negative electric power asset. And store it in the storage device,
The electric power asset management system according to any one of claims 1 to 5.

In-vehicle equipment for electric vehicles
In the storage device, the encryption key unique to this in-vehicle device is securely held,
Of the amount of power generated at the user's home of the electric vehicle, the value of the power sold to the grid is acquired from the terminal that manages the power trading with the grid at the user's home, and a predetermined algorithm is applied to the value of the sold power. A process of calculating the amount of electricity sold by applying it, generating information on a positive electric power asset encrypted with the encryption key on the amount of electricity sold, and storing it in the storage device.
The value of the amount of electricity purchased for charging the electric vehicle at another facility other than the user's house is acquired from a device that manages information on charging or selling electricity at the other facility, and a predetermined algorithm is applied to the value of the amount of electricity purchased. To calculate the power purchase amount, generate information on the negative power asset that is encrypted with the encryption key, and store it in the storage device.
A process of decoding each of the positive and negative electric power assets, performing offset processing between the electric power assets to generate information on the electric power net assets, and storing the information of the electric power net assets in the storage device.
A power asset management method characterized by running.

The in- vehicle device
When the electric vehicle is charged at the other facility, a process of allocating the information on the positive electric power assets held in the storage device or the information on the net electric power assets to the charging charge for the charging is further executed as the settlement fund. The application of the algorithm and the encryption are performed on the value of the power asset subtracted by the allocation process to generate new positive or negative power asset information and store it in the storage device.
The electric power asset management method according to claim 7.

The in- vehicle device
As the algorithm, the amount of electricity sold from the user's home and the separate price based on the purchase unit price of electric power from the user's home and the charge unit price associated with charging at the other facility, which are determined in advance or obtained from a predetermined business operator. Information on electric power assets is generated by calculating the purchase price of charged power at the facility, applying the algorithm to the value of the amount obtained in the calculation, and executing the encryption.
The electric power asset management method according to claim 7 or 8.

The in- vehicle device
When the purchase destination of the electric power for the sale of electricity and the power sale source of the electric power for charging to the electric vehicle are different businesses, the above-mentioned algorithm is based on the purchase unit price obtained from the business of the purchase destination. By calculating the purchase price of electricity for the sale of electricity , applying the algorithm to the value of the purchase price obtained in the calculation, and executing the encryption, information on the positive power assets is generated, and the electricity sale is performed. By calculating the power purchase amount of the charged power based on the charge unit price obtained from the original business operator , applying the algorithm and executing the encryption to the value of the power purchase amount obtained in the calculation, the said Generate information on negative electricity assets,
The electric power asset management method according to claim 9.

The in- vehicle device
When the value of the net electric power asset is a negative value, it is output as the loan information of the electric power asset.
The electric power asset management method according to any one of claims 7 to 10.

The in- vehicle device
When the user's house or the electric vehicle charges the other facility or another electric vehicle, the application of the algorithm and the encryption are executed on the charged amount to generate the information of the positive electric power asset. Then, when the electric vehicle is stored in the storage device and the electric vehicle is charged by another electric vehicle, the application of the algorithm and the encryption are executed on the charged amount to generate the information of the negative electric power asset. And store it in the storage device,
The electric power asset management method according to any one of claims 7 to 11.