JP7645744B2 - Battery power distribution system - Google Patents

Description

This application relates to a battery power distribution system.

Currently, the most common means of transmitting and distributing electricity is through transmission and distribution lines. However, in recent years, natural disasters and abnormal weather have been increasing, and this has created a problem in that large-scale, long-lasting power outages caused by accidents on transmission or distribution lines are on the rise.

To solve these problems, a power system is known that uses storage batteries to supply power, eliminating the risk of power outages caused by transmission line and distribution line accidents due to natural disasters or abnormal weather (see, for example, Patent Document 1).
Furthermore, a system is known in which a self-propelled battery receives power from a solar or wind power generation system without using power transmission or distribution lines, and travels to a location where power is required (see, for example, Patent Document 2).

International Publication WO2019/124479 JP 2017-195722 A

However, these systems are either emergency systems that assume the use of power line transmission and distribution facilities, or are intended as power supply systems in limited areas where autonomously mobile batteries can be used, and are not capable of fundamentally resolving power outages caused by transmission or distribution line accidents. In addition, the use of transmission and distribution lines does not enable the resolution of voltage problems or current problems (overload) that arise when a large number of distributed power sources, such as photovoltaic power generation (PV), electric vehicles (EV), and storage batteries, are connected to the power distribution system.

This application has been made to solve the problems described above, and aims to provide a battery power distribution system that eliminates power lines from the entire distribution facility (power transmission, transformation, and distribution) for supplying electricity to consumers such as residential and apartment complexes.

The battery power distribution system disclosed in the present application comprises:
An energy storage service facility that stores electricity generated by power generators in storage batteries via a power transmission and distribution facility and delivers it to consumers in areas where power lines have been removed.
A consumer-side integrated system that predicts future electricity demand in real time based on the storage status of the delivered storage battery, the power generation status from distributed power sources other than the storage battery, and the load status of the power-using equipment connected to the storage battery used by the consumer, compares the remaining capacity of the storage battery with the power usage status of the power-using equipment, and, if it is determined based on the prediction that the remaining capacity of the storage battery is insufficient for electricity , instructs automatic ordering of storage battery delivery or allows the consumer to select manual ordering ;
a battery management system that systematically forecasts electricity demand based on the amount of electricity from the battery ordered from the demand-side integrated system and the electricity supply and demand situation from the distributed power sources obtained from the demand-side integrated system, and optimizes the delivery schedule, delivery cost, and delivery route of the ordered battery based on this systematic demand forecast, and determines the market price of surplus electricity from the battery ;
Based on information from the battery management system, the energy storage service equipment enables planned charging of the batteries, and enables consumers to buy and sell surplus electricity from the batteries .

The battery power distribution system disclosed in this application can provide a battery power distribution system that eliminates power lines from the entire distribution equipment (power transmission, transformation, and distribution) of electricity supplied to consumers.

1 is a conceptual diagram showing the overall configuration of an electric power distribution facility that uses a storage battery distribution system according to embodiment 1. FIG. A diagram explaining a method of battery delivery in embodiment 1. 1 is a functional block diagram showing cooperation between a battery management system and a demand-side integrated system according to a first embodiment. FIG. 1 is a hardware configuration diagram of a battery management system and a demand-side integrated system according to a first embodiment. FIG.

Below, a preferred embodiment of the battery power distribution system according to the present application will be described with reference to the drawings. Note that the same reference numerals are used to designate the same contents and corresponding parts, and detailed descriptions thereof will be omitted.

Embodiment 1.
Fig. 1 is a conceptual diagram showing the overall configuration of an electric power distribution facility that uses a battery power distribution system according to embodiment 1. Electric power is distributed by supplying electric power generated by a power generation company 10, such as an electric power company, a natural energy company, or a power generation company, to a battery service company 20. The battery service company 20 stores electric power in a storage battery based on a forecast of electric power demand for a consumer 30 in an area R where power lines are not provided (off-grid area), and supplies the stored electric power to the consumer by one of the following methods.

As shown in Fig. 2, the supply method can be roughly divided into the following three methods. In Fig. 2, it is assumed that the battery service provider 20, retailers, and charging/discharging stations are located outside an area R that excludes power lines.
(1) A method in which the storage battery service provider 20 delivers the storage battery directly to the consumer 30 through a home delivery service. Alternatively, a home delivery service provided by an individual may be used.
(2) A method in which the battery service provider 20 delivers batteries to a retailer such as a home improvement store, or supplies power via a power line, and the consumer 30 purchases the power from the retailer.
(3) A method in which a storage battery is delivered to a charging/discharging station such as a gas station, or power is supplied via a power line, and the consumer 30 supplies power from a charging/discharging device installed at the charging/discharging station.

In this way, by supplying electricity through storage batteries instead of power lines, it is possible to eliminate problems such as unstable power supply voltages that occur when electricity from distributed power sources such as PV, EVs, and storage batteries is supplied to the power lines of a distribution system, or damage to the distribution lines caused by power supply with excessive currents.

When supplying electricity through such a battery distribution system, a means of moving electricity called "delivery" is used instead of a means of supplying electricity through power lines so that the required amount of electricity can be supplied to the consumer 30 when it is needed. For this reason, management and control of electricity (batteries) delivery is extremely important. To make this possible, the cooperation between the battery management system 200 and an integrated system of a Home Energy Management System (HEMS) and consumer terminal equipment (Intelligent Electronic Device: IED) (hereinafter referred to as the consumer integrated system 300) is described with reference to FIG. 3. The battery management system 200 is usually owned by the battery service provider 20, and the consumer integrated system 300 is owned by the consumer 30, but this is not limited to the above.

Figure 3 is a functional block diagram showing the cooperation between the battery management system 200 and the demand-side integrated system 300. In the figure, the arrows indicate the flow of data. First, the demand-side integrated system 300 will be explained.

<Demand side terminal device (IED) 301>
As shown in Fig. 1, various sensors are connected to the IED 301 by wire or wirelessly, and data is collected on the operating status of the equipment owned by the consumer. As shown in Fig. 3, data is collected by sensing the power generation status from the PV 302, and the charging status (remaining capacity), connection status, vibration status, location information, number of charging/discharging, charging/discharging time, abnormal status, etc. from the EV 303. Data is collected by sensing the power usage status from the load 304, and the charging status (remaining capacity), connection status, vibration status, location information, number of charging/discharging, charging/discharging time, abnormal status, etc. from the storage battery 305.
<HEMS306>
The data collected by the IED 301 is transmitted to the HEMS 306 for data linkage. The HEMS 306 has at least the following functions.

<EMS (Energy Management System) 307>
In order to reduce and prevent wasted energy, the energy usage status will be made visible. At a minimum, the following processes will be carried out.
(1) Display of power usage by time period (2) Display of power usage plan by time period (3) Request for power saving, proposal of power saving plan (4) Schedule management of power generation, discharge, and charging of various equipment to minimize costs

<SoC (State of Charge) Management 308>
The charging state of the EV 303 or the storage battery 305 is managed.

<Demand forecast (real-time forecast) 309>
Using AI, future demand is predicted based on the power generation status, load status, and storage status, and the remaining capacity data of the storage battery 305 is compared with the power usage status of the load 304. If there is a power shortage, an order is placed for the delivery of a storage battery.

<Automatic Order/Manual Order 310>
The storage battery 305 may be ordered automatically based on the demand forecasting function 309, or the consumer may manually order the storage battery 305. If the consumer does not automatically order the storage battery 305 despite the demand forecasting function 309 instructing the consumer to order the storage battery 305, a warning may be issued to the consumer.

<Security 311>
The device detects an abnormality such as theft of equipment or electricity theft in the EV 303 or the storage battery 305, sounds an alarm, displays a warning, and notifies the storage battery management system 200 of the abnormal state.

<Diagnosis Function 312>
If an abnormality symptom is detected within the demand side integrated system 300, a warning is displayed, the system prompts the user to repair or replace the part where the abnormality was detected, and notifies the battery management system 200 of the situation.

Next, the battery management system 200 will be described. The battery management system 200 and the demand-side integrated system 300 are connected to each other for data linkage and sending and receiving signals for instructions or suggestions. The connection is made by wire or wirelessly, and the cloud may be used as shown in FIG. 1. The target demanders are customers who have signed up for an electricity delivery service that utilizes storage batteries. The battery management system 200 has at least the following functions:

<Fee Simulator 201>
This is a sales promotion service for battery service providers that can calculate the contract holder's monthly power usage fee and monthly electricity bill from data transmitted from the demand side integrated system 300, simulate the charges, and propose a battery service plan that suits the customer by inputting customer information. In addition, the battery service provider may be able to calculate the cost of using the battery delivery service by inputting the electricity usage information of new customers.

Resource Management 202
A diagnosis is made based on the data provided by the demand-side integrated system 300, and the following proposals are made to the demand-side integrated system.
(1) Proposal of power saving plan/power usage plan by time period Like a gym trainer, the system proposes how to use electricity according to the request of the consumer who is the contract holder. For example, the contract holder may select any menu from a power saving menu such as "normal/moderate power saving/full power saving." In addition, a power usage plan by time period of the day may be proposed. The power usage plan may be proposed as needed based on the past power usage record.

The system also manages storage battery delivery resources such as people or vehicles for delivery, and performs equipment management such as remaining lifespan management of stockpiled storage batteries. In other words, it manages schedules for power generation, charging, and discharging that minimize costs based on the contractor's power usage history and usage forecast. This allows storage battery service providers to centrally manage daily schedules by monitoring the system. Management may be automated to save labor.
(2) Proposal of equipment replacement timing for PV 302 and storage battery 305 The replacement timing of equipment used by the contractor is proposed.

<Contract management 203, customer information management 204>
The contract management 203 manages the contract contents and contract period of the contractor, and the customer information management 204 manages the name, address, contact information, etc. of the contractor.

<Transaction management 205, fee management 206, demand forecast 207>
Based on the contract management 203 and the amount of power purchased and sold by the contractor from the consumer-side integrated system 300, and the power supply and demand status of the PV 302, EV 303, load 304, storage battery 305, etc. acquired by the consumer-side integrated system 300, the demand forecast is planned using AI. Based on this demand forecast, information is provided not only to the storage battery service provider but also to the contractor. Based on the provided information, a power trading market is provided in which surplus power of the storage battery 305 can be bought and sold between contractors or between the contractor and the storage battery service provider. By buying and selling in such a power trading market, surplus power by time period has value like crypto assets and can be bought and sold. In addition, based on this demand forecast, it is possible to plan charging of the storage battery 305 and control the flow and voltage of the power system. In light of this, the power transmission and distribution company 40 (see FIG. 1) can use the information obtained by the demand forecast of this system to solve voltage and current problems caused by a large amount of distributed power sources being connected to the power distribution system.

Logistics Optimization 208, Delivery Route Optimization 209
In addition, the demand forecast 207 calculates logistics optimization information such as a delivery schedule and delivery costs, optimizes a delivery route based on this information, traffic information, delivery vehicle information, etc., and instructs a delivery means on a delivery route according to the delivery means. The delivery means may be a vehicle, a drone, or any other means capable of delivering a storage battery.

An example of the hardware of the microcomputer in the battery management system 200 and the consumer side integrated system 300 is shown in FIG. 4. It is composed of a processor 1000 and a storage device 2000. Although not shown, the storage device has a volatile storage device such as a random access memory and a non-volatile auxiliary storage device such as a flash memory. Also, instead of the flash memory, a hard disk auxiliary storage device may be provided. The processor 1000 executes a program input from the storage device 2000 to perform processing for realizing the above-mentioned functions, for example, and transmits and receives data between the battery management system 200 and the consumer side integrated system 300. In this case, the program is input from the auxiliary storage device to the processor 1000 via the volatile storage device. Also, the processor 1000 may output data such as the calculation result to the volatile storage device of the storage device 2000, or may store the data in the auxiliary storage device via the volatile storage device.

As described above, the battery storage power distribution system of the present application makes it possible to eliminate power lines from the entire distribution equipment (transmission, transformation, and distribution) for supplying electricity to consumers such as ordinary homes and apartment complexes, and the battery management system makes it possible to provide an electricity trading market.
It is also possible to eliminate voltage and current problems occurring in the power distribution system.
Furthermore, for consumers who have signed a contract with an energy storage service provider, power will be supplied from storage batteries rather than through transmission and distribution lines, which will eliminate the risk of power outages caused by transmission or distribution line accidents that occur due to the increase in natural disasters and abnormal weather, thereby fundamentally resolving these problems.
In addition, by utilizing the battery storage distribution system of the present application and having battery storage service providers supply electricity using storage batteries, consumers will be located in off-grid areas that are completely isolated from the power grid. This will eliminate the voltage and current problems that arise when electricity from distributed power sources such as PV, EV, and storage batteries is supplied to the power lines of the power distribution system, and is expected to contribute to the further spread of distributed power sources.

Although exemplary embodiments are described herein, the various features, aspects, and functions described in the embodiments are not limited to application to a particular embodiment, but may be applied to the embodiments alone or in various combinations.
Therefore, countless modifications not illustrated are expected within the scope of the technology disclosed in the present specification, including, for example, modifying, adding, or omitting at least one component.

10: Power generation company, 20: Battery service provider, 30: Consumer, 40: Power transmission and distribution company, 200: Battery management system, 300: Consumer-side integrated system, 301: IED, 306: HEMS.

Claims (2)

An energy storage service facility that stores electricity generated by power generators in storage batteries via a power transmission and distribution facility and delivers it to consumers in areas where power lines have been removed.
a consumer-side integrated system that predicts future power demand in real time based on the power storage status of the delivered storage battery, the power generation status from distributed power sources other than the storage battery, and the load status of power-using equipment connected to the storage battery used by the consumer, compares the remaining capacity of the storage battery with the power usage status of the power-using equipment, and, when it is determined based on the prediction that the remaining capacity of the storage battery is insufficient for power , instructs automatic ordering of delivery of the storage battery or allows the consumer to select manual ordering;
a battery management system that systematically forecasts demand for electricity based on the amount of electricity from the storage batteries ordered from the demand-side integrated system and the electricity supply and demand situation from the distributed power sources obtained from the demand-side integrated system, and optimizes delivery schedules, delivery costs, and delivery routes for the ordered storage batteries based on this systematic demand forecast, and determines a market price for surplus electricity from the storage batteries ;
a storage battery distribution system that enables the power storage service equipment to plan charging of the storage battery based on information from the storage battery management system, and enables the consumer to buy and sell surplus power from the storage battery . The battery distribution system of claim 1, characterized in that the battery management system provides an electricity trading market that enables the buying and selling of electricity between the consumers or between the consumers and the energy storage service provider of the energy storage service equipment based on the determined market price of surplus electricity.

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