JP2023031522A - Storage battery power distribution system - Google Patents

Abstract

To cope with a large-scale, longtime power failure caused by a power line or a distribution line accident which tends to be increasing due to the increase of natural disasters and abnormal weather, and also against the occurrence of a voltage problem and a current problem caused by an overload resulting from a large number of distributed power supplies connected to a power distribution system.SOLUTION: A storage battery power distribution system includes: a customer side integral system, having power use equipment and power supply equipment connected thereto, which instructs to order power with necessary electric energy when determining, based on a storage battery charging state in the power supply equipment, that there is the shortage of power in the residual amount of the storage battery according to the power use state of the power use equipment; and a storage battery management system which, based on the order instruction from the customer side integral system, determines a storage battery delivery time to the power user, a delivery route and a delivery cost, so as to enable the delivery of a storage battery charged with necessary electric energy. This enables the provision of the storage battery power distribution system which eliminates power lines from the overall power distribution facility for supplying power to customers.SELECTED DRAWING: Figure 3

Description

The present application relates to battery power distribution systems.

Currently, the most common means of transmitting and distributing electricity is through transmission and distribution lines. However, due to the recent increase in natural disasters and abnormal weather, there is a problem that large-scale and long-term blackouts due to transmission line or distribution line accidents tend to increase more than before.

In order to solve such problems, electric power systems are known that eliminate the risk of blackouts due to power line accidents and distribution line accidents caused by natural disasters or abnormal weather by supplying power using storage batteries (for example, See Patent Document 1).
Furthermore, systems are known in which a self-propelled battery is supplied with power from a solar or wind power generation system without using transmission and distribution lines and moves to a place where power supply is required (e.g. , see Patent Document 2).

International publication WO2019/124479 JP 2017-195722 A

However, these systems are either emergency systems based on the premise of power transmission and distribution facilities by power lines, or are intended as power supply systems in limited areas where autonomously movable batteries can be used. Power outages caused by power line or distribution line faults cannot be completely eliminated. In addition, by using transmission lines and distribution lines, a large number of distributed power sources such as PV (Photovoltaics Power Generation), EV (Electric Vehicle), and storage batteries are connected to the distribution system. load) cannot be eliminated.

The present application was made to solve the above-mentioned problems, and is a storage battery power distribution system that eliminates power lines from the entire distribution facility (transmission, transformation, power distribution) of power supplied to consumers such as general houses and collective housing. is intended to provide

The storage battery power distribution system disclosed in the present application includes:
If a power-using device and a power-supplying device are connected, and it is determined that the remaining amount of the storage battery is insufficient based on the charging status of the storage battery of the power-supplying device, and the power usage status of the power-using device Based on the order instructions from the integrated system on the demand side, the system decides the delivery timing, delivery route, and delivery cost of the storage battery that stores the power according to the power usage situation, and starts the delivery. It is characterized by having a storage battery management system that instructs.

According to the storage battery power distribution system disclosed in the present application, it is possible to provide a storage battery power distribution system that eliminates power lines from the entire power distribution facilities (power transmission, power transformation, power distribution) to be supplied to consumers.

1 is a conceptual diagram showing the overall configuration of an electric power distribution facility that uses the storage battery power distribution system according to Embodiment 1. FIG. FIG. 2 is a diagram for explaining a storage battery delivery method according to Embodiment 1; FIG. 2 is a functional block diagram showing cooperation between the storage battery management system and the consumer side integrated system according to Embodiment 1. FIG. 1 is a hardware configuration diagram of a storage battery management system and a consumer side integrated system according to Embodiment 1. FIG.

Preferred embodiments of a storage battery power distribution system according to the present application will be described below with reference to the drawings. The same reference numerals are assigned to the same contents and corresponding parts, and detailed description thereof will be omitted.

Embodiment 1.
FIG. 1 is a conceptual diagram showing the overall configuration of a power distribution facility that uses the storage battery power distribution system of Embodiment 1. As shown in FIG. In the distribution of electric power, electric power generated by a power generator 10 such as an electric power company, a natural energy company, or a power generator is supplied to a storage battery service provider 20 . The storage battery service provider 20 accumulates power in the storage battery based on the power demand forecast of the consumer 30 in the area (off-grid area) R from which the power line is removed, and stores the accumulated power by one of the following methods. , to supply power to the consumer.

As shown in FIG. 2, the supply method can be broadly classified into the following three methods. In FIG. 2, the storage battery service provider 20, the retailer, and the charge/discharge station are assumed to be outside the area R from which power lines are excluded.
(1) A method of delivering the storage battery directly to the consumer 30 by a home delivery service by the storage battery service provider 20 . Or you may use a personal courier service.
(2) A method in which the storage battery service provider 20 delivers the storage battery to a retailer such as a home center or supplies power via a power line, and the consumer 30 purchases the power from the retailer.
(3) A method of delivering a storage battery to a charging/discharging station such as a gas station or supplying power via a power line, and supplying power from a charging/discharging device installed at the charging/discharging station by the consumer 30 .

In this way, by supplying power through the storage battery instead of the power line, the supply of unstable voltage occurs when the power from the distributed power sources such as PV, EV, and storage battery is supplied to the power line of the distribution system. Alternatively, damage to distribution lines due to power supply with an overload current can be eliminated.

In supplying electric power by such a storage battery power distribution system, in order to supply the required amount of electric power to the consumer 30 at the required time, instead of the electric power supply means by the power line, a power transfer means called "delivery" is used. will be used. Therefore, the management control of power (storage battery) delivery becomes extremely important. In order to enable this, a storage battery management system 200 and an integrated system of a HEMS (Home Energy Management System) and a consumer side terminal device (IED: Intelligent Electronic Device) (hereinafter referred to as a consumer side integrated system 300) Cooperation will be described with reference to FIG. Although the storage battery management system 200 is usually owned by the storage battery service provider 20 and the consumer side integrated system 300 is owned by the consumer 30, the present invention is not limited to this.

FIG. 3 is a functional block diagram showing cooperation between the storage battery management system 200 and the consumer side integrated system 300. As shown in FIG. Arrows in the figure indicate the flow of data. First, the consumer side integrated system 300 will be described.

<Demand side terminal device (IED) 301>
Various sensors are connected to the IED 301 by wire or wirelessly as shown in FIG. 1, and collects data on the operation status of equipment owned by the consumer. As shown in FIG. 3, the PV 302 senses the power generation status, and the EV 303 senses the charging status (remaining capacity), connection status, vibration status, position information, charging/discharging times, charging/discharging time, abnormal conditions, etc. Collect data. The power usage status is sensed from the load 304, and the charging status (remaining capacity), connection status, vibration status, position information, charging/discharging times, charging/discharging time, abnormal status, etc. from the storage battery 305 are sensed, and data is collected.
<HEMS306>
The data collected by IED301 are transmitted to HEMS306, in order to perform data cooperation. The HEMS 306 has at least the following functions.

<EMS (Energy Management System) 307>
Visualize energy usage to reduce and prevent wasted energy. Do at least the following:
(1) Display of power usage status by time period (2) Display of power usage plan by time period (3) Power saving request, power saving plan proposal (4) Power generation, discharge, charging schedule management for various equipment to minimize cost

<SoC (State of Charge) management 308>
It manages the state of charge of the EV 303 or storage battery 305 .

<Demand forecast (real-time forecast) 309>
AI is used to predict future demand from the power generation status, load status, and power storage status, compare the remaining capacity data of the storage battery 305 and the power usage status of the load 304, and if there seems to be a shortage of power, storage battery delivery to order.

<Automatic order/manual order 310>
The order for the storage battery 305 may be automatically placed based on the demand prediction function 309, or may be arbitrarily selected by the consumer, for example, manually. If the demand prediction function 309 instructs to place an order but the order is not placed automatically, the consumer may be warned.

<Security 311>
Abnormalities such as theft of equipment such as the EV 303 or the storage battery 305 or theft of electricity are detected, and an alarm is sounded and a warning is displayed. Along with this, the storage battery management system 200 is notified of the status of the abnormal state.

<Diagnosis function 312>
When an abnormality sign is detected in the consumer side integrated system 300, a warning is displayed to prompt repair or replacement of the detected abnormality, and the storage battery management system 200 is notified of the situation.

Next, the storage battery management system 200 will be described. The storage battery management system 200 and the consumer side integrated system 300 are connected for data linkage, transmission and reception of signals for instructions or suggestions. The connection may be wired or wireless, and may utilize the cloud as shown in FIG. The target consumers are contractors who have contracted for power distribution services that utilize storage batteries. The storage battery management system 200 has at least the following functions.

<Charge Simulator 201>
From the data sent from the demander side integrated system 300, calculate the monthly electricity usage fee of the contractor, the monthly electricity bill, etc., simulate the electricity bill, enter the customer information, and the storage battery service plan suitable for the person. This is a sales expansion service for storage battery service providers that can propose Also, the storage battery service provider may be able to calculate the cost of using the storage battery home delivery service by inputting information on the electricity usage of new customers.

<Resource management 202>
A diagnosis is made based on the data provided by the consumer side integrated system 300, and the following proposals are made to the consumer side integrated system.
(1) Proposal of power-saving plan/time-based power usage plan Like a gym trainer, we propose how to use electricity according to the needs of consumers, who are the contractors. For example, the contractor may select an arbitrary menu from a power saving menu such as "normal/moderate power saving/great power saving". Alternatively, a power usage plan for each time period of the day may be proposed. As for the power usage plan, the usage plan may be exercised as needed based on the past performance of power usage, and a proposal may be made.

It also manages facilities such as management of storage battery delivery resources such as people or vehicles for delivery, and management of the remaining life of stored storage batteries. In other words, the power generation, charging, or discharging schedule that minimizes the cost is managed based on the contractor's power usage record and usage forecast. As a result, storage battery service providers can centrally manage their daily schedules by monitoring this system. Management may be automated for labor saving.
(2) Proposal of equipment replacement timing of PV 302 and storage battery 305 Proposal of equipment replacement timing used by the contractor.

<Contract Management 203, Customer Information Management 204>
The contract management 203 manages the contractor's contract content and contract period, and the customer information management 204 manages the contractor's name, address, contact information, and the like.

<Transaction management 205, charge management 206, demand forecast 207>
AI is utilized based on the contract management 203 and the power supply and demand status of the PV 302, EV 303, load 304, storage battery 305, etc. acquired by the customer side integrated system 300, as well as the power purchase and sale amount ordered by the contractor from the customer side integrated system 300. and systematically make demand forecasts. Based on this demand forecast, information is provided not only to storage battery service providers but also to contractors. Based on the provided information, a power trading market is provided in which the surplus power of the storage battery 305 can be traded between contractors or between contractors and storage battery service providers. By trading in such a power trading market, the surplus power for each time zone has a value like cryptocurrency and can be traded. In addition, based on this demand forecast, it is possible to perform scheduled charging of the storage battery 305, and it is possible to control the power flow and voltage of the power system. By using the information obtained by prediction, it is possible to solve the voltage and current problems caused by the connection of a large number of distributed power sources to the distribution system.

<Logistics optimization 208, delivery route optimization 209>
The demand forecast 207 also calculates logistics optimization information such as delivery schedules and delivery costs, and optimizes delivery routes based on this information, traffic information, delivery vehicle information, etc. Instruct the delivery route according to the The delivery means may be any means capable of delivering the storage battery, such as a vehicle or a drone.

FIG. 4 shows an example of hardware of the microcomputer in the storage battery management system 200 and the consumer side integrated system 300. As shown in FIG. It is composed of a processor 1000 and a storage device 2000. Although not shown, the storage device includes a volatile storage device such as a random access memory and a non-volatile auxiliary storage device such as a flash memory. Also, an auxiliary storage device such as a hard disk may be provided instead of the flash memory. The processor 1000 executes a program input from the storage device 2000 to perform, for example, processing for realizing the functions described above, and performs transmission/reception between the storage battery management system 200 and the consumer side integrated system 300 . In this case, the program is input to the processor 1000 from the auxiliary storage device via the volatile storage device. Further, the processor 1000 may output data such as calculation results 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, with the storage battery power distribution system of the present application, it is possible to eliminate power lines from the entire power distribution facility (transmission, transformation, power distribution) that supplies power to consumers such as general housing and collective housing, and storage battery management The system can provide a power trading market.
Also, it is possible to solve the voltage problem and the current problem occurring in the distribution system.
In addition, consumers who have contracts with energy storage service providers will not be supplying power by using transmission and distribution lines, but by using storage batteries. Alternatively, it is possible to eliminate the risk of power outages due to power distribution line accidents, and these problems can be fundamentally resolved.
In addition, by utilizing the storage battery power distribution system of the present application, the storage battery service provider supplies power from the storage battery, so that the consumer belongs to an off-grid area completely separated from the power system. It is expected to contribute to the further spread of distributed power sources by eliminating the voltage and current problems caused by the supply of power from distributed power sources such as storage batteries to the power lines of the distribution system.

Although the present application has described exemplary embodiments, the various features, aspects, and functions described in the embodiments are not limited to application of particular embodiments, alone or Various combinations are applicable to the embodiments.
Accordingly, numerous variations not illustrated are envisioned within the scope of the technology disclosed herein. For example, the modification, addition, or omission of at least one component shall be included.

10: power generator, 20: storage battery service provider, 30: consumer, 40: power transmission and distribution company, 200: storage battery management system, 300: consumer side integrated system, 301: IED, 306: HEMS.

Claims (2)

When a power-using device and a power-supplying device are connected, and it is determined, based on the state of charge of a storage battery in the power-supplying device, that the remaining amount of the storage battery is insufficient according to the power-usage status of the power-using device. a demand side integrated system for instructing power ordering, and based on the order instruction from the demand side integrated system, the delivery time, delivery route, and delivery cost of the storage battery storing power according to the power usage situation. A battery distribution system with a battery management system that determines and directs delivery. The storage battery management system determines a market price of electric power based on data on the electric power supply and demand status of the electric power using equipment and the electric power supplying equipment and demand forecasts of a plurality of electric power users from the demand side integrated system. and providing the market price and the demand forecast of the plurality of power users to the plurality of power users through the integrated system on the demand side, so that the power stored in the storage battery among the plurality of power users can be shared. 2. The storage battery power distribution system according to claim 1, characterized in that it enables transactions.

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