Battery power distribution system

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

[Technical field]

[0001] This application relates to battery power distribution systems. [Background technology]

[0002] Currently, the most common means of transmitting and distributing electricity are transmission and distribution lines. However, in recent years, natural disasters and abnormal weather have been increasing, and large-scale, long-lasting power outages caused by accidents on transmission or distribution lines are becoming more common than ever before, which has become a problem.

[0003] To solve these problems, a power system is known that uses storage batteries to supply power, eliminating the risk of power outages caused by power transmission and distribution line accidents due to natural disasters, abnormal weather, and the like (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 and distribution lines, and moves to a location where power is required (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication WO2019 / 124479 [Patent Document 2] JP 2017-195722 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, these systems are either emergency systems based on 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 allow for the resolution of voltage problems or current problems (overload) caused by connecting a large number of distributed power sources, such as PV (Photovoltaics Power Generation), EVs (Electric Vehicles), and storage batteries, to the power distribution system.

[0006] This application has been made to solve the problems described above, and aims to provide a battery distribution system that eliminates power lines from the entire distribution equipment (transmission, transformation, and distribution) of electricity supplied to consumers such as ordinary homes and apartment buildings. [Means for solving the problem]

[0007] 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. The system 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 devices connected to the storage battery used by the consumer. It also compares the remaining capacity of the storage battery with the power usage status of the power-using devices, and based on the prediction, When it is determined that the remaining power in the storage battery is insufficient The system allows customers to choose whether to automatically order battery delivery or to manually order it. Demand side integrated system, From the demand-side integrated system A system is developed to systematically forecast electricity demand based on the amount of electricity from the ordered storage batteries and the electricity supply and demand situation from distributed power sources obtained from the demand-side integrated system, and the system optimizes the delivery schedule, delivery costs, and delivery routes of the ordered storage batteries based on this systematic demand forecast, while also determining the market price of surplus electricity from the storage batteries. Battery management system, Equipped with Based on information from the battery management system, the energy storage service equipment enables planned charging of the battery, and consumers can buy and sell surplus electricity from the battery. . Effect of the Invention

[0008] According to the battery power distribution system disclosed in the present application, it is possible to provide a battery power distribution system that eliminates power lines from the entire distribution facility (power transmission, transformation, and distribution) of power supplied to consumers. [Brief description of the drawings]

[0009] [Figure 1] 1 is a conceptual diagram showing an overall configuration of an electric power distribution facility that uses a storage battery power distribution system according to a first embodiment. [Diagram 2] FIG. 2 is a diagram illustrating a method of battery delivery according to the first embodiment. [Diagram 3] 2 is a functional block diagram showing cooperation between the battery management system and the demand-side integrated system according to the first embodiment. FIG. [Figure 4] 1 is a hardware configuration diagram of a battery management system and a demand-side integrated system according to a first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, preferred embodiments of the battery power distribution system according to the present invention 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 description thereof will be omitted.

[0011] Embodiment 1 Fig. 1 is a conceptual diagram showing the overall configuration of an electric power distribution facility that uses the battery power distribution system of 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 business operator, to a battery service provider 20. The battery service provider 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.

[0012] 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 storage service provider 20, retailers, and charging / discharging stations are located outside the area R where power lines are excluded. (1) A method in which a storage battery service provider 20 delivers a storage battery directly to a consumer 30 using a home delivery service. Alternatively, a home delivery service provided by an individual may be used. (2) A method in which a battery storage service provider 20 delivers batteries to a retailer such as a home improvement store, or supplies electricity via power lines, and a consumer 30 purchases electricity from the retailer. (3) A method in which a storage battery is delivered to a charging / discharging station such as a gas station, or electricity is supplied via a power line, and a consumer 30 supplies electricity from a charging / discharging device installed at the charging / discharging station.

[0013] In this way, by supplying electricity via storage batteries instead of power lines, it is possible to eliminate problems such as unstable power supply voltages that occur when power 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.

[0014] When supplying power through such a battery power distribution system, a means of moving power called "delivery" is used instead of a means of power supply by power lines so that the required amount of power can be supplied to the consumer 30 when it is needed. For this reason, management and control of power (battery) delivery becomes extremely important. 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 consumer integrated system 300) to make this possible will be 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.

[0015] 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, arrows indicate the flow of data. First, the demand-side integrated system 300 will be described.

[0016] <Integrated Electrical Equipment (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 equipment owned by consumers. 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 charge / discharge cycles, charge / discharge 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 charge / discharge cycles, charge / discharge 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.

[0017] 〈EMS(Energy Management System)307〉 In order to reduce and prevent wasteful energy, the energy usage status will be made visible. At a minimum, the following processes will be carried out. (1) Display of electricity usage by time period (2) Display of power usage plan by time period (3) Requests for energy conservation and proposals for energy conservation plans (4) Scheduling power generation, discharge, and charging for various equipment to minimize costs

[0018] <SoC (State of Charge) Management 308> Manage the charging state of the EV 303 or the storage battery 305.

[0019] <Demand forecast (real-time forecast) 309> Using AI, future demand is predicted based on the power generation, load, 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.

[0020] <Automatic Order / Manual Order 310> The storage battery 305 may be ordered automatically based on the demand forecast 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 forecast function 309 instructing the consumer to order the storage battery 305, a warning may be issued to the consumer.

[0021] <Security 311> The device detects an abnormality such as theft or electricity theft of 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.

[0022] <Diagnostic Function 312> If an abnormality symptom is detected within the demand side integrated system 300, a warning is displayed to prompt repair or replacement of the part where the abnormality was detected, and the situation is notified to the battery management system 200.

[0023] Next, the battery management system 200 will be described. The battery management system 200 and the consumer-side integrated system 300 are connected to each other for data linkage and 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. 1. Target consumers are those who have signed up for an electricity delivery service that utilizes batteries. The battery management system 200 has at least the following functions.

[0024] <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 the 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.

[0025] 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 ways to use electricity according to the needs of the consumer, who is the contract holder. For example, the contract holder may choose from a power saving menu such as "Normal / Moderate Power Saving / Full Power Saving." Power usage plans for different times of the day may also be proposed. Power usage plans may be proposed at any time based on past power usage records.

[0026] 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 for equipment replacement time for PV302 and storage battery 305 Recommend replacement times for equipment used by contractors.

[0027] <Contract management 203, customer information management 204> The contract management 203 manages the contract details and contract period of the contractor, and the customer information management 204 manages the name, address, contact details, etc. of the contractor.

[0028] <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 demand-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 demand-side integrated system 300, a demand forecast is systematically performed 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 in the storage battery 305 can be bought and sold between contractors or between the contractor and the storage battery service provider. By trading in such a power trading market, surplus power by time period has value like cryptocurrency and can be bought and sold. In addition, based on this demand forecast, it becomes 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.

[0029] Logistics Optimization 208, Delivery Route Optimization 209 In addition, the demand forecast 207 calculates logistics optimization information such as delivery schedules and delivery costs, optimizes delivery routes based on this information, traffic information, delivery vehicle information, etc., and instructs the delivery means on a delivery route appropriate to the delivery means. The delivery means may be any means capable of delivering storage batteries, such as a vehicle or a drone.

[0030] FIG. 4 shows an example of the hardware of the microcomputer in the battery management system 200 and the consumer side integrated system 300. The system 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, instead of the flash memory, an auxiliary storage device such as a hard disk may be included. The processor 1000 executes a program input from the storage device 2000 to perform processing for realizing the above-mentioned functions, 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 a 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.

[0031] 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 accompany 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, EVs, 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.

[0032] 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 variations 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. [Explanation of symbols]

[0033] 10: power generation company, 20: battery storage service provider, 30: consumer, 40: power transmission and distribution company, 200: battery storage management system, 300: consumer-side integrated system, 301: IED, 306: HEMS.

Claims

1. An energy storage service facility that stores electricity generated by a power generator in a storage battery via an energy transmission and distribution facility and delivers the electricity to consumers in an area 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; and based on information from the battery management system, the battery service equipment enables planned charging of the battery, and the consumer can buy and sell surplus electricity from the battery.

2. 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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