Distributed energy storage system and method based on remote demand dispatch response

Abstract

The present invention relates to the field of distributed energy storage technology, and discloses a distributed energy storage system and method based on remote demand scheduling response. The system consists of five parts: a scheduling center, a cloud platform, a master station, a slave station and a distributed small-scale power generation device. The present invention fully utilizes renewable energy, reduces dependence on traditional power grids, reduces energy waste, and integrates demand-side decentralized resources to make them an organic part of a virtual power plant, thereby achieving fast, flexible, accurate and intelligent interactive response with the distribution network in which it is located, helping the power grid to smooth out peak-to-valley differences, reduce the peak load burden of the power grid, and improve the security level of the power grid. At the same time, it has an efficient remote demand scheduling response mechanism, which can achieve coordinated optimization scheduling between different regions and different energy storage devices according to the power demand and the status of the energy storage device in different regions, thereby improving the flexibility and reliability of the power system.

Description

Technical Field

[0001] The present invention relates to the field of distributed energy storage technology, and more particularly to a distributed energy storage system and method based on remote demand dispatch response. Background Art

[0002] With the continuous growth of energy demand and the widespread use of renewable energy, the supply and demand balance of power systems faces increasing challenges. In traditional power systems, power dispatch relies primarily on centralized power plants and large power grids, which makes it difficult to flexibly respond to the access of distributed energy resources and changes in power demand in different regions. At the same time, the power generated by distributed small-scale power generation devices such as photovoltaic power generation and small wind power generation is intermittent and unstable, which easily leads to energy waste. Distributed energy storage systems, as an effective means of energy storage and management, can store electricity during low power demand and release it during peak power demand, helping to balance power supply and demand and improve energy utilization efficiency.

[0003] However, most current distributed energy storage systems lack efficient remote demand dispatch response mechanisms, making it impossible to achieve coordinated and optimized dispatch between different regions and different energy storage devices, making it difficult to fully leverage the advantages of distributed energy storage. Existing technologies have the following problems:

[0004] 1. The input of the energy storage system only accepts a single type of power input;

[0005] 2. Output is only allowed to be controlled locally or according to system setting parameters, and cannot accept remote scheduling command control from the cloud;

[0006] 3. It can only output AC single-phase or balanced three-phase loads and does not have the ability to carry unbalanced three-phase loads;

[0007] 4. The output is only AC or DC, and there is no simultaneous output of DC and AC power supply;

[0008] Therefore, the present invention discloses a distributed energy storage system and method based on remote demand scheduling response. Summary of the Invention

[0009] In order to overcome the above-mentioned defects of the prior art, the present invention provides a distributed energy storage system and method based on remote demand scheduling response to solve the problems existing in the above-mentioned background technology.

[0010] The present invention provides the following technical solution: a distributed energy storage system and method based on remote demand dispatch response, which consists of five major components: a dispatch center, a cloud platform, a master station, a slave station (distributed energy storage device), and a distributed small power generation device. The five major components include the following:

[0011] Dispatching center: This includes the municipal power dispatching center, building complex, and park dispatching centers. It dispatches all distributed energy storage system master stations connected to the dispatching center according to the power operation strategy and demand of the dispatching center.

[0012] Cloud platform: provides public access services for the dispatch center and the main station, and provides a channel for the two-way transmission of dispatch information and communication information between the dispatch center and the main station;

[0013] Master station: Deployed in a single building or complex, building group, or park, it manages and controls all distributed energy storage slave stations under its jurisdiction and accepts dispatch from the dispatch center.

[0014] Slave station: A distributed energy storage device installed in a building that is managed and controlled by the master station to which it is connected. Each slave station software system includes an energy storage battery charging management system that matches photovoltaic power generation, small wind power generation, and other power generation devices that utilize the building's surplus energy, and utilizes off-peak power from the grid, as well as lead-acid and lithium batteries, energy storage units, inverters, and communication modules.

[0015] Distributed small power generation device: provides power to the slave station and is suitable for power generation devices installed in civil buildings, such as photovoltaic power generation and small wind power generation devices.

[0016] The slave station includes the following:

[0017] First, the data is connected to the master station through the dispatching center and the dispatching platform, and then the data transmission control is carried out through the communication module and the MCU processor. The main sources of electricity for the slave station to store electricity are wind and solar power generation, grid distribution, elevator energy feedback and building surplus energy generation. The main sources of power for the slave station are wind and solar power generation, grid distribution, elevator energy feedback and building surplus energy generation. The grid power distribution is transmitted to the power access and power supply module through the grid power supply device. The elevator outputs DC through energy feedback. At the same time, wind and solar power generation are input into the power access and charging module through the wind and solar DC power generation device and the building surplus energy. The integrated control grid power supply device, elevator energy feedback DC output device, wind and solar DC power generation device and building surplus energy DC output device are charged and controlled through the MCU processor. When performing power generation and discharge control, the ambient temperature detection module will also be used to detect the ambient temperature, and the corresponding power generation device will be adjusted according to the temperature conditions to adjust the charging and discharging status to prevent the power generation device from overheating and causing the equipment to To solve the problem of reduced device life, the power access and charging module will be managed by the energy storage battery management system controlled by the MCU processor. The energy storage battery management system controls the charging speed of the energy storage battery by managing the power access and charging modules. When charging the energy storage battery, the MCU processor also detects the battery temperature of the energy storage battery through the integrated battery chamber temperature detection module to control the charging speed and discharge speed. The slave station converts the DC power of the energy storage battery into AC power through a three-phase four-bridge arm inverter circuit composed of IGBTs. At this time, the output control module controlled by the MCU processor is used to control the use of the output DC and AC power. At the same time, the output control module will transmit its output parameters to the MCU processor through the output parameter acquisition and detection module for centralized analysis, processing and control. The MCU and the corresponding protection circuit protect the IGBT drive circuit.

[0018] The master station includes the following contents:

[0019] The master station sends online broadcast information to multiple slave stations under its jurisdiction. The slave stations that receive the master station's online broadcast information will report their online information and the storage energy S available for scheduling to the master station. pi , can be switched to the loop current I of the energy storage power supply of this slave station si , active power P si , reactive power Q si And the apparent power S si Isoelectric parameters;

[0020] The master station reports information from the slave station and saves the slave station parameters in the area under its jurisdiction in real time. When the master station receives the start demand dispatch instruction from the dispatch center, it will start the dispatch according to the received dispatch quantity P. d , calculate and select the quantity P that meets the dispatch demand according to the system optimization response algorithm d Slave list combination;

[0021] When the master station sends a start demand control instruction to the slave stations in the response list combination, the slave stations in the list combination that receive the start demand scheduling instruction will switch the working mode to the demand scheduling working mode. Each slave station that completes the switch reports to the master station the active power P supplied by the slave station. i , reactive power Q i , apparent power S i When the master station receives the responses from all the slave stations in the response list, it calculates and summarizes them and uploads the total dispatch demand P of the master station that has completed the switch to the dispatch center. ∑ , P ∑ =P s1 +P s2 +……+P sn After the master station receives the stop demand dispatch instruction issued by the dispatch center, the master station will send a stop response demand dispatch instruction to each slave station in the response list. When each slave station in the list receives the stop demand dispatch instruction, it will switch the demand working mode to the normal working mode. After completing the switch, the slave station reports its working status to the master station and waits for the next demand dispatch instruction sent by the master station. After receiving the status reported by the slave station, the master station determines the power status stored in the slave station and enters the waiting state for the dispatch center to issue a demand dispatch instruction.

[0022] First, distributed small-scale power generation devices transmit their electric energy to slave stations for storage. By transmitting and storing the electric energy of distributed small-scale power generation devices in multiple regions to the corresponding storage slave stations, and transmitting the corresponding electric energy data stored in the slave stations to the designated regional master stations, multiple regional master stations are formed. At this time, the energy storage information is transmitted to the dispatching center through multiple master stations. When there is a demand dispatching demand, the dispatching center will give priority to issuing demand dispatching instructions to the master station with sufficient energy storage after calculation. The master station that receives the demand dispatching instruction dynamically selects the slave station combination with sufficient energy storage and optimal location to respond to the dispatching demand through the optimization algorithm, avoiding energy waste and redundant transmission. The energy storage capacity change threshold triggers the data reporting mechanism, reducing invalid communication while ensuring dispatching accuracy and reducing operating costs. The four-level architecture of dispatching center-cloud platform-master station-slave station realizes distributed management. The master station independently manages the slave stations in its jurisdiction, reducing the center load and improving the response speed. The cloud platform provides a two-way communication channel to ensure the real-time transmission of dispatching instructions and status data, enhancing the system's fault tolerance.

[0023] The sources of energy storage power provided by the slave station include the following:

[0024] Utilize the building's solar energy, wind energy, and other waste heat, waste cooling, waste energy generation, and municipal off-peak electricity to charge each distributed energy storage station; install renewable energy generation devices such as solar power generation modules and small wind turbines on the building's roof, sky, or other available sites based on the building's own characteristics;

[0025] Install an elevator energy feedback device with built-in energy storage connected to the elevator braking resistor in the elevator machine room;

[0026] Other small or micro generators that utilize surplus energy, such as small generators that utilize surplus water energy from cooling towers and are installed on roofs or rooftops, and small generators that utilize geothermal energy;

[0027] Utilize the off-peak electricity of the grid. For projects with peak-valley-flat electricity prices, if the storage capacity of the distributed energy storage device is low during the off-peak period, the distributed energy storage device will be charged with power from the grid during the off-peak period; as a supplement to intermittent and fluctuating solar power generation, wind power generation, etc.

[0028] The operation method of the distributed energy storage system based on remote demand dispatch response includes the following contents:

[0029] S1. First, the distributed small power generation devices in the area under the jurisdiction of the slave station will power on the slave station in the area under its jurisdiction. The slave station will initialize the slave station configuration according to the settings and handle other tasks of the slave station, including charging energy storage, controlling the charging and discharging speed of the energy storage battery, and the temperature control module, controlling the temperature, and also the battery temperature control. This process continues. During this process, the online broadcast information of the master station will be received. The broadcast information of the master station is used to broadcast to the slave stations under its jurisdiction. If the broadcast information of the master station is not received, it will continue to process. The master station will process the tasks of the slave station, but when the master station information is detected, it will immediately send the online information of the slave station to the master station. The master station will integrate the online status of the slave stations in the subordinate areas. After the master station receives the online information of the corresponding slave station, the master station will send the slave station a report energy storage data command. If a slave station has recently responded to the dispatch instruction and the remaining energy storage is less than the set energy storage, the master station will not send the report energy storage data command to this type of slave station, and the slave station will continue to perform other tasks of the slave station. When the slave station receives the report energy storage data command, it will go online. The master station reports the energy storage data of the slave station. After the master station receives the energy storage data of the slave station, it will adjust according to the instructions issued by the dispatch center. The master station will classify the slave stations in the uploaded energy storage data and control the output and stop of the subordinate slave stations according to the dispatch instructions. If the slave station does not receive the dispatch instruction sent by the master station, the slave station will measure the energy storage. When the change in the dispatchable energy storage amount of the slave station is less than the set dispatchable energy storage amount, the slave station will continue to perform the slave task. When it is greater than the set dispatchable energy storage amount, it will continue to upload the storage amount of the slave station. When the scheduling instruction reaches the designated slave station, the slave station starts to respond to the scheduling instruction and sends the master station the information that the slave station has responded to the scheduling instruction. When the master station detects that the slave station has completed the control of the scheduling instruction, the slave station continues to complete the slave station task and continues to receive the master station's online broadcast information. When the master station's broadcast information is not received for three consecutive times, the slave station sends the master station's online information. When the master station's scheduling instruction is received again at this time, the slave station continues to accept the master station's scheduling operation. When it receives it, it sends the master station's online information.

[0030] S2. When the master station is powered on, it will be initialized and configured according to the set parameters, and then the online information of the master station will be broadcasted to the system. When the master station receives the online information of the slave station, it will send a command to report the schedulable energy storage parameters to the slave station and set the slave station to the online state. When the master station fails to receive the online information of the slave station that has been set to online for three consecutive times, the slave station will be set to the offline state; when the slave station fails to receive the online information of the master station within the set time limit for three consecutive times, the slave station will change to the offline working state, and the slave station will process other tasks of the station at this time; when the set time for broadcasting the online information of the master station to the system is reached, the master station will broadcast the online information of the master station to the system. If it is not reached, the master station will continue to process other tasks of the master station. When the master station receives the online information of the slave station, the master station will send The slave station sends out an instruction to report the energy storage parameters available for dispatch and sets the slave station to an online state. When the master station does not receive the data uploaded by the slave station that has been set to an online state, the master station determines whether the waiting time has timed out. If the slave station is not detected to be online for three consecutive times, the slave station will be set to an offline state. If the online information of the slave station that has been set to an offline state is received, the slave station will be reset to an online state. When the data information uploaded by the slave station is received, the master station will save the total amount of energy storage available for dispatch at this station and calculate whether the change in the total amount of energy storage that can be dispatched at this station is less than the set dispatchable energy storage. If it is not greater than the set dispatchable energy storage, the slave station will be controlled to continue to execute other tasks within this slave station. If the online information of the slave station has not been received for three consecutive times, the master station will set the slave station to an offline state and will not send any request to upload slave station information and dispatch commands to the slave station.

[0031] S3. When the master station is powered on, it is also necessary to report the online information of the station to the dispatching center for confirmation by the dispatching center. Before receiving the dispatching center's notification that the station has been put into online status, the master station continues to report online information regularly. When receiving the dispatching center's request to upload the available dispatchable power instruction, and the total amount of dispatchable energy storage collected by the master station is greater than the set dispatchable energy storage, the master station reports to the dispatching center the total amount of dispatchable power of the slave stations in the master station area. After completing the total power report, if there are no other instructions, each master station will process other tasks of its own station and confirm whether it has arrived at the time to report the online time of the station to the dispatching center. When it is confirmed that it has arrived, the master station's online information will be reported to the dispatching center. At the same time, if it has not arrived at the time to upload the online time of the station to the platform, it will confirm whether it has received the dispatching center's request to upload the available dispatchable power instruction.

[0032] S4. When the master station does not receive the demand dispatch instruction, it continues to process other tasks of the master station. When it receives the demand dispatch instruction, the master station calculates and analyzes the optimal slave station combination that meets the response dispatch requirements through the built-in most economical and reasonable algorithm, and then issues a start dispatch instruction to the analyzed slave station combination. When the slave station receives the dispatch instruction, the slave station in the combination controls the output according to the received slave station dispatch instruction to enter the dispatch response state. The master station confirms whether it has received responses from all slave stations in the combination. When the master station receives responses from all slave stations in the combination, it reports the demand situation that the master station has responded to to the dispatch center. ; When the master station does not receive feedback from a slave station in the response combination within the specified time limit, the master station confirms whether it is caused by a waiting timeout. When it is confirmed that the waiting timeout has occurred, the master station recalculates and analyzes the information of the slave stations that have received feedback, selects the best response slave station combination and issues a start response instruction. After receiving feedback from all slave stations in the combination, the master station reports to the dispatch center the demand situation that has been responded to by the master station; after receiving feedback from all slave stations in the combination, the master station reports to the dispatch center the demand situation that has been responded to by the station, and the master station and the slave station each complete the task within the station, thereby completing the start of the demand scheduling task.

[0033] S5. The master station in the start demand scheduling state will send a stop demand scheduling instruction to each slave station in the response list after receiving the stop demand scheduling instruction from the dispatching center. When each slave station in the list that receives the stop demand scheduling instruction switches the demand working mode to the normal working mode and completes the switch, the slave station reports its working status to the master station and waits for the next demand scheduling instruction sent by the master station. After receiving the status and energy storage parameters reported by the slave station, the master station updates the stored working status and energy storage parameters of each slave station in real time, and then enters the waiting state for the dispatching center to issue a demand scheduling instruction.

[0034] Technical effects and advantages of the present invention:

[0035] The present invention fully utilizes renewable energy, reduces dependence on traditional power grids, reduces energy waste, and integrates distributed resources on the demand side through the combination of distributed small-scale power generation devices and distributed energy storage systems. It integrates distributed resources on the demand side to make them an organic part of the virtual power plant, and achieves fast, flexible, accurate, and intelligent interactive response with the distribution network in which it is located, helping the power grid to smooth out peak-to-valley differences, reduce the peak load burden of the power grid, and improve the security level of the power grid.

[0036] By having an efficient remote demand dispatch response mechanism, the present invention can achieve coordinated optimization dispatch between different regions and different energy storage devices according to the power demand and status of the energy storage devices in different regions, thereby improving the flexibility and reliability of the distribution system.

[0037] The present invention can monitor and control the working status of the equipment in real time by equipping the slave station with an ambient temperature detection module, a battery compartment temperature detection module, and an IGBT drive and protection circuit, thereby preventing the equipment from overheating, overcharging, over-discharging, and other problems, and ensuring the safe operation of the equipment.

[0038] Through data analysis and calculation at the dispatching center and the main station, the present invention can achieve refined management of energy, formulate optimal energy dispatching strategies according to different needs and scenarios, reduce energy costs, provide on-site consumption channels for local renewable energy power generation, reduce wind power curtailment, solar power curtailment, and electricity curtailment, and reduce the amount of "three abandoned" electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 Schematic diagram of the overall system architecture of the present invention.

[0040] Figure 2 It is a schematic diagram of the main station structure of the present invention.

[0041] Figure 3 Schematic diagram of the slave station structure of the present invention.

[0042] Figure 4 Schematic diagram of the master station workflow of the present invention.

[0043] Figure 5 Schematic diagram of the slave station operation in the system workflow of the present invention.

[0044] Figure 6 Schematic diagram of the main station operation in the system workflow of the present invention. DETAILED DESCRIPTION

[0045] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. In addition, the forms of the various structures described in the following embodiments are merely examples. The distributed energy storage system and method based on remote demand scheduling response involved in the present invention are not limited to the various structures described in the following embodiments. All other embodiments obtained by ordinary technicians in this field without making creative work fall within the scope of protection of the present invention.

[0046] Reference Figures 1-6 The present invention provides a distributed energy storage system and method based on remote demand dispatch response, which consists of five parts: a dispatch center, a cloud platform, a master station, a slave station (distributed energy storage device), and a distributed small power generation device. The five parts include the following contents:

[0047] Dispatching center: This includes the municipal power dispatching center, building complex, and park dispatching centers. It dispatches all distributed energy storage system master stations connected to the dispatching center according to the power operation strategy and demand of the dispatching center.

[0048] Cloud platform: provides public access services for the dispatch center and the main station, and provides a channel for the two-way transmission of dispatch information and communication information between the dispatch center and the main station;

[0049] Master station: Deployed in a single building or complex, building group, or park, it manages and controls all distributed energy storage slave stations under its jurisdiction and accepts dispatch from the dispatch center.

[0050] Slave station: A distributed energy storage device installed in a building that is managed and controlled by the master station to which it is connected. Each slave station's software system includes a battery charging management system that matches photovoltaic power generation, small wind power generation, and other power generation devices that utilize building surplus energy, and utilizes grid off-peak power for charging, as well as lead-acid and lithium batteries, energy storage units, inverters, and communication modules. The sources of energy storage power provided by the slave station include the following:

[0051] Utilize the building's solar energy, wind energy, and other waste heat, waste cooling, waste energy generation, and municipal off-peak electricity to charge each distributed energy storage station; install renewable energy generation devices such as solar power generation modules and small wind turbines on the building's roof, sky, or other available sites based on the building's own characteristics;

[0052] Install an elevator energy feedback device with built-in energy storage connected to the elevator braking resistor in the elevator machine room;

[0053] Other small or micro generators that utilize surplus energy, such as small generators that utilize surplus water energy from cooling towers and are installed on roofs or rooftops, and small generators that utilize geothermal energy;

[0054] Utilize off-peak electricity. For projects with peak-valley-flat electricity pricing, if the storage capacity of distributed energy storage devices is low during off-peak periods, the distributed energy storage devices can be charged with power from the grid during off-peak periods. This serves as a supplement to the intermittent and fluctuating nature of solar and wind power generation.

[0055] Each slave station has a built-in charging energy storage access interface that matches photovoltaic power generation, small wind power generation and other power generation devices that use building surplus energy and municipal power supply. The software system of each slave station has a storage battery charging management system that matches photovoltaic power generation, small wind power generation and other power generation devices that use building surplus energy and uses grid valley power charging.

[0056] Distributed small power generation device: provides power to the slave station and is suitable for power generation devices installed in civil buildings, such as photovoltaic power generation and small wind power generation devices. The main targets of distributed energy storage power supply in buildings are:

[0057] (1) Electrical loads that are not sensitive to power switching, such as lighting in basement parking lots, corridors, elevator halls, ordinary office spaces, equipment rooms, etc.

[0058] (2) Restarting after a short power outage will have no or very little impact, such as water supply pumps, air supply fan coil units of air conditioners in ordinary office spaces, return air fans, fresh air fans, etc.

[0059] The slave station includes the following:

[0060] First, the slave station is connected to the master station through the built-in wired or wireless module, and then the data transmission is controlled through the communication module and the MCU processor. The main sources of electric energy for the slave station to store electric energy are wind and solar power generation, grid distribution, elevator energy feedback and building surplus energy generation, which are the main sources of power for the slave station. The grid distribution is transmitted to the power access and power supply module through the grid power supply device. The elevator outputs DC through energy feedback. At the same time, wind and solar power generation are input into the power access and charging module through the wind and solar DC power generation device and the building surplus energy. The MCU processor is used to perform integrated control of the grid power supply device, the elevator energy feedback DC output device, the wind and solar DC power generation device and the building surplus energy using the DC output device for charging control. When performing power generation control, the ambient temperature detection module will also be used to detect the ambient temperature, and the corresponding power generation device will be adjusted to adjust the charging state according to the temperature conditions to prevent the power generation device from overheating and causing a decrease in the life of the device. The power access and charging module will be managed by the energy storage battery management system controlled by the MCU processor. The energy storage battery management system manages the power access and charging module and the energy storage battery. The module controls the charging speed of the energy storage battery. When charging the energy storage battery, the MCU processor also integrates a battery chamber temperature detection module to detect the battery temperature of the energy storage battery to control the charging speed and discharge speed. When the energy storage battery is discharging, the MCU processor will continue to protect the three-phase four-bridge arm inverter output through the IGBT drive and protection circuit. The three-phase four-bridge arm inverter output converts the DC power of the energy storage battery into AC power. At this time, the output control module controlled by the MCU processor is used to control the use of the output DC and AC power. At the same time, the output control module The block will transmit its output parameters to the MCU processor for centralized processing through the output parameter acquisition and detection module. The energy storage AC output converter adopts a three-phase four-bridge arm design with 100% unbalanced load capacity. When the load is pure single-phase load, three-phase balanced load or unbalanced load, it has four-quadrant operation capability, realizing active and reactive power decoupling control and energy bidirectional control function. When a distributed energy storage unit has reached the set release low value, there are output slave units within the management range of this master station, and the optimized output slave is selected to notify the optimization algorithm to select the slave output. If there are no slave units with output within the management scope of this master station, the dispatching center will be notified of the output amount available for dispatch by this master station. By integrating photovoltaic, wind energy, building surplus energy (such as cooling tower water energy, geothermal energy) and municipal off-peak electricity, the dependence on a single energy source can be reduced through multi-energy complementarity. In particular, charging during off-peak periods can significantly reduce electricity costs (utilization of peak-valley electricity price differences). Elevator energy feedback devices can recover braking energy, and building surplus energy generator sets (such as cooling tower water energy, geothermal energy) can further tap potential energy and improve overall energy utilization.

[0061] The main site includes the following:

[0062] The master station sends online broadcast information to multiple slave stations under its jurisdiction. The slave stations that receive the master station's online broadcast information will report their online information and the storage energy S available for scheduling to the master station. pi , can be switched to the loop current I of the energy storage power supply of this slave station si , active power P si , reactive power Q si And the apparent power S si Isoelectric parameters;

[0063] The master station saves or updates the slave station parameters received in its jurisdiction in real time. When receiving the start demand dispatch instruction sent by the dispatch center, the master station will start the dispatch according to the received dispatch demand P. d , calculate and select the quantity P that meets the dispatch demand according to the system optimization response algorithm d Slave response list combination S[P s1 ,P s2 ,……,P sn ];

[0064] When the master station sends a start demand control instruction to the slave stations in the response list combination, the slave stations in the list that receive the start demand scheduling instruction will switch the working mode to the demand scheduling working mode. Each slave station that completes the switch reports to the master station the active power P supplied by the slave station. si , reactive power Q si , apparent power S si When the master station receives the responses from all the slave stations in the response list, it calculates and summarizes them and uploads the total dispatch demand P of the master station that has completed the switch to the dispatch center. ∑ , P ∑ =P s1 +P s2 +……+P snAfter the master station receives the stop demand dispatch instruction issued by the dispatch center, the master station will send a stop response demand dispatch instruction to each slave station in the response list. When each slave station in the list that receives the stop demand dispatch instruction switches the demand working mode to the normal working mode and completes the switch, the slave station reports its working status to the master station and waits for the next demand dispatch instruction sent by the master station. After the master station receives the status and energy storage parameters reported by the slave station, it updates the stored working status and energy storage parameters of each slave station in real time, and then enters the state of waiting for the dispatch center to issue a demand dispatch instruction. First, distributed small-scale power generation devices transmit their electric energy to slave stations for storage. By transmitting and storing the electric energy of distributed small-scale power generation devices in multiple regions to the corresponding storage slave stations, and transmitting the corresponding electric energy data stored in the slave stations to the designated regional master stations, multiple regional master stations are formed. At this time, the energy storage information is transmitted to the dispatching center through multiple master stations. When there is a demand dispatching demand, the dispatching center will give priority to issuing demand dispatching instructions to the master station with sufficient energy storage after calculation. The master station that receives the demand dispatching instruction dynamically selects the slave station combination with sufficient energy storage and optimal location to respond to the dispatching demand through the optimization algorithm, avoiding energy waste and redundant transmission. The energy storage capacity change threshold triggers the data reporting mechanism, reducing invalid communication while ensuring dispatching accuracy and reducing operating costs. The four-level architecture of dispatching center-cloud platform-master station-slave station realizes distributed management. The master station independently manages the slave stations in its jurisdiction, reducing the center load and improving the response speed. The cloud platform provides a two-way communication channel to ensure the real-time transmission of dispatching instructions and status data, enhancing the system's fault tolerance.

[0065] The sources of energy storage power provided by the slave station include the following:

[0066] Utilize the building's solar energy, wind energy, and other waste heat, waste cooling, waste energy generation, and municipal off-peak electricity to charge each distributed energy storage station; install renewable energy generation devices such as solar power generation modules and small wind turbines on the building's roof, sky, or other available sites based on the building's own characteristics;

[0067] Install an elevator energy feedback device with built-in energy storage connected to the elevator braking resistor in the elevator machine room;

[0068] Other small or micro generators that utilize surplus energy, such as small generators that utilize surplus water energy from cooling towers and are installed on roofs or rooftops, and small generators that utilize geothermal energy;

[0069] Utilizing off-peak electricity from the grid, for projects with peak-valley-flat electricity prices, if the storage capacity of the distributed energy storage device is low during off-peak periods, the distributed energy storage device can be charged with power from the grid during off-peak periods. As a supplement to the intermittent and fluctuating nature of solar and wind power generation, the three-phase four-bridge-arm inverter output supports 100% unbalanced loads, and the four-quadrant operation capability enables active / reactive power decoupling control, adapting to complex power usage scenarios (such as mixed loads of single-phase lighting and three-phase equipment). Battery room temperature detection and dynamic charging speed adjustment extend the life of the energy storage unit and reduce maintenance frequency.

[0070] Operation method of distributed energy storage system based on remote demand dispatch response,

[0071] S1. First, the distributed small power generation devices in the area under the jurisdiction of the slave station will power on the slave station in the area under its jurisdiction. The slave station will initialize the slave station configuration according to the settings and handle other tasks of the slave station, including charging energy storage, controlling the charging and discharging speed of the energy storage battery, and the temperature control module, controlling the temperature, and also the battery temperature control. This process continues. During this process, the online broadcast information of the master station will be received. The broadcast information of the master station is used to broadcast to the slave stations under its jurisdiction. If the broadcast information of the master station is not received, the processing will continue. The slave station is not performing its task, but when the master station information is detected, it will immediately send the online information of the slave station to the master station. The master station will integrate the online status of the slave stations in the subordinate area. After the master station receives the online information of the corresponding slave station, it will send the slave station a command to report the energy storage data. When a slave station has recently been dispatched and the remaining energy storage is less than the set energy storage, the master station will not send the command to report the energy storage data to this type of slave station, and the slave station will continue to perform other tasks of the slave station. When the slave station receives the command to report the energy storage data, it will report The energy storage data of this slave station, after the master station receives the energy storage data of the slave station, the master station will adjust it according to the instructions issued by the dispatch center. The master station will classify the slave stations in the uploaded energy storage data and control the output and stop of the subordinate slave stations according to the dispatch instructions. If the slave station does not receive the dispatch instruction sent by the master station, the slave station will measure the energy storage. When the dispatchable energy storage amount of this slave station changes by more than ±10%, the 10% is a settable value. The specific setting is set according to local conditions. When it is less than ±10%, the slave station continues to execute the slave station. task, and when it is greater than ±10%, it continues to upload the energy storage data of this slave station. When the dispatch instruction reaches the designated slave station, the slave station starts to dispatch. When the master station detects that the slave station has completed the control of the dispatch instruction, the slave station continues to complete the task of this slave station and continues to receive the online broadcast sound of the master station. When the master station's broadcast information is not received for three consecutive times, the slave station sends the online information of this slave station to the master station. When the dispatch instruction of the master station is received again at this time, the slave station continues to accept the dispatch operation of the master station. When it is received, it sends the online information of this slave station to the master station.

[0072] S2. When the master station is powered on, it will initialize the configuration of the master station according to the set parameters, and then broadcast the online information of the master station to the system. When the master station receives the online information of the slave station, it will send a command to report the schedulable energy storage parameters to the slave station and set the slave station to online status. When the master station fails to receive the online information of the slave station that has been set to online for three consecutive times, the slave station will be set to offline status; when the slave station fails to receive the online information of the master station within the set time limit for three consecutive times, the slave station will change to offline working status, and the slave station will process other tasks of the station at this time; when the set time for broadcasting the online information of the master station to the system is reached, the master station will broadcast the online information of the master station to the system. If it is not reached, the master station will continue to process other tasks of the master station. When the master station receives the online information of the slave station, the master station will send a command to report the schedulable energy storage parameters to the slave station and set the slave station to online status. When the master station does not receive the data uploaded by the slave station that has been set to online status, the master station determines whether the waiting time has timed out. If the connection If the slave station is not detected to be online for three consecutive times, the slave station will be set to offline state. If the online information of the slave station set to offline state is received, the slave station will be set to online state again. When the data information uploaded by the slave station is received, the master station will save the total amount of energy storage available for dispatch at the station and calculate whether the change in the total amount of energy storage available for dispatch at the station is less than the set dispatchable energy storage. If it is not greater than the set dispatchable energy storage, the slave station will be controlled to continue to perform other tasks within the slave station. If the slave station online information is not received for three consecutive times, the master station will set the slave station to offline state and will not send any request to upload slave station information and scheduling commands to the slave station. If it is online, the slave station will upload again and be set to online state again. When the data information uploaded by the slave station is received, the master station will save the total amount of energy storage available for dispatch at the station and calculate whether the change in the total amount of energy storage available for dispatch at the station is greater than ±10%. The 10% is a configurable value. The specific setting is set according to local conditions. When it is not greater than ±10%, the slave station will be controlled to continue to perform other tasks within the slave station.

[0073] S3. When the master station is powered on, it also reports the online information of the station to the demand dispatching platform for confirmation. When it is not needed, the master station continues to report the online information. When it receives the request from the demand dispatching platform to upload the available dispatching power instruction, the total dispatching energy storage collected by the master station is greater than ±10% of the slave station. The 10% is a configurable value. The specific setting is set according to the local situation. The total amount of electricity available for dispatch of the slave stations in the master station area is reported to the demand dispatching platform. After completing the total amount of electricity reporting, if there is no other instruction, Each master station processes other tasks of its own station and confirms whether the online time for uploading the station to the platform has arrived. When it is confirmed that the time has arrived, the online information of the master station will be uploaded to the demand scheduling platform. At the same time, if the online time for uploading the station to the platform has not arrived, it will confirm whether the demand scheduling platform has received the request to upload the available dispatchable power instruction. When a distributed energy storage unit has reached the set release low value and there are slave units that can output within the management range of this master station, the optimized output slave will be selected and the slave output selected by the optimization algorithm will be notified;

[0074] S4. When the master station does not receive the demand scheduling instruction, it continues to process other tasks of the master station. When it receives the demand scheduling instruction, it uses the optimization algorithm to calculate and select the most economical and reasonable algorithm to analyze and form the optimal slave station combination list that responds to the scheduling requirements. At this time, the master station sends a start scheduling instruction to the analyzed slave station combination list. After the slave station receives the scheduling instruction, it confirms whether it has received a response from the slave station. When it receives responses from all slave stations in the combination, it reports the demand situation that the master station has responded to to the demand scheduling platform. When it does not receive feedback from all slave stations, it confirms whether it is caused by a waiting timeout. When it is confirmed that the waiting timeout has occurred, it recalculates and analyzes the information of the slave stations that have received feedback, selects the slave station with the best response, and sends a start response instruction. When it receives the response from the combination, it confirms whether the response from the slave station is received. If all slave stations feedback, the demand situation that the master station has responded to is reported to the demand scheduling platform. If the waiting time is not timed out when receiving the slave station feedback, the demand response instruction is reissued to the analyzed slave station combination and the slave station feedback is received again. If no feedback is received when receiving feedback from all slave stations in the combination, it is confirmed whether the waiting time has timed out. When it is confirmed that the waiting time has timed out, the slave stations in the combination that have not received feedback information are set to offline state, and the optimal response slave is selected based on the information of the slave stations that have received feedback and a start response instruction is issued. After receiving feedback from all slave stations in the combination, the demand situation that the station has responded to is reported to the demand scheduling platform. After completion, the master station and the slave station each complete the task within the station, and the demand scheduling startup task is completed.

[0075] As soon as the master station receives the start output scheduling instruction and output power value from the dispatching center, it immediately selects the optimal combination of distributed energy storage slave stations within the jurisdiction of the master station that responds to the scheduling through the optimization algorithm and sends an output instruction to them. The slave station that receives the output instruction controls the output of the station according to the master station's instruction value and feedbacks it to the master station. After summarizing the control results, the master station feeds back the control results to the dispatching center. Each slave station that responds to the scheduling output periodically or when the energy storage capacity decreases by 10%. The 10% is a configurable value. The specific setting is set according to local conditions. This proportion value can be modified according to on-site conditions to report the energy storage data of the slave station to the master station. After the master station receives the stop output scheduling instruction from the dispatching center, it sends a stop output scheduling instruction to the slave stations in the optimized combination. The slave stations that receive the stop output instruction stop energy storage output and switch to standby mode.

[0076] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.

[0077] Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict.

[0078] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A distributed energy storage system based on remote demand dispatch response, characterized by: It consists of five parts: dispatching center, cloud platform, master station, slave station and distributed small power generation equipment. The five parts include the following contents: Dispatching center: This includes the municipal power dispatching center, building complex, and park dispatching centers. It dispatches all distributed energy storage system master stations connected to the dispatching center according to the power operation strategy and demand of the dispatching center. Cloud platform: provides public access services for the dispatch center and the main station, and provides a channel for the two-way transmission of dispatch information and communication information between the dispatch center and the main station; Master station: Deployed in a single building or complex, building group, or park, it manages and controls all distributed energy storage slave stations under its jurisdiction and accepts dispatch from the dispatch center. Slave station: A distributed energy storage slave station device installed in a building and managed and controlled by the master station to which it is connected. The software system of each slave station includes an energy storage battery charging management system that matches photovoltaic power generation, small wind power generation and other power generation devices that utilize the building's surplus energy and utilizes grid off-peak power for charging, as well as energy storage units, inverters, and communication modules. Distributed small power generation device: provides power to the slave station and is suitable for power generation devices installed in civil buildings, including photovoltaic power generation and small wind power generation devices; The slave station includes the following: First, the slave station is connected to the master station through the built-in wired or wireless communication module, and then the data transmission is controlled through the communication module and the MCU processor. The sources of electric energy for the slave station to store electric energy include wind and solar power generation, grid distribution, elevator energy feedback and building surplus energy generation. The grid distribution is transmitted to the power access and power supply module of the slave station through the grid power supply device, elevator energy feedback device, wind and solar power generation device, and building surplus energy generation device. The MCU processor of the slave station controls the charging of the integrated control grid power supply device, elevator energy feedback DC output device, wind and solar DC power generation device and building surplus energy utilization DC output device. When performing power generation and discharge control, the ambient temperature detection module will also detect the ambient temperature, and adjust the corresponding power generation device according to the temperature conditions to adjust the charging and discharge state parameters to prevent the power generation and discharge devices from overheating and causing a decrease in the life of the device. Power access and The charging module manages power access, charging modules, and energy storage batteries through the energy storage battery management system controlled by the MCU processor. The energy storage battery management system controls the charging speed of the energy storage battery by managing the power access and charging modules. When charging and discharging the energy storage battery, the MCU processor also detects the battery temperature of the energy storage battery through the battery chamber temperature detection module to control the charging speed and discharge speed. The slave station converts the DC power of the energy storage battery into AC power through a three-phase four-bridge-arm inverter circuit composed of IGBTs. At this time, the output control module controlled by the MCU processor controls the use of the output DC and AC power. At the same time, the output control module transmits its output parameters to the MCU processor through the output parameter acquisition and detection module for centralized analysis, processing, and control. The MCU and the corresponding protection circuit protect the IGBT drive circuit. The main station includes the following contents: When the master station is powered on or reaches the set time limit, it will send the master station online broadcast information to the subordinate slave stations. The slave stations that receive the master station online broadcast information will report the slave station online information and the storage energy S available for scheduling to the master station. pi , can be switched to the loop current I of the energy storage power supply of this slave station si , active power P si , reactive power Q si And the apparent power S si Power consumption parameters; The master station saves or updates the slave station parameters received in its jurisdiction in real time. When receiving the start demand dispatch instruction sent by the dispatch center, the master station will start the dispatch according to the received dispatch demand P. d , calculate and select the dispatch demand P according to the system optimization response algorithm d Slave response list combination S[P s1 ,P s2 ,……,P sn ]; When the master station sends a start demand control instruction to the slave stations in the response list, the slave stations in the list combination that receive the start demand scheduling instruction will switch the working mode to the demand scheduling working mode. Each slave station that completes the switch reports to the master station the active power P supplied by the slave station. si , reactive power Q si , apparent power S si When the master station receives the responses from all the slave stations in the response list, it calculates and summarizes them and uploads the total dispatch demand P of the master station that has completed the switch to the dispatch center. ∑ , P ∑ =P s1 +P s2 +……+P sn After the master station receives the stop demand dispatch instruction issued by the dispatch center, the master station will send a stop response demand dispatch instruction to each slave station in the response list. When each slave station in the list receives the stop demand dispatch instruction, it will switch the demand working mode to the normal working mode and report the working status of the station to the master station, waiting for the next demand dispatch instruction sent by the master station. After receiving the status and energy storage parameters reported by the slave station, the master station will update the stored working status and energy storage parameters of each slave station in real time. After that, the master station enters the state of waiting for the dispatch center to issue a demand dispatch instruction.

2. The distributed energy storage system based on remote demand dispatch response according to claim 1, characterized in that: First, distributed small-scale power generation devices transmit their electricity to slave stations for storage. By transmitting and storing the electricity of distributed small-scale power generation devices in multiple regions to corresponding storage slave stations, and transmitting the corresponding electricity data stored in the slave stations to designated regional master stations, multiple regional master stations are formed. At this time, the energy storage information is transmitted to the dispatching center through multiple master stations. When there is a demand dispatching requirement, the dispatching center will preferentially issue demand dispatching instructions to the master station with sufficient energy storage after calculation. The master station that receives the demand dispatching instruction dynamically selects the slave station combination with sufficient energy storage and optimal location to respond to the dispatching requirement through the optimization algorithm, avoiding energy waste and redundant transmission. The change in energy storage capacity exceeding the set threshold will trigger the data reporting mechanism, reducing invalid communication while ensuring dispatching accuracy and lowering operating costs. The four-level architecture of dispatching center-cloud platform-master station-slave station realizes distributed management. The master station independently manages the slave stations in its jurisdiction, reducing the center load and improving response speed. The cloud platform provides a two-way communication channel to ensure the real-time transmission of dispatching instructions and status data, enhancing the system's fault tolerance.

3. The distributed energy storage system based on remote demand dispatch response according to claim 2, characterized in that: The sources of energy storage power provided by the slave station include the following: Utilize the building's solar energy, wind energy, and other waste heat, waste cooling, waste energy generation, and municipal off-peak electricity to charge each distributed energy storage station; install renewable energy power generation devices such as solar power generation modules and small wind turbines on the building's roof, sky, or other available sites based on the building's own characteristics; Install an elevator energy feedback device with built-in energy storage connected to the elevator braking resistor in the elevator machine room; Other small or micro generators utilizing surplus energy, including small generators using surplus water energy from cooling towers installed on roofs or rooftops, and small generators using geothermal energy; Utilize the off-peak electricity of the grid. For projects with peak-valley-flat electricity prices, including when the storage capacity of distributed energy storage devices is low during off-peak periods, the grid will be used to power the distributed energy storage devices during off-peak periods; as a supplement to intermittent and fluctuating power generation devices such as solar power generation and wind power generation.

4. A method for operating a distributed energy storage system based on remote demand dispatch response, implemented in the distributed energy storage system based on remote demand dispatch response according to claim 3, characterized in that: Includes the following: S1. First, the distributed small power generation devices in the area under the jurisdiction of the slave station will power on the slave station in the area under its jurisdiction. The slave station will initialize the slave station configuration according to the settings and handle other tasks of the slave station, including charging energy storage, controlling the charging and discharging speed of the energy storage battery, and the temperature control module, controlling the temperature, and also the battery temperature control. This process continues. During this process, the online broadcast information of the master station will be received. The broadcast information of the master station is used to broadcast to the slave stations under its jurisdiction. When the broadcast information of the master station is not received, the slave station will continue to process. Station task, but when the master station information is detected, it will immediately send the online information of the slave station to the master station. The master station will integrate the online status of the slave stations in the subordinate area. After the master station receives the online information of the corresponding slave station, the master station will send a report energy storage data command to the slave station. When a slave station has recently responded to the dispatch instruction and the remaining energy storage is less than the set energy storage, the master station will not send the report energy storage data instruction to this type of slave station, and the slave station will continue to perform other tasks of the slave station. When a slave station receives the report energy storage data instruction, it will report the Energy storage data. After the master station receives the energy storage data from the slave station, the master station will adjust according to the instructions issued by the dispatch center. The master station will classify the slave stations in the uploaded energy storage data and control the output and stop of the subordinate slave stations according to the dispatch instructions. If the slave station does not receive the dispatch instruction sent by the master station, the slave station will measure the energy storage. When the dispatchable energy storage amount of the slave station is less than the set dispatchable energy storage amount, the slave station will continue to perform the slave station task. When it is greater than the set dispatchable energy storage amount, the slave station will continue to upload the energy storage data of the slave station. When the dispatch instruction After the command reaches the designated slave station, the slave station starts to respond to the scheduling command and sends the master station a message that the slave station has responded to the scheduling command. When the master station detects that the slave station has completed the control of the scheduling command, the slave station continues to complete the slave station task and continues to receive the master station's online broadcast information. If the master station's online broadcast information is not received for three consecutive times within the set time limit, the slave station will actively send the master station's online information. When the master station's scheduling command is received again at this time, the slave station will continue to accept the master station's scheduling operation. When it receives it, it will send the master station's online information. S2. When the master station is powered on, it will be initialized and configured according to the set parameters, and then the online information of the master station will be broadcasted to the system. When the master station receives the online information of the slave station, it will send a command to report the schedulable energy storage parameters to the slave station and set the slave station to the online state. When the master station fails to receive the online information of the slave station that has been set to online for three consecutive times, the slave station will be set to the offline state; when the slave station fails to receive the online information of the master station within the set time limit for three consecutive times, the slave station will change to the offline working state, and the slave station will process other tasks of the station at this time; when the set time for broadcasting the online information of the master station to the system is reached, the master station will broadcast the online information of the master station to the system. If it has not arrived, the master station will continue to process the Other tasks of the master station: when the master station receives the online information of the slave station, the master station will send an instruction to the slave station to report the energy storage parameters available for dispatch and set the slave station to the online state. When the master station does not receive the data uploaded by the slave station that has been set to the online state, the master station determines whether the waiting time has timed out. If the slave station is not detected to be online for three consecutive times, the slave station will be set to the offline state. If the online information of the slave station that has been set to the offline state is received, the slave station will be reset to the online state. When the data information uploaded by the slave station is received, the master station will save the total amount of energy storage available for dispatch at this station and calculate whether the change in the total amount of energy storage that can be dispatched at this station is less than the set dispatchable energy storage. When it is not greater than the set dispatchable energy storage, the slave station will be controlled to continue to execute other tasks within this slave station. If the master station fails to receive the slave station's online information for three consecutive times, it will set the slave station to offline state and will not send any request to upload slave station information and scheduling commands to the slave station; S3. When the master station is powered on, it is also necessary to report the online information of the station to the dispatching center for confirmation by the dispatching center. Before receiving the dispatching center's notification that the station has been put into online status, the master station continues to report online information regularly. When receiving the dispatching center's request to upload the available dispatchable power instruction, and the total amount of dispatchable energy storage collected by the master station is greater than the set dispatchable energy storage, the master station reports to the dispatching center the total amount of dispatchable power of the slave stations in the master station area. After completing the total power report, if there are no other instructions, each master station will process other tasks of its own station and confirm whether it has arrived at the time to report the online time of the station to the dispatching center. When it is confirmed that it has arrived, the master station's online information will be reported to the dispatching center. At the same time, if it has not arrived at the time to upload the online time of the station to the platform, it will confirm whether it has received the dispatching center's request to upload the available dispatchable power instruction. S4. When the master station does not receive the demand dispatch instruction, it continues to process other tasks of the master station. When it receives the demand dispatch instruction, the master station calculates and analyzes the optimal slave station combination that meets the response dispatch requirements through the built-in most economical and reasonable algorithm, and then issues a start dispatch instruction to the analyzed slave station combination. When the slave station receives the dispatch instruction, the slave station in the combination controls the output according to the received slave station dispatch instruction to enter the dispatch response state. The master station confirms whether it has received responses from all slave stations in the combination. When the master station receives responses from all slave stations in the combination, it reports the demand situation that the master station has responded to to the dispatch center. When the master station does not receive feedback from a slave station in the response combination within the specified time limit, the master station will confirm whether it is caused by a waiting timeout. If the waiting timeout is confirmed, the master station will recalculate and analyze the information of the slave stations that have received feedback, select the best response slave station combination, and issue a start response instruction. After receiving feedback from all slave stations in the combination, the master station will report the demand situation that has been responded to to the dispatch center. After receiving feedback from all slave stations in the combination, the master station will report the demand situation that has been responded to to the dispatch center. Then, the master station and the slave station will complete their tasks within this station, and the start demand scheduling task will be completed. S5. The master station in the start demand scheduling state will send a stop demand scheduling instruction to each slave station in the response list after receiving the stop demand scheduling instruction from the dispatching center. When each slave station in the list that receives the stop demand scheduling instruction switches the demand working mode to the normal working mode and completes the switch, the slave station reports its working status to the master station and waits for the next demand scheduling instruction sent by the master station. After receiving the status and energy storage parameters reported by the slave station, the master station updates the stored working status and energy storage parameters of each slave station in real time, and then enters the waiting state for the dispatching center to issue a demand scheduling instruction.

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