Hybrid energy storage inverter ATS control device
By integrating the power grid and generator inputs into a hybrid energy storage inverter ATS control device, the problems of voltage detection failure and phase inconsistency during the switching process between the power grid and the generator are solved, achieving smooth power switching, ensuring the continuity and stability of load power supply, and improving the system's operational stability and energy utilization efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- AFORE NEW ENERGY TECH (SHANGHAI) CO LTD
- Filing Date
- 2025-02-13
- Publication Date
- 2026-05-15
AI Technical Summary
Existing photovoltaic energy storage ATS devices suffer from voltage detection failures, phase inconsistencies, and load power outages during grid-generator switching processes, leading to system downtime or damage and affecting the continuity and stability of power supply.
It adopts a hybrid energy storage inverter ATS control device, which integrates grid input, generator input, inverter 485 communication input and intelligent load interface. It monitors voltage status and phase through automatic transfer switch controller to achieve smooth switching. It is equipped with anti-reverse flow device to prevent energy backflow and has dual power supply mode to ensure voltage and phase consistency.
It achieves a smooth power switching process, avoids instantaneous high current surges, improves system operational stability, ensures the continuity and stability of load power supply, improves energy utilization efficiency, and enhances the anti-interference capability of the energy storage system.
Smart Images
Figure CN224249428U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power supply conversion technology for energy storage inverters, specifically to an improvement of a novel photovoltaic energy storage inverter ATS control device. Background Technology
[0002] With the rapid development of the photovoltaic energy storage technology industry, the application of energy storage systems is gradually increasing, and their application scenarios are becoming more and more complex and diversified. For example, they support grid-connected operation and off-grid operation, and can realize smooth and seamless switching between grid-connected and off-grid, generator access, intelligent load switching and other functions; integrated charging and discharging design to realize bidirectional energy flow between AC and DC systems, uninterrupted power supply to the load end, and maximize energy utilization. These requirements have put forward new requirements and challenges for current energy storage systems.
[0003] Current photovoltaic energy storage ATS (Automatic Transfer Switch) products primarily function as dual power inputs: one from the grid and the other from a generator or other secondary power source. When the grid is unavailable, they automatically switch to generator mode or the secondary power source to ensure uninterrupted power supply to the inverter load. However, this approach has certain limitations. During power outages, the switch to generator mode or the secondary power source lacks voltage sampling and phase tracking, leading to grid detection failures or phase inconsistencies. This can result in instantaneous high currents, causing system shutdown or failure, potentially resulting in complete closure or damage to the energy storage system. This disrupts normal system operation, causes power outages for customers, and leads to inconvenience and financial losses. To improve the reliability of energy storage systems and enhance the stability of customer loads, a new type of photovoltaic energy storage ATS device is needed. This device can quickly switch to a generator or other backup power source to ensure the continuity and stability of power supply to the load. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings and deficiencies of existing technologies by providing a hybrid energy storage inverter ATS control device. This device solves the problems of voltage detection failure, phase inconsistency, and load power failure during the switching process between the grid and the generator in existing energy storage systems. By integrating grid input, generator input, inverter 485 communication input, and intelligent load interface, it optimizes power supply reliability and system stability.
[0005] To achieve the above objectives, the present invention adopts the following technical solution: The hybrid energy storage inverter ATS control device includes: a grid input terminal 1, a generator input terminal 2, an inverter 485 communication interface 3, a smart load output interface 4, an inverter AC interface 5, a detection unit power supply terminal 6, and an automatic transfer switch controller 7. The grid input terminal 1 and the generator input terminal 2 are respectively connected to the automatic transfer switch controller 7 and their voltage status is monitored. The inverter 485 communication interface 3 and the smart load output interface 4 are both connected to the automatic transfer switch controller 7. The detection unit power supply terminal 6 is connected to the power supply of the automatic transfer switch controller 7. The inverter AC interface 5 is connected to the inverter connection terminal of the automatic transfer switch controller 7.
[0006] The control method of the hybrid energy storage inverter ATS control device is as follows: When the grid input terminal 1 detects that the grid is normal, the automatic transfer switch controller 7 outputs grid power to supply the energy storage inverter. When the grid fails or is damaged, the automatic transfer switch controller 7 supplies power to the smart load in off-grid mode through the smart load output interface 4. At the same time, the automatic transfer switch controller 7 detects the battery's SOC information and sends it to the automatic transfer switch controller 7. When the battery SOC value is lower than the set value, the automatic transfer switch controller 7 sends a generator start signal to start the generator. When the automatic transfer switch controller 7 detects that the voltage and phase of the generator's second power supply are normal, the automatic transfer switch controller 7 automatically switches to the generator's second power supply to supply the smart load.
[0007] The hybrid energy storage inverter ATS control device obtains the battery status information of the energy storage inverter through the inverter 485 communication interface 3, and controls the generator to start or the smart load to start and stop according to the battery status information value.
[0008] The hybrid energy storage inverter ATS control device has a detection unit power supply terminal 6 connected to a DC 5V power supply circuit, which is used to maintain the working state of the automatic transfer switch controller 7 when there is no power supply from the grid and the generator.
[0009] The hybrid energy storage inverter ATS control device has dual power supply modes, namely grid power supply mode and generator power supply mode, and ensures voltage and phase consistency when switching.
[0010] The hybrid energy storage inverter ATS control device is equipped with anti-reverse flow devices on both sides of the generator input terminal to prevent energy backflow from damaging the system.
[0011] The working principle of this invention is as follows: The grid input terminal is used to detect the grid voltage and supply power to the inverter; the generator input terminal serves as a backup power source, providing stable power supply during grid outages. The inverter's 485 communication interface can monitor the battery state of charge (SOC) in real time. When the grid is normal: power is supplied to the energy storage inverter and the load through the grid. When a grid fault occurs: the battery SOC is detected; when it is higher than a set value, the inverter switches to off-grid mode; when the SOC is lower than a set value, the generator is started as a power source; after confirming that the generator voltage and phase are normal, the system automatically switches to generator power supply while simultaneously charging the battery; the intelligent load output can automatically adjust the load power supply strategy according to the battery SOC.
[0012] The advantages of this utility model after adopting the above technical solution are as follows: the power switching process is smooth, avoiding instantaneous large current surges and solving the power supply surge problem that may occur in existing systems; real-time monitoring is achieved through the RS485 communication interface, improving the stability of system operation; this utility model realizes intelligent load management, improving energy utilization efficiency; it avoids long-term power outages in the energy storage system, improves energy utilization efficiency and protects equipment lifespan, enhances the anti-interference ability and adaptability of the energy storage system, and meets the needs of complex application scenarios. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 This is a schematic block diagram of the structure of the hybrid energy storage inverter ATS control device in this utility model;
[0015] Figure 2 This is a schematic diagram illustrating the working principle of the hybrid energy storage inverter ATS control device in this utility model.
[0016] Explanation of reference numerals in the attached diagram: 1. Grid input terminal; 2. Generator input terminal; 3. Inverter 485 communication interface; 4. Smart load output interface; 5. Inverter AC interface; 6. Power supply terminal of detection unit; 7. Automatic transfer switch controller. Detailed Implementation
[0017] See Figure 1-2As shown, the hybrid energy storage inverter ATS control device in this embodiment includes: a grid input terminal 1, a generator input terminal 2, an inverter 485 communication interface 3, a smart load output interface 4, an inverter AC interface 5, a detection unit power supply terminal 6, and an automatic transfer switch controller 7. The grid input terminal 1 and the generator input terminal 2 are respectively connected to the automatic transfer switch controller 7 and their voltage status is monitored. The inverter 485 communication interface 3 and the smart load output interface 4 are both connected to the automatic transfer switch controller 7. The detection unit power supply terminal 6 is connected to the power supply of the automatic transfer switch controller 7. The inverter AC interface 5 is connected to the inverter connection terminal of the automatic transfer switch controller 7.
[0018] The control method of the hybrid energy storage inverter ATS control device is as follows: When the grid input terminal 1 detects that the grid is normal, the automatic transfer switch controller 7 outputs grid power to supply the energy storage inverter. When the grid fails or is damaged, the automatic transfer switch controller 7 supplies power to the smart load in off-grid mode through the smart load output interface 4. At the same time, the automatic transfer switch controller 7 detects the battery's SOC information and sends it to the automatic transfer switch controller 7. When the battery SOC value is lower than the set value, the automatic transfer switch controller 7 sends a generator start signal to start the generator. When the automatic transfer switch controller 7 detects that the voltage and phase of the generator's second power supply are normal, the automatic transfer switch controller 7 automatically switches to the generator's second power supply to supply the smart load.
[0019] In this embodiment:
[0020] Grid Input: Connected to the municipal power grid, with a supply voltage range of 220V~240V and a frequency of 50Hz. Generator Input: A 3kW diesel generator is selected, equipped with an independent voltage sampling module and a phase tracking module. Energy Storage Inverter: A 10kW photovoltaic energy storage inverter is selected, supporting an RS485 communication interface, with a battery rated voltage of 48V. Smart Loads: Includes office equipment (computers, printers) and lighting systems, with a total power of 2kW. ATS Control Device: Has an independent 5V power supply circuit and supports automatic switching between multiple modes (grid-connected and off-grid).
[0021] Workflow: When the grid supply is normal, the grid directly supplies power to the load through the ATS device, simultaneously charging the energy storage battery. In case of grid failure: If the battery SOC is above 50%, the energy storage inverter switches to off-grid mode to supply power to the smart load. If the battery SOC is below 50%, the ATS starts the generator and switches power supply after detecting that the generator voltage is normal. Key components selected: Grid detection module: DEIF brand voltage sampler; Generator module: YAMAHA EF3000iSE diesel generator; Energy storage battery: Lithium iron phosphate battery with a capacity of 10kWh.
[0022] The hybrid energy storage inverter ATS control device obtains the battery status information of the energy storage inverter through the inverter 485 communication interface 3, and controls the generator to start or the smart load to start and stop according to the battery status information value.
[0023] The hybrid energy storage inverter ATS control device has a detection unit power supply terminal 6 connected to a DC 5V power supply circuit, which is used to maintain the working state of the automatic transfer switch controller 7 when there is no power supply from the grid and the generator.
[0024] The hybrid energy storage inverter ATS control device has dual power supply modes, namely grid power supply mode and generator power supply mode, and ensures voltage and phase consistency when switching.
[0025] The hybrid energy storage inverter ATS control device is equipped with anti-reverse flow devices on both sides of the generator input terminal to prevent energy backflow from damaging the system.
[0026] The working principle of this invention is as follows: The grid input terminal is used to detect the grid voltage and supply power to the inverter; the generator input terminal serves as a backup power source, providing stable power supply during grid outages. The inverter's 485 communication interface can monitor the battery state of charge (SOC) in real time. When the grid is normal: power is supplied to the energy storage inverter and the load through the grid. When a grid fault occurs: the battery SOC is detected; when it is higher than a set value, the inverter switches to off-grid mode; when the SOC is lower than a set value, the generator is started as a power source; after confirming that the generator voltage and phase are normal, the system automatically switches to generator power supply while simultaneously charging the battery; the intelligent load output can automatically adjust the load power supply strategy according to the battery SOC.
[0027] The advantages of this utility model after adopting the above technical solution are as follows: the power switching process is smooth, avoiding instantaneous large current surges and solving the power supply surge problem that may occur in existing systems; real-time monitoring is achieved through the RS485 communication interface, improving the stability of system operation; this utility model realizes intelligent load management, improving energy utilization efficiency; it avoids long-term power outages in the energy storage system, improves energy utilization efficiency and protects equipment lifespan, enhances the anti-interference ability and adaptability of the energy storage system, and meets the needs of complex application scenarios.
[0028] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.
Claims
1. A hybrid energy storage inverter ATS control device, characterized in that: The hybrid energy storage inverter ATS control device includes: a grid input terminal (1), a generator input terminal (2), an inverter 485 communication interface (3), a smart load output interface (4), an inverter AC interface (5), a detection unit power supply terminal (6), and an automatic transfer switch controller (7). The grid input terminal (1) and the generator input terminal (2) are respectively connected to the automatic transfer switch controller (7) and their voltage status is monitored. The inverter 485 communication interface (3) and the smart load output interface (4) are both connected to the automatic transfer switch controller (7). The detection unit power supply terminal (6) is connected to the power supply of the automatic transfer switch controller (7). The inverter AC interface (5) is connected to the inverter connection terminal of the automatic transfer switch controller (7).
2. The hybrid energy storage inverter ATS control device according to claim 1, characterized in that: The hybrid energy storage inverter ATS control device obtains the battery status information of the energy storage inverter through the inverter 485 communication interface (3), and controls the generator to start or the smart load to start and stop according to the battery status information value.
3. The hybrid energy storage inverter ATS control device according to claim 1, characterized in that: The hybrid energy storage inverter ATS control device has a detection unit power supply terminal (6) connected to a DC 5V power supply circuit, which is used to maintain the working state of the automatic transfer switch controller (7) when there is no power supply from the grid and the generator.
4. The hybrid energy storage inverter ATS control device according to claim 1, characterized in that: The hybrid energy storage inverter ATS control device has dual power supply modes, namely grid power supply mode and generator power supply mode, and ensures voltage and phase consistency when switching.
5. The hybrid energy storage inverter ATS control device according to claim 1, characterized in that: The hybrid energy storage inverter ATS control device is equipped with an anti-reverse flow device on the generator input terminal (2) side to avoid energy backflow causing damage to the system.