A dual-power automatic switching power supply device and a fluid energy storage system
By employing dual power inputs, ATS intelligent switching for rapid switching, and load grading management, the problem of insufficient UPS capacity in flow storage systems is solved, enabling rapid power switching and stable power supply, meeting power interruption sensitivity requirements, and reducing system costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 常州星辰新能源有限公司
- Filing Date
- 2025-06-18
- Publication Date
- 2026-05-26
AI Technical Summary
The existing UPS capacity of the fluid energy storage system is insufficient to meet the expansion requirements of secondary loads during long-term operation, and the UPS switching time is long, which cannot meet the requirement of power interruption sensitivity of less than 5ms.
By employing dual power input, ATS intelligent switch for rapid switching, and load classification management, the system achieves rapid power switching and intelligent classified power supply through a dual power automatic switching device, thereby enhancing the system's power supply stability and reliability.
It achieves fast and seamless power switching with a switching time of ≤3ms, meeting the requirement of power interruption sensitivity of <5ms for flow liquid energy storage systems, reducing system costs, and improving power supply stability and reliability.
Smart Images
Figure CN224289380U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of liquid flow energy storage and power distribution systems, specifically to a dual-power automatic switching power supply device and a liquid flow energy storage system. Background Technology
[0002] With the development of new energy sources such as wind power and photovoltaic power, the amount of electricity connected to the grid is constantly increasing. During the grid connection process, both wind and solar power generation are subject to certain fluctuations, making it difficult to maintain the stability of power supply. Therefore, energy storage systems such as flow storage systems are required.
[0003] In existing technologies, the secondary power switching method of flow energy storage systems mainly achieves dual power switching by supplying power to a UPS (Uninterruptible Power Supply) through an integrated in-cabin auxiliary transformer. Due to the limited space in the distribution box, the existing UPS capacity is small, usually 1-10kVA, which cannot meet the expansion requirements of secondary loads (such as control systems and cooling devices) during long-term operation of flow energy storage systems. In addition, the efficiency of UPS is only 85% to 90% when running at full load, and the remaining energy is dissipated as heat, resulting in internal temperature rise and UPS switching time of 2-10ms, which cannot meet the requirement of flow energy storage systems to have a power interruption sensitivity of less than 5ms.
[0004] Therefore, it is necessary to provide a new dual-power automatic switching power supply device. Utility Model Content
[0005] In view of this, the present invention provides a dual-power automatic switching power supply device, which adopts dual power input, ATS intelligent switch for fast switching and intelligent hierarchical management of equipment to achieve rapid power switching, enhance the power supply stability and reliability of the flow energy storage system, and reduce system cost.
[0006] The technical solution adopted by this utility model to solve its technical problem is: a dual power supply automatic switching power supply device is provided, including: a dual power input module, an ATS intelligent switch module and a load classification power distribution module. The input terminal of the ATS intelligent switch module is electrically connected to the dual power input module, and the output terminal of the ATS intelligent switch module is electrically connected to the load classification power distribution module. The ATS intelligent switch module is used to monitor power data in real time and automatically switch the power supply.
[0007] The dual power supply module includes a first power supply and a second power supply. The first power supply is used to step down the high voltage output from the AC busbar of the booster station to a set voltage via a step-down transformer. The second power supply includes an integrated energy storage converter booster compartment. The high voltage of the integrated energy storage converter booster compartment is stepped down to the set voltage via an internal auxiliary transformer TR.
[0008] The load distribution module includes a primary load circuit, a secondary load circuit, and a tertiary load circuit.
[0009] Furthermore, the first power source is used to step down the 35kV voltage output from the AC busbar of the booster station to 0.4kV via a step-down transformer, and the 10kV voltage of the energy storage converter booster compartment is stepped down to 0.4kV via an internal auxiliary transformer TR.
[0010] Furthermore, the output terminal of the first power supply is electrically connected to the first input terminal of the ATS intelligent switch module, and the output terminal of the second power supply is electrically connected to the second input terminal of the ATS intelligent switch module.
[0011] Furthermore, a first air switch QF1 is also connected between the first power supply and the ATS intelligent switch module.
[0012] Furthermore, the integrated energy storage, converter, and booster compartment is also equipped with three sets of voltage transformers TVA, TVB, and TVC, three sets of current transformers TAa1, TAb1, and TAc1, and a disconnecting switch QS1.
[0013] Furthermore, the ATS intelligent switch module uses the Schneider ATS48 model, with a rated current of 630A and a switching time of ≤3ms. The ATS intelligent switch module adopts a dual ATS parallel structure, so that when one ATS fails, the other ATS can automatically take over the switching function.
[0014] Furthermore, the ATS intelligent switch module is communicatively connected to the SCADA platform.
[0015] Furthermore, the input terminal of the primary load circuit is electrically connected to the output terminal of the ATS intelligent switch module, and the output terminal of the primary load circuit is electrically connected to the primary load device; the input terminal of the secondary load circuit is electrically connected to the output terminal of the ATS intelligent switch module, and the output terminal of the secondary load circuit is electrically connected to the secondary load device; the input terminal of the tertiary load circuit is electrically connected to the output terminal of the ATS intelligent switch module, and the output terminal of the tertiary load circuit is electrically connected to the tertiary load device.
[0016] Furthermore, the primary load circuit is connected to primary load power switches QF5, QF6 and QF7; the secondary load circuit is connected to secondary load power switch QF3; the tertiary load circuit is connected to tertiary load power switch QF4; and / or, the primary load circuit is equipped with a second air switch QF2 and a UPS.
[0017] To achieve the above objectives, the technical solution adopted by this utility model is to provide a liquid flow energy storage system, including a dual-power automatic switching power supply device provided by any of the above solutions.
[0018] The beneficial effects of this utility model are as follows: The dual-power automatic switching power supply device and the liquid flow energy storage system of this utility model include a dual-power input module, an ATS intelligent switch module, and a load-level distribution module. The input terminal of the ATS intelligent switch module is electrically connected to the dual-power input module, and the output terminal of the ATS intelligent switch module is electrically connected to the load-level distribution module. The ATS intelligent switch module is used to monitor power data in real time and automatically switch the power supply. The dual-power module includes a first power supply and a second power supply. The first power supply is used to step down the high voltage output from the AC bus of the booster station to a set voltage via a step-down transformer. The second power supply includes an integrated energy storage converter booster compartment. The high voltage of the integrated energy storage converter booster compartment is stepped down to the set voltage via an internal auxiliary transformer TR. The load-level distribution module includes a primary load circuit, a secondary load circuit, and a tertiary load circuit. This utility model's dual-power automatic switching power supply device adopts dual power inputs to avoid single power failure; it uses an ATS intelligent switch for fast switching and prevents accidental triggering; through intelligent hierarchical management of equipment, it ensures priority power supply to core equipment, optimizes resource allocation, enhances the power supply stability and reliability of the flow energy storage system, and reduces system costs. Attached Figure Description
[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0020] Figure 1 This is a schematic diagram of the dual-power automatic switching power supply device according to Embodiment 1 of this utility model;
[0021] Figure 2 This is a schematic diagram of the dual-power automatic switching power supply device according to Embodiment 2 of this utility model.
[0022] The component names and their numbers in the diagram are as follows:
[0023] Dual power supply automatic switching device 100;
[0024] Dual power input module 1, first power supply 11, second power supply 12;
[0025] ATS Smart Switch Module 2;
[0026] Load-level distribution module 3, primary load circuit 31, secondary load circuit 32, tertiary load circuit 33;
[0027] SCADA Platform 4;
[0028] Level 1 load equipment 51, Level 2 load equipment 52, Level 3 load equipment 53. Detailed Implementation
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the utility model will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, illustrating only the basic structure of the utility model, and therefore only shows the components relevant to the utility model. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0030] The following are explanations of terms that may appear in the following embodiments:
[0031] ATS (Automatic Transfer Switch): An intelligent switch that automatically switches between different modes of operation.
[0032] SCADA platform: (Supervisory Control and Data Acquisition Platform) is a data acquisition and monitoring control platform.
[0033] UPS (Uninterruptible Power Supply) is a power supply that provides uninterrupted power.
[0034] Example 1
[0035] like Figure 1 As shown, this utility model provides a flow battery energy storage system (not shown in the figure), which includes a dual-power automatic switching device. The dual-power automatic switching device 100 includes a dual-power input module 1, an ATS intelligent switch module 2, and a load-level distribution module 3. The input terminal of the ATS intelligent switch module 2 is electrically connected to the dual-power input module 1, and the output terminal of the ATS intelligent switch module 2 is electrically connected to the load-level distribution module 3. The dual-power input module 1 provides two independent power sources to prevent system failure due to a single power source and enhance system stability; the ATS intelligent switch module 2 monitors power data in real time and automatically switches between power sources; the load-level distribution module 3 implements tiered power supply to ensure power supply stability.
[0036] In some embodiments, the dual power supply module 1 includes a first power supply 11 and a second power supply 12. The first power supply 11 is used to step down the high voltage output from the AC busbar of the substation to a set voltage via a step-down transformer. The second power supply 12 includes an integrated energy storage converter and step-up module, whose high voltage is stepped down to the set voltage via an internal auxiliary transformer TR. The output terminal of the first power supply 11 is electrically connected to the first input terminal of the ATS intelligent switch module 2. The output terminal of the second power supply 12 is electrically connected to the second input terminal of the ATS intelligent switch module 2.
[0037] As an example, the first power supply 11 is used to step down the 35kV voltage output from the AC busbar of the booster station to 0.4kV via a step-down transformer, and the 10kV voltage of the energy storage converter booster compartment is stepped down to 0.4kV via an internal auxiliary transformer TR.
[0038] Furthermore, the internal capacity of the energy storage, converter, and booster integrated cabin is designed to be 120% of the total load power, with redundancy reserved to meet load demands and avoid capacity shortage problems.
[0039] In some embodiments, a first air switch QF1 is also connected between the first power supply 11 and the ATS smart switch module 2.
[0040] In some embodiments, the integrated energy storage converter booster compartment is also equipped with three sets of voltage transformers TVA, TVB and TVC, three sets of current transformers TAa1, TAb1 and TAc1, and a disconnecting switch QS1, which are used to jointly ensure power supply safety.
[0041] In some embodiments, the ATS intelligent switch module 2 uses a Schneider ATS48 model with a rated current of 630A and a switching time of ≤3ms. The ATS intelligent switch module 2 employs a dual-ATS parallel structure; when one ATS fails, the other ATS can automatically take over the switching function, preventing single-point failure of the ATS intelligent switch module 2. The ATS intelligent switch module 2 monitors the output parameters of the first power supply 11 and the second power supply 12 in real time using a built-in voltage sensor and frequency meter. The rated voltage output by the first power supply 11 and the second power supply 12 is set to U. n The voltage threshold is set to ±10%U n That is, the allowable voltage fluctuation range is 90%U. n ~110%U n The rated frequency output by the first power supply 11 and the second power supply 12 is f, and the frequency threshold is set to ±2Hz, that is, the allowable frequency fluctuation range is f-2Hz to f+2Hz.
[0042] As an example, since the first power supply 11 and the second power supply 12 output 0.4kV, which is 400V, the allowable voltage fluctuation range is 360V to 440V.
[0043] Furthermore, if the output parameters of the first power supply 11 remain abnormal for more than 500ms (abnormal output parameters refer to voltage or frequency exceeding the allowable fluctuation range), the ATS intelligent switch module 2 will switch its corresponding switch from closed to open on the first power supply 11 within 3ms, and simultaneously switch its corresponding switch from open to closed on the second power supply 12. This ensures the continuity of power supply to the energy storage system. When the output parameters of the first power supply 11 return to normal (i.e., the voltage and frequency are within the allowable fluctuation range), the ATS intelligent switch module 2 will automatically switch its corresponding switch from open to closed on the first power supply 11 after 10 seconds, and simultaneously switch its corresponding switch from closed to open on the second power supply 12. By setting the output parameters to remain abnormal for more than 500ms, transient interference in the power output parameters prevents the ATS intelligent switch module 2 from being falsely triggered. Setting the ATS intelligent switch module 2 to switch back after 10 seconds avoids frequent power switching that could impact the equipment.
[0044] In some embodiments, the ATS smart switch module 2 is also connected to the SCADA platform 4. When the ATS smart switch module 2 performs a switching action, it automatically records the fault log and pushes alarm information to the SCADA platform 4.
[0045] In some embodiments, the load-level distribution module 3 includes a primary load circuit 31, a secondary load circuit 32, and a tertiary load circuit 33. The input terminal of the primary load circuit 31 is electrically connected to the output terminal of the ATS intelligent switch module 2, and the output terminal of the primary load circuit 31 is electrically connected to the primary load device 51. The input terminal of the secondary load circuit 32 is electrically connected to the output terminal of the ATS intelligent switch module 2, and the output terminal of the secondary load circuit 32 is electrically connected to the secondary load device 52. The input terminal of the tertiary load circuit 33 is electrically connected to the output terminal of the ATS intelligent switch module 2, and the output terminal of the tertiary load circuit 33 is electrically connected to the tertiary load device 53. The primary load device 51 consists of equipment with extremely high power supply reliability requirements, such as the energy storage control system and safety protection devices. The primary load device 51 is the core part of the energy storage system, has the highest power supply priority, and requires zero-interruption power supply. The secondary load device 52 consists of equipment that allows for short interruptions of ≤5ms, such as cooling circulation pumps and environmental monitoring instruments. The tertiary load device 53 consists of non-critical equipment such as fans and lighting equipment.
[0046] In some embodiments, a primary load power switch QF5, QF6 and QF7 are also connected to the primary load circuit 31. Each primary load power switch QF5, QF6 and QF7 corresponds to a primary load device 51 connected in series. Multiple switches QF5, QF6 and QF7 are configured to achieve branch circuit protection. A secondary load power switch QF3 is also connected to the secondary load circuit 32. A tertiary load power switch QF4 is also connected to the tertiary load circuit 33.
[0047] Furthermore, when the capacity of the second power supply 12 is insufficient, the ATS intelligent switch module 2 prioritizes disconnecting the tertiary load circuit 33 to ensure a stable power supply to the primary load device 51 on the primary load circuit 31 and the secondary load device 52 on the secondary load circuit 32. When the capacity of the second power supply 12 is insufficient, the ATS intelligent switch module 2 automatically disconnects the secondary load circuit 32, prioritizing the power supply to the primary load device 51 on the primary load circuit 31.
[0048] The working process of the dual-power automatic switching power supply device 100 of this utility model is as follows: The first power supply 11 in the dual power input module 1 is used to step down the 35kV power output from the AC bus of the booster station to 0.4kV via a step-down transformer, serving as the main power supply. The second power supply 12 is used to step down the 10kV high voltage of the energy storage converter booster compartment to 0.4kV via an internal auxiliary transformer TR, serving as the backup power supply. The ATS intelligent switch module 2 adopts a dual ATS parallel structure. The ATS intelligent switch module 2 monitors the parameters of the first power supply 11 and the second power supply 12 in real time through built-in voltage sensors and frequency meters. When the parameters of the first power supply 11 are abnormal for more than 500ms, it switches to the backup power supply, i.e., the second power supply 12, within 3ms; when the first power supply 11 returns to normal, it automatically switches back after 10 seconds to avoid frequent switching. The load devices are divided into three levels. The first-level load device 51 has the highest priority and requires zero-interruption power supply. It is protected by multiple switches. The second-level load device 52 is allowed to be interrupted for ≤5ms. The third-level load device 53 is a non-critical device. When the capacity of the second power supply 12 is insufficient, the ATS intelligent switch module 2 will first cut off the third-level load circuit 33. If it is still insufficient, it will cut off the second-level load circuit 32 to ensure a stable power supply to the first-level load device 51 on the first-level load circuit 31.
[0049] The dual-power automatic switching power supply device 100 of this utility model includes a dual-power input module 1, an ATS intelligent switch module 2, and a load-level distribution module 3. The input terminal of the ATS intelligent switch module 2 is electrically connected to the dual-power input module 1, and the output terminal of the ATS intelligent switch module 2 is electrically connected to the load-level distribution module 3. The dual-power module 1 includes a first power supply 11 and a second power supply 12. The first power supply 11 is used to step down the high voltage output from the AC bus of the booster station to a set voltage via a step-down transformer. The second power supply 12 is used to step down the high voltage of the energy storage converter booster compartment to the set voltage via an internal auxiliary transformer TR. The ATS intelligent switch module 2 is a Schneider ATS48 model, used to monitor power parameters in real time and perform automatic power switching. The input terminal of the load-level distribution module 3 is electrically connected to the output terminal of the ATS intelligent switch module 2, and is used to connect load devices according to power supply priority. The dual-power automatic switching device 100 of this utility model achieves rapid and seamless switching between dual power supplies with a switching time of ≤3ms. This meets the national standard requirement of <5ms sensitivity to power interruption for flow energy storage control systems. It also boasts a high switching success rate, reducing the risk of system runaway and ensuring stable operation of the energy storage system. Furthermore, it eliminates the need for existing UPS equipment, reducing investment costs. Additionally, it employs a load-level distribution module 3 for three-level load management, with the highest priority given to primary loads, allowing for zero interruptions. When the backup power capacity is insufficient, it automatically disconnects non-critical loads, ensuring stable power supply to core loads and improving the overall safety and stability of the energy storage system.
[0050] Example 2
[0051] like Figure 2 As shown, the dual-power automatic switching power supply device 100 in this embodiment still includes a dual-power input module 1, an ATS intelligent switch module 2, and a load-level distribution module 3 in its overall structural framework. The main difference from Embodiment 1 lies in the connection structure of the load-level distribution module 3.
[0052] In some embodiments, the load-level distribution module 3 includes a primary load circuit 31, a secondary load circuit 32, and a tertiary load circuit 33. The input terminal of the primary load circuit 31 is electrically connected to the output terminal of the ATS intelligent switch module 2, and the output terminal of the primary load circuit 31 is electrically connected to the primary load device 51. The input terminal of the secondary load circuit 32 is electrically connected to the output terminal of the ATS intelligent switch module 2, and the output terminal of the secondary load circuit 32 is electrically connected to the secondary load device 52. The input terminal of the tertiary load circuit 33 is electrically connected to the output terminal of the ATS intelligent switch module 2, and the output terminal of the tertiary load circuit 33 is electrically connected to the tertiary load device 53. The primary load device 51 consists of equipment with extremely high power supply reliability requirements, such as the energy storage control system and safety protection devices. The primary load device 51 is the core part of the energy storage system, has the highest power supply priority, and requires zero-interruption power supply. The secondary load device 52 consists of equipment that allows for short interruptions of ≤5ms, such as cooling circulation pumps and environmental monitoring instruments. The tertiary load device 53 consists of non-critical equipment such as fans and lighting equipment.
[0053] In some embodiments, a primary load power switch QF5, QF6 and QF7 are also connected to the primary load circuit 31. Each primary load power switch QF5, QF6 and QF7 corresponds to a primary load device 51 connected in series. Multiple switches QF5, QF6 and QF7 are configured to achieve branch circuit protection. A secondary load power switch QF3 is also connected to the secondary load circuit 32. A tertiary load power switch QF4 is also connected to the tertiary load circuit 33.
[0054] In some embodiments, a second air switch QF2 and a UPS (Uninterruptible Power Supply) are also provided on the primary load circuit 31. The second air switch QF2 and the UPS are connected between the ATS intelligent switch module 2 and the primary load power switches QF5, QF6, and QF7. By setting the UPS as a backup power source, power can be continuously supplied when both the primary power supply 11 and the secondary power supply 12 are interrupted. Furthermore, in the load distribution module 3, the primary load device 51 has the highest priority. The UPS configuration ensures that when the backup power capacity is insufficient, in addition to automatically disconnecting the secondary and tertiary load devices, the primary load device 51 can still maintain power supply through the UPS, further enhancing the stability of the system under extreme operating conditions.
[0055] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0056] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the scope of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.
Claims
1. A dual automatic changeover power supply device characterized by comprising: include: Dual power input module, ATS intelligent switch module, and load-level power distribution module; The input terminal of the ATS intelligent switch module is electrically connected to the dual power input module, and the output terminal of the ATS intelligent switch module is electrically connected to the load-level power distribution module. The ATS intelligent switch module is used to switch power supplies. The dual power supply module includes a first power supply and a second power supply. The first power supply is used to step down the high voltage output from the AC busbar of the booster station to a set voltage via a step-down transformer. The second power supply includes an integrated energy storage converter booster compartment. The high voltage of the integrated energy storage converter booster compartment is stepped down to the set voltage via an internal auxiliary transformer TR. The load distribution module includes a primary load circuit, a secondary load circuit, and a tertiary load circuit.
2. The dual automatic transfer switching power supply device according to claim 1, characterized by, The first power supply is used to step down the 35kV voltage output from the AC busbar of the booster station to 0.4kV via a step-down transformer, and the 10kV voltage of the energy storage converter booster compartment is stepped down to 0.4kV via an internal auxiliary transformer TR.
3. The dual-power automatic switching power supply device according to claim 1, characterized in that, The output terminal of the first power supply is electrically connected to the first input terminal of the ATS intelligent switch module, and the output terminal of the second power supply is electrically connected to the second input terminal of the ATS intelligent switch module.
4. The dual-power automatic switching power supply device according to claim 1, characterized in that, A first air switch QF1 is also connected between the first power supply and the ATS intelligent switch module.
5. The dual-power automatic switching power supply device according to claim 1, characterized in that, The integrated energy storage, converter, and booster compartment is also equipped with three sets of voltage transformers TVA, TVB, and TVC, three sets of current transformers TAa1, TAb1, and TAc1, and a disconnecting switch QS1.
6. The dual-power automatic switching power supply device according to claim 1, characterized in that, The ATS intelligent switch module is a Schneider ATS48 model with a rated current of 630A and a switching time of ≤3ms. The ATS intelligent switch module adopts a dual ATS parallel structure.
7. The dual-power automatic switching power supply device according to claim 1, characterized in that, The ATS intelligent switch module is connected to the SCADA platform for communication.
8. The dual-power automatic switching power supply device according to claim 1, characterized in that, The input terminal of the primary load circuit is electrically connected to the output terminal of the ATS intelligent switch module, and the output terminal of the primary load circuit is electrically connected to the primary load device; the input terminal of the secondary load circuit is electrically connected to the output terminal of the ATS intelligent switch module, and the output terminal of the secondary load circuit is electrically connected to the secondary load device; the input terminal of the tertiary load circuit is electrically connected to the output terminal of the ATS intelligent switch module, and the output terminal of the tertiary load circuit is electrically connected to the tertiary load device.
9. The dual-power automatic switching power supply device according to claim 8, characterized in that, The primary load circuit is connected to primary load power switches QF5, QF6 and QF7; the secondary load circuit is connected to secondary load power switch QF3; the tertiary load circuit is connected to tertiary load power switch QF4; and / or, the primary load circuit is equipped with a second air switch QF2 and a UPS.
10. A fluid energy storage system, characterized in that, The fluid energy storage system includes the dual-power automatic switching power supply device as described in any one of claims 1 to 9.