Energy storage control busbar and safe linkage control method thereof

Abstract

The application discloses an energy storage control busbar cabinet and a safe linkage control method thereof, and relates to the technical field of energy storage system control. The busbar cabinet comprises a cabinet body, a direct current busbar module, an alternating current auxiliary power supply module and a control module. The control module comprises a PLC control unit, a safety sensing module and a control execution module. The safety sensing module is used for collecting operation parameters such as cabinet door state, direct current busbar current, busbar temperature and isolating switch state in real time. The PLC control unit determines the risk level according to the parameters and outputs a graded linkage control instruction to the control execution module, so as to realize protection actions such as instant tripping, delay control or early warning processing. The application improves the safety and reliability of the energy storage control busbar cabinet in a high-voltage operation environment through a multi-parameter comprehensive determination and a graded linkage control mechanism.

Description

Technical Field

[0001] This invention relates to the technical field of energy storage control combiner cabinets, and in particular to an energy storage control combiner cabinet and its safety linkage control method. Background Technology

[0002] With the increasing proportion of new energy power generation, energy storage systems have been widely applied in grid-side, generation-side, and user-side scenarios. As a key device for centralized power collection and distribution within an energy storage system, the energy storage control combiner cabinet undertakes important functions such as centralized access, isolation protection, and external output of DC power from multiple battery clusters. It also handles auxiliary power supply, status monitoring, and communication data aggregation. Under high-voltage and high-current operating conditions, the operational safety of the combiner cabinet directly affects the stability of the entire energy storage system and the safety of personnel.

[0003] Existing energy storage control combiner cabinets typically feature an integrated structural design, primarily consisting of a copper busbar structure, DC disconnect switch, fuses, auxiliary power supply module, and PLC control unit. When the cabinet door is opened or an abnormal operating condition occurs, the system usually only detects the door status via a limit switch and triggers the DC disconnect switch to trip, achieving simple power outage protection. However, this type of protection is mostly rigid logic control triggered by a single signal, lacking comprehensive analysis and cross-verification of multiple parameters such as busbar current status, temperature changes, switch position feedback, and load operating status.

[0004] In actual operation, energy storage systems may operate under load. If power is directly cut off based solely on cabinet door opening signals, it can easily lead to malfunctions or system instability. Conversely, failure to promptly identify risks such as high-voltage loads, abnormal temperature rises, or abnormal current fluctuations may result in arcing, component overheating, or even equipment damage, posing significant safety hazards. Furthermore, existing control methods generally lack risk level classification mechanisms and tiered linkage control strategies, failing to implement differentiated protection measures based on different risk levels, and also lacking comprehensive safety incident recording and remote communication feedback mechanisms.

[0005] Therefore, how to introduce a multi-parameter sensing and comprehensive judgment mechanism on the basis of the existing energy storage control combiner cabinet structure, construct a risk classification and identification model, and realize hierarchical linkage control and dynamic safety protection to improve the safety and intelligence level of the energy storage system under complex operating conditions has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] In view of this, it is necessary to provide an energy storage control combiner cabinet and its safety linkage control method. This method at least solves the problem that existing energy storage control combiner cabinets rely solely on a single switch signal for simple power-off control when the cabinet door is open or under abnormal operating conditions. This lacks a multi-parameter comprehensive judgment and hierarchical linkage protection mechanism, and cannot intelligently identify and classify risks such as high-voltage load conditions, abnormal temperature rise, and abnormal current. As a result, the safety protection response is lagging, the probability of malfunction is high, and the operational safety is insufficient.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: In a first aspect, the present invention provides an energy storage control combiner cabinet, comprising: The cabinet contains a DC combiner module, an AC auxiliary power supply module, and a control module. The DC combiner module includes a DC busbar, an electric DC disconnect switch, and a fuse, and multiple battery clusters are combined through the DC busbar. The control module includes a PLC control unit and a safety sensing module and a control execution module connected thereto. The safety sensing module is used to collect the operating status parameters of the cabinet in real time. The operating status parameters include at least the door status detection unit signal, the DC busbar current acquisition unit signal, the DC busbar temperature acquisition unit signal, and the status feedback signal of the electric DC disconnect switch. The PLC control unit is used to determine the risk level based on the operating status parameters, and output the corresponding linkage control command to the control execution module based on the determination result; The control execution module is used to control the electric DC disconnect switch to perform graded protection actions according to the linkage control command.

[0008] In a further embodiment, the safety sensing module also includes an ambient temperature and humidity detection unit and an electric arc detection unit.

[0009] In a further embodiment, the PLC control unit is equipped with a risk level determination module, which is used to classify risks into at least level one risk, level two risk, and level three risk according to preset determination rules.

[0010] In a further embodiment, when the risk level is determined to be Level 1, the PLC control unit controls the electric DC disconnect switch to immediately trip and triggers an audible and visual alarm.

[0011] In a further embodiment, when the risk is determined to be level two, the PLC control unit first performs a delayed load reduction control. If the risk persists within a preset time, the PLC control unit then controls the electric DC disconnect switch to open.

[0012] In a further embodiment, the control module also includes an event recording unit, which stores and records the risk level determination result, trigger time, and execution action, and sends them to the outside world through the communication interface.

[0013] Secondly, the present invention provides a safety linkage control method for an energy storage control combiner cabinet, comprising the following steps: S1: Real-time acquisition of cabinet door status signal, DC busbar current signal, busbar temperature signal and disconnector switch status feedback signal; S2: Cross-verify the cabinet door status signal and the DC bus current signal to determine whether there is a high-voltage load-bearing door open state; S3: Perform time window analysis on the busbar temperature signal to determine if there is a continuous temperature rise anomaly; S4: Generate a risk level signal based on the above judgment results; S5: Send linkage control commands to the control execution module based on the risk level signal; S6: Performs immediate tripping, delayed control, or early warning processing; S7: Record risk event information and upload it via the communication interface; S8: When the operating status parameters recover to the safe threshold range within a continuous preset time, a reset operation is allowed.

[0014] In a further embodiment, step S2 involves cross-verifying the cabinet door status signal with the DC bus current signal to determine whether the cabinet is in a high-voltage load-bearing open state.

[0015] In a further embodiment, step S2 involves performing a time window analysis on the DC busbar temperature signal to determine whether there is a continuous temperature rise anomaly.

[0016] In a further proposed solution, after the protection action is performed, a risk clearance determination step is also included. If the operating status parameters recover to the safe threshold range within a continuous preset time, a reset operation is allowed.

[0017] Compared with the prior art, the present invention has the following advantages: This invention, by setting up a safety sensing module, collects multiple operating parameters in real time, such as cabinet door status, DC busbar current, busbar temperature, and disconnector switch status feedback. It also constructs a risk level determination mechanism within the PLC control unit to achieve comprehensive identification and classification of risky operating conditions such as high-voltage load door opening, abnormal temperature rise, and abnormal current. This avoids unnecessary shutdowns caused by false triggering of a single signal and reduces the occurrence of missed risk assessments, significantly improving the safety and reliability of the energy storage control combiner cabinet in complex operating environments.

[0018] Meanwhile, by establishing a hierarchical linkage control strategy, this invention implements differentiated protection measures such as immediate circuit breaker tripping, delayed load reduction, early warning monitoring, or recording and reporting according to different risk levels. Combined with event recording and communication output mechanisms, it forms a complete safety closed-loop control system, which not only improves the safety of personnel operation under high-voltage operating conditions, but also enhances the system's intelligent management capabilities and operation and maintenance traceability, which is conducive to improving the overall stability of the energy storage system.

[0019] To make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] in: Figure 1 This is a schematic diagram of the overall structure of the energy storage control combiner cabinet of the present invention; Figure 2 This is a schematic diagram of the internal functional partition structure of the energy storage control combiner cabinet of the present invention; Figure 3 This is a schematic diagram of the composition structure of the security sensing module of the present invention; Figure 4 This is a functional block diagram of the safety linkage control system of the present invention; Figure 5 This is a schematic diagram illustrating the risk level determination logic of the present invention; Figure 6 This is a flowchart of the safety linkage control method of the present invention.

[0021] Label Explanation: 1. Cabinet; 2. DC combiner module; 3. AC auxiliary power supply module; 4. Control module; 5. DC busbar; 6. Electric DC disconnect switch; 7. Fuse; 8. Insulator; 9. PLC control unit; 10. Safety sensing module; 11. Control execution module; 12. Communication interface module; 13. Door status detection unit; 14. DC busbar current acquisition unit; 15. DC busbar temperature acquisition unit; 16. Arc detection unit; 17. Ambient temperature and humidity detection unit; 18. Risk level determination module; 19. Event recording unit; 20. Audible and visual alarm unit; 21. Disconnect switch status feedback unit. Detailed Implementation

[0022] To make the technical problems, solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention.

[0023] like Figures 1 to 6As shown, the present invention provides an energy storage control combiner cabinet and its safety linkage control method. The energy storage control combiner cabinet includes a cabinet 1, and the cabinet 1 is equipped with a DC combiner module 2, an AC auxiliary power supply module 3 and a control module 4.

[0024] like Figure 1 and Figure 2 As shown, the DC combiner module 2 includes a DC busbar 5, an electric DC disconnect switch 6, and a fuse 7. Multiple battery clusters are connected to the DC busbar 5 via cables for centralized current collection. The DC busbar 5 is fixedly installed on the inner wall of the cabinet 1 by insulators 8, meeting the electrical clearance and creepage distance requirements under 1500Vdc operating conditions. The output terminal of the DC busbar 5 is connected to the electric DC disconnect switch 6 via the fuse 7 to realize the connection and disconnection of the DC circuit.

[0025] The AC auxiliary power supply module 3 includes an AC main switch, multiple distribution switches, and a switching power supply. The switching power supply is used to convert 220V AC power into 24V DC power to power the PLC control unit 9, the switch, and communication equipment.

[0026] The control module 4 includes a PLC control unit 9, a safety sensing module 10, and a control execution module 11. The safety sensing module 10 is electrically connected to the PLC control unit 9, and the control execution module 11 is electrically connected to the electric DC disconnect switch 6.

[0027] like Figure 3 and Figure 4 As shown, the safety sensing module 10 is used to collect the operating status parameters of the cabinet 1, including: a cabinet door status detection unit 13 for detecting the opening or closing status of the cabinet door; a DC busbar current acquisition unit 14 for detecting the real-time operating current of the busbar; a DC busbar temperature acquisition unit 15 for detecting the temperature at key locations of the busbar; a status feedback unit for the electric DC disconnect switch 6 for providing feedback on the switch's open / closed status; and an ambient temperature and humidity detection unit 17 and an arc detection unit 16. Each detection unit collects the corresponding operating status parameters and inputs the collected signals to the safety sensing module 101. The safety sensing module 10 summarizes and processes the signals and outputs them to the PLC control unit 9. The above operating status parameters are input to the PLC control unit 9, which has a risk level determination module 18 for logically analyzing the collected operating status parameters according to preset determination rules.

[0028] like Figure 5 As shown, in one embodiment, the risk levels are divided into at least Level 1 risk, Level 2 risk, and Level 3 risk: When the cabinet door is detected to be open and the busbar is under high voltage load, it is determined to be a Level 1 risk. When the busbar temperature is detected to continuously exceed the set threshold, it is determined to be a level 2 risk. When abnormal current fluctuations or a single abnormal signal are detected, it is judged as a level three risk.

[0029] When the risk level is determined to be Level 1, the PLC control unit 9 outputs a forced trip command to the control execution module 11, controls the electric DC disconnect switch 6 to trip immediately, and triggers an audible and visual alarm through the audible and visual alarm unit 20.

[0030] When the risk is determined to be level 2, the PLC control unit 9 first executes a delayed load reduction control. If the risk persists within a preset time, the electric DC disconnect switch 6 is then opened.

[0031] When a risk level is determined to be level three, the system generates an early warning signal and records operational data.

[0032] The control module 4 also includes an event recording unit 19, which stores and records the risk level determination result, trigger time and execution action, and sends them to the outside world through the communication interface module 12.

[0033] like Figure 6 As shown, the present invention also provides a safety linkage control method applied to the above-mentioned energy storage control combiner cabinet, comprising the following steps: S1: Real-time acquisition of cabinet door status signal, DC busbar 5 current signal, busbar temperature signal and disconnector switch status feedback signal; S2: Cross-verify the cabinet door status signal and the DC bus 5 current signal to determine whether there is a high-voltage load-bearing door open state; S3: Perform time window analysis on the busbar temperature signal to determine if there is a continuous temperature rise anomaly; S4: Generate a risk level signal based on the above judgment results; S5: Send a linkage control command to the control execution module 11 based on the risk level signal; S6: Performs immediate tripping, delayed control, or early warning processing; S7: Record risk event information and upload it via the communication interface; S8: When the operating status parameters recover to the safe threshold range within a continuous preset time, a reset operation is allowed.

[0034] In another embodiment, the risk level determination module 18 dynamically adjusts the temperature threshold or current fluctuation threshold based on historical operating data to improve the system's adaptability to different operating conditions.

[0035] In another embodiment, the control module 4 is equipped with a backup power supply unit. When the AC auxiliary power supply is abnormal, the backup power supply unit maintains the operation of the PLC control unit 9 to ensure safe power-off action and data preservation.

[0036] In a further embodiment, the arc detection unit 16 is used to send an abnormal signal to the PLC control unit 9 when an abnormal arc occurs on the DC bus 5, and the PLC control unit 9 immediately performs a forced tripping action.

[0037] Through the above structure and method, the present invention realizes real-time monitoring of the multi-parameter operating status of the energy storage control combiner cabinet, risk level determination and hierarchical linkage control, forming a complete safety closed-loop control system, and improving the safety and system reliability under high-voltage operating environment.

[0038] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. An energy storage control combiner cabinet, characterized in that, include: The cabinet contains a DC combiner module, an AC auxiliary power supply module, and a control module. The DC combiner module includes a DC busbar, an electric DC disconnect switch, and a fuse, and multiple battery clusters are combined through the DC busbar. The control module includes a PLC control unit and a safety sensing module and a control execution module connected thereto. The safety sensing module is used to collect the operating status parameters of the cabinet in real time. The operating status parameters include at least the door status detection unit signal, the DC busbar current acquisition unit signal, the DC busbar temperature acquisition unit signal, and the status feedback signal of the electric DC disconnect switch. The PLC control unit is used to determine the risk level based on the operating status parameters, and output the corresponding linkage control command to the control execution module based on the determination result; The control execution module is used to control the electric DC disconnect switch to perform graded protection actions according to the linkage control command.

2. The energy storage control combiner cabinet according to claim 1, characterized in that, The safety sensing module also includes an environmental temperature and humidity detection unit and an electric arc detection unit.

3. The energy storage control combiner cabinet according to claim 1, characterized in that, The PLC control unit is equipped with a risk level determination module, which is used to classify risks into at least level one risk, level two risk, and level three risk according to preset determination rules.

4. The energy storage control combiner cabinet according to claim 3, characterized in that, When the risk level is determined to be Level 1, the PLC control unit controls the electric DC disconnect switch to immediately trip and triggers an audible and visual alarm.

5. The energy storage control combiner cabinet according to claim 3, characterized in that, When the risk is determined to be level two, the PLC control unit first performs a delayed load reduction control. If the risk persists within a preset time, the PLC control unit controls the electric DC disconnect switch to open.

6. The energy storage control combiner cabinet according to claim 1, characterized in that, The control module also includes an event recording unit, which stores and records the risk level determination result, trigger time and execution action, and sends them to the outside world through a communication interface module.

7. A safety linkage control method applied to an energy storage control combiner cabinet according to any one of claims 1 to 6, characterized in that, Includes the following steps: S1: Real-time acquisition of cabinet door status signal, DC busbar current signal, busbar temperature signal and disconnector switch status feedback signal; S2: Cross-verify the cabinet door status signal and the DC bus current signal to determine whether there is a high-voltage load-bearing door open state; S3: Perform time window analysis on the busbar temperature signal to determine if there is a continuous temperature rise anomaly; S4: Generate a risk level signal based on the above judgment results; S5: Send linkage control commands to the control execution module based on the risk level signal; S6: Performs immediate tripping, delayed control, or early warning processing; S7: Record risk event information and upload it via the communication interface; S8: When the operating status parameters recover to the safe threshold range within a continuous preset time, a reset operation is allowed.

8. The safety linkage control method for an energy storage control combiner cabinet according to claim 7, characterized in that, In step S2, the cabinet door status signal and the DC bus current signal are cross-verified to determine whether the cabinet is in a high-voltage load-bearing open state.

9. A safety linkage control method for an energy storage control combiner cabinet according to claim 7, characterized in that, In step S2, the DC bus temperature signal is analyzed over a time window to determine whether there is a continuous temperature rise anomaly.

10. A safety linkage control method for an energy storage control combiner cabinet according to claim 7, characterized in that, After the protection action is performed, a risk removal determination step is also included. If the operating status parameters recover to the safe threshold range within a continuous preset time, a reset operation is allowed.

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