A fault isolation module and an energy storage PCS general control cabinet with the same

Abstract

The utility model relates to the technical field of energy storage, especially a fault isolation module, including information acquisition module, information acquisition module output end is connected with the isolation chip, the storage chip is connected with the isolation chip through main control chip, and the control output pin of main control chip is connected to the isolation circuit breaker, the information acquisition module includes the direct current side current sensor, alternating current side voltage sensor, temperature sensor and threshold value comparator connected on the input pin of isolation chip, the input end pin of isolation chip output pin and main control chip is connected, and the fault isolation module passes through the electrical isolation design and distributed sensing, improves signal detection precision and anti -interference ability, and the hierarchical control architecture gives consideration to system scheduling and local protection, promotes response speed and reliability, constructs the network type control and the fast breaking device combination, ensures the stable operation under the complex power grid environment, is applicable to large -scale energy storage power station and micro -grid scene.

Description

Technical Field

[0001] This utility model relates to the technical field of energy storage, and in particular to a fault isolation module and an energy storage PCS control cabinet having the module. Background Technology

[0002] With the rapid development of the new energy industry, energy storage systems, as a key technology for achieving efficient utilization of renewable energy, are receiving increasing attention for their safety and reliability. Energy storage PCS (Power Conversion System), as the core interface device between the energy storage system and the power grid, is responsible for important functions such as bidirectional power conversion, grid dispatching, and energy management. However, the operating environment of energy storage systems is complex, and faults such as overcurrent, overvoltage, and abnormal temperature may occur on both the DC and AC sides. If these faults are not detected and isolated in a timely manner, they may lead to equipment damage or even safety accidents.

[0003] In existing technologies, fault detection in energy storage PCS often relies on a single sensor or a centralized control architecture, which suffers from response delays and untimely isolation. Some systems adopt distributed detection schemes, but the sensor signals are not effectively isolated and are susceptible to electromagnetic interference, affecting detection accuracy. They also lack adaptability in complex power grid environments. Therefore, there is an urgent need for a fault isolation module with high reliability and fast response capabilities, as well as an energy storage PCS central control cabinet that integrates this module, to achieve accurate fault detection, rapid isolation, and stable system operation. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the problem that fault isolation modules and energy storage PCS control cabinets with such modules are difficult to detect and quickly isolate in the above or existing technologies, this utility model is proposed.

[0006] Therefore, one of the objectives of this utility model is to provide a fault isolation module.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a fault isolation module, including an information acquisition module, the output terminal of which is connected to an isolation chip, the isolation chip being connected to a storage chip via a main control chip, and the control output pin of the main control chip being connected to an isolation circuit breaker; the information acquisition module includes a DC-side current sensor, an AC-side voltage sensor, a temperature sensor, and a threshold comparator connected to the input pins of the isolation chip; the output pin of the isolation chip is connected to the input pin of the main control chip; and the output pin of the main control chip is connected to the storage chip.

[0008] In a preferred embodiment of the fault isolation module of this utility model, the digital output pin of the DC-side current sensor is connected to the digital input pin INB of the isolation chip; the digital output pin of the AC-side voltage sensor is connected to the digital input pin INC of the isolation chip; and the digital output pin of the temperature sensor is connected to the digital input pin IND of the isolation chip.

[0009] In a preferred embodiment of the fault isolation module of this utility model, the non-inverting input pin of the threshold comparator is connected to the signal output pin of the DC-side current sensor; the digital output pin of the threshold comparator is connected to the digital input pin INA of the isolation chip.

[0010] In a preferred embodiment of the fault isolation module of this utility model, the digital output pin of the isolation chip is connected to the detection pin of the main control chip.

[0011] In a preferred embodiment of the fault isolation module of this utility model, the digital input pins INA, INB, INC and IND of the isolation chip are connected to the output pins OUTA, OUTB, OUTC and OUTD of the isolation chip.

[0012] In a preferred embodiment of the fault isolation module of this utility model, the digital output pin OUTA of the isolation chip is connected to the digital input pin of the main control chip; the digital output pins OUTB, OUTC and OUTD of the isolation chip are connected to the corresponding sensor input pins of the main control chip.

[0013] In a preferred embodiment of the fault isolation module of this utility model, the digital output pin FPGA DO0 of the main control chip is connected to the output enable pin OE of the storage chip; the digital output pins FPGA DO1, FPGA DO2, FPGA DO3, and FPGA DO4 of the main control chip are connected to the data input pins D0, D1, D2, and D3 of the storage chip; and the digital output pin FPGA DO5 of the main control chip is connected to the data latch pin LE of the storage chip.

[0014] Another objective of this utility model is to provide an energy storage PCS central control cabinet, including a cabinet body and a cabinet door. The cabinet body is equipped with a fault isolation module, a data processing module, a central processor and an energy storage module, as well as a heat sink installed on the cabinet door. The central processor is connected to the fault isolation module, the data processing module and the energy storage module respectively.

[0015] As a preferred embodiment of the energy storage PCS control cabinet of this utility model, the cabinet is provided with a first storage space and a second storage space that are reasonably distributed inside.

[0016] As a preferred embodiment of the energy storage PCS control cabinet of this utility model, the energy storage module is located in the first storage space, and the fault isolation module, data processing module, and central processor are located in the second storage space.

[0017] The advantages of the fault isolation module and the energy storage PCS control cabinet with the module are as follows: The fault isolation module improves signal detection accuracy and anti-interference capability through electrical isolation design and distributed sensing. The hierarchical control architecture takes into account both system scheduling and local protection, improving response speed and reliability. The combination of grid-type control and fast disconnection device ensures stable operation in complex power grid environments. It is suitable for large-scale energy storage power stations and microgrid scenarios. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments 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.

[0019] Figure 1 This is a schematic diagram of the fault isolation module.

[0020] Figure 2 This is a schematic diagram of some components of the fault isolation module.

[0021] Figure 3 This is a schematic diagram of the fault isolation module, the information acquisition module, and the isolation module.

[0022] Figure 4 This is a schematic diagram of the information acquisition module of the fault isolation module.

[0023] Figure 5 This is a schematic diagram of the threshold comparator for the fault isolation module.

[0024] Figure 6 This is a schematic diagram of the main control cabinet for energy storage PCS. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0028] Example 1, referring to Figures 1-5 This is the first embodiment of the present invention. This embodiment provides a fault isolation module, including an information acquisition module 100. The output terminal of the information acquisition module 100 is connected to an isolation chip 200. The isolation chip 200 is connected to a storage chip 400 through a main control chip 300. The control output pin of the main control chip 300 is connected to an isolation circuit breaker 500. The information acquisition module 100 includes a DC-side current sensor 101, an AC-side voltage sensor 102, a temperature sensor 103, and a threshold comparator 104 connected to the input pins of the isolation chip 200. The output pin of the isolation chip 200 is connected to the input pin of the main control chip 300. The output pin of the main control chip 300 is connected to the storage chip 400.

[0029] Furthermore, the DC-side current sensor 101 adopts the Hall effect principle, with a measurement range of 0-1000A, an accuracy class of 0.5, a linearity of ≤0.2%, and a temperature drift coefficient of ≤50ppm / ℃, and can acquire the DC-side bus current in real time; the AC-side voltage sensor 102 adopts a voltage transformer isolation design, with an input range of 0-35kV, which is converted into a 0-5V analog signal through a resistor voltage divider network, and a frequency response range of 20~2000Hz, suitable for monitoring the AC-side grid voltage; the temperature sensor 103 adopts a digital chip, with a measurement range of -55℃ to +125℃, an accuracy of ±0.5℃-10℃ to +85℃, and is connected to the isolation module through a single bus, which can monitor the temperature of power devices and key parts of the cabinet 601; the threshold comparator 104 adopts a high-speed operational amplifier, with an input offset voltage and bandwidth, and compares the analog signal output by the DC-side current sensor 101 with a preset threshold. When the threshold is exceeded, a high-level signal is output to realize rapid overcurrent warning.

[0030] Example 2, refer to Figures 1-5 This is the second embodiment of the present invention. Unlike the previous embodiment, the pin connections between the components are as follows: the digital output pin of the DC-side current sensor 101 is connected to the digital input pin INB of the isolation chip 200; the digital output pin of the AC-side voltage sensor 102 is connected to the digital input pin INC of the isolation chip 200; the digital output pin of the temperature sensor 103 is connected to the digital input pin IND of the isolation chip 200; the non-inverting input pin of the threshold comparator 104 is connected to the signal output pin of the DC-side current sensor 101; and the digital output pin of the threshold comparator 104 is connected to the digital input pin INA of the isolation chip 200. Each digital input pin of the isolation chip 200 is matched with one digital output pin. The digital output pins of the isolation chip 200 are connected to the detection pins of the main control chip 300.

[0031] The digital input pins INA, INB, INC, and IND of isolation chip 200 are connected to the output pins OUTA, OUTB, OUTC, and OUTD of isolation chip 200. The digital output pin OUTA of isolation chip 200 is connected to the digital input pin of the main control chip 300; the digital output pins OUTB, OUTC, and OUTD of isolation chip 200 are connected to the corresponding sensor input pins of the main control chip 300.

[0032] The Isolation Chip 200 employs an ISO7740 four-channel digital isolator, with each channel independently providing electrical isolation between input and output. The isolation barrier is made of polyimide and can withstand an isolation withstand voltage of 2500Vrms for 1 minute. Its operating temperature range is -40℃ to +125℃, meeting industrial-grade application requirements. The Isolation Chip 200 integrates a Schmitt trigger, effectively suppressing glitches in the input signal and ensuring accurate signal transmission. The creepage distance between input and output pins is ≥8mm, and the clearance is ≥8mm, complying with IEC61010-1 safety standards.

[0033] The digital output pin FPGA DO0 of the main control chip 300 is connected to the output enable pin OE of the memory chip 400; the digital output pins FPGA DO1, FPGA DO2, FPGA DO3, and FPGA DO4 of the main control chip 300 are connected to the data input pins D0, D1, D2, and D3 of the memory chip 400; and the digital output pin FPGA DO5 of the main control chip 300 is connected to the data latch pin LE of the memory chip 400.

[0034] Furthermore, the main control chip 300300 features a floating-point arithmetic unit, enabling rapid processing of multi-channel sensor data. The controller has a built-in 12-bit ADC with a sampling rate ≥1MSPS. Combined with external signal conditioning circuitry, it achieves high-precision acquisition of analog signals. The main control chip 300 communicates with the isolation module via an SPI bus. The bus uses differential signal transmission, providing strong anti-interference capabilities. The controller also includes a built-in watchdog timer, which automatically resets the system in case of program malfunction, improving system reliability.

[0035] Regarding the storage chip 400, the storage chip 400 is used to record electrical parameters, timestamps, and action logs when a fault occurs. Each record includes 20 data fields and can store no less than 100,000 fault records, which facilitates subsequent fault analysis and system optimization.

[0036] Preferably, the isolating circuit breaker 500 adopts a magnetic blow-out DC circuit breaker with a rated voltage of DC1500V, a rated current of 630A, a breaking time of ≤5ms, and has both manual and electric operation modes. The circuit breaker's auxiliary contacts output opening and closing status signals, which are fed back to the main control chip 300 for status monitoring.

[0037] The rest of the structure is the same as in Example 1.

[0038] Example 3, referring to Figure 1 and 6 This is the third embodiment of the present invention. Unlike the previous embodiment, an energy storage PCS central control cabinet includes a cabinet body 601 and a cabinet door 602. The cabinet body 601 is equipped with a fault isolation module 603, a data processing module 603, a central processor 604 and an energy storage module 605, as well as a heat sink 606 installed on the cabinet door 602. The central processor 604 is connected to the fault isolation module 603, the data processing module 603 and the energy storage module 605 respectively.

[0039] Furthermore, the heat sink 606 is located on one side of the energy storage module 605. The heat sink 606 can effectively dissipate heat from the energy storage module 605 and improve the stability of the device during operation.

[0040] The cabinet 601 has a rationally distributed first storage space A and a second storage space B. The energy storage module 605 is located in the first storage space A, and the fault isolation module, data processing module 603, and central processor 604 are located in the second storage space B.

[0041] The cabinet 601 is equipped with a first storage space A and a second storage space B, which can separate the energy storage device from the control device. During maintenance, only one side door needs to be opened for repair.

[0042] In summary, this technical solution provides an assembly scheme for cabinet 601.

[0043] The rest of the structure is the same as in Example 2.

[0044] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0045] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0046] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fault isolation module (Z), characterized in that: It includes an information acquisition module (100), the output terminal of which is connected to an isolation chip (200), the isolation chip (200) is connected to a storage chip (400) through a main control chip (300), and the control output pin of the main control chip (300) is connected to an isolation circuit breaker (500). The information acquisition module (100) includes a DC-side current sensor (101), an AC-side voltage sensor (102), a temperature sensor (103), and a threshold comparator (104) connected to the input pin of the isolation chip (200); The output pin of the isolation chip (200) is connected to the input pin of the main control chip (300); The output pins of the main control chip (300) are connected to the memory chip (400).

2. The fault isolation module (Z) as described in claim 1, characterized in that: The digital output pin of the DC-side current sensor (101) is connected to the digital input pin INB of the isolation chip (200); The digital output pin of the AC side voltage sensor (102) is connected to the digital input pin INC of the isolation chip (200); The digital output pin of the temperature sensor (103) is connected to the digital input pin IND of the isolation chip (200).

3. The fault isolation module (Z) as described in claim 2, characterized in that: The non-inverting input pin of the threshold comparator (104) is connected to the signal output pin of the DC-side current sensor (101); The digital output pin of the threshold comparator (104) is connected to the digital input pin INA of the isolation chip (200).

4. The fault isolation module (Z) as described in claim 2 or 3, characterized in that: The digital output pin of the isolation chip (200) is connected to the detection pin of the main control chip (300).

5. The fault isolation module (Z) as described in claim 4, characterized in that: The digital input pins INA, INB, INC and IND of the isolation chip (200) are connected to the output pins OUTA, OUTB, OUTC and OUTD of the isolation chip (200).

6. The fault isolation module (Z) as described in claim 3 or 5, characterized in that: The digital output pin OUTA of the isolation chip (200) is connected to the digital input pin of the main control chip (300); The digital output pins OUTB, OUTC and OUTD of the isolation chip (200) are connected to the sensor input pins of the corresponding main control chip (300).

7. The fault isolation module (Z) as described in any one of claims 1, 2, 3, and 5, characterized in that: The digital output pin FPGA DO0 of the main control chip (300) is connected to the output enable pin OE of the memory chip (400); The digital output pins FPGA DO1, FPGA DO2, FPGA DO3, and FPGA DO4 of the main control chip (300) are connected to the data input pins D0, D1, D2, and D3 of the storage chip (400). The digital output pin FPGA DO5 of the main control chip (300) is connected to the data latch pin LE of the memory chip (400).

8. A central control cabinet for energy storage PCS, characterized in that: It includes a cabinet (601) and a cabinet door (602). The cabinet (601) is equipped with a fault isolation module (Z), a data processing module (603), a central processor (604) and an energy storage module (605), as well as a radiator (606) installed on the cabinet door (602). The central processor (604) is connected to the fault isolation module (Z), the data processing module (603), and the energy storage module (605), respectively.

9. The energy storage PCS central control cabinet as described in claim 8, characterized in that: The cabinet (601) has a first storage space (A) and a second storage space (B) that are reasonably distributed inside.

10. The energy storage PCS central control cabinet as described in claim 9, characterized in that: The energy storage module (605) is located in the first storage space (A), and the fault isolation module (Z), data processing module (603), and central processor (604) are located in the second storage space (B).

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