Disconnector system, energy storage valve sub-module and energy storage system

Abstract

The application relates to an isolating switch system, an energy storage valve sub-module and an energy storage system. The isolating switch device is provided with an opening switch and two or more opening coils performing an opening function, the opening switch is connected with a first target isolation component and a second target isolation component respectively, and each opening coil is connected with a driving device. When the driving device detects that the opening condition is met, the driving device operates to turn on the connection between each opening coil and a power supply, that is, to control the opening coil to be powered. At this time, the opening coil in the normal state is powered, and the connection between the first target isolation component and the second target isolation component is disconnected after the opening switch is operated by the successful opening of at least one opening coil. Through the scheme, the isolating switch device is provided with multiple opening coils, so that even if part of the opening coils fails, the electrical isolation of the first target isolation component and the second target isolation component will not be affected, and the opening reliability is high.

Description

Technical Field

[0001] This application relates to the field of energy storage safety technology, and in particular to a disconnecting switch system, an energy storage valve submodule, and an energy storage system. Background Technology

[0002] With the development of power grids, energy storage technology has become a crucial component. Among various energy storage technologies, high-voltage direct-connected energy storage technology integrates the VSC (Voltage Source Converter) converter valve with the energy storage valve, offering advantages such as high modularity, low network loss, good economic benefits, and high operational reliability. In high-voltage direct-connected energy storage systems, disconnecting switches are widely used and are of great significance for the reliable operation of the energy storage system.

[0003] However, in related technologies, when the disconnecting switch needs to be opened to achieve electrical isolation, the disconnecting switch is prone to failure to open, resulting in poor reliability of the disconnecting switch opening. Summary of the Invention

[0004] Therefore, it is necessary to provide a disconnecting switch system, an energy storage valve submodule, and an energy storage system to reduce the possibility of disconnecting switch tripping failure and improve the reliability of disconnecting switch tripping.

[0005] A disconnecting switch system includes: a disconnecting switch device and a driving device, wherein the disconnecting switch device includes two or more trip coils, each of the trip coils driving the same tripping switch; the driving device is connected to each of the trip coils.

[0006] The aforementioned disconnecting switch system includes a tripping switch and two or more tripping coils that perform the tripping function. The tripping switch is connected to a first target isolation component and a second target isolation component, respectively. When the drive device detects that the tripping conditions are met, it energizes each tripping coil. At this time, the tripping coil in its normal state is energized and performs the tripping action. After at least one tripping coil is energized, the tripping switch is activated, disconnecting the connection between the first and second target isolation components, thus electrically isolating them. With this design, the disconnecting switch device uses multiple tripping coils; even if some tripping coils fail, the electrical isolation between the first and second target isolation components will not be affected, resulting in high tripping reliability.

[0007] In some embodiments, the disconnecting switch device further includes a closing switch and a closing coil, the closing coil being connected to the driving device and used to drive the closing switch.

[0008] The above scheme further includes a closing coil and a closing switch in the disconnecting switch device. The closing coil drives the closing switch to close, thereby connecting the first target isolation component and the second target isolation component, realizing a reliable connection between the first target isolation component and the second target isolation component, and improving the operational reliability of the disconnecting switch device.

[0009] In some embodiments, the number of closing coils may include one or more, and the closing coils drive the same closing switch.

[0010] This method, using a single closing coil to achieve the closing function, effectively reduces the circuit size of the disconnector system and lowers costs. Alternatively, multiple closing coils can be used; even if some closing coils fail, closing can still be achieved, maintaining the connection between the first and second target isolation components, thus providing high closing reliability.

[0011] In some embodiments, the driving device includes a driving assembly, which includes at least two tripping driving switches and at least one closing driving switch, wherein the tripping driving switches are connected to the tripping coil and the closing driving switch is connected to the closing coil.

[0012] The above scheme includes a drive unit, with at least one closing drive switch and at least two opening drive switches in the same drive unit. Different opening coils are driven to open through the same drive unit, which can effectively reduce the size of the drive unit and save hardware costs.

[0013] In some embodiments, the driving device includes a first driving component and a second driving component. The first driving component includes at least one tripping driving switch and at least one closing driving switch. The second driving component includes at least one tripping driving switch and at least one closing driving switch. The tripping driving switch is connected to the tripping coil, and the closing driving switch is connected to the closing coil.

[0014] The above scheme includes a first drive component and a second drive component. Different opening coils can be driven to open using different drive components, and different closing coils can be driven to close using different drive components. Even in the event of a drive component failure, opening and closing can still be achieved using another drive component, further improving the operational reliability of the disconnector system.

[0015] In some embodiments, the driving device includes a first driving component and a second driving component. The first driving component includes at least one tripping driving switch and at least one closing driving switch. The second driving component includes at least one tripping driving switch. The tripping driving switch is connected to the tripping coil, and the closing driving switch is connected to the closing coil.

[0016] The above scheme includes a first drive component and a second drive component. Different trip coils can be tripped by different drive components. Even if a drive component fails, tripping can still be achieved by another drive component, which effectively improves the reliability of tripping.

[0017] In some embodiments, the disconnecting switch system further includes a main power supply switch and a redundant power supply switch, at least one of the trip coils is connected to the main power supply switch, at least one of the trip coils is connected to the redundant power supply switch, and the main power supply switch and the redundant power supply switch are respectively used to connect to different power sources.

[0018] The above scheme allows the trip coil to be connected to different power sources via the main power supply switch and the redundant power supply switch, thus achieving redundant power supply for the trip coil. In the event of a failure of one of the power sources, the trip coil connected to different power sources can still drive the trip, effectively improving the reliability of the trip power supply.

[0019] In some embodiments, the disconnecting switch device further includes an energy storage motor and / or a status feedback component, wherein the energy storage motor is connected to the trip coil and the status feedback component is connected to the drive device.

[0020] The above solution incorporates an energy storage motor and / or status feedback components in the disconnecting switch device, enabling more reliable closing and opening drives, as well as closing and opening status feedback, effectively improving the operational reliability of the disconnecting switch system.

[0021] In some embodiments, the disconnector system further includes a control device connected to the drive device.

[0022] The above-mentioned solution also includes a control device in the disconnecting switch system. Through the control device and the drive device, the energization and de-energization control of the opening coil and the closing coil can be realized, which can effectively alleviate the control pressure of individual devices and improve the control reliability of opening and closing.

[0023] This application also provides an energy storage valve submodule, including a power module, an energy storage module, and the above-mentioned disconnecting switch system, wherein the two ends of the disconnecting switch are respectively connected to the power module and the energy storage module.

[0024] In some embodiments, the control device of the disconnecting switch system includes an energy storage module controller and a power module controller, which are respectively connected to the drive device.

[0025] In the above scheme, the control device includes an energy storage module controller and a power module controller. The tripping signal is sent through the energy storage module controller and the power module controller. If either the energy storage module controller or the power module controller fails, the transmission of the tripping signal will not be affected, thus effectively improving the reliability of the tripping signal transmission.

[0026] In some embodiments, at least one tripping coil of the disconnecting switch system is connected to the main bus power supply via a main power supply switch, and at least one tripping coil is connected to the redundant bus power supply via a redundant power supply switch; the closing coil of the disconnecting switch system is connected to the main bus power supply via a main power supply switch, and / or the closing coil is connected to the redundant bus power supply via a redundant power supply switch.

[0027] In the above scheme, both the tripping coil and the closing coil can draw power from the main bus power supply or the redundant bus power supply. Even if one of the power supplies fails, it will not affect the tripping or closing process, further improving the reliability of tripping and closing.

[0028] In some embodiments, the main bus power supply draws power from the main bus between the disconnecting switch device and the energy storage module, and / or, the redundant bus power supply draws power from the main bus between the disconnecting switch device and the energy storage module of an adjacent disconnecting switch system.

[0029] The above scheme draws power from the main bus between the energy storage module and the disconnecting switch device connected to the current disconnecting switch system, or the redundant bus power draws power from the main bus between the energy storage module and the disconnecting switch device connected to the adjacent disconnecting switch system, which has high energy access convenience.

[0030] This application also provides an energy storage system, including a converter valve and an energy storage valve, wherein the energy storage valve includes a cascaded structure of the above-mentioned energy storage valve submodule. Attached Figure Description

[0031] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0032] Figure 1 This is a schematic diagram of the disconnector switch system structure in some embodiments of this application;

[0033] Figure 2 This is a schematic diagram of the disconnector system structure in some other embodiments of this application;

[0034] Figure 3 This is a schematic diagram of the signal flow of the disconnector system in some embodiments of this application;

[0035] Figure 4 This is a schematic diagram of the signal flow of the disconnector system in some other embodiments of this application;

[0036] Figure 5 This is a schematic diagram of the signal flow of the disconnector system in some embodiments of this application;

[0037] Figure 6 This is a schematic diagram of the electrical structure of the disconnector device in some embodiments of this application;

[0038] Figure 7 This is a schematic diagram of the signal flow of the disconnector system in some embodiments of this application;

[0039] Figure 8 This is a schematic diagram of the signal flow of the disconnector system in some other embodiments of this application;

[0040] Figure 9 This is a schematic diagram of the signal flow of the disconnector system in some embodiments of this application. Detailed Implementation

[0041] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0043] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0044] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0045] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0046] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0047] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0048] Currently, judging from market trends, energy storage systems are being used more and more widely, bringing great convenience to daily production and life. High-voltage direct-connected energy storage, due to its highly modular structure, can meet the requirements of high efficiency, high reliability, economy, and safety, and is gradually being developed and applied.

[0049] High-voltage direct-connected energy storage systems integrate voltage source converter valves (VSC converter valves) and energy storage valves, with the energy storage valves comprising multiple cascaded energy storage valve sub-modules. In practical energy storage scenarios, isolating switches are used in various parts of the energy storage system. For a more detailed explanation, let's take each energy storage valve sub-module as an example, where an isolating switch is typically installed between the energy storage module and the power module. When some energy storage valve sub-modules need to be bypassed due to faults or other reasons, it is necessary not only to bypass the corresponding energy storage valve sub-module through the power module's bypass switch but also to control the isolating switch to open, ensuring reliable electrical isolation between the energy storage module and the power module and improving the operational safety of the energy storage valve sub-module. However, after the power module controller of the energy storage valve sub-module sends an opening signal to the isolating switch, the isolating switch often fails to open, severely impacting the operational safety of the energy storage valve sub-module.

[0050] To improve the reliability of the disconnector's tripping operation and ensure reliable electrical isolation between the power module and the energy storage module when the energy storage valve submodule is bypassed, thereby enhancing the operational safety of the energy storage valve submodule, research has revealed that disconnector failure to trip is often due to malfunctions in tripping control-related components, such as a tripping coil failure, which prevents the tripping coil from reliably driving the corresponding tripping switch. Based on this, redundancy can be implemented in the disconnector's tripping control by using at least two sets of tripping-related components that simultaneously perform the tripping action under the action of the tripping signal. In this way, as long as at least one set of tripping-related components successfully operates, electrical isolation between the energy storage module and the power module can be achieved, thus improving the reliability of the disconnector's tripping operation.

[0051] Based on the above considerations, the technical solution of this application provides a disconnecting switch system. The disconnecting switch device has two or more tripping coils, each connected to a driving device. The driving device drives the tripping coil to switch on and off with power, i.e., to be energized or de-energized. Therefore, when the tripping conditions are met, the driving device can connect the tripping coil to the power supply, energizing the tripping coil and driving the corresponding tripping switch to perform the corresponding tripping action, ultimately disconnecting the connection between the energy storage module and the power module.

[0052] In this embodiment, the energization and de-energization control of the trip coil is achieved through a driving device. The driving device operates when the tripping conditions are met. Even if some trip coils fail, the trip coils in normal operation will still be energized through the driving device, thus achieving the tripping function. In other words, with a trip coil in normal operation present, the tripping function can be achieved based on the tripping signal, exhibiting high tripping reliability.

[0053] The solution of this application embodiment can be applied to any electronic device that requires the opening of a disconnecting switch to achieve electrical isolation. Specifically, the disconnecting switch is connected to a first target isolation component and a second target isolation component that require electrical isolation. When there is a need to open the circuit, the connection between the opening coil of the disconnecting switch device and the power supply is activated by the operation of the driving device, so that the opening coil has the conditions for opening and thus performs the opening action. Finally, when at least one opening coil successfully opens the circuit, electrical isolation between the first target isolation component and the second target isolation component is achieved.

[0054] In a more detailed embodiment, the disconnecting switch system can be applied in energy storage scenarios. The disconnecting switch is set between any two energy storage system components that require electrical isolation. Reliable electrical isolation between the energy storage system components is achieved by opening the disconnecting switch.

[0055] Furthermore, in a more detailed embodiment, the disconnecting switch system is applied in the energy storage valve submodule. The first target isolation component includes a power module, and the second target isolation component includes an energy storage module. When the power module is bypassed, the drive device is activated to successfully trip at least one tripping coil, thereby electrically isolating the power module and the energy storage module.

[0056] For ease of understanding of the technical solution of this application, it can be understood below that the disconnecting switch system is applied in the energy storage valve submodule, the first target isolation component includes a power module, and the second target isolation component includes an energy storage module.

[0057] Please refer to the following: Figure 1 This application provides a disconnecting switch system, including: a disconnecting switch device 112 and a driving device 114. The disconnecting switch device 112 includes a tripping switch (not shown) and two or more tripping coils 116. Each tripping coil 116 drives the same tripping switch. The driving device 114 is connected to the tripping coils 116 respectively.

[0058] Specifically, the trip coil 116 is connected to both the first target isolation component and the second target isolation component. The first target isolation component is one of the target components that needs to be electrically isolated from other components through a disconnecting switch device. The second target isolation component is another target component that needs to be electrically isolated from other components through a disconnecting switch device. The disconnecting switch device 112 is the switching device that achieves electrical isolation between the first and second target isolation components. The trip coil 116 is the functional device in the disconnecting switch device 112 used to implement the tripping drive. The drive device 114 is the device used to drive the trip coil 116 to switch on and off (i.e., energize or de-energize) the connection between the trip coil 116 and the power supply.

[0059] In the disconnector switch 112, each trip coil 116 is connected to a power source. When driven by the drive device 114, the connection between the trip coil 116 and the power source is disconnected, causing the trip coil 116 to lose power and the trip switch to not operate, thus not performing the tripping function. Conversely, when driven by the drive device 114, the connection between the trip coil 116 and the power source is restored, energizing the trip coil 116 and driving the trip switch to operate, thus performing the tripping function.

[0060] It is understood that there is no single way to determine whether the disconnecting switch system meets the tripping conditions. In one embodiment, when the disconnecting switch system needs to trip, the user or the upper control device sends a tripping command to the disconnecting switch system. After receiving the tripping command, the drive device 114 controls the connection between the tripping coil 116 and the power supply to be made conductive, and the tripping function is realized through the action of the tripping switch.

[0061] In another embodiment, taking the application in the energy storage valve submodule as an example, the drive device 114 can monitor the operating status of the power module in real time. If the power module is detected to trigger the bypass, it is considered that the tripping condition is met.

[0062] It should be noted that the number of tripping coils 116 in the disconnecting switch is not unique. In a more detailed embodiment, two tripping coils 116 can be provided, each connected to a drive device 114 and a power supply, respectively. Both coils simultaneously drive one disconnecting switch. When the tripping conditions are met, the drive device 114 activates, simultaneously connecting the two tripping coils 116 to the power supply. Only one tripping coil 116 needs to be energized to drive the disconnecting switch, thus completing the electrical isolation between the first and second target isolation components. In this way, even if one tripping coil 116 fails, the first and second target isolation components can still be electrically isolated. This improves the reliability of the disconnecting switch's tripping operation while effectively reducing the circuit size of the disconnecting switch system and saving circuit costs.

[0063] In another embodiment, to further improve the tripping reliability of the disconnecting switch, three or more tripping coils 116 can be provided. When the tripping conditions are met, the drive device 114 simultaneously connects each tripping coil 116 to the power supply. At this time, as long as any one tripping coil 116 is energized normally, the first target isolation component and the second target isolation component can be electrically isolated. In this disconnecting switch system, even if two or more disconnecting switch components fail, the tripping function can still be achieved, resulting in higher tripping reliability.

[0064] The aforementioned disconnector system includes a disconnector device 112 equipped with a trip switch and two or more trip coils 116 that perform the tripping function. The trip switch is connected to a first target isolation component and a second target isolation component, respectively, and each trip coil 116 is connected to a drive device 114. When the drive device 114 detects that the tripping conditions are met, the drive device 114 actuates, connecting each trip coil 116 to the power supply. At this time, the trip coils 116 in normal condition are energized. After at least one trip coil 116 is energized and drives the trip switch to actuate, the connection between the first target isolation component and the second target isolation component is disconnected, thus electrically isolating the first and second target isolation components. With this scheme, the disconnector device 112 is equipped with multiple trip coils 116. Even if some trip coils 116 fail, the electrical isolation between the first and second target isolation components will not be affected, resulting in high tripping reliability.

[0065] Please see Figure 2In some embodiments, the disconnector device 112 further includes a closing coil 212 and a closing switch (not shown). The closing coil 212 is connected to the drive device 114 and is used to drive the closing switch.

[0066] Specifically, the closing coil 212 is a functional device that, when energized, connects the first target isolation component and the second target isolation component. In this embodiment, the isolating switch device 112 is also provided with a closing coil 212. The closing switch is connected to the first target isolation component and the second target isolation component respectively, and the closing coil 212 is also connected to the driving device 114. Therefore, under the action of the driving device 114, the closing coil 212 is energized to drive the closing switch to perform the closing action, thus connecting the first target isolation component and the second target isolation component.

[0067] In the above scheme, the disconnecting switch device 112 also includes a closing switch and a closing coil 212. The closing coil 212 drives the closing switch to close, thereby connecting the first target isolation component and the second target isolation component, realizing a reliable connection between the first target isolation component and the second target isolation component, and improving the operational reliability of the disconnecting switch device 112.

[0068] It should be noted that the number of closing coils 212 provided in the disconnecting switch device 112 is not unique. In some embodiments, the number of closing coils 212 includes one or more, and the closing coils 212 drive the same closing switch. That is, in one embodiment, the number of closing coils 212 can be set to one. In this case, the disconnecting switch device 112 has a redundancy function for opening the circuit, and when there is a need for closing, it is achieved through a single closing coil 212. By setting a single closing coil 212 to realize the closing function in this way, the circuit size of the disconnecting switch system can be effectively reduced, and the cost can be lowered.

[0069] In another embodiment, the closing coil 212 can be redundantly configured, with multiple closing coils 212 provided in the same disconnecting switch system. Similar to the opening of the opening coil 116 described above, when the closing conditions are met, the driving device 114 connects the closing coil 212 to the power supply. When at least one closing coil 212 is energized, the closing switch is driven to operate, connecting the first target isolation component and the second target isolation component. In this way, even if some closing coils 212 fail, closing can still be achieved, connecting the first target isolation component and the second target isolation component, resulting in high closing reliability.

[0070] Please see Figure 3In some embodiments, the drive device 114 includes a drive assembly 414, which includes at least two trip drive switches 612 and at least one closing drive switch 614. The trip drive switches 612 are connected to the trip coil 116, and the closing drive switch 614 is connected to the closing coil 212.

[0071] Specifically, the drive component 414 is a functional component used to implement the opening and closing drive functions. In this embodiment, the drive device includes a drive component 414, in which at least two opening drive switches 612 and at least one closing drive switch 614 are provided. The driving of all opening coils 116 and closing coils 212 is achieved through the same drive component 414.

[0072] It is understood that the specific types of the tripping drive switch 612 and the closing drive switch 614 are not unique. Any switching device that can connect the tripping coil 116 to the power supply or the closing coil 212 to the power supply under the action of a tripping signal or a closing signal is acceptable. For example, in a more detailed embodiment, both the tripping drive switch 612 and the closing drive switch 614 include a relay. After receiving a tripping signal, the relay activates its own contact switch to connect the tripping coil 116 to the power supply or the closing coil 212 to the power supply.

[0073] It should be noted that, in a more detailed embodiment, the drive assembly 414 further includes a disconnector drive board, which is a printed circuit board. The opening drive switch 612 and the closing drive switch 614 are integrated on the disconnector drive board, and the internal wiring of the drive assembly 414 is routed on the disconnector drive board. In this way, the drive assembly 414 can be modularly configured, and when there is a need to replace the drive assembly 414, the disconnector drive board can be directly replaced, effectively improving the maintenance convenience of the disconnector system.

[0074] In the above scheme, the drive device 114 includes a drive component 414. The same drive component 414 is provided with at least one closing drive switch 614 and at least two opening drive switches 612. Different opening coils 116 are driven to open through the same drive component 414, which can effectively reduce the size of the drive device 114 and save hardware costs.

[0075] Please see Figure 4In some embodiments, the drive device 114 includes a first drive component 4142 and a second drive component 4144. The first drive component 4142 includes at least one trip drive switch 612 and at least one close drive switch 614. The second drive component 4144 includes at least one trip drive switch 612. The trip drive switch 612 is connected to the trip coil 116, and the close drive switch 614 is connected to the close coil 212.

[0076] Specifically, in this embodiment, the drive device 114 has two drive components. The first drive component 4142 includes at least one opening drive switch 612 and at least one closing drive switch 614, used to implement drive control for opening and closing. The second drive component 4144 only includes the opening drive switch 612, used to implement drive control for opening. Both the first drive component 4142 and the second drive component 4144 include an isolating switch drive board for integrating the opening drive switch 612 and wiring.

[0077] In this embodiment, the isolating switch driver board used to integrate the tripping drive switch 612 and the closing drive switch 614 is redundantly configured. At least one tripping drive switch 612 is set on the isolating switch driver board corresponding to the first drive component 4142, and at least one tripping drive switch 612 is set on the isolating switch driver board corresponding to the second drive component 4144. In the event of a fault in the isolating switch driver board or wiring of the first drive component 4142, the operation of the tripping drive switch 612 in the second drive component 4144 will not be affected.

[0078] In the above scheme, the drive device 114 includes a first drive component 4142 and a second drive component 4144. Different trip coils 116 can be tripped by different drive components. When a drive component fails, it can still be tripped by another drive component, which effectively improves the reliability of tripping.

[0079] Furthermore, in one embodiment, please refer to [reference needed]. Figure 5 The drive device 114 includes a first drive component 4142 and a second drive component 4144. The first drive component 4142 includes at least one trip drive switch 612 and at least one close drive switch 614. The second drive component 4144 includes at least one trip drive switch 612 and at least one close drive switch 614. The trip drive switch 612 is connected to the trip coil 116, and the close drive switch 614 is connected to the close coil 212.

[0080] Specifically, the solution in this embodiment is similar to that in the above embodiments, both using different driving components to achieve the opening drive. The difference is that in this embodiment, the closing coil 212 is also redundantly configured, and different closing coils are driven by different closing drive components.

[0081] In the above scheme, the drive device 114 includes a first drive component 4142 and a second drive component 4144. Different tripping coils 116 can be driven to trip by different drive components, and different closing coils can be driven to close by different drive components. Even if a drive component fails, tripping and closing can still be driven by another drive component, further improving the operational reliability of the disconnector system.

[0082] Please refer to the following: Figures 3-5 In some embodiments, the disconnecting switch system further includes a main power supply switch K1 and a redundant power supply switch K2, with at least one tripping coil 116 connected to the main power supply switch K1 and at least one tripping coil 116 connected to the redundant power supply switch K2. The main power supply switch K1 and the redundant power supply switch K2 are respectively used to connect to different power supplies.

[0083] Specifically, in this embodiment, different tripping coils 116 obtain electrical energy from different power sources. When the main power supply switch K1 is on, the power source connected to the main power supply switch K1 can transmit electrical energy to the tripping coils 116 connected to the main power supply switch K1 for tripping drive. When the redundant power supply switch K2 is on, the power source connected to the redundant power supply switch K2 can transmit electrical energy to the tripping coils 116 connected to the redundant power supply switch K2 for tripping drive.

[0084] In the above scheme, the trip coil 116 can be connected to different power supplies through the main power supply switch K1 and the redundant power supply switch K2 to achieve redundant power supply for the trip coil 116. In the event of a failure of one of the power supplies, the trip coil 116 connected to different power supplies can still drive the trip, effectively improving the reliability of the trip power supply.

[0085] In some embodiments, reference may be made to Figure 6 The disconnector switch 112 also includes an energy storage motor 610 and / or a status feedback component 620. The energy storage motor 610 is connected to the trip coil 116, and the status feedback component 620 is connected to the drive device 114 (not shown).

[0086] Specifically, in this embodiment, the isolating switch device 112 is a switch device of the type with two opening coils and one closing coil. One opening coil 116 is connected to the power supply through connection points C1 and C2, and the other opening coil 116 is connected to the power supply through connection points C11 and C12. The closing coil 212 is connected to the power supply through connection points A1 and A2, while the energy storage motor 610 is connected to the power supply through connection points U1 and U2.

[0087] The energy storage motor 610 is a motor that converts electrical energy into mechanical energy and stores it. Based on the principle of electromagnetic induction, the energy storage motor 610 converts electrical energy into mechanical energy and stores it, releasing it when needed. In the disconnector switch, when the trip coil is energized, the energy storage motor 610 drives the energy storage mechanism to compress the spring of the trip mechanism, causing the spring to generate a certain amount of compression energy. Through the stretching of the spring, the tripping control is achieved. The status feedback component 620 is a device used to monitor the operating status of the disconnector switch device 112 and feed it back to the drive device 114. Specifically, in practical applications, the status feedback component 620 first feeds back the open / closed status of the disconnector switch device 112 to the drive component 414 in the form of an electrical signal. Then, the drive component 414 converts it into an electrical signal and transmits it to the remote end, completing the status feedback.

[0088] The above solution includes an energy storage motor 610 and / or a status feedback component 620 in the disconnector switch 112, which enables more reliable closing and opening drive, as well as opening and closing status feedback, effectively improving the operational reliability of the disconnector switch system.

[0089] Please see Figure 7 In some embodiments, the disconnector system further includes a control device 412, which is connected to the drive device 114.

[0090] Specifically, the drive device 114 is used to drive the opening and closing of the trip coil 116 and the power supply, or to drive the closing coil 212 and the power supply. The control device 412 is used to analyze whether closing or opening is required, and to control the drive device 114 to operate when closing is required, or to control the drive device 114 to operate when opening is required.

[0091] In this embodiment, the disconnector system includes a drive unit 114 and a control unit 412. The control unit 412 can communicate with other controllers to obtain the required disconnector operating status. Upon receiving a tripping signal or detecting that the tripping conditions are met, the control unit 412 sends a tripping control signal to the drive unit 114, causing the drive unit 114 to connect the tripping coil 116 to the power supply. Conversely, upon receiving a closing signal or detecting that the closing conditions are met, the control unit 412 sends a closing control signal to the drive unit 114, causing the drive unit 114 to connect the closing coil 212 to the power supply.

[0092] In a more detailed embodiment, the drive device 114 and the control device 412 are connected by optical fiber. The opening signal output by the control device 412 is transmitted to the drive device 114 in the form of an optical signal. The drive device 114 performs photoelectric signal conversion inside, and finally uses this to control the energization and de-energization of the opening coil 116 or the closing coil 212.

[0093] The above solution, through the cooperation of control device 412 and drive device 114, realizes the energization and de-energization control of the opening coil 116 and the closing coil 212, which can effectively alleviate the control pressure of individual devices and improve the control reliability of opening and closing.

[0094] Some embodiments of this application also provide an energy storage valve submodule, including a power module, an energy storage module, and the above-mentioned disconnecting switch system, wherein the two ends of the disconnecting switch are respectively connected to the power module and the energy storage module.

[0095] Specifically, as shown in the above embodiments and accompanying drawings, the disconnecting switch system in this embodiment connects the disconnecting switch device 112 to the power module and the energy storage module respectively. That is, the power module serves as the first target isolation component, and the energy storage module serves as the second target isolation component. The power module and the energy storage module are connected via a main bus. The disconnecting switch device 112 is located on the main bus between the power module and the energy storage module, dividing the main bus into a main bus between the power module and the disconnecting switch device 112, and a main bus between the disconnecting switch device 112 and the energy storage module. Specifically, the two ends of the trip switch of the disconnecting switch device 112 are connected to the power module and the energy storage module respectively via the main bus.

[0096] In this scheme, the disconnecting switch device 112 is equipped with two or more tripping coils 116 that perform the tripping function. The tripping switch connects the power module and the energy storage module, and each tripping coil 116 is connected to the drive device 114. When the drive device 114 detects that the tripping conditions are met, the drive device 114 operates, connecting each tripping coil 116 to the power supply. At this time, the tripping coils 116 in normal condition are energized. After at least one tripping coil 116 is energized and drives the tripping switch to operate, the connection between the power module and the energy storage module is disconnected, thus electrically isolating the power module and the energy storage module. With this scheme, the disconnecting switch device 112 is equipped with multiple tripping coils 116. Even if some tripping coils 116 fail, the electrical isolation between the power module and the energy storage module will not be affected, resulting in high tripping reliability.

[0097] In some embodiments, please refer to Figure 8 or Figure 9 The control device 412 of the disconnecting switch system includes an energy storage module controller 514 and a power module controller 512, which are respectively connected to the drive device 114.

[0098] Specifically, in this embodiment, taking the application of a disconnecting switch system in an energy storage system as an example, the disconnecting switch system is applied in an energy storage valve submodule. The first target isolation component includes a power module, and the second target isolation component includes an energy storage module. The energy storage module controller 514 is the controller device in the energy storage valve submodule used to control the operation of the energy storage module. The power module controller 512 is the main controller of the energy storage valve submodule, which can be used to control the operation of the power module or to interact with the energy storage module controller 514.

[0099] In this embodiment, the drive device 114 is controlled by dual controllers. That is, the energy storage module controller 514 and the power module controller 512 are respectively connected to the drive device 114. When there is a tripping requirement, the energy storage module controller 514 and the power module controller 512 can simultaneously send tripping signals to the drive device 114. When the drive device 114 receives any one of the tripping signals, it can start to perform the tripping action.

[0100] Similarly, in one embodiment, if there is a closing requirement, the energy storage module controller 514 and the power module controller 512 can simultaneously send closing signals to the drive device 114. Upon receiving any one of the closing signals, the drive device 114 can begin to perform the closing action.

[0101] It is understood that in another embodiment, the closing signal may be sent by either the energy storage module controller 514 or the power module controller 512. When the drive device 114 receives the closing signal sent by the energy storage module controller 514 or the closing signal sent by the power module controller 512, it begins to perform the closing action.

[0102] The above scheme, taking the application of the disconnecting switch system in the energy storage valve sub-module as an example, includes an energy storage module controller 514 and a power module controller 512. The tripping signal is sent through the energy storage module controller 514 and the power module controller 512. If either the energy storage module controller 514 or the power module controller 512 fails, the transmission of the tripping signal will not be affected, effectively improving the reliability of the tripping signal transmission.

[0103] In some embodiments, the power supply includes a main bus power supply and a redundant bus power supply. At least one tripping coil 116 of the disconnecting switch system is connected to the main bus power supply through a main power supply switch K1, and at least one tripping coil 116 is connected to the redundant bus power supply through a redundant power supply switch K2. The closing coil 212 is connected to the main bus power supply through the main power supply switch K1, and / or the closing coil 212 is connected to the redundant bus power supply through the redundant power supply switch K2.

[0104] Specifically, the main bus power supply is the device that draws power from the main bus to provide electrical energy to the trip coil 116 or the closing coil 212. The redundant bus power supply is the device that draws power from the redundant bus to provide electrical energy to the trip coil 116 or the closing coil 212. In this embodiment, to further improve the reliability of tripping, the trip coil 116 is connected to different power supplies. Specifically, some trip coils 116 are connected to the main bus power supply through the main power supply switch K1, and some trip coils 116 are connected to the redundant bus power supply through the redundant power supply switch K2. If the main bus power supply fails, some trip coils 116 can continue to draw power from the redundant bus power supply to achieve the tripping function.

[0105] The closing coil 212 needs to be connected to the power supply according to the actual situation. If there is only one closing coil 212, it can draw power from the main bus power supply or from the redundant bus power supply; the specific source is not limited. If there are two or more closing coils 212, each closing coil 212 can simultaneously draw power from the main bus power supply or simultaneously draw power from the redundant bus power supply. In another embodiment, similar to the opening coil 116, some closing coils 212 can draw power from the main bus power supply, and some can draw power from the redundant bus power supply to improve the power supply reliability of the closing coils 212.

[0106] In the above scheme, either the tripping coil 116 or the closing coil 212 can be powered by the main bus power supply or the redundant bus power supply. Even if one of the power supplies fails, it will not affect the tripping or closing process, thus further improving the reliability of tripping and closing.

[0107] In some embodiments, the main bus power is drawn from the main bus between the disconnecting switch device and the second target isolation component.

[0108] And / or, in some embodiments, the redundant bus power supply draws power from the main bus between the disconnecting switch device of the adjacent disconnecting switch system and the second target isolation component.

[0109] Specifically, in the above embodiment, the first target isolation component and the second target isolation component are connected via a main busbar. A disconnecting switch is installed on the main busbar. The main busbar power supply is connected to the main busbar between the disconnecting switch and the second target isolation component, obtaining electrical energy from the main busbar, which is then converted and stored to obtain suitable operating energy for the tripping coil 116 and the closing coil 212. In practical applications, the number of the first and second target isolation components is not unique. Each group of first and second target isolation components requires electrical isolation through a disconnecting switch system. Therefore, a redundant busbar power supply can be connected between other groups of first and second target isolation components, drawing power from the main busbar between these other groups, and then converting and storing it as redundant busbar power.

[0110] It is understood that in other embodiments, the redundant bus power supply can also draw power from other power sources, such as independently set power supply devices, etc. There is no specific limitation, and the selection can be made according to actual needs.

[0111] To illustrate this in more detail, let's take the application of a disconnector system in an energy storage valve submodule as an example. In this case, the main bus power supply draws energy from the main bus (i.e., the battery bus) between the disconnector and the energy storage module within the current disconnector system's energy storage valve submodule. The redundant bus power supply, on the other hand, draws energy from the main bus between the disconnector and the energy storage module of other energy storage valve submodules. Specifically, to reduce power lines and lower the risk of energy extraction, the redundant bus power supply can draw energy from the main bus of an adjacent energy storage valve submodule.

[0112] With this energy extraction method, even if the disconnecting switch is tripped under the action of the drive device, disconnecting the connection between the power module and the energy storage module, the disconnecting switch can still continue to obtain power from the energy storage module through the main bus between the disconnecting switch and the energy storage module, maintain the tripping function, and improve the reliability of tripping.

[0113] The above scheme provides high energy access convenience, where the main bus power supply draws energy from the main bus between the first and second target isolation components connected to the current disconnecting switch system, or the redundant bus power supply module draws energy from the main bus between the first and second target isolation components connected to adjacent disconnecting switch systems.

[0114] To facilitate understanding of the technical solution of this application, the following detailed embodiments will be used to explain and illustrate this application.

[0115] Please refer to the following: Figure 8 In this embodiment, the disconnecting switch system is applied to the energy storage valve submodule. The first target isolation component and the second target isolation component are the power module and the energy storage module, respectively. The disconnecting switch system includes a drive device 114 and a control device 412. The control device 412 includes an energy storage module controller 514 and a power module controller 512. The drive device 114 includes a first drive assembly 4142 and a second drive assembly 4144. The first drive assembly 4142 includes at least one opening drive switch 612 and at least one closing drive switch 614. Similarly, the second drive assembly 4144 includes at least one opening drive switch 612 and at least one closing drive switch 614. Correspondingly, the disconnecting switch device 112 is equipped with a corresponding number of opening coils 116 and closing coils 212. Each opening drive switch 612 drives one opening coil 116, and each closing drive switch 614 drives one closing coil 212. Each closing coil 212 drives the same closing switch, and each opening coil 116 drives the same opening switch. Both the closing drive switch 614 and the opening drive switch 612 are relays.

[0116] In the first drive assembly 4142, each of the opening drive switches 612 and closing drive switches 614 is connected to the energy storage module controller 514. In the second drive assembly 4144, each of the opening drive switches 612 and closing drive switches 614 is connected to the power module controller 512. The opening switches are connected to the energy storage module and the power module respectively, and the closing switches are connected to the energy storage module and the power module respectively.

[0117] Furthermore, some of the tripping coils 116 are connected to the main bus power supply via the main power supply switch K1. The main bus power supply draws power from the main bus of the current energy storage valve submodule (specifically, the main bus between the isolating switch device 112 and the energy storage module). Some of the tripping coils 116 are connected to the redundant bus power supply via the redundant power supply switch K2. The redundant bus power supply draws power from the main bus of the adjacent energy storage valve submodule (also connected to the main bus between the isolating switch device 112 and the energy storage module). Additionally, some of the closing coils 212 are connected to the main bus power supply via the main power supply switch K1, and some of the closing coils 212 are connected to the redundant bus power supply via the redundant power supply switch K2.

[0118] When the tripping conditions are met, the energy storage module controller 514 sends tripping signals to each tripping drive switch 612 in the first drive assembly 4142, and the power module controller 512 sends tripping signals to each tripping drive switch 612 in the second drive assembly 4144. Afterwards, each tripping drive switch 612 actuates, connecting the corresponding tripping coil 116 to the power supply. Once at least one tripping coil 116 is energized, causing the tripping switch to actuate, the connection between the power module and the energy storage module is disconnected, achieving electrical isolation.

[0119] When the closing conditions are met, the energy storage module controller 514 sends closing signals to each closing drive switch 614 in the first drive assembly 4142, and the power module controller 512 sends closing signals to each closing drive switch 614 in the second drive assembly 4144. Subsequently, each closing drive switch 614 actuates, connecting the corresponding closing coil 212 to the power supply. After at least one closing coil 212 is energized, causing the closing switch to actuate, the connection between the power module and the energy storage module is established, thus closing the isolating switch.

[0120] In some embodiments of this application, an energy storage system is also provided, including a converter valve and the above-described energy storage valve submodule.

[0121] Specifically, as shown in the above embodiments and accompanying drawings, the energy storage valve submodules can be cascaded to form an energy storage valve in practical applications. This solution further applies the energy storage valve submodules to an energy storage system. The isolating switch device 112 is equipped with two or more trip coils 116 that perform tripping functions. The trip switch is connected to the power module and the energy storage module respectively, and each trip coil 116 is connected to a power source via a drive device 114. When the drive device 114 detects that the tripping conditions are met, the drive device 114 operates, connecting each trip coil 116 to the power source. At this time, the trip coil 116 in normal condition is energized and performs the tripping action. After at least one trip coil 116 successfully trips, the connection between the power module and the energy storage module is disconnected, thus electrically isolating the power module and the energy storage module. Through this solution, the isolating switch device 112 is equipped with multiple trip coils 116. Even if some trip coils 116 fail, the electrical isolation between the power module and the energy storage module will not be affected, resulting in high tripping reliability.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A disconnector switch system, characterized in that, include: A disconnecting switch device, the disconnecting switch device including a tripping switch and two or more tripping coils, each of the tripping coils driving the same tripping switch; The drive device is connected to the trip coil respectively; A control device is connected to the drive device. The control device is used to send a trip control signal to the drive device when it receives a trip signal or when it monitors that the trip conditions are met, so that the drive device can simultaneously connect each of the trip coils to the power supply. A closing switch and a closing coil, wherein the closing coil is connected to the driving device and is used to drive the closing switch; A main power supply switch and a redundant power supply switch, wherein at least one of the trip coils is connected to the main power supply switch and at least one of the trip coils is connected to the redundant power supply switch, and the main power supply switch and the redundant power supply switch are respectively used to connect to different power sources; The driving device includes a driving assembly, which includes a tripping driving switch, a closing driving switch, and a disconnecting switch driving board. The tripping driving switch is connected to the tripping coil, and the closing driving switch is connected to the closing coil. The tripping driving switch and the closing driving switch are integrated on the disconnecting switch driving board to form a modular driving assembly.

2. The disconnector system according to claim 1, characterized in that, The number of closing coils may include one or more, and the closing coils drive the same closing switch.

3. The disconnecting switch system according to claim 1 or 2, characterized in that, The drive assembly includes at least two trip drive switches and at least one closing drive switch.

4. The disconnecting switch system according to claim 1 or 2, characterized in that, The driving device includes a first driving component and a second driving component. The first driving component includes at least one opening driving switch and at least one closing driving switch, and the second driving component includes at least one opening driving switch and at least one closing driving switch.

5. The disconnecting switch system according to claim 1 or 2, characterized in that, The driving device includes a first driving component and a second driving component. The first driving component includes at least one opening driving switch and at least one closing driving switch, and the second driving component includes at least one opening driving switch.

6. The disconnecting switch system according to claim 1 or 2, characterized in that, The disconnecting switch device further includes an energy storage motor and / or a status feedback component, wherein the energy storage motor is connected to the tripping coil and the status feedback component is connected to the drive device.

7. An energy storage valve submodule, characterized in that, The device includes a power module, an energy storage module, and a disconnecting switch system as described in any one of claims 1-6, wherein the two ends of the tripping switch of the disconnecting switch device are respectively connected to the power module and the energy storage module.

8. The energy storage valve submodule according to claim 7, characterized in that, The control device of the disconnecting switch system includes an energy storage module controller and a power module controller, which are respectively connected to the drive device.

9. The energy storage valve submodule according to claim 7, characterized in that, At least one of the tripping coils of the disconnecting switch system is connected to the main bus power supply through the main power supply switch, and at least one of the tripping coils is connected to the redundant bus power supply through the redundant power supply switch. The closing coil of the disconnecting switch system is connected to the main bus power supply via the main power supply switch, and / or the closing coil is connected to the redundant bus power supply via the redundant power supply switch.

10. The energy storage valve submodule according to claim 9, characterized in that, The main bus power supply draws power from the main bus between the disconnecting switch device and the energy storage module, and / or the redundant bus power supply draws power from the main bus between the disconnecting switch device and the energy storage module of an adjacent disconnecting switch system.

11. The energy storage valve submodule according to claim 7, characterized in that, The drive device is also used to monitor the operating status of the power module in real time, and determine that the tripping condition is met when the power module triggers a bypass.

12. An energy storage system, characterized in that, It includes a converter valve and an energy storage valve submodule as described in any one of claims 7-11.

Images