Isolating switch system, energy storage valve sub-module, and energy storage system

Abstract

The present application relates to an isolating switch system, an energy storage valve sub-module, and an energy storage system. An isolating switch device is provided with an opening switch and two or more opening coils for executing an opening function. The opening switch is connected to a first target isolating part and a second target isolating part, respectively; and the opening coils are respectively connected to a driving device. When the driving device detects that an opening condition is met, the driving device operates to connect the opening coils to a power supply, i.e., to control the opening coils to be powered on. In this case, an opening coil in a normal state is powered on, and when at least one opening coil implements successful opening and causes the opening switch to operate, the first target isolating part is disconnected from the second target isolating part.

Description

Isolating switch system, energy storage valve submodule and energy storage system

[0001] Cross-references

[0002] This application refers to Chinese patent application No. 202311167791.2 filed on September 11, 2023, entitled “Isolating switch system, energy storage valve submodule and energy storage system”, which is incorporated into this application in its entirety by reference. Technical Field

[0003] The present application relates to the field of energy storage safety technology, and in particular to an isolating switch system, an energy storage valve submodule, and an energy storage system. Background Art

[0004] With the development of the power grid, energy storage technology has become a crucial component. Among various energy storage technologies, high-voltage direct-mounted energy storage integrates VSC (voltage source converter) valves with energy storage valves. This technology offers advantages such as high modularity, low grid losses, good economic benefits, and high operational reliability. Disconnectors are widely used in energy storage systems using this technology and are crucial for their reliable operation.

[0005] However, in the related art, when the isolating switch needs to be opened to achieve electrical isolation, the isolating switch is prone to opening failure, and the opening reliability of the isolating switch is poor.

[0006] Application Contents

[0007] Based on this, it is necessary to provide an isolating switch system, an energy storage valve submodule and an energy storage system to reduce the possibility of failure in opening the isolating switch and improve the opening reliability of the isolating switch.

[0008] A disconnector system comprises: an disconnector device and a drive device, wherein the disconnector device comprises two or more opening coils, each opening coil drives the same opening switch; and the drive device is connected to the opening coils respectively.

[0009] In the above-mentioned disconnector system, the disconnector device is provided with a disconnect switch, two or more disconnect coils that perform the disconnect function, and the disconnect switches are respectively used to connect the first target isolation component and the second target isolation component. When the driving device detects that the disconnect conditions are met, the driving device operates to control each disconnect coil to be energized. At this time, the disconnect coil in a normal state is energized and performs the disconnect action. After at least one disconnect coil is energized, the disconnect switch is driven to disconnect the connection between the first target isolation component and the second target isolation component, that is, to electrically isolate the first target isolation component from the second target isolation component. Through this solution, the disconnector device is provided with multiple disconnect coils. Even if some of the disconnect coils fail, it will not affect the electrical isolation of the first target isolation component and the second target isolation component, and has higher disconnect reliability.

[0010] In some embodiments, the isolating switch device further includes a closing switch and a closing coil, the closing coil is connected to the driving device, and the closing coil is used to drive the closing switch.

[0011] In the above scheme, the isolating switch device also includes a closing coil and a closing switch. The closing coil drives the closing of the closing switch to conduct the connection between the first target isolation component and the second target isolation component, thereby achieving a reliable connection between the first target isolation component and the second target isolation component and improving the operating reliability of the isolating switch device.

[0012] In some embodiments, the number of the closing coils includes one or more, and the closing coils drive the same closing switch.

[0013] In this way, a single closing coil is provided to implement the closing function, effectively reducing the circuit volume and cost of the disconnector system. Alternatively, multiple closing coils can be provided to achieve closing even if some closing coils fail, connecting the first target isolation component and the second target isolation component, thus achieving high closing reliability.

[0014] In some embodiments, the drive device includes a drive assembly, which includes at least two opening drive switches and at least one closing drive switch, the opening drive switch is connected to the opening coil, and the closing drive switch is connected to the closing coil.

[0015] In the above solution, the drive device includes a drive component, and the same drive component is provided with at least one closing drive switch and at least two opening drive switches. Different opening coils are driven by the same drive component, which can effectively reduce the volume of the drive device and save hardware costs.

[0016] In some embodiments, the drive device includes a first drive component and a second drive component, the first drive component includes at least one opening drive switch and at least one closing drive switch, the second drive component includes at least one opening drive switch and at least one closing drive switch, the opening drive switch is connected to the opening coil, and the closing drive switch is connected to the closing coil.

[0017] In this solution, the drive device includes a first drive assembly and a second drive assembly. Different opening coils can be driven by different drive assemblies to open, and different closing coils can be driven by different drive assemblies to close. If a drive assembly fails, the other drive assembly can still be used to drive the opening and closing of the disconnector, further improving the operational reliability of the disconnector system.

[0018] In some embodiments, the drive device includes a first drive component and a second drive component, the first drive component includes at least one opening drive switch and at least one closing drive switch, the second drive component includes at least one opening drive switch, the opening drive switch is connected to the opening coil, and the closing drive switch is connected to the closing coil.

[0019] In the above scheme, the driving device includes a first driving component and a second driving component. Different opening coils can achieve opening drive through different driving components. When there is a drive component failure, the opening drive can still be performed through another drive component, effectively improving the reliability of the opening drive.

[0020] In some embodiments, the isolating switch system further includes a main power supply switch and a redundant power supply switch, at least one tripping coil is connected to the main power supply switch, and at least one tripping coil 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 different power sources.

[0021] In the above solution, the tripping coil can be connected to different power sources through the main power supply switch and the redundant power supply switch respectively, so as to realize redundant power supply of the tripping coil. In the event of a power failure, the tripping coil connected to a different power source can still drive the tripping, effectively improving the reliability of the tripping power supply.

[0022] In some embodiments, the isolating switch device further includes an energy storage motor and / or a state feedback component, the energy storage motor is connected to the trip coil, and the state feedback component is connected to the drive device.

[0023] The above solution provides an energy storage motor and / or a state feedback component in the isolating switch device, which can achieve more reliable closing and opening drive, as well as opening and closing state feedback, and effectively improve the operational reliability of the isolating switch system.

[0024] In some embodiments, the disconnector system further includes a control device connected to the drive device.

[0025] In the above solution, the disconnector system also includes a control device, an over-control device and a drive device, which cooperate to realize the energization and de-energization control of the opening coil and the energization and de-energization control of the closing coil, which can effectively alleviate the control pressure of a single device and improve the control reliability of opening and closing.

[0026] The present application also provides an energy storage valve submodule, comprising a power module, an energy storage module and the above-mentioned isolating switch system, wherein the two ends of the opening switch of the isolating switch device are respectively connected to the power module and the energy storage module.

[0027] In some embodiments, the control device of the isolating switch system includes an energy storage module controller and a power module controller, and the energy storage module controller and the power module controller are respectively connected to the driving device.

[0028] In the above scheme, the control device includes an energy storage module controller and a power module controller, and the trip signal is sent through the energy storage module controller and the power module controller. When any one of the energy storage module controller and the power module controller fails, the sending of the trip signal is not affected, thereby effectively improving the sending reliability of the trip signal.

[0029] In some embodiments, at least one opening coil of the isolating switch system is connected to the main bus power supply through the main power supply switch, and at least one opening coil is connected to the redundant bus power supply through the redundant power supply switch; the closing coil of the isolating switch system is connected to the main bus power supply through the main power supply switch, and / or the closing coil is connected to the redundant bus power supply through the redundant power supply switch.

[0030] In the above scheme, the opening coil or closing coil 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 opening or closing process, further improving the reliability of opening and closing.

[0031] In some embodiments, the main bus power supply draws energy from the main bus between the isolating switch device and the energy storage module, and / or the redundant bus power supply draws energy from the main bus between the isolating switch device and the energy storage module of an adjacent isolating switch system.

[0032] In the above scheme, the main bus power supply draws energy from the main bus between the energy storage module connected to the current disconnector system and the disconnector device, or the redundant bus power supply draws energy from the main bus between the energy storage module connected to the adjacent disconnector system and the disconnector device, which has a high energy acquisition convenience.

[0033] The present application also provides an energy storage system, including a converter valve and an energy storage valve, wherein the energy storage valve includes a cascade structure of the above-mentioned energy storage valve submodules. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on the drawings without inventive work. In the drawings:

[0035] FIG1 is a schematic diagram of the structure of an isolating switch system in some embodiments of the present application;

[0036] FIG2 is a schematic diagram of the structure of an isolating switch system in some other embodiments of the present application;

[0037] FIG3 is a schematic diagram of signal trends in an isolating switch system in some embodiments of the present application;

[0038] FIG4 is a schematic diagram of signal trends of an isolating switch system in some other embodiments of the present application;

[0039] FIG5 is a schematic diagram of signal trends of an isolating switch system in some other embodiments of the present application;

[0040] FIG6 is a schematic diagram of the electrical structure of an isolating switch device in some embodiments of the present application;

[0041] FIG7 is a schematic diagram of signal trends of an isolating switch system in some further embodiments of the present application;

[0042] FIG8 is a schematic diagram of signal trends of an isolating switch system in some other embodiments of the present application;

[0043] FIG9 is a schematic diagram of signal trends in an isolating switch system in some other embodiments of the present application.

[0044] Figure numerals: disconnecting switch device-112, drive device-114, opening coil-116; closing coil-212, drive component-414, opening drive switch-612, closing drive switch-614; first drive component-4142, second drive component-4144, main power supply switch-K1, redundant power supply switch-K2; control device-412; power module controller-512, energy storage module controller-514; energy storage motor-610, state feedback component-620. DETAILED DESCRIPTION

[0045] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0047] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0048] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0050] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0051] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0052] Currently, market trends indicate that energy storage systems are becoming increasingly widespread, significantly improving electricity usage in daily production and life. High-voltage direct-mounted energy storage, with its highly modular structure, is able to meet the demands for high efficiency, reliability, economy, and safety, and is therefore gaining increasing adoption.

[0053] The high-voltage direct-hook type energy storage system integrates the voltage source converter valve (also known as the VSC converter valve) and the energy storage valve, and the energy storage valve includes multiple cascaded energy storage valve sub-modules. In actual energy storage scenarios, isolating switches are used in different parts of the energy storage system. In more detail, each energy storage valve sub-module is generally provided with an isolating switch between the energy storage module and the power module as an example for explanation. When some energy storage valve sub-modules need to be bypassed due to faults or other reasons, it is not only necessary to bypass the corresponding energy storage valve sub-module through the bypass switch of the power module, but also necessary to control the isolating switch to open, so that the energy storage module and the power module are reliably electrically isolated, thereby 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 a trip signal to the isolating switch, the isolating switch often fails to open, seriously affecting the operational safety of the energy storage valve sub-module.

[0054] In order to improve the opening reliability of the isolating switch, the power module and the energy storage module can be reliably electrically isolated when the energy storage valve submodule is bypassed, thereby improving the operational safety of the energy storage valve submodule. Through research, it was found that the failure of the isolating switch to open is often due to a failure of the device related to the opening control, such as a failure of the opening coil, which makes the opening coil unable to reliably drive the corresponding opening switch to open. Based on this, a redundant setting can be made for the opening control of the isolating switch, through at least two sets of opening-related devices, which simultaneously perform the opening action under the action of the opening signal. In this way, only at least one set of opening-related devices needs to operate successfully to put the energy storage module and the power module into an electrically isolated state, thereby improving the opening reliability of the isolating switch.

[0055] Based on the above considerations, the technical solution of the embodiments of the present application provides an isolating switch system, wherein the isolating switch device is provided with two or more tripping coils, each of which is connected to a driving device. The driving device drives the connection between the tripping coil and the power supply, that is, the power is supplied or removed. Therefore, when the tripping conditions are met, the driving device can connect the tripping coil to the power supply, energizing the tripping coil, driving the corresponding tripping switch to perform the corresponding tripping operation, and ultimately disconnecting the energy storage module from the power module.

[0056] In this embodiment, the power supply and de-power supply of the tripping coils are controlled by a drive device. When the tripping conditions are met, the drive device activates. Even if some tripping coils fail, the tripping coils in normal operation will still be powered by the drive device, thereby achieving the tripping function. In other words, even if there are tripping coils in normal operation, the tripping function can be achieved based on the tripping signal, providing high tripping reliability.

[0057] The solution of the embodiments of the present application can be applied to any electronic device that requires the opening of an isolating switch to achieve electrical isolation. Specifically, the isolating switch is connected to a first target isolation component and a second target isolation component that require electrical isolation. When opening is required, the driving device is activated to connect the opening coil of the isolating switch device to the power supply, so that the opening coil meets the opening conditions, thereby executing the opening action. Ultimately, if at least one of the opening coils successfully opens, electrical isolation is achieved between the first target isolation component and the second target isolation component.

[0058] In more detail, in some embodiments, the isolating switch system can be used in energy storage scenarios, and the isolating switch is set between any two energy storage system components that require electrical isolation. By opening the isolating switch, reliable electrical isolation between the energy storage system components can be achieved.

[0059] In some embodiments, the isolating 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 driving device is actuated to eventually make at least one tripping coil successfully tripped, thereby electrically isolating the power module and the energy storage module.

[0060] To facilitate understanding of the technical solution of the present application, it can be understood below that the isolating switch system is applied to 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.

[0061] Please refer to Figure 1. An embodiment of the present application provides an isolating switch system, including: an isolating switch device 112 and a driving device 114. The isolating switch device 112 includes a trip switch (not shown) and two or more trip coils 116. Each trip coil 116 drives the same trip switch, and the driving devices 114 are respectively connected to the trip coils 116.

[0062] Specifically, the tripping coil 116 is connected to the first target isolation component and the second target isolation component respectively. The first target isolation component is one of the target components that needs to be electrically isolated from other components through the isolating switch device. The first target isolation component is another target component that needs to be electrically isolated from other components through the isolating switch device. The isolating switch device 112 is a switching device used to achieve electrical isolation between the first target isolation component and the second target isolation component. The tripping coil 116 is a functional component in the isolating switch device 112 for realizing tripping drive. The driving device 114 is a device used to drive the tripping coil 116 to be on and off (that is, to be energized or de-energized) with the power supply.

[0063] Each tripping coil 116 in the disconnector device 112 is connected to a power source. When driven by the driver 114, the connection between the tripping coil 116 and the power source is disconnected. At this point, the tripping coil 116 loses power, and the tripping switch does not operate, thus failing to perform the tripping function. However, when driven by the driver 114, the connection between the tripping coil 116 and the power source is restored, and the tripping coil 116 receives power, driving the tripping switch to operate and perform the tripping function.

[0064] It can be understood that there is not only one way to determine whether the isolating switch system meets the tripping conditions. In some embodiments, when the isolating switch system needs to be tripped, the user or the upper control device sends a tripping instruction to the isolating switch system. After the driving device 114 receives the tripping instruction, it controls the connection between the tripping coil 116 and the power supply, and realizes the tripping function through the tripping switch action.

[0065] In another embodiment, taking the application in the energy storage valve submodule as an example, the driving device 114 may monitor the operating status of the power module in real time. If it is detected that the power module triggers the bypass, it is considered that the tripping condition is met.

[0066] It should be pointed out that the number of tripping coils 116 provided in the disconnector is not unique. In a more detailed embodiment, two tripping coils 116 may be provided, and the two tripping coils 116 are respectively connected to the drive device 114 and the power supply, and the two tripping coils 116 drive one tripping switch at the same time. When the tripping conditions are met, the drive device 114 is actuated, and at the same time, the connection between the two tripping coils 116 and the power supply is turned on. As long as any one of the tripping coils 116 is energized normally, the tripping switch can be driven to operate, thereby completing the electrical isolation between the first target isolation component and the second target isolation component. In this way, even if one of the tripping coils 116 fails, the first target isolation component and the second target isolation component can still be electrically isolated. While improving the tripping reliability of the disconnector, the circuit volume of the disconnector system can also be effectively reduced, saving circuit costs.

[0067] In another embodiment, to further improve the disconnect reliability of the isolating switch, three or more tripping coils 116 may be provided. When the tripping conditions are met, the drive device 114 simultaneously connects each of the tripping coils 116 to the power source. In this case, only the normal energization of any one of the tripping coils 116 is required to electrically isolate the first target isolation component from the second target isolation component. In this isolating switch system, the tripping function can still be achieved even if two or more isolating switch components fail, thus achieving higher trip reliability.

[0068] In the above-mentioned disconnector system, the disconnector device 112 is provided with a disconnect switch and two or more disconnect coils 116 that perform the disconnect function. The disconnect switch is respectively connected to the first target isolation component and the second target isolation component, and each disconnect coil 116 is respectively connected to the driving device 114. When the driving device 114 detects that the disconnect conditions are met, the driving device 114 is actuated to connect each disconnect coil 116 with the power supply. At this time, the disconnect coil 116 in a normal state is energized, and after at least one disconnect coil 116 is energized to drive the disconnect switch to operate, the connection between the first target isolation component and the second target isolation component is disconnected, that is, the first target isolation component and the second target isolation component are electrically isolated. Through this solution, the disconnector device 112 is provided with multiple disconnect coils 116. Even if some of the disconnect coils 116 fail, it will not affect the electrical isolation of the first target isolation component and the second target isolation component, and has higher disconnection reliability.

[0069] Please refer to FIG. 2 . In some embodiments, the isolating switch device 112 further includes a closing coil 212 and a closing switch (not shown). The closing coil 212 is connected to the driving device 114 and is used to drive the closing switch.

[0070] Specifically, the closing coil 212 is a functional device that, when energized, closes the connection between the first and second target isolation components. In this embodiment, the isolation switch device 112 is further provided with a closing coil 212. The closing switches are connected to the first and second target isolation components, respectively. The closing coil 212 is also connected to the drive device 114. Therefore, when the drive device 114 activates the closing coil 212, it drives the closing switches to close the circuit, thereby closing the connection between the first and second target isolation components.

[0071] In the above solution, the isolating switch device 112 also includes a closing switch and a closing coil 212. The closing switch is driven to close by the closing coil 212, thereby conducting the connection between the first target isolation component and the second target isolation component, thereby achieving a reliable connection between the first target isolation component and the second target isolation component, and improving the operating reliability of the isolating switch device 112.

[0072] It should be noted that the number of closing coils 212 provided in the disconnector device 112 is not unique. In some embodiments, the number of closing coils 212 includes one or more, and each closing coil 212 drives the same closing switch. In other words, in some embodiments, the number of closing coils 212 can be set to one. In this case, the disconnector device 112 has a redundant opening function, and when closing is required, it is achieved through a single closing coil 212. In this way, providing a single closing coil 212 to implement the closing function can effectively reduce the circuit volume of the disconnector system and lower costs.

[0073] In other embodiments, the closing coil 212 can be redundantly configured, with multiple closing coils 212 installed in the same disconnector system. Similar to the opening operation of the opening coil 116 described above, when closing conditions are met, the drive device 114 connects the closing coil 212 to the power source. When at least one closing coil 212 is energized, the closing switch is actuated, establishing a connection between the first and second target isolation components. This approach allows for closing even if some closing coils 212 fail, ensuring a high degree of closing reliability.

[0074] Please refer to Figure 3. In some embodiments, the driving device 114 includes a driving component 414. The driving component 414 includes at least two opening driving switches 612 and at least one closing driving switch 614. The opening driving switch 612 is connected to the opening coil 116, and the closing driving switch 614 is connected to the closing coil 212.

[0075] Specifically, the drive assembly 414 is a functional component used to implement the opening and closing drive functions. In this embodiment, the drive device includes a drive assembly 414. This drive assembly 414 is equipped with at least two opening drive switches 612 and at least one closing drive switch 614. All opening coils 116 and closing coils 212 are driven by the same drive assembly 414.

[0076] It is understood that the specific types of opening drive switch 612 and closing drive switch 614 are not limited to a single type. Any switch device that can connect the opening coil 116 to the power supply, or connect the closing coil 212 to the power supply, in response to an opening signal or a closing signal, can be used. For example, in a more detailed embodiment, opening drive switch 612 and closing drive switch 614 both include relays. After receiving the opening signal, the relays activate their own contacts to connect the opening coil 116 to the power supply, or connect the closing coil 212 to the power supply.

[0077] It should be noted that in a more detailed embodiment, the drive assembly 414 also includes an isolating switch drive board, which is a printed circuit board. The opening drive switch 612 and the closing drive switch 614 are integrated on the isolating switch drive board, and the internal wiring of the drive assembly 414 is routed on the isolating switch drive board. In this way, the drive assembly 414 can be modularized. When the drive assembly 414 needs to be replaced, the isolating switch drive board can be directly replaced, effectively improving the maintenance convenience of the isolating switch system.

[0078] In the above solution, the driving device 114 includes a driving component 414. The same driving component 414 is provided with at least one closing driving switch 614 and at least two opening driving switches 612. Different opening coils 116 are driven by the same driving component 414 to realize opening driving, which can effectively reduce the volume of the driving device 114 and save hardware costs.

[0079] Please refer to Figure 4. In 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 opening drive switch 612 and at least one closing drive switch 614. The second drive component 4144 includes at least one opening drive switch 612. The opening drive switch 612 is connected to the opening coil 116, and the closing drive switch 614 is connected to the closing coil 212.

[0080] Specifically, in this embodiment, the drive device 114 includes two drive assemblies. The first drive assembly 4142 includes at least one opening drive switch 612 and at least one closing drive switch 614, which are used to implement opening and closing drive control. The second drive assembly 4144 includes only the opening drive switch 612, which is used to implement opening drive control. Both the first drive assembly 4142 and the second drive assembly 4144 include an isolating switch drive board that integrates the opening drive switch 612 and routing.

[0081] Through the solution of this embodiment, the isolating switch driving board used to integrate the opening drive switch 612 and the closing drive switch 614 is redundantly set, at least one opening drive switch 612 is set on the isolating switch driving board corresponding to the first drive component 4142, and at least one opening drive switch 612 is set on the isolating switch driving board corresponding to the second drive component 4144. In the event of a fault in the isolating switch driving board or the wiring of the first drive component 4142, the operation of the opening drive switch 612 in the second drive component 4144 will not be affected.

[0082] In the above solution, the driving device 114 includes a first driving component 4142 and a second driving component 4144. Different opening coils 116 can be driven by different driving components. When a driving component fails, the opening drive can still be performed by another driving component, thereby effectively improving the reliability of the opening drive.

[0083] In some embodiments, please refer to 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 opening drive switch 612 and at least one closing drive switch 614, the second drive component 4144 includes at least one opening drive switch 612 and at least one closing drive switch 614, the opening drive switch 612 is connected to the opening coil 116, and the closing drive switch 614 is connected to the closing coil 212.

[0084] Specifically, the solution of this embodiment is similar to that of the above embodiment, both of which use different drive components to achieve opening drive. The difference is that the solution of this embodiment also performs redundant settings on the closing coil 212, and different closing coils are driven by different closing drive components.

[0085] In the above solution, the drive device 114 includes a first drive assembly 4142 and a second drive assembly 4144. Different opening coils 116 can be driven by different drive assemblies to open, and different closing coils can be driven by different drive assemblies to close. If a drive assembly fails, the other drive assembly can still be used to drive the opening and closing of the disconnector, further improving the operational reliability of the disconnector system.

[0086] Please refer to Figures 3 to 5. In some embodiments, the isolation switch system also includes a main power supply switch K1 and a redundant power supply switch K2. At least one tripping coil 116 is connected to the main power supply switch K1, and at least one tripping coil 116 is 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 sources.

[0087] Specifically, in this embodiment, different tripping coils 116 obtain power from different power sources. When the main power switch K1 is on, the power source connected to the main power switch K1 can transmit power to the portion of the tripping coils 116 connected to the main power switch K1 to drive the tripping. When the redundant power switch K2 is on, the power source connected to the redundant power switch K2 can transmit power to the portion of the tripping coils 116 connected to the redundant power switch K2 to drive the tripping.

[0088] In the above solution, the tripping coil 116 can be connected to different power sources through the main power supply switch K1 and the redundant power supply switch K2, respectively, to achieve redundant power supply for the tripping coil 116. In the event of a power failure, the tripping coil 116 connected to a different power source can still drive the tripping, effectively improving the reliability of the tripping power supply.

[0089] In some embodiments, referring to FIG6 , the isolating switch device 112 further includes an energy storage motor 610 and / or a state feedback component 620 . The energy storage motor 610 is connected to the trip coil 116 , and the state feedback component 620 is connected to the drive device 114 (not shown).

[0090] Specifically, in the solution of this embodiment, the isolating switch device 112 is a switch device of the double opening coil and single closing coil type, wherein one opening coil 116 is connected to the power supply through the connection point C1 and the connection point C2, the other opening coil 116 is connected to the power supply through the connection point C11 and the connection point C12, the closing coil 212 is connected to the power supply through the connection point A1 and the connection point A2, and the energy storage motor 610 is connected to the power supply through the connection point U1 and the connection point U2.

[0091] The energy storage motor 610 is a motor that converts electrical energy into mechanical energy and stores it. The energy storage motor 610 converts electrical energy into mechanical energy and stores it based on the principle of electromagnetic induction, and releases it when needed. In the disconnector, when the trip coil is energized, the energy storage motor 610 can drive the energy storage mechanism to compress the spring of the trip mechanism, so that the trip mechanism spring generates a certain amount of compression energy, and the trip control is achieved through the stretching of the spring. The state feedback component 620 is a device used to monitor the operating status of the disconnector device 112 and feed it back to the drive device 114. Specifically, in actual application scenarios, the state feedback component 620 first feeds back the opening and closing status of the disconnector device 112 to the drive component 414 in the form of an electrical signal, which is then converted into an electrical signal by the drive component 414 and transmitted to the remote end to complete the state feedback.

[0092] In the above solution, the isolating switch device 112 is provided with an energy storage motor 610 and / or a state feedback component 620, which can achieve more reliable closing and opening drive, as well as opening and closing state feedback, and effectively improve the operating reliability of the isolating switch system.

[0093] Please refer to FIG. 7 . In some embodiments, the isolating switch system further includes a control device 412 . The control device 412 is connected to the driving device 114 .

[0094] Specifically, the drive device 114 is used to drive the connection and disconnection between the opening coil 116 and the power supply, or the connection and disconnection between 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 operation of the drive device 114 when closing is required, or when opening is required.

[0095] In this embodiment, the disconnector system includes a drive device 114 and a control device 412. The control device 412 can communicate with other control components to obtain the desired disconnector operating status. Upon receiving an opening signal or monitoring that the opening condition is satisfied, the control device 412 sends an opening control signal to the drive device 114, causing the drive device 114 to connect the opening coil 116 to the power supply. Furthermore, upon receiving a closing signal or monitoring that the closing condition is satisfied, the control device 412 sends a closing control signal to the drive device 114, causing the drive device 114 to connect the closing coil 212 to the power supply.

[0096] In more detail, in some embodiments, the driving device 114 and the control device 412 are connected via an optical fiber, and the tripping signal output by the control device 412 is transmitted to the driving device 114 in the form of an optical signal, and the photoelectric signal conversion is performed inside the driving device 114, and finally the power-on and power-off control of the tripping coil 116 or the closing coil 212 is performed.

[0097] The above scheme, through the control device 412 and the drive device 114, cooperates to realize the energization and de-energization control of the opening coil 116 and the energization and de-energization control of the closing coil 212, which can effectively alleviate the control pressure of a single device and improve the control reliability of opening and closing.

[0098] Some embodiments of the present application further provide an energy storage valve submodule, comprising a power module, an energy storage module and the above-mentioned isolating switch system, wherein the two ends of the opening switch of the isolating switch device are respectively connected to the power module and the energy storage module.

[0099] Specifically, the isolating switch system is as shown in the above-mentioned embodiments and the accompanying drawings. In this embodiment, the isolating switch device 112 of the isolating switch system is connected 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 busbar. The isolating switch device 112 is arranged on the main busbar between the power module and the energy storage module. The isolating switch device 112 divides the main busbar into a main busbar between the power module and the isolating switch device 112, and a main busbar between the isolating switch device 112 and the energy storage module. Specifically, the two ends of the disconnector of the isolating switch device 112 are connected to the power module and the energy storage module respectively via the main busbar.

[0100] In this solution, the isolating switch device 112 is provided with more than two opening coils 116 that perform the opening function, the opening switch connects the power module and the energy storage module, and each opening coil 116 is respectively connected to the driving device 114. When the driving device 114 detects that the opening conditions are met, the driving device 114 is actuated to connect each opening coil 116 with the power supply. At this time, the opening coil 116 in a normal state is energized, and after at least one opening coil 116 is energized to drive the opening switch to operate, the connection between the power module and the energy storage module is disconnected, that is, the power module and the energy storage module are electrically isolated. Through this solution, the isolating switch device 112 is provided with multiple opening coils 116. Even if some of the opening coils 116 fail, it will not affect the electrical isolation of the power module and the energy storage module, and has higher opening reliability.

[0101] In some embodiments, referring to FIG. 8 or FIG. 9 , the control device 412 of the isolation switch system includes an energy storage module controller 514 and a power module controller 512 , and the energy storage module controller 514 and the power module controller 512 are respectively connected to the driving device 114 .

[0102] Specifically, this embodiment uses the isolating switch system as an example for use in an energy storage system. Specifically, the isolating switch system is used 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 control device in the energy storage valve submodule that controls the operation of the energy storage module. The power module controller 512 is the main controller of the energy storage valve submodule and can be used to control the operation of the power module or exchange information with the energy storage module controller 514.

[0103] In the solution of this embodiment, the control of the drive device 114 is achieved through 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 need for opening, the energy storage module controller 514 and the power module controller 512 can simultaneously send opening signals to the drive device 114. When the drive device 114 receives any one of the opening signals, it can start to perform the opening action.

[0104] Similarly, in some embodiments, 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 start executing the closing action.

[0105] It is understandable that in another embodiment, the closing signal may be sent by any one of the energy storage module controller 514 and the power module controller 512, and the driving device 114 starts to execute the closing action when it receives the closing signal sent by the energy storage module controller 514 or the closing signal sent by the power module controller 512.

[0106] In the above solution, taking the application of the isolating switch system in the energy storage valve submodule as an example, the control device 412 includes an energy storage module controller 514 and a power module controller 512. The trip signal is sent through the energy storage module controller 514 and the power module controller 512. When any one of the energy storage module controller 514 and the power module controller 512 fails, the sending of the trip signal is not affected, thereby effectively improving the reliability of the sending of the trip signal.

[0107] In some embodiments, the power supply includes a main bus power supply and a redundant bus power supply. At least one opening coil 116 of the isolation switch system is connected to the main bus power supply through the main power supply switch K1, and at least one opening coil 116 is connected to the redundant bus power supply through the 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.

[0108] Specifically, the main bus power supply is a device that draws energy from the main bus to provide electrical energy to the opening coil 116 or the closing coil 212. The redundant bus power supply is a device that draws energy from the redundant bus to provide electrical energy to the opening coil 116 or the closing coil 212. In the solution of this embodiment, in order to further improve the reliability of the opening, the opening coil 116 is connected to different power sources. Specifically, some of the opening coils 116 are connected to the main bus power supply through the main power supply switch K1, and some of the opening 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 of the opening coils 116 can continue to draw energy from the redundant bus power supply to achieve the opening function.

[0109] The closing coil 212 needs to be connected to a power source based on actual conditions. If there is only one closing coil 212, it can draw power from either the main bus power source or the redundant bus power source, without specific limitations. If there are two or more closing coils 212, each closing coil 212 can draw power from both the main bus power source and the redundant bus power source. In other embodiments, similar to the opening coil 116, some closing coils 212 can draw power from the main bus power source, while others can draw power from the redundant bus power source, to improve the power supply reliability of the closing coils 212.

[0110] In the above solution, the opening 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 opening or closing operation, further improving the opening and closing reliability.

[0111] In some embodiments, the main bus power source draws energy from the main bus between the isolation switch device and the second target isolation component.

[0112] And / or, in some embodiments, the redundant bus power source draws energy from the main bus between the isolating switch device of the adjacent isolating switch system and the second target isolating component.

[0113] Specifically, in the solution of the above embodiment, the first target isolation component and the second target isolation component are connected through the main bus, the isolating switch device is arranged on the main bus, the main bus power supply is connected to the main bus between the isolating switch device and the second target isolation component, and electric energy is obtained from the main bus, which is then converted and stored to obtain electric energy suitable for the operation of the opening coil 116 and the closing coil 212. In actual application scenarios, the number of first target isolation components and second target isolation components is not unique, and each group of first target isolation components and second target isolation components needs to be electrically isolated by the isolating switch system. Therefore, the redundant bus power supply can be connected between the first target isolation component and the second target isolation component of other groups, and power is obtained through the main bus between the first target isolation component and the second target isolation component of other groups, and then converted and stored as a redundant bus power supply.

[0114] It is understandable that in other embodiments, the redundant bus power supply may also obtain energy from other power sources, such as an independently provided power supply device, etc. There is no specific limitation and the selection may be made based on actual needs.

[0115] For a more detailed explanation, consider the case of an isolating switch system used in an energy storage valve submodule. In this case, the main busbar power supply draws power from the main busbar (also known as the battery busbar) between the isolating switch device and the energy storage module within the energy storage valve submodule to which the current isolating switch system belongs, while the redundant busbar power supply draws power from the main busbar between the isolating switch device and the energy storage module of other energy storage valve submodules. Specifically, to reduce power lines and mitigate energy sourcing risks, the redundant busbar power supply can draw power from the main busbar of an adjacent energy storage valve submodule.

[0116] Through this energy acquisition method, even if the disconnector device is opened under the action of the driving device and the connection between the power module and the energy storage module is disconnected, the disconnector device can still continue to obtain electrical energy from the energy storage module through the main bus between the disconnector device and the energy storage module, thereby maintaining the opening function and improving the opening reliability.

[0117] In the above scheme, the main bus power supply draws energy from the main bus between the first target isolation component and the second target isolation component connected to the current isolation switch system, or the redundant bus power supply module draws energy from the main bus between the first target isolation component and the second target isolation component connected to the adjacent isolation switch system, which has a high energy acquisition convenience.

[0118] In order to facilitate understanding of the technical solution of the present application, the present application is explained below in conjunction with more detailed embodiments.

[0119] Please refer to FIG8 . In this embodiment, the isolating switch system is applied to the energy storage valve submodule. The first target isolation component and the second target isolation component are respectively a power module and an energy storage module. The isolating switch system includes a drive device 114 and a control device 412. In some embodiments, 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. The second drive assembly 4144 also includes at least one opening drive switch 612 and at least one closing drive switch 614. Correspondingly, the isolating switch device 112 is provided 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. The closing drive switch 614 and the opening drive switch 612 are both relays.

[0120] Each opening drive switch 612 and closing drive switch 614 in the first drive assembly 4142 is connected to the energy storage module controller 514, and each opening drive switch 612 and closing drive switch 614 in the second drive assembly 4144 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.

[0121] In some embodiments, some of the opening coils 116 are connected to the main bus power supply via the main power switch K1, which draws power from the main bus of the current energy storage valve submodule (specifically, the main bus connected to the main bus between the isolating switch device 112 and the energy storage module). Some of the opening coils 116 are connected to the redundant bus power supply via the redundant power switch K2, which 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). Furthermore, some of the closing coils 212 are connected to the main bus power supply via the main power switch K1, while some of the closing coils 212 are connected to the redundant bus power supply via the redundant power switch K2.

[0122] When the tripping conditions are met, the energy storage module controller 514 sends a tripping signal to each tripping drive switch 612 in the first drive assembly 4142, and the power module controller 512 sends a tripping signal to each tripping drive switch 612 in the second drive assembly 4144. Each tripping drive switch 612 then activates, connecting the corresponding tripping coil 116 to the power source. After at least one tripping coil 116 is energized, causing the tripping switch to activate, the connection between the power module and the energy storage module is disconnected, achieving electrical isolation.

[0123] When the closing conditions are met, the energy storage module controller 514 sends a closing signal to each closing drive switch 614 in the first drive assembly 4142, and the power module controller 512 sends a closing signal to each closing drive switch 614 in the second drive assembly 4144. Each closing drive switch 614 then activates, connecting the corresponding closing coil 212 to the power source. After at least one closing coil 212 is energized, causing the closing switch to activate, the connection between the power module and the energy storage module is established, closing the isolating switch.

[0124] In some embodiments of the present application, an energy storage system is further provided, comprising a converter valve and the above-mentioned energy storage valve submodule.

[0125] Specifically, the energy storage valve submodule is as shown in the above embodiments and accompanying drawings. In actual use scenarios, the energy storage valve submodules can be cascaded to form an energy storage valve. This solution further applies the energy storage valve submodule to the energy storage system. The isolating switch device 112 is equipped with two or more tripping coils 116 that perform the tripping function. The tripping switches are connected to the power module and the energy storage module, respectively. Each tripping coil 116 is connected to a power source via a driver 114. When the driver 114 detects that the tripping conditions are met, it activates, connecting each tripping coil 116 to the power source. At this point, the normal tripping coils 116 are energized and perform the tripping operation. After at least one tripping coil 116 successfully trips, the connection between the power module and the energy storage module is disconnected, thereby electrically isolating the power module from the energy storage module. With this solution, the isolating 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, thus ensuring high tripping reliability.

[0126] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An isolating switch system, comprising: An isolating switch device, the isolating switch device comprising an opening switch and two or more opening coils, each of the opening coils driving the same opening switch; as well as A driving device is connected to the opening coils respectively.

2. The isolating switch system according to claim 1, wherein: The isolating switch device further comprises 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.

3. The isolating switch system according to claim 2, wherein: The number of the closing coils includes one or more, and the closing coils drive the same closing switch.

4. The isolating switch system according to any one of claims 2 to 3, wherein: The driving device comprises a driving component, and the driving component comprises at least two opening driving switches and at least one closing driving switch, the opening driving switch is connected to the opening coil, and the closing driving switch is connected to the closing coil.

5. The isolating switch system according to any one of claims 2 to 3, wherein: 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, the second driving component includes at least one opening driving switch and at least one closing driving switch, the opening driving switch is connected to the opening coil, and the closing driving switch is connected to the closing coil.

6. The isolating switch system according to any one of claims 2 to 3, wherein: 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, the second driving component includes at least one opening driving switch, the opening driving switch is connected to the opening coil, and the closing driving switch is connected to the closing coil.

7. The isolating switch system according to any one of claims 1 to 6, wherein: The isolating switch system also includes a main power supply switch and a redundant power supply switch. At least one of the opening coils is connected to the main power supply switch, and at least one of the opening coils is connected to the redundant power supply switch. The main power supply switch and the redundant power supply switch are respectively used to connect different power supplies.

8. The isolating switch system according to any one of claims 1 to 7, wherein: The isolating switch device further comprises an energy storage motor and / or a state feedback component, wherein the energy storage motor is connected to the opening coil, and the state feedback component is connected to the driving device.

9. The isolating switch system according to any one of claims 1 to 8, wherein: The isolating switch system further comprises a control device, wherein the control device is connected to the driving device.

10. An energy storage valve submodule, comprising a power module, an energy storage module and the isolating switch system according to any one of claims 1 to 9, wherein two ends of the opening switch of the isolating switch device are respectively connected to the power module and the energy storage module.

11. The energy storage valve submodule according to claim 10, wherein: The control device of the isolating switch system comprises an energy storage module controller and a power module controller, and the energy storage module controller and the power module controller are respectively connected to the driving device.

12. The energy storage valve submodule according to claim 10 or 11, wherein: At least one of the opening coils of the isolating switch system is connected to a main bus power supply via a main power supply switch, and at least one of the opening coils is connected to a redundant bus power supply via a redundant power supply switch; The closing coil of the isolating 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.

13. The energy storage valve submodule according to claim 12, wherein: The main bus power source obtains energy from the main bus between the isolating switch device and the energy storage module, and / or the redundant bus power source obtains energy from the main bus between the isolating switch device and the energy storage module of the adjacent isolating switch system.

14. An energy storage system, comprising a converter valve and the energy storage valve submodule according to any one of claims 10 to 13.

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