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

Abstract

The invention 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 more than two opening coils for executing an opening function, the opening switch is respectively connected with a first target isolating component and a second target isolating component, and each opening coil is respectively connected with a driving device. Under the condition that the driving device detects that the opening condition is met, the driving device acts, connection between each opening coil and the power supply is conducted, and the opening coils are controlled to be powered on. At the moment, the opening coil in the normal state is electrified, and after at least one opening coil is successfully opened to enable the opening switch to act, the connection between the first target isolation component and the second target isolation component is disconnected. According to the scheme, the isolating switch device is provided with a plurality of opening coils, even if part of the opening coils break down, electrical isolation of the first target isolating component and the second target isolating component cannot be affected, and the isolating switch device has high opening reliability.

Description

Technical Field

[0001] 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

[0002] With the development of the power grid, energy storage technology has become an important part of it. Among various energy storage technologies, high-voltage direct-mounted energy storage technology integrates the VSC (Voltage Source Converter) converter valve with the energy storage valve, and has the advantages of high modularity, low network loss, good economic benefits, and high operational reliability. In the energy storage system of high-voltage direct-mounted energy storage technology, the application of isolating switches is very extensive, which is of great significance to the reliable operation of the energy storage system.

[0003] 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, resulting in poor opening reliability of the isolating switch. Summary of the invention

[0004] 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 the opening of the isolating switch and improve the opening reliability of the isolating switch.

[0005] A disconnecting switch system comprises: an disconnecting switch device and a driving device, wherein the disconnecting switch device comprises two or more opening coils, each of which drives the same opening switch; and the driving device is connected to the opening coils respectively.

[0006] In the above-mentioned isolating switch system, the isolating switch device is provided with an opening switch, two or more opening coils that perform the opening function, and the opening switches are respectively connected to the first target isolation component and the second target isolation component. When the driving device detects that the opening conditions are met, the driving device operates to control each opening coil to be energized. At this time, the opening coil in a normal state is energized and performs the opening action. After at least one opening coil is energized, the opening switch is driven to operate 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 isolating switch device is provided with multiple opening coils. Even if some of the opening coils fail, it will not affect the electrical isolation of the first target isolation component and the second target isolation component, and has a higher opening reliability.

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

[0008] 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.

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

[0010] In this way, a closing coil is provided to realize the closing function, which can effectively reduce the circuit volume of the isolating switch system and reduce the cost. Alternatively, multiple closing coils are provided, so that even if some closing coils fail, closing can be realized, and the connection between the first target isolation component and the second target isolation component is turned on, which has a high closing reliability.

[0011] In some embodiments, the driving device includes a driving component, and the driving component includes 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.

[0012] In the above scheme, the driving device includes a driving component, and the same driving component is provided with at least one closing driving switch and at least two opening driving switches. Different opening coils realize opening driving through the same driving component, which can effectively reduce the volume of the driving device and save hardware costs.

[0013] 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.

[0014] In the above solution, the driving device includes a first driving component and a second driving component. Different opening coils can be driven by different driving components to achieve opening, and different closing coils can be driven by different driving components to achieve closing. When a driving component fails, the opening and closing drives can still be performed by another driving component, further improving the operational reliability of the disconnector system.

[0015] 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.

[0016] In the above scheme, the driving device includes a first driving component and a second driving component. Different opening coils can realize opening drive through different driving components. When there is a driving component failure, the opening drive can still be performed through another driving component, which effectively improves the reliability of the opening drive.

[0017] In some embodiments, 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, and the main power supply switch and the redundant power supply switch are respectively used to connect different power supplies.

[0018] In the above scheme, the opening coil can be connected to different power supplies through the main power supply switch and the redundant power supply switch respectively, so as to realize redundant power supply of the opening coil. In the event of a power failure, the opening coil connected to a different power supply can still drive the opening, thereby effectively improving the reliability of the opening power supply.

[0019] 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 opening coil, and the state feedback component is connected to the driving device.

[0020] In the above scheme, an energy storage motor and / or a state feedback component is provided 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 operating reliability of the isolating switch system.

[0021] In some embodiments, the isolating switch system further includes a control device, wherein the control device is connected to the driving device.

[0022] In the above scheme, the isolating switch system also includes a control device, an over-control device and a driving 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.

[0023] 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 two ends of the opening switch of the isolating switch device are respectively connected to the power module and the energy storage module.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] In the above scheme, the opening coil or the 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 operation, further improving the reliability of opening and closing.

[0028] 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.

[0029] In the above scheme, the main bus power supply obtains energy from the main bus between the energy storage module connected to the current isolating switch system and the isolating switch device, or the redundant bus power supply obtains energy from the main bus between the energy storage module connected to the adjacent isolating switch system and the isolating switch device, which has a high energy acquisition convenience.

[0030] 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

[0031] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

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

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

[0034] Figure 3 This is a schematic diagram of the signal trend of the isolating switch system in some embodiments of the present application;

[0035] Figure 4 A schematic diagram of signal trends of an isolating switch system in some other embodiments of the present application;

[0036] Figure 5 A schematic diagram of signal trends of an isolating switch system in some other embodiments of the present application;

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

[0038] Figure 7 A schematic diagram of signal trends of an isolating switch system in some embodiments of the present application;

[0039] Figure 8 A schematic diagram of signal trends of an isolating switch system in some other embodiments of the present application;

[0040] Fig. 9 This is a schematic diagram of the signal flow of the isolating switch system in some other embodiments of the present application. DETAILED DESCRIPTION

[0041] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field 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" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0043] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0044] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0045] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0046] 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).

[0047] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0048] At present, from the perspective of market development, the application of energy storage systems is becoming more and more extensive, bringing great convenience to daily production and life. High-voltage direct-mounted energy storage has a highly modular structure and can meet the needs of high efficiency, high reliability, economy and safety, and has gradually been developed and applied.

[0049] The high-voltage direct-hung 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 explained as an example in which an isolating switch is generally provided between the energy storage module and the power module. When some energy storage valve sub-modules need to be bypassed due to failures or other reasons, it is necessary not only to bypass the corresponding energy storage valve sub-module through the bypass switch of the power module, but also to control the isolating switch to open the gate to ensure reliable electrical isolation between the energy storage module and the power module, 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 gate opening signal to the isolating switch, the isolating switch often fails to open, which seriously affects the operational safety of the energy storage valve sub-module.

[0050] In order to improve the opening reliability of the isolating switch, when the energy storage valve submodule is bypassed, the power module and the energy storage module can be reliably electrically isolated, thereby improving the operational safety of the energy storage valve submodule. Through research, it is found that the failure of the isolating switch to open is often due to the failure of the device related to the opening control, for example, the failure of the opening coil makes it impossible for the opening coil to reliably drive the corresponding opening switch to open. Based on this, the opening control of the isolating switch can be redundant, 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 be successfully actuated to put the energy storage module and the power module into an electrically isolated state, thereby improving the opening reliability of the isolating switch.

[0051] Based on the above considerations, the technical solution of the embodiment of the present application provides an isolating switch system, wherein the isolating switch device is provided with two or more opening coils, and the opening coils are connected to a driving device, and the driving device is used to drive the opening and closing between the opening coils and the power supply, that is, to get power or lose power. Therefore, when the opening condition is met, the driving device can conduct the connection between the opening coil and the power supply, the opening coil is energized, and the corresponding opening switch is driven to perform the corresponding opening action, and finally disconnect the connection between the energy storage module and the power module.

[0052] In the scheme of this embodiment, the power on and off control of the opening coil is realized by the driving device, and the driving device is activated when the opening condition is met. Even if some of the opening coils fail, the opening coils in normal operation will still be powered by the power supply through the driving device, thereby realizing the opening function. That is, when there are opening coils in normal operation, the opening function can be realized according to the opening signal, and the opening reliability is high.

[0053] The solution of the embodiment 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 need to be electrically isolated. When there is a need to open the switch, the connection between the opening coil of the isolating switch device and the power supply is turned on through the action of the driving device, so that the opening coil meets the opening condition, thereby executing the opening action, and finally achieving electrical isolation between the first target isolation component and the second target isolation component when at least one opening coil is opened successfully.

[0054] In more detail, in one embodiment, the isolating switch system can be used in an energy storage scenario, 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.

[0055] Furthermore, in a more detailed embodiment, the isolating 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. When the power module is bypassed, the driving device is actuated to eventually enable at least one opening coil to open successfully, thereby electrically isolating the power module and the energy storage module.

[0056] In order to facilitate understanding of the technical solution of the present application, the following may be understood as an isolating switch system being applied to an energy storage valve submodule, the first target isolation component including a power module, and the second target isolation component including an energy storage module.

[0057] 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 disconnecting switch (not shown) and two or more disconnecting coils 116, each disconnecting coil 116 drives the same disconnecting switch, and the driving devices 114 are respectively connected to the disconnecting coils 116.

[0058] Specifically, the opening coil 116 is connected to the first target isolation component and the second target isolation component respectively, and the first target isolation component is one of the target components that needs to be electrically isolated from other components through the isolation switch device. The first target isolation component is another target component that needs to be electrically isolated from other components through the isolation switch device. The isolation switch device 112 is a switch device that can achieve electrical isolation between the first target isolation component and the second target isolation component. The opening coil 116 is a functional device in the isolation switch device 112 for realizing the opening drive. The driving device 114 is a device used to drive the opening coil 116 to be on and off (that is, to be powered on or off) with the power supply.

[0059] Each opening coil 116 in the isolating switch device 112 is connected to a power source. When driven by the driving device 114, the connection between the opening coil 116 and the power source is disconnected. At this time, the opening coil 116 loses power, and the opening switch does not operate, and the opening function is not performed. When driven by the driving device 114, the connection between the opening coil 116 and the power source is turned on, and the opening coil 116 is energized to drive the opening switch to start operating and perform the opening function.

[0060] It can be understood that there is not only one way to determine whether the isolating switch system meets the opening conditions. In one embodiment, when the isolating switch system needs to be opened, the user or the upper control device sends an opening command to the isolating switch system. After the driving device 114 receives the opening command, it controls the connection between the opening coil 116 and the power supply, and realizes the opening function through the opening switch action.

[0061] 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.

[0062] It should be pointed out that the number of the opening coils 116 provided in the disconnector is not unique. In a more detailed embodiment, two opening coils 116 may be provided, and the two opening coils 116 are respectively connected to the drive device 114 and the power supply, and the two opening coils 116 drive one opening switch at the same time. When the opening condition is met, the drive device 114 is actuated, and the connection between the two opening coils 116 and the power supply is turned on at the same time. As long as any one of the opening coils 116 is energized normally, the opening switch can be driven to operate, and the electrical isolation between the first target isolation component and the second target isolation component can be completed. In this way, even if one of the opening coils 116 fails, the first target isolation component and the second target isolation component can still be electrically isolated, which can improve the opening reliability of the disconnector and effectively reduce the circuit volume of the disconnector system, saving circuit costs.

[0063] In another embodiment, in order to further improve the opening reliability of the isolating switch, three or more opening coils 116 may be provided. When the opening condition is met, the driving device 114 simultaneously conducts the connection between each opening coil 116 and the power supply. At this time, only one opening coil 116 needs to be energized normally to electrically isolate the first target isolation component from the second target isolation component. In this isolating switch system, even if two or more isolating switch components fail, the opening function can still be achieved, and the opening reliability is higher.

[0064] In the above-mentioned isolating switch system, the isolating switch device 112 is provided with an opening switch and more than two opening coils 116 that perform the opening function, the opening switch is respectively connected to the first target isolation component and the second target isolation component, and each opening coil 116 is respectively connected to the driving device 114. When the driving device 114 detects that the opening condition is met, the driving device 114 is actuated to conduct the connection between each opening coil 116 and 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 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 isolating switch device 112 is provided with a plurality of opening coils 116, and even if some of the opening coils 116 fail, it will not affect the electrical isolation of the first target isolation component and the second target isolation component, and has a high opening reliability.

[0065] See also Figure 2In 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 the closing coil 212 is used to drive the closing switch.

[0066] Specifically, the closing coil 212 is a functional device that conducts the connection between the first target isolation component and the second target isolation component when powered. In the solution of this embodiment, the isolation switch device 112 is also provided with a closing coil 212, and the closing switch is respectively connected to the first target isolation component and the second target isolation component, and the closing coil 212 is also connected to the driving device 114, so under the action of the driving device 114, the closing coil 212 is powered to drive the closing switch to achieve the closing action, and conduct the connection between the first target isolation component and the second target isolation component.

[0067] In the above scheme, 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.

[0068] It should be noted that the number of closing coils 212 provided in the isolating 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, and at this time, the isolating switch device 112 has a switch-off redundancy function, and when there is a closing requirement, it is achieved through one closing coil 212. In this way, setting one closing coil 212 to implement the closing function can effectively reduce the circuit volume of the isolating switch system and reduce costs.

[0069] In another embodiment, the closing coil 212 can also be redundantly set, and multiple closing coils 212 are set in the same isolating switch system. Similar to the opening of the opening coil 116, when the closing condition is met, the driving device 114 conducts the connection between the closing coil 212 and the power supply, and when at least one closing coil 212 is energized, the closing switch is driven to operate, and the connection between the first target isolation component and the second target isolation component is conducted. In this way, even if there is a failure of some closing coils 212, closing can be achieved, and the connection between the first target isolation component and the second target isolation component can be conducted, with high closing reliability.

[0070] See also Figure 3In some embodiments, the driving device 114 includes a driving component 414, and 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.

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

[0072] It can be understood that the specific types of the opening drive switch 612 and the closing drive switch 614 are not unique, as long as the switch device can conduct the connection between the opening coil 116 and the power supply, or conduct the connection between the closing coil 212 and the power supply under the action of the opening signal or the closing signal. For example, in a more detailed embodiment, the opening drive switch 612 and the closing drive switch 614 both include a relay, and after the relay receives the opening signal, it conducts the connection between the opening coil 116 and the power supply, or conducts the connection between the closing coil 212 and the power supply through its own contact switch action.

[0073] 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, and the opening drive switch 612 and the closing drive switch 614 are integrated on the isolating switch drive board, and the internal circuits of the drive assembly 414 are routed on the isolating switch drive board. In this way, the drive assembly 414 can be modularly arranged, and when there is a need to replace the drive assembly 414, the isolating switch drive board can be directly replaced, which effectively improves the maintenance convenience of the isolating switch system.

[0074] In the above scheme, the driving device 114 includes a driving component 414, and 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 realize opening driving through the same driving component 414, which can effectively reduce the volume of the driving device 114 and save hardware costs.

[0075] See also 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 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.

[0076] Specifically, in the solution of this embodiment, the drive assembly of the drive device 114 is set to two, and 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 realize the drive control of opening and closing. The second drive assembly 4144 only includes the opening drive switch 612, which is used to realize the drive control of opening. The first drive assembly 4142 and the second drive assembly 4144 both include an isolating switch drive board for integrating the opening drive switch 612 and the wiring.

[0077] 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 failure 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.

[0078] In the above scheme, the driving device 114 includes a first driving component 4142 and a second driving component 4144. Different opening coils 116 can realize opening drive through different driving components. When there is a driving component failure, the opening drive can still be performed through another driving component, which effectively improves the reliability of the opening drive.

[0079] Further, in one embodiment, 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.

[0080] Specifically, the solution of this embodiment is similar to the solution of the above embodiment, both of which use different drive components to realize the opening drive. The difference is that in the solution of this embodiment, the closing coil 212 is also redundantly set, and different closing coils are driven by different closing drive components.

[0081] 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 to achieve opening, and different closing coils can be driven by different driving components to achieve closing. When a driving component fails, another driving component can still be used to drive opening and closing, further improving the operational reliability of the disconnector system.

[0082] Please refer to Figure 3-Figure 5 In some embodiments, the isolating switch system further includes a main power switch K1 and a redundant power switch K2, at least one opening coil 116 is connected to the main power switch K1, at least one opening coil 116 is connected to the redundant power switch K2, and the main power switch K1 and the redundant power switch K2 are respectively used to connect different power sources.

[0083] Specifically, in the solution of this embodiment, different opening coils 116 obtain electric energy from different power supplies. When the main power switch K1 is turned on, the power supply connected to the main power switch K1 can transmit electric energy to the opening coil 116 connected to the main power switch K1 for opening drive. When the redundant power switch K2 is turned on, the power supply connected to the redundant power switch K2 can transmit electric energy to the opening coil 116 connected to the redundant power switch K2 for opening drive.

[0084] In the above scheme, the opening coil 116 can be connected to different power supplies through the main power supply switch K1 and the redundant power supply switch K2 respectively, so as to realize redundant power supply of the opening coil 116. In the event of a power failure, the opening coil 116 connected to different power supplies can still drive the opening, thereby effectively improving the reliability of the opening power supply.

[0085] In some embodiments, reference may be made to Figure 6 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 opening coil 116, and the state feedback component 620 is connected to the driving device 114 (not shown).

[0086] 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, in which 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.

[0087] 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 opening coil is energized, the energy storage motor 610 can drive the energy storage mechanism to compress the spring of the opening mechanism, so that the opening mechanism spring generates a certain amount of compression energy, and the opening control is achieved through the stretching of the spring. The state feedback component 620 is a device used to monitor the operating state of the disconnector device 112 and feed it back to the drive device 114. Specifically, in the actual application scenario, the state feedback component 620 first feeds back the opening and closing states 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.

[0088] In the above scheme, 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.

[0089] See also Figure 7 In some embodiments, the isolating switch system further includes a control device 412 , which is connected to the driving device 114 .

[0090] Specifically, the driving device 114 is a device for driving the opening and closing between the opening coil 116 and the power supply, or driving the opening and closing between the closing coil 212 and the power supply. The control device 412 is a device for analyzing whether closing or opening is required, and controlling the driving device 114 to act when closing is required, or controlling the driving device 114 to act when opening is required.

[0091] In the solution of this embodiment, the isolating switch system includes a driving device 114 part and a control device 412 part. The control device 412 can communicate with other control devices to obtain the required operating status of the isolating switch. When receiving the opening signal or monitoring that the opening condition is met, the opening control signal is sent to the driving device 114, so that the driving device 114 conducts the connection between the opening coil 116 and the power supply. When the control device 412 receives the closing signal or monitoring that the closing condition is met, the closing control signal is sent to the driving device 114, so that the driving device 114 conducts the connection between the closing coil 212 and the power supply.

[0092] In more detail, in one embodiment, the driving device 114 and the control device 412 are connected via an optical fiber, and the opening 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 opening coil 116 or the closing coil 212 is performed.

[0093] 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.

[0094] Some embodiments of the present application further provide an energy storage valve submodule, including 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.

[0095] Specifically, the isolating switch system is as shown in the above-mentioned embodiments and the accompanying drawings. In the scheme of 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 through the main bus, and the isolating switch device 112 is arranged on the main bus between the power module and the energy storage module. The main bus is divided into the main bus between the power module and the isolating switch device 112 and the main bus between the isolating switch device 112 and the energy storage module through the isolating switch device 112. 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 through the main bus.

[0096] 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 connected to the driving device 114 respectively. When the driving device 114 detects that the opening condition is met, the driving device 114 is actuated to conduct the connection between each opening coil 116 and 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, and 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 a high opening reliability.

[0097] In some embodiments, see Figure 8 or Fig. 9 The control device 412 of the isolating 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 .

[0098] Specifically, the solution of this embodiment takes the application of the isolating switch system in the energy storage system as an example. Specifically, the isolating switch system is applied in the energy storage valve submodule, the first target isolation component includes the power module, and the second target isolation component includes the energy storage module. The energy storage module controller 514 is a control device in the energy storage valve submodule for controlling 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 exchange information with the energy storage module controller 514.

[0099] In the solution of this embodiment, the control of the drive device 114 is implemented through a dual controller, 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 switch, the energy storage module controller 514 and the power module controller 512 can simultaneously send an opening signal to the drive device 114. When the drive device 114 receives any one of the opening signals, it can start to execute the opening 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, and the drive device 114 can start executing the closing action when receiving any one of the closing signals.

[0101] It can be understood that in other embodiments, the closing signal can also be sent by any one of the energy storage module controller 514 and the power module controller 512, and when the drive device 114 receives the closing signal sent by the energy storage module controller 514 or receives the closing signal sent by the power module controller 512, it starts to execute the closing action.

[0102] In the above scheme, taking the isolating switch system applied to 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, and 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 sending reliability of the trip signal.

[0103] 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 isolating 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.

[0104] Specifically, the main bus power supply is a device that draws energy from the main bus to provide electric energy for 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 electric energy for the opening coil 116 or the closing coil 212. In the scheme of this embodiment, in order to further improve the reliability of the opening, the opening coil 116 is connected to different power supplies. Specifically, part of the opening coil 116 is connected to the main bus power supply through the main power supply switch K1, and part of the opening coil 116 is connected to the redundant bus power supply through the redundant power supply switch K2. If the main bus power supply fails, part of the opening coil 116 can continue to draw energy from the redundant bus power supply to achieve the opening function.

[0105] The closing coil 212 needs to be connected to the power supply according to the actual situation. When there is only one closing coil 212, the closing coil 212 can be powered by the main bus power supply or the redundant bus power supply, and there is no specific limitation. When there are two or more closing coils 212, each closing coil 212 can be powered by the main bus power supply or the redundant bus power supply at the same time. In other embodiments, similar to the opening coil 116, some closing coils 212 are powered by the main bus power supply, and some closing coils 212 are powered by the redundant bus power supply to improve the power supply reliability of the closing coil 212.

[0106] In the above scheme, 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 reliability of opening and closing.

[0107] 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.

[0108] 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.

[0109] Specifically, in the scheme of the above-mentioned 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, and then converted and stored to obtain electric energy suitable for the operation of the opening coil 116 and the closing coil 212. In the actual application scenario, the number of the first target isolation component and the second target isolation component is not unique, and each group of the first target isolation component and the second target isolation component 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 taken from 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.

[0110] It can be understood that in other embodiments, the redundant bus power supply can also obtain energy from other power supplies, such as independently arranged power supply devices, etc. There is no specific limitation and the selection can be made based on actual needs.

[0111] In more detail, the application of the isolating switch system in the energy storage valve submodule is used as an example for explanation. At this time, the main bus power source draws energy from the main bus (i.e., the battery bus) between the isolating switch device and the energy storage module in the energy storage valve submodule to which the current isolating switch system belongs, while the redundant bus power source draws energy from the main bus between the isolating switch device and the energy storage module of other energy storage valve submodules. Specifically, in order to reduce power lines and reduce the risk of energy extraction, the redundant bus power source can draw energy from the main bus of the adjacent energy storage valve submodule.

[0112] Through this energy-taking method, even if the isolating switch 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 isolating switch device can still continue to obtain electrical energy from the energy storage module through the main bus between the isolating switch device and the energy storage module, thereby maintaining the opening function and improving the opening reliability.

[0113] 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 convenience in energy acquisition.

[0114] 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.

[0115] Please refer to Figure 8 In the solution of 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, and the isolating switch system includes a driving device 114 and a control device 412. Among them, the control device 412 includes an energy storage module controller 514 and a power module controller 512, and the driving device 114 includes a first driving component 4142 and a second driving component 4144. The first driving component 4142 includes at least one opening drive switch 612 and at least one closing drive switch 614, and the second driving component 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 an opening coil 116, and each closing drive switch 614 drives a closing coil 212. Each closing coil 212 drives the same closing switch, each opening coil 116 drives the same opening switch, and both the closing drive switch 614 and the opening drive switch 612 are relays.

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

[0117] Further, part of the opening coil 116 is connected to the main bus power supply through the main power switch K1, and the main bus power supply draws energy from the main bus of the current energy storage valve submodule (specifically connected to the main bus between the isolating switch device 112 and the energy storage module); part of the opening coil 116 is connected to the redundant bus power supply through the redundant power switch K2, and the redundant bus power supply draws energy 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). And part of the closing coil 212 is connected to the main bus power supply through the main power switch K1, and part of the closing coil 212 is connected to the redundant bus power supply through the redundant power switch K2.

[0118] When the opening condition is met, the energy storage module controller 514 sends an opening signal to each opening drive switch 612 in the first drive assembly 4142, and the power module controller 512 sends an opening signal to each opening drive switch 612 in the second drive assembly 4144. After that, each opening drive switch 612 is actuated to connect the corresponding opening coil 116 with the power supply. After at least one opening coil 116 is energized to cause the opening switch to actuate, the connection between the power module and the energy storage module is disconnected to achieve electrical isolation.

[0119] When the closing condition is 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. After that, each closing drive switch 614 is actuated to connect the corresponding closing coil 212 with the power supply. After at least one closing coil 212 is energized to activate the closing switch, the connection between the power module and the energy storage module is connected to close the isolation switch.

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

[0121] Specifically, the energy storage valve submodule is as shown in the above-mentioned embodiments and the accompanying drawings. In the actual use scenario, each energy storage valve submodule can be cascaded to form an energy storage valve. In this solution, the energy storage valve submodule is further applied to the energy storage system. The isolating switch device 112 is provided with more than two opening coils 116 that perform the opening function. The opening switch is respectively connected to the power module and the energy storage module, and each opening coil 116 is respectively connected to the power supply through the driving device 114. When the driving device 114 detects that the opening condition is met, the driving device 114 acts to conduct the connection between each opening coil 116 and the power supply. At this time, the opening coil 116 in the normal state is energized and performs the opening action. After at least one opening coil 116 is opened successfully, 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 a high opening reliability.

[0122] 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 replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate 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, characterized in that: include: 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; A driving device is connected to the opening coils respectively.

2. The isolating switch system according to claim 1, characterized in that: 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, characterized in that: 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, characterized in that: 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, 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, 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, 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, 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, characterized in that: It 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, at least one of the opening 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 different power supplies.

8. The isolating switch system according to any one of claims 1 to 6, characterized in that: 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 6, characterized in that: It also includes a control device, which is connected to the driving device.

10. An energy storage valve submodule, characterized in that: It comprises a power module, an energy storage module and an isolating switch system as claimed in 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, characterized in that: 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, characterized in that: 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, characterized in that: 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, characterized in that: It comprises a converter valve and an energy storage valve submodule as described in any one of claims 10-13.

Images