Switching system and method of controlling a switching system

Abstract

This application provides a switching system and a control method for the switching system, relating to the field of electrical equipment technology. In this switching system, the input terminal of the execution module is connected to the power supply terminal, and the output terminal of the execution module is connected to the load. The execution module includes a fast mechanical switch; a data acquisition module for acquiring operating status parameters of the circuit containing the load and sending them to a control module; and a control module for determining, based on the operating status parameters, whether to generate a disconnection control signal or a closing control signal, and sending it to the execution module so that the execution module switches from a closed state to a disconnection state according to the disconnection control signal, or from a disconnection state to a closed state according to the closing control signal. The introduction of the fast mechanical switch results in a faster response speed, higher reliability, and a longer service life for the switching system. Furthermore, since fuses and contactors are not required, miniaturization can be achieved, improving installation flexibility.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and in particular to a switch system and a control method for the switch system. Background Technology

[0002] Energy storage systems are technologies that store electrical energy or other forms of energy and release it when needed. They play an increasingly important role in modern energy systems, especially in the context of the widespread application of renewable energy.

[0003] In the prior art, in order to ensure the safety of energy storage systems, a switching system is often configured in the energy storage system. This switching system generally adopts a high-voltage box containing components such as fuses, disconnect switches, and contactors. The fuses independently respond to current changes and provide short-circuit protection, while the disconnect switches and contactors receive instructions from the host computer to complete the specified opening and closing actions.

[0004] However, in the existing methods of setting up high-voltage boxes in energy storage systems to ensure their safety, the high-voltage boxes have certain requirements for installation space and poor installation flexibility. Summary of the Invention

[0005] The purpose of this application is to address the shortcomings of the prior art by providing a switching system and a control method for the switching system, which can achieve miniaturization of the switching system and improve its installation flexibility. To achieve the above objective, the technical solution adopted in the embodiments of this application is as follows:

[0006] In a first aspect, the present invention provides a switching system, comprising: a data acquisition module, an execution module, and a control module, wherein the data acquisition module and the execution module are respectively communicatively connected to the control module, the input terminal of the execution module is connected to a power supply terminal, the output terminal of the execution module is connected to a load, and the execution module includes a fast mechanical switch;

[0007] The acquisition module is used to acquire the operating status parameters of the circuit where the load is located and send them to the control module;

[0008] The control module is used to send a disconnection control signal or a closure control signal to the execution module if it determines that a disconnection control signal or a closure control signal is to be generated based on the operating status parameters of the circuit where the load is located.

[0009] The execution module is configured to switch from a closed state to a closed state according to the disconnection control signal, or to switch from a closed state to a closed state according to the closing control signal.

[0010] In an optional implementation, the execution module includes at least one sub-execution module, each sub-execution module including a series-connected isolating switch and a hybrid switch, the hybrid switch including: a semiconductor power device, a fast mechanical switch and an energy absorption module connected in parallel; or, each sub-execution module includes a fast mechanical switch and a hybrid switch connected in parallel, the hybrid switch including: a series-connected isolating switch and a sub-module, the sub-module including a semiconductor power device and an energy absorption module connected in parallel;

[0011] The fast mechanical switch is used to perform closing or opening operations according to the closing control signal or opening control signal sent by the control module;

[0012] The semiconductor power device is used to perform current commutation when the fast mechanical switch is turned off;

[0013] The energy absorption module is used to absorb or release the residual energy corresponding to the fast mechanical switch being disconnected and / or release the overvoltage generated when the semiconductor power device is disconnected.

[0014] The disconnecting switch is used to achieve electrical isolation when the semiconductor power device is turned off or closed.

[0015] In an optional embodiment, the energy absorption module includes: an RC branch and a metal oxide varistor (MOV) branch; the RC branch includes a resistor and a capacitor connected in series; the MOV branch is used to release the overvoltage generated when the semiconductor power device is disconnected or to release the remaining energy corresponding to the fast mechanical switch being disconnected; the RC branch is used to absorb the remaining energy corresponding to the fast mechanical switch being disconnected.

[0016] In an optional implementation, the control module is specifically used to determine whether the operating status parameters are abnormal based on the operating status parameters of the circuit where the load is located.

[0017] If so, a first control signal is generated to cause the semiconductor power device to switch from an off state to an on state according to the first control signal;

[0018] After the semiconductor power device switches to the on state, a second control signal is generated so that the fast mechanical switch switches from the closed state to the open state according to the second control signal;

[0019] After the fast mechanical switch is switched to the off state, a third control signal is generated so that the semiconductor power device switches from the on state to the off state according to the third control signal;

[0020] After the semiconductor power device switches to the off state, a fourth control signal is generated so that the disconnecting switch switches from the on state to the off state according to the fourth control signal.

[0021] In an optional implementation, the control module is further configured to generate a fifth control signal in response to a closing control command, so that the disconnecting switch switches from an open state to a closed state according to the fifth control signal;

[0022] After the disconnecting switch switches from the open state to the on state, a sixth control signal is generated to cause the semiconductor power device to switch from the open state to the on state according to the sixth control signal;

[0023] When the semiconductor power device switches from an off state to an on state, a seventh control signal is generated to cause the fast mechanical switch to switch from an off state to a closed state according to the seventh control signal;

[0024] After the fast mechanical switch switches from the open state to the closed state, an eighth control signal is generated to switch the semiconductor power device from the closed state to the open state.

[0025] In an optional implementation, the control module is further configured to generate a ninth control signal when the semiconductor power device switches from an off state to an on state according to the sixth control signal, if a short circuit fault is determined to have occurred based on the operating state parameters of the circuit in which the load is located, so that the semiconductor power device switches from an on state to an off state according to the ninth control signal.

[0026] After the semiconductor power device switches to the off state, a tenth control signal is generated so that the disconnecting switch switches from the on state to the off state according to the tenth control signal.

[0027] In an optional implementation, the execution module and the control module are connected for communication via a preset interface;

[0028] The interface type of the preset interface is any one of the following: threaded connection, bayonet connection, locking connection, push-pull connection, or plug-in connection.

[0029] In an optional embodiment, the switching system further includes: a human-machine interaction module, which is communicatively connected to the control module, and is used to receive a closing control command or a closing control command and send it to the control module;

[0030] The control module is configured to generate a closing control signal or a disconnection control signal in response to the closing control command or the disconnection control command, and send the closing control signal or the disconnection control signal to the execution module;

[0031] The execution module is configured to switch from an open state to a closed state according to the closing control signal, or to switch from a closed state to an open state according to the disconnection control signal.

[0032] In an optional implementation, the control module is already present in the target service scenario, and the target service scenario is equipped with a power business system.

[0033] Secondly, the present invention provides a control method for a switching system, applied to a control module in a switching system according to any of the foregoing embodiments, the method comprising:

[0034] The receiver module collects the operating status parameters of the circuit where the load is located.

[0035] Based on the operating status parameters of the circuit where the load is located, if it is determined that a disconnection control signal or a closure control signal will be generated, the disconnection control signal or the closure control signal will be sent to the execution module so that the disconnection operation or the closure operation can be performed through the execution module.

[0036] The beneficial effects of this application are:

[0037] The switching system and control method provided in this application include: a data acquisition module, an execution module, and a control module. The data acquisition module and the execution module are communicatively connected to the control module. The input terminal of the execution module is connected to the power supply terminal, and the output terminal of the execution module is connected to the load. The execution module includes a fast mechanical switch. The data acquisition module is used to acquire the operating status parameters of the circuit where the load is located and send them to the control module. The control module is used to send a disconnection control signal or a closing control signal to the execution module if it determines that a disconnection control signal or a closing control signal is to be generated based on the operating status parameters of the circuit where the load is located. The execution module is used to switch from a closed state to a disconnected state based on the disconnection control signal, or to switch from a disconnected state to a closed state based on the closing control signal. By applying this application embodiment, the introduction of the fast mechanical switch results in a switching system with faster response speed, higher reliability, longer service life, and higher intelligence. Furthermore, since this application does not require the introduction of components such as fuses and contactors, the switching system can be miniaturized, improving installation flexibility. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 A schematic diagram of a switching system provided in an embodiment of this application;

[0040] Figure 2 A circuit diagram of an execution module provided in an embodiment of this application;

[0041] Figure 3 A schematic diagram of the circuit principle of another execution module provided in an embodiment of this application;

[0042] Figure 4 A schematic diagram of another switching system provided in an embodiment of this application;

[0043] Figure 5 A schematic diagram of another switching system provided in an embodiment of this application;

[0044] Figure 6 A schematic diagram of another switching system provided in an embodiment of this application;

[0045] Figure 7 This is a flowchart illustrating a control method for a switching system provided in an embodiment of this application. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0047] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0048] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0049] In the prior art, in order to ensure the safety of energy storage systems, a switching system is often configured in the energy storage system. This switching system generally adopts a high-voltage box containing components such as fuses, disconnect switches, and contactors. The fuses independently respond to current changes and provide short-circuit protection, while the disconnect switches and contactors receive instructions from the host computer to complete the specified opening and closing actions.

[0050] It can be seen that in the existing method of setting up a switch system through a high-voltage box, the high-voltage box is relatively large, which requires a certain amount of installation space, and the installation cost is high because it includes components such as fuses and contactors.

[0051] In view of this, the present application provides a switch system that can be miniaturized and, depending on the specific application scenario, the control module can also be used to implement other functions, realizing multiple uses of the control module and thus reducing the setup cost.

[0052] Figure 1 A schematic diagram of a switching system provided in an embodiment of this application is shown below. Figure 1 As shown, the switching system may include: a data acquisition module 101, an execution module 102, and a control module 103. The data acquisition module 101 and the execution module 102 are respectively connected to the control module 103. The input terminal of the execution module 102 is connected to the power supply terminal 104, and the output terminal of the execution module 102 is connected to the load 40.

[0053] The acquisition module 101 is used to acquire the operating status parameters of the circuit where the load is located and send them to the control module 103; the control module 103 is used to send the disconnection control signal or the closure control signal to the execution module 102 if it is determined that a disconnection control signal or a closure control signal is to be generated based on the operating status parameters of the circuit where the load 40 is located; the execution module 102 is used to switch from the closure state to the disconnection state based on the disconnection control signal, or to switch from the disconnection state to the closure state based on the closure control signal.

[0054] Optionally, the power supply can be a DC power supply or an AC power supply, which is not limited here and can be flexibly set according to the actual application scenario.

[0055] In some embodiments, the acquisition module may include a current acquisition module, a voltage acquisition module, a temperature acquisition module, etc., wherein the current acquisition module can be used to acquire the current parameters of the circuit where the load is located, the voltage acquisition module can be used to acquire the voltage of the circuit where the load is located, and the temperature acquisition module can be used to acquire the temperature of the execution module (e.g., the copper busbar in the execution module).

[0056] It should be noted that in some embodiments, the control module may include a processor and a drive control module. Specifically, the acquisition module and the drive control module are respectively connected to the processor, and the execution module is connected to the drive control module.

[0057] The acquisition module collects operating status parameters (such as current, voltage, and temperature parameters) and sends them to the processor in the control module. The processor determines whether the operating status parameter is abnormal according to preset rules. If abnormal, it generates a disconnection control signal and sends it to the drive control module. The drive control module generates a disconnection control drive signal for the execution module based on the disconnection control signal and sends it to the execution module. The execution module can then switch from a closed state to an open state based on the disconnection control drive signal. Optionally, the cause of the abnormality can be a short circuit fault, excessive temperature, overvoltage or undervoltage fault, etc., which is not limited here.

[0058] Optionally, in certain scenarios, if the operating status parameters of the circuit containing the load are determined to be normal and meet the preset closing conditions of the switching system, the control module can also generate a closing control signal and send it to the execution module. The execution module then switches from the open state to the closed state based on this closing control signal, achieving flexible switching between closed states. Optionally, the closing control signal can be automatically generated by the control module based on the operating status parameters of the circuit containing the load, or it can be generated by a human-machine interface module that communicates with the control module; this is not limited here.

[0059] Optionally, the execution module can be based on a fast mechanical switch (FMS), which is an electrical device with a mechanically movable contact capable of completing circuit connection or disconnection operations in a very short time. After receiving the disconnection control signal, the execution module can switch from a closed state to an open state. It can be seen that, due to the introduction of the fast mechanical switch, compared to existing high-voltage box installation methods, the switch system provided in this application embodiment has a faster response speed, higher reliability, longer service life, and higher level of intelligence. Furthermore, since this application does not require the introduction of components such as fuses and contactors, the switch system can be miniaturized, improving installation flexibility.

[0060] It should be noted that, since the control module in this application is mainly used to determine whether to generate a disconnection control signal based on the operating status parameters of the circuit where the load is located, in some scenarios, the control module can also be reused to implement other functions (such as battery management functions in energy storage scenarios), improving the applicability of the switching system. Of course, in some scenarios, the acquisition module and execution module can also be further integrated into the existing control module (for example, in a data center power system, the existing control module is used to safely manage the power consumption of servers in the data center electronic system) to achieve rapid setup of the switching system, thereby reducing the setup cost of the switching system.

[0061] In summary, this application provides a switching system including: a data acquisition module, an execution module, and a control module. The data acquisition module and the execution module are communicatively connected to the control module. The input terminal of the execution module is connected to the power supply terminal, and the output terminal of the execution module is connected to the load. The execution module includes a fast mechanical switch. The data acquisition module is used to acquire the operating status parameters of the circuit where the load is located and send them to the control module. The control module is used to, based on the operating status parameters of the circuit where the load is located, determine whether to generate a disconnection control signal or a closing control signal, and then send the disconnection control signal or the closing control signal to the execution module. The execution module is used to switch from a closed state to a disconnected state based on the disconnection control signal, or to switch from a disconnected state to a closed state based on the closing control signal. By applying this application embodiment, the introduction of the fast mechanical switch results in a switching system with faster response speed, higher reliability, longer service life, and higher intelligence. Furthermore, since this application does not require the introduction of components such as fuses and contactors, the switching system can be miniaturized, improving installation flexibility.

[0062] Figure 2 This is a schematic diagram of the circuit principle of an execution module provided in an embodiment of this application. Figure 3 This is a schematic diagram of the circuit principle of another execution module provided in an embodiment of this application. In an optional implementation, the execution module 102 includes at least one sub-execution module 110. Optionally, depending on the actual application scenario, the sub-execution module 110 may include one or two.

[0063] Taking a DC power supply as an example, when a sub-execution module 110 is included, the input terminal of the sub-execution module 110 can be connected to the positive or negative terminal of the DC power supply, and the output terminal of the sub-execution module 110 is connected to the load.

[0064] To better understand this application, the following embodiments are all illustrated using the example of execution module 102 including two parallelly connected sub-execution modules 110. Figure 2 As shown, each sub-execution module 110 includes a disconnecting switch 20 and a hybrid switch 30 arranged in series. The hybrid switch 30 includes a semiconductor power device 31, a fast mechanical switch 32 and an energy absorption module 33 arranged in parallel.

[0065] In an optional implementation, the execution module may also be referred to Figure 3 The configuration shown includes an execution module 10 comprising a fast mechanical switch 32 and a hybrid switch 30 connected in parallel. The hybrid switch 30 includes a disconnect switch 20 and a submodule connected in series. The submodule includes a semiconductor power device 31 and an energy absorption module 33 connected in parallel.

[0066] See Figure 2and Figure 3 As can be seen from the methods described, the difference between the two setting methods lies in the setting method of the hybrid switch, the setting position of the isolating switch, and the setting position of the fast mechanical switch. Optionally, depending on the actual application scenario, one can choose... Figure 2 or Figure 3 The settings are shown below.

[0067] Furthermore, taking a DC power supply as an example, when the execution module 102 includes two sub-execution modules 110, the input terminals of each sub-execution module 110 can be connected to the positive DC+ and negative DC+ terminals of the DC power supply, respectively, and the output terminals of each sub-execution module are connected to the load 40.

[0068] It should be noted that, of course, in some embodiments, a DC-DC converter can also be used to convert the DC voltage at the power supply end into a DC voltage that can be used to power the control module and the acquisition module.

[0069] The fast mechanical switch 32 is used to close or open the circuit according to the closing or opening control signal sent by the control module. When closed, it can carry the rated current for a long time, and when opened, it can achieve electrical isolation. The fast mechanical switch 32 (FMS) is an electrical device with a mechanical movable contact that can complete the circuit connection or disconnection operation in a very short time.

[0070] Semiconductor power device 31 is used for current commutation when the fast mechanical switch 32 is opened. Optionally, it can be composed of semiconductor materials (such as thyristors, IGBTs, MOSFETs, etc.) and has a module with high current turn-on and turn-off control capability.

[0071] The energy absorption module 33 is used to absorb or release the residual energy corresponding to the opening of the fast mechanical switch 32 and / or release the overvoltage generated when the semiconductor power device is opened. Optionally, it may be composed of at least one energy absorption device (such as RC, TVS, MOV, gas discharge tube, etc.).

[0072] The disconnecting switch 20 is used to provide electrical isolation when the semiconductor power device 31 is open or closed. Specifically, the disconnecting switch 20 can be used to provide electrical isolation between the semiconductor power device 31 and the preceding and following stages after the high-speed switch is opened. For example, in switch system maintenance scenarios, it provides a safe environment for maintenance work and ensures the safety of operators. Optionally, the disconnecting switch 20 can be a mechanical disconnecting switch, which provides an intuitive and visible disconnection point for easy confirmation that the circuit has been disconnected. Of course, it can also be used for electrical isolation when the semiconductor power device is closed.

[0073] In alternative implementations, such as Figure 2 As shown, the energy absorption module 33 includes: an RC branch 35 and a metal oxide varistor (MOV) branch 36; the RC branch 35 includes a resistor R and a capacitor C connected in series; the MOV branch 36 is used to release the overvoltage generated when the semiconductor power device is disconnected or to release the remaining energy corresponding to the fast mechanical switch being disconnected; the RC branch 35 is used to absorb the remaining energy corresponding to the fast mechanical switch being disconnected.

[0074] The values ​​of the resistors and capacitors in the RC branch can be flexibly set according to the actual application scenario. In addition, this application does not limit the value of the metal oxide varistor in the MOV branch, and can be flexibly set according to the actual application scenario.

[0075] It should be noted that fast mechanical switches generally include energy storage elements (such as inductive loads like inductors). When a fast mechanical switch opens, this energy storage element releases residual energy, which can cause an overshoot voltage. This residual energy can be released through the MOV branch and absorbed through the RC branch. It can be seen that the coordinated use of the RC and MOV branches can protect the circuit from overshoot voltages and other transient voltages, ensuring stable operation of the switching system. Furthermore, it should be noted that semiconductor power devices also generate overvoltages when disconnected. In this case, the MOV branch can also be used to release the overvoltage generated when semiconductor power devices disconnect, preventing the circuit from being affected by overvoltages and further ensuring stable operation of the switching system.

[0076] Figure 4 This is a schematic diagram of another switching system provided in an embodiment of this application. In an optional implementation, the control module is specifically used to determine whether the operating status parameters of the circuit where the load is located are abnormal; if so, it generates a first control signal to cause the semiconductor power device to switch from an off state to an on state according to the first control signal; after the semiconductor power device switches to the on state, it generates a second control signal to cause the fast mechanical switch to switch from a closed state to an open state according to the second control signal; after the fast mechanical switch switches to the open state, it generates a third control signal to cause the semiconductor power device to switch from an on state to an off state according to the third control signal; after the semiconductor power device switches to the off state, it generates a fourth control signal to cause the isolating switch to switch from an on state to an off state according to the fourth control signal.

[0077] If the control module includes a processor 105 and a drive control module 107, when the switching system provided in this application is used, if the switching system is currently in a closed state, the acquisition module 101 can poll and acquire the operating status parameters of the circuit where the load 40 is located and send them to the processor. The processor 105 can determine whether the operating status parameters are abnormal according to preset rules. If so, it generates a first control signal and sends it to the drive control module 107. The drive control module 107 generates a first drive control signal according to the first control signal and sends it to the semiconductor power device 31. After receiving the first drive control signal, the semiconductor power device 31 switches from an open state to a closed state, realizing pre-connection before the fast mechanical switch 32 is about to open, thereby achieving smooth current transfer, avoiding arc and voltage spikes caused by sudden disconnection, and achieving the purpose of current commutation.

[0078] After determining that the semiconductor power device 31 has switched to the on state, the processor 105 generates a second control signal and sends it to the drive control module 107. The drive control module 107 generates a second drive control signal based on the second control signal and sends it to the fast mechanical switch 32. After receiving the second drive control signal, the fast mechanical switch 32 switches from the closed state to the open state.

[0079] By first turning on the semiconductor power device 31 and then turning off the fast mechanical switch 32, overcurrent and short-circuit conditions can be detected and responded to in a timely manner. For example, if a short circuit occurs, abnormal current can be detected quickly after the semiconductor power device 31 is turned on, and measures can be taken immediately to turn off the fast mechanical switch 32, cut off the power supply, and prevent further damage. In addition, the risk of arcing and sparking when the mechanical switch is turned off can be reduced. Specifically, if the semiconductor power device 31 has already been turned on and is working stably, the risk of arcing when the mechanical switch 32 is turned off will be reduced.

[0080] After determining that the fast mechanical switch 32 has switched to the off state, the processor 105 generates a third control signal and sends it to the drive control module 107. The drive control module 107 generates a third drive control signal based on the third control signal and sends it to the semiconductor power device 31. After receiving the third drive control signal, the semiconductor power device 31 switches from the on state to the off state.

[0081] Understandably, the fast mechanical switch 32 has already switched to the off state at this time. By controlling the semiconductor power device 31 to switch to the off state, damage to other devices (such as loads) or circuits can be avoided.

[0082] After determining that the semiconductor power device 31 has switched to the off state, the processor 105 generates a fourth control signal and sends it to the drive control module 107. The drive control module 107 generates a fourth drive control signal based on the fourth control signal and sends it to the isolating switch 20. After receiving the fourth control signal, the isolating switch 20 switches from the on state to the off state. As can be seen from the above-mentioned function of the isolating switch, the semiconductor power device can be electrically isolated from the front and rear stages through the isolating switch.

[0083] By first disconnecting the semiconductor power device 31 and then disconnecting the isolating switch 20, dual protection can be provided to ensure that the circuit is completely disconnected. At the same time, the arc generated when the isolating switch 20 is disconnected can be prevented from damaging the semiconductor power device 31.

[0084] It should be noted that the methods for determining whether the operating status parameters are abnormal can include determining whether there are abnormal currents (e.g., overload or short circuit) or abnormal voltages (e.g., overvoltage or undervoltage) in the circuit containing the load, and are not limited here. Furthermore, during the closing process, as mentioned above, the energy absorption module can be used to absorb or release the residual energy corresponding to the opening of the fast mechanical switch and / or release the overvoltage generated when the semiconductor power device is disconnected, preventing residual energy or overvoltage from being properly absorbed or released and affecting the normal operation of the circuit, thus improving the reliability of the switching system.

[0085] By applying the embodiments of this application, when it is determined that the operating status parameters of the circuit where the load is located are abnormal, the control module can control the switching system to quickly switch from the closed state to the open state, which has a fast response speed, high reliability, and high degree of intelligence.

[0086] In an optional implementation, the control module is specifically configured to generate a fifth control signal in response to a closing control command, so that the disconnecting switch switches from an open state to an on state according to the fifth control signal; after the disconnecting switch switches from an open state to an on state, a sixth control signal is generated, so that the semiconductor power device switches from an open state to an on state according to the sixth control signal; after the semiconductor power device switches from an open state to an on state, a seventh control signal is generated, so that the fast mechanical switch switches from an open state to a closed state according to the seventh control signal; and after the fast mechanical switch switches from an open state to a closed state, an eighth control signal is generated, so that the semiconductor power device switches from a closed state to an open state.

[0087] Continue to refer to the above. Figure 4As shown, when the switch system is in the open state, optionally, the closing control command can be generated by the human-machine interface module that communicates with the control module. The processor 105 in the control module can generate a fifth control signal in response to the closing control command and send it to the drive control module 107. The drive control module 107 generates a fifth drive control signal based on the fifth control signal and sends it to the isolating switch 20. After receiving the fifth drive control signal, the isolating switch 20 can switch from the open state to the on state.

[0088] After determining that the disconnector switch 20 has switched from the open state to the on state, the processor 105 can generate a sixth control signal and send it to the drive control module 107. The drive control module 107 then generates a sixth drive control signal based on the sixth control signal and sends it to the semiconductor power device 31. Upon receiving the sixth drive control signal, the semiconductor power device 31 switches from the open state to the on state. Optionally, in some embodiments, a microswitch can be provided on the disconnector switch 20, and the processor 105 can detect the operating state of the disconnector switch through the position detection module 108.

[0089] Understandably, by controlling the isolating switch 20 to turn on before the semiconductor power device 31, the high-voltage part can be isolated from the low-voltage part, reducing the arc and spark generated when the subsequent fast mechanical switch 32 closes, thus ensuring the safety and reliability of the circuit; in addition, it can also prevent overvoltage or short circuit and protect the semiconductor power device.

[0090] After determining that the semiconductor power device 31 has switched from the off state to the on state, the processor 105 generates a seventh control signal and sends it to the drive control module 107. The drive control module 107 generates a seventh drive control signal based on the seventh control signal and sends it to the fast mechanical switch 32. After receiving the seventh drive control signal, the fast mechanical switch 32 switches from the off state to the closed state.

[0091] Understandably, by controlling the semiconductor power device 31 to turn on and then controlling the fast mechanical switch 32 to close, current can flow directly through the semiconductor power device 31 when the fast mechanical switch 32 is closed, without generating unnecessary arcs or sparks. In addition, the semiconductor power device 31 can provide a smoother current transition, reducing the impact on the switching system. It also enables overcurrent protection and short-circuit protection. For example, if a short circuit is detected after the semiconductor power device 31 is turned on, the semiconductor power device 31 can be quickly disconnected, and then the fast mechanical switch 32 can be disconnected to prevent further damage.

[0092] After determining that the fast mechanical switch 32 has switched from the open state to the closed state, the processor 105 generates an eighth control signal and sends it to the drive control module 107. The drive control module 107 generates an eighth drive control signal based on the eighth control signal and sends it to the semiconductor power device 31. After receiving the eighth drive control signal, the semiconductor power device switches from the closed state to the open state.

[0093] Specifically, by controlling the fast mechanical switch 32 to close and then controlling the semiconductor power device 31 to open, the current flows completely through the fast mechanical switch 32.

[0094] By applying the embodiments of this application, when the switching system meets the closed state, the control module responds to the closing control command and controls the switching system to quickly switch from the open state to the closed state. It has a fast response speed, high reliability, and high degree of intelligence, and realizes flexible switching between the open state and the closed state.

[0095] In summary, it can be seen that, depending on the actual application scenario, the switching system provided in this application embodiment can quickly switch from an open state to a closed state, or vice versa, and has a fast response speed and high reliability.

[0096] It should be noted that, referring to Figure 2 Optionally, as shown, the execution module may further include a pre-charge module, which can be connected in parallel with a disconnecting switch or a hybrid switch to prevent damage to the circuit due to a sudden large current when the execution module switches from the disconnected state, thereby improving the reliability of this application. Optionally, the pre-charge module can be a module consisting of a current-limiting resistor and a relay connected in series, which is not limited here.

[0097] In an optional implementation, the control module is further configured to, when the semiconductor power device switches from an off state to an on state according to the sixth control signal, generate a ninth control signal if a short-circuit fault is determined to have occurred based on the operating state parameters of the circuit in which the load is located, so that the semiconductor power device switches from an on state to an off state according to the ninth control signal; and generate a tenth control signal after the semiconductor power device switches to an off state, so that the disconnecting switch switches from an on state to an off state according to the tenth control signal.

[0098] Based on the above, it should also be noted that when the switching system is in the open state, the control module generates a fifth control signal in response to the closing control command, so that the disconnecting switch switches from the open state to the on state according to the fifth control signal; after the disconnecting switch switches from the open state to the on state, a sixth control signal is generated so that the semiconductor power device switches from the open state to the on state according to the sixth control signal.

[0099] Specifically, after the semiconductor power device switches from the off state to the on state according to the sixth control signal, if the control module determines that a short circuit fault has occurred based on the operating status parameters of the circuit where the load is located, it generates a ninth control signal to switch the semiconductor power device from the on state to the off state according to the ninth control signal, thus preventing further damage to other equipment (such as the load) or circuits. In addition, after the semiconductor power device switches to the off state, a tenth control signal is generated to switch the disconnecting switch from the on state to the off state according to the tenth control signal, thereby achieving electrical isolation between the semiconductor power device and the preceding and following stages in terms of electrical connection, ensuring the safety and reliability of the switching system.

[0100] By applying the embodiments of this application, semiconductor power devices and isolating switches can be disconnected in a timely manner after a short circuit fault is detected, so as to avoid further damage to other equipment (such as loads) or circuits and improve the safety of the switching system of this application.

[0101] In an optional implementation, the execution module and the control module communicate with each other through a preset interface; the interface type of the preset interface is any one of the following: threaded connection, bayonet connection, locking connection, push-pull connection, or direct insertion connection.

[0102] The execution module can provide a preset interface. Of course, the control module can be equipped with a matching interface that matches the preset interface. The execution module can communicate with the control module through the preset interface.

[0103] In particular, when applied to scenarios where control modules are already in place (e.g., in a data center power system where existing control modules are used to manage servers in the data center power system), this preset interface allows for the rapid construction of a switch system without referencing additional control modules, thereby reducing the deployment cost of the switch system and improving its applicability.

[0104] It should be noted that the interface type of this preset interface is not limited to the interface methods mentioned above. For example, in some scenarios, the execution module can connect to the matching interface in the control module through the terminal block based on this preset interface to achieve communication.

[0105] Figure 5 This is a schematic diagram of another switching system provided in an embodiment of this application. Optionally, the above-mentioned switching system further includes: a human-machine interaction module 106, which is communicatively connected to the control module 103, and is used to receive closing control commands or opening control commands and send them to the control module 103;

[0106] The control module 103 is configured to generate a closing control signal or a disconnection control signal in response to the closing control command or the disconnection control command, and send the closing control signal or the disconnection control signal to the execution module 102.

[0107] The execution module 102 is used to switch from an open state to a closed state according to the closing control signal, or to switch from a closed state to an open state according to the disconnection control signal.

[0108] Optionally, the human-computer interaction module 106 can be a display screen, buttons, etc., and is not limited thereto. In some embodiments, depending on the actual application scenario, the user can generate a closing control command or a breaking control command by acting on the human-computer interaction module 106. For example, a button not being pressed can correspond to a closing control command, and a button being pressed can correspond to a breaking control command. Of course, the method of generating the closing control command or the breaking control command is not limited to this.

[0109] Taking the closure control instruction as an example, if a closure control instruction is generated, the processor in the control module 103 can generate a closure control signal in response to the instruction and send it to the drive control module. The drive control module can then generate a closure drive control signal based on the closure control signal and send it to the execution module 102. The execution module 102 can then switch from an open state to a closed state based on the closure drive control signal. For details on the specific control process, please refer to the aforementioned explanations; they will not be repeated here.

[0110] Furthermore, if the user generates a disconnect control command by acting on the human-machine interface module 106, the control module can refer to the control process under abnormal operating state parameters described above to switch the switch system from a closed state to an open state. Specifically, during control, the control module, in response to the disconnect control command, sequentially generates a first control signal, a second control signal, a third control signal, and a fourth control signal, and finally switches the isolating switch from a conducting state to an open state according to the fourth control signal. For details on the specific control process, please refer to the aforementioned explanations, which will not be repeated here.

[0111] By applying the embodiments of this application, the human-computer interaction module 106 can flexibly switch between open and closed states according to the actual application scenario, thereby improving the applicability of the switching system.

[0112] Optionally, the execution module further includes: a heat dissipation module, which is communicatively connected to the control module; a data acquisition module, which is also used to acquire the temperature parameters of the execution module and send them to the control module; and the control module, which is also used to send a heat dissipation control signal to the heat dissipation module if it is determined that the temperature parameters are greater than a preset temperature threshold, so that the target heat dissipation module performs a heat dissipation operation.

[0113] In some embodiments, the heat dissipation module may include a cooling fan, a heat pipe, etc., which are not limited thereto.

[0114] Optionally, the aforementioned acquisition module can also be used to acquire temperature parameters of the execution module (e.g., the copper busbar in the execution module) and send them to the processor in the control module. The processor is also used to compare whether the temperature parameter is greater than a preset temperature threshold. If so, it generates a heat dissipation control signal through the drive control module and sends it to the heat dissipation module. Upon receiving the heat dissipation control signal, the heat dissipation module can perform corresponding heat dissipation operations, such as controlling the cooling fan to work. Of course, the specific heat dissipation method is not limited to this.

[0115] Optionally, the control module is already present in the target service scenario, and the target service scenario has a power business system deployed thereon.

[0116] In some embodiments, the power service system may be an energy storage system, a data center power system, etc., and is not limited thereto. The energy storage system includes energy storage units, and the data center power system includes at least one server. If the power service system is an energy storage system, the load may be the energy storage unit; if the power service system is a data center power system, the load may be the at least one server.

[0117] To better understand this application, an energy storage system is used as an example for explanation. The energy storage unit is a device that stores energy and releases it when needed. Optionally, the energy storage unit can be a battery pack, capacitor, etc., which is not limited here.

[0118] Referring to the above description of the switching system, it can be understood that applying the switching system to energy storage scenarios can achieve safe protection of energy storage units through miniaturized switching systems, giving full play to the advantages of the switching system such as fast response speed, high reliability, and high level of intelligence.

[0119] In an optional implementation, the energy storage unit includes: a battery pack; a data acquisition module, specifically used to acquire the operating status parameters of the battery pack and send them to the control module; the control module is also used to generate battery management parameters based on the operating status parameters of the battery pack.

[0120] This application does not limit the configuration of the battery pack. Optionally, the battery pack may include multiple sub-battery packs connected in parallel, and each sub-battery pack includes multiple battery cells connected in series. Furthermore, this application does not limit the battery attribute parameters such as voltage, capacity, maximum discharge current, charging time, and internal resistance of the battery pack and each sub-battery pack, and these parameters can be flexibly set according to the actual application scenario.

[0121] Depending on the battery pack configuration, the operating parameters of the battery pack may optionally include: the voltage, current, and temperature of the battery pack; the voltage, current, and temperature of the sub-battery pack; and the voltage, current, and temperature of a single battery cell. These parameters are not limited here.

[0122] Optionally, after obtaining the operating status parameters of the battery pack, the control module can generate corresponding battery management parameters according to the battery management strategy. Optionally, the battery management parameters may include, but are not limited to: the static voltage, charging and discharging voltage, charging and discharging current of the battery pack, the battery voltage of the individual battery cells, the temperature rise parameters of the individual battery cells within a preset time period, the real-time remaining capacity of the battery pack, and the life parameters of the battery pack.

[0123] Figure 6 This is a schematic diagram of another switching system provided in an embodiment of this application. In optional implementations, such as... Figure 6 As shown, the above-mentioned switching system also includes: a display module 109, which is communicatively connected to the control module 103; the control module 103 is used to control the display module to display the working status of the execution module and / or the status management parameters of the load, the working status including: closed state and open state.

[0124] Taking the energy storage scenario as an example, the state management parameters of the load, that is, the state management parameters of the energy storage unit, can optionally be displayed by the display module through the control module, so that the user can intuitively know the relevant battery parameters of the energy storage module.

[0125] In addition, the display module can also synchronously display the working status of the execution module. The working status of the execution module can be consistent with the working status of the disconnecting switch. If the disconnecting switch is in the open state, it means that the working status of the execution module is open. If the disconnecting switch is in the closed state, it means that the working status of the execution module is closed. It can be understood that since the disconnecting switch can play a role in electrical isolation, the safety of the operator can be ensured when the status of the disconnecting switch is referred to for maintenance.

[0126] Figure 7 This is a flowchart illustrating a control method for a switching system provided in an embodiment of this application.

[0127] The control method is applied to the control module of the switching system in any of the aforementioned embodiments, such as... Figure 7 As shown, the method includes:

[0128] Step 201: Receive the operating status parameters of the circuit where the load is located from the acquisition module.

[0129] Step 202: Based on the operating status parameters of the circuit where the load is located, if it is determined that a disconnection control signal or a closing control signal is to be generated, the disconnection control signal or the closing control signal is sent to the execution module so that the disconnection operation or the closing operation is performed through the execution module.

[0130] By applying the embodiments of this application, the introduction of a fast mechanical switch enables the switching system provided by the embodiments of this application to have a faster response speed, higher reliability, longer service life, and higher level of intelligence. In addition, since this application does not require the introduction of components such as fuses and contactors, the switching system can be miniaturized, thereby improving the flexibility of the setup.

[0131] Optionally, the control module is specifically used to determine whether the operating status parameters are abnormal based on the operating status parameters of the circuit where the load is located; if so, it generates a first control signal to cause the semiconductor power device to switch from an off state to an on state according to the first control signal; after the semiconductor power device switches to the on state, it generates a second control signal to cause the fast mechanical switch to switch from a closed state to an open state according to the second control signal; after the fast mechanical switch switches to the open state, it generates a third control signal to cause the semiconductor power device to switch from an on state to an off state according to the third control signal.

[0132] After the semiconductor power device switches to the off state, a fourth control signal is generated so that the disconnecting switch switches from the on state to the off state according to the fourth control signal.

[0133] Optionally, the control module is also configured to generate a fifth control signal in response to a closing control command, so that the disconnecting switch switches from an open state to a closed state according to the fifth control signal;

[0134] After the disconnector switches from the open state to the on state, a sixth control signal is generated to cause the semiconductor power device to switch from the open state to the on state according to the sixth control signal;

[0135] When a semiconductor power device switches from an off state to an on state, a seventh control signal is generated to cause a fast mechanical switch to switch from an off state to a closed state according to the seventh control signal;

[0136] After the fast mechanical switch switches from the open state to the closed state, an eighth control signal is generated to switch the semiconductor power device from the closed state to the open state.

[0137] For a detailed explanation of the above methods, please refer to the aforementioned relevant content, which will not be repeated here. By applying the embodiments of this application, the switching system provided in this application can flexibly switch between open and closed states, exhibiting fast response speed and high reliability.

[0138] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0139] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0140] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0141] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application. It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need further definition and explanation in subsequent figures. The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A switching system, characterized in that, include: The system includes a data acquisition module, an execution module, and a control module. The data acquisition module and the execution module are communicatively connected to the control module. The input terminal of the execution module is connected to the power supply terminal, and the output terminal of the execution module is connected to the load. The execution module includes a fast mechanical switch. The acquisition module is used to acquire the operating status parameters of the circuit where the load is located and send them to the control module; The control module is used to send a disconnection control signal or a closure control signal to the execution module if it determines that a disconnection control signal or a closure control signal is to be generated based on the operating status parameters of the circuit where the load is located. The execution module is configured to switch from a closed state to a closed state according to the disconnection control signal, or to switch from a closed state to a closed state according to the closing control signal.

2. The switching system according to claim 1, characterized in that, The execution module includes at least one sub-execution module, each sub-execution module including a series-connected isolating switch and a hybrid switch, the hybrid switch including: a semiconductor power device, a fast mechanical switch, and an energy absorption module connected in parallel; or... Each of the sub-execution modules includes a fast mechanical switch and a hybrid switch connected in parallel. The hybrid switch includes an isolating switch and a sub-module connected in series. The sub-module includes a semiconductor power device and an energy absorption module connected in parallel. The fast mechanical switch is used to perform closing or opening operations according to the closing control signal or opening control signal sent by the control module; The semiconductor power device is used to perform current commutation when the fast mechanical switch is turned off; The energy absorption module is used to absorb or release the residual energy corresponding to the fast mechanical switch being disconnected and / or release the overvoltage generated when the semiconductor power device is disconnected. The disconnecting switch is used to achieve electrical isolation when the semiconductor power device is turned off or closed.

3. The switching system according to claim 2, characterized in that, The energy absorption module includes an RC branch and a metal oxide varistor (MOV) branch; the RC branch includes a resistor and a capacitor connected in series; the MOV branch is used to release the overvoltage generated when the semiconductor power device is disconnected or to release the remaining energy corresponding to the fast mechanical switch being disconnected; the RC branch is used to absorb the remaining energy corresponding to the fast mechanical switch being disconnected.

4. The switching system according to claim 2, characterized in that, The control module is specifically used to determine whether the operating status parameters are abnormal based on the operating status parameters of the circuit where the load is located. If so, a first control signal is generated to cause the semiconductor power device to switch from an off state to an on state according to the first control signal; After the semiconductor power device switches to the on state, a second control signal is generated so that the fast mechanical switch switches from the closed state to the open state according to the second control signal; After the fast mechanical switch is switched to the off state, a third control signal is generated so that the semiconductor power device switches from the on state to the off state according to the third control signal; After the semiconductor power device switches to the off state, a fourth control signal is generated so that the disconnecting switch switches from the on state to the off state according to the fourth control signal.

5. The switching system according to claim 2, characterized in that, The control module is further configured to generate a fifth control signal in response to a closing control command, so that the disconnecting switch switches from an open state to a conducting state according to the fifth control signal; After the disconnecting switch switches from the open state to the on state, a sixth control signal is generated to cause the semiconductor power device to switch from the open state to the on state according to the sixth control signal; When the semiconductor power device switches from an off state to an on state, a seventh control signal is generated to cause the fast mechanical switch to switch from an off state to a closed state according to the seventh control signal; After the fast mechanical switch switches from the open state to the closed state, an eighth control signal is generated to switch the semiconductor power device from the closed state to the open state.

6. The switching system according to claim 5, characterized in that, The control module is further configured to generate a ninth control signal when the semiconductor power device switches from an off state to an on state according to the sixth control signal, if a short circuit fault is determined to have occurred based on the operating state parameters of the circuit in which the load is located, so that the semiconductor power device switches from an on state to an off state according to the ninth control signal. After the semiconductor power device switches to the off state, a tenth control signal is generated so that the disconnecting switch switches from the on state to the off state according to the tenth control signal.

7. The switching system according to any one of claims 1-6, characterized in that, The execution module and the control module are connected for communication through a preset interface; The interface type of the preset interface is any one of the following: threaded connection, bayonet connection, locking connection, push-pull connection, or plug-in connection.

8. The switching system according to claim 1, characterized in that, The switching system further includes: a human-machine interaction module, which is communicatively connected to the control module. The human-machine interaction module is used to receive closing control commands or opening control commands and send them to the control module. The control module is configured to generate a closing control signal or a disconnection control signal in response to the closing control command or the disconnection control command, and send the closing control signal or the disconnection control signal to the execution module; The execution module is configured to switch from an open state to a closed state according to the closing control signal, or to switch from a closed state to an open state according to the disconnection control signal.

9. The switching system according to claim 1, characterized in that, The control module is already present in the target service scenario, which has a power business system deployed there.

10. A control method for a switching system, characterized in that, The method, applied to a control module in the switching system according to any one of claims 1-9, comprises: The receiver module collects the operating status parameters of the circuit where the load is located. Based on the operating status parameters of the circuit where the load is located, if it is determined that a disconnection control signal or a closure control signal will be generated, the disconnection control signal or the closure control signal will be sent to the execution module so that the disconnection operation or the closure operation can be performed through the execution module.

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