Nuclear capacitor discharge protection device and power supply system

Abstract

One or more embodiments of the present specification provide a protection device and power supply system for nuclear capacitor discharge, and the protection device may include: a nuclear capacitor protection energy storage element, wherein the positive and negative electrodes of the nuclear capacitor protection energy storage element are respectively connected in parallel to a DC bus between a high-voltage DC power supply and an electrical device through a first circuit and a second circuit; a converter, arranged on the first circuit and the second circuit, for converting the energy storage voltage of the nuclear capacitor protection energy storage element to a minimum DC supply voltage value not lower than the minimum DC supply voltage value of the electrical device, so as to provide backup power during the nuclear capacitor discharge process of the initial energy storage element contained in the high-voltage DC power supply.

Description

Technical Field

[0001] One or more embodiments of the present specification relate to the field of nuclear capacitor discharge technology, and in particular, to a nuclear capacitor discharge protection device and a power supply system. Background Art

[0002] In related technologies, continuous power sources such as HVDC (High-Voltage Direct Current) power supply system and UPS (Uninterruptible Power Supply) power supply system are widely used in computer rooms such as IDC (Internet Data Center) to supply power to power-consuming equipment such as servers in the computer room. Among them, the continuous power supply includes energy storage elements such as batteries; taking batteries as an example, batteries can provide short-term power supply to power-consuming equipment in the computer room in an emergency, thereby achieving continuous power supply to ensure uninterrupted operation of the power-consuming equipment.

[0003] However, during operation, the battery may experience structural aging, performance degradation, etc., which may cause the battery to fail to meet normal usage requirements. It is necessary to perform nuclear capacity discharge (i.e., capacity verification discharge) on the battery to determine the operating status of the battery. Summary of the invention

[0004] In view of this, one or more embodiments of the present specification provide a nuclear capacitor discharge protection device and a power supply system.

[0005] To achieve the above objectives, one or more embodiments of this specification provide the following technical solutions:

[0006] According to a first aspect of one or more embodiments of this specification, a protection device for nuclear capacitor discharge is provided, comprising:

[0007] A core capacity protection energy storage element, wherein the positive and negative electrodes of the core capacity protection energy storage element are respectively connected in parallel to a DC bus between a high-voltage DC power supply and an electrical device through a first circuit and a second circuit;

[0008] The converter is arranged on the first circuit and the second circuit, and is used to convert the energy storage voltage of the core capacity protection energy storage element to a value not lower than the minimum DC supply voltage of the electrical equipment, so as to provide backup power during the process of core capacity discharge of the initial energy storage element contained in the high-voltage DC power supply.

[0009] According to a second aspect of one or more embodiments of this specification, a protection device for nuclear capacitor discharge is provided, comprising:

[0010] A core-capacity protection lithium battery, wherein the positive and negative electrodes of the core-capacity protection lithium battery are detachably connected in parallel to a DC bus between a high-voltage DC power supply and an electrical device through a first circuit and a second circuit respectively;

[0011] The converter is arranged on the first circuit and the second circuit, and is used to convert the energy storage voltage of the core capacity protection lithium battery to a minimum DC supply voltage value not lower than the electrical equipment, so as to provide backup power during the core capacity discharge of the initial energy storage element contained in the high-voltage DC power supply.

[0012] According to a third aspect of one or more embodiments of this specification, a power supply system is provided, including:

[0013] A high-voltage direct current power supply, used to convert high-voltage alternating current into high-voltage direct current, and output it to electrical equipment through a direct current bus, wherein the high-voltage direct current power supply comprises an initial energy storage element;

[0014] The protection device for nuclear capacity discharge as described in the first aspect or the second aspect is used to provide backup electric energy during the process of nuclear capacity discharge of the initial energy storage element.

[0015] According to a fourth aspect of one or more embodiments of this specification, a protection device for nuclear capacitor discharge is provided, comprising:

[0016] A nuclear capacity protection energy storage element, wherein the positive and negative electrodes of the nuclear capacity protection energy storage element are respectively connected in parallel to a transmission bus between an uninterruptible power supply and an inverter through a first circuit and a second circuit, and an output end of the inverter is connected to an electrical device;

[0017] A converter is arranged on the first circuit and the second circuit, and is used to transform the energy storage voltage of the core capacity protection energy storage element, so that after the electric energy output by the core capacity protection energy storage element to the transmission bus is converted into alternating current by the inverter, the alternating voltage output to the electrical equipment is not lower than the minimum alternating current supply voltage value of the electrical equipment, so that the core capacity protection energy storage element can provide backup electric energy during the process of core capacity discharge of the initial energy storage element contained in the uninterruptible power supply.

[0018] According to a fifth aspect of one or more embodiments of this specification, a protection device for nuclear capacitor discharge is provided, comprising:

[0019] A core-capacity protection lithium battery, wherein the positive and negative electrodes of the core-capacity protection lithium battery are detachably connected in parallel to a transmission bus between an uninterruptible power supply and an inverter through a first circuit and a second circuit, respectively, and an output end of the inverter is connected to an electrical device;

[0020] The converter is arranged on the first circuit and the second circuit, and is used to transform the energy storage voltage of the core capacity protection lithium battery, so that after the electric energy output by the core capacity protection lithium battery to the transmission bus is converted into alternating current by the inverter, the alternating current voltage output to the electrical equipment is not lower than the minimum alternating current supply voltage value of the electrical equipment, so that the core capacity protection lithium battery can provide backup electric energy during the process of core capacity discharge of the initial energy storage element contained in the uninterruptible power supply.

[0021] According to a sixth aspect of one or more embodiments of this specification, a power supply system is provided, including:

[0022] An uninterruptible power supply, used to rectify high-voltage alternating current into high-voltage direct current, store the high-voltage direct current into an initial energy storage element, and invert the high-voltage direct current into high-voltage alternating current and output it to an electrical device;

[0023] The protection device for nuclear capacity discharge as described in the fourth aspect or the fifth aspect is used to provide backup electric energy during the process of nuclear capacity discharge of the initial energy storage element.

[0024] According to a seventh aspect of one or more embodiments of this specification, a method for controlling nuclear capacitor discharge is provided, comprising:

[0025] Determine the working state of the initial energy storage element contained in the high voltage DC power supply;

[0026] When in a nuclear capacity discharge state, sending a switching instruction to the converter according to the first aspect, the second aspect or the third aspect, wherein the switching instruction is used to instruct the converter to switch between an on state and an off state;

[0027] Among them, the converter in the turned-on state is used to convert the energy storage voltage of the nuclear capacity protection energy storage element or the nuclear capacity protection lithium battery as described in the first aspect, the second aspect or the third aspect to a minimum DC supply voltage value not lower than the electrical equipment.

[0028] According to an eighth aspect of one or more embodiments of this specification, a method for controlling nuclear capacitor discharge is provided, comprising:

[0029] Determine the working state of the initial energy storage element contained in the uninterruptible power supply;

[0030] When in a nuclear capacity discharge state, sending a switching instruction to the converter according to the fourth aspect, the fifth aspect or the sixth aspect, wherein the switching instruction is used to instruct the converter to switch between an on state and an off state;

[0031] Among them, the converter in the turned-on state is used to transform the energy storage voltage of the nuclear capacity protection energy storage element or the nuclear capacity protection lithium battery as described in the fourth aspect, the fifth aspect or the sixth aspect, so that after the electric energy output by the nuclear capacity protection energy storage element or the nuclear capacity protection lithium battery to the inverter is converted into alternating current, the alternating current voltage output to the electrical equipment is not lower than the minimum alternating current supply voltage value of the electrical equipment.

[0032] According to a ninth aspect of one or more embodiments of this specification, a control device for nuclear capacitor discharge is provided, comprising:

[0033] A determination unit, which determines the working state of the initial energy storage element contained in the high-voltage direct current power supply;

[0034] A sending unit, when in a core capacity discharging state, sends a switching instruction to the converter according to the first aspect, the second aspect or the third aspect, wherein the switching instruction is used to instruct the converter to switch between an on state and an off state;

[0035] Among them, the converter in the turned-on state is used to convert the energy storage voltage of the nuclear capacity protection energy storage element or the nuclear capacity protection lithium battery as described in the first aspect, the second aspect or the third aspect to a minimum DC supply voltage value not lower than the electrical equipment.

[0036] According to a tenth aspect of one or more embodiments of this specification, a control device for nuclear capacitor discharge is provided, comprising:

[0037] A determination unit, which determines the working state of an initial energy storage element contained in the uninterruptible power supply;

[0038] A sending unit, when in a nuclear capacity discharging state, sends a switching instruction to the converter according to the fourth aspect, the fifth aspect or the sixth aspect, wherein the switching instruction is used to instruct the converter to switch between an on state and an off state;

[0039] Among them, the converter in the turned-on state is used to transform the energy storage voltage of the nuclear capacity protection energy storage element or the nuclear capacity protection lithium battery as described in the fourth aspect, the fifth aspect or the sixth aspect, so that after the electric energy output by the nuclear capacity protection energy storage element or the nuclear capacity protection lithium battery to the inverter is converted into alternating current, the alternating current voltage output to the electrical equipment is not lower than the minimum alternating current supply voltage value of the electrical equipment.

[0040] According to an eleventh aspect of one or more embodiments of this specification, a control device for nuclear capacitor discharge is provided, comprising:

[0041] processor;

[0042] a memory for storing processor-executable instructions;

[0043] The processor implements the method as described in the seventh aspect or the eighth aspect by running the executable instructions.

[0044] According to the twelfth aspect of one or more embodiments of the present specification, a computer-readable storage medium is proposed, on which computer instructions are stored. When the instructions are executed by a processor, the steps of the method described in the seventh or eighth aspect are implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 The diagram is a schematic diagram of powering a server based on HVDC provided by an exemplary embodiment.

[0046] Figure 2 A flowchart of a nuclear capacitor discharge is provided by an exemplary embodiment.

[0047] Figure 3 is based on Figure 1 The illustrated embodiment provides a flow chart for realizing emergency power supply during nuclear capacity discharge.

[0048] Figure 4 It is a flow chart of a method for controlling nuclear capacitor discharge provided by an exemplary embodiment.

[0049] Figure 5 This is another schematic diagram of powering a server based on HVDC provided by an exemplary embodiment.

[0050] Figure 6 is based on Figure 5 The illustrated embodiment provides a flow chart for realizing emergency power supply during nuclear capacity discharge.

[0051] Figure 7 The present invention is a schematic diagram of providing power to a server based on a UPS, provided by an exemplary embodiment.

[0052] Figure 8 is based on Figure 7 The illustrated embodiment provides a flow chart for realizing emergency power supply during nuclear capacity discharge.

[0053] Fig. 9 It is a flow chart of another method for controlling nuclear capacitor discharge provided by an exemplary embodiment.

[0054] Fig.10 It is another schematic diagram of powering a server based on a UPS provided by an exemplary embodiment.

[0055] Fig.11 is based on Fig.10 The illustrated embodiment provides a flow chart for realizing emergency power supply during nuclear capacity discharge.

[0056] Fig.12 It is a schematic structural diagram of an electronic device provided by an exemplary embodiment.

[0057] Fig.13 It is a block diagram of a control device for nuclear capacitor discharge provided by an exemplary embodiment.

[0058] Fig.14 It is a block diagram of another control device for nuclear capacitor discharge provided by an exemplary embodiment. DETAILED DESCRIPTION

[0059] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with one or more embodiments of this specification. Instead, they are merely examples of devices and methods consistent with some aspects of one or more embodiments of this specification as detailed in the appended claims.

[0060] It should be noted that: in other embodiments, the steps of the corresponding method are not necessarily performed in the order shown and described in this specification. In some other embodiments, the steps included in the method may be more or less than those described in this specification. In addition, a single step described in this specification may be decomposed into multiple steps for description in other embodiments; and multiple steps described in this specification may be combined into a single step for description in other embodiments.

[0061] This manual takes the power supply solution in the IDC scenario as an example. Figure 1 FIG. 1 is a schematic diagram of a server powered by HVDC according to an exemplary embodiment; Figure 1 As shown, there are two power supply lines for the servers in the IDC room: Line 1 is connected to the mains to achieve AC power supply, and Line 2 is connected to the HVDC power supply system to achieve high-voltage DC power supply.

[0062] The HVDC power supply system may include an HVDC power supply source and a protection device 2 for nuclear capacity discharge. The HVDC power supply source may include Figure 1The transformer, HVDC module, battery pack 11-12, DC bus 10 between HVDC module and server, etc. shown in the figure have the following operating principles: the transformer converts the input voltage into 380V AC; the HVDC module is used to rectify the 380V AC, for example, convert it into 240V high-voltage DC (in other embodiments, it can be rectified into high-voltage DC of other values), and the HVDC module can also realize other functions such as filtering; the HVDC module outputs the above-mentioned high-voltage DC through the DC bus 10, part of which is used to drive the operation of the server and the other part is used to charge the battery pack 11-12. Then, when the HVDC module or other structures of the HVDC power supply system are abnormal, the battery pack 11-12 can be used as backup power to supply power to the server to ensure uninterrupted operation of the server.

[0063] When the HVDC power supply system includes battery packs 11-12, the battery packs 11-12 can be backed up by each other, so that when the battery pack 11 is abnormal, the battery pack 12 supplies power to the server, or when the battery pack 12 is abnormal, the battery pack 11 supplies power to the server. Of course, the HVDC power supply system can also include a larger number of battery packs; or, in the case of lower reliability requirements, it can even include only a single battery pack. Among them, the battery packs 11-12 are the initial energy storage elements in the HVDC power supply system, and the number of batteries contained in each battery pack can be one or more, and the number of batteries can be determined based on factors such as the battery capacity and the total capacity required to be achieved by the battery packs 11-12, and this specification does not limit this.

[0064] When the battery pack 11-12 is first added to the HVDC power supply system, it is necessary to discharge the battery pack 11-12 to determine the health of the battery pack 11-12, the power support in the event of power supply abnormalities, etc. At the same time, as the use time increases or the number of charge and discharge cycles increases, the health of the battery pack 11-12 will continue to decline, and it is necessary to determine the actual health of the battery pack 11-12 through discharge, so as to promptly discover and resolve potential safety risks. In addition, when the battery pack 11-12 is composed of lead-acid batteries, lead sulfate crystals may gradually form on the surface of the plate, which may block the micropores of the plate and hinder the penetration of the electrolyte, thereby increasing the internal resistance of the battery and reducing the battery capacity. Therefore, discharge can also activate the plate and restore the battery capacity.

[0065] Combine the following Figure 2 Describe the core capacity discharge process of the battery pack 11-12; wherein, Figure 2 A flowchart of a nuclear capacitor discharge is provided by an exemplary embodiment. Figure 2The core capacity discharge logic shown is applied to a controller included in the HVDC power supply system, and the controller can control the output voltage of the HVDC module by measuring relevant parameters to achieve core capacity discharge of the battery group 11-12. Figure 2 As shown, the process of nuclear capacitor discharge may include the following steps:

[0066] Step 202, start the core capacity discharge procedure.

[0067] In one embodiment, the controller can start the core capacity discharge program according to the start instruction initiated by the user, thereby realizing the core capacity discharge operation of the battery packs 11-12. In other embodiments, the controller can also automatically start the core capacity discharge program according to the start time or core capacity discharge cycle preset by the user.

[0068] Step 204, measuring U11-U12, I11-I12.

[0069] In one embodiment, U11 represents the real-time voltage of the battery group 11, and U12 represents the real-time voltage of the battery group 12. By measuring the voltages U11 and U12, the output voltage Uh of the HVDC module can be controlled, thereby realizing the core capacity discharge of the battery group 11-12. I11 represents the real-time current of the battery group 11, and I12 represents the real-time current of the battery group 12, which is used to calculate the discharge amount in the subsequent process.

[0070] Step 206, compare the voltages U11 and U12 with the preset voltage threshold Ua; when U11 ≥ Ua or U12 ≥ Ua, proceed to step 208, otherwise proceed to step 210B.

[0071] In one embodiment, the voltage threshold Ua is the core capacity discharge cut-off voltage of the battery pack 11-12, that is, when the real-time voltage U11-U12 of the battery pack 11-12 drops to the core capacity discharge cut-off voltage, it indicates that the core capacity discharge is completed. The value of the core capacity discharge cut-off voltage should ensure that the battery pack 11-12 does not over-discharge to prevent damage to the battery pack 11-12. The value of the voltage threshold Ua is negatively correlated with the core capacity discharge ratio of the battery pack 11-12, that is, the higher the core capacity discharge ratio, the lower the voltage threshold Ua, and the greater the core capacity discharge of the battery pack 11-12. When the value of U11 or U12 is not lower than the voltage threshold Ua, it indicates that the core capacity discharge of the battery pack 11-12 has not yet ended.

[0072] Step 208 , when the discharge time T is less than the preset time threshold T0 , proceed to step 210A, otherwise proceed to step 210B.

[0073] In one embodiment, the preset time threshold T0 may be positively correlated with the core capacity discharge ratio of the battery pack 11-12; or, the preset time threshold T0 may be set by the user based on other factors to ensure that the battery pack 11-12 will not be over-discharged and damaged. For example, the preset time threshold T0 may be 20 minutes.

[0074] Step 210A, controlling the output voltage Uh of the HVDC module to decrease by a step length ΔU, and calculating the discharge amount.

[0075] In one embodiment, the output voltage Uh of the HVDC module is controlled to be reduced so that the voltage value Uh on the DC bus 10 drops to be lower than the voltage U11-U12 of the battery group 11-12, so that the battery group 11-12 performs reverse feeding to the DC bus 10, that is, the core capacity discharge of the battery group 11-12 is realized.

[0076] Among them, since the battery packs 11-12 are always connected to the DC bus 10 during the core capacity discharge process, the electric energy released by the battery packs 11-12 can be fed to the server through the DC bus 10 to power the server, thereby avoiding the waste of electric energy. In other words, the online core capacity discharge of the battery packs 11-12 can be realized in this specification, rather than the offline core capacity discharge, so there is no need to add additional loads that consume electric energy and corresponding heat dissipation equipment, which can simplify the system structure, reduce maintenance costs, and reduce space occupancy.

[0077] Step 210B, terminate the core capacity discharge procedure.

[0078] In one embodiment, when the voltage U11-U12 of the battery group 11-12 drops below the preset voltage threshold Ua, or when the discharge time T exceeds the preset time threshold T0, the controller can control to terminate the core capacity discharge procedure, and the HVDC module will not continue to reduce the output voltage Uh to guide the discharge operation of the battery group 11-12. In fact, after terminating the core capacity discharge procedure, the HVDC module can restore the output voltage Uh to a normal operating voltage, such as the above-mentioned 240V or other values.

[0079] In one embodiment, the controller can generate corresponding voltage change curves and current change curves according to the voltages U11, U12 and currents I11, I12 of the battery packs 11-12 measured in the above steps, and perform integral calculations based on the voltage change curves and the current change curves to accurately obtain the discharge amount of the battery packs 11-12 during the core capacity discharge process, thereby determining the health of the battery packs 11-12.

[0080] During the core capacity discharge of the battery packs 11-12, the HVDC power supply system will not be able to provide reliable backup power to the server. If the power supply of line 1 fails, the server may be powered off and shut down. Therefore, the present specification can provide additional backup power during the core capacity discharge process by providing the above-mentioned core capacity discharge protection device 2 to ensure that the server can achieve uninterrupted operation.

[0081] like Figure 1 As shown, the protection device 2 for core capacity discharge may include: a core capacity protection battery pack 21 and a converter 22. Among them, the positive and negative poles of the core capacity protection battery pack 21 are respectively connected in parallel to the DC bus 10 through the first line L1 and the second line L2; and the converter 22 is arranged on the first line L1 and the second line L2, and is used to convert the battery pack voltage of the core capacity protection battery pack 21 and output it to the DC bus 10. The core capacity protection battery pack 21 belongs to the core capacity protection energy storage element in the protection device 2 for core capacity discharge. The number of batteries contained in the core capacity protection battery pack 21 can be one or more, and the number of batteries can be determined according to factors such as battery capacity and the total capacity required to be achieved by the core capacity protection battery pack 21, and this specification does not limit this.

[0082] By providing the core capacity protection battery pack 21, during the core capacity discharge process of the battery pack 11-12, even if a power supply abnormality occurs in the line 1, the core capacity protection battery pack 21 can provide backup power to ensure the uninterrupted operation of the server. Similarly, in addition to the core capacity discharge process, when the user replaces a single battery in the battery pack 11-12, the core capacity protection battery pack 21 can also temporarily replace the battery pack 11-12 and provide backup power to the server accordingly.

[0083] The protection device 2 for core capacity discharge can be permanently connected to the DC bus 10; or, the protection device 2 for core capacity discharge is connected to the DC bus 10 in a detachable manner, so that the user can connect the protection device 2 for core capacity discharge to the DC bus 10 only when needed (such as when performing core capacity discharge on the battery pack 11-12 or replacing the battery), and the protection device 2 for the core capacity direction can be removed immediately after completion. Accordingly, when a detachable structure is adopted, the core capacity protection battery pack 21 can adopt lithium batteries or other types of batteries with high specific energy, which can reduce the weight and volume of the core capacity protection battery pack 21 and facilitate transportation and use. The converter 22 can support the conversion function of alternating current, so that the converter 22 can be connected to the mains to charge the core capacity protection battery pack 21, so as to facilitate the charging operation after the core capacity protection battery pack 21 is disconnected from the DC bus 10.

[0084] The server has a minimum DC supply voltage value Ub, that is, the voltage value Uh of the DC bus 10 should not be less than the minimum DC supply voltage value Ub, otherwise the server will lose power and cannot work normally. Therefore, the converter 22 can convert the power of the core capacity protection battery pack 21 and output it to the DC bus 10 to further provide it to the server; the core capacity discharge protection device 2 can be based on Figure 3 The process shown in the figure can realize emergency power supply under abnormal conditions. Figure 3 As shown, the emergency power supply process may include the following steps:

[0085] Step 302 , measuring the voltage value Uh on the DC bus 10 .

[0086] In one embodiment, the measurement point of the voltage value Uh may be located at any position on the DC bus 10 , such as the connection between the protection device 2 for nuclear capacitor discharge and the DC bus 10 .

[0087] Step 304: When it is detected that Uh is less than the lowest DC supply voltage value Ub, the converter 22 is triggered to start.

[0088] In one embodiment, when Uh<Ub, it indicates that the DC bus 10 cannot normally provide backup power to the server, for example, the battery packs 11-12 are in the process of core capacity discharge or battery replacement, or other abnormal conditions occur in the HVDC power supply, so the corresponding backup power can be provided by the core capacity discharge protection device 2.

[0089] In one embodiment, the numerical relationship between Uh and Ub may be determined by an analog circuit inside the converter 22 , so that the converter 22 is triggered to start when Uh<Ub.

[0090] In one embodiment, the protection device 2 for core capacity discharge may include a controller, which is used to send a switching instruction to the converter 22 to instruct the converter 22 to switch between the on state and the off state. For example, after obtaining the values ​​of Uh and Ub respectively, the controller can send a switching instruction to the converter 22 when it is determined that Uh<Ub, so that the converter 22 switches from the off state to the on state. The controller involved at this time can be the same controller as the controller in the above-mentioned process of controlling the core capacity discharge; or, the two can be two independent controllers, for example, the first controller controls the above-mentioned core capacity discharge process, and the second controller controls the state switching of the converter 22.

[0091] Step 306 , the converter 22 sets the output voltage U22 =Ub of the protection device 2 for core capacity discharge.

[0092] In one embodiment, after startup, the converter 22 converts the battery pack voltage U21 of the core capacity protection battery pack 21 so that the converted output voltage U22 = Ub. Accordingly, the voltage value Uh on the DC bus 10 = U22 = Ub, which meets the working voltage requirement of the server, so that the server can achieve uninterrupted operation.

[0093] It should be noted that the core capacity protection battery pack 21 often experiences a large voltage drop rapidly during the discharge process. Therefore, after being converted by the converter 22, the value of the output voltage U22 can be stabilized to Ub, ensuring continuous and stable DC power supply to the server.

[0094] Step 308: When it is detected that Uh is greater than the lowest DC supply voltage value Ub, the converter 22 is triggered to shut down.

[0095] In one embodiment, the normal supply voltage value of the HVDC power supply is often greater than the lowest DC supply voltage value Ub, for example, the normal supply voltage value is 240-270 V, and the lowest DC supply voltage value Ub is 210 V. Therefore, when Uh>Ub, it indicates that the HVDC power supply has resumed normal power supply (for example, the battery group 11-12 has completed the core capacity discharge), and the converter 22 can be triggered to terminate the discharge process of the core capacity protection battery group 21, and the battery group 11-12 provides backup power.

[0096] As mentioned above, the protection device 2 for nuclear capacity discharge may include a controller, and based on the controller, the working state of the converter 22 is controlled. The control process may include: Figure 4 The following steps are shown:

[0097] Step 402: Determine the working state of the initial energy storage element contained in the high-voltage direct current power supply.

[0098] In such Figure 1 In the protection device 2 for core capacity discharge shown, the initial energy storage element may include the above-mentioned battery packs 11-12. The working state of the initial energy storage element may include the core capacity discharge state and other states.

[0099] Step 404: When the core capacity is in the discharge state, a switching instruction is sent to the converter, wherein the switching instruction is used to instruct the converter to switch between the on state and the off state.

[0100] by Figure 1 Taking the shown nuclear capacity discharge protection device 2 as an example, the converter 22 in the turned-on state is used to convert the energy storage voltage of the nuclear capacity protection battery pack 21 as mentioned above to a minimum DC supply voltage value not lower than the power-consuming equipment (such as a server).

[0101] For example, when the voltage of the DC bus 10 is lower than the minimum DC supply voltage value, the switching instruction is used to instruct the converter 22 to switch from the off state to the on state; and, when the voltage of the DC bus 10 is not lower than the minimum DC supply voltage value, the switching instruction is used to instruct the converter 22 to switch from the on state to the off state.

[0102] exist Figure 1 On the basis of the embodiment shown, the protection device 2 for core capacity discharge may further include: a unidirectional conduction circuit connected between the DC bus 10 and the core capacity protection battery pack 21, which can realize unidirectional conduction when the power supply of the server is abnormal, so as to trigger the converter 22 to switch from the off state to the on state; wherein the battery pack voltage U21 of the core capacity protection battery pack 21 is not lower than the minimum DC power supply voltage value Ub. For example, Figure 5 FIG. 1 is another schematic diagram of powering a server based on HVDC provided by an exemplary embodiment; Figure 5 As shown, the above-mentioned unidirectional conducting circuit may include: a first unidirectional conducting device connected in parallel to the first line L1, and a second unidirectional conducting device connected in parallel to the second line L2. For example, diode D1 and diode D2 are used as examples for explanation here. Of course, the unidirectional conducting device may also include silicon controlled rectifiers (SCR), etc., and this specification does not limit this.

[0103] The two ends of the diode D1 are respectively connected to the two sides of the converter 22, which is equivalent to being connected to the positive electrode of the core capacity protection battery pack 21 and the DC bus 10 across the converter 22, so as to realize the unidirectional conduction from the positive electrode of the core capacity protection battery pack 21 to the DC bus 10; the two ends of the diode D2 are respectively connected to the two sides of the converter 22, which is equivalent to being connected to the negative electrode of the core capacity protection battery pack 21 and the DC bus 10 across the converter 22, so as to realize the unidirectional conduction from the DC bus 10 to the negative electrode of the core capacity protection battery pack 21.

[0104] Based on the unidirectional conduction characteristics of the diode, the state switching of the converter 22 can be controlled by combining the conduction of the diodes D1-D2. Figure 6 To elaborate:

[0105] Step 602 , measuring the voltage value Uh on the DC bus 10 .

[0106] In one embodiment, reference may be made to the aforementioned step 302, which will not be described in detail herein.

[0107] Step 604 , when the voltage value Uh ≥ the lowest DC supply voltage value Ub, proceed to step 606 , otherwise proceed to step 608 .

[0108] Step 606 , when the current value I2 of the diode D1 is greater than the preset conduction current value Im, proceed to step 608 , otherwise return to step 602 .

[0109] In one embodiment, the preset conduction current value Im is the current value when the diode D1 is turned on, which can be set according to the characteristics of the diode D1 or obtained through pre-testing.

[0110] Step 608, triggering the converter 22 to start.

[0111] In one embodiment, when the HVDC is supplying power normally, the voltage value Uh on the DC bus 10 is higher than the lowest DC supply voltage value Ub, that is, the condition Uh≥Ub is satisfied. When the battery pack voltage U21 of the core capacity protection battery pack 21 is not higher than the lowest normal output voltage value of the high voltage DC power supply, for example, the normal output voltage range of the high voltage DC power supply is 240-270V, then the lowest normal output voltage value is 240V, and the battery pack voltage U21 is not higher than 240V, for example, the battery pack voltage U21=215V when the core capacity protection battery pack 21 is fully charged, so that when the HVDC is supplying power normally, U21<Uh must be satisfied, so that the diodes D1-D2 cannot be turned on, thereby not satisfying the condition I2>Im, and the converter 22 will not be triggered to start, so that the normal power supply process of the core capacity protection battery pack 21 and the HVDC power supply is decoupled, and only in abnormal situations will it participate in power supply, avoiding waste of power energy of the core capacity protection battery pack 21.

[0112] When the HVDC power supply is discharged or abnormal due to the control core capacity, the voltage value Uh on the DC bus 10 may drop gradually or rapidly. Then, when the voltage value Uh drops to less than the battery pack voltage U21, the diode D1-D2 will be turned on under the pressure difference, so that: on the one hand, the condition I2>Im is satisfied, and on the other hand, due to the conduction of the diode D1-D2, the voltage value Uh of the DC bus 10 will not continue to drop, but will be set to Uh=U21 (actually slightly smaller than U21, there is a voltage difference caused by the diode, such as 0.7V)≥Ub, so that the converter 22 can be triggered to start. Here and Figure 3 Similar to the illustrated embodiment, the converter 22 can implement the judgment of the above conditions through a built-in analog circuit, or through a controller, which will not be described in detail here.

[0113] Although the above text uses the case of "the battery pack voltage U21 is not higher than the lowest normal output voltage value of the high-voltage DC power supply" as an example, in fact: even if the battery pack voltage U21 is higher than the lowest normal output voltage value of the high-voltage DC power supply, it can still ensure that the diodes D1-D2 are turned on when the high-voltage DC power supply is abnormal, thereby triggering the converter 22 to start, so that the core capacity protection battery pack 21 provides backup power.

[0114] In addition, when it is detected in step 604 that Uh<Ub, it indicates that the DC bus 10 can no longer supply power normally. At this time, there is no need to determine the value of the current I2, and the converter 22 can be directly triggered to start and supply power.

[0115] Step 610 , the converter 22 sets the output voltage U22 =Ub of the protection device 2 for core capacitance discharge.

[0116] In one embodiment, by setting the output voltage U22 to Ub, the voltage value Uh on the DC bus 10 changes to be equal to the value of the output voltage U22, that is, Uh=U22=Ub.

[0117] In one embodiment, the diodes D1-D2 are used to trigger the state switching of the converter 22, and the converter 22 subsequently outputs electric energy to the DC bus 10, rather than directly outputting electric energy through the diodes D1-D2. The reason is that the core capacity protection battery pack 21 often quickly experiences a large voltage drop during the discharge process. If the diodes D1-D2 are directly used to output electric energy, the situation of Uh>U21 may occur periodically, causing the diodes D1-D2 to be cut off and unable to transmit power to the DC bus 10 normally. The converter 22 can stably convert the electric energy of the core capacity protection battery pack 21 into U22=Ub, and will not be affected by the battery voltage drop, thereby ensuring the stable output of DC power to the DC bus 10 and ensuring that the server can run uninterruptedly.

[0118] Step 612 , when the voltage value Uh on the DC bus 10 recovers to be higher than the preset voltage upper limit Uc, proceed to step 614 .

[0119] Step 614, triggering the converter 22 to shut down.

[0120] In one embodiment, the preset voltage upper limit Uc is not lower than the maximum battery pack voltage of the core capacity protection battery pack 21, that is, the value of the battery pack voltage U21 when the core capacity protection battery pack 21 is in a fully charged state, which can ensure that the recovery of the voltage value Uh on the DC bus 10 is caused by the high-voltage DC power supply restoring normal power supply, thereby avoiding misjudgment and causing the DC bus 10 to be unable to supply power to the server normally. For example, when the maximum value of the battery pack voltage U21 is 215V, the preset voltage upper limit Uc can be assigned to 235V=U21+20V.

[0121] In the above embodiments, the processing scheme under the nuclear capacity discharge scenario is mainly described for the power supply system of the "mains power + HVDC" architecture; in addition, the technical scheme of this specification can also be applied to the power supply system of the "mains power + UPS" architecture, which will be described in detail below.

[0122] Let’s take the power supply solution in the IDC scenario as an example. Figure 7 FIG. 1 is a schematic diagram of a UPS-based power supply to a server provided by an exemplary embodiment; Figure 7 As shown, there are two power supply lines for the servers in the IDC computer room: Line 1 is connected to the mains to achieve AC power supply, and Line 2 is connected to the UPS-based power supply system to achieve AC power supply.

[0123] The UPS power supply system may include a UPS power supply and a protection device 8 for core capacity discharge. The UPS power supply may include Figure 7 The transformer, rectifier, battery pack 71-72, inverter, transmission bus 70 between the rectifier and the inverter, etc. shown in the figure have the following operating principles: the transformer converts the input voltage into 380V AC; the rectifier is used to rectify the 380V AC, for example, into 240V high-voltage DC (in other embodiments, it can be rectified into high-voltage DC of other values), and can also realize other functions such as filtering; the rectifier outputs the above-mentioned high-voltage DC through the transmission bus 70, a part of which is converted into AC by the inverter and used to drive the operation of the server, and the other part is used to charge the battery pack 71-72. Then, when other structures of the UPS power supply system are abnormal, the inverter can convert the backup power provided by the battery pack 71-72 into AC and output it to the server to ensure uninterrupted operation of the server.

[0124] For the description of the battery pack 71-72, please refer to Figure 1 The battery pack 11-12 shown; at the same time, the Figure 2 In the manner shown, the battery packs 71-72 are discharged to the core capacity, which will not be described in detail here. In the process of the battery packs 71-72 being discharged to the core capacity, the UPS power supply system will not be able to provide reliable backup power to the server. If the power supply of line 1 fails, the server may be powered off and shut down. Therefore, this specification can provide additional backup power during the process of core capacity discharge by providing the above-mentioned protection device 8 for core capacity discharge to ensure that the server can achieve uninterrupted operation.

[0125] like Figure 7As shown, the protection device 8 for core capacity discharge may include: a core capacity protection battery pack 81 and a converter 82. Among them, the positive and negative poles of the core capacity protection battery pack 81 are respectively connected in parallel to the transmission bus 70 through the first line L1' and the second line L2'; and the converter 82 is arranged on the first line L1' and the second line L2', and is used to convert the battery pack voltage of the core capacity protection battery pack 81 and output it to the transmission bus 70. The core capacity protection battery pack 81 belongs to the core capacity protection energy storage element in the protection device 8 for core capacity discharge. The number of batteries contained in the core capacity protection battery pack 81 can be one or more, and the number of batteries can be determined according to factors such as battery capacity and the total capacity required to be achieved by the core capacity protection battery pack 81, and this specification does not limit this.

[0126] By providing the core capacity protection battery pack 81, during the core capacity discharge process of the battery packs 71-72, even if a power supply abnormality occurs in line 1, the core capacity protection battery pack 81 can provide backup power to ensure uninterrupted operation of the server. Similarly, in addition to the core capacity discharge process, when the user replaces a single battery in the battery packs 71-72, the core capacity protection battery pack 81 can also temporarily replace the battery packs 71-72 and provide backup power to the server accordingly.

[0127] The protection device 8 for core capacity discharge can be permanently connected to the transmission bus 70; or, the protection device 8 for core capacity discharge is connected to the transmission bus 70 in a detachable manner, so that the user can connect the protection device 8 for core capacity discharge to the transmission bus 70 only when needed (such as when performing core capacity discharge on the battery pack 71-72 or replacing the battery), and the protection device 8 in the core capacity direction can be removed immediately after completion. Accordingly, when a detachable structure is adopted, the core capacity protection battery pack 81 can adopt lithium batteries or other types of batteries with high specific energy, which can reduce the weight and volume of the core capacity protection battery pack 81 and facilitate transportation and use. The converter 82 can support the conversion function of alternating current, so that the converter 82 can be connected to the mains to charge the core capacity protection battery pack 81, thereby facilitating the charging operation after the core capacity protection battery pack 81 is separated from the transmission bus 70.

[0128] Among them, the server has a minimum AC power supply voltage value, so the voltage value Uh' on the transmission bus 70 should not be less than the minimum DC power supply voltage value Ub', so that the AC voltage converted and output to the server through the inverter is not less than the above-mentioned minimum AC power supply voltage value, otherwise the server will lose power and cannot work normally. Therefore, the converter 82 can convert the electric energy of the core capacity protection battery pack 81 and output it to the transmission bus 70, so that it can be converted into AC power through the inverter and provided to the server. Accordingly, the protection device 8 of the core capacity discharge can adopt Fig. 9 The process shown in the figure can realize emergency power supply under abnormal conditions. Fig. 9As shown, the emergency power supply process may include the following steps:

[0129] Step 802 , measuring the voltage value Uh′ on the transmission bus 70 .

[0130] In one embodiment, the measurement point of the voltage value Uh′ may be located at any position on the transmission bus 70 , such as the connection between the protection device 8 of the nuclear capacitor discharge and the transmission bus 70 .

[0131] Step 804: When it is detected that Uh' is less than the lowest DC supply voltage value Ub', the converter 82 is triggered to start.

[0132] In one embodiment, when Uh'<Ub', it indicates that the electric energy provided by the transmission bus 70 to the inverter cannot meet the normal power demand of the server after conversion, for example, the battery packs 71-72 are in the process of core capacity discharge or battery replacement, or other abnormal conditions occur in the UPS power supply, so the corresponding backup power can be provided by the core capacity discharge protection device 8.

[0133] In one embodiment, the numerical relationship between Uh′ and Ub′ can be determined by an analog circuit inside the converter 82 , so that the converter 82 is triggered to start when Uh′<Ub′.

[0134] In one embodiment, the protection device 8 for core capacity discharge may include a controller, which is used to send a switching instruction to the converter 82 to instruct the converter 82 to switch between the on state and the off state. For example, after obtaining the values ​​of Uh' and Ub' respectively, the controller can send a switching instruction to the converter 82 when it is determined that Uh'<Ub', so that the converter 82 switches from the off state to the on state. The controller involved at this time can be the same controller as the controller in the above text that controls the core capacity discharge process; or, the two can be two independent controllers, for example, the first controller controls the above-mentioned core capacity discharge process, and the second controller controls the state switching of the converter 82.

[0135] Step 806 , the converter 82 sets the output voltage U82 =Ub′ of the protection device 8 for core capacity discharge.

[0136] In one embodiment, after startup, the converter 82 converts the battery pack voltage U81 of the core capacity protection battery pack 81 so that the converted output voltage U82 = Ub'. Accordingly, the voltage value Uh' on the transmission bus 70 = U82 = Ub', so that the AC voltage converted and output by the inverter can meet the working voltage requirement of the server, so that the server can achieve uninterrupted operation.

[0137] It should be noted that the core capacity protection battery pack 81 often experiences a large voltage drop rapidly during the discharge process. Therefore, after being converted by the converter 82, the output voltage U82 can be stabilized to Ub', ensuring continuous and stable power supply to the server via the inverter.

[0138] Step 808: When it is detected that Uh' is greater than the lowest DC supply voltage value Ub', the converter 82 is triggered to shut down.

[0139] In one embodiment, the normal supply voltage value of the UPS power supply is often greater than the minimum DC supply voltage value Ub', for example, the normal supply voltage value is 240-270V, and the minimum DC supply voltage value Ub' is 210V. Therefore, when Uh'>Ub', it indicates that the UPS power supply has resumed normal power supply (for example, the battery pack 71-72 has completed the core capacity discharge), and the converter 82 can be triggered to terminate the discharge process of the core capacity protection battery pack 81, and the battery pack 71-72 provides backup power.

[0140] As mentioned above, the protection device 8 for nuclear capacity discharge may include a controller, and based on the controller, the working state of the converter 82 is controlled. The control process may include: Fig. 9 The following steps are shown:

[0141] Step 902, determining the working state of the initial energy storage element contained in the uninterruptible power supply.

[0142] In such Figure 7 In the protection device 8 for core capacity discharge shown, the initial energy storage element may include the above-mentioned battery packs 71-72. The working state of the initial energy storage element may include the core capacity discharge state and other states.

[0143] Step 904: When the core capacity is in a discharging state, a switching instruction is sent to the converter, wherein the switching instruction is used to instruct the converter to switch between an on state and an off state.

[0144] by Figure 7 Taking the nuclear capacity discharge protection device 8 shown as an example, the converter 22 in the turned-on state is used to transform the energy storage voltage of the nuclear capacity protection battery pack 81 as mentioned above, so that after the electric energy output by the nuclear capacity protection energy storage element 81 to the inverter is converted into AC power, the AC voltage output to the electrical equipment (such as a server) is not lower than the minimum AC power supply voltage value of the electrical equipment.

[0145] exist Figure 7On the basis of the embodiment shown, the protection device 8 for core capacity discharge may further include: a unidirectional conduction circuit connected between the transmission bus 70 and the core capacity protection battery pack 81, which can realize unidirectional conduction when the power supply of the server is abnormal, so as to trigger the converter 82 to switch from the closed state to the open state; wherein the battery pack voltage U81 of the core capacity protection battery pack 81 is not lower than the minimum DC power supply voltage value Ub'. For example, Fig.10 FIG. 1 is another schematic diagram of powering a server based on a UPS provided by an exemplary embodiment; Fig.10 As shown, the above-mentioned unidirectional conducting circuit may include: a first unidirectional conducting device connected in parallel to the first line L1', and a second unidirectional conducting device connected in parallel to the second line L2'. For example, diode D1' and diode D2' are used as examples for explanation here. Of course, the unidirectional conducting devices may also include thyristors, etc., and this specification does not limit this.

[0146] The two ends of the diode D1' are respectively connected to the two sides of the converter 82, which is equivalent to being connected to the positive electrode of the core capacity protection battery group 81 and the transmission bus 70 across the converter 82, so as to realize the unidirectional conduction from the positive electrode of the core capacity protection battery group 81 to the transmission bus 70; the two ends of the diode D2' are respectively connected to the two sides of the converter 82, which is equivalent to being connected to the negative electrode of the core capacity protection battery group 81 and the transmission bus 70 across the converter 82, so as to realize the unidirectional conduction from the transmission bus 70 to the negative electrode of the core capacity protection battery group 81.

[0147] Based on the unidirectional conduction characteristics of the diode, the state switching of the converter 82 can be controlled by combining the conduction of the diodes D1'-D2'. Fig.11 To elaborate:

[0148] Step 1102 , measuring the voltage value Uh′ on the transmission bus 70 .

[0149] In one embodiment, reference may be made to the aforementioned step 802, which will not be described in detail herein.

[0150] Step 1104 , when the voltage value Uh′≥ the lowest DC supply voltage value Ub′, proceed to step 1106 , otherwise proceed to step 1108 .

[0151] Step 1106 , when the current value I8 of the diode D1 ′ is greater than the preset conduction current value Im, proceed to step 1108 , otherwise return to step 1102 .

[0152] In one embodiment, the preset conduction current value Im is the current value when the diode D1 ′ is turned on, which can be set according to the characteristics of the diode D1 ′ or obtained through pre-testing.

[0153] Step 1108, triggering the converter 82 to start.

[0154] In one embodiment, when the UPS is supplying power normally, the voltage value Uh' on the transmission bus 70 is higher than the lowest DC supply voltage value Ub', that is, the condition Uh'≥Ub' is satisfied. When the battery pack voltage U81 of the core capacity protection battery pack 81 is not higher than the lowest normal output voltage value of the rectifier, for example, the normal output voltage range of the rectifier is 240-270V, then the lowest normal output voltage value is 240V, and the battery pack voltage U81 is not higher than 240V, for example, the battery pack voltage U81 of the core capacity protection battery pack 81 when fully charged is 215V, so that when the UPS is supplying power normally, U81<Uh' must be satisfied, so that the diode D1'-D2' cannot be turned on, thereby not satisfying the condition I8>Im, and the converter 82 will not be triggered to start, so that the core capacity protection battery pack 81 is decoupled from the normal power supply process of the UPS power supply, and only participates in the power supply under abnormal conditions, avoiding waste of power energy of the core capacity protection battery pack 81.

[0155] When the UPS power supply is discharged due to the control core capacity or an abnormality occurs, the voltage value Uh' on the transmission bus 70 may drop gradually or rapidly. Then, when the voltage value Uh' drops to less than the battery pack voltage U81, the diode D1'-D2' will be turned on under the pressure difference, so that: on the one hand, the condition I8>Im is satisfied, and on the other hand, due to the conduction of the diode D1'-D2', the voltage value Uh' of the transmission bus 70 will not continue to drop, but will be set to Uh'=U81 (actually slightly smaller than U81, there is a voltage difference caused by the diode, such as 0.7V) ≥Ub', so that the converter 82 can be triggered to start. Here and Figure 8 Similar to the illustrated embodiment, the converter 82 can implement the judgment of the above conditions through a built-in analog circuit, or through a controller, which will not be described in detail here.

[0156] Although the above text uses the case of "the battery pack voltage U81 is not higher than the lowest normal output voltage value of the rectifier" as an example, in fact: even if the battery pack voltage U81 is higher than the lowest normal output voltage value of the rectifier, it can still ensure that the diodes D1'-D2' are turned on when the UPS power supply is abnormal, thereby triggering the converter 82 to start, so that the core capacity protection battery pack 81 provides backup power.

[0157] In addition, when it is detected in step 1104 that Uh'<Ub', it indicates that the transmission bus 70 can no longer supply power normally. At this time, there is no need to determine the value of the current I8, and the converter 82 can be directly triggered to start and supply power.

[0158] Step 1110 , the converter 82 sets the output voltage U82 =Ub′ of the protection device 2 for core capacity discharge.

[0159] In one embodiment, by setting the output voltage U82 to Ub', the voltage value Uh' on the transmission bus 70 changes to be equal to the value of the output voltage U82, that is, Uh'=U82=Ub'.

[0160] In one embodiment, the diodes D1'-D2' are used to trigger the state switching of the converter 82, and the converter 82 subsequently outputs electric energy to the transmission bus 70, rather than directly outputting electric energy through the diodes D1'-D2'. The reason is that the core capacity protection battery pack 81 often quickly experiences a large voltage drop during the discharge process. If the diodes D1'-D2' are directly used to output electric energy, the situation of Uh'>U81 may occur periodically, resulting in the diodes D1'-D2' being cut off and unable to normally transmit power to the transmission bus 70. The converter 82 can stably convert the electric energy of the core capacity protection battery pack 81 into U82=Ub', and will not be affected by the battery voltage drop, thereby ensuring the stable output of DC power to the transmission bus 70, and further ensuring that the server can operate uninterruptedly.

[0161] Step 1112 , when the voltage value Uh′ on the transmission bus 70 recovers to be higher than the preset voltage upper limit Uc, proceed to step 1114 .

[0162] Step 1114, trigger the converter 82 to close.

[0163] In one embodiment, the preset voltage value upper limit Uc is not lower than the maximum battery pack voltage of the core capacity protection battery pack 81, that is, the value of the battery pack voltage U81 when the core capacity protection battery pack 81 is in a fully charged state, which can ensure that the recovery of the voltage value Uh' on the transmission bus 70 is caused by the UPS power supply restoring normal power supply, thereby avoiding misjudgment and causing the transmission bus 70 to be unable to supply power to the server normally. For example, when the maximum value of the battery pack voltage U81 is 215V, the preset voltage value upper limit Uc can be assigned to 235V=U81+20V.

[0164] Fig.12 is a schematic structural diagram of a device provided by an exemplary embodiment. Fig.12 At the hardware level, the device includes a processor 1202, an internal bus 1204, a network interface 1206, a memory 1208, and a non-volatile memory 1210, and may also include hardware required for other services. The processor 1202 reads the corresponding computer program from the non-volatile memory 1210 into the memory 1208 and then runs it, forming a control device for core capacitance discharge at the logical level. Of course, in addition to software implementation, one or more embodiments of this specification do not exclude other implementation methods, such as logic devices or a combination of software and hardware, etc., that is to say, the execution subject of the following processing flow is not limited to each logic unit, but can also be hardware or logic devices.

[0165] Please refer to Fig.13 In a software implementation, the control device for the core capacity discharge may include:

[0166] A determination unit 1301 determines a working state of an initial energy storage element contained in the high voltage DC power supply;

[0167] A sending unit 1302, when in a core capacity discharging state, sends a switching instruction to a converter according to any one of the embodiments corresponding to the above-mentioned high-voltage direct current power supply, wherein the switching instruction is used to instruct the converter to switch between an on state and an off state;

[0168] Among them, the converter in the turned-on state is used to convert the energy storage voltage of the nuclear capacity protection energy storage element or the nuclear capacity protection lithium battery in any one of the embodiments corresponding to the above-mentioned high-voltage DC power supply to a minimum DC supply voltage value not lower than the electrical equipment.

[0169] Optional,

[0170] When the voltage of the DC bus between the high-voltage DC power supply and the power-consuming device is lower than the minimum DC power supply voltage value, the switching instruction is used to instruct the converter to switch from the off state to the on state;

[0171] When the voltage of the DC bus is not lower than the minimum DC supply voltage value, the switching instruction is used to instruct the converter to switch from the on state to the off state.

[0172] Optionally, a unidirectional conduction circuit is provided between the DC bus and the core capacity protection energy storage element or the core capacity protection lithium battery to achieve unidirectional conduction when the power supply of the electrical equipment is abnormal; the sending unit 1302 is specifically used for:

[0173] When the voltage of the DC bus is not lower than the minimum DC supply voltage value and the unidirectional conduction circuit realizes unidirectional conduction, the switching instruction is sent to the converter to instruct the converter to switch from the off state to the on state.

[0174] Optionally, the sending unit 1302 is specifically configured to:

[0175] When the voltage of the DC bus recovers to be higher than the preset voltage upper limit, sending the switching instruction to the converter to instruct the converter to switch from the on state to the off state;

[0176] Among them, the upper limit of the preset voltage value is not lower than the maximum energy storage voltage of the core capacity protection energy storage element or the core capacity protection lithium battery.

[0177] Please refer to Fig.14In a software implementation, the control device for the core capacity discharge may include:

[0178] A determination unit 1401 determines a working state of an initial energy storage element contained in an uninterruptible power supply;

[0179] A sending unit 1402, when in a core capacity discharging state, sends a switching instruction to a converter according to any one of the embodiments corresponding to the above uninterruptible power supply, wherein the switching instruction is used to instruct the converter to switch between an on state and an off state;

[0180] Among them, the converter in the turned-on state is used to transform the energy storage voltage of the nuclear capacity protection energy storage element or the nuclear capacity protection lithium battery in any one of the embodiments corresponding to the above-mentioned uninterruptible power supply, so that after the electric energy output by the nuclear capacity protection energy storage element or the nuclear capacity protection lithium battery to the inverter is converted into alternating current, the alternating current voltage output to the electrical equipment is not lower than the minimum alternating current supply voltage value of the electrical equipment.

[0181] The systems, devices, modules or units described in the above embodiments may be implemented by computer chips or entities, or by products with certain functions. A typical implementation device is a computer, which may be in the form of a personal computer, a laptop computer, a cellular phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email transceiver, a game console, a tablet computer, a wearable device or a combination of any of these devices.

[0182] In a typical configuration, a computer includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0183] The memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0184] Computer-readable media include permanent and non-permanent, removable and non-removable media that can be used to store information by any method or technology. Information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, disk storage, quantum memory, graphene-based storage media or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include temporary computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0185] In this specification, the term "comprises", "includes" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity or device including the element.

[0186] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0187] The terms used in one or more embodiments of this specification are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of this specification. The singular forms of "a", "said" and "the" used in one or more embodiments of this specification and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0188] It should be understood that although the terms first, second, third, etc. may be used to describe various information in one or more embodiments of this specification, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of this specification, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0189] The above description is merely a preferred embodiment of one or more embodiments of the present specification and is not intended to limit one or more embodiments of the present specification. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present specification shall be included in the scope of protection of one or more embodiments of the present specification.

Claims

1. A protection device for nuclear capacity discharge, characterized in that: include: A core capacity protection energy storage element, wherein the positive and negative electrodes of the core capacity protection energy storage element are respectively connected in parallel to a DC bus between a high-voltage DC power supply and an electrical device through a first circuit and a second circuit; A converter, arranged on the first circuit and the second circuit, for converting the energy storage voltage of the core capacity protection energy storage element to a value not lower than the minimum DC power supply voltage of the electrical equipment, so as to provide backup power during the process of core capacity discharge of the initial energy storage element contained in the high-voltage DC power supply; A unidirectional conduction circuit is connected between the DC bus and the core capacity protection energy storage element, and can realize unidirectional conduction when the power supply of the electrical equipment is abnormal, so as to trigger the converter to switch from the closed state to the open state; The unidirectional conduction circuit includes: a first unidirectional conduction device and a second unidirectional conduction device, wherein the first unidirectional conduction device is connected in parallel to the first circuit, and the two ends of the first unidirectional conduction device are respectively connected to the two sides of the converter, and is used to realize unidirectional conduction from the positive electrode of the core capacitor protection energy storage element to the DC bus when the power supply of the electrical equipment is abnormal; the second unidirectional conduction device is connected in parallel to the second circuit, and the two ends of the second unidirectional conduction device are respectively connected to the two sides of the converter, and is used to realize unidirectional conduction from the DC bus to the negative electrode of the core capacitor protection energy storage element when the power supply of the electrical equipment is abnormal.

2. The device according to claim 1, characterized in that The converter is used to: When the voltage of the DC bus is lower than the minimum DC supply voltage value, switching from the closed state to the open state; When the voltage of the DC bus is restored to a value not lower than the minimum DC supply voltage value, the on state is switched to the off state.

3. The device according to claim 1, characterized in that The converter switches from a closed state to an open state when the voltage of the DC bus is not lower than the minimum DC supply voltage value and the unidirectional conduction circuit realizes unidirectional conduction.

4. The device according to claim 1, characterized in that The energy storage voltage of the core capacity protection energy storage element is not higher than the lowest normal output voltage value of the high-voltage DC power supply.

5. The device according to claim 4, characterized in that The converter is also used to switch from an on state to a off state when the voltage of the DC bus recovers to a value higher than a preset voltage upper limit; wherein the preset voltage upper limit is not lower than the maximum energy storage voltage of the core capacity protection energy storage element.

6. The device according to claim 1, characterized in that Also includes: The controller is used to send a switching instruction to the converter to instruct the converter to switch between an on state and an off state.

7. The device according to claim 1, characterized in that The constituent units of the nuclear capacity protection energy storage element include lithium battery units.

8. The device according to claim 1, characterized in that The converter is also used to convert the AC power output by the external AC power supply into DC power to charge the nuclear capacity protection energy storage element.

9. A protection device for nuclear capacity discharge, characterized in that: include: A core-capacity protection lithium battery, wherein the positive and negative electrodes of the core-capacity protection lithium battery are detachably connected in parallel to a DC bus between a high-voltage DC power supply and an electrical device through a first circuit and a second circuit respectively; A converter, arranged on the first circuit and the second circuit, for converting the energy storage voltage of the core capacity protection lithium battery to a value not lower than the minimum DC power supply voltage of the electrical equipment, so as to provide backup power during the process of core capacity discharge of the initial energy storage element contained in the high-voltage DC power supply; A unidirectional conduction circuit is connected between the DC bus and the core-capacitor protection lithium battery, and can realize unidirectional conduction when the power supply of the power-consuming device is abnormal, so as to trigger the converter to switch from the off state to the on state; The unidirectional conduction circuit includes: a first unidirectional conduction device and a second unidirectional conduction device, wherein the first unidirectional conduction device is connected in parallel to the first circuit, and the two ends of the first unidirectional conduction device are respectively connected to the two sides of the converter, and is used to realize unidirectional conduction from the positive electrode of the core capacitor protection lithium battery to the DC bus when the power supply of the electrical equipment is abnormal; the second unidirectional conduction device is connected in parallel to the second circuit, and the two ends of the second unidirectional conduction device are respectively connected to the two sides of the converter, and is used to realize unidirectional conduction from the DC bus to the negative electrode of the core capacitor protection lithium battery when the power supply of the electrical equipment is abnormal.

10. A power supply system, characterized in that: include: A high-voltage direct current power supply, used to convert high-voltage alternating current into high-voltage direct current, and output it to electrical equipment through a direct current bus, wherein the high-voltage direct current power supply comprises an initial energy storage element; A protection device for nuclear capacity discharge according to any one of claims 1 to 9, for providing backup power during the nuclear capacity discharge of the initial energy storage element.

11. The system according to claim 10, characterized in that The electric energy generated by the core capacity discharge of the initial energy storage element is output to the electric device.

12. A protection device for nuclear capacitor discharge, characterized in that: include: A nuclear capacity protection energy storage element, wherein the positive and negative electrodes of the nuclear capacity protection energy storage element are respectively connected in parallel to a transmission bus between an uninterruptible power supply and an inverter through a first circuit and a second circuit, and an output end of the inverter is connected to an electrical device; A converter, arranged on the first circuit and the second circuit, for converting the energy storage voltage of the core capacity protection energy storage element, so that after the electric energy output by the core capacity protection energy storage element to the transmission bus is converted into alternating current by the inverter, the alternating current voltage output to the electric equipment is not lower than the minimum alternating current supply voltage value of the electric equipment, so that the core capacity protection energy storage element can provide backup electric energy during the process of core capacity discharge of the initial energy storage element contained in the uninterruptible power supply; A unidirectional conduction circuit is connected between the transmission bus and the core capacity protection energy storage element, and can realize unidirectional conduction when the power supply of the electrical equipment is abnormal, so as to trigger the converter to switch from the closed state to the open state; The unidirectional conduction circuit includes: a first unidirectional conduction device and a second unidirectional conduction device, wherein the first unidirectional conduction device is connected in parallel to the first line, and the two ends of the first unidirectional conduction device are respectively connected to the two sides of the converter, and is used to realize unidirectional conduction from the positive electrode of the core capacitor protection energy storage element to the transmission bus when the power supply of the electrical equipment is abnormal; the second unidirectional conduction device is connected in parallel to the second line, and the two ends of the second unidirectional conduction device are respectively connected to the two sides of the converter, and is used to realize unidirectional conduction from the transmission bus to the negative electrode of the core capacitor protection energy storage element when the power supply of the electrical equipment is abnormal.

13. A protection device for nuclear capacity discharge, characterized in that: include: A core-capacity protection lithium battery, wherein the positive and negative electrodes of the core-capacity protection lithium battery are detachably connected in parallel to a transmission bus between an uninterruptible power supply and an inverter through a first circuit and a second circuit, respectively, and an output end of the inverter is connected to an electrical device; A converter, arranged on the first circuit and the second circuit, for converting the energy storage voltage of the core-capacity protection lithium battery, so that after the electric energy output by the core-capacity protection lithium battery to the transmission bus is converted into alternating current by the inverter, the alternating current voltage output to the electric equipment is not lower than the minimum alternating current supply voltage value of the electric equipment, so that the core-capacity protection lithium battery can provide backup electric energy during the process of core-capacity discharge of the initial energy storage element contained in the uninterruptible power supply; A unidirectional conduction circuit is connected between the transmission bus and the core capacity protection lithium battery, and can realize unidirectional conduction when the power supply of the power-consuming equipment is abnormal, so as to trigger the converter to switch from the closed state to the open state; The unidirectional conduction circuit includes: a first unidirectional conduction device and a second unidirectional conduction device, wherein the first unidirectional conduction device is connected in parallel to the first line, and the two ends of the first unidirectional conduction device are respectively connected to the two sides of the converter, and is used to realize unidirectional conduction from the positive electrode of the core capacity protection lithium battery to the transmission bus when the power supply of the electrical equipment is abnormal; the second unidirectional conduction device is connected in parallel to the second line, and the two ends of the second unidirectional conduction device are respectively connected to the two sides of the converter, and is used to realize unidirectional conduction from the transmission bus to the negative electrode of the core capacity protection lithium battery when the power supply of the electrical equipment is abnormal.

14. A power supply system, characterized in that: include: An uninterruptible power supply, used to rectify high-voltage alternating current into high-voltage direct current, store the high-voltage direct current into an initial energy storage element, and invert the high-voltage direct current into high-voltage alternating current and output it to an electrical device; The protection device for nuclear capacity discharge as claimed in claim 12 or 13 is used to provide backup power during the process of nuclear capacity discharge of the initial energy storage element.

15. A method for controlling nuclear capacitor discharge, characterized in that: include: Determine the working state of the initial energy storage element contained in the high voltage DC power supply; When in a nuclear capacity discharge state, sending a switching instruction to the converter according to any one of claims 1 to 11, wherein the switching instruction is used to instruct the converter to switch between an on state and an off state; Among them, the converter in the turned-on state is used to convert the energy storage voltage of the nuclear capacity protection energy storage element or the nuclear capacity protection lithium battery as described in any one of claims 1 to 11 to a minimum DC supply voltage value not lower than the electrical equipment.

16. The method according to claim 15, characterized in that When the voltage of the DC bus between the high-voltage DC power supply and the power-consuming device is lower than the minimum DC power supply voltage value, the switching instruction is used to instruct the converter to switch from the off state to the on state; When the voltage of the DC bus is not lower than the minimum DC supply voltage value, the switching instruction is used to instruct the converter to switch from an on state to an off state.

17. The method according to claim 15, characterized in that When the core capacity is in a discharging state, sending a switching instruction to the converter comprises: When the voltage of the DC bus is not lower than the minimum DC supply voltage value and the unidirectional conduction circuit according to any one of claims 1 to 11 realizes unidirectional conduction, the switching instruction is sent to the converter to instruct the converter to switch from the off state to the on state.

18. The method according to claim 17, characterized in that When the core capacity is in a discharging state, sending a switching instruction to the converter also includes: When the voltage of the DC bus recovers to be higher than the preset voltage upper limit, sending the switching instruction to the converter to instruct the converter to switch from the on state to the off state; Among them, the upper limit of the preset voltage value is not lower than the maximum energy storage voltage of the core capacity protection energy storage element or the core capacity protection lithium battery.

19. A method for controlling nuclear capacitor discharge, characterized in that: include: Determine the working state of the initial energy storage element contained in the uninterruptible power supply; When in a nuclear capacity discharge state, sending a switching instruction to the converter according to any one of claims 12 to 14, wherein the switching instruction is used to instruct the converter to switch between an on state and an off state; Among them, the converter in the turned-on state is used to transform the energy storage voltage of the nuclear capacity protection energy storage element or the nuclear capacity protection lithium battery as described in any one of claims 12-14, so that after the electric energy output by the nuclear capacity protection energy storage element or the nuclear capacity protection lithium battery to the inverter is converted into alternating current, the alternating current voltage output to the electrical equipment is not lower than the minimum alternating current supply voltage value of the electrical equipment.

20. A control device for nuclear capacitor discharge, characterized in that: include: A determination unit, which determines the working state of the initial energy storage element contained in the high-voltage direct current power supply; A sending unit, when in a core capacity discharging state, sending a switching instruction to the converter according to any one of claims 1 to 11, wherein the switching instruction is used to instruct the converter to switch between an on state and an off state; Among them, the converter in the turned-on state is used to convert the energy storage voltage of the nuclear capacity protection energy storage element or the nuclear capacity protection lithium battery as described in any one of claims 1 to 11 to a minimum DC supply voltage value not lower than the electrical equipment.

21. A control device for nuclear capacitor discharge, characterized in that: include: A determination unit, which determines the working state of an initial energy storage element contained in the uninterruptible power supply; A sending unit, when in a core capacity discharging state, sending a switching instruction to the converter according to any one of claims 12 to 14, wherein the switching instruction is used to instruct the converter to switch between an on state and an off state; Among them, the converter in the turned-on state is used to transform the energy storage voltage of the nuclear capacity protection energy storage element or the nuclear capacity protection lithium battery as described in any one of claims 12-14, so that after the electric energy output by the nuclear capacity protection energy storage element or the nuclear capacity protection lithium battery to the inverter is converted into alternating current, the alternating current voltage output to the electrical equipment is not lower than the minimum alternating current supply voltage value of the electrical equipment.

22. A control device for nuclear capacitor discharge, characterized in that: include: processor; a memory for storing processor-executable instructions; The processor implements the method according to any one of claims 15 to 19 by running the executable instructions.

23. A computer-readable storage medium having computer instructions stored thereon, characterized in that: When the instruction is executed by a processor, the steps of the method according to any one of claims 15 to 19 are implemented.

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