CN216794678U - DC power supply system - Google Patents
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- CN216794678U CN216794678U CN202123441178.4U CN202123441178U CN216794678U CN 216794678 U CN216794678 U CN 216794678U CN 202123441178 U CN202123441178 U CN 202123441178U CN 216794678 U CN216794678 U CN 216794678U
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Abstract
The present invention provides a direct current power supply system, including: the voltage transformation unit is electrically connected with the power supply bus; the rectifying unit comprises at least one rectifying module and is electrically coupled between the transformation unit and the load unit, and the rectifying unit is configured to convert the alternating voltage from the transformation unit into direct voltage and output the direct voltage to the load unit when the power supply bus works normally; and the energy storage unit comprises at least one charging module, an energy storage module and at least one discharging module, the charging module is electrically coupled between the voltage transformation unit and the energy storage module, the input end of the discharging module is connected with the connection end of the charging module and the energy storage module, the output end of the discharging module is connected with the connection end of the rectifying unit and the load unit, the energy storage unit is configured to charge the energy storage module through the voltage transformation unit and the charging module when the power supply bus works normally, the energy storage module discharges to the discharging module when the power supply bus works abnormally, and the energy storage module supplies power to the load unit through the discharging module.
Description
Technical Field
The present invention relates to a power supply system, and more particularly, to a dc power supply system.
Background
The safe and reliable and uninterrupted operation of the data center can not leave the power supply system with high reliability. Currently, a common uninterrupted power supply technology of a domestic data center is mainly High Voltage Direct Current (HVDC), and the power supply technology still has many challenges in early design, project construction and later maintenance.
The existing high-voltage direct-current power supply system adopts a plurality of rectifier modules which are connected in parallel to form a set of power supply system. For example, taking 240V/336V HVDC equipment connected with a 10KV power supply bus as an example, when the system works normally, a plurality of rectifier modules of the equipment supply power to a load; when the 10kV power supply bus is powered off, the energy storage battery serving as equipment backup supplies power to the load. Due to the characteristics of the energy storage battery, the battery voltage will continuously decrease in the process of continuously supplying power, for example, 168 batteries, the battery voltage can be provided in a range of 1.75-2.35 × 168 batteries, i.e., 294-394.8V, which is a relatively wide range. However, this relatively wide voltage range may not be sufficient for certain applications. In addition, in order to meet the requirement of the load on narrower variation range of the input voltage, a bidirectional power supply module is arranged on the side of the energy storage battery, so that the production cost is higher, and the reliability is poor.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a dc power supply system that solves one or more of the disadvantages of the prior art.
In order to achieve the above object, according to an embodiment of the present invention, there is provided a dc power supply system including: the voltage transformation unit is electrically connected with the power supply bus; the rectifying unit comprises at least one rectifying module and is electrically coupled between the transformation unit and a load unit, and the rectifying unit is configured to convert the alternating-current voltage from the transformation unit into direct-current voltage and output the direct-current voltage to the load unit when the power supply bus works normally; and the energy storage unit comprises at least one charging module, an energy storage module and at least one discharging module, the at least one charging module is electrically coupled between the voltage transformation unit and the energy storage module, the input end of the at least one discharging module is connected with the connection end of the at least one charging module and the energy storage module, the output end of the at least one discharging module is connected with the connection end of the rectifying unit and the connection end of the load unit, the energy storage unit is configured to charge the energy storage module through the voltage transformation unit and the at least one charging module when the power supply bus works normally, and the energy storage module discharges the at least one discharging module and supplies power to the load unit through the at least one discharging module when the power supply bus works abnormally.
In an embodiment of the utility model, the energy storage unit includes a plurality of the discharge modules and a plurality of first controllable switch modules, wherein the plurality of discharge modules are divided into a plurality of groups of discharge arrays, each group of the discharge arrays is electrically connected to the energy storage module through a corresponding one of the first controllable switch modules, each of the discharge modules includes a discharge switch tube, and the discharge module is configured to adjust an output voltage thereof by adjusting a duty ratio of the discharge switch tube.
In an embodiment of the utility model, each group of the discharge arrays includes a plurality of the discharge modules, and the plurality of the discharge modules are connected in parallel.
In an embodiment of the utility model, when the output voltage of the energy storage module drops to a first threshold, the output voltage of each discharge module is adjusted to be maintained at a first discharge voltage; when the output voltage of the energy storage modules drops to a second threshold value, the output voltage of each discharge module is adjusted to a second discharge voltage and is kept at the second discharge voltage, wherein the second threshold value is smaller than the first threshold value, and the second discharge voltage is smaller than the first discharge voltage; and when the output voltage of the energy storage module is reduced to a third threshold value, the connection between the discharge array and the energy storage module is disconnected by turning off all the first controllable switch modules.
In an embodiment of the utility model, when the output voltage of the energy storage module is greater than or equal to a first set value, the output voltage of each discharge module is adjusted to be maintained at a third discharge voltage; and when the output voltage of the energy storage module is smaller than the first set value, the connection between the discharge array and the energy storage module is disconnected by turning off all the first controllable switch modules.
In an embodiment of the utility model, the energy storage unit includes a plurality of charging modules and a second controllable switch module, and the plurality of charging modules are connected in parallel and electrically connected to an ac output terminal of the transforming unit through the second controllable switch module; and/or the discharging module is a unidirectional DCDC power supply module; and/or the energy storage module comprises at least one energy storage battery.
In an embodiment of the utility model, the rectifying unit includes a plurality of the rectifying modules and a plurality of third controllable switch modules, wherein the rectifying modules are divided into a plurality of groups of rectifying arrays, and each group of the rectifying arrays is electrically connected to a voltage transformation output end of the corresponding voltage transformation unit through a corresponding third controllable switch module.
In an embodiment of the utility model, each group of the rectifying arrays includes a plurality of the rectifying modules, and the plurality of the rectifying modules are connected in parallel.
In an embodiment of the present invention, the load unit includes a plurality of load modules, and the rectifying unit further includes a plurality of fourth controllable switch modules, wherein output ends of the plurality of rectifying modules of the rectifying unit are connected in parallel and are connected to a plurality of load branches in common, and each load branch is electrically connected to the corresponding load module through a corresponding fourth controllable switch module.
In an embodiment of the utility model, the dc power supply system includes a plurality of rectifying units and a plurality of energy storage units, the rectifying units are electrically connected to the transforming unit, and one energy storage unit is electrically connected to one rectifying unit correspondingly.
In an embodiment of the utility model, each of the rectifying units is integrally installed in a rectifying cabinet, each of the energy storage units is integrally installed in an energy storage cabinet, and the transforming unit is integrally installed in a transforming cabinet.
In an embodiment of the utility model, the plurality of rectifying cabinets and the plurality of energy storage cabinets are located on one side of the transformation cabinet and are arranged at intervals.
In an embodiment of the present invention, the power supply bus is integrally installed in an inlet cabinet, and the inlet cabinet is located at the other side of the transformer cabinet.
In an embodiment of the utility model, the transformation cabinet, the plurality of rectification cabinets and the plurality of energy storage cabinets are sequentially arranged.
In an embodiment of the present invention, the number of the rectifying modules in the rectifying unit is equal to the number of the discharging modules in the energy storage unit.
According to the direct-current power supply system, the independent charging module is used for charging the energy storage module (such as an energy storage battery), and the output voltage of the energy storage module is adjusted through the independent discharging module, so that the requirement of a load on a narrow input voltage change range can be met, a bidirectional power supply module does not need to be arranged on the side of the energy storage module of the power supply system, the cost can be saved, and the reliability can be improved. In the utility model, the discharging module is arranged between the load unit and the energy storage module, so that the load bus voltage (the voltage at the connecting end of the rectifying unit and the load unit) and the energy storage bus voltage (the voltage at the connecting end of the charging module and the energy storage module) can be decoupled, and the discharging module is used for performing boost control or buck control on the energy storage bus voltage, namely the discharging module is used for adjusting the load bus voltage to be higher or lower than the energy storage bus voltage. In addition, the energy storage unit is provided with the independent charging module and the independent discharging module, so that the charging and discharging behaviors of the energy storage unit (such as an energy storage battery) can be flexibly controlled, especially the limitation on the discharging energy of the energy storage unit can be realized, and the protection on the load unit is realized. In addition, the direct current power supply system can make the voltage range of the load bus vary narrowly, so that the input voltage range of the voltage conversion module in the load unit is narrower, the design of the load unit is optimized, and the voltage conversion module in the load unit has higher efficiency and lower cost.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.
FIG. 1 is a schematic structural diagram of an embodiment of a DC power supply system according to the present invention;
fig. 2 is an enlarged schematic view of a partial structure of the dc power supply system of fig. 1.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
When introducing elements/components/etc. described and/or illustrated herein, the articles "a," "an," "the," "said," and "at least one" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. Relative terms, such as "upper" or "lower," may be used in embodiments to describe one component of an icon relative to another component. It will be appreciated that if the device of the icon is turned upside down, components described as being on the "upper" side will be components on the "lower" side. Furthermore, the terms "first," "second," and the like in the claims are used merely as labels, and are not numerical limitations of their objects.
As shown in fig. 1-2, a dc power supply system 1000 provided by the present invention mainly includes a transforming unit 100, a rectifying unit 200, and an energy storing unit 300. The transformer unit 100 is electrically connected to the power supply bus 401. The rectifying unit 200 includes at least one rectifying module 201 electrically coupled between the transforming unit 100 and the load unit 202, and the rectifying unit 200 is configured to convert the ac voltage from the transforming unit 100 into the dc voltage and output the dc voltage to the load unit 202 when the power bus 401 is normally operated. The energy storage unit 300 comprises at least one charging module 301, an energy storage module 302 and at least one discharging module 303, wherein the at least one charging module 301 is electrically coupled between the transforming unit 100 and the energy storage module 302, the input end of the at least one discharging module 303 is connected to the connection end of the at least one charging module 301 and the energy storage module 302, the output terminal of the at least one discharging module 303 is connected to the connection terminal of the rectifying unit 200 and the load unit 202, and the energy storage unit 300 is configured to charge the energy storage module 302 via the transforming unit 100 and the at least one charging module 301 when the power supply bus 401 is normally operated, the energy storage module 302 discharges to the at least one discharge module 303 when the power supply bus 401 is not operating normally, and supplies power to the load unit 202 via the at least one discharging module 303.
In some embodiments of the present invention, as shown in fig. 1-2, the transforming unit 100 may include, for example, a transforming component 101, which may include a transforming input 104, a transforming output 102 (e.g., a secondary winding), and an ac output 103 (e.g., an ac winding). The transforming unit 100 transforms the voltage through the transforming component 101, and can convert the high voltage from the power bus 401 into an ac voltage (for example, 240V, but the utility model is not limited thereto), so as to supply power to the rectifying module 201 of the rectifying unit 200 and the charging module 301 of the energy storage unit 300, and further charge the load unit 202 and the energy storage module 302 of the energy storage unit 300, respectively. It is understood that, when the power supply bus 401 works normally, the power supply process may be selectively performed or may not be performed simultaneously, and the present invention is not limited thereto.
In some embodiments of the present invention, as shown in fig. 1 to 2, the rectification unit 200 may include a plurality of rectification modules 201 and a plurality of controllable switch modules S3 (i.e., a third controllable switch module), for example, the rectification modules 201 may be divided into a plurality of groups of rectification arrays (e.g., AR1 to AR6), and each group of rectification arrays may include a plurality of rectification modules 201 connected in parallel, for example. Moreover, each set of the rectifying arrays may be electrically connected to one of the transforming output terminals 102 of the corresponding transforming unit 100 through a corresponding controllable switch module S3, for example. The load unit 202 may include, for example, a plurality of load modules (e.g., L1 to L6), and the rectifying unit 200 may further include, for example, a plurality of controllable switch modules S4 (i.e., a fourth controllable switch module). The output ends of the plurality of rectifying modules 201 of the rectifying unit 200 are, for example, connected in parallel and are connected to a plurality of load branches in common, and each load branch is electrically connected to a corresponding load module through a corresponding controllable switch module S4. In the present invention, the rectifying unit 200 can convert the ac voltage into a stable dc output voltage to supply power to a load unit (for example, a server in a machine room, but the present invention is not limited thereto), and it should be noted that the number of the "plurality" in the present invention is two or more.
In an embodiment of the utility model, as shown in fig. 1-2, the energy storage unit 300 may include a plurality of charging modules 301 and a controllable switch module S2 (i.e., a second controllable switch module) connected in parallel, for example, and the plurality of charging modules 301 may be electrically connected to an ac output terminal 103 (e.g., a secondary winding) of the transformer unit 100 through the controllable switch module S2. The energy storage unit 300 may further include a plurality of discharge modules 303 and a plurality of controllable switch modules S1 (i.e., a first controllable switch module), where the discharge modules 303 may be divided into a plurality of groups of discharge arrays (e.g., AD 1-AD 6), and each group of discharge arrays may include a plurality of discharge modules 303 connected in parallel, for example. Moreover, each set of discharge arrays may be electrically connected to the energy storage module 302 through a corresponding controllable switch module S1. In the present invention, the energy storage module 302 may include at least one energy storage battery (e.g., E1-E4), and the positive output terminal and the secondary output terminal of each energy storage battery may be electrically connected to the output terminal of the discharge module 303 through a corresponding fuse 304, respectively, so that when the current is too high, the fuse 304 is automatically disconnected, and the energy storage battery can be protected. The discharging module 303 may be, for example, a unidirectional DCDC power supply module. In the present invention, the energy storage unit 300 may supply power to the discharging module 303 through the energy storage module 302, and may charge the energy storage module 302 through the charging module 301.
In the present invention, each discharge module 303 may further include a discharge switch (not shown), and the discharge module 303 may be configured to adjust its output voltage by adjusting a duty ratio of the discharge switch. In some embodiments, the output voltage of each discharge module 303 may be adjusted to remain at the first discharge voltage when the output voltage of the energy storage module 302 falls to the first threshold. When the output voltage of the energy storage module 302 falls to a second threshold, the output voltage of each discharge module 303 may be adjusted to a second discharge voltage and maintained at the second discharge voltage, where the second threshold is smaller than the first threshold, and the second discharge voltage is smaller than the first discharge voltage. When the output voltage of the energy storage module 302 falls to a third threshold, the connection between the discharge array (e.g., AD 1-AD 6) and the energy storage module 302 is disconnected by turning off all the controllable switch modules S1.
Alternatively, in some other embodiments, when the output voltage of the energy storage module 302 is greater than or equal to the first set value, the output voltage of each discharge module 303 may be adjusted to be maintained at the third discharge voltage. When the output voltage of the energy storage module 302 is smaller than the first set value, the connection between the discharge array (e.g., AD 1-AD 6) and the energy storage module 302 is disconnected by turning off all the controllable switch modules S1.
In some embodiments of the present invention, the dc power supply system 1000 may include a plurality of rectifying units 200 and a plurality of energy storage units 300, wherein the plurality of rectifying units 200 are electrically connected to the transforming unit 100, and one energy storage unit 300 is correspondingly electrically connected to one rectifying unit 200. In a preferred embodiment, each of the rectifying units 200 may be integrally installed in a rectifying cabinet, each of the energy storage units 300 may be integrally installed in an energy storage cabinet, and the transforming unit 100 may be integrally installed in a transforming cabinet. Wherein, a plurality of rectifier cabinets and a plurality of energy storage cabinet can be located one side of vary voltage cabinet and interval arrangement. In other embodiments, the power bus 401 may be integrated into an inlet cabinet, which may be located on the other side of the transformer cabinet, for example. It is understood that the transformation cabinet, the plurality of rectification cabinets and the plurality of energy storage cabinets can also be arranged in sequence, and the utility model is not limited thereto. In some embodiments, the number of the rectifying modules 201 in the rectifying unit 200 and the number of the discharging modules 303 in the energy storage unit 300 may be equal, so that when the power supply bus 401 is powered down, the discharging modules 303 with the power capacity equal to or approximately equal to that of the rectifying modules 201 may meet the power supply requirement of the load unit. In other embodiments, the number of the rectifying modules 201 in the rectifying unit 200 and the number of the discharging modules 303 in the energy storage unit 300 may not be equal.
In the application embodiment shown in fig. 1-2, the dc power supply system 1000 may include, for example, 1 transforming unit 100, 4 rectifying units 200 and 4 energy storage units 300, and the transforming unit 100 may be, for example, a phase-shifting transformer and integrated in a transformer cabinet, the 4 rectifying units 200 are respectively integrated in the rectifying cabinets 1-4, the 4 energy storage units 300 are respectively integrated in the energy storage cabinets 1-4, and the rectifying cabinets 1-4 and the energy storage cabinets 1-4 are located at one side of the transformer cabinet and are arranged at intervals, for example, located at the right side of the transformer cabinet and arranged at intervals from left to right in fig. 1. On the left side of the transformer cabinet is a service cabinet, in which a supply bus 401 is integrated. Of course, it is understood that in other embodiments, the number of the rectifying units 200 and the energy storage units 300 is not limited thereto, and different numbers of the rectifying units 200 and the energy storage units 300 may be provided according to actual needs, which are not intended to limit the present invention.
In the application embodiment shown in fig. 1-2, taking the rectifying unit 200 integrated in the rectifying cabinet 1 as an example, the rectifying unit 200 in the rectifying cabinet 1 may include 24 rectifying modules 201, which are respectively represented by R1-R24, wherein 4 rectifying modules are taken as a group, the rectifying modules R1-R24 may be divided into 6 groups of rectifying arrays AR-1-AR-6, and the rectifying arrays AR-1-AR-6 are respectively electrically connected to the load unit 202 through a controllable switch module S3. For example, the group 1 rectifying array AR-1 includes 4 rectifying modules R1 to R4 connected in parallel and electrically connected to a transforming output terminal 102 (e.g., the secondary winding 1) of the transforming unit 100, the output terminals of the 4 rectifying modules R1 to R4 are connected in parallel and commonly connected to the load branch 1, and the load branch 1 may be electrically connected to the corresponding load module L1 through a controllable switch module S4. In this way, the 6 th group of rectifier arrays AR-6 includes 4 rectifier modules R21-R24 connected in parallel and electrically connected to one voltage transformation output terminal 102 (e.g., the secondary winding 6) of the voltage transformation unit 100, the output terminals of the 4 rectifier modules R21-R24 are connected in parallel and connected to the load branch 6, and the load branch 6 may be electrically connected to the corresponding load module L6 through another controllable switch module S4.
In the application embodiments shown in fig. 1-2, taking the energy storage unit 300 integrated in the energy storage cabinet 1 as an example, the energy storage unit 300 in the energy storage cabinet 1 may include, for example, 2 charging modules 301 (respectively represented by C1-C2), an energy storage module 302 (for example, may include 4 energy storage batteries and respectively represented by E1-E4), and 24 discharging modules 303 (respectively represented by D1-D24). The 2 charging modules C1-C2 are connected in parallel, and the input terminals thereof are connected in parallel to an ac output terminal 103 (e.g., ac winding) of the transformer unit 100. Each of the 4 energy storage batteries E1-E4 can be electrically connected to the output terminals of the 2 charging modules C1-C2 through two fuses 304 and battery branches 1-4, respectively. The 24 discharging modules D1-D24 are divided into 6 groups of discharging arrays AD-1-AD-6 with 4 as a group, and the input terminals of the discharging arrays AD-1-AD-6 can be respectively connected with the connecting terminals of the 2 charging modules C1-C2 and the energy storage module 302 through a controllable switch module S1. For example, the 1 st group of discharge array AD-1 includes 4 discharge modules D1-D4 connected in parallel, and the input terminals of the discharge array AD-1 are connected to the connection terminals of the energy storage module 302 and the 2 charge modules C1-C2 through a controllable switch module S1. In the same way, the 6 th group of discharge array AD-6 includes 4 discharge modules D21-D24 connected in parallel, and the input terminals of the discharge arrays are connected to the connection terminals of the 2 charge modules C1-C2 and the energy storage module 302 through another controllable switch module S1.
In the embodiment shown in fig. 1-2, the dc power supply system 1000 can be applied to a data room, for example, which is powered by an inlet cabinet of a 10kV power supply bus. The transformation is carried out through a phase-shifting transformer in the transformation cabinet, and the high voltage can be converted into 240V alternating voltage so as to supply power to a rectifying module in a rectifying cabinet. The 240V ac voltage can be converted into a stable dc output voltage by the rectifying module to supply power to the servers (i.e., the load unit 202) of the computer room.
In this application, the energy storage module is not directly connected in parallel to the load end, but an energy storage cabinet is added. In the energy storage cabinet, the energy storage module 302 can supply power to the discharging modules D1 to D24, and the charging modules C1 to C2 are responsible for charging the energy storage module 302.
When the 10kV power supply bus works normally, the output voltage of the rectifier modules R1-R24 in the rectifier cabinet can be 385V for example, and the output voltage of the discharge modules D1-D24 in the energy storage cabinet can be 375V for example, so that the load unit 202 at the load end can be powered by the rectifier modules R1-R24 of the rectifier cabinet when the power supply bus works normally. At the moment, the alternating current winding of the transformer in the transformer cabinet supplies power to the charging modules C1-C2 in the energy storage cabinet, and then the energy storage modules can be charged through the charging modules C1-C2.
When the power of an input 10kV power supply bus is cut off, the rectifier modules R1-R24 in the rectifier cabinet cannot work, the energy storage modules in the energy storage cabinet supply power to the discharge modules D1-D24, and the output voltages of the discharge modules D1-D24 can be 375V, for example. With the discharge of the energy storage module, when the output voltage of the energy storage module drops to the first threshold, the discharge modules D1 to D24 can maintain the output voltages of the discharge modules D1 to D24 to be stabilized at 375V by adjusting the duty ratios of the switching tubes of their own topologies. With the continuous discharge of the energy storage module, when the output voltage of the energy storage module continuously decreases, for example, decreases to the second threshold, the output voltages of the discharge modules D1 to D24 may gradually decrease to 360V and stably operate by adjusting the duty ratios of the switching tubes according to the characteristics of the topology. When the output voltage of the energy storage module continues to decrease to a third threshold value, for example, to the lowest rated voltage 210V of the energy storage module, the energy storage battery can be protected by turning off the discharging modules D1-D24.
Through the process of the direct current power supply system, the requirement of the load on narrower input voltage variation range can be met, and the input voltage of the load can be controlled to be 360-380V, for example.
According to the direct-current power supply system, the energy storage module (such as an energy storage battery) is charged by the independent charging module, and the output voltage of the energy storage unit is adjusted by the independent discharging module, so that the requirement of a load on a narrow input voltage change range can be met, a module for bidirectional power supply does not need to be arranged on the energy storage module side of the power supply system, the cost can be saved, and the reliability can be improved. In the utility model, the discharging module is arranged between the load unit and the energy storage module, so that the load bus voltage (the voltage at the connecting end of the rectifying unit and the load unit) and the energy storage bus voltage (the voltage at the connecting end of the charging module and the energy storage module) can be decoupled, and the discharging module is used for performing boost control or buck control on the energy storage bus voltage, namely the discharging module is used for adjusting the load bus voltage to be higher or lower than the energy storage bus voltage. In addition, the energy storage unit is provided with the independent charging module and the independent discharging module, so that the charging and discharging behaviors of the energy storage unit (such as an energy storage battery) can be flexibly controlled, especially the limitation on the discharging energy of the energy storage unit can be realized, and the protection on the load unit is realized. In addition, the direct current power supply system can make the voltage range of the load bus vary narrowly, so that the input voltage range of the voltage conversion module in the load unit is narrower, the design of the load unit is optimized, and the voltage conversion module in the load unit has higher efficiency and lower cost.
Exemplary embodiments of the present invention are specifically illustrated and described above. It is to be understood that the utility model is not to be limited to the disclosed embodiments, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (15)
1. A dc power supply system, comprising:
the voltage transformation unit is electrically connected with the power supply bus;
the rectifying unit comprises at least one rectifying module and is electrically coupled between the transformation unit and a load unit, and the rectifying unit is configured to convert the alternating-current voltage from the transformation unit into direct-current voltage and output the direct-current voltage to the load unit when the power supply bus works normally; and
the energy storage unit comprises at least one charging module, an energy storage module and at least one discharging module, wherein the at least one charging module is electrically coupled between the voltage transformation unit and the energy storage module, the input end of the at least one discharging module is connected with the connection end of the at least one charging module and the energy storage module, the output end of the at least one discharging module is connected with the connection end of the rectification unit and the load unit, the energy storage unit is configured to charge the energy storage module through the voltage transformation unit and the at least one charging module when the power supply bus works normally, and the energy storage module discharges the at least one discharging module and supplies power to the load unit through the at least one discharging module when the power supply bus works abnormally.
2. The dc power supply system of claim 1, wherein the energy storage unit comprises a plurality of discharge modules and a plurality of first controllable switch modules, wherein the plurality of discharge modules are divided into a plurality of groups of discharge arrays, each group of discharge arrays is electrically connected to the energy storage module through a corresponding first controllable switch module, each discharge module comprises a discharge switch, and the discharge modules are configured to adjust output voltages thereof by adjusting duty ratios of the discharge switches.
3. The dc power supply system of claim 2, wherein each set of the discharge arrays includes a plurality of the discharge modules, the plurality of discharge modules being connected in parallel.
4. The DC power supply system according to claim 2,
when the output voltage of the energy storage module is reduced to a first threshold value, the output voltage of each discharge module is regulated to be kept at a first discharge voltage;
when the output voltage of the energy storage modules drops to a second threshold value, the output voltage of each discharge module is adjusted to a second discharge voltage and is kept at the second discharge voltage, wherein the second threshold value is smaller than the first threshold value, and the second discharge voltage is smaller than the first discharge voltage;
and when the output voltage of the energy storage module is reduced to a third threshold value, the connection between the discharge array and the energy storage module is disconnected by turning off all the first controllable switch modules.
5. The DC power supply system according to claim 2,
when the output voltage of the energy storage module is greater than or equal to a first set value, the output voltage of each discharging module is regulated to be kept at a third discharging voltage;
and when the output voltage of the energy storage module is smaller than the first set value, the connection between the discharge array and the energy storage module is disconnected by turning off all the first controllable switch modules.
6. The dc power supply system of claim 1, wherein the energy storage unit comprises a plurality of charging modules and a second controllable switch module, and the plurality of charging modules are connected in parallel and electrically connected to an ac output terminal of the transforming unit through the second controllable switch module; and/or the discharging module is a unidirectional DCDC power supply module; and/or the energy storage module comprises at least one energy storage battery.
7. The dc power supply system of claim 1, wherein the rectifying unit comprises a plurality of rectifying modules and a plurality of third controllable switch modules, wherein the rectifying modules are divided into a plurality of groups of rectifying arrays, and each group of rectifying arrays is electrically connected to a voltage transformation output terminal of the corresponding voltage transformation unit through a corresponding third controllable switch module.
8. The dc power supply system of claim 7, wherein each set of said rectifying arrays comprises a plurality of said rectifying modules, said plurality of said rectifying modules being connected in parallel.
9. The dc power supply system of claim 7, wherein the load unit comprises a plurality of load modules, the rectifying unit further comprises a plurality of fourth controllable switch modules, wherein output terminals of the plurality of rectifying modules of the rectifying unit are connected in parallel and are connected to a plurality of load branches in common, and each load branch is electrically connected to a corresponding load module through a corresponding fourth controllable switch module.
10. The dc power supply system of claim 1, wherein the dc power supply system comprises a plurality of rectifying units and a plurality of energy storage units, the rectifying units are electrically connected to the transforming unit, and one energy storage unit is electrically connected to one rectifying unit.
11. The dc power supply system of claim 10, wherein each of the rectifying units is integrally installed in a rectifying cabinet, each of the energy storage units is integrally installed in an energy storage cabinet, and the transforming unit is integrally installed in a transforming cabinet.
12. The dc power supply system of claim 11, wherein a plurality of the rectifier cabinets and a plurality of the energy storage cabinets are located on one side of the transformer cabinet and are spaced apart.
13. The dc power supply system of claim 12, wherein the power bus is integrally installed in a cabinet, the cabinet being located on the other side of the transformer cabinet.
14. The dc power supply system according to claim 11, wherein the transformer cabinet, the plurality of rectifier cabinets, and the plurality of energy storage cabinets are arranged in sequence.
15. The dc power supply system of claim 1, wherein the number of the rectifying modules in the rectifying unit and the number of the discharging modules in the energy storage unit are equal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123441178.4U CN216794678U (en) | 2021-12-31 | 2021-12-31 | DC power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123441178.4U CN216794678U (en) | 2021-12-31 | 2021-12-31 | DC power supply system |
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