Switch machine power supply circuit and power supply system

Abstract

The utility model discloses a switch machine power supply circuit and a power supply system. The switch machine power supply circuit comprises a mains supply control module, a voltage stabilizing module, a first bus, a second bus, a first power supply module and a second power supply module. The commercial power control module is connected with commercial power and is conducted according to the connected control signal; the voltage stabilization module is connected with the commercial power control module, the first bus and the second bus, and is used for performing voltage stabilization processing on a signal output by the commercial power control module and then supplying power to the first bus and the second bus; the first power supply module is connected with the first bus and the switch machine, the second power supply module is connected with the second bus and the switch machine, and the first power supply module and the second power supply module are used for supplying power to the switch machine in parallel. According to the switch machine power supply circuit, the first power supply module and the second power supply module are adopted to supply power to the switch machine in parallel, when one bus fails in power supply, the power supply module connected with the other bus continues to supply power to the switch machine, power supply switching is not needed, and the switch machine power supply circuit has high reliability.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of power supply and distribution, especially relates to a switch machine power supply circuit and power supply system. BACKGROUND

[0002] Switch machine is a crucial equipment in railway system, responsible for controlling the switching of track, ensuring that the train can safely and accurately run on different tracks. The reliability of switch machine power supply plays an important role in maintaining the stability of railway power supply system and ensuring the stable operation of train.

[0003] Currently, switch machine power supply is generally through ATS (Automatic Transfer Switch) to directly hang the switch machine to the rear end of two busbars, when one busbar fails, through ATS to jump to the other busbar. However, there is a delay in the switching process of ATS, which may cause the switch machine to fail to switch in time, in addition, when ATS switches from one power supply to another, voltage fluctuation or transient overvoltage may occur, affecting the normal work of other equipment. UTILITY MODEL CONTENTS

[0004] The utility model provides a switch machine power supply circuit and power supply system to solve the problem of power supply switching in prior art.

[0005] According to an aspect of the utility model, a switch machine power supply circuit is provided, comprising a commercial power control module, a voltage stabilizing module, a first busbar, a second busbar, a first power supply module and a second power supply module;

[0006] The commercial power control module is connected to commercial power and turned on according to the control signal connected;

[0007] The voltage stabilizing module is connected to the commercial power control module, the first busbar and the second busbar, and is used for stabilizing the signal output by the commercial power control module and supplying power to the first busbar and the second busbar;

[0008] The first power supply module is connected to the first busbar and the switch machine, and the second power supply module is connected to the second busbar and the switch machine, and the first power supply module and the second power supply module are used for parallel power supply to the switch machine.

[0009] Optionally, the first power supply module comprises a first control unit, which is used for cutting off the power supply line of the first power supply module to the switch machine when the first power supply module fails.

[0010] Optionally, the second power supply module comprises a second control unit, and the second control unit is configured to cut off a power supply line of the second power supply module to the switch machine when the second power supply module fails.

[0011] Optionally, the commercial power control module comprises a first power supply switching unit and a second power supply switching unit, the first power supply switching unit is connected to at least one commercial power supply line, and the first power supply switching unit is configured to be turned on according to the control signal connected thereto; the second power supply switching unit is connected to at least one commercial power supply line, and the second power supply switching unit is configured to be turned on according to the control signal connected thereto.

[0012] Optionally, the first power supply switching unit comprises a first switch, a second switch, a first contactor and a second contactor, a first end of the first switch is connected to an input end of the first power supply switching unit, a second end of the first switch is connected to a first end of the first contactor, a second end of the first contactor is connected to an output end of the first power supply switching unit, a first end of the second switch is connected to the input end of the first power supply switching unit, a second end of the second switch is connected to a first end of the second contactor, and a second end of the second contactor is connected to the output end of the first power supply switching unit.

[0013] Optionally, the second power supply switching unit comprises a third switch, a fourth switch, a third contactor and a fourth contactor, a first end of the third switch is connected to an input end of the second power supply switching unit, a second end of the third switch is connected to a first end of the third contactor, a second end of the third contactor is connected to an output end of the second power supply switching unit, a first end of the fourth switch is connected to the input end of the second power supply switching unit, a second end of the fourth switch is connected to a first end of the fourth contactor, and a second end of the fourth contactor is connected to the output end of the second power supply switching unit.

[0014] Optionally, the voltage stabilizing module comprises a first voltage stabilizing unit and a second voltage stabilizing unit, the first voltage stabilizing unit is connected to the first power supply switching unit and the first bus, the second voltage stabilizing unit is connected to the second power supply switching unit and the second bus, the first voltage stabilizing unit is configured to stabilize the signal output by the first power supply switching unit and supply power to the first bus, and the second voltage stabilizing unit is configured to stabilize the signal output by the second power supply switching unit and supply power to the second bus.

[0015] Optionally, the first voltage stabilizing module comprises a first uninterruptible power supply and a first battery, the first uninterruptible power supply is connected between the input end of the first voltage stabilizing unit and the output end of the first voltage stabilizing unit, the first uninterruptible power supply is further connected with the first battery, and the first uninterruptible power supply is used for supplying power to the first bus according to the signal output by the first power switching unit or supplying power to the first bus according to the signal output by the first battery.

[0016] Optionally, the second voltage stabilizing module comprises a second uninterruptible power supply and a second battery, the second uninterruptible power supply is connected between the input end of the second voltage stabilizing unit and the output end of the second voltage stabilizing unit, the second uninterruptible power supply is further connected with the second battery, and the second uninterruptible power supply is used for supplying power to the first bus according to the signal output by the second power switching unit or supplying power to the first bus according to the signal output by the second battery.

[0017] According to another aspect of the utility model, a power supply system is provided, comprising the switch machine power supply circuit.

[0018] The technical scheme of the utility model embodiment provides a switch machine power supply circuit, a voltage stabilizing module stabilizes the signal output by a commercial power control module, and then supplies power to a first bus and a second bus, a first power supply module and a second power supply module are connected with the first bus and the second bus respectively, the first power supply module and the second power supply module supply power to the switch machine in parallel, when one bus power supply fails, the power supply module connected with the other bus continues to supply power to the switch machine, and power switching is not needed, so that the power supply circuit has high reliability.

[0019] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the utility model, and is not used to limit the scope of the utility model. Other features of the utility model will become easy to understand through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the utility model embodiment, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0021] Figure 1 It is a structure schematic view of a switch machine power supply circuit provided by the utility model embodiment;

[0022] Figure 2The utility model embodiment provides a kind of circuit diagram of switch machine power supply circuit;

[0023] Figure 3 The utility model embodiment provides the installation schematic drawing of power supply module;

[0024] Figure 4 The utility model embodiment provides a kind of structure schematic drawing of power supply system. DETAILED DESCRIPTION

[0025] In order to make the personnel in the technical field better understand the utility model scheme, the technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, apparently, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor should belong to the scope of protection of the utility model.

[0026] It should be noted that the terms "first", "second" and the like in the description and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0027] Railway transportation plays an important role in the national economy and social development, not only in passenger transport to provide convenient and efficient travel, freight development is also indispensable. Switch machine is a crucial device in the railway system, responsible for controlling the switching of the track, to ensure that the train can safely and accurately travel on different tracks. The reliability of switch machine power supply plays an important role in maintaining the stability of the railway power supply system output and ensuring the stable operation of the train. Currently, switch machine power supply is generally through ATS to hang the switch machine directly to the back end of two busbars, when one busbar fails, switch to the other busbar through ATS. Although ATS is involved in quickly switching power supply, there is still a delay in the switching process, which may cause the switch machine to fail to switch in time. In addition, when the ATS switches from one power supply to another, voltage fluctuations or transient overvoltage may occur, and a UPS (Uninterruptible Power Supply) or power grid may be connected at the front end of the busbar, which may affect the stable operation of the front-end circuit and thus affect the normal work of other devices. In addition, using ATS for switching increases the complexity of the system and also introduces an additional failure point. If the ATS itself fails, it will cause the power supply to fail to switch normally, so that the switch machine cannot obtain normal power supply.

[0028] To solve the above problems, the utility model embodiment provides a switch machine power supply circuit, Figure 1 It is a structure schematic diagram of switch machine power supply circuit provided by the utility model embodiment, as Figure 1 Indicated, switch machine power supply circuit 100 includes commercial power control module 110, voltage stabilizing module 120, first busbar L1, second busbar L2, first power supply module 130 and second power supply module 140;Commercial power control module 110 is connected to commercial power, and is turned on according to the control signal connected;Voltage stabilizing module 120 is connected with commercial power control module 110, first busbar L1 and second busbar L2, and voltage stabilizing module 120 is used to stabilize the signal output by commercial power control module 110 and then supply power for first busbar L1 and second busbar L2;First power supply module 130 is connected with first busbar L1 and switch machine, and second power supply module 140 is connected with second busbar L2 and switch machine, and first power supply module 130 and second power supply module 140 are used to parallel power supply for switch machine.

[0029] In the embodiment, the switch machine is widely used in railway transportation and is an important signal basic equipment. The switch machine realizes the conversion and locking of the turnout through a motor or other power sources. The power supply circuit of the switch machine refers to a circuit system for providing power supply for the switch machine. The commercial power control module 110 is a module for controlling commercial power input. For example, the commercial power control module 110 can control the access of one or more commercial powers. The voltage stabilizing module 120 is a module for performing filtering and voltage stabilizing treatment on the electrical signal output by the commercial power control module 110. The first bus L1 and the second bus L2 refer to a common path on which a plurality of devices are connected in a parallel branch form. The common path mainly collects, distributes and transmits electrical energy. The first power supply module 130 and the second power supply module 140 are connected with the first bus L1 and the second bus L2 respectively. The first power supply module 130 and the second power supply module 140 provide stable power supply for the switch machine and simultaneously have the functions of fault detection and alarm.

[0030] In the embodiment, the commercial power control module 110 accesses multiple commercial powers and controls the conduction of at least one of the commercial powers according to the control signal output by an external control module. After the voltage stabilizing module 120 performs filtering and voltage stabilizing treatment on the electrical signal output by the commercial power control module 110, the electrical signal is transmitted to the first bus L1 and the second bus L2. The first power supply module 130 connected with the first bus L1 supplies power for the switch machine. Meanwhile, the second power supply module 140 connected with the second bus L2 supplies power for the switch machine. When one of the first bus L1 or the second bus L2 has a power supply fault, the power supply module connected with the other bus continues to supply power for the switch machine. Alternatively, when one of the first power supply module 130 or the second power supply module 140 has a fault, the other power supply module continues to supply power for the switch machine, so that the power supply circuit switching can be avoided.

[0031] The technical scheme provided in the embodiment provides a power supply circuit of a switch machine. After a voltage stabilizing module performs voltage stabilizing treatment on the signal output by a commercial power control module, the voltage stabilizing module supplies power for a first bus and a second bus. A first power supply module and a second power supply module are connected with the first bus and the second bus respectively. The first power supply module and the second power supply module supply parallel power for the switch machine. When one bus has a power supply fault, the power supply module connected with the other bus continues to supply power for the switch machine, so that power supply switching is not needed, and the power supply circuit has high reliability. The problem in the prior art that when one bus has a fault, the ATS switches to work on the other bus, and the switching process is generated is solved.

[0032] Figure 2 It is a circuit diagram of a power supply circuit of a switch machine provided in the embodiment of the utility model, as shown in Figure 2As shown, the mains control module 110 includes a first power switching unit 111 and a second power switching unit 112. The first power switching unit 111 is connected to at least one mains power supply, and is used to turn on according to the control signal received. The second power switching unit 112 is connected to at least one mains power supply, and is used to turn on according to the control signal received.

[0033] In this embodiment, the first power switching unit 111 is a unit that switches the mains power supply circuit according to the control signal received. For example, the first power switching unit 111 can be connected to multiple mains power supplies, and can turn on one of them according to the control signal received. If the output of the mains power supply turned on fails, the other mains power supply or multiple mains power supplies can be switched on. The second power switching unit 112 has the same structure and working principle as the first power switching unit 111. The first power switching unit 111 is connected to the first bus L1 after being stabilized by the voltage stabilizing module 120, and the second power switching unit 112 is connected to the second bus L2 after being stabilized by the voltage stabilizing module 120.

[0034] For example, the first power switching unit 111 includes a first switch S1, a second switch S2, a first contactor T1, and a second contactor T2. The first end of the first switch S1 is connected to the input end of the first power switching unit 111, the second end of the first switch S1 is connected to the first end of the first contactor T1, the second end of the first contactor T1 is connected to the output end of the first power switching unit 111, the first end of the second switch S2 is connected to the input end of the first power switching unit 111, the second end of the second switch S2 is connected to the first end of the second contactor T2, and the second end of the second contactor T2 is connected to the output end of the first power switching unit 111.

[0035] In this embodiment, the first switch S1 and the second switch S2 are manual switches, and the first contactor T1 and the second contactor T2 are closed or opened according to the control signal. The first switch S1 and the second switch S2 are closed before the switch machine is powered on. For example, the first contactor T1 is turned on according to the control signal, and the mains power supply is input to the voltage stabilizing module 120 at the rear end. When the circuit in which the first contactor T1 is located fails or the first contactor T1 fails, the first power switching unit 111 can switch the second contactor T2 to turn on according to the control signal, so as to ensure that the mains power supply continues to be input to the voltage stabilizing module 120 at the rear end. The circuit in which the first contactor T1 is located and the circuit in which the second contactor T2 is located are redundant circuits, which improves the reliability of the circuit.

[0036] Specifically, the second power switching unit 112 includes a third switch S3, a fourth switch S4, a third contactor T3 and a fourth contactor T4, the first end of the third switch S3 is connected to the input end of the second power switching unit 112, the second end of the third switch S3 is connected to the first end of the third contactor T3, the second end of the third contactor T3 is connected to the output end of the second power switching unit 112, the first end of the fourth switch S4 is connected to the input end of the second power switching unit 112, the second end of the fourth switch S4 is connected to the first end of the fourth contactor T4, and the second end of the fourth contactor T4 is connected to the output end of the second power switching unit 112.

[0037] In this embodiment, the third switch S3 and the fourth switch S4 are manual switches, and the third contactor T3 and the fourth contactor T4 are closed or opened according to the control signal. The third switch S3 and the fourth switch S4 are closed before the switch machine is powered, for example, the third contactor T3 is preferentially turned on according to the control signal, and the commercial power is input to the voltage stabilizing module 120 at the rear end. When the circuit in which the third contactor T3 is located fails or the third contactor T3 fails, the second power switching unit 112 can switch the fourth contactor T4 to be turned on according to the control signal, so as to ensure that the commercial power continues to be input to the voltage stabilizing module 120 at the rear end. The circuit in which the third contactor T3 is located and the circuit in which the fourth contactor T4 is located are redundant circuits, which improves the reliability of the circuit.

[0038] Continuing to refer to Figure 2 The voltage stabilizing module 120 includes a first voltage stabilizing unit 121 and a second voltage stabilizing unit 122, the first voltage stabilizing unit 121 is connected to the first power switching unit 111 and the first bus L1, the second voltage stabilizing unit 122 is connected to the second power switching unit 112 and the second bus L2, the first voltage stabilizing unit 121 is used for performing voltage stabilizing processing on the signal output by the first power switching unit 111 and then supplying power to the first bus L1, and the second voltage stabilizing unit 122 is used for performing voltage stabilizing processing on the signal output by the second power switching unit 112 and then supplying power to the second bus L2.

[0039] In this embodiment, the first voltage stabilizing unit 121 is a unit for performing voltage stabilizing processing on the electrical signal output by the first power switching unit 111, the second voltage stabilizing unit 122 is a unit for performing voltage stabilizing processing on the electrical signal output by the second power switching unit 112, the first voltage stabilizing unit 121 performs voltage stabilizing processing on the electrical signal output by the first power switching unit 111 and then supplies power to the first bus L1, and the second voltage stabilizing unit 122 performs voltage stabilizing processing on the electrical signal output by the second power switching unit 112 and then supplies power to the second bus L2, thereby improving the stability of the electrical signal on the first bus L1 and the second bus L2.

[0040] Specifically, the first voltage stabilizing module 121 includes a first uninterruptible power supply UPS1 and a first battery BAT1. The first uninterruptible power supply UPS1 is connected between the input end of the first voltage stabilizing unit 121 and the output end of the first voltage stabilizing unit 121. The first uninterruptible power supply UPS1 is also connected with the first battery BAT1. The first uninterruptible power supply UPS1 is used to supply power to the first bus L1 according to the signal output by the first power switching unit 111 or supply power to the first bus L1 according to the signal output by the first battery BAT1.

[0041] In the embodiment, the first uninterruptible power supply UPS1 internally includes a rectifier and an inverter, and has a voltage stabilizing function. On the basis of the above embodiment, the first uninterruptible power supply UPS1 provides a stable electrical signal to the first bus L1 after voltage stabilizing processing of the electrical signal output by the first power switching unit 111. When the first power switching unit 111 fails, the first uninterruptible power supply UPS1 is powered by the first battery BAT1, ensuring continuous power supply of the first bus L1, and ensuring continuity of circuit supply.

[0042] Specifically, the second voltage stabilizing module 122 includes a second uninterruptible power supply UPS2 and a second battery BAT2. The second uninterruptible power supply UPS2 is connected between the input end of the second voltage stabilizing unit 122 and the output end of the second voltage stabilizing unit 122. The second uninterruptible power supply UPS2 is also connected with the second battery BAT2. The second uninterruptible power supply UPS2 is used to supply power to the first bus L1 according to the signal output by the second power switching unit 112 or supply power to the first bus L1 according to the signal output by the second battery BAT2.

[0043] In the embodiment, the second uninterruptible power supply UPS2 internally includes a rectifier and an inverter, and has a voltage stabilizing function. On the basis of the above embodiment, the second uninterruptible power supply UPS2 provides a stable electrical signal to the second bus L2 after voltage stabilizing processing of the electrical signal output by the second power switching unit 112. When the second power switching unit 112 fails, the second uninterruptible power supply UPS2 is powered by the second battery BAT2, ensuring continuous power supply of the second bus L2, and ensuring continuity of circuit supply.

[0044] In the embodiment, when both buses are normally running, the first power supply module 130 and the second power supply module 140 jointly supply power to the switch machine. When power supply of one of the buses fails, the power supply module connected with the other bus supplies power to the switch machine, avoiding circuit switching and eliminating switching delay and switching impact problems. In addition, multiple first power supply modules or multiple second power supply modules can be connected in parallel on one bus, improving the reliability of the system. At the same time, when one of the first power supply module 130 and the second power supply module 140 fails, it can automatically exit and be powered by the other power supply module, reducing the single-point failure of the switch machine power supply point and being conducive to stable operation of the switch machine.

[0045] The first power supply module 130 and the second power supply module 140 are 1 / 2 modules, which can be directly installed on a signal power cabinet, that is, the width of the power supply module is 1 / 2 of the width of the signal power cabinet. The input and output ports of the power supply module are pluggable, and the installation schematic diagram is as shown in Figure 3 For example, the capacity of each power supply module is 15Kva, and the number is configured according to the capacity of the switch machine. The switch machine is installed on the output interface of the power supply module to realize power supply of the switch machine, which has the advantages of convenient installation and easy maintenance. In addition, the power supply module independently monitors the operating condition, timely uploads the operating state and alarm record, and automatically protects when the switch machine has an abnormal state such as short circuit, and uploads the monitoring data, which is convenient for the staff to handle.

[0046] When testing the front-end voltage and current of the switch machine, disconnecting one or two power supply circuits in the first power supply switching unit 111 or the second power supply switching unit 112 will not affect the power supply of the switch machine by the first power supply module or the second power supply module. The power supply of the uninterrupted power supply connected to the bus is supplied by the battery, and the output of the two power supply modules is not affected until the battery power supply is completely lost and the uninterrupted power supply of the normal road is stably powered. When all the power supply is completely disconnected, the uninterrupted power supply is supplied by the battery, and the switch machine will lose power until the battery is completely discharged. When the uninterrupted power supply switch is disconnected, the power supply module loses power and is powered by another power supply module. When a short circuit fault occurs at the rear end of the power supply module, an alarm can be given in time and the power supply module can be withdrawn to avoid expansion.

[0047] The utility model embodiment further provides a kind of power supply system, Figure 4 It is the structure schematic diagram of the power supply system provided in the utility model embodiment, as shown in Figure 4 The power supply system 10 provided in the embodiment includes the switch machine power supply circuit 100 provided in any of the above embodiments, and has the beneficial effects of the switch machine power supply circuit 100 provided in any of the above embodiments, which will not be repeated here.

[0048] It should be understood that the steps can be reordered, added or deleted using the various forms of the flow shown above. For example, the steps described in the utility model can be executed in parallel, sequentially or in different order, as long as the desired results of the technical solutions of the utility model can be achieved, which will not be limited herein.

[0049] The specific embodiments described above do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power supply circuit for a switch machine, characterized in that, It includes a mains power control module, a voltage regulator module, a first busbar, a second busbar, a first power supply module, and a second power supply module; The mains power control module is connected to the mains power and is turned on according to the received control signal; The voltage regulator module is connected to the mains control module, the first bus and the second bus. The voltage regulator module is used to regulate the signal output by the mains control module and then supply power to the first bus and the second bus. The first power supply module is connected to the first busbar and the switch machine, and the second power supply module is connected to the second busbar and the switch machine. The first power supply module and the second power supply module are used to supply power to the switch machine in parallel.

2. The switch machine power supply circuit according to claim 1, characterized in that, The first power supply module includes a first control unit, which is used to disconnect the power supply line from the first power supply module to the switch machine when the first power supply module fails.

3. The switch machine power supply circuit according to claim 1, characterized in that, The second power supply module includes a second control unit, which is used to disconnect the power supply line from the second power supply module to the switch machine when the second power supply module fails.

4. The switch machine power supply circuit according to claim 1, characterized in that, The mains power control module includes a first power switching unit and a second power switching unit. The first power switching unit is connected to at least one mains power source and is used to turn on according to the connected control signal. The second power switching unit is connected to at least one mains power source and is used to turn on according to the connected control signal.

5. The switch machine power supply circuit according to claim 4, characterized in that, The first power switching unit includes a first switch, a second switch, a first contactor, and a second contactor. The first end of the first switch is connected to the input end of the first power switching unit, the second end of the first switch is connected to the first end of the first contactor, and the second end of the first contactor is connected to the output end of the first power switching unit. The first end of the second switch is connected to the input end of the first power switching unit, the second end of the second switch is connected to the first end of the second contactor, and the second end of the second contactor is connected to the output end of the first power switching unit.

6. The switch machine power supply circuit according to claim 4, characterized in that, The second power switching unit includes a third switch, a fourth switch, a third contactor, and a fourth contactor. The first end of the third switch is connected to the input end of the second power switching unit, the second end of the third switch is connected to the first end of the third contactor, and the second end of the third contactor is connected to the output end of the second power switching unit. The first end of the fourth switch is connected to the input end of the second power switching unit, the second end of the fourth switch is connected to the first end of the fourth contactor, and the second end of the fourth contactor is connected to the output end of the second power switching unit.

7. The switch machine power supply circuit according to claim 4, characterized in that, The voltage stabilizing module includes a first voltage stabilizing unit and a second voltage stabilizing unit. The first voltage stabilizing unit is connected to the first power switching unit and the first bus, and the second voltage stabilizing unit is connected to the second power switching unit and the second bus. The first voltage stabilizing unit is used to stabilize the signal output by the first power switching unit and then supply power to the first bus. The second voltage stabilizing unit is used to stabilize the signal output by the second power switching unit and then supply power to the second bus.

8. The switch machine power supply circuit according to claim 7, characterized in that, The first voltage regulator unit includes a first uninterruptible power supply (UPS) and a first battery. The first UPS is connected between the input terminal and the output terminal of the first voltage regulator unit. The first UPS is also connected to the first battery. The first UPS is used to supply power to the first bus according to the signal output by the first power switching unit, or to supply power to the first bus according to the signal output by the first battery.

9. The switch machine power supply circuit according to claim 7, characterized in that, The second voltage regulator unit includes a second uninterruptible power supply and a second battery. The second uninterruptible power supply is connected between the input terminal and the output terminal of the second voltage regulator unit. The second uninterruptible power supply is also connected to the second battery. The second uninterruptible power supply is used to supply power to the first bus according to the signal output by the second power switching unit, or to supply power to the first bus according to the signal output by the second battery.

10. A power supply system, characterized in that, Includes the switch machine power supply circuit as described in any one of claims 1-9.

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