Alternating current power supply control method, power supply system, rolling stock and medium

Abstract

The invention discloses an alternating current power supply control method, a power supply system, a rolling stock and a medium, and relates to the technical field of rail transit. According to the method, a plurality of power supplies are used for synchronously supplying power to a load, namely, high-power stable power output can be realized by using a relatively low power supply, so that the power supply capacity of the power supplies is improved; the power supply does not need to be redesigned, the fault rate of the power supply is reduced, the power supply is controlled to be connected into the load bus through the switching element, namely, the output power of the power supply is controllable, and resource waste caused by redesigning and manufacturing high-power output is avoided; secondly, a plurality of power supplies are connected to the load bus one by one, and after a new power supply is started, the phase matching parameter of the newly started power supply is controlled to be consistent with the reference phase matching parameter of the power supply connected to the load bus, and then the switch element is closed, so that interference between output voltages of the power supplies is avoided; and the output of the plurality of power supplies can meet the load requirement.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail transit, in particular to an alternating current power supply control method, a power supply system, a locomotive vehicle and a medium. BACKGROUND

[0002] Generally, a locomotive vehicle is powered by a locomotive for a load (such as a plurality of carriages). With the increase in the number of electrical equipment in the carriage and the increase in power, the power supply demand of the load is gradually increasing.

[0003] In order to meet the power supply demand of the load, the power of the input power supply of the load is correspondingly increased in the related art. This process requires the redesign of the power supply module, and is prone to cause the failure of the power supply. In addition, if the power of the power supply is greater than the actual load demand after the power supply is redesigned, it will cause waste of resources.

[0004] Therefore, it is urgent for those skilled in the art to provide a new power supply control scheme. SUMMARY

[0005] The present application aims to provide an alternating current power supply control method, a power supply system, a locomotive vehicle and a medium, so as to solve the technical problems in the related power supply control, that is, in order to meet the power supply demand of the load, the power of the input power supply of the load is correspondingly increased, the power supply module needs to be redesigned, and the power supply is prone to failure and causes waste of resources.

[0006] To solve the above technical problems, the present application provides an alternating current power supply control method applied to a controller in a power supply system, the power supply system further comprising a plurality of power supplies and switching elements, the power supplies and the switching elements corresponding one by one; the controller is connected with the input end of the power supply, the output end of the power supply is connected with the fixed end of the switching element, and the movable end of the switching element is connected with the load to be powered through a load bus; the method comprises:

[0007] obtaining the voltage condition on the load bus;

[0008] if it is detected that the voltage condition is that there is no voltage on the load bus, starting a first target power supply; controlling the switching element corresponding to the first target power supply to be closed, so as to connect the first target power supply to the load bus; wherein the first target power supply is any one of the plurality of power supplies;

[0009] If it is detected that the voltage condition is that there is voltage on the load bus, a reference phase matching parameter of a power supply connected to the load bus is obtained; a second target power supply is started, and the phase matching parameter of the second target power supply is controlled to be consistent with the reference phase matching parameter; a switching element corresponding to the second target power supply is controlled to be closed, so as to connect the second target power supply to the load bus; wherein the second target power supply is any one of the remaining power supplies in the plurality of power supplies except the power supply connected to the load bus.

[0010] Exemplarily, the power supply system further comprises a load bus voltage sensor;

[0011] The load bus voltage sensor corresponds to the power supply one by one; or, a plurality of power supplies on the same locomotive correspond to one load bus voltage sensor;

[0012] The obtaining of the voltage condition on the load bus comprises:

[0013] A voltage signal collected by the load bus voltage sensor is obtained, and a voltage value is determined according to the voltage signal;

[0014] In a case where it is detected that the voltage value is less than a preset voltage value, it is determined that the voltage condition on the load bus is no voltage;

[0015] In a case where it is detected that the voltage value is greater than or equal to the preset voltage value, it is determined that the voltage condition on the load bus is voltage.

[0016] Exemplarily, the power supply system further comprises a power supply detector; the power supply detector corresponds to the power supply one by one, and the output end of the power supply and the fixed end of the switching element are connected through the power supply detector;

[0017] Before the switching element corresponding to the target power supply is controlled to be closed, further comprising:

[0018] The output condition of the target power supply is detected through the power supply detector corresponding to the target power supply; wherein the target power supply is the first target power supply or the second target power supply;

[0019] The control of the switching element corresponding to the target power supply to be closed comprises:

[0020] In a case where it is detected that the output condition of the target power supply is that the output voltage value reaches a target voltage value, the switching element corresponding to the target power supply is controlled to be closed.

[0021] Exemplarily, before the step of controlling the switch element corresponding to the target power supply to be closed, the method further comprises:

[0022] determining whether an output fault exists according to the output condition, wherein the output fault at least comprises an overcurrent fault and a voltage fluctuation fault;

[0023] if not, entering the step of controlling the switch element corresponding to the target power supply to be closed;

[0024] if yes, controlling the target power supply to be closed.

[0025] Exemplarily, before the step of obtaining the voltage condition on the load bus, the method further comprises:

[0026] obtaining a power supply sequence of a plurality of power supplies which are preset;

[0027] starting the target power supply comprises:

[0028] starting the target power supply according to the power supply sequence.

[0029] Exemplarily, after the step of controlling the switch element corresponding to the target power supply to be closed, the method further comprises:

[0030] obtaining a current state of the switch element corresponding to the target power supply;

[0031] in a case where it is detected that the current state is a closed state, determining that the target power supply supplies power to the load;

[0032] in a case where it is detected that the current state is an open state, controlling the switch element corresponding to the target power supply to be closed, and returning to the step of obtaining the current state of the switch element corresponding to the target power supply.

[0033] Exemplarily, after the step of determining that the target power supply supplies power to the load, the method further comprises:

[0034] determining a next power supply of the target power supply according to the power supply sequence, taking the next power supply as a new target power supply, and returning to the step of obtaining the voltage condition on the load bus.

[0035] To solve the above technical problem, the application further provides a power supply system, comprising a controller, a plurality of power supplies and switch elements, the power supplies and the switch elements are in one-to-one correspondence; the controller is connected with input ends of the power supplies, output ends of the power supplies are connected with fixed ends of the switch elements, and movable ends of the switch elements are connected with loads to be powered through a load bus;

[0036] The controller is configured to acquire a voltage condition on the load bus.

[0037] If the voltage condition is detected as no voltage on the load bus, a first target power supply is started, and a switch element corresponding to the first target power supply is controlled to be closed so as to connect the first target power supply to the load bus, wherein the first target power supply is any one of the plurality of power supplies.

[0038] If the voltage condition is detected as voltage on the load bus, a reference phase matching parameter of a power supply connected to the load bus is acquired, a second target power supply is started, and a phase matching parameter of the second target power supply is controlled to be consistent with the reference phase matching parameter, and a switch element corresponding to the second target power supply is controlled to be closed so as to connect the second target power supply to the load bus, wherein the second target power supply is any one of the remaining power supplies except the power supply connected to the load bus.

[0039] To solve the above technical problems, the present application further provides a rolling stock, comprising:

[0040] a memory configured to store a computer program;

[0041] a processor configured to execute the computer program to implement the steps of the power supply control method of alternating current.

[0042] To solve the above technical problems, the present application further provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the power supply control method of alternating current.

[0043] The power supply control method of alternating current provided by the application is applied to a power supply system. Firstly, compared with the way of meeting the power supply demand of a load by increasing the output power of a single power supply, in the method provided by the application, multiple power supplies are used to synchronously supply power to the load, that is, a large-power stable output can be realized by using a lower power supply, and the power supply capacity is greatly improved. The power supply does not need to be redesigned, the failure rate of the power supply is reduced, and the output power of the power supply is controllable by controlling the switching element to connect the power supply to the load bus, thereby avoiding the waste of resources caused by the redesign and manufacture of a large-power output. Secondly, in the process of synchronous power supply and collaborative control of multiple power supplies, the voltage on the load bus is analyzed first. If there is no voltage, a power supply is started, and the switching element corresponding to the power supply is controlled to be closed, so that the power supply supplies power to the load. Further, when it is detected that there is voltage on the load bus, a new power supply is started, and the new power supply is connected to the load bus to collaboratively supply power to the load. Multiple power supplies are connected to the load bus one by one instead of being connected to the load bus at the same time. Moreover, after the new power supply is started, the phase matching parameter of the new power supply is controlled to be consistent with the reference phase matching parameter of the power supply connected to the load bus, and then the switching element is closed, so as to avoid the situation that the output voltage is offset and the output power is affected when the phase of the power supply is not matched, and ensure that the output of multiple power supplies can meet the demand of the load.

[0044] In addition, the application also provides a power supply system, a rolling stock and a computer readable storage medium, which have the same or corresponding technical features and effects as the power supply control method mentioned above. BRIEF DESCRIPTION OF DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0046] Figure 1 A schematic diagram of a power supply system provided by an embodiment of the application;

[0047] Figure 2 A flowchart of a power supply control method of alternating current provided by an embodiment of the application;

[0048] Figure 3 A multi-power supply collaborative control circuit topology structure diagram provided by an embodiment of the application;

[0049] Figure 4A power supply control method provided by an embodiment of the present application has a whole flowchart shown in the figure.

[0050] Figure 5 A structure diagram of a locomotive vehicle provided by an embodiment of the present application. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be clearly and completely described in connection with the drawings of the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, any person skilled in the art can obtain all other embodiments without creative work, which are within the protection scope of the present application.

[0052] The core of the present application is to provide an alternating current power supply control method, a power supply system, a locomotive vehicle and a medium, so as to solve the technical problem that in the related power supply control, in order to meet the power supply demand of the load, the power of the input power supply of the load is correspondingly increased, the power supply module needs to be redesigned, and the power supply is prone to failure and resource waste.

[0053] In order to enable the person skilled in the art to better understand the present application, the present application will be further described in detail below in connection with the drawings and specific embodiments. Figure 1 A schematic diagram of a power supply system provided by an embodiment of the present application is shown in the figure. Figure 1 The figure does not show), a plurality of power supplies and switching elements, the power supplies and the switching elements correspond one by one; the controller is connected with the input end of the power supply, the output end of the power supply is connected with the fixed end of the switching element, and the movable end of the switching element is connected with the load to be powered through the load bus. It is worth noting that the power supply system can be located on one locomotive, or can be located on a plurality of locomotives. The controller can be a network control system. The switching element can be a contactor or a switch. The alternating current power supply control method provided by the present application is applied to the controller in the power supply system. Figure 2 A flowchart of an alternating current power supply control method provided by an embodiment of the present application is shown in the figure. Figure 2 The method comprises the following steps.

[0054] S10: obtaining the voltage condition on the load bus;

[0055] S11: judging whether the voltage condition is no voltage on the load bus; if yes, going to step S12; if no, going to step S13;

[0056] S12: starting the first target power supply; controlling the switching element corresponding to the first target power supply to be closed, so as to connect the first target power supply to the load bus;

[0057] The first target power supply is any one of the plurality of power supplies;

[0058] S13: obtaining a reference phase matching parameter of the power supply connected to the load bus; starting the second target power supply, and controlling the phase matching parameter of the second target power supply to be consistent with the reference phase matching parameter; controlling the switch element corresponding to the second target power supply to be closed, so as to connect the second target power supply to the load bus;

[0059] The second target power supply is any one of the remaining power supplies except the power supply connected to the load bus.

[0060] The power supply mode on the load bus includes but is not limited to single-phase alternating current, three-phase alternating current, etc. The system also has functions of cooperative control operation monitoring, load distribution adjustment, overload / fault protection, etc. The number of power supplies is not limited, as long as the output power of the plurality of power supplies meets the power supply demand of the load. In order to obtain the voltage on the load bus, the load bus voltage sensor can be used for detection. Therefore, the power supply system also includes a load bus voltage sensor. The load bus voltage sensor corresponds to one power supply; or, a plurality of power supplies on the same vehicle correspond to one load bus voltage sensor.

[0061] Obtaining the voltage on the load bus includes:

[0062] Obtaining the voltage signal collected by the load bus voltage sensor, and determining the voltage value according to the voltage signal;

[0063] In the case where the voltage value is less than the preset voltage value, it is determined that the voltage on the load bus is no voltage;

[0064] In the case where the voltage value is greater than or equal to the preset voltage value, it is determined that the voltage on the load bus is voltage.

[0065] The preset voltage is not limited and can be close to 0 or equal to 0. After obtaining the voltage on the load bus through the load bus voltage sensor, if there is no voltage, a power supply is started first, and the power supply is connected to the load bus through the closed switch element. If there is voltage, a new power supply is started, and the switch element corresponding to the new power supply is closed, so that the new power supply is connected to the load bus and cooperates to supply power to the load.

[0066] In order to meet the power supply demand of the load, in the implementation, the power supply system also includes a power detector. The power detector corresponds to one power supply, and the output end of the power supply is connected to the fixed end of the switch element through the power detector. Figure 3A topology diagram of a multi-power supply collaborative control circuit provided in an embodiment of the present invention is shown below. Figure 3 As shown, the power supply, power detector, contactor / switch and load bus voltage sensor are connected in sequence and finally connected to the load bus.

[0067] Before the switching element corresponding to the target power supply is closed, the following is also included:

[0068] The output of the target power supply is detected by a power detector corresponding to the target power supply; wherein the target power supply is either the first target power supply or the second target power supply.

[0069] The closing of the switching element corresponding to the power supply of the control target includes:

[0070] When the output voltage of the target power supply is detected to reach the target voltage value, the corresponding switching element of the target power supply is controlled to close.

[0071] There is no limit to the target voltage value; it can be designed according to actual requirements.

[0072] To ensure the stability of power supply to the load from multiple power sources, in some embodiments, after detecting that the output voltage of the target power source has reached the target voltage value, and before controlling the corresponding switching element of the target power source to close, the following steps are also included:

[0073] Determine if there is an output fault based on the output status; among them, output faults include at least overcurrent faults and voltage fluctuation faults.

[0074] If not, proceed to the step of closing the switching element corresponding to the power supply of the control target;

[0075] If so, the power supply to the target device will be shut off.

[0076] In this method, the switching element corresponding to the target power supply is closed only if there is no output fault. Otherwise, the target power supply is turned off, that is, the target power supply is not used to supply power to the load, thus ensuring the stability of the load when multiple power supplies are used to supply power.

[0077] To avoid multiple power supplies being connected to the load bus simultaneously, which could affect output power due to phase interference, this invention connects the power supplies to the load bus one by one. To improve the efficiency of connecting the power supplies to the load bus, in some embodiments, before obtaining the voltage status on the load bus, the invention further includes: obtaining a pre-set power supply sequence for the multiple power supplies. Starting the target power supply includes: starting the target power supply according to the power supply sequence.

[0078] After determining that the target power supply is for the load, the following steps are also included:

[0079] Determine the next power supply for the target power supply based on the power supply sequence, and use the next power supply as the new target power supply; return to the step of obtaining the voltage status on the load bus.

[0080] If the power supply sequence is not specified, it shall be determined based on the actual situation. Figure 3 The power supply sequence is given from 1 to N. Starting the target power supply according to the power supply sequence allows for a clear understanding of the power supply to be started, improving the efficiency of power supply connection to the load bus.

[0081] After the switching element corresponding to the target power supply is closed, there is a possibility that the closure may fail, resulting in the target power supply not being connected to the load bus. To avoid this situation, after the switching element corresponding to the target power supply is closed, the following steps are also included:

[0082] Obtain the current state of the switching element corresponding to the target power supply;

[0083] If the current state is detected to be closed, the target power supply is determined to supply power to the load;

[0084] If the current state is detected as disconnected, the control shuts down the switching element corresponding to the target power supply and returns to the step of obtaining the current state of the switching element corresponding to the target power supply.

[0085] In this method, after the switch element corresponding to the target power supply is closed, the state of the switch element is continuously detected. If it is not closed, it is controlled to close, thus ensuring that the target power supply is connected to the load bus and meets the power supply requirements of the load.

[0086] The AC power supply control method provided in this invention is applied to a power supply system. First, compared to increasing the output power of a single power supply to meet the load's power requirements, the method uses multiple power supplies to simultaneously supply power to the load. This allows for stable high-power output with lower-power supplies, significantly improving power supply capacity. It eliminates the need to redesign the power supply, reducing its failure rate. Furthermore, the power supply output is controllable by using switching elements to connect the power supplies to the load bus, avoiding resource waste caused by redesigning and manufacturing high-power output power supplies. Second, during the synchronous power supply control process, the voltage on the load bus is analyzed. If there is no voltage, one power supply is activated, and its corresponding switching element is closed, enabling that power supply to supply power to the load. Further, when voltage is detected on the load bus, a new power supply is activated and connected to the load bus to collaboratively supply power to the load. Multiple power supplies are connected to the load bus one by one, rather than simultaneously. Moreover, when a new power supply is started, the corresponding switch element is not directly controlled to close. Instead, the phase matching parameters of the newly started power supply are controlled to be consistent with the reference phase matching parameters of the power supplies connected to the load bus. The switch element is closed only after they are consistent. This avoids the situation where the output voltage cancels each other out due to the phase mismatch of the power supplies, which would affect the output power. This ensures that the output of multiple power supplies can meet the load requirements.

[0087] To enable those skilled in the art to better understand the AC synchronous power supply control method described above, the power supply control method will be further explained below with reference to the accompanying drawings and specific embodiments. Specifically:

[0088] 1) Based on the characteristics of existing locomotives and rolling stock, a multi-power supply circuit topology is established, as shown in the above text. Figure 3 As shown.

[0089] 1) A preset power supply sequence is established. For example, power supply 1 is switched on first, followed by power supply 2, and so on until power supply N is switched on. Alternatively, power supply N can be switched on first, followed by power supply 2, and then power supply 1. This power supply sequence can be preset and adjusted as desired. Differences in the power supply sequence do not affect the scope of protection of this patent.

[0090] 2) A preset power supply sequence is established. For example, power supply 1 is switched on first, followed by power supply 2, and so on until power supply N is switched on. Alternatively, power supply N can be switched on first, followed by power supply 2, and then power supply 1. This power supply sequence can be preset and adjusted as desired. Differences in the power supply sequence do not affect the scope of protection of this invention.

[0091] 3) Power supply activation when there is no power supply on the load bus. The control process is as follows: the load bus sensor is collected and the voltage of the load bus is not available; the power supply with the power supply sequence 1 is started; after the output sensor of power supply 1 detects its own output power supply voltage, it controls the closing of the output contactor / switch of power supply 1 so that the power of power supply 1 can be transferred to the load bus.

[0092] 4) When there is power supply on the load bus, the control process is as follows: the load bus sensor is collected to obtain the load bus voltage; the power supply in the power supply sequence is started, and the power supply in the sequence is actively adjusted to match the "voltage value and phase" of its power supply with the load bus power supply by detecting the output power supply voltage of the power supply's output sensor; when they match, the power supply controls the power supply to close the output contactor / switch so that the power supply's power is transferred to the load bus.

[0093] 5) If a power supply fails during the power supply process, shut off that power supply and disconnect the vehicle's output contactor / switch.

[0094] Figure 4 This is an overall flowchart of a power supply control method provided in an embodiment of the present invention, as shown below. Figure 4 As shown, the method includes:

[0095] S14: Cooperative power supply enabled;

[0096] S15: Determine if it is the power supply sequence K of this power supply; if not, proceed to step S16; if yes, proceed to step S17.

[0097] S16: Waiting for power;

[0098] S17: Determine if there is voltage on the bus load; if not, proceed to step S18; if yes, proceed to step S25.

[0099] S18: Power on this power supply;

[0100] S19: The power supply detector detects the output of this power supply;

[0101] S20: Determine if there is an output fault; if not, proceed to step S21; if yes, proceed to step S28.

[0102] S21: Controls the closing of the power supply output contactor / switch;

[0103] S22: Determine if there is an output fault; if not, proceed to step S23; if yes, proceed to step S24.

[0104] S23: Power supply is complete. Proceed to the next power supply sequence, K=K+1;

[0105] S24: Control the shutdown of this power supply, disconnect the output contactor / switch of this power supply, and proceed to step S23;

[0106] S25: Power supply for starting this power supply;

[0107] S26: The power supply detector of this power supply detects the output power supply voltage and actively adjusts the voltage value and phase of its power supply to be consistent with the load bus power supply.

[0108] S27: Determine if there is an output fault; if not, proceed to step S21; if yes, proceed to step S28.

[0109] S28: Control the power supply of this power supply to be turned off, and proceed to step S23.

[0110] The method provided in this embodiment employs a system and approach for supplying power to the same load from multiple different AC power inputs in a locomotive or rolling stock. This allows two or more power sources to share the power output when the power capacity of a single power source is insufficient, significantly increasing the power output capability. Furthermore, the output power of a single power source does not need to be very large, facilitating simplified and modular design and reducing equipment failure rates.

[0111] The following two examples illustrate the method provided by this invention:

[0112] First example: Suppose a train formation requires a single-phase AC 1000V / 22Hz bus power supply with a capacity of 300kW; however, a single locomotive can only output a single-phase AC 1000V / 22Hz bus power supply with a capacity of 250kW. Therefore, two or more locomotives can be connected in parallel to supply power, without needing to increase the power supply capacity of each locomotive, thus meeting the bus power supply requirement. In this embodiment, it is assumed that the power supply output is controlled collaboratively by the power supplies of two locomotives.

[0113] The two train power supplies work together to control the output of power, and the power supply sequence is agreed upon: the power supply from locomotive 1 is sequence 1; the power supply from locomotive 2 is sequence 2.

[0114] When the train is assembled and the driver operates the power supply, the first power supply (Sequence 1) first checks the voltage on the load bus and identifies it as having no voltage. The first power supply then controls its external power output, and after recognizing that the voltage has reached the target level, it connects the power supply to the load bus via its output contactor / switch. After the first power supply completes its power supply, the second power supply starts its power output and, based on the output voltage detected by its output sensor, actively adjusts its power supply voltage and phase to match the load bus power supply. Then, it connects the power supply to the load bus via its output contactor / switch.

[0115] The second example: Suppose a three-car train requires a three-phase AC 380V / 50Hz bus power supply, with each car requiring 150kW of power, for a total of 450kW. However, each car can only output a single-phase AC 380V / 50Hz bus power supply, with a capacity of only 250kW. Therefore, a coordinated power supply from all three cars can be used to meet the load bus power supply requirements, ensuring that the power supply to all three cars remains unaffected even if one car experiences a power failure. In this embodiment, a three-car train is assumed to be used. The power supply sequence is defined as follows: Car 1 is sequence 1; Car 2 is sequence 2; Car 3 is sequence 3.

[0116] When the train is assembled and the driver authorizes power supply, car 1 first checks the voltage on the load bus and identifies it as having no voltage. Car 1 then controls its own power supply output, and after recognizing the target voltage, it connects the power supply to the load bus via its own output contactor / switch. After car 1 completes its power supply, car 2 starts its own power supply output and actively adjusts its power supply voltage and phase to match the load bus power supply, based on the output voltage detected by its own output sensors. Then, it connects the power supply to the load bus via its own output contactor / switch. The startup process for car 3 is the same as for car 2. If car 2 malfunctions, the power supply from car 3 can be directly connected, ensuring the power supply needs of the entire train are met.

[0117] The method provided by this invention enables stable high-power output using a relatively low-power power supply, significantly improving power supply capacity. It primarily addresses issues such as the coordinated control of synchronous AC power supply from multiple power sources, and can resolve problems related to synchronous power supply to auxiliary systems and simultaneous power supply from multiple locomotives to external systems in existing eight-axle and twelve-axle locomotives.

[0118] The above describes a method for controlling the power supply of alternating current. This embodiment also provides a power supply system, including a controller, multiple power supplies and switching elements, with each power supply and switching element corresponding to the other. The controller is connected to the input terminal of the power supply, the output terminal of the power supply is connected to the stationary terminal of the switching element, and the moving terminal of the switching element is connected to the load to be powered via a load bus.

[0119] The controller is used to obtain the voltage status on the load bus;

[0120] If the detected voltage condition is no voltage on the load bus, the first target power supply is activated; the corresponding switching element of the first target power supply is closed to connect the first target power supply to the load bus; wherein, the first target power supply is any one of multiple power supplies;

[0121] If a voltage condition is detected as voltage on the load bus, the reference phase matching parameters of the power supply connected to the load bus are obtained; the second target power supply is started, and the phase matching parameters of the second target power supply are controlled to be consistent with the reference phase matching parameters; the switching element corresponding to the second target power supply is controlled to close, so as to connect the second target power supply to the load bus; wherein, the second target power supply is any one of the remaining power supplies other than the power supply connected to the load bus.

[0122] The power supply system provided in this embodiment has the same or corresponding technical features as the AC power supply control method described above. The embodiments of the AC power supply control method have been described in detail above, and the embodiments of the power supply system will not be repeated here, and the effects are the same as above.

[0123] In the above embodiments, the AC power supply control method has been described in detail. This invention also provides embodiments corresponding to the AC power supply control device. It should be noted that this invention describes the device embodiments from two perspectives: one based on functional modules, and the other based on hardware.

[0124] The AC power supply control device provided in this embodiment of the invention, based on the functional modules, includes:

[0125] The acquisition module is used to acquire the voltage status on the load bus.

[0126] The judgment module is used to determine whether there is no voltage on the load bus; if so, the first start and control module is triggered; if not, the second start and control module is triggered.

[0127] The first startup and control module is used to start the first target power supply; control the closing of the switching element corresponding to the first target power supply so as to connect the first target power supply to the load bus; wherein, the first target power supply is any one of a plurality of power supplies;

[0128] The second startup and control module acquires the reference phase matching parameters of the power supply connected to the load bus; starts the second target power supply and controls the phase matching parameters of the second target power supply to be consistent with the reference phase matching parameters; controls the corresponding switching element of the second target power supply to close so as to connect the second target power supply to the load bus; wherein, the second target power supply is any one of the remaining power supplies other than the power supply connected to the load bus.

[0129] Since the embodiments of the apparatus and the embodiments of the method correspond to each other, please refer to the description of the embodiments of the method for the embodiments of the apparatus, which will not be repeated here.

[0130] Figure 5 This is a structural diagram of a locomotive and rolling stock provided in an embodiment of the present invention. This embodiment is based on a hardware perspective, such as... Figure 5 As shown, locomotives and rolling stock include:

[0131] Memory 20 is used to store computer programs;

[0132] The processor 21 is used to implement the steps of the AC power supply control method mentioned in the above embodiments when executing a computer program.

[0133] The processor 21 may include one or more processing cores, such as a quad-core processor or an octa-core processor. The processor 21 may be implemented using at least one of the following hardware forms: Digital Signal Processor (DSP), Field-Programmable Gate Array (FPGA), or Programmable Logic Array (PLA). The processor 21 may also include a main processor and a coprocessor. The main processor, also known as the Central Processing Unit (CPU), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, the processor 21 may integrate a Graphics Processing Unit (GPU), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, the processor 21 may also include an Artificial Intelligence (AI) processor, which handles computational operations related to machine learning.

[0134] The memory 20 may include one or more computer-readable storage media, which may be non-transitory. The memory 20 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In this embodiment, the memory 20 is used to store at least the following computer program 201, which, after being loaded and executed by the processor 21, is capable of implementing the relevant steps of the AC power supply control method disclosed in any of the foregoing embodiments. In addition, the resources stored in the memory 20 may also include an operating system 202 and data 203, and the storage method may be temporary or permanent storage. The operating system 202 may include Windows, Unix, Linux, etc. The data 203 may include, but is not limited to, the data involved in the aforementioned AC power supply control method.

[0135] In some embodiments, the locomotive and rolling stock may also include a display screen 22, an input / output interface 23, a communication interface 24, a power supply 25, and a communication bus 26.

[0136] Those skilled in the art will understand that Figure 5 The structures shown do not constitute a limitation on locomotives and rolling stock and may include more or fewer components than those shown.

[0137] The locomotive and rolling stock provided in this embodiment of the invention includes a memory and a processor. When the processor executes the program stored in the memory, it can implement the following method: an alternating current power supply control method, with the same effect as above.

[0138] Finally, the present invention also provides an embodiment corresponding to a computer-readable storage medium. The computer-readable storage medium stores a computer program, which, when executed by a processor, performs the steps described in the above method embodiments.

[0139] It is understood that if the methods in the above embodiments are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and executes all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0140] The computer-readable storage medium provided by this invention includes the aforementioned AC power supply control method, and has the same effect.

[0141] The present invention has provided a detailed description of an alternating current power supply control method, power supply system, locomotive, and medium. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the present invention.

[0142] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A method for controlling the supply of alternating current, characterized in that, A controller is applied in a power supply system, wherein the power supply system further includes multiple power supplies and switching elements, with each power supply and switching element corresponding one-to-one; the controller is connected to the input terminal of the power supply, the output terminal of the power supply is connected to the stationary terminal of the switching element, and the moving terminal of the switching element is connected to the load to be powered via a load bus; the method includes: Obtain the voltage status on the load bus; If the voltage condition is detected as no voltage on the load bus, the first target power supply is activated; the switching element corresponding to the first target power supply is controlled to close, so as to connect the first target power supply to the load bus; wherein, the first target power supply is any one of a plurality of power supplies; If a voltage condition is detected as voltage on the load bus, then the reference phase matching parameter of the power supply connected to the load bus is obtained; the second target power supply is started, and the phase matching parameter of the second target power supply is controlled to be consistent with the reference phase matching parameter; the switching element corresponding to the second target power supply is controlled to close, so as to connect the second target power supply to the load bus; wherein, the second target power supply is any one of the remaining power supplies other than the power supply connected to the load bus.

2. The AC power supply control method according to claim 1, characterized in that, The power supply system also includes a load bus voltage sensor; Each load bus voltage sensor corresponds to one of the power supplies. Alternatively, multiple power supplies on the same locomotive may correspond to one load bus voltage sensor; The process of obtaining the voltage status on the load bus includes: Acquire the voltage signal collected by the load bus voltage sensor, and determine the voltage value based on the voltage signal; If the detected voltage value is lower than the preset voltage value, the voltage condition on the load bus is determined to be no voltage. If a voltage value is detected that is greater than or equal to the preset voltage value, the voltage condition on the load bus is determined to be that there is voltage.

3. The AC power supply control method according to claim 2, characterized in that, The power supply system also includes a power detector; the power detector corresponds one-to-one with the power supply, and the output terminal of the power supply is connected to the stationary terminal of the switching element through the power detector. Before the switching element corresponding to the target power supply is closed, the following is also included: The output of the target power supply is detected by a power detector corresponding to the target power supply; wherein the target power supply is either the first target power supply or the second target power supply. The closing of the switching element corresponding to the power supply of the control target includes: When the output voltage of the target power supply is detected to have reached the target voltage value, the corresponding switching element of the target power supply is controlled to close.

4. The AC power supply control method according to claim 3, characterized in that, Before closing the corresponding switching element of the target power supply after detecting that the output voltage of the target power supply has reached the target voltage value, the process further includes: Determine whether an output fault exists based on the output status; wherein, the output fault includes at least overcurrent fault and voltage fluctuation fault; If not, proceed to the step of closing the switching element corresponding to the power supply of the control target; If so, then control the target power supply to shut down.

5. The AC power supply control method according to claim 3 or 4, characterized in that, Before obtaining the voltage status on the load bus, the following steps are also included: Obtain the pre-set power supply sequence of multiple power sources; Starting the target power supply includes: Start the target power supply according to the power supply sequence.

6. The AC power supply control method according to claim 5, characterized in that, After the switching element corresponding to the target power supply is closed, the following is also included: Obtain the current state of the switching element corresponding to the target power supply; If the current state is detected to be closed, the target power supply is determined to be supplying power to the load; If the current state is detected to be disconnected, the switch element corresponding to the target power supply is turned off, and the process returns to the step of obtaining the current state of the switch element corresponding to the target power supply.

7. The AC power supply control method according to claim 6, characterized in that, After determining that the target power supply is for the load, the process further includes: Determine the next power supply for the target power supply according to the power supply sequence, and use the next power supply as the new target power supply; return to the step of obtaining the voltage status on the load bus.

8. A power supply system, characterized in that, It includes a controller, multiple power supplies and switching elements, with each power supply and switching element corresponding to another; the controller is connected to the input terminal of the power supply, the output terminal of the power supply is connected to the stationary terminal of the switching element, and the moving terminal of the switching element is connected to the load to be powered through a load bus; The controller is used to acquire the voltage status on the load bus; If the voltage condition is detected as no voltage on the load bus, the first target power supply is activated; the switching element corresponding to the first target power supply is controlled to close, so as to connect the first target power supply to the load bus; wherein, the first target power supply is any one of a plurality of power supplies; If a voltage condition is detected as voltage on the load bus, then the reference phase matching parameter of the power supply connected to the load bus is obtained; the second target power supply is started, and the phase matching parameter of the second target power supply is controlled to be consistent with the reference phase matching parameter; the switching element corresponding to the second target power supply is controlled to close, so as to connect the second target power supply to the load bus; wherein, the second target power supply is any one of the remaining power supplies other than the power supply connected to the load bus.

9. A locomotive and rolling stock, characterized in that, include: Memory, used to store computer programs; A processor, configured to implement the steps of the AC power supply control method as described in any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the AC power supply control method as described in any one of claims 1 to 7.

Images