Power supply system and control method, control device and master controller thereof

Abstract

According to the power supply system and the control method, the control device and the master controller thereof, the monitoring module is arranged in the power supply cabinet and is used for monitoring the change of the operating parameters of the alternating-current power distribution module and the direct-current power distribution module in the power supply cabinet, so that the commercial power supply condition of the power supply cabinet and the operating condition of equipment connected with the output end of the power supply cabinet can be determined in time; changes of commercial power supply conditions and / or equipment operation conditions are monitored through the operation parameters and the abnormal operation conditions, when abnormity exists, the power distribution condition of at least one target power distribution module corresponding to the abnormal operation conditions can be adjusted to interrupt fault-related operation processes in time, fault removal is fast, and the fault handling efficiency is improved. The normal operation of other processes irrelevant to the fault is not influenced, the loss of devices in the power cabinet caused by the fault is reduced, and the control cost is reduced.

Description

Technical Field

[0001] This application relates to the field of power supply technology, and in particular to a power supply system and its control method, control device and main controller. Background Technology

[0002] With the development of the communications industry, the continuous upgrading of communication power supply products, and the gradual expansion of communication network base stations, power supply cabinets, as important backup power protection equipment, play a crucial role. When a power supply cabinet malfunctions, the common approach is to rely on the blowing of electric fuses to protect the power supply cabinet and its output-connected equipment. This is followed by manual troubleshooting and repair by staff. However, this method is inefficient and affects the normal operation of the power supply cabinet. Therefore, how to quickly troubleshoot power supply cabinet malfunctions has become a key research focus. Summary of the Invention

[0003] This application provides a power supply system and its control method, control device and main controller to solve the above-mentioned technical problems.

[0004] In a first aspect, this application provides a control method for a power system, the method being applied to a main controller, the main controller being communicatively connected to at least one power cabinet, the power cabinet including an AC power distribution module, a conversion module, a DC power distribution module, a battery module, and a monitoring module;

[0005] The input terminal of the AC power distribution module is electrically connected to the AC power source, the output terminal of the AC power distribution module is electrically connected to the input terminal of the conversion module, the output terminal of the conversion module is electrically connected to the input terminal of the DC power distribution module, and the output terminal of the conversion module is electrically connected to the battery module and the load device.

[0006] The monitoring module is electrically connected to the AC power distribution module and the DC power distribution module;

[0007] The method includes:

[0008] The operating parameters of each power distribution module are obtained from the monitoring module; the operating parameters include at least one of operating current and operating voltage.

[0009] When the operating parameters meet the abnormal operating conditions, the power distribution status of at least one target power distribution module corresponding to the abnormal operating conditions is adjusted.

[0010] The target power distribution module includes at least one of the AC power distribution module and the DC power distribution module.

[0011] In the above technical solution, the power cabinet is equipped with a monitoring module to monitor changes in the operating parameters of the AC and DC power distribution modules in the power cabinet. This allows for timely determination of the mains power supply status of the power cabinet and the operating status of the equipment connected to the output terminals of the power cabinet. By monitoring changes in the mains power supply status and / or equipment operating status through operating parameters and abnormal operating conditions, the power distribution status of at least one target power distribution module corresponding to the abnormal operating conditions can be adjusted when an abnormality occurs. This allows for timely interruption of fault-related operating processes, resulting in rapid fault resolution without affecting the normal operation of other processes unrelated to the fault. Furthermore, it reduces the wear and tear on components in the power cabinet caused by the fault and lowers control costs.

[0012] Optionally, the conversion module includes at least one rectifier circuit, and the AC power distribution module includes at least one set of AC contactors, the at least one set of AC contactors corresponding to the at least one rectifier circuit, and the AC contactors being connected in series between the AC power supply and the corresponding rectifier circuit.

[0013] The operating parameters include the three-phase AC voltage input to each group of AC contactors;

[0014] When the operating parameters meet abnormal operating conditions, adjusting the power distribution status of at least one target power distribution module corresponding to the abnormal operating conditions includes:

[0015] The AC contactor corresponding to the three-phase AC voltage that does not meet the preset power supply conditions is turned off in order to adjust the AC power capacity connected to the power cabinet.

[0016] Optionally, shutting off the AC contactor corresponding to a three-phase AC voltage that does not meet the preset power supply conditions includes:

[0017] Turn off the AC contactor corresponding to the missing phase of the three-phase AC voltage;

[0018] Turn off AC contactors whose three-phase AC voltage amplitude is not within the preset voltage range.

[0019] In the above technical solution, by sampling the operating parameters of the AC contactor in the AC power distribution module through the monitoring module, the main controller can promptly shut off the relevant AC contactor when it detects a phase loss or abnormal amplitude of the three-phase AC power during the mains power supply process, thereby stopping the impact of the mains power on the output voltage waveform quality of the rectifier circuit and the stable operation of the downstream equipment, and ensuring the power supply stability of the power system.

[0020] Optionally, the DC power distribution module includes at least one first controllable switching device and at least one second controllable switching device;

[0021] The battery module includes at least one battery pack;

[0022] Each of the first controllable switching devices corresponds to at least one battery pack; the first terminal of the first controllable switching device is electrically connected to the output terminal of the conversion module, and the second terminal is electrically connected to the corresponding battery pack;

[0023] Each of the second controllable switching devices corresponds to at least one load device; the first terminal of the second controllable switching device is electrically connected to the output terminal of the conversion module, and the second terminal is electrically connected to the corresponding load device;

[0024] The operating parameters include the operating parameters of the first terminal of each controllable switching device and the operating parameters of the output terminal of the conversion module;

[0025] When the operating parameters meet abnormal operating conditions, adjusting the power distribution status of at least one target power distribution module corresponding to the abnormal operating conditions includes:

[0026] When the operating parameters meet the abnormal operating conditions, the state of the controllable switching device corresponding to the abnormal operating conditions is modified.

[0027] The state of the controllable switching device includes an on state or an off state.

[0028] Optionally, when the operating parameters meet the abnormal operating conditions, modifying the state of the controllable switching device corresponding to the abnormal operating conditions includes:

[0029] Based on the first operating current and first operating voltage sampled by the monitoring module at the first terminal of each controllable switching device, the operating power of the device electrically connected to the controllable switching device is determined; wherein, the device includes a load or a battery pack.

[0030] Based on the second operating current and the second operating voltage sampled by the monitoring module at the output terminal of the conversion module, the total power output by the conversion module is determined.

[0031] When the sum of the operating power of the device electrically connected to the controllable switch and the total output power of the conversion module is greater than a preset threshold, the controllable switch of the device with the largest absolute value of operating power is disconnected one by one until the sum of the operating power of the device electrically connected to the controllable switch and the total output power of the conversion module is less than or equal to the preset threshold.

[0032] In the above technical solution, the main controller monitors whether the battery pack or load has a fault based on the correlation between the output power of the conversion module and the operating power of the battery pack and load connected to the output terminal of the conversion module. By turning off the controllable switching devices corresponding to the battery pack or load that affect the correlation, the impact of the fault on the power cabinet is interrupted in a timely manner. Compared with the method of breaking the fuse in related technologies, the fault troubleshooting efficiency is improved.

[0033] Optionally, when the operating parameters meet the abnormal operating conditions, modifying the state of the controllable switching device corresponding to the abnormal operating conditions includes:

[0034] Based on the first operating current and first operating voltage sampled by the monitoring module at the first terminal of each first controllable switch device, the battery capacity of the battery pack electrically connected to each first controllable switch device is determined.

[0035] When the AC power distribution module is turned on, the first controllable switching device corresponding to a battery capacity greater than or equal to the first battery capacity threshold is turned off.

[0036] Optionally, after determining the battery capacity of the battery pack electrically connected to each of the first controllable switching devices, the method further includes:

[0037] When the AC power distribution module is turned off, the first controllable switching device corresponding to the battery capacity greater than the second battery capacity threshold is turned on.

[0038] When the battery capacity drops to the second battery capacity threshold, the first controllable switching device is turned off.

[0039] In the above technical solution, the main controller determines the battery capacity of each battery pack through the operating parameters of the battery module, can adjust the working state of the battery pack based on the conduction status of the AC power distribution module, and protects the battery pack from damage caused by overcharging or undercharging by setting a first battery capacity threshold and a second battery capacity threshold.

[0040] Secondly, this application provides a power system, including a main controller and at least one power cabinet communicatively connected thereto, the power cabinet including an AC power distribution module, a conversion module, a DC power distribution module, a battery module, and a monitoring module;

[0041] The input terminal of the AC power distribution module is electrically connected to the AC power source, the output terminal of the AC power distribution module is electrically connected to the input terminal of the conversion module, the output terminal of the conversion module is electrically connected to the input terminal of the DC power distribution module, and the output terminal of the conversion module is electrically connected to the battery module and the load device.

[0042] The monitoring module is electrically connected to the AC power distribution module and the DC power distribution module;

[0043] The master controller performs any of the control methods described in the first aspect.

[0044] Optionally, the power cabinet is equipped with an air conditioner, and the AC power distribution module is used to supply power to the air conditioner;

[0045] The monitoring module is used to sample the ambient temperature of the power cabinet;

[0046] The main controller is used to adjust the temperature to be adjusted of the air conditioner based on the ambient temperature of the power cabinet.

[0047] Thirdly, this application provides a control device for a power supply system, comprising:

[0048] The acquisition module is used to obtain the operating parameters of each power distribution module from the monitoring module; the operating parameters include at least one of operating current and operating voltage; the power distribution module is an AC power distribution module or a DC power distribution module in the power system;

[0049] The processing module is used to adjust the power distribution status of at least one target power distribution module corresponding to the abnormal operating conditions when the operating parameters meet the abnormal operating conditions.

[0050] The target power distribution module includes at least one of the AC power distribution module and the DC power distribution module.

[0051] Fourthly, this application provides a master controller, comprising:

[0052] Processor, memory, communication interface;

[0053] The memory is used to store the executable instructions of the processor;

[0054] The processor is configured to perform any of the methods involved in the first aspect by executing the executable instructions.

[0055] This application provides a power supply system and its control method, control device, and main controller. The power supply cabinet is equipped with a monitoring module for monitoring changes in the operating parameters of the AC and DC power distribution modules in the power supply cabinet. This allows for timely determination of the mains power supply status of the power supply cabinet and the operating status of the equipment connected to the output terminal of the power supply cabinet. By monitoring changes in the mains power supply status and / or equipment operating status through operating parameters and abnormal operating conditions, the power distribution status of at least one target power distribution module corresponding to the abnormal operating conditions can be adjusted when an abnormality occurs. This allows for timely interruption of fault-related operating processes, resulting in rapid fault resolution without affecting the normal operation of other processes unrelated to the fault. Furthermore, it reduces the wear and tear on components in the power supply cabinet caused by the fault and lowers control costs. Attached Figure Description

[0056] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0057] Figure 1 This is a schematic diagram of the power supply system provided in accordance with an exemplary embodiment of this application;

[0058] Figure 2This is a flowchart illustrating a control method for a power supply system provided in an exemplary embodiment of this application.

[0059] Figure 3 This is a flowchart illustrating a control method for a power system provided in another exemplary embodiment of this application;

[0060] Figure 4 This is a flowchart illustrating a control method for a power system provided in another exemplary embodiment of this application;

[0061] Figure 5 This is a schematic diagram of the structure of a control device for a power system provided in an exemplary embodiment of this application;

[0062] Figure 6 This is a schematic diagram of a master controller provided according to an exemplary embodiment of this application.

[0063] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0064] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0065] With the development of the communications industry, the continuous upgrading of communication power supply products, and the gradual expansion of communication network base stations, power supply cabinets, as important backup power protection equipment, play a crucial role. When a power supply cabinet malfunctions, the common approach is to rely on the blowing of electric fuses to protect the power supply cabinet and its output-connected equipment. This is followed by manual troubleshooting and repair by staff. However, this method is inefficient and affects the normal operation of the power supply cabinet. Therefore, how to quickly troubleshoot power supply cabinet malfunctions has become a key research focus.

[0066] To address the aforementioned problems, this application provides a power supply system and its control method, control device, and main controller. The technical concept of this application is as follows: the main controller remotely controls multiple power supply cabinets. Based on the DC and AC side operating parameters sampled and uploaded by the monitoring modules in each power supply cabinet, the operating status of the power supply cabinets is monitored. When abnormal operating parameters are detected, the power distribution of the power distribution modules in the power supply cabinet can be adjusted promptly based on these parameters. This proactively cuts off the faulty operating process, rather than passively waiting for the capacitor wire to blow and cut off the fault, thus improving fault handling efficiency and effectively preventing damage to the normal operation of the power supply cabinet from the fault.

[0067] Figure 1 This is a schematic diagram of the power supply system provided in an exemplary embodiment of this application, as shown below. Figure 1 As shown, it includes a main controller 00 and at least one power supply cabinet that is communicatively connected to the main controller 00.

[0068] The power cabinet includes an AC power distribution module 11, a conversion module 12, a DC power distribution module 13, a battery module S1, and a monitoring module 14.

[0069] The input terminal of the AC power distribution module 11 is electrically connected to the mains power supply 10, and is used to adjust the capacity of the AC power connected to the power cabinet and output the corresponding AC power signal.

[0070] The input terminal of the conversion module 12 is electrically connected to the output terminal of the AC power distribution module 11, and is used to convert the AC signal and output a DC signal with a target voltage value.

[0071] The input terminal of the DC power distribution module 13 is electrically connected to the output terminal of the conversion module 12, and the output terminal is electrically connected to the battery module S1 and the load 15, which is used to adjust the connection status between the battery module S1, the conversion module 12, and the load 15.

[0072] The monitoring module 14 is electrically connected to the DC power distribution module 13 and is used to sample the input power and output power of the DC power distribution module 13 in order to monitor whether the load 15 and the power module connected to the power cabinet have malfunctioned.

[0073] The monitoring module 14 is also electrically connected to the AC power distribution module 11 to sample the operating voltage and operating current values ​​of the AC power distribution module 11, thereby monitoring whether the AC power distribution module 11 is abnormally connected to the mains power.

[0074] The monitoring module 14 is communicatively connected to the main controller 00 and is used to upload the sampled data to the main controller 00 so that when the operation of each power distribution module meets the abnormal operating conditions, the main controller 00 adjusts the power distribution status of at least one target power distribution module corresponding to the abnormal operating conditions, and cuts off the generating equipment and interrupts the fault-related process in a timely manner.

[0075] The target power distribution module includes at least one of AC power distribution module 11 and DC power distribution module 13.

[0076] In some embodiments, the DC power distribution module 13 includes an AC surge protection circuit and a circuit breaker, wherein the AC surge protection circuit is used to release a large amount of pulse energy generated on the AC side circuit due to lightning strike induction, so as to protect the devices on the AC side circuit from damage.

[0077] Circuit breakers are used to prevent damage to power cabinet components when the AC current value is too high.

[0078] In some embodiments, the target power distribution module further includes AC contactors. By controlling the on / off state of the AC contactors, the capacity of the AC power connected to the power cabinet can be adjusted. The more AC contactors that are turned on, the greater the capacity of the AC power connected to the power cabinet.

[0079] In some embodiments, the main controller 00 determines the AC side's connection to mains power by sampling at least one of the voltage and current values ​​on the AC side, thereby adjusting the on / off state of the circuit breakers and AC contactors in the DC power distribution module 13. Specifically, when the detected voltage or current value is determined to be abnormal, the corresponding circuit breaker or AC contactor is shut off; when the detected voltage or current value is determined to be normal, the on / off state of the circuit breaker or AC contactor is adjusted based on the required connection capacity.

[0080] The conversion module 12 includes at least one rectifier circuit 121 for converting AC mains power into DC power.

[0081] The AC power distribution module 11 includes at least one set of AC contactors, and at least one set of AC contactors corresponds to at least one rectifier circuit 121. The AC contactors are connected in series between the AC power source and the corresponding rectifier circuit 121. Figure 1 In the circuit structure shown, the AC power distribution module 11 includes two sets of AC contactors: a first set of AC contactors K1 and a second set of AC contactors K2. The rectifier circuit 121 corresponding to each AC contactor has a capacity of 50A. When both sets of AC contactors are fully engaged, the current power supply cabinet provides a capacity of 100A. The number of AC contactors in this example is only one example; the actual number of AC contactors depends on the design capacity of the power supply cabinet.

[0082] More specifically, each rectifier circuit 121 includes a three-phase power input terminal, which is electrically connected to three AC contactors and three circuit breakers respectively.

[0083] In some embodiments, among the three-phase input terminals of the plurality of rectifier circuits 121, the input terminals of the same phase can be electrically connected to the same AC contactor or circuit breaker, or they can be electrically connected to the plurality of AC contactors or circuit breakers in a one-to-one correspondence.

[0084] In some embodiments, the conversion module 12 further includes at least one chopper circuit 122 for converting the voltage value of the DC power output by the rectifier circuit 121 into a target voltage value.

[0085] The input terminal of at least one chopper circuit 122 can be electrically connected to the output terminal of at least one rectifier circuit 121 to perform voltage regulation.

[0086] At least one chopper circuit 122 may also connect its input terminal to a point after the output terminal of at least one rectifier circuit 121 is electrically connected to that point.

[0087] In some embodiments, the output of at least one chopper circuit 122 is electrically connected to a single point, serving as the output of the conversion module 12.

[0088] DC power distribution module 13 includes at least one first controllable switching device K4 and at least one second controllable switching device K3, and battery module S1 includes at least one battery pack;

[0089] Each first controllable switch device K4 corresponds to at least one battery pack. For example, the number of first controllable switch devices K4 can be set to be the same as the number of battery packs, and the first controllable switch devices K4 correspond one-to-one to control the connection between the power supply pack and the conversion module 12.

[0090] For example, a first controllable switch device K4 can be set up, and multiple battery packs are connected in parallel. The first controllable switch device K4 is set between the positive terminal of multiple power supply packs and the output terminal of the conversion module 12. The first controllable switch device K4 manages the connection status of multiple power supply packs and conversion module 12.

[0091] More specifically, the first terminal of the first controllable switching device K4 is electrically connected to the output terminal of the conversion module 12, and the second terminal is electrically connected to the corresponding battery pack. The first controllable switching device K4 can be a contactor. In some embodiments, a fuse FU2 is also provided between the first controllable switching device K4 and the battery pack.

[0092] like Figure 1 As shown, the sampling point of the first controllable switching device K4 is point C.

[0093] The configuration relationship between the second controllable switching device K3 and the load 15 is similar to that between the first controllable switching device K4 and the corresponding battery pack, and will not be repeated here. The second controllable switching device K3 can be a relay or a controllable transistor.

[0094] Each second controllable switching device K3 corresponds to at least one load 15; the first end of the second controllable switching device K3 is electrically connected to the output end of the conversion module 12, and the second end is electrically connected to the corresponding load 15; in some embodiments, a fuse FU1 is also provided between the second controllable switching device K3 and the load 15.

[0095] like Figure 1 As shown, the sampling point of the second controllable switching device K3 is point B.

[0096] The main controller 00 can be used to determine whether the load 15 or battery corresponding to the controllable switch device is faulty based on the operating parameters of the first controllable switch device K4, the second controllable switch device K3 and the operating parameters of the front-end output terminal.

[0097] In some embodiments, the DC power distribution module 13 further includes a DC surge protector for dissipating large amounts of pulse energy generated by lightning strike induction, thereby protecting devices on the DC side circuit from damage.

[0098] The monitoring module 14 includes a voltage sampler, a current sampler, and a communication module.

[0099] A voltage sampler is set at a preset position in the AC power distribution module 11 between the input terminal of the conversion circuit and the mains power supply to monitor the voltage value on the AC side.

[0100] The voltage sampler can also be set at the output of the conversion circuit, or at one end where each controllable switching device is connected to the corresponding control equipment, such as the second end. It is used to monitor the voltage value on the DC side.

[0101] In some embodiments, the voltage sampler may use a voltage divider circuit to sample the voltage.

[0102] The current sampler and voltage sampler are located in the same place, so we will not go into details here.

[0103] In some embodiments, the current sampler may use a sampling resistor connected in series in the circuit to convert the current value of the circuit it is in into a sampling voltage value.

[0104] In other embodiments, the current sampler may employ a Hall sensor to sample current values ​​without breaking the wire.

[0105] The communication module is connected to each current sampler and voltage sampler, which can be either electrical or wireless.

[0106] The communication module is connected to the main controller 00 and is used to upload the data sampled by the sampler to the main controller 00 in real time, so that the main controller 00 can monitor the operation of the power cabinet based on the obtained data and make corresponding control strategies in a timely manner.

[0107] In some embodiments, the communication interface between the communication module and each sampler and the main controller 00 adopts an RS485 interface, and the communication interface between the main controller 00 and the DC power distribution module 13 and the AC power distribution module 11 also adopts an RS485 interface. The RS485 interface is only one example; other communication protocols may also be used, and no specific limitation is made here.

[0108] In some embodiments, an air conditioner 16 is provided in the power cabinet, and the AC power distribution module 12 is used to supply power to the air conditioner 16.

[0109] Monitoring module 14 is used to sample the ambient temperature of the power cabinet;

[0110] The main controller 00 is used to adjust the temperature to be adjusted of the air conditioner 16 based on the ambient temperature of the power cabinet, so that the temperature to be adjusted of the air conditioner 16 follows the ambient temperature and the temperature adjustment target. Compared with the fixed temperature adjustment value in related technologies, this method is more flexible and more adaptable.

[0111] The control method of the power supply system provided in this application will be explained below through several embodiments.

[0112] Figure 2 This is a flowchart illustrating a control method for a power system according to an exemplary embodiment of this application. The main controller is the execution entity of the control method, and the method includes:

[0113] S101. Obtain the operating parameters of each power distribution module from the monitoring module.

[0114] Operating parameters include at least one of operating current and operating voltage.

[0115] Each power distribution module includes a DC power distribution module and an AC power distribution module.

[0116] After obtaining the operating parameters, the monitoring module transmits them to the main controller. The structure of the monitoring module, the sampling method, and the process of transmitting data to the main controller have been explained in the previous embodiments and will not be repeated here.

[0117] S102. When the operating parameters meet the abnormal operating conditions, adjust the power distribution status of at least one target power distribution module corresponding to the abnormal operating conditions.

[0118] Abnormal operating conditions include the voltage range of at least one sampling point and the current range of at least one sampling point when a fault occurs.

[0119] Faults occurring at different locations will cause different sampling points to meet the abnormal operating conditions corresponding to the fault. The main controller can determine the fault by the operating parameters that meet the abnormal operating conditions, and then adjust the power distribution status of at least one target power distribution module according to the preset processing strategy.

[0120] More specifically, the corresponding controllable switching devices in the corresponding DC power distribution module and AC power distribution module are adjusted to change the current state, wherein the controllable switching devices include an on state or an off state.

[0121] The controllable switching devices in the DC power distribution module include the first controllable switching device and the second controllable switching device in the aforementioned embodiments.

[0122] The controllable switching devices in the AC power distribution module include the circuit breaker and AC contactor in the aforementioned embodiments.

[0123] The target power distribution module includes at least one of an AC power distribution module and a DC power distribution module.

[0124] In the above technical solution, the power cabinet is equipped with a monitoring module to monitor changes in the operating parameters of the AC and DC power distribution modules in the power cabinet. This allows for timely determination of the mains power supply status of the power cabinet and the operating status of the equipment connected to the output terminals of the power cabinet. By monitoring changes in the mains power supply status and / or equipment operating status through operating parameters and abnormal operating conditions, the power distribution status of at least one target power distribution module corresponding to the abnormal operating conditions can be adjusted when an abnormality occurs. This allows for timely interruption of fault-related operating processes, resulting in rapid fault resolution without affecting the normal operation of other processes unrelated to the fault. Furthermore, it reduces the wear and tear on components in the power cabinet caused by the fault and lowers control costs.

[0125] The control methods for the main controller will be explained in detail below for different faults.

[0126] In the control process targeting the AC side, the control methods of the master controller include, for example: Figure 3 The steps shown are as follows:

[0127] S101. Obtain the operating parameters of each power distribution module from the monitoring module; the operating parameters include at least one of the operating current and operating voltage.

[0128] The operating parameters include the three-phase AC voltage input to each group of AC contactors.

[0129] S1021. Turn off the AC contactor corresponding to the three-phase AC voltage that does not meet the preset power supply conditions, so as to adjust the AC power capacity connected to the power cabinet.

[0130] In some embodiments, the AC contactor corresponding to the missing phase of the three-phase AC voltage is turned off.

[0131] In other embodiments, AC contactors whose three-phase AC voltage amplitude is not within a preset voltage range are turned off. Specifically, if the voltage amplitude is less than the minimum value of the preset voltage range or greater than the maximum value of the preset voltage range, it is determined that the sampling terminal is connected to an abnormal mains power supply, and the corresponding AC contactor needs to be turned off.

[0132] In the above technical solution, by sampling the operating parameters of the AC contactor in the AC power distribution module through the monitoring module, the main controller can promptly shut off the relevant AC contactor when it detects a phase loss or abnormal amplitude of the three-phase AC power during the mains power supply process, thereby stopping the impact of the mains power on the output voltage waveform quality of the rectifier circuit and the stable operation of the downstream equipment, and ensuring the power supply stability of the power system.

[0133] In the control process targeting the DC side, the control methods of the main controller include, for example: Figure 4 The steps shown are as follows:

[0134] S101. Obtain the operating parameters of each power distribution module from the monitoring module; the operating parameters include at least one of the operating current and operating voltage.

[0135] The operating parameters include the operating parameters at the first terminal of each controllable switching device and the operating parameters at the output terminal of the conversion module. For example... Figure 1 As shown, the sampling point at the output of the conversion module is point A, the sampling point of the first controllable switch device K4 is point C, and the sampling point of the second controllable switch device K3 is point B.

[0136] S1022. When the operating parameters meet the abnormal operating conditions, modify the state of the controllable switching device corresponding to the abnormal operating conditions.

[0137] The states of a controllable switching device include either an on state or an off state.

[0138] In some embodiments, the main controller can determine the operating power of the device electrically connected to the controllable switching device based on the first operating current and the first operating voltage sampled by the monitoring module at the first terminal of each controllable switching device; wherein the device includes a load or a battery pack.

[0139] The operating power of the equipment is the product of the first operating current and the first operating voltage.

[0140] The main controller also determines the total power output of the conversion module based on the second operating current and the second operating voltage sampled by the monitoring module at the output terminal of the conversion module; the total power is the product of the second operating current and the second operating voltage.

[0141] Ideally, the sum of the operating power of the device corresponding to the controllable switching device and the total output power of the conversion module should be 0. To improve the robustness of the control, the DC power supply is considered to be normal and no fault has occurred when the sum of the operating power of the device corresponding to the controllable switching device and the total output power of the conversion module is less than or equal to a preset threshold.

[0142] When a fault occurs on the DC side, such as a short circuit, the current will change abruptly, and the corresponding voltage value will also increase accordingly. This can easily cause the total power on the DC side to exceed a preset threshold, requiring the corresponding controllable switching devices to be disconnected based on the power changes at each sampling point. In this case, the power value at the sampling point corresponding to the faulty device is relatively high.

[0143] More specifically, when the sum of the operating power of the device electrically connected to the controllable switching device and the total output power of the conversion module is greater than a preset threshold, the controllable switching devices of the devices with the largest absolute value of operating power are disconnected one by one until the sum of the operating power of the device electrically connected to the controllable switching device and the total output power of the conversion module is less than or equal to the preset threshold.

[0144] In some cases, when mains power is connected, the conversion circuit supplies power to the battery module and the load. Under normal circumstances, the difference between the output power of the conversion circuit and the sum of the absolute values ​​of the power supplied by the battery module and the load is less than or equal to a preset threshold.

[0145] In other cases, when the mains power is not connected, the power output of the conversion circuit is 0, the battery module supplies power to the load, and the difference between the power output of the battery module and the power consumed by the load is less than or equal to a preset threshold.

[0146] When the load is faulty, the power value obtained by the sampling value calculation of the second controllable switching device corresponding to the load will suddenly increase, and the second controllable switching device needs to be turned off; when the battery is faulty, the power value obtained by the sampling value calculation of the first controllable switching device corresponding to the battery will suddenly increase, and the first controllable switching device needs to be turned off.

[0147] In the above technical solution, the main controller monitors whether the battery pack or load has a fault based on the correlation between the output power of the conversion module and the operating power of the battery pack and load connected to the output terminal of the conversion module. By turning off the controllable switching devices corresponding to the battery pack or load that affect the correlation, the impact of the fault on the power cabinet is interrupted in a timely manner. Compared with the method of breaking the fuse in related technologies, the fault troubleshooting efficiency is improved.

[0148] In other embodiments, the main controller can determine the battery capacity of the battery pack electrically connected to each first controllable switch device based on the first operating current and first operating voltage sampled by the monitoring module at the first terminal of each first controllable switch device.

[0149] When the AC power distribution module is turned on, the first controllable switching device corresponding to a battery capacity greater than or equal to the first battery capacity threshold is turned off.

[0150] The first battery capacity threshold is the maximum value of the battery's rechargeable capacity.

[0151] The main controller can also turn on the first controllable switching device corresponding to a battery capacity greater than the second battery capacity threshold when the AC power distribution module is turned off;

[0152] When the battery capacity drops to the second battery capacity threshold, the first controllable switching device is turned off.

[0153] The second battery capacity threshold is the minimum value of the battery's discharge capacity.

[0154] In the above technical solution, the main controller determines the battery capacity of each battery pack through the operating parameters of the battery module, can adjust the working state of the battery pack based on the conduction status of the AC power distribution module, and protects the battery pack from damage caused by overcharging or undercharging by setting a first battery capacity threshold and a second battery capacity threshold.

[0155] Figure 5 This is a schematic diagram of the structure of a control device for a power system provided according to an exemplary embodiment of this application, as shown below. Figure 5 As shown, the control device 200 of the power supply system includes:

[0156] The acquisition module 201 is used to obtain the operating parameters of each power distribution module from the monitoring module; the operating parameters include at least one of the operating current and operating voltage; the power distribution module is an AC power distribution module or a DC power distribution module in the power supply system;

[0157] The processing module 202 is used to adjust the power distribution status of at least one target power distribution module corresponding to the abnormal operating conditions when the operating parameters meet the abnormal operating conditions.

[0158] The target power distribution module includes at least one of an AC power distribution module and a DC power distribution module.

[0159] In some embodiments, the acquisition module 201 is specifically used for:

[0160] Obtain the three-phase AC voltage input to each group of AC contactors.

[0161] Processing module 202 is specifically used for:

[0162] The AC contactor corresponding to the three-phase AC voltage that does not meet the preset power supply conditions is shut off in order to adjust the AC power capacity connected to the power cabinet.

[0163] In some embodiments, the processing module 202 is specifically used for:

[0164] Turn off the AC contactor corresponding to the missing phase of the three-phase AC voltage;

[0165] Turn off AC contactors whose three-phase AC voltage amplitude is not within the preset voltage range.

[0166] In some embodiments, the acquisition module 201 is specifically used for:

[0167] Obtain the operating parameters of the first terminal of each controllable switching device and the operating parameters of the output terminal of the conversion module.

[0168] Processing module 202 is specifically used for:

[0169] When the operating parameters meet the abnormal operating conditions, modify the state of the controllable switching device corresponding to the abnormal operating conditions;

[0170] The states of controllable switching devices include on or off states.

[0171] In some embodiments, the processing module 202 is specifically used for:

[0172] Based on the first operating current and first operating voltage sampled by the monitoring module at the first terminal of each controllable switching device, the operating power of the device electrically connected to the controllable switching device is determined; wherein, the device includes a load or a battery pack.

[0173] The total output power of the conversion module is determined based on the second operating current and the second operating voltage sampled by the monitoring module at the output terminal of the conversion module.

[0174] When the absolute value of the difference between the sum of the operating power of the devices electrically connected to the controllable switching device and the total output power of the conversion module is greater than a preset threshold, the controllable switching device of the device with the largest absolute value of operating power is disconnected one by one until the absolute value of the difference between the sum of the operating power of the devices electrically connected to the controllable switching device and the total output power of the conversion module is less than or equal to the preset threshold.

[0175] In some embodiments, the processing module 202 is specifically used for:

[0176] Based on the first operating current and first operating voltage sampled by the monitoring module at the first terminal of each first controllable switching device, the battery capacity of the battery pack electrically connected to each first controllable switching device is determined.

[0177] When the AC power distribution module is turned on, the first controllable switching device corresponding to a battery capacity greater than or equal to the first battery capacity threshold is turned off.

[0178] In some embodiments, the processing module 202 is specifically used for:

[0179] When the AC power distribution module is turned off, the first controllable switching device corresponding to the battery capacity greater than the second battery capacity threshold is turned on.

[0180] When the battery capacity drops to the second battery capacity threshold, the first controllable switching device is turned off.

[0181] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0182] It should be further noted that although the steps in the flowchart are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowchart may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0183] It should be understood that the above-described device embodiments are merely illustrative, and the device of this application can also be implemented in other ways. For example, the division of units / modules in the above embodiments is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple units, modules, or components may be combined, or integrated into another system, or some features may be ignored or not executed.

[0184] Furthermore, unless otherwise specified, the functional units / modules in the various embodiments of this application can be integrated into one unit / module, or each unit / module can exist physically separately, or two or more units / modules can be integrated together. The integrated units / modules described above can be implemented in hardware or as software program modules.

[0185] When the integrated unit / module is implemented in hardware, the hardware can be digital circuits, analog circuits, etc. The physical implementation of the hardware structure includes, but is not limited to, transistors, memristors, etc. Unless otherwise specified, the processor can be any suitable hardware processor, such as a CPU, GPU, FPGA, DSP, and ASIC, etc. Unless otherwise specified, the storage unit can be any suitable magnetic or magneto-optical storage medium, such as resistive random access memory (RRAM), dynamic random access memory (DRAM), static random access memory (SRAM), enhanced dynamic random access memory (EDRAM), high-bandwidth memory (HBM), hybrid memory cube (HMC), etc. In some embodiments, the circuit structure of the main controller implementing the above embodiments can be as follows: Figure 6 As shown, the main controller 300 includes a memory 301 and a processor 302, which are connected via a bus.

[0186] If the integrated unit / module is implemented as a software program module and sold or used as an independent product, it can be stored in a computer-readable storage device (CMD). Based on this understanding, the technical solution of this application, 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 memory and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned memory includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0187] In the above embodiments, the descriptions of each embodiment have their own emphasis. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered within the scope of this specification.

[0188] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0189] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A control method of a power supply system, characterized by, The method is applied to a master controller, the master controller is in communication connection with at least one power cabinet, and the power cabinet comprises an AC power distribution module, a conversion module, a DC power distribution module, a battery module and a monitoring module; an input end of the AC power distribution module is electrically connected with an AC power source, an output end of the AC power distribution module is electrically connected with an input end of the conversion module, an output end of the conversion module is electrically connected with an input end of the DC power distribution module, and an output end of the conversion module is electrically connected with the battery module and a load device; the monitoring module is electrically connected with the AC power distribution module and the DC power distribution module; the method comprises: obtaining operating parameters of each power distribution module from the monitoring module; the operating parameters comprise at least one of operating current and operating voltage; when the operating parameters meet an abnormal operating condition, adjusting power distribution of at least one target power distribution module corresponding to the abnormal operating condition; the target power distribution module comprises at least one of the AC power distribution module and the DC power distribution module.

2. The method of claim 1, wherein, the conversion module comprises at least one rectifier circuit, the AC power distribution module comprises at least one group of AC contactors, the at least one group of AC contactors correspond to the at least one rectifier circuit, and the AC contactors are connected in series between the AC power source and the corresponding rectifier circuit; the operating parameters comprise three-phase AC voltages input to each group of AC contactors; when the operating parameters meet an abnormal operating condition, adjusting power distribution of at least one target power distribution module corresponding to the abnormal operating condition comprises: turning off the AC contactors corresponding to the three-phase AC voltages that do not meet preset power supply conditions, so as to adjust the capacity of the power cabinet connected to the AC power.

3. The method of claim 2, wherein, turning off the AC contactors corresponding to the three-phase AC voltages that do not meet preset power supply conditions comprises: turning off the AC contactors corresponding to the three-phase AC voltages that are missing; turning off the AC contactors corresponding to the three-phase AC voltages whose voltage amplitudes are not within a preset voltage range.

4. The method according to any one of claims 1 to 3, characterized in that, the DC power distribution module comprises at least one first controllable switching device and at least one second controllable switching device; the battery module comprises at least one battery pack; each first controllable switching device corresponds to at least one battery pack; a first end of the first controllable switching device is electrically connected with an output end of the conversion module, and a second end thereof is electrically connected with the corresponding battery pack; each second controllable switching device corresponds to at least one load device; a first end of the second controllable switching device is electrically connected with the output end of the conversion module, and a second end thereof is electrically connected with the corresponding load device; the operating parameters comprise operating parameters of the first end of each controllable switching device and operating parameters of the output end of the conversion module; when the operating parameters meet an abnormal operating condition, adjusting power distribution of at least one target power distribution module corresponding to the abnormal operating condition comprises: when the operating parameters meet the abnormal operating condition, modifying a state of the controllable switching device corresponding to the abnormal operating condition; the state of the controllable switching device comprises a conducting state or an off state.

5. The method of claim 4, wherein, modifying a state of a controllable switching device corresponding to the abnormal operation condition when the operation parameter meets the abnormal operation condition, comprising: determining, based on the first operation current and the first operation voltage sampled by the monitoring module at the first end of each controllable switching device, an operation power of a device electrically connected to the controllable switching device; wherein the device comprises a load or a battery pack; determining, based on the second operation current and the second operation voltage sampled by the monitoring module at the output end of the conversion module, a total power output by the conversion module; when the sum of the operation power of the device electrically connected to the controllable switching device and the total power output by the conversion module is greater than a preset threshold, sequentially turning off the controllable switching device of the device with the maximum absolute value of the operation power until the sum of the operation power of the device electrically connected to the controllable switching device and the total power output by the conversion module is less than or equal to the preset threshold.

6. The method of claim 4, wherein, modifying a state of a controllable switching device corresponding to the abnormal operation condition when the operation parameter meets the abnormal operation condition, comprising: determining, based on the first operation current and the first operation voltage sampled by the monitoring module at the first end of each first controllable switching device, a battery capacity of a battery pack electrically connected to each first controllable switching device; when the AC power distribution module is turned on, turning off the first controllable switching device corresponding to the battery capacity greater than or equal to the first battery capacity threshold.

7. The method of claim 6, wherein, After determining the battery capacity of the battery pack electrically connected to each first controllable switching device, the method further comprises: when the AC power distribution module is turned off, turning on the first controllable switching device corresponding to the battery capacity greater than the second battery capacity threshold; when the battery capacity decreases to the second battery capacity threshold, turning off the first controllable switching device.

8. A power supply system characterized by comprising: comprising a master controller and at least one power supply cabinet in communication connection with the master controller, the power supply cabinet comprising an AC power distribution module, a conversion module, a DC power distribution module, a battery module, a monitoring module; the input end of the AC power distribution module is electrically connected with an AC power source, the output end of the AC power distribution module is electrically connected with the input end of the conversion module, the output end of the conversion module is electrically connected with the input end of the DC power distribution module, and the output end of the conversion module is electrically connected with the battery module and a load device; the monitoring module is electrically connected with the AC power distribution module and the DC power distribution module; the master controller executes the control method according to any one of claims 1-7.

9. The power supply system of claim 8, wherein, the power supply cabinet is provided with an air conditioner, and the AC power distribution module is used for supplying power to the air conditioner; the monitoring module is used for sampling the ambient temperature of the power supply cabinet; the master controller is used for adjusting the temperature to be adjusted of the air conditioner based on the ambient temperature of the power supply cabinet.

10. A control device of a power supply system, characterized by comprising: comprising: an acquisition module, configured to obtain operation parameters of each power distribution module from a monitoring module; the operation parameters comprise at least one of an operation current and an operation voltage; the power distribution module is an AC power distribution module or a DC power distribution module in the power supply system; a processing module, configured to adjust a power distribution situation of at least one target power distribution module corresponding to an abnormal operation condition when the operation parameter meets the abnormal operation condition; The target power distribution module includes at least one of the AC power distribution module and the DC power distribution module.

11. A master controller, comprising: Comprise: A processor, a memory, a communication interface; The memory is used to store executable instructions of the processor; Wherein, the processor is configured to execute the method of any one of claims 1-7 by executing the executable instructions.

Images