Restart control system and method of refrigeration system

Abstract

The invention provides a restart control system and method for a refrigerating system. The restart control system comprises a first controller, a first power supply unit, a first switching cabinet, a second switching cabinet, a second power supply unit and a third power supply unit. The first power supply unit comprises a first change-over switch, a first power supply module and a second power supply module, the second power supply unit and the third power supply unit each comprise a second change-over switch, a first switch, a first power supply module and a third power supply module, and the first change-over switch detects that power supply of the first power supply module of the first power supply unit is abnormal; when the second change-over switch detects that the first power supply module is abnormal in power supply, the second change-over switch detects that the first power supply module is normal in power supply, the third power supply unit is switched, the second change-over switch detects that the first power supply module or the third power supply module is normal in power supply, the control switch is switched to the second power supply unit, and the first controller detects that the water chilling unit is in the power supply state again; and controlling the water chilling unit to restart. According to the scheme, self-starting after power failure can be automatically realized, so that the self-starting time is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of power-off restart of a data center refrigeration system, and in particular to a restart control system and method for a refrigeration system. Background Art

[0002] In order to ensure the security of important data, the cooling environment of the computer room where the IT cabinets and servers are located must be guaranteed to prevent the ambient temperature in the computer room from being too high, causing the IT cabinets, servers and other heat-generating equipment to fail to work properly or shut down, causing accidents. Therefore, the T3 and T4 level certifications have strict requirements on the above aspects, that is, the refrigeration system must not be shut down for a long time, and the chiller and cooling tower water replenishment device are important equipment in the refrigeration system, providing the cooling source and constant pressure water replenishment for the refrigeration system respectively. At present, during the testing and debugging process, the restart function after power failure requires manual intervention, resulting in a slow restart of the refrigeration system, and there is a defect that cannot meet the Uptime T3 and T4 level certification standards. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a restart control system and method for a refrigeration system, so as to automatically realize self-start after power failure, thereby speeding up the self-start time.

[0004] The present invention provides a restart control system for a refrigeration system, the refrigeration system includes a chiller; the restart control system includes: a first controller, a first power supply unit, a first switching cabinet, a second switching cabinet, a second power supply unit and a third power supply unit; wherein the first switching cabinet includes a switching cabinet body and a switch, and the switch is arranged in the switching cabinet body;

[0005] The first controller is connected to the chiller and the first power supply unit respectively, and the switch is connected to the chiller; wherein the first power supply unit includes a first switching switch, a first power supply module and a second power supply module, the second power supply unit and the third power supply unit each include a second switching switch, a first switch, a first power supply module and a third power supply module, the first switching switch is connected to the corresponding first power supply module, each second switching switch is connected to the corresponding first power supply module through the corresponding first switch, the switching cabinet body is connected to the second power supply unit and the third power supply unit, and the second switching cabinet is connected to each second switching switch and each first switch; the initial state of the first switch is a closed state;

[0006] The first switching switch is used to cut off the connection with the first power supply module and switch to the second power supply module when it is detected that the first controller is shut down due to power supply abnormality of the first power supply module, so as to supply power to the first controller through the second power supply module and restart the first controller;

[0007] The second switching switch of the second power supply unit is used to send a first control signal to the second switching cabinet when it is detected that the first power supply module of the second power supply unit has a power supply anomaly causing the chiller to shut down;

[0008] The second switching switch of the third power supply unit is used to send a second control signal to the second switching cabinet when it is detected that the first power supply module of the third power supply unit has a power supply anomaly causing the chiller to shut down;

[0009] The second switching cabinet is used for sending a first command signal to each first switch and each second switching switch when receiving the first control signal and the second control signal, so as to control each first switch to open and each second switching switch to switch to the corresponding third power supply module, thereby supplying power to the chiller through the corresponding third power supply module;

[0010] The second switching switch of the second power supply unit is also used to send a third control signal to the switch when it is detected that the first power supply module or the third power supply module of the second power supply unit is supplying power normally, so as to control the switch to switch to the second power supply unit through the switching cabinet body;

[0011] The second switching switch of the second power supply unit is also used to send a fourth control signal to the switch to control the switch to switch to the third power supply unit through the switching cabinet body when detecting that the first power supply module or the third power supply module of the second power supply unit has power supply abnormality;

[0012] The first controller is used to control the chiller to restart when it is detected that the chiller is in a power supply state again.

[0013] Furthermore, the control system further includes: a bus tie circuit breaker, which is arranged between the first power supply module of the second power supply unit and the first power supply module of the third power supply unit, and is also connected to the second switching cabinet; wherein the initial state of the bus tie circuit breaker is an open state;

[0014] The second switching cabinet is also used to send a second command signal to the bus tie circuit breaker when receiving the first control signal or the second control signal, so as to control the closing of the bus tie circuit breaker, and then continue to supply power to the chiller through the first power supply module of the third power supply unit or the first power supply module of the second power supply unit;

[0015] The second switch of the second power supply unit is also used to send a fifth control signal to the second switching cabinet when it is detected that the first power supply module of the third power supply unit also supplies power abnormally;

[0016] The second switch of the third power supply unit is also used to send a sixth control signal to the second switching cabinet when detecting that the first power supply module of the second power supply unit has power supply abnormality;

[0017] The second switching cabinet is also used to send a first command signal to the bus tie circuit breaker, each first switch and each second switching switch when receiving the fifth control signal or the sixth control signal, so as to control each first switch and the bus tie circuit breaker to open, and each second switching switch to switch to the corresponding third power supply module, thereby supplying power to the chiller through the corresponding third power supply module;

[0018] The second switching switch of the second power supply unit is also used to send a third control signal to the switch to control the switch to switch to the second power supply unit through the switching cabinet body when it is detected that the first power supply module of the second power supply unit or the third power supply module of the second power supply unit or the first power supply module of the third power supply unit is supplying power normally;

[0019] The second switching switch of the second power supply unit is also used to send a fourth control signal to the switch to control the switch to switch to the third power supply unit through the switching cabinet body when it is detected that the first power supply module of the second power supply unit, the third power supply module of the second power supply unit and the first power supply module of the third power supply unit are all supplying power abnormally.

[0020] Furthermore, the control system further comprises: a reactor starting cabinet, a reactor is arranged in the reactor starting cabinet, and the chiller is connected to the switch via the reactor;

[0021] The reactor is used to adjust the starting current of the chiller.

[0022] Furthermore, a comprehensive protector is also provided in the reactor starting cabinet, and the reactor is connected to the switch through the comprehensive protector;

[0023] The second switch of the second power supply unit is also used to send a seventh control signal to the integrated protector when the first power supply module of the second power supply unit is detected to be abnormal;

[0024] The second switch of the third power supply unit is also used to send an eighth control signal to the integrated protector when the first power supply module of the third power supply unit is detected to be abnormal;

[0025] The integrated protector is used to maintain the connection between the reactor and the switch within a preset time interval when receiving the seventh control signal or the eighth control signal; wherein the preset time interval is calculated based on the time required for the first power supply module to switch to the third power supply module.

[0026] Furthermore, the refrigeration system also includes a cooling tower and a water supply device, wherein the cooling tower is connected to the chiller and the water supply device respectively; the water supply device includes: a water supply pump, and a frequency conversion control cabinet connected to the water supply pump; the restart control system also includes: a dual power supply cabinet and two power distribution devices, wherein the dual power supply cabinet is connected to the frequency conversion controller and each power distribution device, and each power distribution device is connected to each second switching switch in a one-to-one correspondence; wherein each power distribution device includes a power distribution cabinet and a transformer connected in sequence; wherein each transformer is connected to the corresponding second switching switch, and each power distribution cabinet is connected to the dual power supply cabinet;

[0027] The second switching switch of the second power supply unit is used to send a first control signal to the second switching cabinet when it is detected that the first power supply module of the second power supply unit has a power supply abnormality that causes the water supply pump to stop;

[0028] The second switching switch of the third power supply unit is used to send a second control signal to the second switching cabinet when it is detected that the first power supply module of the third power supply unit has a power supply abnormality that causes the water supply pump to stop;

[0029] The second switching cabinet is used for sending a first command signal to each first switch and each second switching switch when receiving the first control signal and the second control signal, so as to control each first switch to open and each second switching switch to switch to the corresponding third power supply module, thereby supplying power to the water supply pump through the corresponding third power supply module;

[0030] The second switching switch of the second power supply unit is also used to send a third control signal to the dual power supply cabinet to control the dual power supply cabinet to switch to the distribution cabinet corresponding to the second power supply unit when it is detected that the first power supply module or the third power supply module of the second power supply unit is supplying power normally;

[0031] The second switching switch of the second power supply unit is also used to send a fourth control signal to the dual power supply cabinet to control the dual power supply cabinet to switch to the distribution cabinet corresponding to the third power supply unit when detecting that the first power supply module or the third power supply module of the second power supply unit has power supply abnormality;

[0032] Each transformer is used to convert the high voltage output by the corresponding first power supply module or the third power supply module into a low voltage;

[0033] Each power distribution cabinet is used to transmit the low voltage output by the corresponding transformer to the frequency conversion control cabinet through the dual power supply cabinet, so that the frequency conversion control cabinet controls the water supply pump to restart.

[0034] Furthermore, the second switching cabinet is also used to send a second command signal to the bus tie circuit breaker when receiving the first control signal or the second control signal, so as to control the closing of the bus tie circuit breaker, and then continue to supply power to the water supply pump through the first power supply module of the third power supply unit or the first power supply module of the second power supply unit;

[0035] The second switch of the second power supply unit is also used to send a fifth control signal to the second switching cabinet when it is detected that the first power supply module of the third power supply unit also supplies power abnormally;

[0036] The second switch of the third power supply unit is also used to send a sixth control signal to the second switching cabinet when detecting that the first power supply module of the second power supply unit has power supply abnormality;

[0037] The second switching cabinet is also used for sending a first command signal to the bus tie circuit breaker, each first switch and each second switching switch when receiving the fifth control signal or the sixth control signal, so as to control each first switch and the bus tie circuit breaker to open, and each second switching switch to switch to the corresponding third power supply module, so as to supply power to the water supply pump through the corresponding third power supply module;

[0038] The second switching switch of the second power supply unit is also used to send a third control signal to the dual power supply cabinet to control the dual power supply cabinet to switch to the distribution cabinet corresponding to the second power supply unit when it is detected that the first power supply module of the second power supply unit or the third power supply module of the second power supply unit or the first power supply module of the third power supply unit is supplying power normally;

[0039] The second switching switch of the second power supply unit is also used to send a fourth control signal to the dual power supply cabinet to control the dual power supply cabinet to switch to the distribution cabinet corresponding to the third power supply unit when it is detected that the first power supply module of the second power supply unit, the third power supply module of the second power supply unit and the first power supply module of the third power supply unit are all supplying power abnormally.

[0040] Furthermore, there are two water replenishment devices and two dual power supply cabinets, the water replenishment devices are connected to the dual power supply cabinets one by one, and each dual power supply cabinet is connected to each power distribution cabinet; the restart control system also includes a time relay arranged in the frequency conversion control cabinet of any one of the water replenishment devices;

[0041] Each power distribution cabinet is used to transmit the low voltage output by the corresponding transformer to the two dual power cabinets, so as to transmit it to the frequency conversion control cabinet of the corresponding water replenishment device through the two dual power cabinets;

[0042] If a time relay is provided in the frequency conversion control cabinet, the time relay is used to start timing when the frequency conversion control cabinet receives a low voltage, and send the timing time to the frequency conversion control cabinet;

[0043] The frequency conversion control cabinet is used to receive the timing time in real time. When the timing time reaches the preset value, the corresponding water supply pump is controlled to restart;

[0044] If the time relay is not set in the frequency conversion control cabinet, when the frequency conversion control cabinet receives low voltage, it directly controls the corresponding water supply pump to restart.

[0045] Furthermore, the frequency conversion acceleration time of each frequency conversion control cabinet is set to a preset duration; and each frequency conversion control cabinet is used to restart the water supply pump when the frequency conversion acceleration time reaches the preset duration.

[0046] The present invention provides a restart control method for a refrigeration system, the method comprising:

[0047] When the first switching switch detects that the first power supply module is abnormal in power supply and causes the first controller to shut down, the first switching switch cuts off the connection with the first power supply module and switches to the second power supply module to supply power to the first controller through the second power supply module, so that the first controller is restarted;

[0048] The second switching switch of the second power supply unit sends a first control signal to the second switching cabinet when detecting that the first power supply module of the second power supply unit has a power supply anomaly causing the chiller to shut down;

[0049] The second switching switch of the third power supply unit sends a second control signal to the second switching cabinet when detecting that the first power supply module of the third power supply unit has a power supply anomaly causing the chiller to shut down;

[0050] When receiving the first control signal and the second control signal, the second switching cabinet sends a first command signal to each first switch and each second switching switch to control each first switch to open and each second switching switch to switch to the corresponding third power supply module, thereby supplying power to the chiller through the corresponding third power supply module;

[0051] When the second switching switch of the second power supply unit detects that the first power supply module or the third power supply module of the second power supply unit is supplying power normally, the third control signal is sent to the switch to control the switch to switch to the second power supply unit through the switching cabinet body;

[0052] When the second switching switch of the second power supply unit detects that the first power supply module or the third power supply module of the second power supply unit has a power supply abnormality, the fourth control signal is sent to the switch to control the switch to switch to the third power supply unit through the switching cabinet body;

[0053] The first controller is used to control the chiller to restart when it is detected that the chiller is in a power supply state again.

[0054] An electronic device provided by the present invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the steps of any one of the above methods when executing the computer program.

[0055] The restart control system and method of the refrigeration system provided by the present invention include a first controller, a first power supply unit, a first switching cabinet, a second switching cabinet, a second power supply unit and a third power supply unit; the first power supply unit includes a first switching switch, a first power supply module and a second power supply module, and the second power supply unit and the third power supply unit both include a second switching switch, a first switch, a first power supply module and a third power supply module. The first switching switch detects that the first power supply module of the first power supply unit has an abnormal power supply, and switches to the second power supply module. The second switching switch detects that the first power supply module has an abnormal power supply, and switches to the third power supply unit. The second switching switch detects that the first power supply module or the third power supply module has a normal power supply, and controls the switch to switch to the second power supply unit. The first controller detects that the chiller is in a power supply state again, and controls the chiller to restart. This solution can automatically realize self-start after power failure, thereby speeding up the self-start time. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0057] Figure 1 A schematic diagram of the structure of a restart control system of a refrigeration system provided by an embodiment of the present invention;

[0058] Figure 2 A schematic diagram of the structure of another restart control system of a refrigeration system provided by an embodiment of the present invention;

[0059] Figure 3 A schematic structural diagram of another restart control system for a refrigeration system provided by an embodiment of the present invention;

[0060] Figure 4 A schematic structural diagram of another restart control system for a refrigeration system provided by an embodiment of the present invention;

[0061] Figure 5 A schematic diagram of the structure of a restart control system for a chiller provided by an embodiment of the present invention;

[0062] Figure 6 A schematic structural diagram of another restart control system for a refrigeration system provided by an embodiment of the present invention;

[0063] Figure 7 A schematic structural diagram of another restart control system for a refrigeration system provided by an embodiment of the present invention;

[0064] Figure 8A flowchart of a restart control method for a refrigeration system provided by an embodiment of the present invention;

[0065] Fig. 9 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0066] In recent years, data centers have been widely used in government, schools, industry, transportation, shopping malls, banks, public security, smart offices, smart life and other fields. They are one of the important means of modern management and monitoring, greatly improving storage, management efficiency and automation level.

[0067] Founded in 1993, Uptime Institute is a globally recognized data center standards organization and third-party certification body. The following two standards are important standards for certifying the availability, reliability, and operation and maintenance management service capabilities of data center infrastructure: "Data Center Site Infrastructure Tier Standard: Topology" and "Data Center Site Infrastructure Tier Standard: Operational Sustainability"

[0068] With the development of data center business around the world, higher and higher requirements are put forward for reliability. Obtaining high reliability level certification will bring more opportunities to data center owners. Uptime Tier level certification is based on the above two standards and is the most well-known and authoritative certification in the industry. It has been highly recognized worldwide.

[0069] IDC data center room rating is an industry standard created by Uptime Institute to evaluate the construction methods of data center infrastructure. The rating classification system provides a consistent evaluation method for the data center industry to evaluate various data center facilities based on the expected room infrastructure performance or uptime.

[0070] The data center room has room facilities, network communications, storage equipment, room power supply, cooling system, backup resources and other facilities. The higher the level of the data center, the higher the performance. Data centers are divided into 4 levels, namely T1 (also known as Tier 1), T2 (also known as Tier 2), T3 (also known as Tier 3) and T4 (also known as Tier 4). The data center levels are T4>T3>T2>T1.

[0071] The first level (T1) corresponds to the infrastructure data center room: no redundant facilities (can provide 99.67% availability, with a maximum downtime of 28.8 hours per year); the second level (T2) corresponds to the redundant capacity facility data center room: with redundant facilities (can provide 99.75% availability, with a maximum downtime of 22 hours per year); the third level (T3) corresponds to the operation and maintenance data center room: multiple paths are available, only one path is in operation, with redundant facilities, and can be maintained simultaneously (can provide 99.98% availability, with a maximum downtime of 1.6 hours per year) The fourth level (T4) corresponds to the fault-tolerant data center room: with redundant equipment and fault-tolerant capabilities (can provide 99.99% availability, with a maximum downtime of 0.8 hours per year)

[0072] For businesses that can tolerate occasional server network downtime during normal working hours or weekends, T1 and T2 data centers are usually sufficient. For businesses that require 24 / 7 uptime, such as airlines, e-commerce companies, financial companies, online gaming companies, etc., which have high requirements for network online, they usually choose T3 or T4 data centers.

[0073] At present, the most widely used computer rooms in international testing and certification are mostly T3 computer rooms, or T3+ computer rooms (T3+ level standard is higher than T3 level and lower than T4 level). Currently, T4 level computer rooms are relatively rare and require more resources, such as: for more important fields such as military.

[0074] In order to ensure the security of important data, the cooling environment of the computer room where the IT cabinets and servers are located must be guaranteed to prevent the ambient temperature in the computer room from being too high, causing the IT cabinets, servers and other heat-generating equipment to fail to work properly or shut down, causing accidents. Therefore, in the T3 and T4 level certification, strict requirements are placed on the above aspects, that is, the refrigeration system must not be shut down, and the chiller and cooling tower water replenishment device are important equipment in the refrigeration system, providing cold source and constant pressure water replenishment for the refrigeration system respectively. During the testing and debugging process, manual intervention is currently required to control the weak current automatic control system to provide a self-start signal after power failure to achieve self-start after power failure, resulting in a slow self-start time and a long-term shutdown of the refrigeration system. There is a defect that the Uptime T3 and T4 level certification standards cannot be achieved.

[0075] Based on this, an embodiment of the present invention provides a restart control system and method for a refrigeration system, which can be applied to automatic control applications for rapid restart of a refrigeration system.

[0076] To facilitate understanding of this embodiment, a restart control system of a refrigeration system disclosed in an embodiment of the present invention is first introduced in detail.

[0077] The present invention provides a restart control system for a refrigeration system, the refrigeration system includes a chiller, such as Figure 1 As shown, the restart control system includes: a first controller 11, a first power supply unit 12, a first switching cabinet 13, a second switching cabinet 14, a second power supply unit 15 and a third power supply unit 16; wherein the first switching cabinet 13 includes a switching cabinet body 131 and a switch 132, and the switch 132 is arranged in the switching cabinet body 131.

[0078] The first controller 11 is connected to the chiller and the first power supply unit 12 respectively, and the switch 132 is connected to the chiller; wherein the first power supply unit 12 includes a first switching switch 121, a first power supply module 122 and a second power supply module 123, the second power supply unit 15 and the third power supply unit 16 each include a second switching switch 151, a first switch 152, a first power supply module 122 and a third power supply module 153, the first switching switch 121 is connected to the corresponding first power supply module 122, each second switching switch 151 is connected to the corresponding first power supply module 122 through the corresponding first switch 152, the switching cabinet body 131 is connected to the second power supply unit 15 and the third power supply unit 16, and the second switching cabinet 14 is connected to each second switching switch 151 and each first switch 152 (it should be noted that there are many connection relationships reflected by lines in the figure, so in order to avoid the lines being messy and causing inconvenience in viewing, the connection relationship between the second switching cabinet and each second switching switch and each first switch is not specifically shown in the figure); the initial state of the first switch 152 is the closed state.

[0079] The first switching switch 121 is used to cut off the connection with the first power supply module 122 and switch to the second power supply module 123 when it is detected that the first controller 11 is shut down due to power supply anomaly of the first power supply module 122, so as to power the first controller 11 through the second power supply module 123, so as to restart the first controller 11; the second switching switch 151 of the second power supply unit 15 is used to send a first control signal to the second switching cabinet 14 when it is detected that the first power supply module 122 of the second power supply unit 15 is shut down due to power supply anomaly, so as to send a second control signal to the second switching cabinet 14 when it is detected that the first power supply module 122 of the third power supply unit 16 is shut down due to power supply anomaly, so as to send a second control signal to the second switching cabinet 14; the second switching cabinet 14 is used to send a first command signal to each first switch 152 and each second switching switch 151 when receiving the first control signal and the second control signal, so as to control each first switch 152 to open and each second switching switch 151 to switch to the corresponding third power supply module 153, so as to power the chiller through the corresponding third power supply module 153;

[0080] The second switching switch 151 of the second power supply unit 15 is also used to send a third control signal to the switch 132 to control the switch 132 to switch to the second power supply unit 15 through the switching cabinet body 131 when it is detected that the first power supply module 122 or the third power supply module 153 of the second power supply unit 15 is supplying power normally; the second switching switch 151 of the second power supply unit 15 is also used to send a fourth control signal to the switch 132 to control the switch 132 to switch to the third power supply unit 16 through the switching cabinet body 131 when it is detected that the first power supply module 122 or the third power supply module 153 of the second power supply unit 15 is supplying power abnormally; the first controller 11 is used to control the chiller to restart when it is detected that the chiller is in a power supply state again.

[0081] The above-mentioned chillers are generally used in large air conditioning systems, such as the York MaxE YK chiller, which includes a compressor (with an integral speed-increasing gear), an open motor, a condenser, an evaporator and a variable throttling orifice plate.

[0082] The first controller may be arranged on the chiller and connected to the compressor.

[0083] The first controller (also called the control center) has a color liquid crystal display (LCD) and touch buttons on each interface, which can display a series of technical information and color pictures of corresponding components. For example, the location of each parameter of the chiller can be clearly marked on the display, as well as instructions for specific operations, making the information clearer and easier to operate the unit. The pictures shown on the LCD screen show the status of the chiller, subsystems and system parameters, and can display multiple operating parameters on the same screen at the same time. In addition, the operator can also observe the historical and current operating conditions of the chiller through the graphical interface. Chillers with OptiView control center can be equipped with electromechanical starters, York solid-state starters (optional), or variable frequency starters (optional). The control center is compatible with York solid-state starters (optional), York variable speed drives (VSD) (optional) and York electromechanical (EM) starters.

[0084] The control center is disconnected through a 1.5 or 2KVA transformer in the compressor motor starter to provide a separate overcurrent protection power supply for all controllers. Several terminal strips are provided for the following wiring, such as: remote start and stop, flow switch, chilled water pump, local and remote start and stop devices. The control center also provides field interlocks to indicate the status of the chiller. These contacts include: remote control mode ready to start, normal shutdown, emergency shutdown and chiller operation contacts. The pressure sensor measures the pressure of the system, and its output is a DC voltage corresponding to the pressure input; the thermistor measures the temperature of the system, and its output is a DC voltage corresponding to the measured temperature.

[0085] The control center continuously monitors the running system, displays and records the reasons for any shutdown (emergency or normal shutdown). The display screen shows the status of the chiller and its main components with pictures, and gives all operating information and system parameters in detail.

[0086] In the specific implementation process, the operation of the chiller is controlled by the most advanced microcomputer control center (also known as the first controller mentioned above), which can be programmed by the operator to meet the requirements of different projects. Automatic start and stop can also be programmed. The control center on the chiller is installed, wired and tested by the factory of the chiller, providing monitoring, data recording, safety protection and convenient operation for the chiller; the control center continuously monitors the running system, displays and records the reasons for any shutdown (emergency or normal shutdown), and the display screen shows the status of the chiller and its main components with pictures, and gives all the operating information and system parameters in detail, such as the operating status, temperature, pressure and other information of the chiller can be read from the display screen.

[0087] The first power supply unit may include a first switch, a first power supply module and a second power supply module; wherein the first controller is connected to the first switch.

[0088] The above-mentioned first power supply module can be understood as AC power (generally 380V, that is, voltage power), and the above-mentioned second power supply module can be understood as an uninterruptible power supply (UPS); the above-mentioned first switching switch can be understood as an ATS dual power switch. When the AC power is normal, the AC power supply is given priority, that is, when the AC power is normal, the ATS dual power switch connects the power supply to the AC power, so that the AC power supplies the first controller.

[0089] During the specific implementation process, when the first switching switch detects that the AC power in the first power supply unit fails or loses power, the power supply can be automatically switched to the UPS, so that the UPS supplies power to the first controller, thereby ensuring uninterrupted power supply to the first controller.

[0090] Specifically, the ATS dual power switch is generally composed of a sub-controller and a switch body. The sub-controller is connected to the incoming line terminal of the switch body. In actual implementation, the sub-controller can be used to detect the working condition of the above-mentioned first power supply module. When the monitored first power supply module fails (such as undervoltage, loss of pressure or power failure), the sub-controller issues an action command, and the switch body automatically switches from the first power supply module to the second power supply module with the first controller.

[0091] During the specific implementation process, when the AC power in the first power supply unit fails or is cut off (that is, when the first power supply module is supplying power abnormally), the first controller will be powered off and shut down. At this time, in order to restart the first controller as soon as possible, thereby quickly controlling the restart of the chiller, the first switching switch can cut off the connection with the first power supply module and switch to the second power supply module to power the first controller through the second power supply module, so that the first controller can be restarted.

[0092] It should be noted that the switching time of the above-mentioned first switch during automatic switching is very short and can be ignored, so it can ensure that the power of the first controller is quickly re-supplied and the first controller is quickly restarted.

[0093] The first switching cabinet and the second switching cabinet mentioned above can both adopt 10KV automatic switching cabinets, which are generally composed of a switching cabinet body, a controller and a switch body, wherein the controller and the switch body are connected, and the controller and the switch body are arranged in the switching cabinet body.

[0094] The above-mentioned second power supply unit and the third power supply unit can both include a second switching switch, a first switch, a first power supply module and a third power supply module; wherein the above-mentioned second power supply unit and the third power supply unit can be understood as two power supplies, and the two power supplies simultaneously supply power to the first switching cabinet.

[0095] The first power supply module in the above-mentioned second power supply unit and the third power supply unit can be understood as AC power (generally 10KV, that is, high voltage electricity), and the above-mentioned third power supply module can be understood as a diesel generator; each of the above-mentioned second switching switches can adopt an ATS dual power switch; it should be noted that the first power supply modules in the second and third power supply units come from different 10KV AC power. In addition, the first power supply module and UPS in the first power supply unit are both low-voltage 380V electricity, which are provided after being transformed by the transformer in the distribution device.

[0096] In this embodiment, the two power supplies of the second power supply unit and the third power supply unit can supply power at the same time, and the second power supply unit and the third power supply unit are both connected to the first switching cabinet. When the mains power of the two power supplies is normal, the mains power of the second power supply unit can be used to power the chiller, that is, the switch in the first switching cabinet is switched to the second switching switch of the second power supply unit through the switching cabinet body, so that the mains power of the second power supply unit is used to power the chiller. Therefore, as long as it is detected that the mains power supply of the second power supply unit is normal, the switch in the first switching cabinet can be switched to the second switching switch of the second power supply unit through the switching cabinet body; and when the mains power supply of the second power supply unit is abnormal, the mains power supply of the third power supply unit may be normal, and the mains power of the third power supply unit can be used to power the chiller. That is, the switch in the first switching cabinet is switched to the second switching switch of the third power supply unit through the switching cabinet body, so that the AC power of the third power supply unit supplies power to the chiller; but if the AC power of the second power supply unit and the third power supply unit are both abnormal, after each second switching switch connects the power supply to the diesel generator (that is, the third power supply module), if the diesel generator of the second power supply unit is normally powered, you can choose to use the diesel generator of the second power supply unit to power the chiller first, and if the diesel generator of the second power supply unit is abnormal, and the diesel generator of the third power supply unit may be normal, you can try to use the diesel generator of the third power supply unit to power the chiller, that is, the switch in the first switching cabinet is switched to the second switching switch of the third power supply unit through the switching cabinet body.

[0097] In actual implementation, it is assumed that the line between the second switching switch in the second power supply unit and the third power supply module is recorded as a, the line between the second switching switch in the second power supply unit and the first power supply module in the second power supply unit is recorded as b, the line between the second switching switch in the third power supply unit and the third power supply module is recorded as c, and the line between the second switching switch in the third power supply unit and the first power supply module in the third power supply unit is recorded as d; then the reason for the abnormal AC power supply of this power supply of the second power supply unit may be the first power supply module itself in the second power supply unit, or it may be caused by damage to line b; the reason for the abnormal AC power supply of this power supply of the third power supply unit may be the first power supply module itself in the third power supply unit, or it may be caused by damage to line d; and the reason for the abnormal power supply of the third power supply module of this power supply of the second power supply unit may be caused by damage to line a; the reason for the abnormal power supply of the third power supply module of this power supply of the third power supply unit may be caused by damage to line c.

[0098] Therefore, when the first power supply module in the second power supply unit can supply power normally, the switch can be controlled to switch to the second power supply unit through the switching cabinet body; and when the second switching switch of the second power supply unit detects that the first power supply module of the second power supply unit supplies power abnormally, the switch can be controlled to switch to the third power supply unit through the switching cabinet body. After that, if the first power supply module in the third power supply unit itself has no faults and line d has not been damaged, it can be powered normally through the first power supply module in the third power supply unit. However, if it is detected that the first power supply module in the third power supply unit also supplies power abnormally (that is, the first power supply module itself has faults and / or line d is damaged), then each second switching switch It needs to be switched to the corresponding third power supply module. At this time, if it is detected that the third power supply module of the second power supply unit is supplying power normally (that is, line a is not damaged, and the third power supply module can supply power normally through line a), the switch can be controlled to switch to the second power supply unit through the switching cabinet body; but if it is detected that the third power supply module of the second power supply unit is supplying power abnormally (that is, line a is damaged, and the third power supply module cannot supply power normally through line a), the switch can be controlled to switch to the third power supply unit through the switching cabinet body. After that, if line c is not damaged, the third power supply module of the third power supply unit can supply power normally, that is, the third power supply module can supply power normally through line c. In actual implementation, the second switching cabinet and the ATS dual power switch can be connected to the DC panel (not shown in the figure) to supply DC power through the DC panel to ensure that there is power when the power is off.

[0099] In a specific implementation process, when the first controller is in a powered state and detects that the chiller is in a powered state again (power is restored), it controls the chiller to restart.

[0100] Rapid startup is a basic requirement for data center and process cooling applications. The goal is to re-enable cooling as quickly as possible after a power failure to protect temperature-sensitive equipment and processes. Rapid restart of the unit can avoid catastrophic consequences such as data loss, equipment damage due to overheating, and operational interruption.

[0101] The control center of the chiller is equipped with a power failure quick restart function, which can restart the chiller in a very short time once the power is restored. Specifically, the configuration of this function is that the first controller is connected to an uninterruptible power supply (UPS). The use of UPS can provide the fastest restart because the UPS can maintain the power supply of the control center of the chiller (that is, the first controller mentioned above) and the control circuit of the corresponding chiller until the backup power diesel generator starts, which can avoid the control center being in a power failure and shutdown state for a long time after the mains power is abnormal. Therefore, the quick start function can minimize the restart time of the unit. It also reduces the time required to re-reach the set chilled water supply temperature.

[0102] In the prior art, the chiller and the first controller are only equipped with one AC power supply. When the AC power fails, the operator has to wait for the maintenance personnel to repair the AC power supply and then manually press the button to control the first controller to provide a power-off self-start signal to the chiller to achieve power-off self-start. This results in a slow self-start time, and the refrigeration unit is at risk of being shut down for a long time, and cannot achieve the defects of T3 and T4 level certification standards.

[0103] Compared with the existing technology, this solution, under the requirement of Uptime level certification, equips the first controller with one power supply unit and the chiller with two power supply units, and each power supply unit is also equipped with different power supply modes (that is, each power supply unit is also equipped with a main power supply and a backup power supply, respectively). Therefore, the power supply mode of the first controller and the chiller can be automatically switched when the main power supply is abnormal, thereby ensuring uninterrupted power supply to the chiller and realizing rapid self-start of the chiller after power failure, solving the problem that the chiller cannot realize rapid self-start after power failure.

[0104] The restart control system of the refrigeration system provided in the above embodiment includes a first controller, a first power supply unit, a first switching cabinet, a second switching cabinet, a second power supply unit and a third power supply unit; the first power supply unit includes a first switching switch, a first power supply module and a second power supply module, and the second power supply unit and the third power supply unit both include a second switching switch, a first switch, a first power supply module and a third power supply module. The first switching switch detects that the first power supply module of the first power supply unit has an abnormal power supply, and switches to the second power supply module. The second switching switch detects that the first power supply module has an abnormal power supply, and switches to the third power supply unit. The second switching switch detects that the first power supply module or the third power supply module has a normal power supply, and controls the switch to switch to the second power supply unit. The first controller detects that the chiller is in a power supply state again, and controls the chiller to restart. This solution can automatically realize self-start after power failure, thereby speeding up the self-start time.

[0105] Based on the above restart control system of the refrigeration system, the embodiment of the present invention further provides another restart control system of the refrigeration system, such as Figure 2 As shown, the system also includes a busbar circuit breaker 17, which is arranged between the first power supply module 122 of the second power supply unit 15 and the first power supply module 122 of the third power supply unit 16, and is also connected to the second switching cabinet 14 (similarly, there are many connection relationships represented by lines in the figure, so in order to avoid cluttered lines and inconvenience in viewing, the connection relationship between the second switching cabinet and the busbar circuit breaker is not specifically shown in the figure); wherein, the initial state of the busbar circuit breaker 17 is the open state.

[0106] The second switching cabinet 14 is also used to send a second command signal to the bus tie circuit breaker 17 when receiving the first control signal or the second control signal, so as to control the bus tie circuit breaker 17 to close, and then continue to supply power to the chiller through the first power supply module 122 of the third power supply unit 16 or the first power supply module 122 of the second power supply unit 15; the second switching switch 151 of the second power supply unit 15 is also used to send a fifth control signal to the second switching cabinet 14 when it is detected that the first power supply module 122 of the third power supply unit 16 also supplies power abnormally; the second switching switch 151 of the third power supply unit 15 151 is also used to send a sixth control signal to the second switching cabinet 14 when detecting that the first power supply module 122 of the second power supply unit 15 has power supply anomaly; the second switching cabinet 14 is also used to send a first command signal to the bus tie circuit breaker 17, each first switch 152 and each second switching switch 151 when receiving the fifth control signal or the sixth control signal, so as to control each first switch 152 and the bus tie circuit breaker 17 to open, and each second switching switch 151 to switch to the corresponding third power supply module 153, thereby supplying power to the chiller through the corresponding third power supply module 153;

[0107] The second switching switch 151 of the second power supply unit 15 is also used to send a third control signal to the switch 132 to control the switch 132 to switch to the second power supply unit 15 through the switching cabinet body 131 when it is detected that the first power supply module 122 of the second power supply unit 15 or the third power supply module 153 of the second power supply unit 15 or the first power supply module 122 of the third power supply unit 16 is supplying power normally; the second switching switch 151 of the second power supply unit 15 is also used to send a fourth control signal to the switch 132 to control the switch 132 to switch to the third power supply unit 16 through the switching cabinet body 131 when it is detected that the first power supply module 122 of the second power supply unit 15, the third power supply module 153 of the second power supply unit 15 and the first power supply module 122 of the third power supply unit 16 are all supplying power abnormally.

[0108] Each of the above-mentioned first switches can be arranged between the corresponding second switching switch and the corresponding 10KV mains; the above-mentioned bus tie circuit breaker can be arranged between the busbars connecting the first power supply module of the second power supply unit and the first power supply module of the third power supply unit, and connected to the second switching cabinet to meet the requirements of power supply reliability. In the bus tie wiring mode, the bus tie circuit breaker is the link between the two busbars for electrical connection. In the initial case, the bus tie circuit breaker is in the open state, and the busbars are operated separately.

[0109] In this embodiment, it is still assumed that the line between the second switching switch in the second power supply unit and the third power supply module is recorded as a, the line between the second switching switch in the second power supply unit and the first power supply module in the second power supply unit is recorded as b, the line between the second switching switch in the third power supply unit and the third power supply module is recorded as c, and the line between the second switching switch in the third power supply unit and the first power supply module in the third power supply unit is recorded as d; it may also be due to damage to line b; the reason for the abnormal AC power supply of this power supply of the third power supply unit may be the first power supply module itself in the third power supply unit, or it may be due to damage to line d; and the reason for the abnormal power supply of the third power supply module of this power supply of the second power supply unit may be due to damage to line a; the reason for the abnormal power supply of the third power supply module of this power supply of the third power supply unit may be due to damage to line c.

[0110] Specifically, the reason for the power supply abnormality of the first power supply module in the second power supply unit may be the first power supply module itself, such as the failure of the upper 110KV substation (not shown in the figure) connected to the first power supply module causing the first power supply module to lose power, or it may be the reason that the line between the first power supply module and the second switching switch (that is, the above-mentioned line b) is damaged. In actual implementation, the controller of the second switching cabinet can send a second command signal to the main circuit breaker to close the main circuit breaker when the first power supply module in the second power supply unit or the third power supply unit has a power supply abnormality. When the main circuit breaker is closed, the first power supply module of the third power supply unit can be connected to the first switching cabinet through the main circuit breaker and the second switching switch of the second power supply unit, thereby supplying power to the chiller; at this time, if it is detected that the first power supply module of the third power supply unit is supplying power normally (that is, the first power supply module of the third power supply unit itself has no fault and line b has not been damaged), the switch can be controlled to switch to the second power supply unit through the switching cabinet body so that the chiller is powered again, and it can also be determined that the reason for the power supply abnormality of the first power supply module in the second power supply unit is the first power supply module itself.

[0111] In actual implementation, after the main bus circuit breaker is closed for the first time, if the second switching switch of the second power supply unit detects that the first power supply module of the third power supply unit also has power supply abnormality (it may be that line b is damaged, which causes the first power supply module of the third power supply unit to be unable to connect normally through the main bus circuit breaker and the second switching switch of the second power supply unit, or it may be the first power supply module in the third power supply unit itself), that is, the chiller cannot be powered again, then the specific reason for the power supply abnormality of the first power supply module in the second power supply unit cannot be determined. In this regard, the second switching cabinet can continue to send the first command signal to the main bus circuit breaker to open the main bus circuit breaker, and send the first command signal to each first switch to open the first switch, and also send the first command signal to each second switching switch to make each second switching switch cut off the connection with the first power supply module and switch to the corresponding third power supply module, and then supply power to the chiller through the corresponding third power supply module.

[0112] In fact, the second power supply unit and the third power supply module of the third power supply unit may also have abnormal power supply. Specifically, the reason for the abnormal power supply of the third power supply module of the second power supply unit may be that line a is damaged, and the reason for the abnormal power supply of the third power supply module of the third power supply unit may be that line c is damaged.

[0113] Therefore, in the specific implementation process, if the third power supply module in the second power supply unit supplies power normally (that is, if line a is not damaged, the third power supply module can supply power normally through line a), the switch can be controlled to switch to the second power supply unit through the switching cabinet body. However, if it is detected that the third power supply module in the second power supply unit also supplies power abnormally (that is, line a is damaged and the third power supply module cannot supply power normally through line a), the switch can be controlled to switch to the third power supply unit through the switching cabinet body. After that, if line c is not damaged, the third power supply module of the third power supply unit can supply power normally, that is, the third power supply module can supply power normally through line c.

[0114] It should be noted that the third power supply module of the third power supply unit and the third power supply module of the second power supply unit are the same, generally multiple diesel generators (for example, the third power supply module of the third power supply unit is diesel generator A to diesel generator D, and the third power supply module of the second power supply unit is also diesel generator A to diesel generator D), which are connected to the second switching switch through the bus and can support continuous power supply. Therefore, the reason for the power supply of the third power supply module in the third power supply unit and the reason for the power supply abnormality of the third power supply module in the second power supply unit are usually not the reason of the third power supply module itself.

[0115] The restart control system of the refrigeration system provided in the above embodiment can determine the cause of the power supply abnormality, and can also avoid the situation where directly switching the first switching cabinet and the second switching switch may cause the diesel generator to supply power instead of the normal mains power supply when any one of the mains power lines may be normal.

[0116] Based on the above restart control system of the refrigeration system, the embodiment of the present invention further provides another restart control system of the refrigeration system, such as Figure 3 As shown, the system further includes an inductor starter cabinet 18, in which a reactor 19 is provided, and the chiller is connected to the switch 132 via the reactor 19; the reactor 19 is used to adjust the starting current of the chiller.

[0117] In the specific implementation process, the above-mentioned chiller may be a high-pressure chiller powered by 10KV. For a high-pressure chiller powered by 10KV, the initial starting current is too large and often exceeds many times the rated current (generally 5-8 times). In order to reduce the starting current, an inductor starting cabinet can be equipped, such as the TGRK series medium and high voltage inductor soft starting cabinet. Its working principle is to connect a reactor with a smoothly changeable impedance that adapts to the motor power in series in the motor stator circuit, adjust the size of the DC current in the control winding, and automatically and steplessly reduce the impedance from large to small within a predetermined time. The motor terminal voltage gradually rises to full voltage to achieve motor step-down starting. During the starting process, the starting current is maintained below 3.5 to 5 times the rated current. After the starting is completed, the reactor is automatically cut off, and the starting process has no major impact on the power grid.

[0118] Based on the above restart control system of the refrigeration system, the embodiment of the present invention further provides another restart control system of the refrigeration system, such as Figure 4 As shown, an integrated protector 20 is also provided in the reactor starting cabinet 18, and the reactor 19 is connected to the switch 132 through the integrated protector 20; the second switching switch 151 of the second power supply unit 15 is also used to send a seventh control signal to the integrated protector 20 when an abnormality is detected in the first power supply module 122 of the second power supply unit 15; the second switching switch 151 of the third power supply unit 16 is also used to send an eighth control signal to the integrated protector 20 when an abnormality is detected in the first power supply module 122 of the third power supply unit 16; the integrated protector 20 is used to maintain the connection between the reactor 19 and the switch 132 within a preset time interval when the seventh control signal or the eighth control signal is received; wherein the preset time interval is calculated based on the time required for the first power supply module 122 to switch to the third power supply module 153.

[0119] In fact, each second switching switch is connected to the integrated protector and the switch of the first switching cabinet. In the specific implementation process, in order to quickly protect the chiller when the power supply is abnormal, a comprehensive protector can generally be set in the reactor starting cabinet, and the power protection time of the integrated protector when it is set at the factory is generally short (usually 1 to 2s), but in this embodiment, since the 10KV high-voltage reactor starting cabinet of the data center receives two power supply units (one is the second power supply unit and the other is the third power supply unit), and each power supply unit also includes two power supplies (one is the mains power supply and the other is a diesel generator), it is usually necessary to consider the switching time taken by the second switching switch to switch from the first power supply module to the third power supply module; specifically, the power protection time (equivalent to the above-mentioned preset time) can be calculated in the following way:

[0120] Power supply protection time=time required for the first power supply module to switch to the third power supply module (ie, the switching time taken for the second switch to switch from the first power supply module to the third power supply module).

[0121] It should be noted that the time for opening or closing the busbar circuit breaker is generally short, and the switching time taken for the switch of the first switching cabinet to switch from one second switching switch to another second switching switch is also short, so it can be ignored.

[0122] In actual implementation, the power protection time obtained by the above calculation is generally 60 seconds, which is much longer than the default setting time. Specifically, if the power protection time is set to be less than the power protection time obtained by the above calculation, for example, it is set to 30 seconds, then the comprehensive protector (actually equivalent to a switch) will be disconnected if it still cannot supply power normally after 30 seconds, which is equivalent to disconnecting the switch connection between the chiller and the first switching cabinet. Therefore, if normal power supply can only be continued after 30 seconds of switching time, the comprehensive protector will be in a disconnected state and cannot supply power to the chiller. In summary, the power protection time needs to be set to not less than the power protection time obtained by the above calculation.

[0123] Through the above method, it has been tested that the chiller can quickly restart itself after a power outage.

[0124] For a better understanding of the above embodiments, please refer to Figure 5A schematic diagram of a restart control system for a chiller is shown, wherein the 380V AC power is equivalent to the first power supply module in the above-mentioned first power supply unit, the 380V UPS is equivalent to the second power supply module in the above-mentioned first power supply unit, the control center is equivalent to the above-mentioned first controller, the 10KV AC power is equivalent to the first power supply module in the above-mentioned second power supply unit and the first power supply module in the third power supply unit, the 10KV AC power switch is equivalent to the first switch, the 10KV automatic switching cabinet is equivalent to the above-mentioned first switching cabinet, the standby automatic switching cabinet is equivalent to the above-mentioned second switching cabinet, and the above-mentioned multiple diesel generators are combined together and are equivalent to the third power supply module in the above-mentioned second power supply unit and the third power supply module in the third power supply unit.

[0125] In actual implementation, when any 10KV mains fails, the "standby automatic switch cabinet" will send a signal to the bus tie circuit breaker to close (equivalent to the second command signal mentioned above), and the other 10KV mains will supply power to the downstream to realize A and B routes; specifically, the bus tie can connect two 10KV mains. If any 10KV mains fails, it will close and the normal mains will supply power to form A and B routes. When both mains fail, the bus tie circuit breaker and the two 10KV mains switches will receive the command from the standby automatic switch cabinet to disconnect, and the two ATS dual power switches will automatically switch to diesel generator power supply.

[0126] Multiple mains power lines are drawn from the 110KV substation, of which two 10KV mains high-voltage power sources supply power at the same time. When one 10KV mains high-voltage power supply fails (the superior substation causes one line to lose power, and the local bus section has no fault), the bus tie circuit breaker is closed, and the other 10KV mains high-voltage power supply can ensure the power supply of the chiller. When one 10KV mains high-voltage power supply fails (the local bus section has a fault), the 10KV automatic switching cabinet switches to the ATS dual power switch corresponding to the other 10KV mains high-voltage power supply. When both 10KV mains high-voltage power supplies lose power, each ATS dual power switch switches to the diesel generator.

[0127] Based on the above restart control system of the refrigeration system, the embodiment of the present invention further provides another restart control system of the refrigeration system, such as Figure 6As shown, the refrigeration system also includes a cooling tower and a water supply device, and the cooling tower is connected to the chiller and the water supply device respectively; the water supply device includes: a water supply pump, and a frequency conversion control cabinet connected to the water supply pump; the restart control system also includes: a dual power supply cabinet 21, two power distribution devices 22, the dual power supply cabinet 21 is connected to the frequency conversion controller and each power distribution device 22, and each power distribution device 22 is connected to each second switching switch 151 in a one-to-one correspondence; wherein each power distribution device 22 includes a power distribution cabinet 221 and a transformer 222 connected in sequence; wherein each transformer 2 22 are connected to the corresponding second switching switch 151, and each power distribution cabinet 221 is connected to the dual power supply cabinet 21; the second switching switch 151 of the second power supply unit 15 is used to send a first control signal to the second switching cabinet 14 when it is detected that the first power supply module 122 of the second power supply unit 15 has a power supply anomaly causing the water supply pump to stop, and the second switching switch 151 of the third power supply unit 16 is used to send a second control signal to the second switching cabinet 14 when it is detected that the first power supply module 122 of the third power supply unit 16 has a power supply anomaly causing the water supply pump to stop, and the second switching switch 151 of the third power supply unit 16 is used to send a second control signal to the second switching cabinet 14;

[0128] The second switching cabinet 14 is used to send a first command signal to each first switch 152 and each second switching switch 151 when receiving the first control signal and the second control signal, so as to control each first switch 152 to open and each second switching switch 151 to switch to the corresponding third power supply module 153, and then power the water supply pump through the corresponding third power supply module 153; the second switching switch 151 of the second power supply unit 15 is also used to send a third control signal to the dual power supply cabinet 21 when it is detected that the first power supply module 122 or the third power supply module 153 of the second power supply unit 15 is powered normally, so as to control the dual power supply cabinet 21 to switch to the second power supply unit 1 5 corresponding to the power distribution cabinet 221; the second switching switch 151 of the second power supply unit 15 is also used to send a fourth control signal to the dual power supply cabinet 21 when it is detected that the first power supply module 122 or the third power supply module 153 of the second power supply unit 15 has a power supply abnormality, so as to control the dual power supply cabinet 21 to switch to the power distribution cabinet 221 corresponding to the third power supply unit 16; each transformer 222 is used to convert the high voltage output by the corresponding first power supply module 122 or the third power supply module 153 into a low voltage; each power distribution cabinet 221 is used to transmit the low voltage output by the corresponding transformer 222 to the frequency conversion control cabinet through the dual power supply cabinet 21, so that the frequency conversion control cabinet controls the water supply pump to restart.

[0129] In the specific implementation process, the water supply device of the cooling tower can be composed of a water supply pump, a frequency conversion control cabinet and connecting pipes. Specifically, the frequency conversion control cabinet is connected to the water supply pump, the water supply pump is connected to the cooling tower, and the cooling tower can also be connected to the chiller through a pipeline; after the frequency conversion control cabinet is powered, it can control the water supply pump to pump water from the water supply pool into the cooling tower, and the water pumped into the cooling tower can also flow in the pipeline between the cooling tower and the chiller.

[0130] In actual implementation, in order to ensure that the cooling tower is supplied with water in time, it is necessary to ensure that the water supply pump in the water supply device can be quickly powered on and restarted after power failure. For this purpose, a dual power supply cabinet and two distribution devices can be set; each distribution device includes a distribution cabinet and a transformer connected in sequence; wherein, the dual power supply cabinet may also include a power supply cabinet body and a second switch, the second switch is arranged in the power supply cabinet body, the power supply cabinet body is connected to each distribution cabinet, and the second switch is connected to the frequency conversion controller. In fact, the second switch can also be communicated with each second switching switch; each transformer is also connected to the second switching switch one by one, that is, the second switching switch in the second power supply unit is connected to the transformer in the distribution device corresponding to the second switching switch, and the second switching switch in the third power supply unit is connected to the transformer in the distribution device corresponding to the second switching switch.

[0131] Specifically, since the city power drawn from the substation is 10KV high voltage electricity, and the water replenishment device usually uses low voltage power supply, the 10KV high voltage electricity can be transformed by a transformer to obtain 380V low voltage electricity. By setting up a dual power supply cabinet, two power supplies can be received, one of which can be the city power in the second power supply unit or the low voltage electricity after the diesel generator is transformed, and the other can be the city power in the third power supply unit or the low voltage electricity after the diesel generator is transformed. Therefore, even if one power supply fails, the other power supply can provide power normally when it is normal, so that the chiller can start normally.

[0132] In the specific implementation process, two mains power supplies are preferably used for power supply. In actual implementation, the two mains power supplies may fail. If only any one mains power supply fails, the other normal mains power supply can be used for power supply. However, if both mains power supplies fail, the frequency conversion control cabinet will lose power and cause the water supply pump to stop. In this regard, the second switching cabinet can send a first command signal to each first switch and each second switching switch to open each first switch and cut off the connection with the corresponding mains power, thereby switching to the diesel generator and providing emergency power supply to the frequency conversion control cabinet, so that the frequency conversion control cabinet controls the water supply pump to restart.

[0133] Furthermore, the second switching cabinet 14 is also used to send a second command signal to the bus tie circuit breaker 17 when receiving the first control signal or the second control signal, so as to control the closing of the bus tie circuit breaker 17, and then continue to supply power to the water supply pump through the first power supply module 122 of the third power supply unit 16 or the first power supply module 122 of the second power supply unit 15; the second switching switch 151 of the second power supply unit 15 is also used to send a fifth control signal to the second switching cabinet 14 when it is detected that the first power supply module 122 of the third power supply unit 16 also has a power supply abnormality; the second switching switch 151 of the third power supply unit 16 is also used to send a sixth control signal to the second switching cabinet 14 when it is detected that the first power supply module 122 of the second power supply unit 15 has a power supply abnormality; the second switching switch 151 of the third power supply unit 16 is also used to send a first command signal to the bus tie circuit breaker 17, each first switch 152 and each second switching switch 151 when receiving the fifth control signal or the sixth control signal, so as to control each first switch 152 The main circuit breaker 17 is opened, and each second switching switch 151 is switched to the corresponding third power supply module 153, and then the water supply pump is powered by the corresponding third power supply module 153; the second switching switch 151 of the second power supply unit 15 is also used to send a third control signal to the dual power supply cabinet 21 to control the dual power supply cabinet 21 to switch to the distribution cabinet 221 corresponding to the second power supply unit 15 when it is detected that the first power supply module 122 of the second power supply unit 15 or the third power supply module 153 of the second power supply unit 15 or the first power supply module 122 of the third power supply unit 16 is powered normally; the second switching switch 151 of the second power supply unit 15 is also used to send a fourth control signal to the dual power supply cabinet 21 to control the dual power supply cabinet 21 to switch to the distribution cabinet 221 corresponding to the third power supply unit 16 when it is detected that the first power supply module 122 of the second power supply unit 15, the third power supply module 153 of the second power supply unit 15 and the first power supply module 122 of the third power supply unit 16 are all powered abnormally.

[0134] In actual implementation, if the restart control system is also provided with a main bus circuit breaker, when the second switching cabinet detects that the power supply of the first power supply module of the second power supply unit or the third power supply unit is abnormal, causing the water supply pump to stop, it can first send a second command signal to the main bus circuit breaker to control the closing of the main bus circuit breaker.

[0135] Specifically, if the power supply abnormality of one of the power supplies is caused by a line fault, and the power supply abnormality of the other power supply is caused by the mains itself, then after the main circuit breaker is closed, one power supply can continue to provide power. If voltage abnormalities of the two power supplies are still detected after the main circuit breaker is closed, a first command signal can be sent to each second switching switch, and a diesel generator can be used for power supply.

[0136] Based on the above restart control system of the refrigeration system, the embodiment of the present invention further provides another restart control system of the refrigeration system, such as Figure 7 As shown, there are two water replenishment devices and two dual power cabinets 21, and the water replenishment devices are connected to the dual power cabinets 21 one by one, and each dual power cabinet 21 is connected to each distribution cabinet 221 ( Figure 7 There are two dual power cabinets and two distribution cabinets, one of which is connected to both distribution cabinets, and the other is also connected to both distribution cabinets); the restart control system also includes a time relay 23 arranged in the frequency conversion control cabinet of any one of the water replenishment devices.

[0137] Each power distribution cabinet 221 is used to transmit the low voltage output by the corresponding transformer 222 to the two dual power supply cabinets 21, so as to transmit it to the frequency conversion control cabinet of the corresponding water supply device through the two dual power supply cabinets 21; if a time relay 23 is provided in the frequency conversion control cabinet, the time relay 23 is used to start timing when the frequency conversion control cabinet receives the low voltage, and send the timing time to the frequency conversion control cabinet; the frequency conversion control cabinet is used to receive the timing time in real time, and when the timing time reaches the preset value, the corresponding water supply pump is controlled to restart; if the time relay 23 is not provided in the frequency conversion control cabinet, when the frequency conversion control cabinet receives the low voltage, it directly controls the corresponding water supply pump to restart.

[0138] In the specific implementation process, in order to further ensure that the cooling tower is supplied with water in a timely manner, two water supply devices and two dual power supply cabinets can be set up. The water supply devices are connected to the dual power supply cabinets one by one, and each dual power supply cabinet is also connected to each distribution cabinet. Through such a setting, the two water supply devices can serve as backup for each other. When the cold water pump in one of the water supply devices stops working, the cold water pump in the other water supply device may start normally, thereby ensuring that the cooling tower is supplied with water in a timely manner.

[0139] During the Uptime level certification test, if both mains power lines fail, the system can automatically switch to diesel generator power supply. However, since there is no time difference between the two water supply devices when they restart automatically after a power outage, after the two backup water supply pumps are connected with a connecting line, the frequency conversion control cabinet will usually flash frequently, causing the two water supply pumps to be unable to restart automatically after a power outage.

[0140] In this regard, a time relay can be installed in the frequency conversion control cabinet of any set of cooling tower water supply device, and then the corresponding water supply pump of the frequency conversion control cabinet can be adjusted to have a 20-second (equivalent to the above preset value) delay time after power failure. Since one of the water supply devices is equipped with a time relay, there is a time difference between the two water supply devices when they are powered off at the same time. When the frequency conversion control cabinet controls the water supply pump to start automatically after power failure, it will determine which water supply pump will start first as the main device to avoid the logical conflict of self-start after power failure.

[0141] In actual implementation, the frequency conversion acceleration time of each frequency conversion control cabinet can be set to a preset duration according to actual conditions; each frequency conversion control cabinet is used to restart the water supply pump when the frequency conversion acceleration time reaches the preset duration.

[0142] During the commissioning of the refrigeration system, the inverter control cabinet of the cooling tower water supply pump often displays the following fault code: Acceleration time is too short: Parameters 2202ACCELER TIME 1 (acceleration time 1) and 2205ACCELER TIME 2 (acceleration time 2). After inquiry, the appearance of this fault code indicates that the inverter has a short start-up time of 30 seconds in the factory default setting for acceleration and deceleration time. When the cooling tower needs to be replenished, the pipeline pressure suddenly drops significantly, and it is easy to need to load to full frequency in a short time. At this time, from static to dynamic full frequency, if the acceleration time is too short, the torque required will be greater, and overcurrent will be more likely to occur.

[0143] Therefore, in the specific implementation, the acceleration time of the frequency converter in the frequency converter control cabinet can be appropriately lengthened, generally from the factory default acceleration time of 30 seconds to 60 seconds, which can overcome the defect that when the cooling tower needs to be replenished with water, the inverter acceleration time of the water replenishment pump is too short to provide sufficient water replenishment due to the sudden decrease in pipeline pressure. Since the two sets of cooling tower water replenishment devices are backup for each other, the inverter acceleration time in the two sets of cooling tower water replenishment pump control cabinets must be adjusted. Through the above method, after testing, the water replenishment pump in the cooling tower's water replenishment device has achieved rapid self-start after power failure.

[0144] The restart control system of the refrigeration system provided in the above-mentioned embodiment enables the chiller and the cooling tower water supply device to be equipped with different power supply modes, and by adding a self-start function after power failure in the refrigeration machine control center, adjusting the self-start time after power failure, adding a time relay, etc., it overcomes the problem that during the on-site debugging stage and the certification test stage, the chiller and the cooling tower water supply pump of the refrigeration system cannot achieve the characteristic of rapid self-start after power failure due to equipment technical limitations, logical conflicts, etc. in the prior art.

[0145] Furthermore, the control process of the present application is simple, and it is convenient to replace components such as time relays, which saves the time of returning large equipment to the factory for repair, improves the debugging efficiency of the refrigeration system, and brings social and economic benefits to the construction of the data center.

[0146] The embodiment of the present invention also provides a restart control method for a refrigeration system. Figure 8 As shown, the method comprises the following steps:

[0147] Step S102, when the first switching switch detects that the first power supply module is abnormal in power supply and causes the first controller to shut down, the first switching switch cuts off the connection with the first power supply module and switches to the second power supply module, so as to supply power to the first controller through the second power supply module, so as to restart the first controller;

[0148] Step S104, when the second switching switch of the second power supply unit detects that the first power supply module of the second power supply unit has a power supply abnormality that causes the chiller to shut down, the second switching switch of the second power supply unit sends a first control signal to the second switching cabinet;

[0149] Step S106, when the second switching switch of the third power supply unit detects that the first power supply module of the third power supply unit is abnormal in power supply and causes the chiller to shut down, the second switching switch of the third power supply unit sends a second control signal to the second switching cabinet;

[0150] Step S108, when the second switching cabinet receives the first control signal and the second control signal, it sends a first command signal to each first switch and each second switching switch to control each first switch to open and each second switching switch to switch to the corresponding third power supply module, thereby supplying power to the chiller through the corresponding third power supply module;

[0151] Step S110, when the second switching switch of the second power supply unit detects that the first power supply module or the third power supply module of the second power supply unit is supplying power normally, the second switching switch of the second power supply unit sends a third control signal to the switch to control the switch to switch to the second power supply unit through the switching cabinet body;

[0152] Step S112, when the second switching switch of the second power supply unit detects that the first power supply module or the third power supply module of the second power supply unit is abnormal in power supply, the second switching switch sends a fourth control signal to the switch to control the switch to switch to the third power supply unit through the switching cabinet body;

[0153] Step S114, the first controller is used to control the chiller to restart when it is detected that the chiller is in a power supply state again.

[0154] In the restart control method of the refrigeration system provided in the above embodiment, the first switching switch detects that the first power supply module of the first power supply unit has power supply abnormality, and switches to the second power supply module; the second switching switch detects that the first power supply module has power supply abnormality, and switches to the third power supply unit; the second switching switch detects that the first power supply module or the third power supply module has power supply normal, and controls the switch to switch to the second power supply unit; the first controller detects that the chiller is in power supply state again, and controls the chiller to restart. This solution can automatically realize self-start after power failure, thereby speeding up the self-start time.

[0155] The restart control method for a refrigeration system provided in an embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned restart control system embodiment for a refrigeration system. For the embodiment of the restart control method for a refrigeration system, reference may be made to the corresponding contents in the aforementioned restart control system embodiment for a refrigeration system, which will not be repeated here.

[0156] The embodiment of the present invention further provides an electronic device, see Fig. 9 As shown, the electronic device includes a processor 130 and a memory 133. The memory 133 stores machine executable instructions that can be executed by the processor 130. The processor 130 executes the machine executable instructions to implement the restart control system and method of the refrigeration system.

[0157] Further, Fig. 9 The electronic device shown further includes a bus 134 and a communication interface 135 , and the processor 130 , the communication interface 135 and the memory 133 are connected via the bus 134 .

[0158] The memory 133 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 135 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used. The bus 134 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig. 9 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0159] The processor 130 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 130. The above processor 130 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present invention can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 133, and the processor 130 reads the information in the memory 133 and completes the steps of the method of the above embodiment in combination with its hardware.

[0160] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A restart control system for a refrigeration system, characterized in that: The refrigeration system includes a chiller; the restart control system includes: a first controller, a first power supply unit, a first switching cabinet, a second switching cabinet, a second power supply unit and a third power supply unit; wherein the first switching cabinet includes a switching cabinet body and a switch, and the switch is arranged in the switching cabinet body; The first controller is connected to the chiller and the first power supply unit respectively, and the switch is connected to the chiller; wherein the first power supply unit includes a first switching switch, a first power supply module and a second power supply module, the second power supply unit and the third power supply unit each include a second switching switch, a first switch, a first power supply module and a third power supply module, the first switching switch is connected to the corresponding first power supply module, each of the second switching switches is connected to the corresponding first power supply module through the corresponding first switch, the switching cabinet body is connected to the second power supply unit and the third power supply unit, and the second switching cabinet is connected to each of the second switching switches and each of the first switches; the initial state of the first switch is a closed state; The first switching switch is used to cut off the connection with the first power supply module and switch to the second power supply module when it is detected that the first controller is shut down due to power supply abnormality of the first power supply module, so as to supply power to the first controller through the second power supply module and restart the first controller; The second switching switch of the second power supply unit is used to send a first control signal to the second switching cabinet when it is detected that the first power supply module of the second power supply unit has a power supply abnormality that causes the chiller to shut down; The second switching switch of the third power supply unit is used to send a second control signal to the second switching cabinet when it is detected that the first power supply module of the third power supply unit has a power supply abnormality that causes the chiller to shut down; The second switching cabinet is used for sending a first command signal to each of the first switches and each of the second switching switches when receiving the first control signal and the second control signal, so as to control each of the first switches to open and each of the second switching switches to switch to the corresponding third power supply module, thereby supplying power to the chiller through the corresponding third power supply module; The second switching switch of the second power supply unit is also used to send a third control signal to the switch when it is detected that the first power supply module or the third power supply module of the second power supply unit is supplying power normally, so as to control the switch to switch to the second power supply unit through the switching cabinet body; The second switching switch of the second power supply unit is also used to send a fourth control signal to the switch when it is detected that the first power supply module or the third power supply module of the second power supply unit is abnormal, so as to control the switch to switch to the third power supply unit through the switching cabinet body; The first controller is used to control the chiller to restart when it is detected that the chiller is in a power supply state again.

2. The restart control system according to claim 1, characterized in that: The control system further includes: a bus tie circuit breaker, which is arranged between the first power supply module of the second power supply unit and the first power supply module of the third power supply unit, and is also connected to the second switching cabinet; wherein the initial state of the bus tie circuit breaker is an open state; The second switching cabinet is further used to send a second command signal to the bus tie circuit breaker when receiving the first control signal or the second control signal, so as to control the closing of the bus tie circuit breaker, and then continue to supply power to the chiller through the first power supply module of the third power supply unit or the first power supply module of the second power supply unit; The second switch of the second power supply unit is also used to send a fifth control signal to the second switching cabinet when it is detected that the first power supply module of the third power supply unit also supplies power abnormally; The second switch of the third power supply unit is also used to send a sixth control signal to the second switching cabinet when it is detected that the first power supply module of the second power supply unit has a power supply abnormality; The second switching cabinet is further used to send the first command signal to the bus tie circuit breaker, each of the first switches and each of the second switching switches when receiving the fifth control signal or the sixth control signal, so as to control each of the first switches and the bus tie circuit breaker to open, and each of the second switching switches to switch to the corresponding third power supply module, thereby supplying power to the chiller through the corresponding third power supply module; The second switching switch of the second power supply unit is also used to send the third control signal to the switch to control the switch to switch to the second power supply unit through the switching cabinet body when it is detected that the first power supply module of the second power supply unit or the third power supply module of the second power supply unit or the first power supply module of the third power supply unit is supplying power normally; The second switching switch of the second power supply unit is also used to send the fourth control signal to the switch to control the switch to switch to the third power supply unit through the switching cabinet body when it is detected that the first power supply module of the second power supply unit, the third power supply module of the second power supply unit and the first power supply module of the third power supply unit are all supplying power abnormally.

3. The restart control system according to claim 2, characterized in that: The control system further comprises: a reactor starter cabinet, wherein the reactor starter cabinet is provided with a reactor, and the chiller is connected to the switch via the reactor; The reactor is used to adjust the starting current of the chiller.

4. The restart control system according to claim 3, characterized in that: The reactor starting cabinet is also provided with a comprehensive protector, and the reactor is connected to the switch through the comprehensive protector; The second switch of the second power supply unit is also used to send a seventh control signal to the integrated protector when the first power supply module of the second power supply unit is detected to be abnormal; The second switch of the third power supply unit is also used to send an eighth control signal to the integrated protector when the first power supply module of the third power supply unit is detected to be abnormal; The integrated protector is used to maintain the connection between the reactor and the switch within a preset time interval when receiving the seventh control signal or the eighth control signal; wherein the preset time interval is calculated based on the time required for the first power supply module to switch to the third power supply module.

5. The restart control system according to claim 2, characterized in that: The refrigeration system also includes a cooling tower and a water replenishment device, wherein the cooling tower is connected to the chiller and the water replenishment device respectively; the water replenishment device includes: a water replenishment pump, and a frequency conversion control cabinet connected to the water replenishment pump; the restart control system also includes: a dual power supply cabinet and two power distribution devices, wherein the dual power supply cabinet is connected to the frequency conversion control cabinet and each of the power distribution devices, and each of the power distribution devices is connected to each of the second switching switches in a one-to-one correspondence; wherein each of the power distribution devices includes a power distribution cabinet and a transformer connected in sequence; wherein each of the transformers is connected to the corresponding second switching switch, and each of the power distribution cabinets is connected to the dual power supply cabinet; The second switching switch of the second power supply unit is used to send a first control signal to the second switching cabinet when it is detected that the first power supply module of the second power supply unit has a power supply abnormality that causes the water supply pump to stop; The second switching switch of the third power supply unit is used to send a second control signal to the second switching cabinet when it is detected that the first power supply module of the third power supply unit has a power supply abnormality that causes the water supply pump to stop; The second switching cabinet is used for sending a first command signal to each of the first switches and each of the second switching switches when receiving the first control signal and the second control signal, so as to control each of the first switches to open and each of the second switching switches to switch to the corresponding third power supply module, thereby supplying power to the water supply pump through the corresponding third power supply module; The second switching switch of the second power supply unit is also used to send the third control signal to the dual power supply cabinet to control the dual power supply cabinet to switch to the distribution cabinet corresponding to the second power supply unit when it is detected that the first power supply module or the third power supply module of the second power supply unit is supplying power normally; The second switching switch of the second power supply unit is also used to send the fourth control signal to the dual power supply cabinet to control the dual power supply cabinet to switch to the power distribution cabinet corresponding to the third power supply unit when detecting that the first power supply module or the third power supply module of the second power supply unit is abnormal in power supply; Each of the transformers is used to convert the high voltage output by the corresponding first power supply module or the third power supply module into a low voltage; Each of the power distribution cabinets is used to transmit the low voltage output by the corresponding transformer to the frequency conversion control cabinet through the dual power supply cabinet, so that the frequency conversion control cabinet controls the water supply pump to restart.

6. The restart control system according to claim 5, characterized in that: The second switching cabinet is further used for sending the second command signal to the bus tie circuit breaker when receiving the first control signal or the second control signal, so as to control the closing of the bus tie circuit breaker, and then continue to supply power to the water supply pump through the first power supply module of the third power supply unit or the first power supply module of the second power supply unit; The second switch of the second power supply unit is also used to send a fifth control signal to the second switching cabinet when it is detected that the first power supply module of the third power supply unit also supplies power abnormally; The second switch of the third power supply unit is also used to send a sixth control signal to the second switching cabinet when it is detected that the first power supply module of the second power supply unit has a power supply abnormality; The second switching cabinet is further used to send the first command signal to the bus tie circuit breaker, each of the first switches and each of the second switching switches when receiving the fifth control signal or the sixth control signal, so as to control each of the first switches and the bus tie circuit breaker to open, and each of the second switching switches to switch to the corresponding third power supply module, so as to supply power to the water supply pump through the corresponding third power supply module; The second switching switch of the second power supply unit is also used to send the third control signal to the dual power supply cabinet to control the dual power supply cabinet to switch to the power distribution cabinet corresponding to the second power supply unit when it is detected that the first power supply module of the second power supply unit or the third power supply module of the second power supply unit or the first power supply module of the third power supply unit is supplying power normally; The second switching switch of the second power supply unit is also used to send the fourth control signal to the dual power supply cabinet to control the dual power supply cabinet to switch to the distribution cabinet corresponding to the third power supply unit when it is detected that the first power supply module of the second power supply unit, the third power supply module of the second power supply unit and the first power supply module of the third power supply unit are all supplying power abnormally.

7. The restart control system according to claim 6, characterized in that: There are two water replenishment devices and two dual power supply cabinets, and the water replenishment devices are connected to the dual power supply cabinets one by one, and each dual power supply cabinet is connected to each power distribution cabinet; the restart control system also includes a time relay arranged in the frequency conversion control cabinet of any one of the water replenishment devices; Each of the power distribution cabinets is used to transmit the low voltage output by the corresponding transformer to the two dual power cabinets, so as to transmit it to the corresponding frequency conversion control cabinet of the water replenishment device through the two dual power cabinets; If the time relay is provided in the frequency conversion control cabinet, the time relay is used to start timing when the frequency conversion control cabinet receives the low voltage, and send the timing time to the frequency conversion control cabinet; The frequency conversion control cabinet is used to receive the timing time in real time, and when the timing time reaches a preset value, control the corresponding water supply pump to restart; If the time relay is not provided in the frequency conversion control cabinet, the frequency conversion control cabinet directly controls the corresponding water supply pump to restart when receiving the low voltage.

8. The restart control system according to claim 7, characterized in that: The frequency conversion acceleration time of each of the frequency conversion control cabinets is set to a preset duration; and each of the frequency conversion control cabinets is used to restart the water supply pump when the frequency conversion acceleration time reaches the preset duration.

9. A restart control method for a refrigeration system, characterized in that: The method comprises: When the first switching switch detects that the first controller is shut down due to power supply anomaly of the first power supply module, the first switching switch cuts off the connection with the first power supply module and switches to the second power supply module, so as to supply power to the first controller through the second power supply module, so as to restart the first controller; The second switching switch of the second power supply unit sends a first control signal to the second switching cabinet when detecting that the first power supply module of the second power supply unit has a power supply abnormality that causes the chiller to shut down; The second switching switch of the third power supply unit sends a second control signal to the second switching cabinet when detecting that the first power supply module of the third power supply unit has a power supply abnormality that causes the chiller to shut down; When receiving the first control signal and the second control signal, the second switching cabinet sends a first command signal to each first switch and each second switching switch to control each first switch to open and each second switching switch to switch to the corresponding third power supply module, thereby supplying power to the chiller through the corresponding third power supply module; When the second switching switch of the second power supply unit detects that the first power supply module or the third power supply module of the second power supply unit is supplying power normally, the third switching switch of the second power supply unit sends a third control signal to the switch to control the switch to switch to the second power supply unit through the switching cabinet body; When the second switching switch of the second power supply unit detects that the first power supply module or the third power supply module of the second power supply unit is abnormal in power supply, the fourth control signal is sent to the switch to control the switch to switch to the third power supply unit through the switching cabinet body; The first controller is used to control the chiller to restart when it is detected that the chiller is in a power supply state again.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the method according to claim 9 are implemented.

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