UPS bypass backflow detection method, controller, UPS and storage media

Abstract

This application provides a bypass backflow detection method, controller, UPS, and storage medium for a UPS. The method includes: upon receiving a target detection signal, controlling the target parameter of the UPS inverter output to change according to a preset trend; the target detection signal indicating bypass backflow detection of the UPS; detecting whether the changing trend of the target parameter of the UPS bypass input is the same as the preset trend; if they are the same, determining that bypass backflow has occurred in the UPS. This application can improve the operational reliability of the UPS.

Description

Technical Field

[0001] This application relates to the field of UPS control technology, and in particular to a bypass backflow detection method for a UPS, a controller, a UPS, and a storage medium. Background Technology

[0002] With the continuous development of technology, uninterruptible power supplies (UPS) are being used in increasingly wider fields. The reliability of UPS operations is receiving increasing attention.

[0003] like Figure 1 As shown, existing UPS systems generally have three operating modes: mains power, battery power, and bypass power. Mains power has the highest priority, while bypass power has the lowest. Therefore, bypass backflow prevention detection plays a crucial role in ensuring the reliability of both mains and battery power. A bypass short circuit can directly damage the battery circuitry and power devices on the mains power line, reducing the UPS's operational reliability.

[0004] Currently, most existing bypass backflow prevention methods determine whether a bypass has occurred by detecting the bypass input current. However, when the bypass is short-circuited, the bypass current is very small, requiring higher accuracy in current acquisition, which is difficult for general devices to achieve, making backflow prevention detection quite challenging. Summary of the Invention

[0005] This application provides a method, controller, UPS, and storage medium for detecting UPS bypass backflow, which can achieve accurate detection of UPS bypass backflow without current detection.

[0006] In a first aspect, embodiments of this application provide a bypass backflow detection method for a UPS, including:

[0007] Upon receiving a target detection signal, the target parameters of the inverter output of the UPS are controlled to change according to a preset trend. The target detection signal is used to indicate that a bypass backflow detection is being performed on the UPS.

[0008] Detect whether the changing trend of the target parameter of the UPS bypass input is the same as the preset trend;

[0009] If they are the same, it is determined that the UPS has experienced bypass backflow.

[0010] In one possible implementation, the target parameters controlling the inverter output of the UPS change according to a preset trend, including:

[0011] Within a preset time period, the target parameter controlling the inverter output increases and / or decreases within a first preset fluctuation range according to a preset step size.

[0012] In one possible implementation, detecting whether the changing trend of the target parameter of the UPS bypass input is the same as a preset trend includes:

[0013] If, within a preset time period, the target parameter of the bypass input increases as the target parameter of the inverter output increases, and / or decreases as the target parameter of the inverter output decreases, then it is determined that the changing trend of the target parameter of the bypass input of the UPS is the same as the preset trend.

[0014] In one possible implementation, the target parameters controlling the inverter output of the UPS change according to a preset trend, including:

[0015] Within a preset duration, the target parameter of the inverter output is controlled to change its target value within a second preset fluctuation range;

[0016] Correspondingly, the changing trend of the target parameters of the UPS bypass input is detected to be the same as the preset trend, including:

[0017] Within a preset time period, acquire the change value of the target parameter of the bypass input;

[0018] If the change value is the same as the target value, it is determined that the change trend of the target parameter of the UPS bypass input is the same as the preset trend.

[0019] In one possible implementation, the target parameters include voltage and / or frequency.

[0020] In one possible implementation, the bypass backflow detection method further includes:

[0021] When it is determined that the UPS has experienced bypass backflow, the bypass switch of the UPS will trip.

[0022] Secondly, embodiments of this application provide a bypass backflow detection device for a UPS, comprising:

[0023] The parameter control module is used to control the target parameters of the UPS inverter output to change according to a preset trend when a target detection signal is received. The target detection signal is used to indicate that a bypass backflow detection is being performed on the UPS.

[0024] The first judgment module is used to detect whether the changing trend of the target parameter of the UPS bypass input is the same as the preset trend;

[0025] The second judgment module is used to determine if the UPS has bypass backflow if the values ​​are the same.

[0026] Thirdly, embodiments of this application provide a controller, including a memory and a processor. The memory stores a computer program that can run on the processor. When the processor executes the computer program, it implements the steps of the bypass backflow detection method for a UPS as described in the first aspect or any possible implementation of the first aspect.

[0027] Fourthly, embodiments of this application provide a UPS, including the controller described in the third aspect above.

[0028] Fifthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the UPS bypass backflow detection method as described in the first aspect or any possible implementation of the first aspect.

[0029] This application provides a bypass backflow detection method, controller, UPS, and storage medium for a UPS. By controlling the target parameters of the UPS inverter output to change during backflow prevention detection, a bypass backflow can be determined when the changing trend of the bypass input target parameter is the same as the changing trend of the inverter output target parameter. Accurate detection of UPS bypass backflow can be achieved without the need for a current detection circuit, facilitating timely UPS maintenance and improving UPS reliability. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of an existing UPS provided in an embodiment of this application;

[0032] Figure 2 This is a flowchart illustrating the implementation of the bypass backflow detection method for a UPS provided in this application embodiment;

[0033] Figure 3 This is a schematic diagram of the bypass backflow detection device for a UPS provided in this application embodiment;

[0034] Figure 4 This is a schematic diagram of the controller provided in an embodiment of this application. Detailed Implementation

[0035] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the following description will be provided in conjunction with the accompanying drawings and specific embodiments.

[0037] like Figure 1 As shown, existing UPS systems include three operating modes:

[0038] Mains power supply: First, mains power → AC / DC → DC / AC → AC output;

[0039] Battery powered: Battery → DC / DC → DC / AC → AC output;

[0040] Bypass power supply: Second mains power → Bypass switch → AC output.

[0041] Of these, AC mains power has the highest priority, followed by battery power, and then bypass power has the lowest priority. The first and second AC mains power supplies can be the same or different, depending on the specific configuration.

[0042] In practical applications, if a short circuit occurs in the bypass of the UPS, the UPS output may flow back to the input through the bypass, causing damage to the power components.

[0043] Currently, most existing technologies determine whether a bypass short circuit has occurred by setting up a bypass current detection circuit and detecting the bypass current. However, the bypass short circuit current is relatively small, requiring very high detection accuracy and demanding high-performance components. Ordinary components are difficult to meet the corresponding requirements, making reverse current prevention detection very difficult.

[0044] To address the aforementioned issues, this application provides a bypass backflow detection method for UPS, which eliminates the need for current detection to achieve backflow detection. The details are described below.

[0045] See Figure 2 This illustrates a flowchart of the implementation of the bypass backflow detection method for a UPS provided in an embodiment of this application. Figure 2 As shown, a bypass backflow detection method for a UPS may include steps S101 to S103.

[0046] S101, upon receiving the target detection signal, controls the target parameters of the inverter output of the UPS to change according to a preset trend. The target detection signal is used to indicate that the UPS is being bypassed and backflow detected.

[0047] This application embodiment can output a target detection signal when it is necessary to perform bypass backflow detection on the UPS. For example, the target detection signal can be output after the UPS switches power lines to detect whether bypass backflow has occurred. Alternatively, the target detection signal can be output at preset detection intervals to detect whether bypass backflow has occurred. Or, the target detection signal can be output after the UPS is powered off and then powered on again to detect whether bypass backflow has occurred, etc. The specific settings can be configured according to the actual situation.

[0048] In the embodiments of this application, the target parameter can be a UPS operating parameter other than current. For example, the target parameter can be voltage and / or frequency.

[0049] For example, embodiments of this application can control the voltage of the inverter output of the UPS to change according to a preset trend, and / or can control the frequency of the inverter output of the UPS to change according to a preset trend.

[0050] Specifically, without affecting the UPS power supply, the voltage can be disturbed within a certain voltage range according to a preset trend to increase or decrease the inverter output voltage of the UPS. Alternatively, the frequency can be disturbed within a certain frequency range according to a preset trend to increase or decrease the inverter output frequency of the UPS.

[0051] S102, detect whether the changing trend of the target parameter of the UPS bypass input is the same as the preset trend.

[0052] Under normal circumstances, when no short circuit occurs in the bypass, the output of the UPS or inverter will not affect the bypass input. That is, when no bypass short circuit occurs, the bypass input of the UPS generally does not change with the inverter output of the UPS. However, once the bypass input changes with the inverter output, it can be determined that a bypass short circuit has occurred in the UPS.

[0053] Therefore, in the embodiments of this application, after the target parameters of the inverter output of the UPS are disturbed according to a preset trend, the changing trend of the target parameters of the UPS bypass input can be detected. If the changing trend of the target parameters of the UPS bypass input is consistent with the preset trend, it indicates that the UPS bypass is short-circuited. If the changing trend of the target parameters of the UPS bypass input is inconsistent with the preset trend, it indicates that the UPS bypass is not short-circuited.

[0054] For example, if the target parameter is voltage, and the inverter output voltage of the UPS is controlled to first increase and then decrease according to a preset trend, and if the bypass input voltage of the UPS is detected to first increase and then decrease, it indicates that the change trend of the bypass input voltage of the UPS is the same as the preset trend, and the UPS may be short-circuited. If the bypass input voltage of the UPS is detected to remain unchanged, it indicates that the change trend of the bypass input voltage of the UPS is different from the preset trend, and the UPS bypass is normal.

[0055] For example, if the target parameter is frequency, and the frequency of the UPS inverter output is controlled to decrease and then increase according to a preset trend, and if the frequency of the UPS bypass input is detected to decrease and then increase, it indicates that the frequency change trend of the UPS bypass input is the same as the preset trend, and the UPS may be short-circuited. If the frequency of the UPS bypass input does not change, it indicates that the frequency change trend of the UPS bypass input is different from the preset trend, and the UPS bypass is normal.

[0056] If S103 is the same, it is determined that the UPS has experienced bypass backflow.

[0057] When the trend of the target parameter change of the UPS bypass input is the same as the preset trend, it can be determined that the UPS bypass has backflow. At this time, the UPS bypass has abnormal conduction, and a bypass short circuit may occur.

[0058] In the embodiments of this application, after determining that a bypass backflow has occurred in the UPS, the bypass switch of the UPS can be controlled to trip, thereby breaking the bypass and preventing backflow to other lines of the UPS, thus improving the reliability of the UPS.

[0059] This application embodiment disturbs the target parameters of the UPS inverter output according to a preset trend and detects the changing trend of the target parameters of the UPS bypass input. When the changing trend is consistent with the preset trend, it indicates that backflow has occurred in the UPS bypass. This allows for quick and accurate identification of UPS backflow without the need for a current acquisition circuit, which helps staff maintain the UPS in a timely manner and improves the reliability of the UPS.

[0060] In some embodiments of this application, the "target parameter for controlling the inverter output of the UPS to change according to a preset trend" in S101 above may include:

[0061] Within a preset time period, the target parameter controlling the inverter output increases and / or decreases within a first preset fluctuation range according to a preset step size.

[0062] The preset duration is the time elapsed after receiving the target detection signal; the preset duration can be set according to actual conditions. The first preset fluctuation range is the normal adjustable range of the target parameters.

[0063] Optionally, the target parameters are voltage and / or frequency.

[0064] Within a preset time period after receiving the target detection signal, the UPS inverter output voltage can be controlled to gradually increase within a preset voltage fluctuation range according to a preset voltage step size. Alternatively, within a preset time period after receiving the target detection signal, the UPS inverter output voltage can be controlled to gradually decrease within a preset voltage fluctuation range according to a preset voltage step size. Alternatively, within a preset time period after receiving the target detection signal, the UPS inverter output voltage can be controlled to first gradually increase within a preset voltage fluctuation range according to a preset voltage step size, and then gradually decrease according to a preset voltage step size.

[0065] Alternatively, within a preset time period after receiving the target detection signal, the frequency of the UPS inverter output can be controlled to gradually increase within a preset frequency fluctuation range according to a preset frequency step. Alternatively, within a preset time period after receiving the target detection signal, the frequency of the UPS inverter output can be controlled to gradually decrease within a preset frequency fluctuation range according to a preset frequency step. Alternatively, within a preset time period after receiving the target detection signal, the frequency of the UPS inverter output can be controlled to first gradually increase within a preset frequency fluctuation range according to a preset frequency step, and then gradually decrease according to a preset frequency step.

[0066] Alternatively, within a preset time period after receiving the target detection signal, the voltage output of the UPS inverter can be controlled to gradually increase within a preset voltage fluctuation range according to a preset voltage step size, and then gradually decrease within the same preset voltage step size. Similarly, the frequency output of the UPS inverter can be controlled to gradually increase within a preset frequency fluctuation range according to a preset frequency step size, and then gradually decrease within the same preset frequency step size. Specific settings can be selected based on actual conditions.

[0067] For example, the voltage of the UPS inverter output can be perturbed from -ΔU to +ΔU, and the frequency of the UPS inverter output can be perturbed from -Δf to +Δf.

[0068] Simultaneously, the voltage and frequency of the UPS bypass input are monitored. If the bypass input voltage changes from -a*ΔU to +a*ΔU and the bypass input frequency changes from -b*Δf to +b*Δf, it indicates that the target parameter change trend of the UPS bypass input is consistent with the preset trend, and it is determined that the UPS has experienced bypass backflow. Here, a and b are threshold coefficients, both between 0.5 and 1.5, which can be selected according to the actual situation.

[0069] This application embodiment controls the target parameters of the UPS inverter output to change within a reasonable range according to a preset trend, which can ensure that the normal power supply of the UPS is not affected, and at the same time, it can realize the backflow detection of the UPS bypass.

[0070] In some embodiments of this application, S102 may include:

[0071] If, within a preset time period, the target parameter of the bypass input increases as the target parameter of the inverter output increases, and / or decreases as the target parameter of the inverter output decreases, then it is determined that the changing trend of the target parameter of the bypass input of the UPS is the same as the preset trend.

[0072] Specifically, it can be divided into at least the following three situations:

[0073] The first method: Within a preset time period, the target parameter of the inverter output is controlled to increase within a first preset fluctuation range according to a preset step size in this embodiment of the application.

[0074] If, within a preset time period, the target parameter of the bypass input is detected to increase as the target parameter of the inverter output increases, it can be determined that the trend of the target parameter of the UPS bypass input is the same as the preset trend, indicating that the UPS is experiencing bypass backflow. If, within a preset time period, the target parameter of the bypass input is detected not to change as the target parameter of the inverter output increases, it can be determined that the UPS bypass is normal.

[0075] The second method: Within a preset time period, the target parameter of the inverter output is controlled to decrease within a first preset fluctuation range according to a preset step size in this embodiment of the application.

[0076] If, within a preset time period, the target parameter of the bypass input is detected to decrease as the target parameter of the inverter output decreases, it can be determined that the changing trend of the target parameter of the UPS bypass input is the same as the preset trend, indicating that the UPS is experiencing bypass backflow. If, within a preset time period, the target parameter of the bypass input is detected not to change as the target parameter of the inverter output decreases, it can be determined that the UPS bypass is normal.

[0077] The third method: Within a preset time period, the target parameter of the inverter output controlled by this application embodiment is increased-decreased-increased-decreased sequentially within a first preset fluctuation range according to a preset step size.

[0078] If, within a preset time period, the target parameter of the bypass input is detected to increase-decrease-increase-decrease in tandem with the target parameter of the inverter output, it can be determined that the trend of the target parameter of the UPS bypass input is the same as the preset trend, indicating that the UPS is experiencing bypass backflow. If, within a preset time period, the target parameter of the bypass input is detected not to change with the target parameter of the inverter output, or the trend of change is inconsistent, it can be determined that the UPS bypass is normal.

[0079] In the embodiments of this application, the trend of the target parameter is increasing, which can be understood as the current target parameter value being higher than the target parameter value at the previous time step. The trend of the target parameter is decreasing, which can be understood as the current target parameter value being lower than the target parameter value at the previous time step.

[0080] This application embodiment can accurately determine whether bypass backflow has occurred by analyzing the changing trend of the target parameters of the bypass input, without the need to set up a complex current acquisition circuit, which can improve the working stability of the UPS.

[0081] In some embodiments of this application, the "target parameter for controlling the inverter output of the UPS to change according to a preset trend" in S101 above may include:

[0082] Within a preset duration, the target parameter of the inverter output is controlled to change its target value within a second preset fluctuation range;

[0083] Correspondingly, the changing trend of the target parameters of the UPS bypass input is detected to be the same as the preset trend, including:

[0084] Within a preset time period, acquire the change value of the target parameter of the bypass input;

[0085] If the change value is the same as the target value, it is determined that the change trend of the target parameter of the UPS bypass input is the same as the preset trend.

[0086] Upon receiving the target detection signal, this embodiment of the application can control the target parameter output by the inverter to change its value within a second preset fluctuation range within a preset time period. The second preset fluctuation range is the normal fluctuation range of the target parameter. Adjusting the target parameter within the second preset fluctuation range does not affect the normal operation of the UPS.

[0087] After adjusting the target parameter and target value, the change value of the target parameter input by the bypass can be obtained within a preset time period, and the change value and target value can be compared to determine whether the two change trends are the same.

[0088] For example, after receiving the target detection signal, the inverter output voltage can be adjusted from 220V to 225V by changing the given value of the inverter output voltage, with the target value being +5V.

[0089] If the bypass input voltage of the UPS is detected to change from 220V to 225V, then the change in bypass input voltage is +5V. Specifically, inverter output - bypass input = 225V - 225V = 0V, which is a relatively small value.

[0090] At this point, +5V = +5V, that is, the target value = the change value. Therefore, it can be determined that the change trend of the target parameter of the UPS bypass input is the same as the preset trend, and bypass backflow may occur.

[0091] For example, after receiving the target detection signal, the inverter output voltage can be adjusted from 220V to 225V by changing the given value of the inverter output voltage, with the target value being +5V.

[0092] If the bypass input voltage of the UPS remains unchanged at 220V, then the change in the bypass input voltage is 0V. Specifically, inverter output - bypass input = 225V - 220V = 5V, which is a relatively large value.

[0093] At this point, +5V ≠ 0V, that is, the target value ≠ the change value, so it can be determined that the trend of the target parameter change of the UPS bypass input is different from the preset trend, and no bypass backflow has occurred.

[0094] For example, after receiving a target detection signal, the inverter output voltage can be adjusted from 220V to 222V by changing the setpoint of the inverter output voltage, with the target value being +2V.

[0095] If the bypass input voltage of the UPS remains unchanged at 220V, then the change in the bypass input voltage is 0V. Specifically, inverter output - bypass input = 222V - 220V = 2V, which is a relatively small value.

[0096] At this point, +2V ≠ 0V, that is, the target value ≠ the change value, so it can be determined that the change trend of the target parameter of the UPS bypass input is different from the preset trend, and no bypass backflow has occurred.

[0097] As can be seen from the above, by comparing the trends between the target value and the change value, it is possible to accurately determine whether bypass backflow has occurred. When the target value equals the change value, it indicates that the bypass input and inverter output have the same trend, and bypass backflow can be determined to have occurred. When the target value does not equal the change value, it indicates that the bypass input and inverter output have different trends, and bypass backflow can be determined not to have occurred.

[0098] Furthermore, while the difference between the inverter output and the bypass input can, to some extent, indicate the degree and trend of their divergence, as seen in the above embodiments, when the fluctuations in the inverter output and bypass input are small, it is difficult to accurately determine whether bypass backflow has occurred based solely on their difference. Therefore, this embodiment uses the equality between the target value and the change value to accurately determine whether bypass backflow has occurred.

[0099] In the embodiments of this application, if the absolute value of the difference between the changed value and the target value is less than or equal to a preset value, it can be determined that the changed value and the target value are the same.

[0100] For example, with a preset value of 1V, after receiving a target detection signal, the inverter output voltage can be adjusted from 220V to 218V by changing the given value of the inverter output voltage, with the target value being -2V.

[0101] If the bypass input voltage of the UPS is detected to change from 220V to 218.2V at this time, the change value of the bypass input voltage is -1.8V.

[0102] As can be seen from the above, |target value - change value| = |-2V + 1.8V| = 0.2V ≤ 1V, which indicates that the target value and the change value are the same. It can be determined that the change trend of the target parameter of the UPS bypass input is the same as the preset trend, and bypass backflow may occur.

[0103] This application embodiment controls the target parameter of the inverter output to change to a target value, and then judges the trend of the target value and the target parameter of the bypass input. Based on the result, it determines whether the bypass input of the UPS follows the change of the inverter output, thereby effectively judging whether a bypass short circuit has occurred, ensuring effective handling when bypass backflow occurs, and improving the working reliability of the UPS.

[0104] In some embodiments of this application, the bypass backflow detection method for the UPS may further include:

[0105] If the UPS inverter has no output and the UPS bypass switch is not closed, and the bypass output voltage is detected to be the same as the bypass input voltage, then the UPS is determined to be short-circuited, and the UPS may experience reverse current.

[0106] This application embodiment perturbs the voltage and / or frequency of the UPS inverter output and detects whether the voltage and / or frequency of the UPS bypass input changes in the same trend, thereby determining whether the UPS bypass is short-circuited and performing accurate reverse current identification of the UPS. It eliminates the need to monitor bypass current and set up high-precision current acquisition circuits, effectively improving the operational reliability of the UPS.

[0107] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0108] The following are device embodiments of this application. For details not described in detail, please refer to the corresponding method embodiments described above.

[0109] Figure 3A schematic diagram of the bypass backflow detection device for a UPS provided in an embodiment of this application is shown. For ease of explanation, only the parts relevant to the embodiment of this application are shown, and are described in detail below:

[0110] like Figure 3 As shown, the UPS bypass backflow detection device 20 may include:

[0111] The parameter control module 201 is used to control the target parameters of the inverter output of the UPS to change according to a preset trend when the target detection signal is received. The target detection signal is used to indicate that the UPS is being bypassed and backflow detected.

[0112] The first judgment module 202 is used to detect whether the changing trend of the target parameter of the UPS bypass input is the same as the preset trend.

[0113] The second judgment module 203 is used to determine that the UPS has experienced bypass backflow if the two conditions are the same.

[0114] In some embodiments of this application, the parameter control module 201 can also be used to control the target parameter of the inverter output to increase and / or decrease within a first preset fluctuation range according to a preset step size within a preset time period.

[0115] In some embodiments of this application, the first judgment module 202 is further configured to determine that the changing trend of the target parameter of the bypass input of the UPS is the same as the preset trend if, within a preset time period, the target parameter of the bypass input increases as the target parameter of the inverter output increases, and / or decreases as the target parameter of the inverter output decreases.

[0116] In some embodiments of this application, the parameter control module 201 can also be used to control the target parameter of the inverter output to change the target value within a second preset fluctuation range within a preset time period.

[0117] Correspondingly, the first judgment module 202 is also used to obtain the change value of the target parameter of the bypass input within a preset time period;

[0118] If the change value is the same as the target value, it is determined that the change trend of the target parameter of the UPS bypass input is the same as the preset trend.

[0119] In some embodiments of this application, the target parameters include voltage and / or frequency.

[0120] In some embodiments of this application, the detection device may further include:

[0121] The third judgment module is used to control the UPS bypass switch to trip when it is determined that the UPS has experienced bypass backflow.

[0122] Figure 4This is a schematic diagram of the controller provided in an embodiment of this application. Figure 4 As shown, the controller 30 in this embodiment includes a processor 300 and a memory 301. The memory 301 stores a computer program 302 that can run on the processor 300. When the processor 300 executes the computer program 302, it implements the steps in the bypass backflow detection method embodiments of the various UPS described above. Alternatively, when the processor 300 executes the computer program 302, it implements the functions of each module / unit in the various device embodiments described above.

[0123] For example, computer program 302 may be divided into one or more modules / units, one or more of which are stored in memory 301 and executed by processor 300 to complete this application. One or more modules / units may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of computer program 302 in controller 30.

[0124] The controller 30 may include, but is not limited to, a processor 300 and a memory 301. Those skilled in the art will understand that... Figure 4 This is merely an example of controller 30 and does not constitute a limitation on controller 30. It may include more or fewer components than shown, or combine certain components, or different components. For example, the controller may also include input / output devices, network access devices, buses, etc.

[0125] The processor 300 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0126] The memory 301 can be an internal storage unit of the controller 30, such as a hard disk or RAM of the controller 30. The memory 301 can also be an external storage device of the controller 30, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the controller 30. Furthermore, the memory 301 can include both internal and external storage units of the controller 30. The memory 301 is used to store computer programs and other programs and data required by the controller. The memory 301 can also be used to temporarily store data that has been output or will be output.

[0127] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0128] This application embodiment may also provide a UPS, including the controller 30 as described above.

[0129] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0130] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0131] In the embodiments provided in this application, it should be understood that the disclosed devices / controllers and methods can be implemented in other ways. For example, the device / controller embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0132] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0133] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0134] If an integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium. When executed by a processor, the computer program can implement the steps of the bypass backflow detection method embodiments of the various UPS described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0135] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method of bypass backfeed detection for an UPS, characterized by, Comprising: Upon receiving a target detection signal, controlling a target parameter of an inverter output of the UPS to change according to a preset trend, the target detection signal being used to indicate bypass reverse-feeding detection on the UPS; wherein the target parameter comprises voltage and / or frequency; Detecting whether a change trend of a target parameter of a bypass input of the UPS is same as the preset trend; If same, determining that the UPS has bypass reverse-feeding.

2. The bypass inrush detection method for a UPS of claim 1, wherein, The controlling of the target parameter of the inverter output of the UPS to change according to the preset trend comprises: Within a preset time length, controlling the target parameter of the inverter output to increase and / or decrease according to a preset step length within a first preset fluctuation range.

3. The bypass backfeed detection method for a UPS of claim 2, wherein, The detecting of whether the change trend of the target parameter of the bypass input of the UPS is same as the preset trend comprises: If within the preset time length, the target parameter of the bypass input increases with the increase of the target parameter of the inverter output, and / or decreases with the decrease of the target parameter of the inverter output, then determining that the change trend of the target parameter of the bypass input of the UPS is same as the preset trend.

4. The bypass inrush detection method for a UPS of claim 1, wherein, The controlling of the target parameter of the inverter output of the UPS to change according to the preset trend comprises: Within a preset time length, controlling the target parameter of the inverter output to change a target number of values within a second preset fluctuation range; Correspondingly, the detecting of whether the change trend of the target parameter of the bypass input of the UPS is same as the preset trend comprises: Within the preset time length, acquiring a change value of the target parameter of the bypass input; If the change value is same as the target number of values, then determining that the change trend of the target parameter of the bypass input of the UPS is same as the preset trend.

5. The bypass inrush detection method for a UPS of claim 1, wherein, Further comprising: Upon determining that the UPS has bypass reverse-feeding, controlling a bypass switch of the UPS to trip.

6. A bypass backfeed detection device for a UPS, characterized by, Comprising: A parameter control module, configured to, upon receiving a target detection signal, control a target parameter of an inverter output of the UPS to change according to a preset trend, the target detection signal being used to indicate bypass reverse-feeding detection on the UPS; wherein the target parameter comprises voltage and / or frequency; A first judging module, configured to detect whether a change trend of a target parameter of a bypass input of the UPS is same as the preset trend; A second judging module, configured to, if same, determine that the UPS has bypass reverse-feeding.

7. A controller comprising a memory and a processor, the memory having stored therein a computer program executable on the processor, characterized in that, The processor executes the computer program to implement the steps of the bypass reverse-feeding detection method of the UPS according to any one of claims 1 to 5.

8. A UPS characterized by, The controller according to claim 7.

9. A computer-readable storage medium storing a computer program, the computer program comprising instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 8. The computer program is executed by the processor to implement the steps of the bypass reverse-feeding detection method of the UPS according to any one of claims 1 to 5.

Images