CN118169602A - Bypass reverse-filling detection method of UPS, controller, UPS and storage medium - Google Patents

Abstract

The application provides a bypass reverse-filling detection method of a UPS, a controller, the UPS and a storage medium. The method comprises the following steps: when a target detection signal is received, controlling the inversion output target parameter of the UPS to change according to a preset trend, wherein the target detection signal is used for representing bypass reverse irrigation detection of the UPS; detecting whether the change trend of the target parameter of the bypass input of the UPS is the same as the preset trend; if the bypass reverse irrigation is the same, the bypass reverse irrigation of the UPS is judged. The application can improve the working reliability of the UPS.

Description

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

Technical Field

The present application relates to the field of UPS control technology, and in particular to a UPS bypass backfeed detection method, a controller, a UPS and a storage medium.

Background technique

With the continuous development of science and technology, the application of uninterruptible power supply (UPS) is becoming more and more extensive, and the working reliability of UPS has received more and more attention.

As shown in Figure 1, existing UPS generally has three working modes, namely, mains power supply, battery power supply and bypass power supply. Among them, mains power supply has the highest priority, and bypass power supply has the lowest priority. Therefore, bypass anti-backflow detection plays an extremely important role in ensuring mains power supply and battery power supply. Once a bypass short circuit occurs, it may directly damage the power devices on the battery circuit and the mains circuit, reducing the working reliability of the UPS.

At present, most of the existing bypass backfeed prevention methods detect bypass input current to determine whether bypass occurs. However, when the bypass is short-circuited, the bypass current is very small, which requires higher requirements for current acquisition accuracy, which is difficult for general devices to achieve, and the backfeed prevention detection is difficult.

Summary of the invention

The embodiments of the present application provide a UPS bypass backfeed detection method, a controller, a UPS, and a storage medium, which can achieve accurate detection of UPS bypass backfeed without current detection.

In a first aspect, an embodiment of the present application provides a bypass backflow detection method for a UPS, comprising:

When receiving the target detection signal, the target parameter of the inverter output of the UPS is controlled to change according to the preset trend. The target detection signal is used to indicate that the bypass backfeed detection is performed on the UPS;

Check whether the change trend of the target parameter of the bypass input of the UPS is the same as the preset trend;

If they are the same, it is determined that the UPS has bypass backfeed.

In a possible implementation, controlling the target parameter of the inverter output of the UPS to change according to a preset trend includes:

Within a preset time period, the target parameter of the inverter output is controlled to increase and/or decrease according to a preset step size within a first preset fluctuation range.

In a possible implementation, detecting whether a change trend of a target parameter of a bypass input of a UPS is the same as a preset trend includes:

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, it is determined that the change trend of the target parameter of the bypass input of the UPS is the same as the preset trend.

In a possible implementation, controlling the target parameter of the inverter output of the UPS to change according to a preset trend includes:

Within a preset time period, the target parameter of the inverter output is controlled to change to a target value within a second preset fluctuation range;

Accordingly, detecting whether the change trend of the target parameter of the bypass input of the UPS is the same as the preset trend includes:

Obtain the change value of the target parameter of the bypass input within a preset time period;

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

In a possible implementation, the target parameter includes voltage and/or frequency.

In a possible implementation, the bypass backfeed detection method further includes:

When it is determined that bypass backfeed occurs in the UPS, the bypass switch of the UPS is controlled to trip.

In a second aspect, an embodiment of the present application provides a bypass backflow detection device for a UPS, comprising:

A parameter control module, used to control the target parameter of the inverter output of the UPS to change according to a preset trend when receiving a target detection signal, and the target detection signal is used to indicate that a bypass backfeed detection is performed on the UPS;

A first judgment module is used to detect whether a change trend of a target parameter of a bypass input of the UPS is the same as a preset trend;

The second judgment module is used to determine that bypass backfeed occurs in the UPS if the two conditions are the same.

In a third aspect, an embodiment of the present application provides a controller including a memory and a processor, wherein the memory stores a computer program that can be executed on the processor, and when the processor executes the computer program, it implements the steps of the bypass backfeed detection method of a UPS as described in the first aspect or any possible implementation method of the first aspect.

In a fourth aspect, an embodiment of the present application provides a UPS, comprising the controller according to the third aspect above.

In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the steps of the bypass backflow detection method of a UPS as described in the first aspect or any possible implementation method of the first aspect.

The present application provides a UPS bypass backfeed detection method, controller, UPS and storage medium, which controls the target parameters of the UPS inverter output to change when the UPS is subjected to anti-backfeed detection. When it is detected that the change trend of the target parameter of the bypass input is the same as the change trend of the target parameter of the inverter output, it can be determined that the UPS has bypass backfeed. Accurate detection of UPS bypass backfeed can be achieved without setting up a current detection circuit, which helps the staff to maintain the UPS in time and improve the working reliability of the UPS.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

FIG1 is a schematic structural diagram of an existing UPS provided in an embodiment of the present application;

FIG2 is a flow chart of a bypass backflow detection method for a UPS provided in an embodiment of the present application;

3 is a schematic diagram of the structure of a bypass backflow detection device for a UPS provided in an embodiment of the present application;

FIG. 4 is a schematic diagram of a controller provided in an embodiment of the present application.

Detailed ways

In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

In order to make the purpose, technical solutions and advantages of the present application clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

As shown in FIG1 , the existing UPS includes three working modes, namely:

Mains power supply: first mains → AC/DC → DC/AC → AC output;

Battery power supply: battery → DC/DC → DC/AC → AC output;

Bypass power supply: Second AC power → bypass switch → AC output.

Among them, the priority of the mains power supply is the highest, the priority of the battery power supply is the second, and the priority of the bypass power supply is the lowest. Among them, the first mains power supply and the second mains power supply can be the same or different, and can be set according to actual conditions.

In actual applications, if the bypass of the UPS is short-circuited, the output of the UPS may be fed back to the input through the bypass, causing damage to the power devices of the device.

At present, most of the existing technologies set up a bypass current detection circuit to determine whether a bypass short circuit occurs by detecting the bypass current. However, the bypass short circuit current is small, and the detection accuracy is very high, and the device requirements are high. It is difficult for general devices to meet the corresponding requirements, and anti-backflow detection is very difficult.

In order to solve the above problem, the embodiment of the present application provides a bypass backfeed detection method for a UPS, which can realize backfeed detection without current detection.

Referring to Fig. 2, it shows a flowchart of the bypass backfeed detection method of a UPS provided in an embodiment of the present application. As shown in Fig. 2, a bypass backfeed detection method of a UPS may include S101 to S103.

S101, when a target detection signal is received, a target parameter of an inverter output of the UPS is controlled to change according to a preset trend, wherein the target detection signal is used to indicate a bypass backfeed detection for the UPS.

The embodiment of the present application can output a target detection signal when it is necessary to detect bypass backflow of the UPS. For example, the target detection signal can be output after the UPS switches the power supply line to detect whether backflow occurs in the bypass. Alternatively, the target detection signal is output at each preset detection time interval to detect whether backflow occurs in the bypass. Alternatively, the target detection signal is output after the UPS is powered off and then powered on to detect whether backflow occurs in the bypass, etc., which can be specifically set according to actual conditions.

In the embodiment of the present application, the target parameter may be an operating parameter of the UPS other than the current, for example, the target parameter may be the voltage and/or the frequency.

Illustratively, the embodiments of the present 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.

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

S102, detecting whether a change trend of a target parameter of a bypass input of the UPS is the same as a preset trend.

Under normal circumstances, when there is no bypass short circuit, the output of UPS or inverter will not affect the bypass input. In other words, when there is no bypass short circuit, the bypass input of UPS generally does not change with the inverter output of UPS. Once the bypass input changes with the inverter output, it can be determined that the UPS has a bypass short circuit.

Therefore, in an embodiment of the present application, after the target parameter of the inverter output of the UPS is controlled to be disturbed according to a preset trend, the change trend of the target parameter of the bypass input of the UPS can be detected. If the change trend of the target parameter of the bypass input of the UPS is consistent with the preset trend, it can be indicated that the bypass of the UPS is short-circuited. If the change trend of the target parameter of the bypass input of the UPS is inconsistent with the preset trend, it can be indicated that the bypass of the UPS is not short-circuited.

For example, the target parameter is voltage. After the voltage of the inverter output of the UPS is controlled to increase first and then decrease according to a preset trend, if it is detected that the voltage of the bypass input of the UPS increases first and then decreases, it can be indicated that the change trend of the voltage of the bypass input of the UPS is the same as the preset trend, and the UPS may be short-circuited. If it is detected that the voltage of the bypass input of the UPS has not changed, it can be indicated that the change trend of the voltage of the bypass input of the UPS is different from the preset trend, and the UPS bypass is normal.

For example, the target parameter is frequency. After the frequency of the inverter output of the UPS is controlled to decrease first and then increase according to a preset trend, if it is detected that the frequency of the bypass input of the UPS decreases first and then increases, it can be indicated that the change trend of the frequency of the bypass input of the UPS is the same as the preset trend, and the UPS may be short-circuited. If it is detected that the frequency of the bypass input of the UPS has not changed, it can be indicated that the change trend of the frequency of the bypass input of the UPS is different from the preset trend, and the UPS bypass is normal.

S103: If they are the same, it is determined that bypass backfeed occurs in the UPS.

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

In an embodiment of the present application, after determining that bypass backflow occurs in the UPS, the bypass switch of the UPS can be controlled to trip to achieve bypass circuit breaker, thereby preventing the bypass from backflowing to other lines of the UPS and improving the working reliability of the UPS.

The embodiment of the present application disturbs the target parameter of the inverter output of the UPS according to a preset trend, and detects the change trend of the target parameter of the UPS bypass input. When the change trend is consistent with the preset trend, it indicates that backfeeding has occurred in the UPS bypass, thereby quickly and accurately identifying UPS backfeeding without setting up a current acquisition circuit, which helps staff to maintain the UPS in a timely manner and improves the working reliability of the UPS.

In some embodiments of the present application, the “controlling the target parameter of the inverter output of the UPS to change according to a preset trend” in the above S101 may include:

Within a preset time period, the target parameter of the inverter output is controlled to increase and/or decrease according to a preset step size within a first preset fluctuation range.

The preset duration is a period of time after receiving the target detection signal, and the preset duration can be set according to actual conditions. The first preset fluctuation range is the normal adjustable range of the target parameter.

Optionally, the target parameter is voltage and/or frequency.

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

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

Alternatively, within a preset time after receiving the target detection signal, the voltage of the UPS inverter output can be controlled to gradually increase according to a preset voltage step within a preset voltage fluctuation range, and then gradually decrease according to the preset voltage step, and the frequency of the UPS inverter output can be controlled to gradually increase according to a preset frequency step within a preset frequency fluctuation range, and then gradually decrease according to the preset frequency step. The specific settings can be selected according to actual conditions.

Exemplarily, the voltage of the inverter output of the UPS may be controlled to be disturbed from -ΔU to +ΔU, and the frequency of the inverter output of the UPS may be controlled to be disturbed from -Δf to +Δf.

At the same time, the voltage and frequency of the bypass input of the UPS are detected. If the bypass input voltage is detected to change from -a*ΔU to +a*ΔU, and the bypass input frequency is detected to change from -b*Δf to +b*Δf, it can be shown that the target parameter change trend of the bypass input of the UPS is consistent with the preset trend, and the UPS is judged to have bypass backfeed. Among them, a and b are threshold coefficients, and a and b are both between 0.5-1.5, which can be selected according to actual conditions.

The embodiment of the present application controls the target parameters of the inverter output of the UPS to change according to a preset trend within a reasonable range, thereby ensuring that the normal power supply of the UPS is not affected, and at the same time, backflow detection of the UPS bypass can be realized.

In some embodiments of the present application, the above S102 may include:

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, it is determined that the change trend of the target parameter of the bypass input of the UPS is the same as the preset trend.

There are at least three situations:

The first type: within a preset time period, the embodiment of the present application controls the target parameter of the inverter output to increase according to a preset step size within a first preset fluctuation range.

If the bypass input target parameter is detected to increase with the increase of the inverter output target parameter within the preset time, it can be determined that the change trend of the bypass input target parameter of the UPS is the same as the preset trend, indicating that the UPS has bypass backfeed. If the bypass input target parameter is detected not to change with the increase of the inverter output target parameter within the preset time, it can be determined that the UPS bypass is normal.

The second type: within a preset time period, the target parameter of the inverter output is controlled by the embodiment of the present application to be reduced according to a preset step size within a first preset fluctuation range.

If the bypass input target parameter is detected to decrease with the decrease of the inverter output target parameter within the preset time, it can be determined that the change trend of the bypass input target parameter of the UPS is the same as the preset trend, indicating that the UPS has bypass backfeed. If the bypass input target parameter is detected not to change with the decrease of the inverter output target parameter within the preset time, it can be determined that the UPS bypass is normal.

The third type: within a preset time length, the embodiment of the present application controls the target parameter of the inverter output to increase-decrease-increase-decrease in sequence according to a preset step length within a first preset fluctuation range.

If the bypass input target parameter is detected to increase-decrease-increase-decrease with the inverter output target parameter within the preset time, it can be determined that the change trend of the bypass input target parameter of the UPS is the same as the preset trend, indicating that the UPS has bypass backfeed. If the bypass input target parameter is detected to not change with the inverter output target parameter within the preset time, or the change trend is inconsistent, it can be determined that the UPS bypass is normal.

In the embodiment of the present application, the trend of the target parameter is increasing, which can be understood as the parameter value of the current target parameter is higher than the parameter value of the target parameter at the previous moment. The trend of the target parameter is decreasing, which can be understood as the parameter value of the current target parameter is lower than the parameter value of the target parameter at the previous moment.

The embodiment of the present application can accurately determine whether bypass backfeed occurs by analyzing the change trend of the target parameter of the bypass input, without setting up a complex current acquisition circuit, and can improve the working stability of the UPS.

In some embodiments of the present application, the “controlling the target parameter of the inverter output of the UPS to change according to a preset trend” in the above S101 may include:

Within a preset time period, the target parameter of the inverter output is controlled to change to a target value within a second preset fluctuation range;

Accordingly, detecting whether the change trend of the target parameter of the bypass input of the UPS is the same as the preset trend includes:

Obtain the change value of the target parameter of the bypass input within a preset time period;

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

After receiving the target detection signal, the embodiment of the present application can control the target parameter of the inverter output to change the target value within the second preset fluctuation range within the preset time length, wherein the second preset fluctuation range is the fluctuation range of the target parameter in normal operation. Adjusting the target parameter within the second preset fluctuation range does not affect the normal operation of the UPS.

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

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, and the target value is +5V.

If it is detected that the bypass input voltage of the UPS changes from 220 V to 225 V, the change value of the bypass input voltage is +5 V. Among them, inverter output-bypass input=225 V-225 V=0 V, which is a smaller value.

At this time, +5V=+5V, that is, the target value=the change value, then it can be determined that the change trend of the target parameter of the bypass input of the UPS is the same as the preset trend, and bypass backfeed may occur.

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, and the target value is +5V.

If it is detected that the bypass input voltage of the UPS remains unchanged at 220 V, the change value of the bypass input voltage is 0 V. Among them, inverter output - bypass input = 225 V - 220 V = 5 V, which is a larger value.

At this time, +5V≠0V, that is, the target value≠the change value, then it can be determined that the change trend of the target parameter of the bypass input of the UPS is different from the preset trend, and bypass backfeed does not occur.

For example, after receiving the target detection signal, the inverter output voltage can be adjusted from 220V to 222V by changing the given value of the inverter output voltage, and the target value is +2V.

If it is detected that the bypass input voltage of the UPS remains unchanged at 220 V, the change value of the bypass input voltage is 0 V. Among them, inverter output - bypass input = 222 V - 220 V = 2 V, which is a smaller value.

At this time, +2V≠0V, that is, the target value≠the change value, then it can be determined that the change trend of the target parameter of the bypass input of the UPS is different from the preset trend, and bypass backfeed does not occur.

As can be seen from the above, by comparing the trend between the target value and the change value, it is possible to accurately determine whether bypass reverse charging has occurred. When the target value = the change value, it indicates that the change trends of the bypass input and the inverter output are the same, and it can be determined that bypass reverse charging has occurred. When the target value ≠ the change value, it indicates that the change trends of the bypass input and the inverter output are different, and it can be determined that bypass reverse charging has not occurred.

In addition, although the difference between the inverter output and the bypass input can be used to determine the difference and trend of the two to a certain extent, as can be seen in the above embodiment, when the inverter output and the bypass input fluctuate slightly, it is difficult to accurately determine whether bypass backfeeding occurs based on the difference between the two. Therefore, the embodiment of the present application uses whether the target value and the change value are equal to achieve accurate judgment of whether bypass backfeeding occurs.

In an embodiment of the present application, if the absolute value of the difference between the change value and the target value is less than or equal to a preset value, it can be determined that the change value is the same as the target value.

For example, the preset value is 1V. After receiving the target detection signal, the inverter output voltage can be adjusted from 220V to 218V by changing the given value of the inverter output voltage, and the target value is -2V.

If it is detected that the bypass input voltage of the UPS changes from 220V to 218.2V at this time, the change value of the bypass input voltage is -1.8V.

From the above, it can be seen that |target value-change value|=|-2V+1.8V|=0.2V≤1V, which means 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 bypass input of the UPS is the same as the preset trend, and bypass backfeed may occur.

The embodiment of the present application controls the target parameter change of the inverter output to a target value, and then performs trend judgment on the target value and the change value of the target parameter of the bypass input. According to the result, it is judged whether the bypass input of the UPS follows the inverter output change, thereby effectively judging whether a bypass short circuit occurs, ensuring effective processing when bypass backflow occurs, and improving the working reliability of the UPS.

In some embodiments of the present application, the bypass backfeed detection method of the UPS may further include:

When the UPS inverter has no output and the bypass switch of the UPS is not closed, if it is detected that the bypass output voltage is the same as the bypass input voltage, the UPS is judged to be short-circuited and the UPS may be back-fed.

The embodiment of the present application disturbs the voltage and/or frequency of the inverter output of the UPS, and detects whether the voltage and/or frequency of the bypass input of the UPS changes in the same trend, thereby determining whether the UPS bypass is short-circuited, and accurately identifying the backflow of the UPS. There is no need to monitor the bypass current, and there is no need to set a high-precision current acquisition circuit, which can effectively improve the working reliability of the UPS.

It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean 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 the present application.

The following is an embodiment of the device of the present application. For details not described in detail, please refer to the corresponding method embodiment described above.

FIG3 shows a schematic diagram of the structure of a bypass backflow detection device of a UPS provided in an embodiment of the present application. For the sake of convenience, only the part related to the embodiment of the present application is shown, which is described in detail as follows:

As shown in FIG3 , the bypass backflow detection device 20 of the UPS may include:

The parameter control module 201 is used to control the target parameter of the inverter output of the UPS to change according to a preset trend when receiving a target detection signal, and the target detection signal is used to indicate that the bypass backfeed detection is performed on the UPS;

The first judgment module 202 is used to detect whether the change trend of the target parameter of the bypass input of the UPS is the same as the preset trend;

The second judgment module 203 is used to determine that bypass backfeed occurs in the UPS if the two values are the same.

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

In some embodiments of the present application, the first judgment module 202 is also used to determine that the change 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.

In some embodiments of the present application, the parameter control module 201 may 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;

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

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

In some embodiments of the present application, the target parameter includes voltage and/or frequency.

In some embodiments of the present application, the detection device may further include:

The third judgment module is used to control the bypass switch of the UPS to trip when it is determined that bypass backflow occurs in the UPS.

FIG4 is a schematic diagram of a controller provided in an embodiment of the present application. As shown in FIG4, the controller 30 of this embodiment includes: a processor 300 and a memory 301, and the memory 301 stores a computer program 302 that can be run on the processor 300. When the processor 300 executes the computer program 302, the steps in the bypass backflow detection method embodiments of the above-mentioned UPS are implemented. Alternatively, when the processor 300 executes the computer program 302, the functions of each module/unit in the above-mentioned device embodiments are implemented.

Exemplarily, the computer program 302 may be divided into one or more modules/units, one or more modules/units are stored in the memory 301, and are executed by the processor 300 to complete the present application. One or more modules/units may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program 302 in the controller 30.

The controller 30 may include, but is not limited to, a processor 300 and a memory 301. Those skilled in the art will appreciate that FIG4 is merely an example of the controller 30 and does not limit the controller 30. The controller 30 may include more or fewer components than shown in the figure, or may combine certain components, or different components. For example, the controller may also include input and output devices, network access devices, buses, etc.

The processor 300 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) 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, etc.

The memory 301 may be an internal storage unit of the controller 30, such as a hard disk or memory of the controller 30. The memory 301 may also be an external storage device of the controller 30, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the controller 30. Further, the memory 301 may also include both an internal storage unit of the controller 30 and an external storage device. The memory 301 is used to store computer programs and other programs and data required by the controller. The memory 301 may also be used to temporarily store data that has been output or is to be output.

The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by 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 embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

The embodiment of the present application may also provide a UPS, including the controller 30 as described above.

In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example 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 performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

In the embodiments provided in the present 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 schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

If the integrated module/unit is implemented in the form of 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, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the bypass backflow detection method embodiments of each UPS mentioned above can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium, etc.

The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application 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 make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims (10)

1. A UPS bypass backflow detection method, comprising: When receiving the target detection signal, controlling the target parameter of the inverter output of the UPS to change according to a preset trend, the target detection signal is used to indicate that bypass backfeed detection is performed on the UPS; Detecting whether a change trend of a target parameter of a bypass input of the UPS is the same as the preset trend; If they are the same, it is determined that bypass backfeed occurs in the UPS. 2. The bypass backfeed detection method of UPS according to claim 1, characterized in that the target parameter for controlling the inverter output of the UPS changes according to a preset trend, comprising: Within a preset time period, the target parameter of the inverter output is controlled to increase and/or decrease according to a preset step size within a first preset fluctuation range. 3. The UPS bypass backfeed detection method according to claim 2, wherein the step of detecting whether a change trend of a target parameter of the UPS bypass input is the same as the preset trend comprises: 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, it is determined that the change trend of the target parameter of the bypass input of the UPS is the same as the preset trend. 4. The bypass backfeed detection method of UPS according to claim 1, wherein the target parameter for controlling the inverter output of the UPS changes according to a preset trend, including: Within a preset time period, the target parameter of the inverter output is controlled to change to a target value within a second preset fluctuation range; Correspondingly, the detecting whether the change trend of the target parameter of the bypass input of the UPS is the same as the preset trend includes: Obtaining a change value of a target parameter of the bypass input within a preset time period; If the change value is the same as the target value, it is determined that the change trend of the target parameter of the bypass input of the UPS is the same as the preset trend. 5. The bypass backfeed detection method for UPS according to any one of claims 1 to 4, characterized in that the target parameter includes voltage and/or frequency. 6. The bypass backflow detection method of UPS according to claim 1, characterized in that it also includes: When it is determined that bypass backfeed occurs in the UPS, a bypass switch of the UPS is controlled to trip. 7. A bypass backflow detection device for UPS, comprising: A parameter control module, used to control the target parameter of the inverter output of the UPS to change according to a preset trend when receiving a target detection signal, the target detection signal being used to indicate that bypass backfeed detection is performed on the UPS; A first judgment module, used to detect whether a change trend of a target parameter of a bypass input of the UPS is the same as the preset trend; The second judgment module is used to determine that bypass backfeed occurs in the UPS if the two conditions are the same. 8. A controller comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, wherein the processor implements the steps of the bypass backfeed detection method of a UPS as described in any one of claims 1 to 6 when executing the computer program. 9. A UPS, comprising the controller according to claim 8. 10. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the steps of the bypass backfeed detection method for a UPS as described in any one of claims 1 to 6.