Dual-power automatic change-over switch and control method thereof

Abstract

The invention provides a dual-power automatic change-over switch and a control method thereof. According to the dual-power-supply automatic change-over switch, the cut-off module is arranged, so that when the voltage of the control module goes wrong, connection between the channel switching module and the load can be directly cut off, namely, a channel for connecting the first power supply and the load and a channel for connecting the second power supply and the load are cut off; according to the application, the switching of the load between the two power supplies can be realized through the control module, and the disconnection of the channel switching module and the load can be directly realized through the cutoff module, so that the damage of load side equipment caused by incapability of working due to abnormal voltage of the control module is prevented.

Description

Technical Field

[0001] This application relates to the technical field of voltage electrical appliances, and particularly to a dual-power automatic transfer switch and its control method. Background Art

[0002] An automatic transfer switch electrical appliance is an automatic transfer electrical appliance used for switching between two load power sources. When an overvoltage, undervoltage, loss of voltage, or open phase occurs in one load power source, the automatic transfer switch electrical appliance will issue a transfer instruction to switch the load power supply to the other load power source. The power supply switching is mainly achieved by the control module in the automatic transfer switch electrical appliance issuing a transfer instruction, and the actuator performs the power conversion action according to the transfer instruction. However, when facing abnormal voltage in the control module, the traditional automatic transfer switch electrical appliance cannot automatically cut off the connection between the abnormal power source and the load, which may cause damage to the equipment on the load side. Summary of the Invention

[0003] In view of this, this application provides a dual-power automatic transfer switch and its control method to improve the problem that the dual-power automatic transfer switch cannot automatically cut off the connection between the abnormal power source and the load when facing abnormal voltage in the control module.

[0004] The technical solution adopted by this application to solve the above technical problems is as follows:

[0005] In a first aspect, an embodiment of this application provides a dual-power automatic transfer switch, including:

[0006] A channel switching module, which is provided with a switchable first channel and a second channel. The first channel is used for electrically connecting the load to the first power source, and the second channel is used for electrically connecting the load to the second power source;

[0007] A control module, which is electrically connected to the channel switching module, the first power source, and the second power source, and is used for collecting voltage data of the first power source and the second power source, and outputting a first control signal according to the voltage data;

[0008] A cut-off module, which is connected to the power supply taking of the control module, and controls the disconnection of the channel where the cut-off module is located according to the voltage data of the power supply taking phase of the control module; and

[0009] An execution module, which is electrically connected to the channel switching module and the control module, and the execution module is used for: receiving the first control signal, and performing the switching or double disconnection of the first channel and the second channel according to the first control signal;

[0010] Wherein, the voltage data of the first power source is the first voltage, the voltage data of the second power source is the second voltage, and the voltage data of the power supply taking phase of the control module is the third voltage.

[0011] In some embodiments of the present application, the channel switching module includes a first breaking mechanism and a second breaking mechanism. The first breaking mechanism is used for electrically connecting with the first power supply and the control module, and the second breaking mechanism is used for electrically connecting with both the second power supply and the control module;

[0012] According to the received first control signal, the execution module controls one of the first breaking mechanism and the second breaking mechanism to disconnect and the other to connect, so as to switch the first channel and the second channel.

[0013] In some embodiments of the present application, the channel switching module includes a first breaking mechanism and a second breaking mechanism. The first breaking mechanism is used for electrically connecting with the first power supply and the control module, and the second breaking mechanism is used for electrically connecting with both the second power supply and the control module;

[0014] According to the received first control signal, the execution module controls the first breaking mechanism and the second breaking mechanism to perform double disconnection, so that both the first channel and the second channel are in a disconnected state.

[0015] In some embodiments of the present application, the first power supply is electrically connected to the load through the first breaking mechanism, the second power supply is electrically connected to the load through the second breaking mechanism, and the control module is connected to both the first power supply and the second power supply;

[0016] The third voltage is the CN phase voltage in the first power supply and / or the voltage of the CN phase in the second power supply.

[0017] In some embodiments of the present application, a second control signal is output according to the third voltage to control the disconnection of the channel where the cutting module is located, and the second control signal is generated by the control module or the cutting module.

[0018] In some embodiments of the present application, controlling the disconnection of the channel where the cutting module is located includes maintaining the disconnected states of the first channel and the second channel, or driving the channel where the cutting module is located to perform disconnection.

[0019] Second aspect, an embodiment of the present application provides a control method for a dual-power automatic transfer switch. The dual-power automatic transfer switch includes a control module, a channel switching module, an execution module, and a cut-off module. The channel switching module is provided with a switchable first channel and a second channel. The first channel is used to electrically connect the load to the first power supply, and the second channel is used to electrically connect the load to the second power supply. The cut-off module is connected to the power supply taking phase of the control module, and controls the disconnection of the channel where the cut-off module is located according to the voltage data of the power supply taking phase of the control module. The execution module is electrically connected to the channel switching module and the control module, and is used to execute the switching or double-disconnection of the first channel and the second channel;

[0020] The control method includes:

[0021] Collect the voltage data of the first power supply and the second power supply. The voltage data of the first power supply is the first voltage, the voltage data of the second power supply is the second voltage, and the voltage data of the power supply taking phase of the control module is the third voltage;

[0022] If the third voltage is normal, switch or double-disconnect the first channel and the second channel according to the first voltage and the second voltage;

[0023] Or

[0024] If the third voltage is abnormal, maintain the disconnection state of the first channel and the second channel according to the third voltage, or drive the channel where the cut-off module is located to execute disconnection.

[0025] In some embodiments of the present application, the control module is used to switch the first channel and the second channel when one of the first voltage and the second voltage is outside the first threshold range and the other is within the first threshold range; when both the first voltage and the second voltage are outside the first threshold range and the third voltage is normal at this time, disconnect one of the first channel and the second channel that was originally in the on state, and the other channel remains disconnected, so that both the first channel and the second channel are in the disconnected state.

[0026] In some embodiments of the present application, the channel switching module includes a first circuit breaker mechanism and a second circuit breaker mechanism. The first power supply is electrically connected to the load through the first circuit breaker mechanism, and the second power supply is electrically connected to the load through the second circuit breaker mechanism. The control module is connected to both the first power supply and the second power supply; the voltage data in the first power supply is divided into the power supply taking phase voltage or the non-power supply taking phase voltage, the voltage data in the second power supply is divided into the power supply taking phase voltage or the non-power supply taking phase voltage, and the power supply taking phase voltage of the first power supply or the second power supply is the third voltage;

[0027] The step of switching or bisecting the first channel and the second channel according to the first voltage and the second voltage includes:

[0028] When the first voltage is outside the first threshold range and the second voltage is within the first threshold range, determine whether the current load is connected to the first power supply;

[0029] If so, the execution module controls the first channel to be disconnected and the second channel to be connected, so that the load is switched from being connected to the first power supply to being connected to the second power supply.

[0030] In some embodiments of the present application, the channel switching module includes a first breaking mechanism and a second breaking mechanism. The first power supply is electrically connected to the load through the first breaking mechanism, the second power supply is electrically connected to the load through the second breaking mechanism, and the control module is connected to both the first power supply and the second power supply; the voltage data in the first power supply is divided into a power-taking phase voltage or a non-power-taking phase voltage, the voltage data in the second power supply is divided into a power-taking phase voltage or a non-power-taking phase voltage, and the power-taking phase voltage of the first power supply or the second power supply is the third voltage;

[0031] The step of switching or bisecting the first channel and the second channel according to the first voltage and the second voltage includes:

[0032] When the first voltage is within the first threshold range and the second voltage is outside the first threshold range, determine whether the current load is connected to the second power supply;

[0033] If so, the execution module controls the second channel to be disconnected and the first channel to be connected, so that the load is switched from being connected to the second power supply to being connected to the first power supply.

[0034] In some embodiments of the present application, the channel switching module includes a first breaking mechanism and a second breaking mechanism. The first power supply is electrically connected to the load through the first breaking mechanism, the second power supply is electrically connected to the load through the second breaking mechanism, and the control module is connected to both the first power supply and the second power supply; the voltage data in the first power supply is divided into a power-taking phase voltage or a non-power-taking phase voltage, the voltage data in the second power supply is divided into a power-taking phase voltage or a non-power-taking phase voltage, and the power-taking phase voltage of the first power supply or the second power supply is the third voltage;

[0035] The step of switching or bisecting the first channel and the second channel according to the first voltage and the second voltage includes:

[0036] When both the first voltage and the second voltage are outside the first threshold range, the control module determines that the non-powered-phase voltages of the first power supply and the second power supply are both in an abnormal state, and any one of the powered-phase voltages of the first power supply and the powered-phase voltage of the second power supply is in a normal state;

[0037] Determine whether the current load is connected to the first power supply or the second power supply;

[0038] If the current load is connected to the first power supply or the second power supply, control the first circuit breaker mechanism and the second circuit breaker mechanism to be in the open state, so that the load is disconnected from both the first power supply and the second power supply.

[0039] In some embodiments of the present application, after the step of if the current load is connected to the first power supply or the second power supply, controlling the first circuit breaker mechanism and the second circuit breaker mechanism to be in the open state, so that the load is disconnected from both the first power supply and the second power supply, further includes:

[0040] Continuously monitor the voltage states of the first power supply and the second power supply;

[0041] If the voltage states of the first power supply and / or the second power supply return to normal, connect a power supply with normal voltage restored to the load through the channel switching module.

[0042] In some embodiments of the present application, the channel switching module includes a first circuit breaker mechanism and a second circuit breaker mechanism. The first power supply is electrically connected to the load through the first circuit breaker mechanism, the second power supply is electrically connected to the load through the second circuit breaker mechanism, and the control module is connected to both the first power supply and the second power supply; the voltage data in the first power supply is divided into powered-phase voltage or non-powered-phase voltage, the voltage data in the second power supply is divided into powered-phase voltage or non-powered-phase voltage, and the powered-phase voltage of the first power supply or the second power supply is the third voltage;

[0043] The step of maintaining the disconnected states of the first channel and the second channel according to the third voltage, or driving the channel where the cut-off module is located to execute disconnection, includes:

[0044] When the third voltage is outside the second threshold range, determine that the powered-phase voltage of the first power supply and / or the powered-phase voltage of the second power supply is in an abnormal state;

[0045] Control the breaking mechanism in the cut-off module to drive the first circuit breaker mechanism and / or the second circuit breaker mechanism to disconnect, so that the first power supply and the second power supply are both in a disconnected state from the load.

[0046] In some embodiments of the present application, after the step in which the breaking mechanism in the control cutting-off module drives the first breaking mechanism and / or the second breaking mechanism to be disconnected, so that the first power supply, the second power supply and the load are all in a disconnected state, the following steps are further included:

[0047] When an abnormal third voltage state returns to a normal state, it is judged whether the disconnection action of the cutting-off module is triggered by an abnormality in the power-taking phase of the first power supply and / or the power-taking phase of the second power supply;

[0048] If so, control the execution module to act, so that the channel switching module is switched to the double-breaking state;

[0049] Continuously monitor the voltage states of the first power supply and the second power supply. If the voltage states of the first power supply and / or the second power supply return to normal, connect one of the power supplies with normal voltage restoration to the load through the channel switching module.

[0050] If not, it is judged that the fault is not caused by an abnormality in the power-taking phase, and a fault warning is issued, and the process of connecting the channel switching module to the load is terminated until the fault is cleared.

[0051] In summary, due to the adoption of the above technical solution, the present application has at least the following beneficial effects:

[0052] The embodiment of the present application provides a dual-power automatic transfer switch and its control method. By setting a cutting-off module, when there is a problem with the voltage of the power-taking phase of the control module, the cutting-off module can be used to disconnect the connection between the channel switching module and the load, that is, disconnect the channel connecting the first power supply and the load or the channel connecting the second power supply and the load. Compared with the traditional dual-power automatic transfer switch, which can only realize the switching of the load between two power supplies through the control module, in addition to being able to realize the switching of the load between two power supplies through the control module, the present application can also control the disconnection of the channel switching module and the load through the cutting-off module, so as to prevent the situation that the voltage of the power-taking phase of the control module is abnormal and cannot work, resulting in the channel switching module being unable to switch channels. In other words, by setting a cutting-off module and cooperating with the control module, the function of protecting the load side can be realized when any phase voltage is abnormal. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a schematic structural diagram of a dual-power automatic transfer switch provided by an embodiment of the present application;

[0054] Figure 2 is Figure 1 The internal structural diagram of the provided dual-power automatic transfer switch;

[0055] Figure 3A flowchart of a method for controlling a dual - power automatic transfer switch provided by an embodiment of the present application;

[0056] Figure 4 A flowchart of another method for controlling a dual - power automatic transfer switch provided by an embodiment of the present application

[0057] Figure 5 A flowchart of yet another method for controlling a dual - power automatic transfer switch provided by an embodiment of the present application;

[0058] Figure 6 A schematic flowchart of a method for controlling a dual - power automatic transfer switch provided by an embodiment of the present application.

[0059] Explanation of reference numerals:

[0060] 1. Channel switching module; 11. First breaking mechanism; 12. Second breaking mechanism; 2. Control module; 3. Cutting - off module; 4. Execution module. Detailed implementation manners

[0061] Next, the technical solutions in the embodiments of the present application will be described with reference to the accompanying drawings in the embodiments of the present application.

[0062] In the description of the present application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0063] In the present application, the term "exemplary" is used to mean "serving as an example, illustration, or explanation". Any embodiment described as "exemplary" in the present application is not necessarily to be construed as more preferred or more advantageous than other embodiments.

[0064] Please refer to Figure 1 and Figure 2, embodiments of the present application provide a dual - power automatic transfer switch, including a channel switching module 1, a control module 2, a cut - off module 3, and an execution module 4. Among them, the channel switching module 1 is provided with a switchable first channel and second channel. The first channel is used to electrically connect the load to the first power supply, and the second channel is used to electrically connect the load to the second power supply. The control module 2 is electrically connected to the channel switching module 1, the first power supply, and the second power supply, and is used to collect the voltage data of the first power supply and the second power supply, and output a first control signal according to the voltage data. The cut - off module 3 is connected to the power - taking phase of the control module 2, and controls the disconnection of the channel where the cut - off module 3 is located according to the voltage data of the power - taking phase. The execution module 4 is electrically connected to the channel switching module 1 and the control module 2. The execution module 4 is used to receive the first control signal and perform the switching or double - breaking of the first channel and the second channel according to the first control signal.

[0065] It should be noted that the voltage data of the first power supply is the first voltage, the voltage data of the second power supply is the second voltage, and the voltage data of the power - taking phase of the control module 2 is the third voltage. The power - taking phase refers to the phase used to supply power to the control module 2. In this embodiment, the third voltage represents the voltage data of the power - taking phase for supplying power to the control module 2. The cut - off module 3 can be connected to the first power supply or the second power supply, or both connected to the first power supply and the second power supply, as long as the power supply connected to the cut - off module 3 is the same as that of the control module 2, so as to ensure that the cut - off module 3 can act according to the third voltage data taken by the control module 2. In addition, in some embodiments, the cut - off module 3 includes a voltage detection circuit and a breaking mechanism, which uses the voltage detection circuit to detect the voltage situation of the power taken by the control module 2, and the breaking mechanism is used to realize the disconnection of the channel. In other embodiments, the cut - off module 3 only includes a breaking mechanism. For the detection of voltage data, the voltage data detected by the control module 2 can be directly used to drive the breaking mechanism to act.

[0066] The channel switching module 1 is electrically connected to both the first power supply and the second power supply. The main function of this module is to switch between the channel connecting the first power supply and the load and the channel connecting the second power supply and the load. Its implementation principle is that through the internal electrical connection structure and corresponding switch elements, the connection path of the circuit can be changed, so as to realize the switching of the connection channel between the power supply and the load. For example, the channel switching module 1 can include components such as electromagnetic relays or solid - state relays. When the control module 2 outputs the first control signal to the execution module 4 according to the voltage, the execution module 4 outputs a channel switching signal according to the first control signal. After receiving the channel switching signal, these components can change the on - state of their contacts, switching the load from the first power supply to the second power supply, or vice versa. In subsequent embodiments, the channel switching module 1 will be introduced in detail and will not be elaborated here.

[0067] Exemplarily, under normal circumstances, the dual-power automatic transfer switch can flexibly select to use the first power source or the second power source to supply power to the load according to needs. For example, in some application scenarios, the first power source can be the main power supply, and the second power source is the backup power supply. When the main power supply is normal, the channel switching module 1 connects the load to the first power source to ensure the normal operation of the load; when there is a problem with the main power supply, it can be switched to the second power source to supply power to the load through subsequent control logic. The priority of the main power supply can be higher than that of the backup power supply, that is, when the main power supply resumes normal operation, the channel will be preferentially switched to connect the load to the main power supply.

[0068] The control module 2 is electrically connected to the channel switching module 1, the first power source, and the second power source. It is responsible for collecting the voltage data of the first power source and the second power source, which is achieved through electronic components such as voltage sensors. The control module 2 continuously monitors the voltage conditions of the first power source and the second power source to obtain parameter information such as their voltage amplitudes and frequencies. Based on the collected voltage data, the control module 2 outputs a first control signal according to a predetermined logic. The execution module 4 outputs a channel switching signal to the channel switching module 1 according to the received first control signal, and the channel switching module 1 performs the channel switching operation according to the channel switching signal. When it is detected that the voltage data of the first power source is within the normal range, the control module 2 will keep the channel between the channel switching module 1, the first power source, and the load in a connected state; when the first power source has overvoltage, undervoltage, loss of voltage, or phase break conditions, the control module 2 will start the corresponding program to prepare to control the execution module 4 to operate on the channel switching module 1. For example, a microprocessor is provided in the control module 2, and this microprocessor analyzes and processes the collected voltage data through a pre-written program. When it is detected that the voltage of the first power source is lower than the set threshold (such as 85% of the rated voltage) or there is a missing phase voltage, etc., it is determined that the first power source is abnormal, and thus preparations are made for the channel switching operation; conversely, when the first power source resumes normal operation and has been switched to the second power source before, the control module 2 can trigger the execution module 4 to switch the channel back to the first power source.

[0069] The cut-off module 3 is electrically connected to at least one of the first power supply and the second power supply, or is connected to other external power supplies. In this embodiment, it is necessary to connect the cut-off module 3 and the control module 2 to the same power supply, for detecting the voltage data of the control module 2, and judging whether the current voltage of the control module 2 is normal according to the voltage data, that is, whether the third voltage is normal. If it is not normal, the connection between the power supply and the load can be directly disconnected or the disconnected state between the power supply and the load can be maintained. In a specific implementation, the cut-off module 3 may include one or more voltage detection circuits and a breaking mechanism. Exemplarily, the cut-off module 3 is connected to the first power supply, and its voltage detection circuit will monitor the voltage data of the power taken by the control module 2 in real time. Once the voltage data of the power-taking phase of the control module 2 is detected to be abnormal, it indicates that there may be a problem with the power supply, and at this time, the control module 2 cannot work properly. When this situation occurs, the breaking mechanism in the cut-off module 3 will act to disconnect the connection channel between the first power supply and the load, thereby preventing the load from continuing to be connected to the abnormal power supply and preventing the damage of the load-side equipment caused by the abnormal power supply.

[0070] The technical solution provided by this application can, by setting the cut-off module 3, disconnect the connection between the channel switching module 1 and the load when there is a problem with the voltage of the control module 2, that is, disconnect the channel connecting the first power supply and the load and the channel connecting the second power supply and the load. Compared with the traditional dual-power automatic transfer switch that can only realize the switching of the load between two power supplies through the control module 2, this application can not only realize the switching of the load between two power supplies through the control module 2, but also realize the disconnection between the channel switching module 1 and the load through the cut-off module 3, so as to prevent the situation that the channel switching module 1 cannot switch the channel due to the abnormal voltage of the control module 2 and the control module 2 cannot work. In other words, by setting the cut-off module 3 and cooperating with the control module 2, the cut-off module 3 can realize the function of protecting the load side when any phase voltage is abnormal.

[0071] In some embodiments, the channel switching module 1 includes a first breaking mechanism 11 and a second breaking mechanism 12. The first breaking mechanism 11 is used for electrically connecting to the first power supply and the control module 2, and the second breaking mechanism 12 is used for electrically connecting to the second power supply and the control module 2. The execution module 4 controls one of the first breaking mechanism 11 and the second breaking mechanism 12 to disconnect and the other to connect according to the received first control signal, so as to switch between the first channel and the second channel. Exemplarily, the first breaking mechanism 11 and the second breaking mechanism 12 can be implemented by electrical components such as circuit breakers or contactors. For example, the first breaking mechanism 11 can be constructed by a circuit breaker, its input end is connected to the first power supply, its output end is connected to the load, and it also receives the control signal from the control module 2. The second breaking mechanism 12 also has a similar structure, is connected to the second power supply and the load, and is controlled by the control module 2.

[0072] The control module 2 outputs a first control signal according to the voltage data of the first power supply and the second power supply, and controls the execution module 4 to control one of the first circuit breaker mechanism 11 and the second circuit breaker mechanism 12 to disconnect and the other to connect, or to perform double disconnection, so that both the first channel and the second channel are in a disconnected state. The voltage data of the first power supply is the first voltage, the power supply data of the second power supply is the second voltage, and the voltage data of the power supply-taking phase of the control module 2 is the third voltage.

[0073] In some embodiments, when both the first voltage and the second voltage are outside the first threshold range, the control module 2 sends a first control signal to the execution module 4, and the execution module 4 performs double disconnection according to the first control signal, so that both the first channel and the second channel are in a disconnected state. When the control module 2 monitors the voltage data of the first power supply and the second power supply, it makes a judgment based on a preset algorithm and logic. Suppose that at a certain moment, the control module 2 detects that the first voltage is abnormal, such as the first voltage is outside the first threshold range and the second voltage is within the first threshold range. The control module 2 will send a corresponding first control signal to the execution module 4. After receiving the signal, the execution module 4 will trip the first circuit breaker mechanism 11 and close the second circuit breaker mechanism 12, so that the first circuit breaker mechanism 11 disconnects the connection channel between the first power supply and the load, and the second circuit breaker mechanism 12 connects the connection channel between the second power supply and the load. In this way, the load can be isolated from the abnormal first power supply and switched to the normal second power supply, preventing the load from being affected by the abnormal voltage while still being able to maintain the normal voltage input of the load. In addition, when the control module 2 detects that both the first voltage of the first power supply and the second voltage of the second power supply are abnormal, such as the first voltage is outside the first threshold range and the second voltage is outside the first threshold range, the control module 2 will send a corresponding first control signal to the execution module 4. After receiving the signal, the execution module 4 will perform a double disconnection action on the first circuit breaker mechanism 11 and the second circuit breaker mechanism 12, so that the first circuit breaker mechanism 11 disconnects the connection channel between the first power supply and the load, and the second circuit breaker mechanism 12 disconnects the connection channel between the second power supply and the load.

[0074] In some embodiments, the first power supply is electrically connected to the load through the first disconnection mechanism 11, the second power supply is electrically connected to the load through the second disconnection mechanism 12, and the control module 2 is electrically connected to both the first power supply and the second power supply. It should be noted that the power supply for the control module 2 can be taken from the first power supply, or from the second power supply, or from both the first power supply and the second power supply. The power supply for the control module 2 can be selected and switched through a built-in selection circuit. Exemplarily, if the first disconnection mechanism 11 or the second disconnection mechanism 12 is a four-phase disconnection mechanism, it includes a first phase A phase, a second phase B phase, a third phase C phase, and a fourth phase N phase. The first power supply is electrically connected to the load through the first disconnection mechanism 11, the second power supply is electrically connected to the load through the second disconnection mechanism 12, the control module 2 is electrically connected to both the first power supply and the second power supply, and the power supply for the control module 2 can be the AN phase or the BN phase or the CN phase of the first power supply, or the AN phase or the BN phase or the CN phase of the second power supply, or the AN phase of the first power supply and the AN phase of the second power supply.

[0075] It should be noted that the third voltage is the power supply voltage in the first power supply and / or the power supply voltage in the second power supply, such as the CN phase voltage. At this time, the voltages of the other phases can be called non-power supply phase voltages. When the data of the third voltage is outside the second threshold range, it indicates that the current third voltage is abnormal, and the control module 2 cannot work properly at this time. The disconnection module 3 will directly drive the channel where the disconnection module 3 is located to disconnect according to the third voltage. Moreover, for the first threshold range and the second threshold range, the same voltage threshold range can be adopted, or different voltage threshold ranges can be adopted, which is determined according to the actual situation.

[0076] Please refer to Figure 1 and Figure 2, in some embodiments, the cutting module 3 is disposed outside the channel switching module 1. The channel switching module 1 has a first channel and a second channel. Two cutting modules 3 may also be provided, one of the cutting modules 3 being located outside the first channel and the other cutting module 3 being located outside the second channel. In other embodiments, the cutting module 3 may also be disposed inside the channel switching module 1. In still other embodiments, the cutting module 3 may be integrated into the control module 2, thereby omitting the installation components required for a separate cutting module 3. By integrating the cutting module 3 inside the control module 2, modularization and integration of the dual-power automatic transfer switch can be achieved. Except that the cutting module 3 in this embodiment is integrated into the control module 2, the remaining structure of the dual-power automatic transfer switch is the same as that in the foregoing embodiment and will not be described in detail. It should be noted that the foregoing cutting module 3 may be disposed inside the channel switching module 1, may be integrated into the control module 2, or may be disposed outside the channel. This is mainly for the circuit part in the cutting module 3, that is, the circuit part in the cutting module 3 may be disposed outside the first channel and the second channel, may also be disposed inside the channel switching module 1, or may be integrated into the control module 2. For the tripping mechanical part in the cutting module 3, in any of the foregoing cases, it is disposed inside the channel switching module 1 to achieve the cutting of the channel.

[0077] It should also be noted that, please refer to Figure 3 , when the circuit structure of the circuit part of the cutting module 3 and the control module 2 is an independent circuit structure, the third voltage of the power-taking phase of the control module 2 is obtained by using components such as a voltage sensor that can detect and collect the voltage. Please refer to Figure 4 , when the circuit part of the cutting module 3 is integrated into the control module 2, for obtaining the third voltage, there is no need to externally collect it with components such as a voltage sensor anymore, but the third voltage can be directly obtained through the control module 2.

[0078] Please refer to Figure 1 , Figure 3 and Figure 6 , an embodiment of the present application further provides a control method for a dual-power automatic transfer switch. The dual-power automatic transfer switch includes a control module 2, a channel switching module 1, and a cutting module 3. The channel switching module 1 is provided with a switchable first channel and a second channel. The first channel is used to electrically connect the load to the first power supply, and the second channel is used to electrically connect the load to the second power supply. The cutting module 3 is connected to the power-taking phase of the control module 2, and controls the disconnection of the channel where the cutting module is located according to the voltage data of the power-taking phase of the control module 2. The execution module is electrically connected to the channel switching module and the control module, and is used to execute the switching or double-breaking of the first channel and the second channel. The control method includes:

[0079] S1. Collect the voltage data of the first power supply and the second power supply. The voltage data of the first power supply is the first voltage, the voltage data of the second power supply is the second voltage, and the voltage data of the power supply phase taken by the control module is the third voltage;

[0080] S2. If the third voltage is normal, switch or double-divide the first channel and the second channel according to the first voltage and the second voltage; or, if the third voltage is abnormal, maintain the off state of the first channel and the second channel according to the third voltage, or drive the channel where the cut-off module is located to execute disconnection.

[0081] First, use the control module 2 to collect the voltage data of the first power supply and the second power supply connected to the dual-power automatic transfer switch. The control module 2 is respectively connected to the first power supply and the second power supply through built-in voltage sensors, and these voltage sensors can accurately measure information such as the voltage amplitude, frequency, and phase of the power supply. For example, in an industrial power supply system, the control module 2 can continuously monitor the voltages of the first power supply and the second power supply. The sensors will sample the voltage at a certain sampling frequency (such as 100 times per second) and transmit these voltage data to the control module 2 for processing.

[0082] Both the first power supply and the second power supply are electrically connected to the channel switching module 1 and the control module 2, which can ensure that the control module 2 can real-time master the state information of the power supply. At the same time, at least one of the first power supply and the second power supply is electrically connected to the cut-off module 3 to trigger a disconnection action when needed.

[0083] The control module 2 will analyze the collected voltage data according to the preset logic. When the first power supply is normal, the control module 2 will maintain the channel between the first power supply and the load in the on state, so that the load can normally obtain electrical energy from the first power supply. In the control module 2, the power supply can be judged to be normal by comparing the voltage amplitude with the preset normal voltage range (for example, ±10% of the rated voltage). If the voltage of the first power supply exceeds this range, it is determined to be abnormal. Once an abnormality is detected, different control actions are taken according to different abnormal situations. For example, when the voltage of the first power supply shows a downward trend and approaches the under-voltage state, and this situation lasts for a period of time (such as 0.5 seconds), the control module 2 will output a first control signal to the execution module 4, and the execution module 4 will control the channel switching of the channel switching module 1 according to the first control signal.

[0084] On the contrary, when the power supply state returns to normal, the control module 2 can judge according to the logic whether to reconnect the previously disconnected channel. If the first power supply returns to the normal voltage range, the control module 2 can connect the channel between the first power supply and the load through the execution module 4, so that the load can obtain electrical energy from the first power supply again.

[0085] The technical solution provided by this application can disconnect the connection between the channel switching module 1 and the load when there is a problem with the power supply voltage of the control module 2 by setting the cut-off module 3, that is, disconnect the channel connecting the first power supply originally in the on state and the load or the channel connecting the second power supply originally in the on state and the load, so that both the first power supply and the second power supply are in a disconnected state from the load. Compared with the traditional dual-power automatic transfer switch, which can only switch the load between two power supplies through the control module 2, in addition to being able to switch the load between two power supplies through the control module 2, this application can also disconnect the channel switching module 1 and the load through the cut-off module 3 to prevent the voltage of the control module 2 from being abnormal and unable to work, resulting in the situation where the channel switching module 1 cannot switch channels. In addition, the control module 2 can not only switch channels but also disconnect channels to cope with the situation when both power supplies have problems. In other words, by setting the cut-off module 3 and cooperating with the control module 2, the function of protecting the load side can be realized when any phase voltage is abnormal.

[0086] In some embodiments, the control module 2 is used to switch the first channel and the second channel when one of the first voltage and the second voltage is outside the first threshold range and the other is within the first threshold range; when both the first voltage and the second voltage are outside the first threshold range, disconnect one of the first channel and the second channel that was originally in the on state, and keep the other channel disconnected, so that the control module can not only switch channels but also achieve double disconnection of channels to cope with the situation when both power supplies have problems. It should be noted that whether it is to achieve double disconnection of channels or channel switching, it must be based on the normal third voltage. Otherwise, the control module 2 cannot work properly and cannot output the signal of double disconnection or channel switching.

[0087] Further, please refer to Figure 2 , the channel switching module includes a first breaking mechanism and a second breaking mechanism. The first power supply is electrically connected to the load through the first breaking mechanism, and the second power supply is electrically connected to the load through the second breaking mechanism. The control module is electrically connected to both the first power supply and the second power supply. The voltage data in the first power supply is divided into a power-taking phase voltage or a non-power-taking phase voltage, and the voltage data in the second power supply is divided into a power-taking phase voltage or a non-power-taking phase voltage. The power-taking phase voltage of the first power supply or the second power supply is the third voltage. The steps of switching or double-disconnecting the first channel and the second channel according to the first voltage and the second voltage include:

[0088] When the first voltage is outside the first threshold range and the second voltage is within the first threshold range, the control module determines that the voltage of the non-power-taking phase of the first power supply is in an abnormal state, and the voltage of the power-taking phase of the first power supply and the voltage of the second power supply are both in a normal state;

[0089] Determine whether the current load is connected to the first power supply;

[0090] If so, the execution module controls the first channel to disconnect and the second channel to connect, so that the load switches from being connected to the first power supply to being connected to the second power supply.

[0091] Exemplarily, when the first voltage in the first power supply is outside the first threshold range, the second voltage in the second power supply is within the first threshold range, and the circuit where the first power supply is located is connected to the load, corresponding control actions will be triggered. When judging whether the non-power-taking phase voltage of the first power supply is abnormal, the control module 2 will compare the measured voltage value with the preset normal range. The judgment criterion for voltage abnormality can be: if the amplitude of the first voltage is lower than 85% of the rated voltage, or there is a voltage fluctuation exceeding ±15% of the rated voltage, etc., then it is considered that the phase voltage is in an abnormal state. Once the above abnormal state is detected, the control module 2 will control the execution module 4 to act. During this process, the control module 2 will send a first control signal to the execution module 4 according to the preset program logic. This signal can be a digital signal or an analog signal. For example, a high-level signal can represent an instruction to execute channel switching. After receiving the signal from the control module 2, the execution module 4 will control the channel switching in the channel switching module 1 according to the signal. The disconnection of the first channel here can be achieved through the electromagnetic disconnection mechanism in the first disconnection mechanism 11. When receiving the disconnection signal, the electromagnetic disconnection mechanism will release the mechanical latch, causing the first disconnection mechanism 11 to disconnect the circuit where the first power supply is located. At the same time, the control module 2 will control the channel switching module 1 to connect the second channel. The connection of the second channel here can be achieved by connecting the second disconnection mechanism, thereby connecting the circuit where the second power supply is located. During this process, the control module 2 will send a connection signal to the second disconnection mechanism 12 to turn on the internal switch of the second disconnection mechanism 12, thereby realizing the switching of the load from the first power supply to the second power supply. This action can be completed by controlling switch elements such as relays or contactors to ensure that the load obtains electrical energy from the second power supply.

[0092] Further, the step of switching or double-splitting the first channel and the second channel according to the first voltage and the second voltage further includes:

[0093] When the first voltage is within the first threshold range and the second voltage is outside the first threshold range, the control module determines that the voltage of the non-power-taking phase of the second power supply is in an abnormal state, and the voltage of the power-taking phase of the second power supply and the first power supply are both in a normal state;

[0094] Determine whether the current load is connected to the second power supply;

[0095] If so, the execution module controls the second channel to disconnect and the first channel to connect, so that the load switches from being connected to the second power supply to being connected to the first power supply.

[0096] Exemplarily, the control module 2 continuously analyzes the collected voltage data and compares it with a preset first threshold range. When the non-power-taking phase voltage in the second power supply is in an abnormal state, while the power-taking phase of the second power supply and the voltage states of the first power supply are both in a normal state, and the circuit where the second power supply is located is connected to a load, the control module 2 issues a control instruction to the execution module 4 based on its built-in algorithms and logical judgments. During this process, the control module 2 transmits the control instruction to the execution module 4 according to a predetermined communication protocol (such as a digital signal protocol or an analog signal protocol). After receiving the instruction, the execution module 4 disconnects the second channel in the channel switching module 1 to disconnect the circuit where the second power supply is located. This disconnection operation can be achieved by the execution module 4 triggering the breaking mechanism in the second breaking mechanism 12, and this breaking mechanism can be an electromagnetic disconnector. When receiving the disconnection signal from the execution module 4, the electromagnetic disconnector operates to open the contacts of the second breaking mechanism 12, thereby cutting off the connection between the second power supply and the load.

[0097] Subsequently, the control module 2 controls the channel switching module 1 to connect to the first channel to connect the circuit where the first power supply is located. The control module 2 sends a connection signal to the first breaking mechanism 11, and this signal can be achieved by the connection of a control switch element (such as a relay or a solid-state switch), enabling the first power supply to provide electrical energy to the load. This series of operations ensures that the load can obtain electrical energy from the normal first power supply and is not affected by the abnormal second power supply.

[0098] Through the precise monitoring of different power supply phases and corresponding control actions, this control method improves the fault tolerance of the entire power supply system. When there are abnormalities in some phases of the second power supply, the system can automatically switch to the first power supply, avoiding system failures caused by partial phase abnormalities and enhancing the reliability of the power supply system.

[0099] In some embodiments, please refer to Figure 5 , the step of switching or double-breaking the first channel and the second channel according to the first voltage and the second voltage further includes:

[0100] When both the first voltage and the second voltage are outside the first threshold range, the control module determines that the voltages of the non-power-taking phases of the first power supply and the second power supply are both in abnormal states, and any one of the voltages of the power-taking phase of the first power supply and the power-taking phase of the second power supply is in a normal state;

[0101] Judge whether the current load is connected to the first power supply or the second power supply;

[0102] If the current load is connected to the first power supply or the second power supply, control the first breaking mechanism and the second breaking mechanism to be in the open state, so as to disconnect the load from both the first power supply and the second power supply;

[0103] If neither the first power supply nor the second power supply is connected to the load, the first breaking mechanism and the second breaking mechanism do not operate.

[0104] Exemplarily, the control module 2 continuously monitors the voltage states of the first power supply and the second power supply. Through a high-precision voltage detection circuit, the control module 2 can accurately measure the voltage of each phase in the first power supply and the second power supply. This voltage detection circuit can adopt a combination of precision resistor voltage division and an analog-to-digital conversion chip to convert the voltage data of different phases into digital signals for the control module 2 to process. For example, in an industrial power supply system, the control module 2 periodically (such as every 100 milliseconds) acquires the voltage data of the first power supply and the second power supply, including the voltage values of the first phase, the second phase, and the third phase. When it is detected that at least one of the voltages of the first phase and the second phase in the first power supply and at least one of the voltages of the first phase and the second phase in the second power supply are in an abnormal state, while the voltages of the third phase in the first power supply and the third phase in the second power supply are in a normal state, the control module 2 will further determine whether at least one of the circuits where the first power supply is located and the circuit where the second power supply is located is connected to the load. For the judgment of abnormal voltage, the control module 2 compares the measured voltage with a pre-set normal voltage range. Here, the set normal voltage range can be within ±10% of the rated voltage. If it exceeds this range, the voltage of this phase is considered to be in an abnormal state.

[0105] If the judgment result shows that neither the circuits where the first power supply and the second power supply are located are connected to the load, the control module 2 will continue to continuously monitor the voltage states of the first power supply and the second power supply, and at this time, the execution module 4 does not perform any actions. Because in this case, even if there are abnormal voltages in some phases of the power supply, since the load is not connected, it will not affect the load temporarily, and there is no need to perform channel switching or disconnection operations, which can avoid unnecessary actions and reduce the energy consumption of the system and the wear of components.

[0106] If one of the first power supply and the second power supply is connected to the load, the control module 2 will control the execution module 4 to act to disconnect the channel connected to the load. Exemplarily, if the circuit where the first power supply is located is connected to the load, the control module 2 will send a tripping signal to the execution module 4. This tripping signal can be a specific level signal or a digital coding signal. After receiving this signal, the execution module 4 will trigger the corresponding tripping operation.

[0107] Further, please refer to Figure 5 After the step of, if the current load is connected to the first power supply or the second power supply, controlling both the first breaking mechanism and the second breaking mechanism to be in the tripping state so that the load is disconnected from both the first power supply and the second power supply, further includes:

[0108] Continuously monitor the voltage status of the first power supply and the second power supply to grasp the dynamic changes of the power supply, so that corresponding recovery operations can be taken in a timely manner when the power supply status returns to normal.

[0109] If the voltage status of the first power supply and / or the second power supply returns to normal, a power supply with normal voltage recovery is connected to the load through the channel switching module.

[0110] Exemplarily, when the voltage of the first power supply returns to normal, the control module 2 will send a corresponding control signal to the execution module 4 to turn on the channel where the first power supply is located. After receiving the signal, the execution module 4 will trigger the corresponding switch or contactor to act. For the operation of the execution module 4, it can realize the connection of the channel by controlling components such as relays or solid-state switches. For example, when receiving the signal from the control module 2, if a relay is used, the coil of the relay will be energized, causing the contacts of the relay to close, thereby connecting the channel where the first power supply is located to the load and restoring the power supply to the load. During the operation, the control module 2 will ensure the accuracy and safety of the operation, and avoid current impact caused by sudden connection actions, which can be achieved by controlling the connection speed or adopting a soft-start mechanism. In one example, the control module 2 can delay the control of the execution module 4 to act to avoid current impact caused by sudden connection actions.

[0111] In some embodiments, please refer to Figure 2 , maintain the off state of the first channel and the second channel according to the third voltage, or drive the channel where the cut-off module 3 is located to execute disconnection.

[0112] Exemplarily, when the third voltage in the first power supply and / or the third voltage in the second power supply is in an abnormal state, the cut-off module 3 drives the first breaking mechanism 11 and / or the second breaking mechanism 12 to disconnect, so as to disconnect the circuits connecting the first power supply and the second power supply to the load respectively. For example, if the voltage status of the AN phase and the BN phase of the first power supply is in a normal state, the voltage status of the AN phase and the BN phase of the second power supply is in a normal state, and the CN phases of the first power supply and the second power supply are both in an abnormal state, it means that there is a problem with the CN phase that supplies power to the control module 2, and the control module 2 itself cannot work properly. At this time, the cut-off module 3 can drive the first breaking mechanism 11 and the second breaking mechanism 12 to disconnect, so as to disconnect the circuits connecting the first power supply and the second power supply to the load respectively, achieving the effect of load-side protection for any abnormal phase voltage. Specifically, the judgment of the normal state can be based on a preset voltage range. For example, the voltage within ±5% of the rated voltage is regarded as normal, and the abnormal judgment of the third-phase voltage can be when the voltage exceeds this range or there is voltage fluctuation.

[0113] It should also be noted that there are three situations for the control cut-off module 3 to drive the breaking mechanism to disconnect the first breaking mechanism and / or the second breaking mechanism: The first is that the disconnecting element in the control cut-off module 3 drives the first breaking mechanism to disconnect, while the second breaking mechanism is originally in a disconnected state, or the second breaking mechanism is controlled to be in a disconnected state by the control module 2 before this. The second is that the breaking mechanism in the control cut-off module 3 drives the second breaking mechanism to disconnect, while the first breaking mechanism is originally in a disconnected state, or the first breaking mechanism is controlled to be in a disconnected state by the control module 2 before this. The third is that the disconnecting element in the control cut-off module 3 drives both the first breaking mechanism and the second breaking mechanism to disconnect.

[0114] Once the above conditions are met, the cut-off module 3 will drive the channel where the cut-off module 3 is located to execute disconnection to disconnect the circuits connecting the first power supply and the second power supply to the load respectively.

[0115] Based on its own voltage monitoring result, the cut-off module 3 will directly drive the channel switching module 1 to disconnect, thereby disconnecting the connection between the first power supply and the second power supply and the load, and preventing the abnormal third-phase power supply from affecting the load device.

[0116] When the voltages of the power-taking phases of the first power supply and the second power supply are abnormal while the other phases are normal, the control module 2 cannot work properly due to the abnormal voltages of the power-taking phases, resulting in the channel switching module 1 not being able to be controlled by the control module 2 for switching on and off. Through the action of the cut-off module 3, this control method can directly and quickly cut off the connection between the first power supply and the second power supply and the load without the control module 2 controlling the execution module 4 to act, avoiding the load being affected by the abnormal power supply.

[0117] Exemplarily, when both the first channel and the second channel are in a disconnected state, and the third voltage in the first power supply and / or the third voltage in the second power supply is outside the second threshold range, it is determined that the voltage of the third phase of the first power supply and / or the third phase of the second power supply is in an abnormal state;

[0118] Maintain the disconnected states of the first breaking mechanism and the second breaking mechanism so that both the first power supply and the second power supply and the load are in a disconnected state.

[0119] In some embodiments, the step of maintaining the disconnected states of the first channel and the second channel according to the third voltage, or driving the channel where the cut-off module is located to execute disconnection, includes:

[0120] When the third voltage is outside the second threshold range, it is determined that the voltage of the power-taking phase of the first power supply and / or the voltage of the power-taking phase of the second power supply is in an abnormal state;

[0121] The breaking mechanism in the control cut-off module drives both the first breaking mechanism and / or the second breaking mechanism to break, so that both the first power supply and the second power supply are in a disconnected state from the load.

[0122] Exemplarily, the control module 2 is electrically connected to both the CN phase of the first power supply and the CN phase of the second power supply. The CN phase is the power-taking phase of the control module 2. When the third voltage of the CN phase of the first power supply is outside the second threshold range and the third voltage of the CN phase of the second power supply is also outside the second threshold range, it is determined that both the voltage of the CN phase of the first power supply and the voltage of the CN phase of the second power supply are in an abnormal state. When the cut-off module receives the signal that the voltages of the CN phases of both the first power supply and the second power supply are abnormal, the breaking mechanism in the cut-off module will act to drive both the first breaking mechanism and the second breaking mechanism to break, so that both the first power supply and the second power supply are in a disconnected state from the load.

[0123] Further, please refer to Figure 5 , after the step that the breaking mechanism in the control cut-off module drives both the first breaking mechanism and the second breaking mechanism to break, so that both the first power supply and the second power supply are in a disconnected state from the load, it further includes:

[0124] When the voltage state of the power supply of the abnormal power-taking phase returns to the normal state, detect whether the first breaking mechanism and the second breaking mechanism are in a disconnected state;

[0125] If the first breaking mechanism and / or the second breaking mechanism is in a disconnected state, judge whether the disconnection action of the cut-off module is triggered by the abnormality of the power-taking phase of the first power supply and / or the power-taking phase of the second power supply;

[0126] If so, control the execution module to act, so that the channel switching module switches to the double-breaking state;

[0127] Continuously monitor the voltage states of the first power supply and the second power supply. If the voltage state of the first power supply and / or the second power supply returns to normal, connect the power supply with the normal voltage to the load through the channel switching module;

[0128] If not, judge that the fault is not caused by the abnormality of the power-taking phase, and issue a fault warning to terminate the process of connecting the channel switching module to the load until the fault is cleared.

[0129] Exemplarily, when the voltage state of the power supply of the abnormal power-taking phase returns to the normal state, the control module 2 detects whether the channel switching module 1 is in the disconnected state. The control module 2 will utilize its built-in voltage monitoring function to continuously monitor the voltage of this power supply to ensure that it has stably returned to normal. This monitoring function can be implemented through existing voltage sensors or dedicated voltage detection circuits, which will continuously feed back the voltage information of the power-taking phase to the control module 2 so that the control module 2 can accurately determine whether the voltage has truly returned to normal. The control module 2 will detect whether the channel switching module 1 is in the disconnected state. The control module 2 can receive the status feedback signal of the channel switching module 1 through the connection line between it and the channel switching module 1. For example, the channel switching module 1 can send a signal indicating whether it is currently in the disconnected state or the connected state to the control module 2 through a status feedback circuit, and this signal can be a digital signal (such as a high level indicating disconnection and a low level indicating connection) or an analog signal.

[0130] If the first disconnection mechanism and / or the second disconnection mechanism is in the disconnected state, it is judged whether the disconnection action of the cut-off module is triggered by the abnormality of the power-taking phase of the first power supply and / or the second power supply. This judgment can be obtained by tracing back the previously recorded abnormal information and viewing the associated information between the previously recorded voltage abnormal data and the corresponding disconnection action. If the disconnection of the first disconnection mechanism and / or the second disconnection mechanism is triggered by the abnormality of the power-taking phase of the first power supply and / or the second power supply, then the control module 2 controls the execution module 4 to act, so that the channel switching module 1 is switched to the double-disconnected state. The double-disconnected state means that both the first disconnection mechanism 11 and the second disconnection mechanism 12 are in the tripped state, and the internal energy of the first disconnection mechanism 11 and the second disconnection mechanism 12 is re-stored, and the first disconnection mechanism 11 and the second disconnection mechanism 12 are restored to the state of being ready to close.

[0131] Subsequently, continuously monitor the voltage states of the first power supply and the second power supply. If the voltage state of the first power supply and / or the second power supply returns to normal, connect one of the power supplies with normal voltage restoration to the load through the channel switching module. Exemplarily, the control module 2 sends a connection signal to the corresponding power supply path (such as the part of the channel switching module 1 corresponding to the first power supply or the second power supply). This connection signal can be a start signal, which enables the corresponding switching element (such as a relay or a contactor) to be connected, thereby restoring the connection between this power supply and the load. When sending the connection signal, the control module 2 will ensure the smoothness of the connection operation according to a predetermined logic. For example, by controlling the connection time delay and the current rising rate, the current impact during the connection instant is avoided.

[0132] If not, it is determined that there is a circuit fault in the circuit where the cut-off module 3 is located, and the circuit fault is not caused by an abnormal power phase, and a fault warning is issued, terminating the process of connecting the channel switching module 1 to the load until the fault is cleared. For example, the control module 2 can issue a warning in the form of an audio-visual signal or digital information through a connection with an external alarm system. For example, a fault code is sent to a connected display screen, or a buzzer is triggered to sound an alarm, and at the same time, the control module 2 terminates the process of controlling the channel switching module 1 to connect to the load to prevent the fault from expanding.

[0133] When the abnormal power-taking phase of the power supply returns to normal, the system can restore normal power supply in an orderly manner by checking the disconnection state of the channel switching module 1 and a series of subsequent operations, thereby enhancing the system's ability to recover after a power failure. The judgment and subsequent processing of the disconnection action of the cut-off module 3 enable the system to accurately diagnose the cause of the fault. If it is determined that the disconnection is caused by voltage abnormality, the power supply can be restored; if it is a circuit fault, a warning is issued and the operation is terminated to avoid further damage caused by the circuit fault. The active disconnection of the channel switching module 1 caused by the circuit fault here can be an air switch or other self-protection components inside the channel switching module 1. When it is determined that the disconnection of the channel switching module 1 is caused by a circuit fault, the process of the control module 2 controlling the connection between the channel switching module 1 and the load is terminated to avoid subsequent circuit faults affecting other components, loads, etc. After the staff has investigated and repaired the circuit fault, they will continue to disconnect the signal detection and subsequent steps.

[0134] For further information, see Figure 5 , when the voltage state of the power supply of the abnormal power-taking phase returns to a normal state, after the step of detecting whether the first circuit breaker mechanism and the second circuit breaker mechanism are in a disconnected state, it also includes:

[0135] If both the first circuit breaker mechanism and the second circuit breaker mechanism are not in the disconnected state;

[0136] Determining that the cut-off module and / or the first circuit breaker mechanism and / or the second circuit breaker mechanism are abnormal;

[0137] Control the execution module to switch the channel switching module to the dual-split state;

[0138] Collecting voltage data of the first power supply and the second power supply;

[0139] According to the voltage data, the execution module is controlled to operate so that the load is connected to the first power supply or the second power supply.

[0140] Exemplarily, when the control module 2 detects that the channel switching module 1 is not in the disconnected state, this indicates that during the abnormal and subsequent normal recovery process of the third-phase voltage of the power supply, the channel switching module 1 did not disconnect. At this time, the control module 2 will control the execution module 4 to act, causing the channel switching module 1 to switch to the double-disconnected state, avoiding directly connecting the circuit of one of the channels and resulting in circuit failures. Subsequently, the control module 2 will collect the voltage data of the first power supply and the second power supply, and based on the voltage data, control the execution module 4 to act, enabling the load to be connected to the first power supply or the second power supply. The control module 2 will determine which power supply circuit to connect according to a predetermined priority or other preset rules. For example, in some systems, the first power supply can be preferentially selected. At this time, the control module 2 will send a connection signal to the part of the channel switching module 1 connected to the first power supply. This connection signal can be a specific control pulse or level signal, which is sent to the control circuit of the channel switching module 1 through a wire or a communication bus. When the third-phase voltage of the power supply recovers from the abnormality and the channel switching module 1 is not disconnected, this control method can automatically connect the load to one of the power supplies without manual intervention, improving the automatic recovery ability of the system.

[0141] It should be noted that when the voltage of the control module 2 is abnormal, ideally, the cut-off module 3 should act to disconnect both the first circuit breaker mechanism 11 and the second circuit breaker mechanism 12 to protect the load device. However, in actual operation, due to various factors (such as electromagnetic interference, instantaneous faults of the disconnector itself, mechanical faults, etc.), the disconnector may not succeed in disconnecting the circuit breaker. In this case, by monitoring the disconnection signals of the first circuit breaker mechanism 11 and the second circuit breaker mechanism 12, the control module 2 discovers that no disconnection has occurred. This does not mean ignoring possible problems with the cut-off module 3, but is a fault tolerance mechanism. Exemplarily, if the power supply abnormality is transient and the cut-off module 3 does not trigger a disconnection action at the detection moment, then the control module 2 temporarily considers that this abnormality has not caused a disconnection fault that needs to be processed in the system. This can avoid unnecessary alarms and subsequent processing procedures, preventing the system from frequently entering the abnormal processing state due to instantaneous abnormal conditions and affecting normal operation.

[0142] If the control module 2 detects that the first disconnection mechanism 11 and the second disconnection mechanism 12 are not disconnected, while in fact the power supply of the control module 2 has returned to normal, the program will automatically eliminate the disconnection fault and start the normal switching process. This is because the system believes that the current system is in a relatively stable state and can continue to work normally. However, this does not mean that the problem of the cutting module 3 is ignored. During subsequent monitoring, if there is indeed a problem with the cutting module 3, when an abnormal situation occurs again and the cutting module 3 cannot work properly, the system will continue to detect abnormal phenomena, such as the circuit breaker not being disconnected but the power status remaining abnormal, or the cutting module 3 repeatedly failing to act as expected. At this time, other more in-depth fault diagnosis and processing programs can be triggered. For this situation, the system will record the number of abnormal operations or the duration of the disconnector. When it exceeds a certain threshold, an alarm specifically for the fault of the cutting module 3 will be issued to notify the maintenance personnel to check and repair.

[0143] Meanwhile, specific terms are used in this application to describe the embodiments of this application. Such as "one embodiment", "an embodiment", and / or "some embodiments" mean a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that the "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more at different positions in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0144] Similarly, it should be noted that, in order to simplify the description of this application disclosure and thus help the understanding of one or more application embodiments, in the previous description of the embodiments of this application, sometimes multiple features are merged into one embodiment, drawing, or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than those mentioned in the claims. In fact, the features of the embodiment are less than all the features of the single embodiment disclosed above.

Claims

1. An automatic transfer switch for dual power supplies, characterized in that, Comprising: A channel switching module, provided with a switchable first channel and a second channel, the first channel being used for electrically connecting a load to a first power supply, and the second channel being used for electrically connecting the load to a second power supply; A control module, electrically connected to the channel switching module, the first power supply, and the second power supply, for collecting voltage data of the first power supply and the second power supply, and outputting a first control signal according to the voltage data; A cut-off module, connected to the power supply taking of the control module, and controlling the disconnection of the channel where the cut-off module is located according to the voltage data of the power supply taking phase of the control module; And An execution module, electrically connected to the channel switching module and the control module, the execution module being configured to: receive the first control signal, and perform switching or double splitting of the first channel and the second channel according to the first control signal; Wherein, the voltage data of the first power supply is a first voltage, the voltage data of the second power supply is a second voltage, and the voltage data of the power supply taking phase of the control module is a third voltage.

2. The automatic transfer switch with dual power sources according to claim 1, characterized in that, The channel switching module includes a first disconnection mechanism and a second disconnection mechanism, the first disconnection mechanism being used for electrically connecting to the first power supply and the control module, and the second disconnection mechanism being used for electrically connecting to both the second power supply and the control module; The execution module controls one of the first disconnection mechanism and the second disconnection mechanism to be disconnected and the other to be connected according to the received first control signal, so as to switch the first channel and the second channel.

3. The automatic transfer switch with dual power sources according to claim 1, characterized in that, The channel switching module includes a first disconnection mechanism and a second disconnection mechanism, the first disconnection mechanism being used for electrically connecting to the first power supply and the control module, and the second disconnection mechanism being used for electrically connecting to both the second power supply and the control module; The execution module controls the first disconnection mechanism and the second disconnection mechanism to perform double splitting according to the received first control signal, so that both the first channel and the second channel are in a disconnected state.

4. The automatic transfer switch with dual power sources according to claim 1, characterized in that, The first power supply is electrically connected to the load through the first disconnection mechanism, the second power supply is electrically connected to the load through the second disconnection mechanism, and the control module is connected to both the first power supply and the second power supply; The third voltage is the CN phase voltage in the first power supply and / or the voltage of the CN phase in the second power supply.

5. The automatic transfer switch with dual power sources according to claim 1, wherein, Output a second control signal according to the third voltage for controlling the disconnection of the channel where the cut-off module is located, and the second control signal is generated by the control module or the cut-off module.

6. The automatic transfer switch with dual power sources according to claim 1, characterized in that, The controlling the disconnection of the channel where the cut-off module is located includes maintaining the disconnected state of the first channel and the second channel, or driving the channel where the cut-off module is located to perform disconnection.

7. A control method for a dual-power automatic transfer switch, characterized in that The dual-power automatic transfer switch includes a control module, a channel switching module, an execution module, and a cut-off module. The channel switching module is provided with a switchable first channel and a second channel. The first channel is used for electrically connecting a load to a first power supply, and the second channel is used for electrically connecting the load to a second power supply. The cut-off module is connected to the power supply taking of the control module, and controls the disconnection of the channel where the cut-off module is located according to the voltage data of the power supply taking of the control module. The execution module is electrically connected to the channel switching module and the control module, and is used to execute the switching or double-breaking of the first channel and the second channel; The control method includes: Collecting the voltage data of the first power supply and the second power supply. The voltage data of the first power supply is the first voltage, the voltage data of the second power supply is the second voltage, and the voltage data of the power supply taking of the control module is the third voltage; If the third voltage is normal, switching or double-breaking the first channel and the second channel according to the first voltage and the second voltage; Or If the third voltage is abnormal, maintaining the disconnection state of the first channel and the second channel according to the third voltage, or driving the channel where the cut-off module is located to execute disconnection.

8. The control method of the dual-power automatic transfer switch according to claim 7, characterized in that, The control module is used to switch the first channel and the second channel when one of the first voltage and the second voltage is outside the first threshold range and the other is within the first threshold range; when both the first voltage and the second voltage are outside the first threshold range and the third voltage is normal at this time, disconnect one of the first channel and the second channel that was originally in the on state, and the other channel remains disconnected, so that both the first channel and the second channel are in the disconnected state.

9. The control method of the dual-power automatic transfer switch according to claim 8, characterized in that, The channel switching module includes a first breaking mechanism and a second breaking mechanism. The first power supply is electrically connected to the load through the first breaking mechanism, and the second power supply is electrically connected to the load through the second breaking mechanism. The control module is connected to both the first power supply and the second power supply; the voltage data in the first power supply is divided into the power supply taking voltage or the non-power supply taking voltage, the voltage data in the second power supply is divided into the power supply taking voltage or the non-power supply taking voltage, and the power supply taking voltage of the first power supply or the second power supply is the third voltage; The step of switching or double-breaking the first channel and the second channel according to the first voltage and the second voltage includes: When the first voltage is outside the first threshold range and the second voltage is within the first threshold range, judging whether the current load is connected to the first power supply; If so, the execution module controls the first channel to disconnect and connects the second channel, so that the load switches from being connected to the first power supply to being connected to the second power supply.

10. The control method of the dual-power automatic transfer switch according to claim 8, characterized in that The channel switching module includes a first breaking mechanism and a second breaking mechanism. The first power supply is electrically connected to the load through the first breaking mechanism, and the second power supply is electrically connected to the load through the second breaking mechanism. The control module is connected to both the first power supply and the second power supply. The voltage data in the first power supply is divided into a powered-phase voltage or a non-powered-phase voltage, and the voltage data in the second power supply is divided into a powered-phase voltage or a non-powered-phase voltage. The powered-phase voltage of the first power supply or the second power supply is the third voltage; The step of switching or double-breaking the first channel and the second channel according to the first voltage and the second voltage includes: When the first voltage is within the first threshold range and the second voltage is outside the first threshold range, determine whether the current load is connected to the second power supply; If so, the execution module controls the second channel to be disconnected and the first channel to be connected, so that the load is switched from being connected to the second power supply to being connected to the first power supply.

11. The control method of the dual-power automatic transfer switch according to claim 8, characterized in that, The channel switching module includes a first breaking mechanism and a second breaking mechanism. The first power supply is electrically connected to the load through the first breaking mechanism, and the second power supply is electrically connected to the load through the second breaking mechanism. The control module is connected to both the first power supply and the second power supply. The voltage data in the first power supply is divided into a powered-phase voltage or a non-powered-phase voltage, and the voltage data in the second power supply is divided into a powered-phase voltage or a non-powered-phase voltage. The powered-phase voltage of the first power supply or the second power supply is the third voltage; The step of switching or double-breaking the first channel and the second channel according to the first voltage and the second voltage includes: When both the first voltage and the second voltage are outside the first threshold range, the control module determines that the non-powered-phase voltages of the first power supply and the second power supply are both in an abnormal state, and either the powered-phase voltage of the first power supply or the powered-phase voltage of the second power supply is in a normal state; Determine whether the current load is connected to the first power supply or the second power supply; If the current load is connected to the first power supply or the second power supply, control both the first breaking mechanism and the second breaking mechanism to be in the open state, so that the load is disconnected from both the first power supply and the second power supply.

12. The control method of the dual-power automatic transfer switch according to claim 11, characterized in that, After the step of, if the current load is connected to the first power supply or the second power supply, controlling both the first breaking mechanism and the second breaking mechanism to be in the open state, so that the load is disconnected from both the first power supply and the second power supply, further includes: Continuously monitor the voltage states of the first power supply and the second power supply; If the voltage states of the first power supply and / or the second power supply return to normal, connect the power supply with the normal voltage restored to the load through the channel switching module.

13. The control method of the dual-power automatic transfer switch according to claim 7, characterized in that, The channel switching module includes a first breaking mechanism and a second breaking mechanism. The first power supply is electrically connected to the load through the first breaking mechanism, and the second power supply is electrically connected to the load through the second breaking mechanism. The control module is connected to both the first power supply and the second power supply. The voltage data in the first power supply is divided into a power-taking phase voltage or a non-power-taking phase voltage, and the voltage data in the second power supply is divided into a power-taking phase voltage or a non-power-taking phase voltage. The power-taking phase voltage of the first power supply or the second power supply is the third voltage. Maintaining the open states of the first channel and the second channel according to the third voltage, or driving the channel where the cut-off module is located to perform the disconnection step includes: When the third voltage is outside the second threshold range, it is determined that the power-taking phase voltage of the first power supply and / or the power-taking phase voltage of the second power supply is in an abnormal state. Controlling the breaking mechanism in the cut-off module to drive both the first breaking mechanism and / or the second breaking mechanism to disconnect, so that both the first power supply and the second power supply are in a disconnected state from the load.

14. The control method of the dual-power automatic transfer switch according to claim 13, characterized in that, After the step of controlling the breaking mechanism in the cut-off module to drive both the first breaking mechanism and / or the second breaking mechanism to disconnect, so that both the first power supply and the second power supply are in a disconnected state from the load, it further includes: When the abnormal third voltage state returns to the normal state, it is judged whether the disconnection action of the cut-off module is triggered by the abnormality of the power-taking phase of the first power supply and / or the power-taking phase of the second power supply. If so, control the execution module to act, so that the channel switching module switches to the double-breaking state. Continuously monitor the voltage states of the first power supply and the second power supply. If the voltage states of the first power supply and / or the second power supply return to normal, connect one of the power supplies with the normal voltage restoration to the load through the channel switching module. If not, it is judged that the fault is not caused by the abnormality of the power-taking phase, and a fault warning is issued, and the process of connecting the channel switching module to the load is terminated until the fault is cleared.

Images