Protection system of standby power device and wind generating set

Abstract

The utility model provides a protection system of a standby power device and a wind generating set. The protection system of the standby power device comprises the standby power device which comprises a battery; a power conversion module connected to the standby power device via a first switch and connected to an external power supply via a second switch; the voltage sensor is used for detecting the voltage of the standby power device; and the controller is used for receiving the voltage signal output by the voltage sensor and controlling the first switch and the second switch to be switched on and switched off. When the power conversion module stops output, the standby power device is disconnected from the electric equipment to protect the standby power device, and when the main power system recovers power supply, the standby power device is automatically charged to prolong the service life of the standby power device. In addition, the charging state of the standby power device is monitored, so that reliable operation of the power system is improved, and the standby power device is protected.

Description

Technical Field

[0001] The present disclosure relates to the field of wind power generation, and in particular to a protection system for a backup power device and a wind turbine generator set. Background Art

[0002] A backup power supply provides uninterruptible power protection and is widely used to power various critical electrical equipment and systems. It ensures a stable power supply, preventing the impact of power system failures on electrical equipment and systems. If the primary power system fails, the backup power supply is immediately switched to the backup power supply to maintain power for a predetermined period of time.

[0003] However, the existing system does not protect the backup power device. When the power supply is terminated and the output stops, the backup power device is not disconnected from the power-consuming equipment or system. The backup power device that remains connected will continue to consume energy, resulting in a shortened service life of the backup power device and the risk of irreversible failure. In addition, the existing system does not monitor the charging status of the backup power device. When the power supply of the main power system is operating normally, the charging status of the backup power device is not monitored, resulting in the backup power device not completing charging in time when the main power system fails, causing the backup power device to be unable to supply power normally, thereby increasing the risk of power outages. In addition, when the main power system fails and switches to the backup power device to continue powering, the power supply time of the backup power device cannot be predicted, resulting in insufficient safety of the power system. Utility Model Content

[0004] To solve the above technical problems, the present disclosure provides a protection system for a backup power device. When the main power system fails, the backup power device is enabled to maintain power supply. When the power conversion module stops outputting, the backup power device is disconnected from the power-consuming equipment to protect the backup power device. When the main power system resumes power supply, the backup power device automatically starts charging to extend the service life of the backup power device. In addition, the charging status of the backup power device is monitored to improve the reliable operation of the power system and protect the backup power device. In addition, when the main power system fails and switches to the backup power device for power supply, the backup power device can calculate the power supply time and feedback an alarm signal in response to the power supply time not meeting the system requirements.

[0005] The present disclosure provides a protection system for a backup power device, which includes: a backup power device including a battery; a power conversion module connected to the backup power device via a first switch and connected to an external power supply via a second switch; a voltage sensor for detecting the voltage of the backup power device; and a controller for receiving a voltage signal output by the voltage sensor and controlling the closing and opening of the first switch and the second switch.

[0006] Optionally, the power conversion module includes a charging part connected between the external power source and the backup power device, and a power supply part connected between the backup power device and an external power-consuming device.

[0007] Optionally, the first switch includes: a buffer device and a relay, connected in series between the power conversion module and the backup power device; and a second sub-switch, the contacts of which are respectively connected to the power conversion module and the backup power device.

[0008] Optionally, the first switch further includes a manual button, and the second sub-switch is linked to the manual button.

[0009] Optionally, the protection system further includes: a controller power supply, providing power to the controller, and the backup power device is connected to the controller power supply via a third switch.

[0010] Optionally, a third sub-switch, the contacts of the third sub-switch are respectively connected to the controller power supply and the backup power device, and the control coil of the third sub-switch is connected to the external power supply; and a fourth sub-switch and a manual button, the fourth sub-switch is connected in parallel with the third sub-switch and the manual button is linked to the fourth sub-switch.

[0011] Optionally, the protection system further includes: a maintenance switch, wherein contacts of the maintenance switch are respectively connected to the backup power device and the third switch.

[0012] Optionally, the protection system further includes: an alarm signal unit connected to the controller.

[0013] The present disclosure provides a wind turbine generator set, which includes the protection system of the backup power device as described above.

[0014] In the embodiments of the present disclosure, when the power conversion module stops outputting power, the backup device can be disconnected from the power-consuming equipment to protect the backup device. When the main power system resumes power, the backup device automatically charges to extend its service life. Furthermore, the charging status of the backup device can be monitored to improve the reliable operation of the power system and protect the backup device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a block diagram of a protection system for a backup power device according to an embodiment.

[0016] Figure 2 is a block diagram of a protection system for a backup power device according to another embodiment.

[0017] Figure 3 is a flowchart of a protection method for a backup power device according to an embodiment.

[0018] Figure 4 is a flow chart of a protection method for a backup power device according to another embodiment. DETAILED DESCRIPTION

[0019] The following specific embodiments are provided to help the reader gain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example and is not limited to the order set forth herein, but in addition to the operations that must occur in a specific order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, for clarity and brevity, descriptions of features known in the art may be omitted. In order to enable those skilled in the art to better understand the present invention, specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0020] The accompanying drawings are provided only to facilitate understanding of the embodiments disclosed in this specification and should not be interpreted as limiting the spirit disclosed in this specification. It should be understood that this disclosure includes all modifications, equivalents, and replacements without departing from the scope and spirit of the disclosure.

[0021] Figure 1 is a block diagram of a protection system for a backup power device according to an embodiment.

[0022] Reference Figure 1 According to an embodiment, a protection system for a backup power device may include: a backup power device 110, including a battery; a power conversion module 120, connected to the backup power device 110 via a first switch 130, and connected to an external power supply via a second switch 140; a voltage sensor 152, detecting the voltage of the backup power device 110; and a controller 150, receiving a voltage signal output by the voltage sensor 152, and controlling the closing and opening of the first switch 130 and the second switch 140.

[0023] according to Figure 1 In this embodiment, when power conversion module 120 stops outputting power, the backup power device is disconnected from the power-consuming equipment to protect the backup power device. When the main power system resumes power, the backup power device automatically starts charging to extend its service life. Furthermore, the backup power device's charging status is monitored to improve the reliable operation of the power system and protect the backup power device.

[0024] Figure 2 is a block diagram of a protection system for a backup power device according to another embodiment.

[0025] Reference Figure 2In the protection system, an external power source can supply power to the power conversion module 120 and simultaneously serve as the primary power source to provide power to external power devices. The power conversion module 120 may include a charging section 121 connected between the external power source and the backup power device 110, and a power supply section 122 connected between the backup power device 110 and the external power devices. When the external power input is normal, the charging section 121 can charge the backup power device 110 and provide power to the controller 150 (e.g., via the controller power supply 151 described later). To meet maximum power requirements, the output power of the charging section 121 can be greater than the sum of a predetermined charging power (e.g., rated power or peak power) and the controller standby power. The power supply section 122 is used to provide power to external power devices via the backup power device 110 or an external power source. The power supply section 122 can convert the power of the backup power device 110 into stable power that can be used by external power devices through power conversion. Optionally, the charging section 121 and the power supply section 122 can be integrated. The power conversion module 120 may include a status signal. Specifically, the power supply part 122 may have a status signal, and the status signal may be sent to the controller 150 so that the controller 150 determines the operating status of the power conversion module 120 according to the status signal of the power conversion module 120.

[0026] according to Figure 2 The protection system for the backup power device of this embodiment may further include a controller power supply 151, which provides power to the controller 150. The backup power device 110 is connected to the controller power supply 151 via a third switch 160. The controller power supply 151 can convert the power provided by the backup power device 110 or the charging unit 121 into power that can be used by the controller 150. When the external power supply fails, the backup power device will be switched to supply power. The backup power device 110 will convert the stored power through the power supply unit 122 to continue supplying power to external power devices. At the same time, the backup power device 110 will supply power to the controller 150 through the controller power supply 151.

[0027] The first switch 130 may include a buffer device 131, a first sub-switch 132, and a second sub-switch 133. The buffer device 131 and the first sub-switch 132 are connected in series between the power conversion module 120 and the backup power device 110. The buffer device 131 may include at least one of a resistor, a capacitor, and an inductor, and limit current when the first sub-switch 132 is switched on and off. The second sub-switch 133 has contacts connected to the power conversion module 120 and the backup power device 110, respectively, and closes after a predetermined delay after the first sub-switch 132 closes. The first switch 130 is controlled by the controller 150. Optionally, the second sub-switch 133 includes a manual button 134, which can be operated independently of the closing step of the first sub-switch 132. Manual button 134 directly controls the on / off switching of second sub-switch 133 in first switch 130. Manual button 134 can be normally open. When a protection system failure requires manual activation of power supply 122, manual button 134 can be closed, simultaneously manually opening fourth sub-switch 162 (described below) (e.g., via manual button 163). Power conversion module 120 can be connected to an external power source via second switch 140. Alternatively, first switch 130 and second switch 140 can be integrated. For example, first switch 130 can further include contacts connected between the external power source and power conversion module 120. These contacts can be closed when manual button 134 is closed and can be controlled by controller 150 to operate synchronously with first switch 130.

[0028] The third switch 160 may include a third sub-switch 161. The third sub-switch 161 may include multiple pairs of contacts. One pair of contacts of the third sub-switch 161 may be connected to the controller power supply 151 and the backup power device 110, respectively. The other pair of contacts of the third sub-switch 161 may provide a status signal to the controller 150. The control coil of the third sub-switch 161 is connected to an external power source, so that the on / off switching of the external power source controls the on / off switching of the third sub-switch 161. For example, when the external power source fails and the power supply remains normal, the third sub-switch 161 is closed; when the external power source fails and the power is cut off, the third sub-switch 161 is opened.

[0029] Third switch 160 may also include a fourth sub-switch 162 and a manual button 163. The contacts of fourth sub-switch 162 are connected to controller power supply 151 and backup power device 110, respectively. Fourth sub-switch 162 may be connected in parallel to third sub-switch 161 and is controlled by controller 150. Manual button 163 is linked to fourth sub-switch 162. The contacts of fourth sub-switch 162 are normally open. When the external power fails and controller 150 in the system is in the off state, fourth sub-switch 162 can be manually closed to activate power supply 122.

[0030] The voltage sensor 152 may sample the voltage of the backup power device 110 in real time and send the sampled voltage signal to the controller 150 . Optionally, the voltage sensor 152 may also be integrated into the controller 150 .

[0031] According to another embodiment, the protection system of the backup power device may further include a maintenance switch 170, wherein the contacts of the maintenance switch 170 are connected between the backup power device 110 and the third switch 160. The maintenance switch 170 is manually controlled to be on and off. The maintenance switch 170 may be in a normally closed state and opened manually during maintenance or inspection.

[0032] According to another embodiment, the protection system of the backup power device also includes an alarm signal unit 180, which is connected to the controller 150. The alarm signal output by the controller 150 can be output through the alarm signal unit 180 in any form such as sound, indicator light, active signal, dry node signal, etc.

[0033] The controller 150 may have input signals, which may include an on / off state signal of the third sub-switch 161, an output signal of the voltage sensor 152, and a state signal of the power conversion module 120. The controller 150 may have output signals, which may include a switch control signal for controlling the switch (130, 160, and / or 140) to be closed or opened, and an alarm signal displayed by the alarm signal unit 180.

[0034] Figure 3 is a flowchart of a protection method for a backup power device according to an embodiment.

[0035] Reference Figures 1 to 3 According to an embodiment, a method for protecting a backup power device includes the following steps: in step 301, determining whether an external power input is normal. In response to the external power input being normal, the second switch 140 may be controlled to be closed in step 302. In step 303, determining whether an output value of the voltage sensor 152 is within a predetermined range. In response to the output value of the voltage sensor 152 being within the predetermined range, the first switch 130 may be controlled to be closed in step 304 to enable the power conversion module 120. In response to the output value of the voltage sensor 152 being outside the predetermined range, the first switch 130 may be controlled to be opened in step 305.

[0036] According to another embodiment, it may also be determined at step 301 whether the external power input is normal. In response to the external power input being normal, the third switch 160 may be controlled to be closed at step 302. In step 303, it may be determined whether the output value of the voltage sensor 152 is within a predetermined range. In response to the output value of the voltage sensor 152 being within the predetermined range, the first switch 130 and the second switch 140 may be controlled to be closed to enable the power conversion module 120 at step 304. In response to the output value of the voltage sensor 152 being outside the predetermined range, the first switch 130 may be controlled to be opened at step 305, but the present disclosure is not limited thereto.

[0037] According to the embodiment, the backup power device can be activated to maintain power supply when the main power system fails. According to the embodiment, the backup power device protection method can disconnect the backup power device from the power-consuming equipment to protect the backup power device when the power conversion module stops outputting. When the main power system resumes power supply, the backup power device automatically starts charging to extend the service life of the backup power device. In addition, the charging status of the backup power device is monitored to improve system reliability and protect the backup power device.

[0038] Figure 4 is a flow chart of a protection method for a backup power device according to another embodiment.

[0039] Reference Figure 4 The method for protecting a backup power device according to an embodiment may further include determining, at step 401, whether the power conversion module 120 is enabled. At step 402, in response to the external power source stopping supplying power and the power conversion module 120 being disabled, controlling the first switch 130 and the second switch 140 to be disconnected, thereby isolating the backup power device 110 to protect the backup power device.

[0040] In addition, the protection method may also include, in step 403, in response to the external power supply stopping power supply and the power conversion module 120 being enabled, controlling the first switch 130 and the second switch 140 to be disconnected when the backup power device 110 supplies power for more than the target duration or the backup power device 110 reaches a minimum voltage value, thereby isolating the backup power device to reduce standby power consumption.

[0041] In addition, when the main power system fails and switches to the backup power device for power supply, the protection method may also include estimating the power supply time for the backup power device 110 to reach the minimum voltage based on the current voltage and discharge current of the backup power device 110, and issuing an alarm signal in response to the estimated remaining time being less than the target duration.

[0042] In addition, the protection method of the backup power device according to the embodiment may also include: in response to the external power input being normal, controlling the third switch to be continuously closed without detecting the output state of the power conversion module; and in response to the external power input failure, changing to simultaneously detecting the status signal of the power conversion module and the voltage value output by the voltage sensor.

[0043] In addition, the protection method of the backup power device according to the embodiment may also include: in the event of an external power input failure, in response to the power conversion module being enabled and the voltage value of the voltage sensor being within a predetermined range, enabling the backup power device to supply power; and in response to the power conversion module failing or the voltage value of the voltage sensor being outside the predetermined range, controlling the first switch, the second switch, and the third switch to be disconnected.

[0044] Charging mode

[0045] According to the protection method for a backup power device of this embodiment, when the external power input is normal, third sub-switch 161 closes in response to the normal external power supply. In response to the closing of third sub-switch 161, the controller closes the connection between backup power device 110 and controller power supply 151 via maintenance switch 170. Controller power supply 151 supplies power to controller 150, thereby enabling controller 150. In response to the closing of third sub-switch 161, controller 150 does not detect the status signal of power conversion module 120, but only detects the voltage value V output by voltage sensor 152. Alternatively, in response to the normal external power input, third switch 160 may be preferentially controlled to remain closed without detecting the output status of power conversion module 120.

[0046] When voltage value V is within a predetermined range (i.e., voltage value V is greater than the minimum voltage V1 of backup power device 110 and less than or equal to the maximum voltage V2 of backup power device 110), controller 150 may close first switch 130. Closing first switch 130 may include first closing first sub-switch 132 and then closing second sub-switch 133 after a delay time t1. Furthermore, controller 150 may close second switch 140 after a delay time t2. At this point, charging unit 121 receives power from an external power source, charges backup power device 110, and provides power to controller power supply 151. Furthermore, controller 150 may control fourth sub-switch 162 to close after a delay time t3. Thereafter, the controller 150 collects and analyzes the voltage value V of the backup power device 110 measured by the voltage sensor 152. If the voltage value V is greater than V2, or if the voltage value V is less than V2 by more than a predetermined voltage value (hereinafter, 2 (V) as an example, but the present disclosure is not limited thereto) and less than the initial measurement value, the controller 150 displays an alarm signal via the alarm signal unit 180 to indicate a charging failure, and simultaneously disconnects the second sub-switch 133 and the first sub-switch 132 in sequence at predetermined time intervals. If the voltage value V is less than V2 by more than 2 (V) and greater than the initial measurement value, or if the voltage value V is less than V2 by no more than 2 (V) and less than or equal to V2, the controller 150 recognizes that the backup power device 110 is being charged normally by the charging unit 121, and the aforementioned voltage measurement and comparison steps are repeated at predetermined time intervals.

[0047] In addition, when the voltage value V is not within the predetermined range, that is, the voltage value V is less than the minimum voltage V1 of the backup power device 110 or greater than the maximum voltage V2 of the backup power device 110, the controller 150 can display an alarm signal through the alarm signal unit 180 to feedback the fault. At this time, the controller 150 will disconnect the first switch 130 to make the power supply part 122 in the power conversion module 120 unable to be enabled.

[0048] Power supply mode

[0049] If the external power supply is normal and the power supply unit 122 of the power conversion module 120 is enabled, and the external power supply is disconnected, the power system automatically switches to power from the backup power device 110, and the power supply unit 122 can operate normally. If the external power supply fails, the control coil of the third sub-switch 161 loses power, causing the third sub-switch 161 to open, and a signal indicating the disconnection of the third sub-switch 161 is fed back to the controller 150. In response to the external power input failure (i.e., the disconnection of the third sub-switch 161), the controller 150 changes to simultaneously detect the status signal of the power conversion module 120 and the voltage value V output by the voltage sensor 152.

[0050] In the event of an external power input failure, in response to the activation of power conversion module 120 and the voltage value V of voltage sensor 152 being within a predetermined range, backup power device 110 is enabled to supply power. Controller 150 may accumulate the power supply time of backup power device 110 and, based on the voltage value of backup power device 110 detected by voltage sensor 152 and the state of power conversion module 120 (e.g., the current value), calculate the remaining time until backup power device 110 is powered to a lower limit voltage. This lower limit voltage may be greater than a discharge cutoff voltage of backup power device 110 (the discharge cutoff voltage of backup power device 110 is greater than the lowest voltage V1 of backup power device 110). Controller 150 may compare the remaining time with a target duration of backup power device 110. If the remaining time is less than the target duration of backup power device 110, controller 150 may output an alarm signal through alarm signal unit 180 to indicate that the power supply time is insufficient and maintain power supply to backup power device 110. If the remaining time is greater than or equal to the target duration of backup power device 110, controller 150 may not output an alarm signal and maintain power supply to backup power device 110. Thereafter, at predetermined intervals, the controller may again calculate the remaining power supply time of the backup power device 110 based on the accumulated power supply time, the voltage value of the backup power device 110 detected by the voltage sensor 152, and the status of the power conversion module 120, and compare the remaining power supply time of the backup power device 110 with the target duration corrected based on the accumulated power supply time. The power supply portion 122 stops outputting power when the voltage value of the voltage sensor 152 reaches the lower voltage limit or the power supply time reaches the target duration, and the status signal of the power conversion module 120 received by the controller indicates that the power conversion module 120 is disabled. In this case, in response to the power conversion module 120 being disabled for the predetermined period, the controller 150 may sequentially disconnect the second sub-switch 133, the first sub-switch 132, the second switch 140, and the fourth sub-switch 162 at predetermined time intervals, thereby disconnecting the backup power device 110 from the power system and protecting the backup power device 110. Optionally, in response to the output current of the power conversion module 120 being zero for a predetermined time, the controller 150 can disconnect the second sub-switch 133, the first sub-switch 132, the second switch 140, and the fourth sub-switch 162 in sequence at predetermined time intervals, and the backup power device 110 is disconnected from the power system to protect the backup power device 110.

[0051] Furthermore, if the external power supply is disconnected while the external power supply is normal and the power supply section 122 of the power conversion module 120 is inactive, the control coil of the third sub-switch 161 loses power, causing the third sub-switch 161 to disconnect. Simultaneously, a signal indicating the disconnection of the third sub-switch 161 is fed back to the controller 150. In response to the disconnection of the third sub-switch 161, the controller 150 changes to simultaneously detecting the status signal of the power conversion module 120 and the voltage value V output by the voltage sensor 152. If the power supply section 122 is not functioning properly, the status signal of the power conversion module 120 received by the controller indicates that it is inactive (or faulty). When the external power input fails, in response to the failure of the power conversion module 120 or the voltage value V of the voltage sensor 152 being outside the predetermined range, the controller 150 controls the first switch 130, the second switch 140, and the third switch 160 to be disconnected. Specifically, the controller 150 may disconnect the second sub-switch 133, the first sub-switch 132, the second switch 140, and the fourth sub-switch 162 in sequence at predetermined time intervals after the power conversion module 120 fails or the voltage value V of the voltage sensor 152 is outside the predetermined range for a predetermined time, thereby disconnecting the backup power device 110 from the power system, thereby protecting the backup power device 110.

[0052] Manual mode

[0053] The protection method according to an embodiment may further include closing fourth sub-switch 162 of third switch 160 in response to a manual button operation when the external power supply stops supplying power and power conversion module 120 is not enabled. If the external power supply fails and power supply section 122 of power conversion module 120 is not enabled, when it is necessary to enable power supply section 122, fourth sub-switch 162 may be closed by manually closing manual button 163, thereby closing the connection between backup power device 110 and controller power supply 151. Controller power supply 151 outputs power to controller 150 to enable controller 150, and controller 150 receives voltage value V detected by voltage sensor 152. When the voltage value V is less than or equal to the minimum voltage V1 of the backup power device 110 or greater than the maximum voltage V2 of the backup power device 110, the controller 150 outputs an alarm signal through the alarm signal unit 180 and maintains the power supply part 122 not enabled; when the voltage value V is greater than the minimum voltage V1 of the backup power device 110 and less than or equal to the maximum voltage V2 of the backup power device 110, the controller 150 closes the first sub-switch 132, closes the second sub-switch 133 after a delay time t1, closes the second switch 140 after a delay time t2, and closes the fourth sub-switch 162 after a delay time t3. The controller 150 will then receive the status signal of the power conversion module 120. If the power supply part 122 is not working, the status signal of the power conversion module 120 will be shown as not enabled (or faulty). In response to the power conversion module 120 not being enabled for a predetermined time, the controller 150 can disconnect the second sub-switch 133, the first sub-switch 132, the second switch 140, and the fourth sub-switch 162 in sequence at predetermined time intervals (manually disconnected by the manual button 163), and the backup power device 110 is disconnected from the power system to protect the backup power device 110. If the power supply unit 122 is enabled and outputting power, the controller 150 accumulates the power supply time of the backup power device 110 and calculates the remaining time for the backup power device 110 to be powered to a lower limit voltage based on the voltage value of the backup power device 110 detected by the voltage sensor 152 and the state of the power conversion module 120 (e.g., the current value). The lower limit voltage may be greater than the discharge cutoff voltage of the backup power device 110 (the discharge cutoff voltage of the backup power device 110 is greater than the lowest voltage V1 of the backup power device 110). The controller 150 may compare the remaining time with the target duration of the backup power device 110. In response to the remaining time being less than the target duration of the backup power device 110, the controller 150 may output an alarm signal through the alarm signal unit 180 to indicate that the power supply time is insufficient and maintain power supply to the backup power device 110. In response to the remaining time being greater than or equal to the target duration of the backup power device 110, the controller 150 may not output the alarm signal and maintain power supply to the backup power device 110.Thereafter, at predetermined intervals, the controller may again calculate the remaining power supply time of the backup power device 110 based on the accumulated power supply time, the voltage value of the backup power device 110 detected by the voltage sensor 152, and the status of the power conversion module 120, and compare the remaining power supply time of the backup power device 110 with the target duration corrected based on the accumulated power supply time. The power supply portion 122 stops outputting power when the voltage value of the voltage sensor 152 reaches the lower voltage limit or the power supply time reaches the target duration, and the controller receives a status signal indicating that the power conversion module 120 is inactive. In this case, in response to the power conversion module 120 being inactive for the predetermined period, the controller 150 may sequentially open the second sub-switch 133, the first sub-switch 132, the second switch 140, and the fourth sub-switch 162 at predetermined time intervals (manually opened using the manual button 163), thereby disconnecting the backup power device 110 from the power system and protecting the backup power device 110. Optionally, in response to the output current of the power conversion module 120 being zero for a predetermined time, the controller 150 can disconnect the second sub-switch 133, the first sub-switch 132, the second switch 140, and the fourth sub-switch 162 in sequence at predetermined time intervals (manually disconnected by the manual button 163), and the backup power device 110 is disconnected from the power system to protect the backup power device 110.

[0054] When the controller fails and the remaining components of the power system can work normally, when the power supply part 122 needs to be activated, the maintenance switch 170 can be manually opened and the manual button 134 can be manually closed to activate the backup power device 110 and the external power supply.

[0055] According to an exemplary embodiment of the present invention, a computer-readable storage medium storing a computer program is also provided. The computer-readable storage medium stores a program that, when executed by a processor, causes the processor to execute the protection method for the backup power device according to the present invention. The computer-readable recording medium is any data storage device that can store data read by a computer system. Examples of computer-readable recording media include: read-only memory, random access memory, read-only optical disc, magnetic tape, floppy disk, optical data storage device, and carrier wave (such as data storage via the Internet via a wired or wireless transmission path).

[0056] According to an exemplary embodiment of the present invention, a computer device is further provided. The computer device includes a processor and a memory. The memory is configured to store a computer program. The computer program is executed by the processor so that the processor performs the protection method for a backup power device according to the present invention.

[0057] According to an embodiment of the present disclosure, when the power conversion module stops outputting power, the backup power device is disconnected from the power-consuming equipment to protect the backup power device, and when the main power system resumes power supply, the backup power device is automatically put into charging to extend the service life of the backup power device. In addition, the charging status of the backup power device is monitored to improve the reliable operation of the power system and protect the backup power device. In addition, when the main power system fails and switches to the backup power device for power supply, the backup power device can calculate the power supply time and keep it updated and corrected, and feedback an alarm signal in response to the power supply time not meeting the system requirements.

[0058] While the present disclosure has been described in connection with what are presently considered to be practical embodiments, it is to be understood that the disclosure is not limited to the disclosed embodiments, but, rather, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A protection system for a backup power device, characterized in that: The protection system of the backup power device includes: power backup devices, including batteries; a power conversion module connected to the backup power device via a first switch and connected to an external power source via a second switch; A voltage sensor, detecting the voltage of the backup power device; The controller receives the voltage signal output by the voltage sensor and controls the closing and opening of the first switch and the second switch.

2. The protection system according to claim 1, characterized in that The power conversion module includes a charging part connected between the external power source and the backup power device and a power supply part connected between the backup power device and an external power-consuming device.

3. The protection system according to claim 1, characterized in that The first switch includes: a buffer device and a first sub-switch connected in series between the power conversion module and the backup power device; and A second sub-switch, wherein contacts of the second sub-switch are respectively connected to the power conversion module and the backup power device.

4. The protection system according to claim 3, characterized in that The first switch further includes a manual button, and the second sub-switch is linked to the manual button.

5. The protection system according to claim 1, characterized in that The protection system further comprises: A controller power supply provides power to the controller, and the backup power device is connected to the controller power supply via a third switch.

6. The protection system according to claim 5, characterized in that The third switch includes: a third sub-switch, wherein contacts of the third sub-switch are respectively connected to the controller power supply and the backup power device, and a control coil of the third sub-switch is connected to the external power supply; and A fourth sub-switch and a manual button, the fourth sub-switch is connected in parallel with the third sub-switch and the manual button is linked to the fourth sub-switch.

7. The protection system according to claim 6, characterized in that The protection system further comprises: A maintenance switch, wherein contacts of the maintenance switch are respectively connected to the backup power device and the third switch.

8. The protection system according to claim 1, characterized in that The protection system further comprises: An alarm signal unit is connected to the controller.

9. A wind turbine generator set, characterized in that: The wind turbine generator set includes the protection system of the backup power device according to any one of claims 1 to 8.

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