Synchronization mechanism and low-voltage bus synchronization adjusting system

Abstract

The utility model relates to the technical field of synchronism, and particularly discloses a synchronism mechanism and a low-voltage bus synchronism adjusting system, the synchronism mechanism comprises an acquisition module and an adjusting module, the acquisition module is used for acquiring voltage parameters of a working low-voltage bus and a low-voltage bus to be connected and disconnected, the adjusting module is in communication connection with the acquisition module, and the acquisition module is used for acquiring voltage parameters of the working low-voltage bus and the low-voltage bus to be connected and disconnected. And the adjusting module is used for receiving the voltage parameters and adjusting the on-off state of the first incoming circuit breaker and the second incoming circuit breaker, or adjusting the on-off state of the first interconnection circuit breaker and the second interconnection circuit breaker. When the acquisition module detects that the voltage parameters of the working low-voltage bus and the low-voltage bus to be switched on and switched off meet the same period condition, the adjusting module adjusts the first incoming circuit breaker and the second incoming circuit breaker to be switched on, or the adjusting module adjusts the first interconnection circuit breaker and the second interconnection circuit breaker to be switched on. The power failure time of the downstream load during the operation mode switching period of the low-voltage bus to be switched on and off is reduced, and the normal operation and debugging work of the downstream load are prevented from being influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of synchronization, in particular to a synchronization mechanism and a low-voltage bus synchronization adjustment system. Background Art

[0002] The 400V low-voltage busbar of the nuclear power plant is powered by a 10kV medium-voltage busbar through a dry-type transformer, which is used to provide power to the 380V motor control center and motors above 75kW and below 200kW. In order to achieve the diversity of operation modes, interconnection circuit breakers are set up between two adjacent sections of low-voltage busbars. When the medium-voltage busbar upstream of the low-voltage busbar is under maintenance, power can be supplied to its downstream loads through interconnection.

[0003] However, when the low-voltage bus is switched from normal load to contact load or from contact load to normal load, the downstream load needs to be shut down for switching. On the one hand, a large number of loads downstream of the low-voltage bus will lose power for a short time, affecting the normal operation and commissioning of the equipment and seriously affecting the progress of on-site commissioning. On the other hand, it increases the workload of the operating personnel and there is a risk of introducing human errors during operation. Utility Model Content

[0004] The utility model aims to provide a synchronization mechanism and a low-voltage bus synchronization adjustment system to solve the problem in the related art that during the switching of the low-voltage bus operation mode, the downstream load needs to be shut down for switching.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] In a first aspect, the utility model provides a synchronization mechanism for synchronizing a working low-voltage busbar and a low-voltage busbar to be switched on and off, wherein the working low-voltage busbar is provided with a first incoming circuit breaker and a first connecting circuit breaker, and the low-voltage busbar to be switched on and off is provided with a second incoming circuit breaker and a second connecting circuit breaker, and the working low-voltage busbar and the low-voltage busbar to be switched on and off can be electrically connected through the first connecting circuit breaker and the second connecting circuit breaker, and the synchronization mechanism includes:

[0007] A collection module, the collection module is used to collect voltage parameters of the working low-voltage bus and the low-voltage bus to be switched on and off;

[0008] An adjustment module is communicatively connected with the acquisition module, and is used to receive voltage parameters of the working low-voltage bus and the low-voltage bus to be switched on and off and adjust the on-off state of the first incoming circuit breaker and the second incoming circuit breaker, or adjust the on-off state of the first connecting circuit breaker and the second connecting circuit breaker.

[0009] In one embodiment, the first connecting circuit breaker is configured as a normally-on connecting circuit breaker, and the acquisition module and the adjustment module are both communicatively connected to the second connecting circuit breaker.

[0010] In one embodiment, the first incoming line circuit breaker is configured as a normally-on incoming line circuit breaker, and the acquisition module and the adjustment module are both communicatively connected to the second incoming line circuit breaker.

[0011] In one of the embodiments, the acquisition module is used to acquire the amplitude, frequency and phase angle of the voltage of both the working low-voltage bus and the low-voltage bus to be switched on and off.

[0012] In one of the embodiments, the synchronization mechanism further includes a shell and a movable part, the acquisition module and the adjustment module are arranged in the shell, the movable part is rotatably connected to the shell, and the movable part is used to drive the shell to move.

[0013] In one of the embodiments, the synchronization mechanism further includes a communication module, which is communicatively connected to the adjustment module, and is used to receive an external closing instruction and output a working status and an abnormal signal of the adjustment module.

[0014] In one embodiment, the synchronization mechanism also includes a communication interface and a connecting line, the acquisition module, the adjustment module and the communication module are all communicatively connected to the communication interface, and plug-in parts are provided at both ends of the connecting line. The plug-in part at one end of the connecting line is plugged into the communication interface, and the plug-in part at the other end of the connecting line is used to be plugged into an external device.

[0015] In one embodiment, the synchronization mechanism also includes a storage module, and the acquisition module and the adjustment module are both communicatively connected to the storage module, and the storage module is used to store the preset difference between the voltage parameters of the working low-voltage bus and the low-voltage bus to be switched on and off under preset synchronization conditions.

[0016] In a second aspect, the utility model provides a low-voltage bus synchronization regulation system, the low-voltage bus synchronization regulation system comprising:

[0017] The first power supply mechanism comprises a working high-voltage busbar, a first incoming circuit breaker, a working low-voltage busbar, a first load, and a first connecting circuit breaker connected to the working low-voltage busbar in sequence;

[0018] The second power supply mechanism comprises a medium-voltage busbar to be switched on and off, a second incoming circuit breaker, a low-voltage busbar to be switched on and off, a second load, and a second connecting circuit breaker in communication with the low-voltage busbar to be switched on and off, which are sequentially connected;

[0019] The synchronization mechanism in any of the above schemes is arranged between the first incoming line circuit breaker and the second incoming line circuit breaker, or the synchronization mechanism is arranged between the first connecting circuit breaker and the second connecting circuit breaker.

[0020] In one of the embodiments, the low-voltage bus synchronization regulation system also includes a power supply, and the power supply is electrically connected to the synchronization mechanism.

[0021] The beneficial effects of the utility model are:

[0022] The utility model provides a synchronization mechanism and a low-voltage bus synchronization adjustment system, the synchronization mechanism includes a collection module and an adjustment module, when the low-voltage bus to be connected and disconnected needs to be switched from normal load to contact load or from contact load to normal load, the collection module collects voltage parameters of the working low-voltage bus and the low-voltage bus to be connected and disconnected, when the collection module detects that the voltage parameters of the working low-voltage bus and the low-voltage bus to be connected and disconnected meet the synchronization conditions, the adjustment module adjusts the first incoming line circuit breaker and the second incoming line circuit breaker to be turned on, or the adjustment module adjusts the first contact circuit breaker and the second contact circuit breaker to be turned on. The synchronization mechanism is arranged between the first incoming line circuit breaker and the second incoming line circuit breaker or between the first contact circuit breaker and the second contact circuit breaker to perform synchronization debugging operations, thereby reducing the power outage time of the downstream load during the switching operation mode of the low-voltage bus to be connected and disconnected in the nuclear power plant, and avoiding affecting the normal operation and debugging of the downstream load. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The internal structure of the synchronous mechanism in the embodiment of the utility model is shown in FIG. Figure 1 .

[0024] Figure 2 The internal structure of the synchronous mechanism in the embodiment of the utility model is shown in FIG. Figure 2 .

[0025] Figure 3 The connection diagram of the synchronous mechanism in the embodiment of the utility model is shown in FIG. Figure 1 .

[0026] Figure 4 The connection diagram of the synchronous mechanism in the embodiment of the utility model is shown in FIG. Figure 2 .

[0027] Figure 5 It is a structural schematic diagram of the low-voltage bus synchronous regulation system in an embodiment of the utility model.

[0028] In the figure:

[0029] 1. Synchronous mechanism; 11. Acquisition module; 12. Adjustment module; 13. Communication module; 14. Storage module; 15. Housing; 16. Movable parts; 17. Communication interface; 18. Connection line;

[0030] 2. First power supply mechanism; 21. Working medium voltage bus; 22. First incoming circuit breaker; 23. Working low voltage bus; 24. First load; 25. First connecting circuit breaker;

[0031] 3. Second power supply mechanism; 31. Medium voltage busbar to be switched on and off; 32. Second incoming circuit breaker; 33. Low voltage busbar to be switched on and off; 34. Second load; 35. Second connecting circuit breaker;

[0032] 4. Distributed control system. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] like Figure 1 and Figure 5 As shown, this embodiment provides a synchronization mechanism, which is used to synchronize the working low-voltage bus 23 and the low-voltage bus to be connected and disconnected 33. The working low-voltage bus 23 is provided with a first incoming circuit breaker 22 and a first connecting circuit breaker 25, and the low-voltage bus to be connected and disconnected 33 is provided with a second incoming circuit breaker 32 and a second connecting circuit breaker 35. The working low-voltage bus 23 and the low-voltage bus to be connected and disconnected 33 can be electrically connected through the first connecting circuit breaker 25 and the second connecting circuit breaker 35. The synchronization mechanism 1 includes a collection module 11 and an adjustment module 12. The collection module 11 is used to collect voltage parameters of the working low-voltage bus 23 and the low-voltage bus to be connected and disconnected 33, so as to determine whether the working low-voltage bus 23 and the low-voltage bus to be connected and disconnected 33 meet the synchronization conditions through the voltage parameters. The adjustment module 12 is communicatively connected to the acquisition module 11, and is used to receive voltage parameters of the working low-voltage bus 23 and the low-voltage bus 33 to be switched on and off and adjust the on-off state of the first incoming circuit breaker 22 and the second incoming circuit breaker 32, or adjust the on-off state of the first connecting circuit breaker 25 and the second connecting circuit breaker 35.

[0038] Among them, when the acquisition module 11 detects that the voltage parameters of the working low-voltage bus 23 and the low-voltage bus 33 to be turned on and off meet the synchronization conditions, the adjustment module 12 adjusts the first incoming circuit breaker 22 and the second incoming circuit breaker 32 to be turned on, or the adjustment module 12 adjusts the first connecting circuit breaker 25 and the second connecting circuit breaker 35 to be turned on.

[0039] With such a configuration, when the operating mode of the working low-voltage busbar 23 and the low-voltage busbar to be switched 33 is normal load, the first incoming circuit breaker 22 and the second incoming circuit breaker 32 are both turned on, the working low-voltage busbar 23 is powered by the first incoming circuit breaker 22, and the low-voltage busbar to be switched 33 is powered by the second incoming circuit breaker 32. When the operating mode of the working low-voltage busbar 23 and the low-voltage busbar to be switched 33 is interconnected load, the first interconnecting circuit breaker 25 and the second interconnecting circuit breaker 35 are both turned on, the working low-voltage busbar 23 is powered by the first interconnecting circuit breaker 25, and the low-voltage busbar to be switched 33 is powered by the second interconnecting circuit breaker 35.

[0040] When the low-voltage bus 33 to be connected and disconnected needs to be switched from normal load to interconnection load, the voltage parameters of the working low-voltage bus 23 and the low-voltage bus 33 to be connected and disconnected can be collected by the acquisition module 11. When the acquisition module 11 detects that the voltage parameters of the working low-voltage bus 23 and the low-voltage bus 33 to be connected and disconnected meet the synchronization conditions, the adjustment module 12 adjusts the first interconnection circuit breaker 25 and the second interconnection circuit breaker 35 to be turned on. At this time, the second incoming circuit breaker 32 can be disconnected, and the user can inspect and repair the medium-voltage bus 31 to be connected and disconnected upstream of the low-voltage bus 33 to be connected and disconnected. The low-voltage bus 33 to be connected and disconnected can be powered by the working medium-voltage bus 21 upstream of the working low-voltage bus 23. This switching operation reduces the power loss of the load downstream of the low-voltage bus 33 to be connected and disconnected.

[0041] When the low-voltage bus 33 to be connected and disconnected needs to be switched from interconnection load to normal load, that is, after the maintenance of the medium-voltage bus 31 to be connected and disconnected upstream of the low-voltage bus 33 to be connected and disconnected is completed, the voltage parameters of the working low-voltage bus 23 and the low-voltage bus 33 to be connected and disconnected can be collected by the acquisition module 11. When the acquisition module 11 detects that the voltage parameters of the working low-voltage bus 23 and the low-voltage bus 33 to be connected and disconnected meet the synchronization conditions, the adjustment module 12 adjusts the first incoming circuit breaker 22 and the second incoming circuit breaker 32 to be turned on. At this time, the second interconnection circuit breaker 35 can be disconnected, and the low-voltage bus 33 to be connected and disconnected can be powered by the medium-voltage bus 31 to be connected and disconnected upstream thereof. This switching operation reduces the power loss of the load downstream of the low-voltage bus 33 to be connected and disconnected.

[0042] The synchronization mechanism 1 of this embodiment is arranged between the first incoming line circuit breaker 22 and the second incoming line circuit breaker 32 or between the first connecting circuit breaker 25 and the second connecting circuit breaker 35 to perform synchronization debugging operations, thereby reducing the power outage time of the downstream load during the period when the low-voltage bus 33 of the nuclear power plant is switching the operating mode, avoiding affecting the normal operation and debugging of the downstream load, and solving the problem of the need for downstream load power outage for switching during the switching of the low-voltage bus operating mode in the related technology.

[0043] Among them, the method by which the acquisition module 11 collects the voltage parameters of the working low-voltage bus 23 and the low-voltage bus to be connected and disconnected 33 can be selected according to actual needs. For example, the acquisition module 11 can be configured as an oscilloscope, which can be respectively communicated with the working low-voltage bus 23 and the low-voltage bus to be connected and disconnected 33, so as to effectively detect the amplitude, frequency, phase angle and other voltage parameters of the working low-voltage bus 23 and the low-voltage bus to be connected and disconnected 33.

[0044] Alternatively, the acquisition module 11 may also include an amplitude detection unit, a frequency detection unit, and a phase angle detection unit. The amplitude detection unit is used to detect the amplitude of the working low-voltage bus 23 and the low-voltage bus 33 to be turned on and off. The amplitude detection unit can convert the effective value of the voltage in one cycle through the heat generated by the resistor based on the thermal effect principle, and then obtain the voltage amplitude. This is a prior art and will not be repeated again. The frequency detection unit is used to detect the frequency of the working low-voltage bus 23 and the low-voltage bus 33 to be turned on and off. The frequency detection unit can detect the frequency based on existing technologies such as electrical cycle counting or Fourier transform. The phase angle detection unit is used to detect the phase angle of the working low-voltage bus 23 and the low-voltage bus 33 to be turned on and off. The phase angle detection unit can detect the phase angle based on existing technologies such as voltage zero crossing detection or synchronous phasor measurement.

[0045] In addition, main contacts and electromagnet coils are provided in the first incoming line circuit breaker 22, the second incoming line circuit breaker 32, the first connecting circuit breaker 25, the second connecting circuit breaker 35 and other circuit breakers. The electromagnet coil is connected to the main contact. When the electromagnet coil is energized, suction is generated, which can adsorb the main contacts to close, and the circuit breaker is turned on and conductive; when the electromagnet coil is de-energized, the suction disappears, the main contacts open, the circuit breaker is disconnected, and it is not conductive. The adjustment module sends an electrical signal to the corresponding circuit breaker to adjust the on-off state of the corresponding circuit breaker by adjusting the electromagnet coil to be energized or de-energized. The structural principle of the circuit breaker is the existing technology and will not be repeated here.

[0046] like Figure 1 and Figure 5 As shown, in some embodiments, the first connecting circuit breaker 25 is configured as a normally-on connecting circuit breaker, that is, the first connecting circuit breaker 25 can maintain a conducting state, the acquisition module 11 and the adjustment module 12 are both connected to the second connecting circuit breaker 35 for communication, the acquisition module 11 is used to collect voltage parameters at both ends of the second connecting circuit breaker 35, and the adjustment module 12 is used to adjust the on-off state of the second connecting circuit breaker 35. With such a configuration, when the first connecting circuit breaker 25 is in the conducting state, the acquisition module 11 can obtain the voltage parameters of both the working low-voltage bus 23 and the low-voltage bus 33 to be turned on by collecting the voltage parameters at both ends of the circuit breaker at the second connecting circuit breaker 35. The adjustment module 12 adjusts the second connecting circuit breaker 35 to be turned on to switch the low-voltage bus 33 to be turned on to the connecting load, and the switching operation is fast and efficient, reducing the influence of the switching operation synchronization of the first connecting circuit breaker 25 and the second connecting circuit breaker 35 on the synchronization of the working low-voltage bus 23 and the low-voltage bus 33 to be turned on.

[0047] like Figure 1 and Figure 5As shown, in some embodiments, the first incoming circuit breaker 22 is configured as a normally-on incoming circuit breaker, that is, the first incoming circuit breaker 22 can maintain a conducting state, the acquisition module 11 and the adjustment module 12 are both communicatively connected to the second incoming circuit breaker 32, the acquisition module 11 is used to acquire the voltage parameters at both ends of the second incoming circuit breaker 32, and the adjustment module 12 is used to adjust the on-off state of the second incoming circuit breaker 32. With such a configuration, when the first incoming circuit breaker 22 is in the conducting state, the acquisition module 11 can acquire the voltage parameters of both the working low-voltage bus 23 and the low-voltage bus 33 to be turned on and off by acquiring the voltage parameters at both ends of the circuit breaker at the second incoming circuit breaker 32. The adjustment module 12 adjusts the second incoming circuit breaker 32 to be turned on to switch the low-voltage bus 33 to be turned on and off to normal load. The switching operation is fast and efficient, reducing the influence of the switching operation synchronization of the first incoming circuit breaker 22 and the second incoming circuit breaker 32 on the synchronization of the working low-voltage bus 23 and the low-voltage bus 33 to be turned on and off.

[0048] In some embodiments, the acquisition module 11 is used to collect the amplitude, frequency and phase angle of the voltage of the working low-voltage bus 23 and the low-voltage bus to be connected and disconnected 33. That is, when the acquisition module 11 detects that the amplitude of the voltage of the working low-voltage bus 23 and the low-voltage bus to be connected and disconnected 33 is within a preset amplitude difference range, the frequency is within a preset frequency difference range, and the phase angle is within a preset phase angle difference range, it can be determined that the working low-voltage bus 23 and the low-voltage bus to be connected and disconnected 33 meet the synchronization condition. At this time, the adjustment module 12 adjusts the first incoming circuit breaker 22 and the second incoming circuit breaker 32 to be turned on, or the adjustment module 12 adjusts the first connecting circuit breaker 25 and the second connecting circuit breaker 35 to be turned on.

[0049] For example, the voltages of the working low-voltage bus 23 and the low-voltage bus to be switched 33 have equal amplitudes, equal frequencies, and equal phase angles. The preset amplitude difference range, the preset frequency difference range, and the preset phase angle difference range can be preset according to the change trends of the working low-voltage bus 23 and the low-voltage bus to be switched 33, the signal transmission time between the acquisition module 11 and the adjustment module 12, and the switching action time of the two incoming circuit breakers and the two connecting circuit breakers, so as to improve the accuracy of the synchronous operation between the working low-voltage bus 23 and the low-voltage bus to be switched 33.

[0050] like Figures 2 to 4As shown, in some embodiments, the synchronization mechanism 1 also includes a shell 15 and a movable part 16. The acquisition module 11 and the adjustment module 12 are arranged in the shell 15. The movable part 16 is rotatably connected to the shell 15. The movable part 16 is used to drive the shell 15 to move, that is, the secondary wiring required by the acquisition module 11 and the adjustment module 12 can be integrated in the shell 15, and the movable part 16 allows the user to move the synchronization mechanism 1 smoothly in the factory so that it can be moved and installed to different locations in the factory to avoid damage to components such as the shell 15, the acquisition module 11 and the adjustment module 12 due to movement and bumping by personnel during use.

[0051] In this embodiment, the movable member 16 may be, but is not limited to, a universal wheel. A plurality of universal wheels may be provided, which has a simple structure and can drive the housing 15 to slide smoothly in multiple directions.

[0052] like Figures 2 to 4 As shown, in some embodiments, the synchronization mechanism 1 also includes a communication module 13, which is communicatively connected to the adjustment module 12. The communication module 13 is used to receive an external closing instruction and output the working status and abnormal signal of the adjustment module 12. With such a configuration, when synchronization operation is required, the user can send a closing instruction to the communication module 13 through an input structure such as a button or a distributed control system 4. After the adjustment module 12 obtains the closing instruction, it can further adjust the first incoming circuit breaker 22 and the second incoming circuit breaker 32 to be turned on, or adjust the first connecting circuit breaker 25 and the second connecting circuit breaker 35 to be turned on, according to whether the voltage parameters of the working low-voltage bus 23 and the low-voltage bus 33 to be turned on and off detected by the acquisition module 11 meet the synchronization conditions.

[0053] The working status and abnormal signal of the adjustment module 12 can also be output through the communication module 13 to interact with the external system. For example, the adjustment module 12 can communicate with the distributed control system 4 through the communication module 13. The communication module 13 can output the working status and abnormal signal of the adjustment module 12 to the distributed control system 4 for user monitoring and control instruction operation reference.

[0054] like Figures 4 to 5As shown, in some embodiments, the synchronization mechanism 1 also includes a communication interface 17 and a connecting line 18. The acquisition module 11, the adjustment module 12, the communication module 13 and the storage module 14 can all be connected to the communication interface 17 for communication. The two ends of the connecting line 18 are provided with plug-in parts. The plug-in part at one end of the connecting line 18 is plugged into the communication interface 17, and the plug-in part at the other end of the connecting line 18 is used to plug into an external device such as the second contact circuit breaker 35 or the second incoming circuit breaker 32. The plug-in part can be, but is not limited to, an aviation plug. In this embodiment, the acquisition module 11, the adjustment module 12, the communication module 13 and the storage module 14 are integrated and arranged in the synchronization mechanism 1, and are plugged into external devices through the communication interface 17 and the connecting line 18, which reduces the cumbersome wiring operations of the user and is simple to operate.

[0055] like Figures 2 to 4 As shown, in some embodiments, the synchronization mechanism 1 further includes a storage module 14, and the acquisition module 11 and the adjustment module 12 are both in communication connection with the storage module 14, and the storage module 14 is used to store the preset difference between the voltage parameters of the working low-voltage bus 23 and the low-voltage bus to be switched on and off 33 under the preset synchronization condition. When the voltage parameter difference between the working low-voltage bus 23 and the low-voltage bus to be switched on and off 33 is equal to the preset difference, the adjustment module 12 adjusts the first incoming line circuit breaker 22 and the second incoming line circuit breaker 32 to be turned on, or the adjustment module 12 adjusts the first connecting circuit breaker 25 and the second connecting circuit breaker 35 to be turned on.

[0056] Among them, under the synchronous condition, the preset difference between the voltage parameters of the working low-voltage bus 23 and the low-voltage bus 33 to be turned on and off can be preset according to the change trend of the working low-voltage bus 23 and the low-voltage bus 33 to be turned on and off, the signal transmission time between the acquisition module 11 and the adjustment module 12, and the on-off action time of the two incoming circuit breakers and the two connecting circuit breakers, so as to improve the accuracy of the synchronous operation between the working low-voltage bus 23 and the low-voltage bus 33 to be turned on and off. For example, the preset difference between the voltage parameters of the working low-voltage bus 23 and the low-voltage bus 33 to be turned on and off can be zero or a non-zero value. The synchronous mechanism 1 can use the relay principle to regulate the corresponding circuit breaker, that is, input the synchronous instruction to the synchronous mechanism 1. When the synchronous mechanism 1 detects through the acquisition module 11 that the voltage parameters of the working low-voltage bus 23 and the low-voltage bus 33 to be turned on and off meet the synchronous condition, the corresponding circuit breaker can be adjusted by the adjustment module 12 to close and conduct. Alternatively, the storage module 14 may also be configured as a controller, which can send action instructions to the regulating module 12 to control the regulating action of the regulating module 12 .

[0057] like Figures 1 to 5As shown, the embodiment of the second aspect of the present embodiment provides a low-voltage bus synchronization regulation system, the low-voltage bus synchronization regulation system includes a first power supply mechanism 2, a second power supply mechanism 3 and a synchronization mechanism 1 in any of the above schemes, the first power supply mechanism 2 includes a working medium-voltage bus 21, a first incoming circuit breaker 22, a working low-voltage bus 23, a first load 24, and a first connecting circuit breaker 25 connected in communication with the working low-voltage bus 23. The second power supply mechanism 3 includes a medium-voltage bus 31 to be connected and disconnected, a second incoming circuit breaker 32, a low-voltage bus 33 to be connected and disconnected, a second load 34, and a second connecting circuit breaker 35 connected in communication with the low-voltage bus 33 to be connected and disconnected. The synchronization mechanism 1 is arranged between the first incoming circuit breaker 22 and the second incoming circuit breaker 32, or the synchronization mechanism 1 is arranged between the first connecting circuit breaker 25 and the second connecting circuit breaker 35.

[0058] With such arrangement, when the low-voltage bus 33 to be connected and disconnected needs to be switched from normal load to connection load, the synchronization mechanism 1 can be installed at the second connection circuit breaker 35 or between the first connection circuit breaker 25 and the second connection circuit breaker 35, and the acquisition module 11 acquires the voltage parameters of both the working low-voltage bus 23 and the low-voltage bus 33 to be connected and disconnected. When the acquisition module 11 detects that the voltage parameters of both the working low-voltage bus 23 and the low-voltage bus 33 to be connected and disconnected meet the synchronization conditions, the adjustment module 12 adjusts the first connection circuit breaker 25 and the second connection circuit breaker 35 to be turned on. At this time, the second incoming circuit breaker 32 can be disconnected, and the user can inspect and repair the medium-voltage bus 31 to be connected and disconnected upstream of the low-voltage bus 33 to be connected and disconnected, and the low-voltage bus 33 to be connected and disconnected can be powered by the working medium-voltage bus 21. This switching operation reduces the power loss of the load downstream of the low-voltage bus 33 to be connected and disconnected.

[0059] When the low-voltage bus 33 to be connected and disconnected needs to be switched from interconnection load to normal load, the synchronization mechanism 1 can be installed to the second incoming circuit breaker 32 or between the first incoming circuit breaker 22 and the second incoming circuit breaker 32. The acquisition module 11 collects the voltage parameters of the working low-voltage bus 23 and the low-voltage bus 33 to be connected and disconnected. When the acquisition module 11 detects that the voltage parameters of the working low-voltage bus 23 and the low-voltage bus 33 to be connected and disconnected meet the synchronization conditions, the adjustment module 12 adjusts the first incoming circuit breaker 22 and the second incoming circuit breaker 32 to be turned on. At this time, the second interconnection circuit breaker 35 can be disconnected, and the low-voltage bus 33 to be connected and disconnected can be powered by the upstream medium-voltage bus 31 to be connected and disconnected. This switching operation reduces the power loss of the downstream load of the low-voltage bus 33 to be connected and disconnected.

[0060] The low-voltage busbar synchronization regulation system of this embodiment performs synchronization debugging operations by setting the synchronization mechanism 1 between the first incoming line circuit breaker 22 and the second incoming line circuit breaker 32 or between the first connecting circuit breaker 25 and the second connecting circuit breaker 35, thereby reducing the power outage time of the downstream load during the period when the nuclear power plant's low-voltage busbar 33 is switched to another operating mode, avoiding affecting the normal operation and debugging of the downstream load. The operation is simple, and the operating stability and reliability of the nuclear power plant's electrical system are improved. The system can be used for the synchronization and testing of the low-voltage busbars of nuclear power plants, conventional power plants and substations.

[0061] In some embodiments, the low-voltage bus synchronization regulation system also includes a power supply, which is electrically connected to the synchronization mechanism 1. The voltage of the power supply can be but is not limited to a 220V DC voltage. The power supply can supply power to the synchronization mechanism 1 when the synchronization mechanism 1 is working.

[0062] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A synchronization mechanism, used for synchronizing a working low-voltage busbar (23) and a low-voltage busbar (33) to be switched on and off, wherein the working low-voltage busbar (23) is provided with a first incoming circuit breaker (22) and a first connecting circuit breaker (25), and the low-voltage busbar (33) to be switched on and off is provided with a second incoming circuit breaker (32) and a second connecting circuit breaker (35), and the working low-voltage busbar (23) and the low-voltage busbar (33) to be switched on and off can be electrically connected through the first connecting circuit breaker (25) and the second connecting circuit breaker (35), characterized in that: The contemporaneous institutions include: A collection module (11), the collection module (11) is used to collect voltage parameters of the working low-voltage bus (23) and the low-voltage bus to be switched on and off (33); An adjustment module (12), the adjustment module (12) being in communication connection with the acquisition module (11), the adjustment module (12) being used to receive voltage parameters of both the working low-voltage bus (23) and the low-voltage bus (33) to be switched on and off and to adjust the on-off state of the first incoming circuit breaker (22) and the second incoming circuit breaker (32), or to adjust the on-off state of the first connecting circuit breaker (25) and the second connecting circuit breaker (35).

2. The synchronization mechanism according to claim 1, characterized in that: The first connecting circuit breaker (25) is configured as a normally-on connecting circuit breaker, and the acquisition module (11) and the adjustment module (12) are both communicatively connected to the second connecting circuit breaker (35).

3. The synchronization mechanism according to claim 1, characterized in that: The first incoming line circuit breaker (22) is configured as a normally-on incoming line circuit breaker, and the acquisition module (11) and the adjustment module (12) are both communicatively connected to the second incoming line circuit breaker (32).

4. The synchronization mechanism according to claim 1, characterized in that: The acquisition module (11) is used to acquire the amplitude, frequency and phase angle of the voltage of the working low-voltage bus (23) and the low-voltage bus (33) to be switched on and off.

5. The synchronization mechanism according to claim 1, characterized in that: The synchronization mechanism further comprises a shell (15) and a movable part (16); the acquisition module (11) and the adjustment module (12) are arranged in the shell (15); the movable part (16) is rotatably connected to the shell (15); and the movable part (16) is used to drive the shell (15) to move.

6. The synchronization mechanism according to claim 1, characterized in that: The synchronization mechanism further comprises a communication module (13), wherein the communication module (13) is communicatively connected with the regulating module (12), and the communication module (13) is used to receive an external closing instruction and output a working state and an abnormal signal of the regulating module (12).

7. The synchronization mechanism according to claim 6, characterized in that: The synchronization mechanism (1) further comprises a communication interface (17) and a connecting line (18); the acquisition module (11), the adjustment module (12) and the communication module (13) are all communicatively connected to the communication interface (17); both ends of the connecting line (18) are provided with plug-in parts; the plug-in part at one end of the connecting line (18) is plugged into the communication interface (17), and the plug-in part at the other end of the connecting line (18) is used for plugging into an external device.

8. The synchronization mechanism according to claim 1, characterized in that: The synchronization mechanism further comprises a storage module (14), the acquisition module (11) and the adjustment module (12) are both in communication connection with the storage module (14), and the storage module (14) is used to store a preset difference between voltage parameters of the working low-voltage bus (23) and the low-voltage bus (33) to be switched on and off under preset synchronization conditions.

9. A low voltage busbar synchronous regulation system, characterized in that: The low-voltage busbar synchronous regulation system comprises: A first power supply mechanism (2) comprises a working medium-voltage busbar (21), a first incoming circuit breaker (22), a working low-voltage busbar (23), a first load (24) connected in sequence, and a first connecting circuit breaker (25) communicatively connected to the working low-voltage busbar (23); The second power supply mechanism (3) comprises a medium-voltage busbar (31) to be switched on and off, a second incoming circuit breaker (32), a low-voltage busbar (33) to be switched on and off, a second load (34), and a second connecting circuit breaker (35) communicatively connected to the low-voltage busbar (33) to be switched on and off, which are sequentially connected; The synchronization mechanism (1) described in any one of claims 1 to 8, wherein the synchronization mechanism (1) is arranged between the first incoming circuit breaker (22) and the second incoming circuit breaker (32), or the synchronization mechanism (1) is arranged between the first connecting circuit breaker (25) and the second connecting circuit breaker (35).

10. The low voltage busbar synchronization regulation system according to claim 9, characterized in that: The low-voltage busbar synchronization regulation system also includes a power supply, which is electrically connected to the synchronization mechanism (1).

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