Voltage fluctuation suppression device and method

Abstract

The invention provides a voltage fluctuation suppression device and method, and relates to the technical field of automation equipment.The voltage fluctuation suppression device comprises a power input module, a first power utilization module, a second power utilization module, a third power utilization module and a suppression assembly; the power input module is electrically connected with the first power utilization module, the second power utilization module and the third power utilization module; a contactor is arranged between the second power utilization module and the power input module; and the suppression assembly is electrically connected with the contactor and is used for supplying power to the contactor. According to the voltage fluctuation suppression device and method, the technical problems of large occupied area and high cost of a voltage fluctuation suppression device in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automation equipment, and particularly relates to a voltage fluctuation suppression device and method. Background Art

[0002] Voltage fluctuation refers to the change of the supply voltage in the power system within a certain period of time. Its hazards are mainly manifested in that voltage fluctuation can cause faults such as increased noise of electrical equipment, loose connection terminals, insulation aging, and control failure; voltage fluctuation can cause problems such as production equipment shutdown and process control errors, affecting normal production. Usually, in the design process, to solve the voltage fluctuation problem, some measures need to be taken, such as installing power compensation devices such as capacitors, inductors, and voltage stabilizers; improving the operation level and management level of the power system to prevent faults during maintenance; strengthening voltage monitoring and control to detect and handle voltage fluctuation problems in a timely manner.

[0003] Currently, the design for the voltage drop in the power system needs to meet the Semi-F47 voltage drop standard. The standard solution in the industry is to increase voltage stabilizers, VSP devices, etc. By adding the above devices, the condition that the equipment can still operate stably when the voltage drops instantaneously can be basically met; however, in the actual project application, the above settings are basically not adopted because the cost of related voltage suppression devices is relatively high, which is not conducive to the cost control of the system. Moreover, VSP requires a certain amount of space, and some equipment has a small space, resulting in the inability to meet the requirements during the design stage. At the same time, the Semi-F47 design standard is not included in the industry standard specifications, and the voltage suppression part is omitted in the design stage of some equipment due to considering various factors.

[0004] Therefore, the existing technology needs to be further developed. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies and provide a voltage fluctuation suppression device and method to solve the technical problems of large floor area and high cost of the voltage fluctuation suppression device in the related technology.

[0006] To achieve the above technical purpose, the present invention takes the following technical solutions: A voltage fluctuation suppression device is provided, including a power input module, a first power consumption module, a second power consumption module, a third power consumption module, and a suppression component; the power input module is electrically connected to the first power consumption module, the second power consumption module, and the third power consumption module; a contactor is arranged between the second power consumption module and the power input module; the suppression component is electrically connected to the contactor, and the suppression component is used to supply power to the contactor.

[0007] Further, the contactor is an AC coil contactor; the suppression component is electrically connected to the third power-consuming module and the AC coil contactor, and the third power-consuming module is used to supply power to the AC coil contactor.

[0008] Further, the third power-consuming module includes an uninterruptible power supply device, which is used to supply power to the third power-consuming module and the AC coil contactor.

[0009] Further, the uninterruptible power supply device is used to supply power to the third power-consuming module.

[0010] Further, the first power-consuming module is a switching power supply; the second power-consuming module is a power system electrical device; the third power-consuming module is a control system electrical device.

[0011] Further, both the switching power supply and the power system electrical device have voltage fluctuation suppression functions.

[0012] Further, the contactor is a DC coil contactor; the suppression component is electrically connected to the first power-consuming module and the DC coil contactor, and the first power-consuming module is used to supply power to the DC coil contactor.

[0013] A voltage fluctuation suppression method is also provided, which uses the voltage fluctuation suppression device as described above. The voltage fluctuation suppression method includes: the power input module powers on the first power-consuming module, the second power-consuming module, and the third power-consuming module; the input voltage fluctuation value of the power input module is detected in real time; it is determined whether the input voltage fluctuation value exceeds a preset fluctuation threshold; if so, the suppression component starts to supply power to the contactor.

[0014] Further, the preset fluctuation threshold is specifically: when the voltage of the first power-consuming module, the second power-consuming module, and the third power-consuming module drops to 50% of the rated voltage, it lasts for 0.2 seconds; when the voltage drops to 70% of the rated voltage, it lasts for 0.5 seconds; when the voltage drops to 80%, it lasts for 1 second.

[0015] Further, the voltage fluctuation suppression method includes: determining the type of the contactor; if the contactor is a DC coil contactor, the suppression component supplies power to the contactor through the first power-consuming module; if the contactor is an AC coil contactor, the suppression component supplies power to the contactor through the uninterruptible power supply device, where the uninterruptible power supply device is electrically connected to the third power-consuming module.

[0016] Beneficial effects: 1. The voltage fluctuation suppression device of the present invention changes the power supply mode of the contactor through the suppression component, replacing the voltage fluctuation suppression device such as VSP in front of the contactor, and using the internal filter and corresponding protection devices to offset the influence of external voltage fluctuations on the weak current system. Therefore, there is no need to install a VSP device in the system, solving the technical problems of space occupation and high cost caused by installing the VSP device.

[0017] 2. The voltage fluctuation suppression device of the present invention realizes the replacement and optimization of some functions of VSP through the component ports. The components in VSP are replaced one by one through the attached functions of the remaining components, solving the problems of space occupation and high cost of VSP without affecting the stability of the voltage drop effect. Description of the drawings

[0018] Figure 1 is a schematic structural diagram of the voltage fluctuation suppression device adopted in the embodiment of the present invention; Figure 2 is a schematic structural diagram of the voltage fluctuation suppression device adopted in the first embodiment of the present invention; Figure 3 is a schematic structural diagram of the voltage fluctuation suppression device adopted in the second embodiment of the present invention; Figure 4 is a flowchart of the voltage fluctuation suppression method adopted in the embodiment of the present invention; Figure 5 is a schematic structural diagram of the voltage fluctuation suppression device adopted in the prior art; Figure 6 is a schematic diagram of the test results of the power supply side of the voltage fluctuation suppression device adopted in the embodiment of the present invention when the voltage drop amplitude is 80%; Figure 7 is a schematic diagram of the test results of the load side of the voltage fluctuation suppression device adopted in the embodiment of the present invention when the voltage drop amplitude is 80%; Figure 8 is a schematic diagram of the test results of the power supply side of the voltage fluctuation suppression device adopted in the embodiment of the present invention when the voltage drop amplitude is 70%; Figure 9 is a schematic diagram of the test results of the load side of the voltage fluctuation suppression device adopted in the embodiment of the present invention when the voltage drop amplitude is 70%; Figure 10 is a schematic diagram of the test results of the power supply side of the voltage fluctuation suppression device adopted in the embodiment of the present invention when the voltage drop amplitude is 50%; Figure 11 is a schematic diagram of the test results of the load side of the voltage fluctuation suppression device adopted in the embodiment of the present invention when the voltage drop amplitude is 50%. Detailed implementation manners

[0019] To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.

[0020] According to an embodiment of the present invention, a voltage fluctuation suppression device is provided. Please refer to Figures 1 to 8 , which includes a power input module, a first power consumption module, a second power consumption module, a third power consumption module, and a suppression component; the power input module is electrically connected to the first power consumption module, the second power consumption module, and the third power consumption module; a contactor is provided between the second power consumption module and the power input module; the suppression component is electrically connected to the contactor, and the suppression component is used to supply power to the contactor.

[0021] With the above settings, in this embodiment, the power consumption system is divided into three sections for the design of the voltage drop function, so that the power consumption system meets the semi-F47 standard. Among them, when there is a voltage fluctuation, the suppression component can offset the instability and volatility that occur when the power input module supplies power, achieving the technical effect of optimizing and replacing the relevant functions of the VSP. The voltage fluctuation suppression device (i.e., VSP) before the contactor is omitted, which not only achieves the effect of cost savings, but also solves the technical problem of the large space occupied by the VSP.

[0022] Refer to Figure 5 , in the prior art, usually a VSP device is installed between the power input module and the electrical equipment, and by adding the VSP device, the condition that the equipment can still operate stably when the voltage drops instantaneously can be basically met.

[0023] In the prior art, the main functions of the VSP are: 1. Voltage sag / surge detection and response: It can detect voltage drop events in the power supply network in real time and at high speed.

[0024] 2. Seamless energy injection / compensation: When a voltage sag is detected, the energy stored in itself is instantaneously injected into the power supply circuit of the protected electrical equipment.

[0025] 3. Dynamic voltage support: During the duration of the voltage sag, by precisely controlling the injected energy, the voltage at the input end of the protected equipment is maintained or lifted to the level required for its normal operation (for example, maintained above 85% or 90% of the rated voltage).

[0026] The functions of the VSP include: 1. Ensure the continuous and stable operation of key equipment: Its core function is to prevent sensitive electrical equipment from shutting down, tripping, and production interruption caused by an instantaneous drop in the grid voltage.

[0027] 2. Reduce production losses and downtime costs: By avoiding unplanned downtime of equipment caused by voltage sags, significantly reduce the downtime of the production line, reduce the scrap rate, and thus avoid huge economic losses.

[0028] 3. Protect equipment from damage: Prevent abnormal operation of equipment caused by voltage sags (such as motor stalling, contactor release, control system logic errors) from causing physical or functional damage to the equipment itself and extend the service life of the equipment.

[0029] In this embodiment, by suppressing the component to change the power supply mode of the contactor, it replaces voltage fluctuation suppression devices such as VSP in front of the contactor, and uses the internal filter and corresponding protection devices to offset the impact of external voltage fluctuations on the weak current system. Thus, there is no need to install a VSP device in the system, solving the technical problems of space occupation and high cost caused by installing a VSP device.

[0030] In the voltage fluctuation suppression device of this embodiment, the contactor is an AC coil contactor; the suppression component is electrically connected to the third electrical module, the suppression component is electrically connected to the AC coil contactor, and the third electrical module is used to supply power to the AC coil contactor.

[0031] Specifically, in this embodiment, the suppression component is used to connect the contactor and the third electrical module. When the input voltage of the power input module is unstable, the third electrical module supplies power to the contactor, thereby suppressing the voltage fluctuation of the system. Using the suppression component to replace the VSP device in the prior art makes the voltage fluctuation in the system meet the Semi-F47 standard, that is, it saves the space occupied by the system and saves the cost of installing a VSP device.

[0032] Specifically, the VSP device is a voltage sag protector.

[0033] In the voltage fluctuation suppression device of this embodiment, the third electrical module includes an uninterruptible power supply device, and the uninterruptible power supply device is used to supply power to the third electrical module and supply power to the AC coil contactor.

[0034] Preferably, the uninterruptible power supply device is a UPS battery.

[0035] Specifically, in this embodiment, the system uses an AC coil contactor for power supply. When the voltages of the AC coil contactors A1 and A2 fluctuate, the contactors will frequently engage and disengage, resulting in the disconnection of the power supply to the power system. As a result, the equipment will malfunction due to voltage fluctuations. Therefore, in this embodiment, the power supply for A1 and A2 of the AC coil contactor is provided by the UPS, so as to offset the instability and volatility of the voltage in the power supply system, achieving the technical effect of the VSP device in suppressing voltage fluctuations, enabling the equipment to meet the Semi-F47 standard, and ensuring the stable operation of the equipment.

[0036] In the voltage fluctuation suppression device of this embodiment, the uninterruptible power supply device is used to supply power to the third power consumption module.

[0037] Embodiment 1: See Figure 2 , in this embodiment, the power system uses an AC coil contactor for power supply.

[0038] When the voltages of the AC coil contactors A1 and A2 fluctuate, the contactors will frequently engage and disengage, resulting in the disconnection of the power supply to the power system, and further causing the equipment to malfunction due to voltage fluctuations. Therefore, in this embodiment, the UPS previously placed in the power system and the UPS used for the control system power supply are combined to form a suppression component. The power supply for A1 and A2 of the contactor is provided by the UPS in the third power consumption module. The suppression component is used to electrically connect the UPS and the AC coil contactor, so as to offset the instability and volatility of the voltage in the power supply system. In this way, the suppression component can not only suppress the voltage fluctuations generated by the power input module, but also optimize the adverse factors of the UPS at the power input module.

[0039] In the voltage fluctuation suppression device of this embodiment, the first power consumption module is a switching power supply; the second power consumption module is a power system electrical equipment; the third power consumption module is a control system electrical equipment.

[0040] Specifically, the first power consumption module is a general electrical equipment, and a typical one is a switching power supply. The first power consumption module is a key factor for providing 24V power supply to the entire system.

[0041] Preferably, the first power consumption module is a switching power supply with the Semi-F47 function, which can receive voltage fluctuations within a certain range and the output 24V voltage is not affected, thereby ensuring the stable operation of the equipment.

[0042] Specifically, the second power consumption module is a power system electrical equipment, such as actuators like servo motors and robots.

[0043] Preferably, under the condition of the same product performance, the power system electrical equipment with the built-in voltage drop protection function is preferentially selected.

[0044] Specifically, the third power consumption module is an electrical device for the control system, specifically including a PLC (Programmable Logic Controller), an HMI (Touch Screen), etc. Among them, the third power consumption module is protected by a UPS battery pack to avoid data loss in the case of a complete power outage of the device.

[0045] In the voltage fluctuation suppression device of this embodiment, both the switching power supply and the electrical device of the power system have voltage fluctuation suppression functions.

[0046] In the voltage fluctuation suppression device of this embodiment, the contactor is a DC coil contactor; the suppression component is electrically connected to the first power consumption module and the DC coil contactor, and the first power consumption module is used to supply power to the DC coil contactor.

[0047] Embodiment 2: See Figure 3 , in this embodiment, the contactor is a DC coil contactor, and in this embodiment, the suppression component is used to connect the first power consumption module and the DC coil contactor.

[0048] In this embodiment, the first power consumption module supplies power to the coil of the contactor, and the first power consumption module meets the output of the device with the voltage drop standard. When the power supply system fluctuates, the first power consumption module and the DC coil contactor that meet the voltage drop standard can offset the influence caused by the voltage drop to the greatest extent. Therefore, the voltage of the DC coil contactor coil will not be unstable. Therefore, the suppression component of this embodiment can offset the instability and volatility of the voltage in the power supply system, achieving the effect of suppressing voltage fluctuations.

[0049] In this way, through the design and combination of the power system in this embodiment, the related functions of the VSP can be optimized and replaced. Among them, the switching power supply of the first power consumption module is a switching power supply with the Semi-F47 function. Using its internal filter and corresponding protection devices (overvoltage, undervoltage, etc.), it offsets the influence of external voltage fluctuations on the weak current system. When the power supply voltage fluctuates, that is, when the AC-DC fluctuates, the corresponding PWM (Pulse Width Modulation) controller and its related protection functions come into effect, suppressing and compensating the fluctuations generated by the power grid, and realizing the stability of the voltage from the component end.

[0050] This embodiment also provides a voltage fluctuation suppression method. See Figure 4 , using the voltage fluctuation suppression device described in any one of the above, the voltage fluctuation suppression method includes: S100 The power input module supplies power to the first power consumption module, the second power consumption module, and the third power consumption module; S200 Real-time detect the input voltage fluctuation value of the power input module; S300 Determine whether the input voltage fluctuation value exceeds a preset fluctuation threshold; S400 If so, the suppression component starts to supply power to the contactor.

[0051] Adopting the above method, by setting the suppression component to change the power supply mode of the contactor, thereby making the voltage fluctuation of the contactor within the preset fluctuation threshold. In this way, not only can the voltage fluctuation of the system meet the Semi-F47 standard, but also there is no need to additionally install a VSP device, solving the technical problems of large floor area and high cost of the voltage fluctuation suppression device in the prior art.

[0052] In the voltage fluctuation suppression method of this embodiment, the preset fluctuation threshold is specifically: when the voltage of the first power consumption module, the second power consumption module, and the third power consumption module drops to 50% of the rated voltage, it maintains for 0.2 seconds; when the voltage of the first power consumption module, the second power consumption module, and the third power consumption module drops to 70% of the rated voltage, it maintains for 0.5 seconds; when the voltage of the first power consumption module, the second power consumption module, and the third power consumption module drops to 80%, it maintains for 1 second.

[0053] In the voltage fluctuation suppression method of this embodiment, the voltage fluctuation suppression method includes: S410 Determine the type of the contactor; S420 If the contactor is a DC coil contactor, the suppression component supplies power to the contactor through the first power consumption module; S430 If the contactor is an AC coil contactor, the suppression component supplies power to the contactor through an uninterruptible power supply device, where the uninterruptible power supply device is electrically connected to the third power consumption module.

[0054] Specifically, when the contactor is an AC coil contactor, fluctuations in the voltages of the AC coil contactors A1 and A2 will cause the contactor to frequently engage and disengage, which will further cause the power supply of the power system to be disconnected, and ultimately cause the device to crash due to voltage fluctuations; at this time, switching the power supply of A1 and A2 of the contactor to the UPS battery can offset the instability and volatility of the voltage in the power supply system, and in this embodiment, by combining the UPS in the original front-end power system with the UPS used for the control system power consumption, the adverse factors of the UPS at the power input module can also be optimized.

[0055] When the contactor is a DC coil contactor, in this embodiment, the first power consumption module is used to supply power to the DC coil contactor, and the coil of the DC coil contactor is powered by a switching power supply with 24V and meeting the Semi-F47 standard. In this way, when the power supply system fluctuates, the influence caused by the voltage drop can be offset to the greatest extent, and the DC coil contactor will not be unstable. Therefore, the instability and fluctuation of the voltage in the power supply system can be offset.

[0056] In this way, through the design and matching of the power system, the related functions of optimizing and replacing the VSP are realized. The switching power supply meeting the Semi-F47 standard uses the internal filter and corresponding protection devices (such as overvoltage, undervoltage, etc.) to offset the influence of external voltage fluctuations on the weak current system. When the supply voltage fluctuates, that is, when the AC-DC fluctuates, the corresponding PWM controller and its related protection functions come into effect to suppress and compensate for the fluctuations generated by the power grid, achieving voltage stability from the component end.

[0057] In specific practice, the voltage fluctuation suppression device of this embodiment was tested, and the test methods include: In the equipment power supply circuit (R\S\T), a voltage drop tester (VSS) is connected in series, and the output of the voltage drop test instrument is connected to the equipment power supply circuit, and then the fluctuation test of the voltage drop function is carried out on the voltage drop tester; Specifically, referring to Table 1, for the phases L / N, L / PE, N / PE, R / PE, S / PE, T / PE, R / S, S / T, R / T, at intervals of 10 seconds, the voltage drop amplitudes are 80%, 70%, 50%, and the stability of the equipment during operation is checked. If the equipment still operates normally and stably during the test, it means the result is passed.

[0058] Table 1: Test result table of voltage fluctuation suppression device Pressure drop amplitude Pressure drop time 50% 0.2s 70% 0.5s 80% 1s In the performance test of the voltage fluctuation suppression device of this embodiment, the test standard adopts SEMI F47-0706 "Specification for Semiconductor Processing Equipment Voltage Sag Immunity" The test equipment includes a programmable voltage sag generator (meeting the accuracy of IEC 61000-4-34 Class 2) and a power quality analyzer (accuracy ≥ Class A, compliant with IEC61000-4-30) The test environment is that the equipment is in the rated load operation state (such as actual working conditions of wafer processing, transmission, etc.), where the ambient temperature is 25°C ±5°C (meeting the SEMI S2 environmental requirements) Table 2: Test Results Table with a Pressure Drop Amplitude of 50%

[0059] Table 3: Test Results Table with a Pressure Drop Amplitude of 70%

[0060] Table 4: Test Results Table with a Pressure Drop Amplitude of 80%

[0061] See Figures 6 - 11 As well as Tables 2 - 4, from the test results, the test results of the circuit system in this embodiment are all passed when the pressure drop amplitudes are 50%, 70%, and 80%. Therefore, such a setting can meet the Semi - F47 pressure drop test index.

[0062] Specifically, as Figure 6 shown, it is the input voltage waveform on the power supply side of the machine - side phase L1 - L2, with a remaining voltage change amplitude of 80%, a phase lead of 0°, and a power supply time continuously fluctuating for 1000 ms, and the gap maintains the maximum voltage up to 300 V to supply the load end of the device.

[0063] As Figure 7 shown, it is the voltage waveform feedback by the device on the load side of the machine - side phase L1 - L2, with a remaining voltage change amplitude of 80%, a phase lead of 0°, and a test time of 1000 ms. Regardless of how the input voltage fluctuates, the voltage at the load port can still maintain stable operation at about 208 V, and the final test result is judged as Pass (stable operation).

[0064] As Figure 8 shown, it is the input voltage waveform on the power supply side of the machine - side phase L1 - L2, with a remaining voltage change amplitude of 70%, a phase lead of 0°, and a power supply time continuously fluctuating for 500 ms, and the gap maintains the maximum voltage up to 300 V to supply the load end of the device.

[0065] As Figure 9 shown, it is the voltage waveform feedback by the device on the load side of the machine - side phase L1 - L2, with a remaining voltage change amplitude of 70%, a phase lead of 0°, and a test time of 500 ms. Regardless of how the input voltage fluctuates, the voltage at the load port can still maintain stable operation at about 208 V, and the final test result is judged as Pass (stable operation).

[0066] As Figure 10 shown, it is the input voltage waveform on the power supply side of the machine - side phase L1 - L2, with a remaining voltage change amplitude of 50%, a phase lead of 0°, and a power supply time continuously fluctuating for 200 ms, and the gap maintains the maximum voltage up to 300 V to supply the load end of the device.

[0067] As shown Figure 11 in the figure, for the load side of the phase L1-L2 at the machine end, the change amplitude of the residual voltage is 50%, the phase lead is 0°, the test time is 200 ms, and the voltage waveform feedback by the device. Regardless of the fluctuation of the input voltage, the load port can still maintain the stable operation of the device, and the final test result is judged as Pass (stable operation).

[0068] It should be noted that the terms "first", "second", etc. in the specification, claims and above-mentioned drawings of the present application are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order different from those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0069] Optionally, the specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0070] The serial numbers of the above embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0071] In the above embodiments of the present application, the descriptions of each embodiment have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0072] The above is only the preferred embodiment of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A voltage fluctuation suppression device, characterized in that, It includes a power input module, a first power-consuming module, a second power-consuming module, a third power-consuming module, and a suppression component; The power input module is electrically connected to the first power-consuming module, the second power-consuming module, and the third power-consuming module; A contactor is provided between the second power-consuming module and the power input module; The suppression component is electrically connected to the contactor, and the suppression component is used to supply power to the contactor.

2. The voltage fluctuation suppression device according to claim 1, characterized in that The contactor is an AC coil contactor; The suppression component is electrically connected to the third power-consuming module and the AC coil contactor, and the third power-consuming module is used to supply power to the AC coil contactor.

3. The voltage fluctuation suppression device according to claim 2, wherein The third power-consuming module includes an uninterruptible power supply device, which is used to supply power to the third power-consuming module and the AC coil contactor.

4. The voltage fluctuation suppression device according to claim 3, characterized in that, The uninterruptible power supply device is used to supply power to the third power-consuming module.

5. The voltage fluctuation suppression device according to claim 2, characterized in that, The first power-consuming module is a switching power supply; the second power-consuming module is a power system electrical device; the third power-consuming module is a control system electrical device.

6. The voltage fluctuation suppression device according to claim 5, characterized in that, Both the switching power supply and the power system electrical device have a voltage fluctuation suppression function.

7. The voltage fluctuation suppression device according to claim 1, wherein The contactor is a DC coil contactor; The suppression component is electrically connected to the first power-consuming module and the DC coil contactor, and the first power-consuming module is used to supply power to the DC coil contactor.

8. A voltage fluctuation suppression method, which uses the voltage fluctuation suppression device according to any one of claims 1-7, characterized in that, The voltage fluctuation suppression method includes: The power input module powers on the first power-consuming module, the second power-consuming module, and the third power-consuming module; Real-time detect the input voltage fluctuation value of the power input module; Judge whether the input voltage fluctuation value exceeds a preset fluctuation threshold; If so, the suppression component starts to supply power to the contactor.

9. The voltage fluctuation suppression method according to claim 8, wherein The specific preset fluctuation threshold is: The first power-consuming module, the second power-consuming module, and the third power-consuming module maintain for 0.2 seconds when the voltage drops to 50% of the rated voltage; The first power-consuming module, the second power-consuming module, and the third power-consuming module maintain for 0.5 seconds when the voltage drops to 70% of the rated voltage; The first power-consuming module, the second power-consuming module, and the third power-consuming module maintain for 1 second when the voltage drops to 80%.

10. The voltage fluctuation suppression method according to claim 9, characterized in that: The voltage fluctuation suppression method includes: Judge the type of the contactor; If the contactor is a DC coil contactor, the suppression component supplies power to the contactor through the first power-consuming module; If the contactor is an AC coil contactor, the suppression component supplies power to the contactor through the uninterruptible power supply device, where the uninterruptible power supply device is electrically connected to the third power-consuming module.

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