Condensation protection control method and device, high-voltage frequency converter and storage medium

Abstract

The invention discloses a condensation protection control method and device, a high-voltage frequency converter and a storage medium, and relates to the technical field of frequency converters, and the method comprises the steps: obtaining a condensation detection signal of the high-voltage frequency converter; when it is determined that the condensation phenomenon exists in the high-voltage frequency converter according to the condensation detection signal, the high-voltage closing state of the high-voltage frequency converter is determined; under the condition that the high-voltage switching-on state is switched on, the current dehumidification suppression condition of the high-voltage frequency converter is determined according to the fault detection signal of the high-voltage frequency converter; and if the dehumidification suppression condition is that the dehumidification means is not enough to suppress condensation, controlling the high-voltage frequency converter to execute high-voltage tripping. According to the invention, condensation protection is provided for the high-voltage frequency converter, and irreversible damage caused by high voltage on the high-voltage frequency converter in a condensation state is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of frequency converters, and in particular to a condensation protection control method, equipment, a high-voltage frequency converter, and a storage medium. Background Art

[0002] In the related art, when high-voltage inverters are not powered on, due to their small heat capacity and strong thermal conductivity, condensation is easily generated when the external temperature changes. There are many risks when high-voltage inverters are powered on or condensation is generated when high-voltage inverters are powered on in a condensed state, which can easily cause high-voltage inverter failures and even cause the high-voltage inverter to explode in severe cases. However, the current fault protection mechanism for high-voltage inverters does not introduce a protection method for condensation. Therefore, providing condensation protection for high-voltage inverters is a technical problem that needs to be solved urgently. Summary of the invention

[0003] The main purpose of the present application is to provide a condensation protection control method, device, high-voltage inverter and storage medium, aiming to solve the technical problem that the high-voltage inverter in the related art does not have condensation protection.

[0004] To achieve the above objectives, the present application proposes a condensation protection control method, comprising:

[0005] Obtain condensation detection signal of high voltage inverter;

[0006] When it is determined according to the condensation detection signal that condensation exists in the high-voltage inverter, the high-voltage closing state of the high-voltage inverter is determined;

[0007] When the high voltage closing state is closed, the high voltage inverter is controlled to perform high voltage tripping according to a fault detection signal of the high voltage inverter;

[0008] When the high voltage closing state is not closed, the closing action of the high voltage inverter is blocked.

[0009] In one embodiment, controlling the high-voltage frequency converter to perform high-voltage tripping according to a fault detection signal of the high-voltage frequency converter includes:

[0010] Determine the current dehumidification suppression condition of the high-voltage inverter according to the fault detection signal of the high-voltage inverter; the dehumidification suppression condition includes that the dehumidification means are sufficient to suppress condensation or the dehumidification means are insufficient to suppress condensation;

[0011] If the dehumidification suppression condition is that the dehumidification means are not sufficient to suppress condensation, the high-voltage inverter is controlled to perform a high-voltage trip;

[0012] If the dehumidification suppression condition is such that the dehumidification means are sufficient to suppress condensation, a condensation alarm is issued.

[0013] In one embodiment, determining the current dehumidification suppression status of the high-voltage inverter according to the fault detection signal of the high-voltage inverter includes:

[0014] Dehumidify the high-voltage inverter through the working heat of the high-voltage inverter to suppress condensation of the high-voltage inverter;

[0015] Obtain fault detection signals of high-voltage inverters in real time;

[0016] determining the current dehumidification suppression status of the high voltage inverter according to the fault detection signal;

[0017] If the dehumidification suppression condition is that the dehumidification means are sufficient to suppress condensation, a condensation alarm is issued, including:

[0018] If the dehumidification suppression condition is that the dehumidification means are sufficient to suppress condensation, a condensation alarm is issued, and the high-voltage inverter is controlled to keep working to continue dehumidifying the high-voltage inverter.

[0019] In one embodiment, the frequency conversion cabinet where the high-voltage frequency converter is located is provided with a fan;

[0020] Dehumidify the high-voltage inverter through the working heat of the high-voltage inverter to suppress condensation of the high-voltage inverter, including:

[0021] Control fan operation;

[0022] Dehumidify the high-voltage inverter through the working heat of the high-voltage inverter and the working heat dissipation of the fan to suppress condensation of the high-voltage inverter;

[0023] If the dehumidification suppression condition is that the dehumidification means are sufficient to suppress condensation, a condensation alarm is issued, including:

[0024] If the dehumidification suppression condition is that the dehumidification means are sufficient to suppress condensation, a condensation alarm is issued, and the high-voltage inverter is controlled to keep working and / or the fan is controlled to keep working to continue dehumidifying the high-voltage inverter.

[0025] In one embodiment, the frequency conversion cabinet where the high-voltage frequency converter is located is provided with a fan and a heater;

[0026] If the dehumidification suppression condition is that the dehumidification means are insufficient to suppress condensation, after the step of controlling the high-voltage inverter to perform high-voltage tripping, the condensation protection control method further includes:

[0027] Block the closing action of the high-voltage inverter and control the operation of the fan and / or the heater to dehumidify the high-voltage inverter;

[0028] When the dehumidification time of the high-voltage inverter reaches the preset time, it is determined whether condensation still exists in the high-voltage inverter according to the condensation detection signal;

[0029] If there is no condensation on the high-voltage inverter, the closing action of the high-voltage inverter will be unlocked to enable the high-voltage inverter to work normally;

[0030] If condensation still exists in the high-voltage inverter, a fault alarm will be issued.

[0031] In one embodiment, the frequency conversion cabinet where the high-voltage frequency converter is located is provided with a fan and a heater;

[0032] When the high voltage closing state is not closed, the closing action of the high voltage inverter is blocked, including:

[0033] When the high voltage closing state is not closed, the closing action of the high voltage inverter is blocked, and the fan and / or heater are controlled to work to dehumidify the high voltage inverter;

[0034] When the dehumidification time of the high-voltage inverter reaches the preset time, it is determined whether condensation still exists in the high-voltage inverter according to the condensation detection signal;

[0035] If there is no condensation on the high-voltage inverter, the closing action of the high-voltage inverter will be unlocked to enable the high-voltage inverter to work normally;

[0036] If condensation still exists in the high-voltage inverter, a fault alarm will be issued.

[0037] In one embodiment, the high-voltage inverter includes a transformer module and a power module, and the fault detection signal includes a current abnormality signal, a temperature and humidity abnormality signal of the transformer module, and / or an operation abnormality signal of the power module;

[0038] The current dehumidification suppression condition of the high-voltage inverter is determined according to the fault detection signal of the high-voltage inverter, including:

[0039] When the whole machine input current of the high voltage inverter is not within the preset current threshold range, a current abnormality signal is generated;

[0040] When the real-time temperature and humidity of the transformer module are not within the preset temperature and humidity threshold range, a temperature and humidity abnormality signal is generated;

[0041] When the power module has input phase loss, input voltage abnormality, overcurrent fault, overvoltage fault and / or undervoltage fault, an operation abnormality signal is generated;

[0042] If an abnormal current signal, an abnormal temperature and humidity signal, or an abnormal operation signal is obtained, it is determined that the current dehumidification suppression condition of the high-voltage inverter is that the dehumidification means are insufficient to suppress condensation;

[0043] If any abnormal signal among the abnormal current signal, the abnormal temperature and humidity signal, and the abnormal operation signal is not obtained, it is determined that the current dehumidification suppression condition of the high-voltage inverter is that the dehumidification means are sufficient to suppress condensation.

[0044] In one embodiment, a condensation detection device is provided in a frequency conversion cabinet where a high-voltage frequency converter is located. The condensation detection device includes a condensation substrate and a condensation detection board. Two groups of printed wires are arranged at intervals on the surface of the condensation substrate. The two groups of printed wires are connected to the condensation detection board.

[0045] Obtain the condensation detection signal of the high-voltage inverter, including:

[0046] The equivalent dielectric constant between the two groups of printed lines is converted into a voltage signal through the condensation detection board, and a condensation detection signal is generated according to the voltage signal;

[0047] Receive the condensation detection signal output by the condensation detection board.

[0048] In one embodiment, the condensation detection device further includes an auxiliary radiator, which is disposed on one side of the condensation substrate and is in close contact with the condensation substrate, and the condensation substrate is an aluminum plate.

[0049] In addition, to achieve the above objectives, the present application also proposes a condensation protection control device, including: a memory, a processor, and a computer program stored in the memory and running on the processor, the computer program is configured to implement the steps of the condensation protection control method as described above.

[0050] In addition, to achieve the above purpose, the present application also proposes a high-voltage frequency converter, comprising:

[0051] Transformer module;

[0052] Power modules; and

[0053] The main control module is connected to the transformer module and the power module respectively, and is used to implement the steps of the condensation protection control method as described above.

[0054] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, which is a computer-readable storage medium. A computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the condensation protection control method as described above are implemented.

[0055] One or more technical solutions proposed in this application have at least the following technical effects:

[0056] A condensation protection control method is proposed. When it is determined that condensation exists in the high-voltage frequency converter according to a condensation detection signal, the high-voltage closing state of the high-voltage frequency converter is determined. When the high-voltage closing state is closed, the high-voltage frequency converter is controlled to perform high-voltage tripping according to a fault detection signal of the high-voltage frequency converter, so as to provide condensation protection for the high-voltage frequency converter. When the high-voltage closing state is not closed, the closing action of the high-voltage frequency converter is blocked, so as to provide condensation power-on protection for the high-voltage frequency converter. Based on the high-voltage closing state of the high-voltage frequency converter, the method can identify the phenomenon of condensation generated by the high-voltage frequency converter in the high-voltage energized state, so as to perform high-voltage tripping and achieve condensation protection. It can also identify the phenomenon of condensation generated by the high-voltage frequency converter in the non-powered state, so as to block the closing, so as to avoid irreversible damage caused by high-voltage power supply of the high-voltage frequency converter in the condensation state. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0058] Figure 1 A schematic diagram of a flow chart of a first embodiment of a condensation protection control method provided in the present application;

[0059] Figure 2 A schematic diagram of the front view of the structure of the condensation detection device provided in an embodiment of the present application;

[0060] Figure 3 A schematic diagram of the right side structure of the condensation detection device provided in an embodiment of the present application;

[0061] Figure 4 A schematic diagram of the top view of the condensation detection device provided in an embodiment of the present application;

[0062] Figure 5 A bottom-up structural schematic diagram of a condensation detection device provided in an embodiment of the present application;

[0063] Figure 6 A schematic diagram of the cross-sectional structure of a condensation detection device provided in an embodiment of the present application;

[0064] Figure 7 A flowchart of an application example of the condensation protection control method provided in an embodiment of the present application;

[0065] Figure 8 A schematic diagram of the functional module connection of the high-voltage inverter provided in an embodiment of the present application;

[0066] Fig. 9This is a schematic diagram of the hardware structure of the condensation protection control device involved in the embodiment of the present application.

[0067] Description of Figure Numbers:

[0068] 1. Condensation substrate; 2. Condensation detection board; 3. Auxiliary radiator; 4. Fixing device; 5. Mounting bracket.

[0069] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0070] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0071] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0072] In the related art, when high-voltage inverters are not powered on, due to their small heat capacity and strong thermal conductivity, condensation is easily generated when the external temperature changes; and during operation, water ingress or condensation may also occur due to the environment or accidental spraying. When the above-mentioned condensation or water ingress occurs, the insulation of electrical components such as transformers or power units in the high-voltage inverter will be reduced, and even short circuits may occur, which will also cause problems such as corrosion and rust of metal components. Therefore, there are many risks in the high-voltage inverter being powered on in a condensed state or generating condensation in a high-voltage powered state. If high-voltage electricity is supplied in a condensed state, leakage current may increase, which may easily cause high-voltage inverter failure, and even risk of explosion; and condensation may occur in a high-voltage powered state, which may cause the high-voltage inverter failure to expand, causing more failures, and even causing the high-voltage inverter to explode in severe cases.

[0073] Therefore, it is necessary to propose condensation protection and water ingress protection for high-voltage inverters. However, the current fault protection mechanism for high-voltage inverters does not introduce a protection method for condensation. Therefore, providing condensation protection for high-voltage inverters is a technical problem that needs to be solved urgently.

[0074] In view of the above problems, the main solutions proposed in the embodiments of the present application are:

[0075] Acquire a condensation detection signal from the high-voltage inverter; when it is determined according to the condensation detection signal that condensation exists in the high-voltage inverter, determine the high-voltage closing state of the high-voltage inverter; when the high-voltage closing state is closed, control the high-voltage inverter to perform high-voltage tripping according to the fault detection signal of the high-voltage inverter; when the high-voltage closing state is not closed, block the closing action of the high-voltage inverter.

[0076] The solution provided by the embodiment of the present application is to determine the high-voltage closing state of the high-voltage inverter when it is determined that condensation exists in the high-voltage inverter according to the condensation detection signal, and when the high-voltage closing state is closed, control the high-voltage inverter to perform high-voltage tripping according to the fault detection signal of the high-voltage inverter, so as to provide condensation protection for the high-voltage inverter; and to block the closing action of the high-voltage inverter when the high-voltage closing state is not closed, so as to provide condensation power-on protection for the high-voltage inverter; based on the high-voltage closing state of the high-voltage inverter, this method can identify the phenomenon of condensation generated by the high-voltage inverter in the high-voltage energized state, so as to perform high-voltage tripping and achieve condensation protection, and can also identify the phenomenon of condensation generated by the high-voltage inverter in the non-powered state, so as to block the closing, so as to avoid irreversible damage to the high-voltage inverter caused by high voltage power supply in the condensation state.

[0077] In this embodiment, for the convenience of description, the following description is made by taking the condensation protection control device or the main control module in the high-voltage inverter as the execution subject.

[0078] It should be noted that the condensation protection control device is a computing service device with data processing, network communication and program running functions, such as a server, a network terminal, a PC (Personal Computer), an embedded computer, an industrial computer, etc., or an electronic device capable of realizing the above functions, such as a mobile phone, a tablet computer, a laptop computer, etc. The following takes the condensation protection control device as an example and describes the embodiment of the present application and the following embodiments in conjunction with the accompanying drawings.

[0079] The present application embodiment provides a condensation protection control method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the condensation protection control method of the present application. In this embodiment, the condensation protection control method includes steps S10 to S40:

[0080] Step S10, obtaining a condensation detection signal of a high-voltage inverter.

[0081] It should be noted that the high-voltage frequency converter can be installed in the frequency converter cabinet, and other equipment or components can also be installed in the frequency converter cabinet to ensure the normal operation of the frequency converter cabinet and the effective control of the motor, such as the connection terminals for connecting the high-voltage frequency converter and the motor, the circuit breaker for protecting the motor, the fan for extracting heat from the frequency converter cabinet to dissipate the heat of the frequency converter cabinet, the heater for heating the inside of the frequency converter cabinet to dehumidify the frequency converter cabinet, etc., which are not specifically limited here.

[0082] It should also be noted that the condensation detection signal refers to the detection signal obtained by detecting whether there is condensation or water ingress in the high-voltage inverter. The condensation detection signal can be obtained by a condensation detection device set in the inverter cabinet, or by other equipment after obtaining relevant parameters of the inverter cabinet (such as temperature and humidity), which is not specifically limited here.

[0083] In this embodiment, when the condensation protection control device obtains the condensation detection signal, it can obtain the condensation detection signal by directly receiving the output of the condensation detection device, or it can collect relevant parameters at a specified position in the high-voltage inverter or frequency conversion cabinet to determine whether condensation or water ingress exists, thereby generating the condensation detection signal.

[0084] In the related art, the condensation detection work in the frequency conversion cabinet is usually done by manual regular inspection or monitoring of the temperature and humidity in the cabinet, and the cabinet is shut down for dehumidification when the humidity is high. However, this manual condensation detection method cannot guarantee the effectiveness and timeliness of condensation detection. Moreover, the high humidity in the frequency conversion cabinet is not a one-to-one relationship with the presence of condensation, because the generation of condensation is also related to many other factors, such as temperature changes, components in the air, dust, shape and hydrophobicity on the surface of objects that are prone to condensation, etc., especially in some unexpected situations, the high-voltage frequency converter may be sprayed and cause water ingress, which is difficult to detect only by humidity. Therefore, the condensation detection in the related art has problems such as poor effectiveness and timeliness, inaccurate detection due to many influencing factors, and inability to detect water ingress to the frequency converter.

[0085] In a feasible implementation manner, a condensation detection device is provided in a frequency conversion cabinet where the high-voltage frequency converter is located.

[0086] Reference Figure 2-Figure 6 , Figure 2 It is a front view structural diagram of the condensation detection device. Figure 3 It is a right view structural diagram of the condensation detection device. Figure 4 is a schematic diagram of the top view of the condensation detection device. Figure 5 It is a schematic diagram of the structure of the condensation detection device viewed from above. Figure 6 It is a schematic diagram of the cross-sectional structure of a condensation detection device; the condensation detection device may include a condensation substrate 1 and a condensation detection board 2, and two groups of printed lines are arranged on the surface of the condensation substrate 1 at intervals, and the two groups of printed lines are connected to the condensation detection board 2.

[0087] It should be noted that the condensation substrate 1 refers to a plate-like structure on which water vapor in the environment can condense into liquid water when encountering temperature changes; the condensation detection board 2 refers to a device that can detect whether there is condensation on the condensation substrate 1. The two groups of printed wires arranged at intervals on the surface of the condensation substrate 1 can be in a grid shape, interlaced but not connected. When condensation occurs on the surface of the condensation substrate 1, the equivalent dielectric constant between the two groups of printed wires will decrease. The two groups of printed wires can be connected to the condensation detection board 2 through external terminals so that the condensation detection board 2 can detect the equivalent dielectric constant between the two groups of printed wires. The condensation detection board 2 can convert the equivalent dielectric constant into a voltage signal, and then make a judgment based on the voltage signal to detect whether there is condensation on the condensation substrate 1, thereby obtaining a detection result of whether condensation occurs in the environment where the condensation detection device is located, that is, the frequency conversion cabinet, and the detection result can be output.

[0088] Correspondingly, in the condensation protection control method, step S10 may include steps S11 to S12:

[0089] Step S11, converting the equivalent dielectric constant between the two groups of printed lines into a voltage signal through the condensation detection board 2, and generating a condensation detection signal according to the voltage signal;

[0090] Step S12, receiving the condensation detection signal output by the condensation detection board 2.

[0091] It should be noted that after the condensation detection board 2 detects the equivalent dielectric constant between the two groups of printed lines on the condensation substrate 1, it converts it into a voltage signal, and then judges based on the voltage signal and the preset voltage threshold or the preset voltage threshold value to obtain a detection result of whether condensation exists on the condensation substrate 1 or whether condensation does not exist on the condensation substrate 1. Then, a high-level or low-level condensation detection signal can be generated according to the detection result, and the condensation detection signal can be sent to the subsequently connected condensation protection control device so that the condensation protection control device receives the condensation detection signal accordingly.

[0092] In some embodiments, after the condensation detection board 2 obtains the voltage signal, it can also amplify the voltage signal, and use the amplified voltage signal and the preset voltage threshold or preset voltage threshold value to make a judgment to generate a corresponding condensation detection signal. Amplifying the voltage signal and then making a judgment can achieve a more accurate voltage comparison and obtain a more accurate condensation detection result, thereby improving the control accuracy of the condensation protection control method.

[0093] In some embodiments, the condensation detection board 2 can be configured with an expansion port to detect the equivalent dielectric constant of multiple condensation substrates 1, and multiple condensation detection boards 2 can also be connected to the condensation protection control device, and correspondingly, the condensation protection control device can receive the condensation detection signal sent by one or more condensation detection boards 2. Among them, the outputs of multiple condensation detection boards 2 can be connected in series or in parallel, so as to perform condensation detection on multiple points in the frequency conversion cabinet without occupying too many interface resources. For example, when a series connection is adopted, if one condensation detection board 2 detects that the condensation is pulled low, the overall output will be pulled low, and the condensation protection control device can start the condensation protection control; for another example, when a parallel connection is adopted, if one condensation detection board 2 detects that the condensation is pulled high, the overall output will be pulled high, and the condensation protection control device can start the condensation protection control. It should be noted that in actual applications, series or parallel connection can be selected as needed, or the condensation detection board 2 can be selected to output the condensation detection signal at a high level or a low level when condensation is detected, or the condensation protection control device can be selected to start the condensation protection control according to the high level or the low level when the condensation detection signal is received, which is not specifically limited in this embodiment.

[0094] In this embodiment, the proposed condensation detection device converts the equivalent dielectric constant between two groups of printed lines set on the condensation substrate into a voltage signal through a condensation detection board, and then generates a condensation detection signal to directly detect whether condensation is generated in the frequency converter cabinet, so that the condensation protection control device can quickly obtain the condensation detection signal, so as to implement condensation protection or start condensation removal measures more quickly and accurately in the future, effectively solving the problems of poor effectiveness and timeliness of condensation detection in related technologies, inaccurate detection due to many influencing factors, and inability to detect water ingress to the frequency converter.

[0095] In the related art, some condensation detection devices that directly measure condensation, due to the poor thermal conductivity and large heat melting of the detection material, may be more difficult to condense than the metal components in the frequency converter cabinet, and cannot accurately reflect the condensation situation of the high-voltage frequency converter. Therefore, the condensation detection device in the related art has the problem of poor detection accuracy.

[0096] In another possible implementation, continue to refer to Figure 2-Figure 6 The condensation detection device may further include an auxiliary radiator 3, which is disposed on one side of the condensation substrate 1 and is closely attached to the condensation substrate 1, and the condensation substrate 1 is an aluminum plate.

[0097] It should be noted that the main material of the condensation substrate 1 is an aluminum plate, which has better thermal conductivity and lower heat capacity than ordinary ceramic plates, thick copper plates and other PCB boards (Printed Circuit Boards), and its surface is more prone to condensation, which facilitates the condensation detection device to timely and accurately detect the condensation phenomenon in the frequency conversion cabinet, so as to provide condensation protection for the high-voltage frequency converter in time. The auxiliary heat sink 3 is close to the condensation substrate 1, which can further improve the thermal conductivity of the condensation substrate 1, so as to more accurately reflect the condensation of the high-voltage frequency converter.

[0098] In some embodiments, continue to refer to Figure 2-Figure 6 The condensation detection device may further include a fixing device 4 and a mounting bracket 5 , and the fixing device 4 is disposed on the mounting bracket 5 .

[0099] Among them, the mounting bracket 5 is a U-shaped structure, and the fixing device 4 can be set on the horizontal plate of the U-shaped structure. The two sides of the horizontal plate are vertical plates. The top of the vertical plate is connected to the edge of the horizontal plate. The bottom of the vertical plate can be set with a fixed edge outward to lock the mounting bracket at any position in the frequency conversion cabinet through a locking member, that is, the mounting bracket 5 can be fixed at any position in the frequency conversion cabinet to install the condensation detection device in the frequency conversion cabinet to realize condensation detection in the frequency conversion cabinet. One side of the fixing device 4 fixes the auxiliary radiator 3 through a mounting column, specifically connected to the other side of the auxiliary radiator 3 away from the condensation substrate 1, and the other side of the fixing device 4 away from the auxiliary radiator 3 fixes the condensation detection board 2 through a mounting column. The condensation detection device can be fixed at any position in the frequency conversion cabinet where the high-voltage frequency converter is located by means of the fixing device 4 and the mounting bracket 5, preferably at a position at the bottom of the cabinet near the air inlet, so as to ensure that the condensation detection plate 2 in the condensation detection device is not affected by condensation, and ensure that after condensation is generated on the condensation substrate 1, condensation will not accumulate for a long time, and timely ventilation and heat dissipation are ensured, so that the condensation detection device can perform timely detection again when condensation occurs next time.

[0100] In this embodiment, a condensation detection signal is generated by a condensation detection device. The condensation detection device has a simple structure and low cost. At the same time, accurate and timely condensation detection can be achieved, so that the condensation protection control device can perform subsequent actions after obtaining the condensation detection signal, thereby accurately and quickly providing condensation protection or condensation removal measures.

[0101] The above is only a feasible implementation of step S10 provided in this embodiment, and this embodiment does not specifically limit the specific implementation of step S10.

[0102] Step S20, when it is determined according to the condensation detection signal that condensation exists in the high-voltage inverter, the high-voltage closing state of the high-voltage inverter is determined.

[0103] It should be noted that the condensation detection signal can indicate whether there is condensation, including the presence or absence of condensation. In some embodiments, when it is determined that there is no condensation in the high-voltage inverter according to the condensation detection signal, the process can be directly terminated or the condensation detection result can be output. When it is determined that there is condensation in the high-voltage inverter according to the condensation detection signal, the condensation protection control device can further determine the high-voltage closing state of the high-voltage inverter, that is, determine whether the high-voltage inverter is closed, so as to detect the situation that condensation occurs in the high-voltage inverter under the high-voltage power-on state, so that condensation protection can be provided accordingly, and the high-voltage inverter can be detected although it is not powered on, but there is condensation, so that the corresponding blockage can be closed to avoid high voltage power in the condensation state.

[0104] Step S30, when the high voltage closing state is closed, controlling the high voltage inverter to perform high voltage tripping according to the fault detection signal of the high voltage inverter.

[0105] It should be noted that the high voltage closing state is used to indicate whether the high voltage inverter is closed, including two situations: not closed or closed.

[0106] In some embodiments, after the high-voltage closing state of the high-voltage inverter is determined in step S20, when the high-voltage closing state is closed, it means that the high-voltage inverter is in a high-voltage power-on state; it can be known from step S10 that the high-voltage inverter still has condensation, which means that the high-voltage inverter has generated condensation in the high-voltage power-on state. Because there are many risks of condensation in the high-voltage inverter in the high-voltage power-on state, the high-voltage inverter may not only have a fault, but also expand the fault. Therefore, at this time, the condensation protection control device can obtain the fault detection signal of the high-voltage inverter, and then control the high-voltage inverter to perform high-voltage tripping according to the fault detection signal to provide condensation protection measures.

[0107] Step S40, when the high voltage closing state is not closed, blocking the closing action of the high voltage inverter.

[0108] In some embodiments, after the high-voltage closing state of the high-voltage inverter is determined in step S20, when the high-voltage closing state is not closed, it means that the high-voltage inverter is not in working state; but it can be known through step S10 that the high-voltage inverter has condensation phenomenon, that is, although the high-voltage inverter has condensation, the high-voltage inverter is not in the power-on state at this time, and it is not easy to increase the leakage current and cause the high-voltage inverter failure. At this time, the process can be directly terminated or the closing action of the high-voltage inverter can be blocked. Specifically, a blocking closing signal can be output to the high-voltage inverter to avoid the high-voltage inverter being closed when condensation exists in the inverter cabinet, that is, to avoid the high-voltage inverter from being powered on in the condensation state, thereby avoiding the high-voltage inverter from being powered on in the condensation state, which leads to an increase in leakage current and causes the high-voltage inverter failure or other irreversible damage. Among them, the closing action of the high-voltage inverter is blocked to avoid the high-voltage inverter from being powered on in the condensation state, which leads to an increase in leakage current and causes the high-voltage inverter failure or other irreversible damage.

[0109] The present embodiment provides a condensation protection control method, which determines the high-voltage closing state of the high-voltage frequency converter when it is determined according to a condensation detection signal that condensation exists in the high-voltage frequency converter, and controls the high-voltage frequency converter to perform high-voltage tripping according to a fault detection signal of the high-voltage frequency converter when the high-voltage closing state is closed, thereby providing condensation protection for the high-voltage frequency converter; and blocks the closing action of the high-voltage frequency converter when the high-voltage closing state is not closed, thereby providing condensation power-on protection for the high-voltage frequency converter; based on the high-voltage closing state of the high-voltage frequency converter, this method can identify the phenomenon of condensation generated by the high-voltage frequency converter in the high-voltage energized state, so as to perform high-voltage tripping and achieve condensation protection, and can also identify the phenomenon of condensation generated by the high-voltage frequency converter in the non-powered state, so as to block the closing, thereby avoiding irreversible damage caused by high-voltage power being supplied to the high-voltage frequency converter in the condensation state.

[0110] In a feasible implementation, step S30 may include steps S31 to S33:

[0111] Step S31, when the high-voltage closing state is closed, determine the current dehumidification suppression condition of the high-voltage inverter according to the fault detection signal of the high-voltage inverter; wherein the dehumidification suppression condition includes that the dehumidification means is sufficient to suppress condensation or the dehumidification means is insufficient to suppress condensation.

[0112] Because the high-voltage inverter is already in a high-voltage power-on state, that is, in a working state, its own operation or the operation of other devices will inevitably generate heat, which can achieve a certain degree of decondensation, or other dehumidification / heating devices in the inverter cabinet can also achieve a certain degree of decondensation, that is, a certain degree of condensation suppression. When the heat brought by the high-voltage inverter itself is sufficient to suppress the accumulation of condensation, it can be ensured that condensation will not cause more impact on the high-voltage inverter or avoid more condensation from affecting it. Therefore, although the presence of condensation has been detected, it is still necessary to further determine whether the current condensation suppression means, that is, the dehumidification means, are sufficient to suppress condensation based on different degrees of condensation.

[0113] Step S32: If the dehumidification suppression condition is that the dehumidification means are insufficient to suppress condensation, the high-voltage inverter is controlled to perform a high-voltage trip.

[0114] It should be noted that when there is only condensation in the inverter cabinet, and there is no water ingress or other problems that cause the humidity in the cabinet to increase, or the condensation phenomenon is not too serious, most of the time the dehumidification suppression situation is that the dehumidification means are sufficient to suppress the condensation; on the contrary, when the condensation phenomenon is more serious, or there is water ingress or other problems in the inverter cabinet that cause the humidity inside it to increase, the dehumidification suppression situation is that the dehumidification means are not enough to suppress the condensation. When the dehumidification means are not enough to suppress the condensation, the risk of high-voltage inverter failure will increase. For high-voltage inverters that already have faults, the risk of the fault expansion will also increase, and there is even a risk of explosion. At this time, the condensation protection control device can control the high-voltage inverter to perform high-voltage tripping and provide condensation protection measures. That is, the condensation protection control device will only perform high-voltage tripping after identifying that the current dehumidification effect of the high-voltage inverter is not enough to suppress condensation. It takes into account the situation that the high-voltage inverter itself can dehumidify, and also realizes condensation protection.

[0115] In one embodiment, step S32 may include step S321:

[0116] Step S321: If the dehumidification suppression condition is that the dehumidification means are insufficient to suppress condensation, the high-voltage inverter is controlled to perform a high-voltage trip and a fault alarm is issued.

[0117] When the condensation protection control device recognizes that the current dehumidification effect of the high-voltage inverter is insufficient to suppress condensation, it not only performs a high-voltage trip to provide condensation protection, but also reports the situation to the staff, that is, a fault alarm, so that the staff can be aware of the situation in time and take corresponding measures to dehumidify the inverter cabinet in time.

[0118] Step S33: If the dehumidification suppression condition is that the dehumidification means are sufficient to suppress condensation, a condensation alarm is issued.

[0119] It should be noted that when the condensation protection control device identifies that the current dehumidification effect of the high-voltage inverter is sufficient to suppress condensation, although there is condensation, it will not cause too much problem, that is, the high-voltage inverter can actually continue to work normally. However, at this time it is necessary to inform the staff that there is condensation in the inverter cabinet, that is, to issue a condensation alarm to remind the staff to pay attention to this phenomenon and prevent other fault problems.

[0120] In the present embodiment, when the high-voltage closing state is closed, the current dehumidification suppression situation of the high-voltage inverter is determined according to the fault detection signal of the high-voltage inverter. If the dehumidification suppression situation is that the dehumidification means are insufficient to suppress condensation, the high-voltage inverter is controlled to perform high-voltage tripping, thereby achieving the purpose of providing condensation protection for the high-voltage inverter. On the basis of realizing condensation detection, this method identifies the phenomenon that condensation is generated when the high-voltage inverter is in a high-voltage energized state based on the high-voltage closing state of the high-voltage inverter. Since the high-voltage inverter generates heat when it works normally, it can achieve a certain dehumidification effect on the condensation. Based on this, the method also combines the fault detection signal of the high-voltage inverter to identify the situation that the current dehumidification effect of the high-voltage inverter is insufficient to suppress condensation, and then executes high-voltage tripping. Condensation protection is achieved on the basis of taking into account that the high-voltage inverter itself can dehumidify, and repeated tripping can be avoided to affect the normal operation of the high-voltage inverter.

[0121] In a feasible implementation, step S31 may include steps S311 to S313:

[0122] Step S311, when the high-voltage switch-on state is closed, dehumidifying the high-voltage inverter through the working heat of the high-voltage inverter to suppress condensation of the high-voltage inverter;

[0123] Step S312, acquiring a fault detection signal of the high-voltage inverter in real time;

[0124] Step S313, determining the current dehumidification suppression status of the high-voltage inverter according to the fault detection signal.

[0125] It should be noted that when there is only a high-voltage inverter in the inverter cabinet and no other dehumidification or heating device, it can be known through steps S10 to S20 that condensation occurs in the high-voltage inverter and the high voltage has been switched on. At this time, the high-voltage inverter can be dehumidified only by the heat generated by the working heat of the high-voltage inverter to suppress the condensation of the high-voltage inverter. However, because there are different degrees of condensation, it may or may not cause a fault to the high-voltage inverter, so the condensation protection control device can further determine the current dehumidification suppression status of the high-voltage inverter, specifically by obtaining the fault detection signal of the high-voltage inverter in real time to determine whether the high-voltage inverter has a fault. If there is a fault, it means that the condensation is serious and has caused the high-voltage inverter to fail, that is, the current dehumidification means only through the working heat of the high-voltage inverter is not enough to suppress condensation, and step S32 can be executed accordingly. On the contrary, if there is no fault, it means that the condensation is not too serious and has not caused the high-voltage inverter to fail, that is, the current dehumidification means is sufficient to suppress condensation, and step S33 can be executed accordingly.

[0126] Optionally, step S33 may include step S331:

[0127] Step S331: If the dehumidification suppression condition is that the dehumidification means are sufficient to suppress condensation, a condensation alarm is issued, and the high-voltage inverter is controlled to keep working to continue dehumidifying the high-voltage inverter.

[0128] It should be noted that when the condensation protection control device identifies that the dehumidification suppression situation is that the dehumidification means are sufficient to suppress condensation, it means that the dehumidification means of dehumidifying the high-voltage inverter through the working heat of the high-voltage inverter can suppress the condensation of the high-voltage inverter and does not cause a high-voltage inverter failure. At this time, a condensation alarm can be issued to remind the staff to pay attention to this phenomenon. The condensation protection control device can also be used to control the high-voltage inverter to keep working. Continuous work will continue to generate heat and dehumidify. Even if condensation continues to occur subsequently, this heat is sufficient to suppress it. Of course, if condensation does not occur subsequently, this heat can just slowly eliminate the condensation, thereby achieving continuous and effective dehumidification of the high-voltage inverter.

[0129] In this embodiment, even if no other dehumidification device is installed in the frequency converter cabinet, if the heat generated by the operation of the high-voltage frequency converter is sufficient to suppress condensation, the high-voltage frequency converter can be controlled to keep working while the condensation alarm is issued, thereby avoiding excessive protection and affecting the operation of the high-voltage frequency converter.

[0130] In another feasible implementation manner, the frequency conversion cabinet where the high-voltage frequency converter is located is provided with a fan; step S311 may include steps S3111 to S3112:

[0131] Step S3111, when the high voltage closing state is closed, control the fan to work;

[0132] Step S3112, dehumidifying the high-voltage inverter through the working heat generation of the high-voltage inverter and the working heat dissipation of the fan to suppress condensation of the high-voltage inverter.

[0133] It should be noted that, different from the aforementioned step S311, the frequency converter cabinet in this embodiment is provided with a fan in addition to the high-voltage frequency converter. The fan can be provided on the top of the frequency converter cabinet, and the fan can be connected to the condensation protection control device, and the condensation protection control device can control its start and stop.

[0134] Through steps S10 to S20, it can be known that condensation occurs in the high-voltage inverter and the high voltage has been closed. At this time, heating dehumidification can be achieved through two dehumidification methods: the working heat of the high-voltage inverter and the working heat dissipation of the fan, so as to suppress the condensation of the high-voltage inverter. The current dehumidification suppression status of the high-voltage inverter can be further determined, and it can be determined whether the dehumidification methods currently combined by the two methods are sufficient to suppress condensation, so as to correspondingly select to execute step S32 or step S33.

[0135] Optionally, step S33 may include step S332:

[0136] Step S332: If the dehumidification suppression condition is that the dehumidification means are sufficient to suppress condensation, a condensation alarm is issued, and the high-voltage inverter is controlled to keep working and / or the fan is controlled to keep working to continue dehumidifying the high-voltage inverter.

[0137] It should be noted that when the condensation protection control device identifies that the dehumidification suppression situation is that the dehumidification means are sufficient to suppress condensation, it means that the dehumidification means combined by the two methods of heat generation by the high-voltage inverter and heat dissipation by the fan are sufficient to suppress condensation of the high-voltage inverter, and no high-voltage inverter failure is caused. At this time, a condensation alarm can be issued to remind the staff to pay attention to this phenomenon. The condensation protection control device can also be used to control only the high-voltage inverter to keep working, only the fan to keep working, or both the high-voltage inverter to keep working and the fan to keep working, so as to continuously and effectively dehumidify the high-voltage inverter, thereby ensuring that the operation of the high-voltage inverter is not affected and improving the tolerance of the high-voltage inverter.

[0138] In this embodiment, a fan is provided in the frequency converter cabinet to dehumidify the high-voltage frequency converter by using the working heat of the high-voltage frequency converter and the working heat dissipation of the fan, thereby providing a dehumidification method with better dehumidification effect by combining two modes. This can ensure that normal operation can be carried out even under more severe condensation phenomena without causing any failure or with a lower risk of failure, thereby improving the tolerance of the high-voltage frequency converter to condensation phenomena, thereby improving the tolerance of the frequency converter cabinet.

[0139] In another feasible implementation manner, the frequency converter cabinet where the high-voltage frequency converter is located is also provided with a heater, that is, the frequency converter cabinet is provided with a fan and a heater; after step S30 "when the high-voltage closing state is closed, the high-voltage frequency converter is controlled to perform high-voltage tripping according to the fault detection signal of the high-voltage frequency converter", the condensation protection control method may further include steps S50 to S80:

[0140] Step S50, blocking the closing action of the high-voltage inverter, and controlling the fan and / or the heater to operate to dehumidify the high-voltage inverter.

[0141] It should be noted that, different from the aforementioned steps S311 and S3111, the frequency converter cabinet under this embodiment is provided with a fan and a heater in addition to the high-voltage frequency converter. The heater can be arranged inside the frequency converter cabinet, and the heater can be connected to the condensation protection control device, and the condensation protection control device controls its start and stop. It is worth noting that when the high-voltage frequency converter is working, the heater will not work, otherwise it may cause the high-voltage frequency converter to be overheated, which will affect its operation.

[0142] After the high-voltage inverter is controlled to perform high-voltage tripping in step S30, the high-voltage inverter is no longer in working state, and at this time, the high-voltage inverter itself will not generate heat. However, it can be known from step S10 that the high-voltage inverter has condensation phenomenon, and the condensation can be suppressed by the fan working heat dissipation and / or the heater working heat. However, before this, it is necessary to block the closing action of the high-voltage inverter first, and specifically output a blocking closing signal to the high-voltage inverter to prevent the high-voltage inverter from being powered on in the condensation state, which will cause the leakage current to increase and cause the high-voltage inverter to fail.

[0143] Step S60: When the dehumidification time of the high-voltage inverter reaches a preset time, it is determined whether condensation still exists in the high-voltage inverter according to the condensation detection signal.

[0144] It should be noted that when the fan and / or heater are controlled to work to heat and dehumidify the high-voltage inverter, after a preset time, it is possible to determine whether condensation still exists in the high-voltage inverter based on the state of the condensation detection signal obtained in real time, because after the condensation is eliminated by heating and dehumidification, the condensation detection board 2 in the condensation detection device will be reset, that is, the condensation detection signal obtained in real time by the condensation protection control device will change, for example, from a high-level state indicating the presence of condensation to a low-level state indicating the absence of condensation, so that the condensation protection control device can know the current condensation situation in the inverter cabinet based on the condensation detection signal. Among them, the specific duration of the fan and / or heater operation, that is, the preset duration, can be set as needed and is not limited here.

[0145] Step S70: If there is no condensation in the high-voltage inverter, the closing action of the high-voltage inverter is unlocked to enable the high-voltage inverter to work normally.

[0146] After judging in step S60, if there is no condensation in the high-voltage inverter, it means that the condensation has been eliminated after the fan and / or the heater work to heat and dehumidify. At this time, the closing action of the high-voltage inverter can be unblocked. Specifically, a closing permission signal can be output to the high-voltage inverter, so that the high-voltage inverter can be normally powered on and put into normal operation.

[0147] Step S80: If condensation still exists in the high-voltage inverter, a fault alarm is issued.

[0148] After the judgment in step S60, if condensation still exists in the high-voltage inverter, it means that the condensation has not been eliminated after the fan and / or heater work to heat and dehumidify. At this time, the closing action of the high-voltage inverter can be kept blocked, that is, the closing blockade can be maintained to avoid high voltage power in the condensation state, and a fault alarm can be performed to remind the staff to take timely measures to dehumidify the frequency converter cabinet. The fault information can also be uploaded to the background monitoring center through the condensation protection control device to realize remote reminder.

[0149] In this embodiment, after the high voltage trips, the high voltage closing is blocked to prevent the high voltage inverter from being powered on in a condensation state and causing inverter failure; condensation is eliminated by operating the fan and / or the heater, which can effectively and efficiently remove condensation and ensure the internal environment of the inverter cabinet to ensure the normal operation of the high voltage inverter.

[0150] In another feasible implementation manner, the frequency converter cabinet where the high-voltage frequency converter is located is provided with a fan and a heater; step S40 "blocking the closing action of the high-voltage frequency converter when the high-voltage closing state is not closed" may include steps S41 to S44:

[0151] Step S41, blocking the closing action of the high-voltage inverter, and controlling the operation of the fan and / or the heater to dehumidify the high-voltage inverter.

[0152] When the high voltage switch is not closed, the high voltage inverter is in a non-operating state. At this time, the high voltage inverter itself does not generate heat. In view of the condensation phenomenon of the high voltage inverter, the condensation should be eliminated in time so that the high voltage inverter can be put into normal operation later. Specifically, the closing action of the high voltage inverter can be blocked first, and then the condensation can be suppressed by the fan working heat dissipation and / or the heater working heat to dehumidify the high voltage inverter.

[0153] Step S42: when the dehumidification time of the high-voltage inverter reaches a preset time, it is determined whether condensation still exists in the high-voltage inverter according to the condensation detection signal.

[0154] Step S43: if there is no condensation in the high-voltage inverter, the closing action of the high-voltage inverter is unlocked to enable the high-voltage inverter to work normally.

[0155] Step S44: If condensation still exists in the high-voltage inverter, a fault alarm is issued.

[0156] When condensation still exists on the high-voltage inverter, the closing action of the high-voltage inverter can be blocked, that is, the closing blockade can be maintained to avoid high voltage power supply under condensation state, and a fault alarm can be issued to remind the staff to take timely measures to dehumidify the inverter cabinet.

[0157] It should be noted that more implementation details of the above steps S41-S44 can be referred to the specific description of steps S50-S80, which will not be repeated here.

[0158] In this embodiment, when the high voltage is not closed, the high voltage closing is blocked, which can prevent the high voltage inverter from being powered on in a condensation state and causing inverter failure; condensation is eliminated by operating the fan and / or the heater, which can effectively and efficiently remove condensation and ensure the internal environment of the inverter cabinet to ensure the normal operation of the high voltage inverter.

[0159] In a feasible implementation manner, the high-voltage inverter includes a transformer module and a power module, and the fault detection signal includes a current abnormality signal, a temperature and humidity abnormality signal of the transformer module, and / or an operation abnormality signal of the power module; in step S31, "determining the current dehumidification suppression condition of the high-voltage inverter according to the fault detection signal of the high-voltage inverter" or step S313 may include steps S3101 to S3105:

[0160] Step S3101, when the whole machine input current of the high voltage inverter is not within the preset current threshold range, a current abnormality signal is generated;

[0161] Step S3102, when the real-time temperature and humidity of the transformer module are not within the preset temperature and humidity threshold range, a temperature and humidity abnormality signal is generated;

[0162] Step S3103, when the power module has input phase loss, input voltage abnormality, overcurrent fault, overvoltage fault and / or undervoltage fault, an operation abnormality signal is generated;

[0163] Step S3104: if a current abnormality signal, a temperature and humidity abnormality signal, or an operation abnormality signal is obtained, it is determined that the current dehumidification suppression condition of the high-voltage inverter is that the dehumidification means are insufficient to suppress condensation;

[0164] Step S3105: if any abnormal signal among the abnormal current signal, the abnormal temperature and humidity signal, and the abnormal operation signal is not obtained, it is determined that the current dehumidification suppression condition of the high-voltage inverter is that the dehumidification means are sufficient to suppress condensation.

[0165] It should be noted that the transformer module can be a phase-shifting transformer, which is used to transform the voltage and provide the power module with the voltage required for its operation. The power module can be a power unit device, which is used to implement rectification or inversion processing, convert direct current into alternating current, and provide it to the motor to control the speed, torque or direction of the motor. The condensation protection control device can combine the sampling signals such as temperature, humidity, current, and voltage in the frequency conversion cabinet to specifically determine whether the high-voltage frequency converter has a fault, which can be achieved by a variety of means.

[0166] It should also be noted that when the transformer module is short-circuited or the insulation is reduced due to water ingress, the temperature and humidity inside the transformer module will increase, and the input current of the high-voltage inverter will increase; when the power module is flooded, it may cause the input voltage of the module to be abnormal and the module to have overcurrent, overvoltage or undervoltage faults. Therefore, these characteristics can be used to detect faults in the high-voltage inverter and its transformer module and power module, so that the accidental water ingress of the inverter cabinet can be identified, and the aforementioned various condensation suppression methods can be combined to dehumidify to ensure the normal operation of the high-voltage inverter, and / or perform high-voltage tripping to protect the high-voltage inverter. For details, please refer to the aforementioned description, which will not be repeated here.

[0167] Exemplarily, the condensation protection control device can determine whether the whole machine input current of the high-voltage inverter is within a preset current threshold range (such as 90%-120% of the normal value), or determine whether it is less than a preset value (such as 120% of the normal value). If so, it means that the whole machine input current is normal. Otherwise, it means that the whole machine input current is abnormal, and a corresponding current abnormal signal is generated, and the signal is used as a fault detection signal to determine the current dehumidification suppression of the high-voltage inverter. The condensation protection control device can also determine whether the real-time temperature and humidity of the transformer module in the high-voltage inverter are within the preset temperature and humidity threshold range. If so, it means that the transformer module is not overheated or overhumidified. Otherwise, it means that the transformer module is overheated or overhumidified, and the temperature and humidity are abnormal. A corresponding temperature and humidity abnormal signal is generated, and the signal is used as a fault detection signal to determine the current dehumidification suppression of the high-voltage inverter. The condensation protection control device can also determine whether the power module in the high-voltage inverter has one or more faults such as input phase loss, abnormal input voltage, overcurrent fault, overvoltage fault and / or undervoltage fault. If none of these faults exist, it means that the power module is operating normally. On the contrary, if any of these faults exists, it means that the power module is operating abnormally, and an abnormal operation signal is generated accordingly, and the signal is used as a fault detection signal to determine the current dehumidification suppression of the high-voltage inverter. It can be understood that the fault detection signal in actual application may include one or more of the abnormal current signal, the abnormal temperature and humidity signal and the abnormal operation signal. Correspondingly, one or more of the above methods can be used to determine the current dehumidification suppression of the high-voltage inverter.

[0168] In some embodiments, sampling and judgment of the current conditions of the above-mentioned high-voltage inverter, the temperature and humidity conditions of the transformer module and / or the operating conditions of the power module can be achieved through an external detection device independent of the condensation protection control device, so that the condensation protection control device can directly obtain the corresponding output signal when an abnormality occurs from the detection device, which can reduce the resource occupation of the condensation protection control device.

[0169] It is understandable that if there is no abnormality in the current of the high-voltage inverter, the temperature and humidity of the transformer module, and the various operations of the power module, then the condensation protection control device will not obtain the abnormal current signal, the abnormal temperature and humidity signal, and the abnormal operation signal, which means that the current dehumidification means of the high-voltage inverter are sufficient to suppress condensation. At this time, the current state can be maintained, including the normal operation of the high-voltage inverter, the suppression of condensation by the working heat of the high-voltage inverter, or the suppression of condensation by the working heat of the high-voltage inverter and the working heat dissipation of the fan, etc., which can be selected according to actual needs. Of course, the fan and / or heater can also be controlled to suppress condensation without closing the switch, which is not specifically limited here. Optionally, a condensation alarm can also be performed, and the alarm information can be uploaded to the background monitoring center, so that relevant managers or maintenance personnel can receive abnormal information in time for investigation.

[0170] On the contrary, if there is an abnormality in the current of the high-voltage inverter, the temperature and humidity of the transformer module, and the operation of the power module, that is, the condensation protection control device obtains any one of the abnormal current signal, the abnormal temperature and humidity signal, and the abnormal operation signal, it means that the current dehumidification means of the high-voltage inverter are not sufficient to suppress condensation. At this time, step S32 can be executed accordingly to control the high-voltage inverter to perform high-voltage tripping, or continue to block the closing action of the high-voltage inverter, control the fan operation and / or the heater operation, that is, execute steps S50-80.

[0171] In the present embodiment, in addition to being able to identify condensation and provide condensation protection when the current dehumidification effect is insufficient to suppress condensation, it is also possible to further determine whether there is accidental water ingress into the frequency converter cabinet. Accidental water ingress may cause multiple faults in the high-voltage frequency converter and its internal components, thereby deteriorating the current dehumidification effect. Protection is also provided in the event of accidental water ingress, effectively preventing the high-voltage frequency converter from maintaining high voltage power-on when condensation or accidental water ingress occurs, thereby causing the high-voltage frequency converter fault to expand.

[0172] For example, in order to help understand the implementation process of the condensation protection control method of the embodiment of the present application, refer to Figure 7 , Figure 7 An application example flow chart of a condensation protection control method is provided, specifically:

[0173] Step A1: Detect condensation using a condensation detection board.

[0174] Condensation detection board can be Figure 2-Figure 6 The condensation detection plate 2 in the condensation detection device shown outputs a condensation detection signal after detecting condensation.

[0175] Step A2: Determine whether the high voltage is closed; if so, execute step A3; if not, execute step A8.

[0176] After determining the presence of condensation according to the condensation detection signal, identify the current closing status of the high-voltage inverter. If it is closed, continue to execute step A3, otherwise jump to step A8.

[0177] Step A3: Determine whether the input current of the whole machine is greater than 120% of the normal value; if so, execute step A7; if not, execute step A4.

[0178] The current threshold range is set by setting a threshold of 120% of the normal input current value, and the abnormality of the input current of the high-voltage inverter is judged. If there is an abnormality, it can be considered that the high-voltage inverter is faulty, and there may be a phenomenon of accidental water ingress to the high-voltage inverter or the phase-shifting transformer therein. At this time, step A7 can be jumped, otherwise, step A4 is continued.

[0179] Step A4: Determine whether the phase-shifting transformer triggers an over-temperature / over-humidity alarm; if so, execute step A7; if not, execute step A5.

[0180] The phase-shifting transformer in the high-voltage inverter is tested for over-temperature / over-humidity. If over-temperature / over-humidity exists, an over-temperature / over-humidity alarm may be triggered. Thus, an abnormality judgment may be made based on whether the phase-shifting transformer has triggered the over-temperature / over-humidity alarm. If an abnormality exists, it may be considered that the phase-shifting transformer is faulty and water may have accidentally entered the phase-shifting transformer. In this case, the process may jump to step A7. Otherwise, the process may continue to execute step A5.

[0181] Step A5: Check whether the power unit triggers input phase loss / input voltage abnormality / overcurrent / overvoltage / undervoltage faults and alarms; if so, execute step A7; if not, execute step A6.

[0182] The power unit in the high-voltage inverter is subjected to multiple inspections including input phase loss / input voltage abnormality / overcurrent / overvoltage / undervoltage to determine the abnormality of the power unit. If any of these faults exists or the alarm corresponding to any fault is triggered, that is, there is an abnormality, it can be considered that the power unit is faulty and there may be a phenomenon of accidental water ingress. At this time, step A7 can be jumped, otherwise, step A6 is continued.

[0183] Step A6: Maintain the current state, alarm, and upload the alarm information.

[0184] At this time, the input current of the whole machine is less than 120% of the normal value, the phase-shifting transformer is not over-temperature / over-humidity, and the power unit has no input phase loss / input voltage abnormality / overcurrent / overvoltage / undervoltage and other fault problems, then the high-voltage inverter can maintain the closing normally and continue to work; it can also issue a condensation alarm to inform the existence of condensation, and the alarm information can be uploaded to the user end or the background monitoring end.

[0185] Step A7: Report a fault, high voltage trip, and upload the fault information; optionally jump to step A8.

[0186] If any of the above fault conditions exists, if the high-voltage inverter continues to work, it may cause a larger fault. Therefore, a high-voltage trip can be executed at this time to protect the high-voltage inverter. The fault can also be reported synchronously, including where the specific fault is, and the fault information can be uploaded to the user end or the background monitoring end.

[0187] Optionally, after the high-voltage inverter performs high-voltage tripping, the condensation present therein may be eliminated, that is, continue to perform step A8.

[0188] Step A8: Block the closing signal and turn on the heater inside the cabinet and the fan on the top of the cabinet.

[0189] When the high-voltage inverter is in the high-voltage closing state, or after the high-voltage inverter performs a high-voltage trip, the heater in the inverter cabinet and the fan on the top of the inverter cabinet can be turned on to heat and dehumidify the inverter cabinet to achieve condensation suppression.

[0190] Step A9: After a preset time, determine whether the condensation detection board signal is reset; if so, execute step A10; if not, execute step A11.

[0191] After a certain period of heating and dehumidification, the condensation detection signal output by the condensation detection board 2 is obtained in real time, and the current dehumidification suppression status of the high-voltage inverter is determined based on the condensation detection signal. Assuming that when condensation exists, the signal output by the condensation detection board 2 is a high level, then when the signal output by the condensation detection board 2 is reset to a low level, it can be considered that there is no condensation. Specifically, it is judged whether the condensation detection board signal is reset. If so, it means that the condensation generated before has been eliminated, and the high-voltage inverter can enter normal operation, that is, continue to execute step A11; on the contrary, if the condensation detection board 2 still detects that there is condensation in the high-voltage inverter, that is, it has not been reset, it means that the condensation suppression effect of the dehumidification means currently used is poor and is insufficient to suppress the generated condensation. At this time, if the high-voltage switch is closed, there will be a greater risk, and step A11 can be jumped at this time.

[0192] Step A10: Output closing permission signal.

[0193] When the condensation is eliminated, the high-voltage inverter can be closed again or enter the closing state, so the closing permission signal can be output accordingly and the closing blockade can be released.

[0194] Step A11: Report a fault and upload the fault information.

[0195] When condensation exists and cannot be effectively suppressed, it is difficult to ensure a safe operating environment for the high-voltage inverter. At this time, a fault can be reported and the fault information can be uploaded to the user end or the background monitoring end.

[0196] In this application example, the condensation state in the frequency converter cabinet can be automatically detected and decondensation measures can be initiated, which can prevent the high-voltage frequency converter from being powered on at high voltage in the condensation state, causing the machine to explode, or condensation from being generated when high voltage is powered on, or maintaining high voltage power supply when water accidentally enters, causing the fault to expand.

[0197] It should be noted that the above examples are only used to understand the present application and do not constitute a limitation on the condensation protection control method of the present application. More simple transformations based on this technical concept are all within the protection scope of the present application.

[0198] The present application also provides a high voltage inverter, referring to Figure 8 , Figure 8A functional module connection diagram of a high-voltage inverter is provided, wherein the high-voltage inverter includes a transformer module 10, a power module 20 and a main control module 30;

[0199] The main control module 30 is connected to the transformer module 10 and the power module 20 respectively, and the main control module 30 is used to implement the steps of the condensation protection control method as described above.

[0200] In one embodiment, if Figure 8 As shown, the power module 20 may be connected to the transformer module 10, wherein the transformer module 10 may be a phase-shifting transformer for realizing voltage conversion, and the power module 20 may be a power unit device for realizing rectification or inversion.

[0201] The high-voltage inverter provided by the present application adopts the condensation protection control method in the above embodiment, which can solve the technical problem that the high-voltage inverter in the related art does not have condensation protection. Compared with the related art, the beneficial effects of the high-voltage inverter provided by the present application are the same as the beneficial effects of the condensation protection control method provided by the above embodiment, and other technical features in the high-voltage inverter are the same as the features disclosed in the condensation protection control method in the above embodiment, which will not be repeated here.

[0202] The present application also provides a condensation protection control device, which includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the condensation protection control method in the above-mentioned embodiment.

[0203] Reference below Fig. 9 , Fig. 9 The hardware structure diagram of the condensation protection control device suitable for implementing the embodiment of the present application is shown. The condensation protection control device may include but is not limited to mobile terminals such as mobile phones, laptops, PADs (Portable Application Description: tablet computers), PDAs (Personal Digital Assistants), etc., and fixed terminals such as servers, embedded computers, industrial computers, desktop computers, etc. Fig. 9 The condensation protection control device shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0204] like Fig. 9As shown, the condensation protection control device may include a processing device 1001 (such as a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. Various programs and data required for the operation of the condensation protection control device are also stored in the RAM 1004. The processing device 1001, the ROM 1002, and the RAM 1004 are connected to each other via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus 1005. Typically, the following systems may be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 may allow the condensation protection control device to communicate with other devices wirelessly or by wire to exchange data. Although the condensation protection control device with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown, and more or fewer systems may be implemented or have instead.

[0205] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable storage medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication device 1009, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the condensation protection control method disclosed in the embodiment of the present application are executed.

[0206] The condensation protection control device provided by the present application adopts the condensation protection control method in the above embodiment, which can solve the technical problem that the high-voltage inverter in the related art does not have condensation protection. Compared with the related art, the beneficial effects of the condensation protection control device provided by the present application are the same as the beneficial effects of the condensation protection control method provided by the above embodiment, and the other technical features in the condensation protection control device are the same as the features disclosed in the condensation protection control method in the above embodiment, which will not be repeated here.

[0207] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0208] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0209] The present application also provides a computer-readable storage medium having computer-readable program instructions (ie, computer programs) stored thereon, the computer-readable program instructions being used to execute the condensation protection control method in the above-mentioned embodiment.

[0210] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared or semiconductor systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: a portable computer disk, hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM: Erasable Programmable Read Only Memory or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM: CD-Read Only Memory), optical storage device, magnetic storage device, etc., or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by an instruction execution system or device, or a combination of the two. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency: radio frequency), etc., or any suitable combination of the above.

[0211] The computer-readable storage medium may be included in the condensation protection control device; or may exist independently without being assembled into the condensation protection control device.

[0212] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the condensation protection control device, the condensation protection control device can implement the above functions defined in the condensation protection control method disclosed in the embodiment of the present application.

[0213] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or to an external computer, such as an Internet connection provided by an Internet service provider.

[0214] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the method, device, system and computer program product according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0215] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0216] The storage medium provided in this application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned condensation protection control method, and can solve the technical problem that the high-voltage inverter in the related art does not have condensation protection. Compared with the related art, the beneficial effects of the computer-readable storage medium provided in this application are the same as the beneficial effects of the condensation protection control method provided in the above-mentioned embodiment, and will not be repeated here.

[0217] The present application also provides a computer program product, including a computer program, which implements the steps of the above-mentioned condensation protection control method when executed by a processor.

[0218] The computer program product provided by this application can solve the technical problem that the high-voltage inverter in the related art does not have condensation protection. Compared with the related art, the beneficial effects of the computer program product provided by this application are the same as the beneficial effects of the condensation protection control method provided by the above embodiment, which will not be repeated here.

[0219] The above are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A condensation protection control method, characterized in that: include: Obtain condensation detection signal of high voltage inverter; When it is determined according to the condensation detection signal that condensation exists in the high-voltage inverter, determining a high-voltage closing state of the high-voltage inverter; When the high-voltage closing state is closed, controlling the high-voltage inverter to perform high-voltage tripping according to a fault detection signal of the high-voltage inverter; When the high voltage closing state is not closed, the closing action of the high voltage inverter is blocked.

2. The condensation protection control method according to claim 1, characterized in that: The method of controlling the high-voltage inverter to perform high-voltage tripping according to the fault detection signal of the high-voltage inverter comprises: Determine the current dehumidification suppression condition of the high-voltage inverter according to the fault detection signal of the high-voltage inverter; the dehumidification suppression condition includes that the dehumidification means is sufficient to suppress condensation or the dehumidification means is insufficient to suppress condensation; If the dehumidification suppression condition is that the dehumidification means are insufficient to suppress condensation, controlling the high-voltage inverter to perform a high-voltage trip; If the dehumidification suppression condition is that the dehumidification means are sufficient to suppress condensation, a condensation alarm is issued.

3. The condensation protection control method according to claim 2, characterized in that: The determining the current dehumidification suppression condition of the high-voltage inverter according to the fault detection signal of the high-voltage inverter comprises: Dehumidifying the high-voltage inverter through the working heat of the high-voltage inverter to suppress condensation of the high-voltage inverter; Acquiring a fault detection signal of the high-voltage frequency converter in real time; determining a current dehumidification suppression condition of the high-voltage inverter according to the fault detection signal; If the dehumidification suppression condition is that the dehumidification means are sufficient to suppress condensation, a condensation alarm is issued, including: If the dehumidification suppression condition is that the dehumidification means are sufficient to suppress condensation, a condensation alarm is issued, and the high-voltage inverter is controlled to keep working to continue dehumidifying the high-voltage inverter.

4. The condensation protection control method according to claim 3, characterized in that: The frequency conversion cabinet where the high-voltage frequency converter is located is provided with a fan; The method of dehumidifying the high-voltage inverter by generating heat from the high-voltage inverter to suppress condensation of the high-voltage inverter includes: Controlling the operation of the fan; Dehumidifying the high-voltage inverter through the working heat generation of the high-voltage inverter and the working heat dissipation of the fan to suppress condensation of the high-voltage inverter; If the dehumidification suppression condition is that the dehumidification means are sufficient to suppress condensation, a condensation alarm is issued, including: If the dehumidification suppression condition is that the dehumidification means are sufficient to suppress condensation, a condensation alarm is issued, and the high-voltage inverter is controlled to keep working and / or the fan is controlled to keep working to continue dehumidifying the high-voltage inverter.

5. The condensation protection control method according to claim 2, characterized in that: The frequency conversion cabinet where the high-voltage frequency converter is located is provided with a fan and a heater; After the step of controlling the high-voltage inverter to perform high-voltage tripping if the dehumidification suppression condition is that the dehumidification means is insufficient to suppress condensation, the condensation protection control method further includes: Blocking the closing action of the high-voltage frequency converter, and controlling the operation of the fan and / or the heater to dehumidify the high-voltage frequency converter; When the dehumidification time of the high-voltage inverter reaches a preset time, judging whether condensation still exists in the high-voltage inverter according to the condensation detection signal; If there is no condensation on the high-voltage frequency converter, unblocking the closing action of the high-voltage frequency converter to enable the high-voltage frequency converter to operate normally; If condensation still exists in the high-voltage inverter, a fault alarm is issued.

6. The condensation protection control method according to claim 2, characterized in that: The high-voltage inverter includes a transformer module and a power module, and the fault detection signal includes a current abnormality signal, a temperature and humidity abnormality signal of the transformer module and / or an operation abnormality signal of the power module; The determining the current dehumidification suppression condition of the high-voltage inverter according to the fault detection signal of the high-voltage inverter comprises: When the whole machine input current of the high-voltage inverter is not within the preset current threshold range, generating the current abnormality signal; When the real-time temperature and humidity of the transformer module are not within the preset temperature and humidity threshold range, the temperature and humidity abnormality signal is generated; When the power module has input phase loss, input voltage abnormality, overcurrent fault, overvoltage fault and / or undervoltage fault, the operation abnormality signal is generated; If the abnormal current signal, the abnormal temperature and humidity signal or the abnormal operation signal is obtained, it is determined that the current dehumidification suppression condition of the high-voltage inverter is that the dehumidification means are insufficient to suppress condensation; If any abnormal signal among the abnormal current signal, the abnormal temperature and humidity signal, and the abnormal operation signal is not obtained, it is determined that the current dehumidification suppression condition of the high-voltage inverter is that the dehumidification means is sufficient to suppress condensation.

7. The condensation protection control method according to claim 1, characterized in that: The frequency conversion cabinet where the high-voltage frequency converter is located is provided with a fan and a heater; When the high voltage closing state is not closed, blocking the closing action of the high voltage inverter includes: Blocking the closing action of the high-voltage frequency converter, and controlling the operation of the fan and / or the heater to dehumidify the high-voltage frequency converter; When the dehumidification time of the high-voltage inverter reaches a preset time, judging whether condensation still exists in the high-voltage inverter according to the condensation detection signal; If there is no condensation on the high-voltage frequency converter, unblocking the closing action of the high-voltage frequency converter to enable the high-voltage frequency converter to operate normally; If condensation still exists in the high-voltage inverter, a fault alarm is issued.

8. The condensation protection control method according to any one of claims 1 to 7, characterized in that: A condensation detection device is provided in the frequency conversion cabinet where the high-voltage frequency converter is located. The condensation detection device includes a condensation substrate and a condensation detection board. Two groups of printed wires are arranged on the surface of the condensation substrate at intervals. The two groups of printed wires are connected to the condensation detection board. The step of obtaining a condensation detection signal of a high-voltage frequency converter includes: Converting the equivalent dielectric constant between the two groups of printed lines into a voltage signal through the condensation detection board, and generating a condensation detection signal according to the voltage signal; The condensation detection signal output by the condensation detection board is received.

9. The condensation protection control method according to claim 8, characterized in that: The condensation detection device further includes an auxiliary radiator, which is arranged on one side of the condensation substrate and closely attached to the condensation substrate, and the condensation substrate is an aluminum plate.

10. A condensation protection control device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and running on the processor, wherein the computer program is configured to implement the steps of the condensation protection control method according to any one of claims 1 to 9.

11. A high voltage frequency converter, characterized in that: include: Transformer module; Power module; as well as A main control module is connected to the transformer module and the power module respectively, and the main control module is used to implement the steps of the condensation protection control method according to any one of claims 1 to 9.

12. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the condensation protection control method according to any one of claims 1 to 9 are implemented.

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