Converter valve anti-condensation device, cooling system, anti-condensation method and equipment

Abstract

The invention provides an anti-condensation device, a cooling system, an anti-condensation method and equipment for a converter valve, and the device is connected to the cooling system, and comprises a valve group, a short-circuit pipeline, and a heating device and a water resistance balancing device which are arranged on the short-circuit pipeline; the method comprises the following steps: controlling the cooling loop and the anti-condensation device to work according to the real-time environment temperature in the converter valve hall; according to the device and method, two-stage anti-condensation control over a cooling loop and an anti-condensation device is achieved by arranging a valve set, it is guaranteed that water resistance on an internal circulation operation short-circuit pipeline is consistent with that of an original heat exchange device in combination with a water resistance balancing device, and large fluctuation of the flow of a valve cooling system is avoided; the anti-condensation device is controlled to switch the internal circulation mode, natural heat dissipation of the heat exchange device can be completely cut off, it is guaranteed that the heat dissipation capacity of the heat exchange device and the heating capacity of the anti-condensation device do not conflict or counteract each other, the temperature of a cooling medium is effectively controlled, and therefore condensation in the converter valve is prevented when an air conditioning system of the converter valve breaks down.

Description

Technical Field

[0001] The present invention belongs to the technical field of power electronic direct current transmission of power systems, and specifically relates to a converter valve anti-condensation device, a cooling system, an anti-condensation method and equipment. Background Art

[0002] As an emerging DC transmission technology, flexible DC transmission has the characteristics of no need for AC side voltage support, flexible control, high power quality, and small footprint. It is widely used in market fields such as grid interconnection, renewable energy grid connection, island power supply, and urban power grid power supply. As the core equipment of flexible DC transmission, the flexible DC converter valve will emit huge heat during operation. The converter valve cooling system needs to use deionized water, i.e. cooling medium, to promptly remove the heat in the converter valve and dissipate it to the environment to ensure the normal operation of the converter valve.

[0003] Deionized water flows into the converter valve located in the converter valve hall through the pipeline, takes away the heat from the converter valve and then enters the outdoor air cooler, i.e., the air cooler, to dissipate the heat to the environment. Although deionized water can take away most of the heat generated during the operation of the converter valve, some of the heat is still dissipated to the indoor environment through convection and radiation. Therefore, the valve hall where the converter valve is located is generally controlled by the air conditioning system to keep its indoor temperature and humidity environment within a range suitable for the operation of the equipment.

[0004] However, when the air conditioning system fails and the cooling capacity is less than the heat dissipated by the indoor electrical equipment, the indoor temperature will rise rapidly, causing the high-temperature valve hall air to condense on the colder pipes. Condensation on the cooling pipe inside the converter valve will cause the insulation of the converter valve equipment to decrease, resulting in flashover and other phenomena, endangering the safety of the equipment. Summary of the invention

[0005] In order to overcome the deficiency of the above-mentioned prior art that condensation cannot be prevented when a fault occurs in the air-conditioning system, the present invention proposes a converter valve anti-condensation device, comprising: a valve group, a short-circuit connected to the valve group, a heating device and a water resistance balancing device arranged on the short-circuit; the valve group and the short-circuit constitute a branch connected between the discharge pipe and the return pipe of the converter valve cooling circuit.

[0006] Preferably, the valve group includes a three-way valve, which has a water inlet and two water outlets. The water inlet of the three-way valve is connected to the water outlet of the converter valve, and the two water outlets of the three-way valve are respectively connected to the short-circuit pipe and the heat exchange device in the cooling circuit, and the water outlet states of the two water outlets of the three-way valve are mutually exclusive.

[0007] Preferably, the water resistance balancing device comprises a orifice plate arranged in the short-circuit pipe.

[0008] Preferably, a central through hole is provided on the orifice plate.

[0009] Preferably, the diameter of the central through hole is calculated according to the change in water resistance balance requirement, and is expressed as:

[0010]

[0011] Among them, P1 is the change in water resistance balance demand, P2 is the water resistance of the heat exchange device at rated flow, P3 is the water resistance of the cooling circuit at rated flow, P4 is the water resistance of the heating device, ξ is the local resistance coefficient of the orifice plate; v is the water flow velocity; g is the acceleration of gravity; D is the inner diameter of the short-circuit pipe; d is the aperture of the central through hole.

[0012] Preferably, the heating device comprises an electric heater arranged on the short-circuit line.

[0013] Preferably, the short-circuit tube is arranged in an indoor environment.

[0014] Based on the same inventive concept, the present invention also provides a converter valve anti-condensation cooling system, comprising: a cooling circuit, an anti-condensation device arranged on the cooling circuit, a temperature and humidity sensor arranged in a main exhaust duct of a converter valve hall, and a controller, wherein the controller is electrically connected to the cooling circuit, the anti-condensation device and the temperature and humidity sensor;

[0015] The controller is used to obtain the real-time ambient temperature in the valve hall of the converter valve based on the temperature and humidity sensor, and to obtain the temperature of the cooling medium in real time based on the cooling circuit, and to determine the real-time temperature threshold of the cooling medium in the converter valve according to the real-time ambient temperature; when the temperature of the cooling medium is less than or equal to the real-time temperature threshold, the heat dissipation of the cooling circuit is controlled to be reduced, so that the temperature of the cooling medium entering the converter valve is higher than the real-time temperature threshold; when the heat dissipation of the cooling circuit reaches the minimum value, but the temperature of the cooling medium entering the converter valve is still not higher than the current real-time temperature threshold, the anti-condensation device in the cooling system is controlled to work, so that the heat exchange device in the cooling circuit is short-circuited, the cooling medium entering the converter valve maintains a water resistance balance, and the temperature of the cooling medium entering the converter valve is higher than the real-time temperature threshold corresponding to the current real-time ambient temperature;

[0016] The anti-condensation device adopts the anti-condensation device described above.

[0017] Preferably, the cooling circuit includes a heat exchange device, and a discharge pipe and a return pipe connecting the heat exchange device and a converter valve.

[0018] Based on the same inventive concept, the present invention also provides a method for preventing condensation of a converter valve, comprising: using the cooling system as described above, the method comprises:

[0019] Acquire the real-time ambient temperature in the converter valve hall based on the temperature and humidity sensor in the cooling system, acquire the temperature of the cooling medium in real time based on the cooling circuit, and determine the real-time temperature threshold of the cooling medium in the converter valve according to the real-time ambient temperature;

[0020] When the temperature of the cooling medium is less than or equal to the real-time temperature threshold, the controller in the cooling system controls the heat dissipation of the cooling circuit in the cooling system to decrease, so that the temperature of the cooling medium entering the converter valve is higher than the current real-time temperature threshold;

[0021] When the heat dissipation of the cooling circuit reaches the minimum value, but the temperature of the cooling medium entering the converter valve is still not higher than the current real-time temperature threshold, the controller controls the anti-condensation device in the cooling system to short-circuit the heat exchange device in the cooling circuit, maintain the water resistance balance of the cooling medium entering the converter valve, and make the temperature of the cooling medium entering the converter valve higher than the real-time temperature threshold corresponding to the current real-time ambient temperature.

[0022] Preferably, controlling the anti-condensation device in the cooling system to work by the controller so that the heat exchange device in the cooling circuit is short-circuited, the cooling medium entering the converter valve maintains a water resistance balance, and the temperature of the cooling medium entering the converter valve is higher than a real-time temperature threshold corresponding to the current real-time ambient temperature, includes:

[0023] The controller controls the valve group in the anti-condensation device to switch the cooling medium flow path, short-circuit the heat exchange device, and allow the cooling medium to flow back to the converter valve through the short-circuit line in the anti-condensation device to form an internal circulation loop. The water resistance balancing device in the anti-condensation device keeps the water resistance balanced before and after the cooling medium flow path is switched. At the same time, the heating device in the anti-condensation device is controlled to heat the cooling medium in the short-circuit line, so that the temperature of the cooling medium entering the converter valve is higher than the real-time temperature threshold corresponding to the current real-time ambient temperature. Until the temperature of the cooling medium reaches the maximum temperature threshold, the anti-condensation device is controlled to stop working.

[0024] Based on the same inventive concept, the present invention also provides a converter valve anti-condensation system, which adopts the cooling system as described above, and comprises:

[0025] A data acquisition module, used to acquire the real-time ambient temperature in the valve hall of the converter valve based on the temperature and humidity sensor in the cooling system, and to acquire the temperature of the cooling medium in real time based on the cooling circuit, and to determine the real-time temperature threshold of the cooling medium in the converter valve according to the real-time ambient temperature;

[0026] A cooling circuit control module, configured to control the cooling circuit in the cooling system to reduce the heat dissipation through a controller in the cooling system when the temperature of the cooling medium is less than or equal to the real-time temperature threshold, so that the temperature of the cooling medium entering the converter valve is higher than the current real-time temperature threshold;

[0027] The anti-condensation device control module is used to control the anti-condensation device in the cooling system through the controller when the heat dissipation of the cooling circuit reaches a minimum value but the temperature of the cooling medium entering the converter valve is still not higher than the current real-time temperature threshold, so as to short-circuit the heat exchange device in the cooling circuit, maintain water resistance balance for the cooling medium entering the converter valve, and make the temperature of the cooling medium entering the converter valve higher than the real-time temperature threshold corresponding to the current real-time ambient temperature.

[0028] Preferably, the anti-condensation device control module is specifically used for:

[0029] The controller controls the valve group in the anti-condensation device to switch the cooling medium flow path, short-circuit the heat exchange device, and allow the cooling medium to flow back to the converter valve through the short-circuit line in the anti-condensation device to form an internal circulation loop. The water resistance balancing device in the anti-condensation device keeps the water resistance balanced before and after the cooling medium flow path is switched. At the same time, the heating device in the anti-condensation device is controlled to heat the cooling medium in the short-circuit line, so that the temperature of the cooling medium entering the converter valve is higher than the real-time temperature threshold corresponding to the current real-time ambient temperature. Until the temperature of the cooling medium reaches the maximum temperature threshold, the anti-condensation device is controlled to stop working.

[0030] Based on the same inventive concept, the present invention also provides a computer device, including: one or more processors;

[0031] A memory for storing one or more programs;

[0032] When the one or more programs are executed by the one or more processors, a method for preventing condensation of a converter valve as described above is implemented.

[0033] Based on the same inventive concept, the present invention further provides a computer-readable storage device having a computer program stored thereon, and when the computer program is executed, a method for preventing condensation of a converter valve as described above is implemented.

[0034] Compared with the closest prior art, the present invention has the following beneficial effects:

[0035] The present invention provides a converter valve anti-condensation device and a cooling system, the device comprising: a valve group, a short-circuit connected to the valve group, a heating device and a water resistance balancing device arranged on the short-circuit; the valve group and the short-circuit constitute a branch connected between a discharge pipe and a return pipe of a cooling circuit of the converter valve; the device and the system can, through the arrangement of the valve group, short-circuit an outdoor heat exchange device through the short-circuit when the outdoor ambient temperature is low, switch the valve cooling system to an internal circulation mode to avoid further decrease in the temperature of the cooling medium; and by adding a heating device to the short-circuit pipeline, further heat the cooling medium temperature to keep away from the condensation point, thereby preventing condensation from occurring in the converter valve when the air conditioning system of the converter valve fails; in addition, the heating device is arranged on the short-circuit to avoid adding equipment to the cooling circuit to generate additional water resistance, and the heating device plus the water resistance balancing device can be used to balance the water resistance, and when the valve group is switched to the internal circulation operation, the water resistance on the short-circuit is ensured to be consistent with the water resistance of the original heat exchange device, thereby avoiding large fluctuations in the flow of the valve cooling system;

[0036] The present invention also provides a converter valve anti-condensation method and system, comprising obtaining the real-time ambient temperature in the converter valve hall based on the temperature and humidity sensor in the cooling system, and obtaining the temperature of the cooling medium in real time based on the cooling circuit, and determining the real-time temperature threshold of the cooling medium in the converter valve according to the real-time ambient temperature; when the temperature of the cooling medium is less than or equal to the real-time temperature threshold, controlling the heat dissipation of the cooling circuit in the cooling system to be reduced by a controller in the cooling system, so that the temperature of the cooling medium entering the converter valve is higher than the current real-time temperature threshold; when the heat dissipation of the cooling circuit reaches the minimum value, but the temperature of the cooling medium entering the converter valve is still not higher than the current real-time temperature threshold When the temperature reaches the real-time temperature threshold, the controller controls the anti-condensation device in the cooling system to work, so that the heat exchange device in the cooling circuit is short-circuited, the cooling medium entering the converter valve maintains a water resistance balance, and the temperature of the cooling medium entering the converter valve is higher than the real-time temperature threshold corresponding to the current real-time ambient temperature; the method and system realize two-level anti-condensation control by controlling the cooling circuit and the anti-condensation device, wherein the anti-condensation device is controlled to switch to the internal circulation mode, which can completely cut off the natural heat dissipation of the heat exchange device, ensure that the heat dissipation of the heat exchange device and the heating capacity of the anti-condensation device do not conflict with each other, and effectively control the temperature of the cooling medium, thereby preventing condensation from occurring in the converter valve when the air-conditioning system of the converter valve fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of the structure of a converter valve anti-condensation device and a cooling system provided by the present invention;

[0038] Figure 2 A schematic flow chart of a method for preventing condensation of a converter valve provided by the present invention;

[0039] Figure 3A schematic structural diagram of a converter valve anti-condensation system provided by the present invention;

[0040] Figure 4 A schematic diagram of the structure of an electronic device provided by the present invention;

[0041] Among them, 1. short-circuit pipe; 2. valve group; 3. converter valve; 4. heat exchange device; 5. converter valve hall; 6. temperature and humidity sensor; 7. orifice plate; 8. drain pipe; 9. return pipe; 10. heating device. DETAILED DESCRIPTION

[0042] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0043] Embodiment 1:

[0044] The present invention provides a converter valve anti-condensation device, such as Figure 1 As shown, it includes: a valve group 2, a short-circuit 1 connected to the valve group 2, a heating device 10 and a water resistance balancing device arranged on the short-circuit 1; the valve group 2 and the short-circuit 1 form a branch connected between the discharge pipe 8 and the return pipe 9 of the cooling circuit of the converter valve 3.

[0045] Considering that when the air-conditioning system fails and the cooling capacity is less than the heat dissipated by the indoor electrical equipment, the indoor temperature will rise rapidly and cause the higher temperature air in the valve hall to condense on the colder pipes. The condensation on the cooling pipe inside the converter valve will cause the insulation of the converter valve equipment to decrease, resulting in flashover and other phenomena, endangering the safety of the equipment. Therefore, the device switches the cooling medium flow path through the valve group 2, so that the cooling medium flows back to the converter valve 3 through the short-circuit line 1, short-circuits the heat exchange device 4 in the cooling circuit, and the water resistance balancing device keeps the water resistance balanced before and after the cooling medium flow path is switched; further, by setting the valve group 2, when the outdoor ambient temperature is low, the outdoor heat exchange device 4 can be short-circuited through the short-circuit line 1, and the valve cooling system can be switched to the internal circulation mode to avoid further decrease in the cooling medium temperature; and by adding a heating device 10 to the short-circuit pipe 1, the cooling medium temperature can be further heated to keep away from the condensation point, thereby preventing condensation from occurring in the converter valve 3 when the air-conditioning system of the converter valve 3 fails; in addition, the heating device 10 is arranged on the short-circuit line 1 to avoid adding equipment to the cooling circuit to generate additional water resistance, and the heating device 10 plus the water resistance balancing device can be used to balance the water resistance. When the valve group 2 is switched to the internal circulation operation, the water resistance on the short-circuit line 1 is ensured to be consistent with the original water resistance of the heat exchange device 4, thereby avoiding large fluctuations in the flow of the valve cooling system.

[0046] In this embodiment, the valve group 2 includes a three-way valve, which has a water inlet and two water outlets. The water inlet of the three-way valve is connected to the water outlet of the converter valve 3, and the two water outlets of the three-way valve are respectively connected to the short-circuit pipe 1 and the heat exchange device 4 in the cooling circuit, and the water outlet states of the two water outlets of the three-way valve are mutually exclusive.

[0047] In another possible implementation, the valve group 2 may further include a multi-way reversing valve, which is configured in the form of a water inlet and two water outlets to realize the function of the valve group 2.

[0048] It should be noted that a three-way valve is added to the pipeline from the valve cooling system to the outdoor air cooler, i.e., the heat exchange device 4, i.e., the discharge pipe 8, for controlling the flow path of the cooling medium. When the outdoor ambient temperature is low, the valve cooling system can be switched to an internal circulation mode to prevent the water temperature from further decreasing. The end of the short-circuit 1 away from the valve group 2 is connected to the return pipe 9; a heating device 10 is provided on the air cooler short-circuit 1 for heating the valve cooling medium, i.e., the cooling medium, so as to regulate the temperature of the cooling medium to keep it away from the condensation point; the water resistance balancing device is provided on the air cooler short-circuit 1 for adjusting the water resistance of the short-circuit 1. Since the water resistance balancing device is provided on the short-circuit 1, it does not affect the water flow state in the cooling circuit under normal conditions. When the water circuit is switched, the water resistance of the short-circuit can be increased in time to ensure a smooth transition of the water flow.

[0049] In this embodiment, Figure 1 As shown, the three-way valve adopts a combination of valve one and valve two, one end of valve one and valve two are connected, serving as a water inlet of the three-way valve; the other end of valve one serves as a water outlet of the three-way valve, connected to the heat exchange device 4 through the discharge pipe 8; the other end of valve two serves as a water outlet of the three-way valve, connected to the short-circuit line 1; valve one and valve two are both controlled by a control device M, and the control device M is electrically connected to the controller not shown in the figure, and the valve opening and closing states of valve one and valve two are mutually exclusive, so as to realize the mutual exclusion of the water outlet states of the two water outlets of the three-way valve.

[0050] In another possible implementation, the three-way valve may also be a three-way solenoid valve.

[0051] In this embodiment, the water resistance balancing device includes a orifice plate 7 arranged in the short-circuit pipe 1.

[0052] In this embodiment, a central through hole is formed on the orifice plate 7 .

[0053] In this embodiment, the diameter of the central through hole is calculated according to the change in the water resistance balance requirement, and is expressed as:

[0054]

[0055] Wherein, P1 is the change in water resistance balance demand, P2 is the water resistance of the heat exchange device 4 at rated flow, P3 is the water resistance of the cooling circuit at rated flow, P4 is the water resistance of the heating device 10, ξ is the local resistance coefficient of the orifice plate 7; v is the water flow velocity; g is the acceleration of gravity; D is the inner diameter of the short-circuit pipe 1; and d is the aperture of the central through hole.

[0056] It should be noted that the aperture of the orifice plate 7 remains unchanged when the anti-condensation method is running. Only when the heat exchange device 4 or the heating device 10 is replaced, resulting in a change in the water resistance of the heat exchange device 4 or the heating device 10, the aperture of the orifice plate 7 is recalculated and the orifice plate of the corresponding aperture is replaced. Therefore, the existence of the orifice plate 7 does not affect the normal operation of the cooling circuit.

[0057] In another possible implementation, the water resistance balancing device may further include a flow regulating valve disposed in the short-circuit pipe 1, and the opening of the flow regulating valve is determined according to the change in the water resistance balancing requirement, and specific reference may be made to the method for obtaining the aperture of the central through hole of the orifice plate 7. After the opening of the flow regulating valve is adjusted, the opening remains unchanged when the anti-condensation method is running, and only when the heat exchange device 4 or the heating device 10 is replaced, resulting in a change in the water resistance of the heat exchange device 4 or the heating device 10, the opening of the flow regulating valve is recalculated and adjusted.

[0058] In this embodiment, the heating device 10 includes an electric heater arranged on the short-circuit tube 1 .

[0059] In this embodiment, the electric heater is arranged near the inlet of the converter valve 3, that is, the end of the short-circuit line 1 away from the valve group 2, which can more quickly adjust the temperature of the cooling medium entering the converter valve; in addition, the electric heater is arranged on the short-circuit line 1 to avoid adding equipment to the main line, that is, the cooling circuit, to generate additional water resistance.

[0060] It should be noted that, since the electric heater is arranged in the short-circuit 1, there is no need to consider the influence of the electric heater on the water resistance of the cooling circuit, nor is there any need to consider the impact or corrosion on the electric heater during the daily operation of the cooling circuit. Therefore, the electric heater can be arranged on the inner wall or outer wall of the short-circuit 1; preferably, the electric heater is arranged on the inner wall of the short-circuit 1. At this time, the heating effect of the electric heater on the cooling medium in the short-circuit 1 is more direct and rapid, further avoiding the risk of condensation in the internal pipeline of the converter valve.

[0061] It should be noted that when the electric heater is arranged on the outer wall of the short-circuit pipe 1, the water resistance of the heating device 10 in the above-mentioned water resistance balance demand change calculation formula is 0.

[0062] In this embodiment, the short-circuit tube 1 is arranged in an indoor environment.

[0063] In this embodiment, the converter valve 3 is arranged in the converter valve hall 5, the short-circuit line 1, a part of the discharge pipe 8 and the return pipe 9 connecting the converter valve 3 and the short-circuit line 1 are all arranged in the equipment room next to the converter valve hall 5, which is in an indoor environment. After the valve cooling system is switched to the internal circulation mode, it can isolate the outdoor cold air and prevent the temperature of the cooling medium in the pipeline from further decreasing.

[0064] When the device is in use, when the valve cooling system, i.e., the cooling system, detects through internal sensors that the temperature of the cooling medium is close to the dew point, the valve cooling system temperature control adds anti-condensation logic, that is, the air cooler fans in the heat exchange device 4 are controlled to be closed group by group, the three-way valve is introduced into the indoor circulation mode, and the electric heater is started, etc., so as to control the cooling medium temperature of the converter valve not to be lower than the dew point temperature.

[0065] Embodiment 2:

[0066] Based on the same inventive concept, the present invention also provides a converter valve anti-condensation cooling system, such as Figure 1 As shown, it includes: a cooling circuit, an anti-condensation device arranged on the cooling circuit, a temperature and humidity sensor 6 arranged in the main exhaust duct of the converter valve hall 5, and a controller, wherein the controller is electrically connected to the cooling circuit, the anti-condensation device and the temperature and humidity sensor 6;

[0067] The controller is used to obtain the real-time ambient temperature in the converter valve hall 5 based on the temperature and humidity sensor 6, and to obtain the temperature of the cooling medium in real time based on the cooling circuit, and to determine the real-time temperature threshold of the cooling medium in the converter valve 3 according to the real-time ambient temperature; when the temperature of the cooling medium is less than or equal to the real-time temperature threshold, the heat dissipation of the cooling circuit is controlled to be reduced, so that the temperature of the cooling medium entering the converter valve 3 is higher than the real-time temperature threshold; when the heat dissipation of the cooling circuit reaches the minimum value, but the temperature of the cooling medium entering the converter valve 3 is still not higher than the current real-time temperature threshold, the anti-condensation device in the cooling system is controlled to work, so that the heat exchange device 4 in the cooling circuit is short-circuited, the cooling medium entering the converter valve 3 maintains a water resistance balance, and the temperature of the cooling medium entering the converter valve 3 is higher than the real-time temperature threshold corresponding to the current real-time ambient temperature;

[0068] The anti-condensation device adopts the anti-condensation device in the above embodiment.

[0069] In this embodiment, the above-mentioned temperature and humidity instrument, i.e., the temperature and humidity sensor 6, is used to monitor and calculate the dew point of the converter valve hall 5; there are two temperature and humidity sensors 6, and two sets of temperature and humidity radiators are installed in the air-conditioning exhaust duct of the converter valve hall 5, i.e., the main exhaust duct, which can avoid the sensor being installed in the blind corner area of ​​the valve hall, thereby better monitoring the overall temperature and humidity conditions of the converter valve hall 5.

[0070] In this embodiment, the cooling circuit includes a heat exchange device 4 , and a discharge pipe 8 and a return pipe 9 connecting the heat exchange device 4 and the converter valve 3 .

[0071] Embodiment 3:

[0072] Based on the same inventive concept, the present invention also provides a method for preventing condensation of a converter valve, such as Figure 2 As shown, using the cooling system in the above embodiment, the method includes:

[0073] S1. Acquire the real-time ambient temperature in the converter valve hall 5 based on the temperature and humidity sensor 6 in the cooling system, acquire the temperature of the cooling medium in real time based on the cooling circuit, and determine the real-time temperature threshold of the cooling medium in the converter valve 3 according to the real-time ambient temperature;

[0074] S2. When the temperature of the cooling medium is less than or equal to the real-time temperature threshold, the controller in the cooling system controls the heat dissipation of the cooling circuit in the cooling system to reduce so that the temperature of the cooling medium entering the converter valve 3 is higher than the current real-time temperature threshold;

[0075] S3. When the heat dissipation of the cooling circuit reaches the minimum value, but the temperature of the cooling medium entering the converter valve 3 is still not higher than the current real-time temperature threshold, the anti-condensation device in the cooling system is controlled by the controller to short-circuit the heat exchange device 4 in the cooling circuit, maintain the water resistance balance of the cooling medium entering the converter valve 3, and make the temperature of the cooling medium entering the converter valve 3 higher than the real-time temperature threshold corresponding to the current real-time ambient temperature.

[0076] The method realizes two-stage anti-condensation control by controlling the cooling circuit and the anti-condensation device, wherein the anti-condensation device is controlled to switch to the internal circulation mode, which can completely cut off the natural heat dissipation of the heat exchange device, ensure that the heat dissipation of the heat exchange device and the heating capacity of the anti-condensation device do not conflict with each other, and effectively control the temperature of the cooling medium, thereby preventing condensation from occurring in the converter valve when the air-conditioning system of the converter valve fails.

[0077] Furthermore, the present invention optimizes the process flow of the valve cooling system and supplements and optimizes the anti-condensation control logic in the valve cooling temperature control design. This can effectively ensure that when the refrigeration capacity of the valve hall air-conditioning system is insufficient, the valve cooling system can prevent condensation from forming on the converter valve pipeline while meeting the heat dissipation capacity of the converter valve. This can prevent condensation from causing reduced insulation of the converter valve equipment and causing flashover and other phenomena that endanger equipment safety, thereby improving the overall reliability of the converter valve.

[0078] Specifically, in the above S1, the temperature and humidity in the converter valve hall 5 are monitored by the temperature and humidity sensor 6. There are two temperature and humidity sensors 6. Two sets of temperature and humidity radiators are installed in the air-conditioning exhaust duct of the converter valve hall 5, that is, in the main exhaust duct. This can avoid the sensor being installed in the blind spot area of ​​the valve hall, thereby better monitoring the overall temperature and humidity conditions of the converter valve hall 5.

[0079] In this embodiment, the temperature of the cooling medium in the pipeline is monitored by temperature sensors inside the cooling circuit and the short-circuit pipeline 1 .

[0080] Considering that the situation where the air conditioning system fails for a long time and no one repairs it is quite extreme, in the above S2, there are two levels of implementation methods for controlling the heat dissipation reduction of the cooling circuit in the cooling system. The first level implementation method is: when the valve cooling system monitors the valve cooling medium temperature through the temperature sensor, that is, the temperature of the cooling medium is close to the dew point temperature of the valve hall, the valve cooling system temperature control will add anti-condensation control logic, such as reducing the power (fan speed) of the heat exchange device 4, that is, the air cooler; the valve cooling system temperature control target will be adjusted to increase the medium temperature to keep it above the real-time temperature threshold without exceeding the tripping temperature to avoid condensation;

[0081] When the anti-condensation control logic is added, that is, after taking measures such as reducing the power of the heat exchange device 4, if the cooling medium temperature still cannot be maintained above the real-time temperature threshold, the second level implementation method is executed, including: the valve cooling system, that is, the cooling system, will shut down the air cooler fans group by group, and gradually reduce the heat dissipation capacity of the valve cooling system until all the air cooler fans are shut down. At this time, the heat dissipation of the valve cooling system, that is, the cooling system, reaches the minimum value.

[0082] It should be noted that the dew point temperature increases with the increase of the real-time ambient temperature. Considering that when the temperature of the cooling medium entering the converter valve 3 is equal to the current dew point temperature, it cannot be guaranteed that there will be no condensation. When the temperature of the cooling medium is too high, the valve cooling system will trip. Therefore, for example, the real-time dew point temperature in the converter valve hall 5 is determined according to the real-time ambient temperature, and the real-time dew point temperature plus 3°C is used as the real-time temperature threshold. In the above S2, the heat dissipation of the cooling circuit in the cooling system is controlled to be reduced, so that the temperature of the cooling medium entering the converter valve 3 is higher than the current dew point temperature + 3°C, so as to ensure that condensation is avoided.

[0083] In this embodiment, when controlling the anti-condensation device in the cooling system to work, the above S3 may include:

[0084] The controller controls the valve group 2 in the anti-condensation device to switch the cooling medium flow path, short-circuit the heat exchange device 4, and make the cooling medium flow back to the converter valve 3 through the short-circuit line 1 in the anti-condensation device to form an internal circulation loop. The water resistance balancing device in the anti-condensation device keeps the water resistance balanced before and after the cooling medium flow path is switched; at the same time, the heating device 10 in the anti-condensation device is controlled to heat the cooling medium in the short-circuit line 1, so that the temperature of the cooling medium entering the converter valve 3 is higher than the real-time temperature threshold corresponding to the current real-time ambient temperature; until the temperature of the cooling medium reaches the maximum temperature threshold, the anti-condensation device is controlled to stop working.

[0085] Specifically, after all the fans of the air cooler are shut down, if the condensation temperature continues to rise, the valve cooling system is switched to the indoor circulation mode through valve group 2 to completely cut off the natural heat dissipation of the air cooler. Finally, the valve cooling medium is heated by means of an electric heater to further increase the valve cooling temperature. When the cooling medium temperature approaches the tripping temperature within 1°C, the electric heater is stopped. If the condensation point temperature further rises and approaches the cooling medium temperature within 1°C, the valve cooling system sends a tripping signal. By controlling the temperature of the valve cooling system in the above order, it can be ensured that the valve cooling heat dissipation and heating capacity do not conflict with each other, and the valve cooling medium temperature can be effectively controlled.

[0086] Embodiment 4:

[0087] Based on the same inventive concept, the present invention also provides a converter valve anti-condensation system, such as Figure 3 As shown, the cooling system in the above embodiment is adopted, and the system includes:

[0088] A data acquisition module, used to acquire the real-time ambient temperature in the converter valve hall 5 based on the temperature and humidity sensor 6 in the cooling system, and to acquire the temperature of the cooling medium in real time based on the cooling circuit, and to determine the real-time temperature threshold of the cooling medium in the converter valve 3 according to the real-time ambient temperature;

[0089] A cooling circuit control module, which is used to control the cooling circuit in the cooling system to reduce the heat dissipation through the controller in the cooling system when the temperature of the cooling medium is less than or equal to the real-time temperature threshold, so that the temperature of the cooling medium entering the converter valve 3 is higher than the current real-time temperature threshold;

[0090] The anti-condensation device control module is used to control the anti-condensation device in the cooling system through the controller when the heat dissipation of the cooling circuit reaches the minimum value but the temperature of the cooling medium entering the converter valve 3 is still not higher than the current real-time temperature threshold, so that the heat exchange device 4 in the cooling circuit is short-circuited, the cooling medium entering the converter valve 3 maintains water resistance balance, and the temperature of the cooling medium entering the converter valve 3 is higher than the real-time temperature threshold corresponding to the current real-time ambient temperature.

[0091] In this embodiment, the anti-condensation device control module is specifically used for:

[0092] The controller controls the valve group 2 in the anti-condensation device to switch the cooling medium flow path, short-circuit the heat exchange device 4, and make the cooling medium flow back to the converter valve 3 through the short-circuit line 1 in the anti-condensation device to form an internal circulation loop. The water resistance balancing device in the anti-condensation device keeps the water resistance balanced before and after the cooling medium flow path is switched; at the same time, the heating device 10 in the anti-condensation device is controlled to heat the cooling medium in the short-circuit line 1, so that the temperature of the cooling medium entering the converter valve 3 is higher than the real-time temperature threshold corresponding to the current real-time ambient temperature; until the temperature of the cooling medium reaches the maximum temperature threshold, the anti-condensation device is controlled to stop working.

[0093] Embodiment 5:

[0094] like Figure 4 As shown, the present invention also provides an electronic device, which may be a computer device, a single-chip device, an intelligent mobile device, etc. The electronic device in this embodiment may include a processor, a memory, a transceiver component, etc. The memory, the processor, and the transceiver component are connected via a bus; the memory may be used to store an execution program, and an exemplary execution program may include instructions; the processor is used to execute the instructions stored in the memory. The memory may also be used to store data, which may be called and / or modified when the instructions are executed.

[0095] The processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. It is the computing core and control core of the terminal, which is suitable for implementing one or more instructions, and is specifically suitable for loading and executing one or more instructions in a storage medium to implement a corresponding method flow or a corresponding function, so as to implement the steps of a method for preventing condensation of a converter valve in the above-mentioned embodiment.

[0096] Embodiment 6:

[0097] Based on the same inventive concept, the present invention also provides a readable storage device, specifically an electronic device readable storage medium (Memory), which is a memory device in an electronic device for storing programs and data. It can be understood that the storage medium here can include both built-in storage media in the electronic device and, of course, extended storage media supported by the electronic device. The storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and these instructions can be one or more execution programs (including program codes). It should be noted that the storage medium here can be a high-speed RAM memory or a non-volatile memory, such as at least one disk memory. The processor loads and executes one or more instructions stored in the storage medium, which can implement the steps of a method for preventing condensation of a converter valve in the above embodiment.

[0098] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0099] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0100] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0101] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the application, but these changes, modifications or equivalent substitutions are all within the protection scope of the claims of the present invention.

Claims

1. A converter valve anti-condensation device, characterized in that: include: A valve group (2), a short-circuit (1) connected to the valve group (2), a heating device (10) and a water resistance balancing device arranged on the short-circuit (1); the valve group (2) and the short-circuit (1) form a branch connected between a discharge pipe (8) and a return pipe (9) of a cooling circuit of a converter valve (3).

2. A converter valve anti-condensation device according to claim 1, characterized in that: The valve group (2) comprises a three-way valve, the three-way valve having a water inlet and two water outlets, the water inlet of the three-way valve being connected to the water outlet of the converter valve (3), the two water outlets of the three-way valve being respectively connected to the short-circuit pipe (1) and the heat exchange device (4) in the cooling circuit, and the water outlet states of the two water outlets of the three-way valve being mutually exclusive.

3. A converter valve anti-condensation device according to claim 1 or 2, characterized in that: The water resistance balancing device comprises an orifice plate (7) arranged in the short-circuit pipe (1).

4. A converter valve anti-condensation device according to claim 3, characterized in that: The orifice plate (7) is provided with a central through hole.

5. A converter valve anti-condensation device according to claim 4, characterized in that: The diameter of the central through hole is calculated according to the change in the water resistance balance requirement, and is expressed as: Wherein, P1 is the change in water resistance balance demand, P2 is the water resistance of the heat exchange device (4) at the rated flow rate, P3 is the water resistance of the cooling circuit at the rated flow rate, P4 is the water resistance of the heating device (10), ξ is the local resistance coefficient of the orifice plate (7); v is the water flow velocity; g is the acceleration of gravity; D is the inner diameter of the short-circuit pipe (1); and d is the aperture of the central through hole.

6. A converter valve anti-condensation device according to claim 1 or 2, characterized in that: The heating device (10) comprises an electric heater arranged on the short-circuit tube (1).

7. A converter valve anti-condensation device according to claim 1 or 2, characterized in that: The short-circuit tube (1) is arranged in an indoor environment.

8. A converter valve anti-condensation cooling system, characterized in that: include: A cooling circuit, an anti-condensation device arranged on the cooling circuit, a temperature and humidity sensor (6) arranged in a main exhaust duct of a converter valve hall (5), and a controller, wherein the controller is electrically connected to the cooling circuit, the anti-condensation device and the temperature and humidity sensor (6); The controller is used to obtain the real-time ambient temperature in the converter valve hall (5) based on the temperature and humidity sensor (6), and to obtain the temperature of the cooling medium in real time based on the cooling circuit, and to determine the real-time temperature threshold of the cooling medium in the converter valve (3) according to the real-time ambient temperature; when the temperature of the cooling medium is less than or equal to the real-time temperature threshold, the heat dissipation of the cooling circuit is controlled to be reduced, so that the temperature of the cooling medium entering the converter valve (3) is higher than the real-time temperature threshold; when the heat dissipation of the cooling circuit reaches a minimum value, but the temperature of the cooling medium entering the converter valve (3) is still not higher than the current real-time temperature threshold, the anti-condensation device in the cooling system is controlled to operate, so that the heat exchange device (4) in the cooling circuit is short-circuited, the cooling medium entering the converter valve (3) maintains a water resistance balance, and the temperature of the cooling medium entering the converter valve (3) is higher than the real-time temperature threshold corresponding to the current real-time ambient temperature; The anti-condensation device adopts the anti-condensation device as described in any one of claims 1-7.

9. The anti-condensation cooling system for a converter valve according to claim 8, characterized in that: The cooling circuit comprises a heat exchange device (4), and a discharge pipe (8) and a return pipe (9) connecting the heat exchange device (4) and the converter valve (3).

10. A method for preventing condensation of a converter valve, characterized in that: Using the cooling system according to any one of claims 8 to 9, the method comprises: Based on the temperature and humidity sensor (6) in the cooling system, the real-time ambient temperature in the converter valve hall (5) is obtained, and based on the cooling circuit, the temperature of the cooling medium is obtained in real time, and the real-time temperature threshold of the cooling medium in the converter valve (3) is determined according to the real-time ambient temperature; When the temperature of the cooling medium is less than or equal to the real-time temperature threshold, the controller in the cooling system controls the cooling circuit in the cooling system to reduce the heat dissipation, so that the temperature of the cooling medium entering the converter valve (3) is higher than the current real-time temperature threshold; When the heat dissipation of the cooling circuit reaches the minimum value, but the temperature of the cooling medium entering the converter valve (3) is still not higher than the current real-time temperature threshold, the controller controls the anti-condensation device in the cooling system to operate, so that the heat exchange device (4) in the cooling circuit is short-circuited, the cooling medium entering the converter valve (3) maintains a water resistance balance, and the temperature of the cooling medium entering the converter valve (3) is higher than the real-time temperature threshold corresponding to the current real-time ambient temperature.

11. A method for preventing condensation of a converter valve according to claim 10, characterized in that: The controller controls the anti-condensation device in the cooling system to operate, so that the heat exchange device (4) in the cooling circuit is short-circuited, the cooling medium entering the converter valve (3) maintains a water resistance balance, and the temperature of the cooling medium entering the converter valve (3) is higher than a real-time temperature threshold corresponding to the current real-time ambient temperature, including: The controller controls the valve group (2) in the anti-condensation device to switch the cooling medium flow path, short-circuit the heat exchange device (4), and allow the cooling medium to flow back to the converter valve (3) through the short-circuit line (1) in the anti-condensation device to form an internal circulation loop. The water resistance balancing device in the anti-condensation device keeps the water resistance balanced before and after the cooling medium flow path is switched. At the same time, the heating device (10) in the anti-condensation device is controlled to heat the cooling medium in the short-circuit line (1), so that the temperature of the cooling medium entering the converter valve (3) is higher than the real-time temperature threshold corresponding to the current real-time ambient temperature. Until the temperature of the cooling medium reaches the maximum temperature threshold, the anti-condensation device is controlled to stop working.

12. An electronic device, characterized in that: include: at least one processor and memory; The memory and the processor are connected via a bus; The memory is used to store one or more programs; When the one or more programs are executed by the at least one processor, a method for preventing condensation of a converter valve as claimed in any one of claims 10 to 11 is implemented.

13. A readable storage device, characterized in that: An execution program is stored thereon, and when the execution program is executed, a method for preventing condensation of a converter valve as described in any one of claims 10 to 11 is implemented.

Images