Efficient intelligent control wind driven generator converter cooling system and method

Abstract

The efficient intelligent control wind driven generator converter cooling system comprises a lower layer heating element and an upper layer heating element which are arranged in a converter cabinet, a wind dispelling pipeline is located outside the converter cabinet and connected with the converter cabinet and a cooling air conditioner, and an upper layer temperature controller and a lower layer temperature controller are arranged on the upper layer and the lower layer of the converter cabinet respectively. An electric shutter is arranged at the top of the converter cabinet; and a lower-layer air inlet control shutter and an upper-layer air inlet control shutter are respectively arranged at two joints of the wind dispelling pipeline and the converter cabinet. The temperature controller is triggered through preset conditions to trigger corresponding control actions, so that stable operation of the system under various environmental conditions is ensured, the damage frequency of a heating element is reduced through point-to-point cooling, the purposes of optimal cooling and cost saving are achieved, dust and impurities in air are prevented from entering a converter cabinet, and the service life of the converter cabinet is prolonged. And dust and impurities are attached to the surface of the heating element, so that serious heating or burnout is caused, and the cooling efficiency and reliability of the system are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of wind turbines, and relates to a high-efficiency intelligently controlled wind turbine converter cooling system and method. Background Art

[0002] As a new type of renewable resource, wind power generation system is developing continuously. Wind turbine system consists of wind turbine, transmission, motor, converter, etc. Among them, converter is the core component of wind turbine system, which is a high-power electronic product used to adjust the voltage and frequency of the generator, and convert the AC power generated by the generator into DC power for easy transmission and use. A lot of heat will be generated during the operation of the converter. If the heat cannot be dissipated in time, the converter will burn out and cause the fan to stop operating, which will seriously affect the operation of the fan and the quality of power transmission, and also reduce the power generation efficiency and the service life of the fan system equipment, and even cause explosion and fire accidents.

[0003] At present, the cooling systems of wind turbine converters on the market mostly adopt two methods: air cooling and water cooling. The air cooling method consists of a radiator and a fan, and the heat generated by the converter is dissipated to the surrounding environment through the fan. This method has the advantages of easy installation and no need for additional water sources and water pumps. However, due to the influence of ambient temperature and the heat dissipation efficiency of the fan, the heat dissipation effect is very unsatisfactory. In addition, when the wind speed is insufficient, the heat dissipation efficiency will also decrease, and impurities in the air will be blown into the converter cabinet, causing serious dust accumulation in the equipment and increasing the heating of the equipment. At the same time, this cooling method can only achieve a weak effect of local cooling.

[0004] The water cooling method uses a water pump to bring the cooled circulating water to the radiator of the inverter. After heat transfer, the water is cooled by an external circulating water cooling system. This method has the advantages of good heat dissipation efficiency and can adapt to various environments and load conditions. However, the water-cooled inverter is expensive and requires an external water source and water pump. Its installation and maintenance costs are high, and it is easy to have problems such as water pipe blockage, which makes maintenance extremely inconvenient. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a wind turbine converter cooling system and method with high efficiency and intelligent control, which can accurately control the temperature and humidity, improve the operating efficiency and stability of the system, and reduce energy consumption and maintenance costs.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a high-efficiency and intelligently controlled wind turbine converter cooling system, which includes a lower heating element and an upper heating element in the converter cabinet, the air vent duct is located outside the converter cabinet and is connected to the converter cabinet and the cooling air conditioner, the upper and lower layers of the converter cabinet are respectively provided with an upper temperature controller and a lower temperature controller, and the top of the converter cabinet is provided with an electric shutter; the two connection points between the air vent duct and the converter cabinet are respectively provided with a lower air inlet control shutter and an upper air inlet control shutter.

[0007] The upper layer temperature controller and the lower layer temperature controller correspond to the lower layer heating element and the upper layer heating element respectively.

[0008] The upper temperature controller is electrically connected to the cooling air conditioner, the upper air intake control shutters, the electric shutters and the dehumidifier; the lower temperature controller is electrically connected to the cooling air conditioner, the lower air intake control shutters, the electric shutters and the dehumidifier.

[0009] A lower layer plug-in filter and an upper layer plug-in filter are respectively arranged in the air vent ducts on one side of the lower layer air inlet control louver and the upper layer air inlet control louver.

[0010] The upper temperature controller and the lower temperature controller are both provided with a high temperature start setting and a low temperature shut down setting; the upper temperature controller and the lower temperature controller respectively monitor the ambient temperature of the upper heating element and the lower heating element in the converter cabinet.

[0011] The converter cabinet is also provided with a dehumidifier; the dehumidifier is an automatic dehumidification module, which automatically performs dehumidification according to the ambient humidity and the set value to ensure that the humidity in the converter cabinet is not higher than the allowable value for normal operation of the equipment.

[0012] When the upper temperature controller and the lower temperature controller simultaneously detect the low temperature closing signal, the cooling air conditioner and the electric shutters are closed at the same time.

[0013] When the upper temperature controller or the lower temperature controller detects a high temperature opening signal, the cooling air conditioner and the electric blinds are opened at the same time.

[0014] When the upper temperature controller detects a high temperature start signal, the upper air inlet control shutters are opened and the lower air inlet control shutters are closed.

[0015] When the lower temperature controller detects a high temperature start signal, the lower air inlet control shutters are opened and the upper air inlet control shutters are closed.

[0016] The main beneficial effects of the present invention are: It can effectively solve the problem of poor cooling effect of the converter system of air-cooled wind turbine generator sets and reduce the frequency of damage to important high-power equipment.

[0017] The plug-in filter design greatly improves the efficiency of on-site maintenance and cleaning work. It can be reused, reducing labor and spare parts costs.

[0018] This solves the problem that traditional cooling methods cannot achieve point-to-point cooling purposes.

[0019] The control logic is clear, which improves the cooling effect of the cooling system and reduces energy consumption.

[0020] The purpose of purifying the external cooling air is achieved, dust and impurities entering the converter cabinet are reduced, and the air quality inside the converter cabinet is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 It is a control flow chart of the present invention.

[0024] Figure 3 Output node diagram for the temperature controller of the present invention.

[0025] In the figure: cooling air conditioner 1; ventilation duct 2; lower layer plug-in filter 3; upper layer plug-in filter 4; lower layer air inlet control shutter 5; upper layer air inlet control shutter 6; upper layer temperature controller 7; lower layer temperature controller 8; electric shutter 9; lower layer heating element 10; upper layer heating element 11; dehumidifier 12; inverter cabinet 13. DETAILED DESCRIPTION

[0026] like Figure 1~Figure 3In the invention, a high-efficiency intelligently controlled wind turbine converter cooling system is disclosed, which comprises an air vent duct 2 and a cooling air conditioner 1 installed on the outside of an air-cooled converter cabinet 13 of a wind turbine generator set. The cooling gas generated by the cooling air conditioner 1 passes through the air vent duct 2. Under the control of an upper temperature controller 7 and a lower temperature controller 8, the lower air inlet control louver 5, the upper air inlet control louver 6 and the electric louver 9 on the top of the converter cabinet are controlled in accordance with a designed start-up sequence, thereby cooling the upper heating element 11 and the lower heating element 10 in the converter cabinet 13. At the same time, the lower plug-in filter 3 and the upper plug-in filter 4 filter the cooling air coming out of the cooling air conditioner 1, thereby ensuring the air quality in the converter cabinet 13. The dehumidifier 12 can control the humidity in the cabinet according to the set value. This design takes all factors into consideration and greatly reduces costs compared to water-cooled units. It also centrally cools the upper and lower heating elements in the converter cabinet in a targeted manner. The filter is easy to remove. Using this design can greatly reduce the dust entering the converter cabinet and the serious heating caused by dust adhering to electrical components. At the same time, it brings convenience to maintenance personnel in cleaning and replacing filters.

[0027] Embodiment 1, The cooling air conditioner 1 is the only cooling source for the converter cabinet of the wind turbine generator and is an independent device installed outside the converter cabinet 13 to facilitate daily maintenance and repair.

[0028] The upper temperature controller 7 and the lower temperature controller 8 are the core components of the whole system. The high temperature start setting value and the low temperature shut down setting value can be set inside these two controllers. When the ambient temperature reaches the high temperature start setting value, the normally open auxiliary contact of the temperature controller is closed, and the lower air inlet control shutter 5 or the upper air inlet control shutter 6, the electric shutter 9 at the top of the converter cabinet and the cooling air conditioner 1 are started according to the control process.

[0029] The ventilation duct is made of stainless steel, which has good corrosion resistance and high temperature resistance and is suitable for use in harsh climatic conditions.

[0030] When the ambient temperature is lower than the upper temperature controller 7 or the lower temperature controller 8, the upper air inlet control shutter 6 or the lower air inlet control shutter 5 will be closed. If both temperature controllers detect that the ambient temperature is lower than the low temperature closing set value, the electric shutter 9 on the top of the inverter cabinet and the cooling air conditioner 1 will be closed.

[0031] The lower air inlet control shutters 5 and the upper air inlet control shutters 6 are electrically controlled, and the start and signals come from the lower temperature controller 8 and the upper temperature controller 7. These two electric shutters are designed to automatically adjust the flow direction of cooling air and specifically cool the heating elements in the converter cabinet, thereby improving the cooling efficiency.

[0032] The dehumidifier 12 is used to control the humidity in the converter cabinet and can be automatically turned on and off according to the set humidity value to prevent short circuit failure of the internal electrical components of the converter due to excessive humidity.

[0033] The lower plug-in filter 3 and the upper plug-in filter 4 adopt an plug-in structure to ensure that the air entering the converter cabinet is effectively filtered, and less dust in the external environment enters the converter cabinet, preventing short circuit burning caused by dust accumulation on the heating element. The plug-in structure is easy to clean and replace, and can be reused after cleaning, reducing operation and maintenance work and saving labor costs.

[0034] Embodiment 2, A control method for a wind turbine inverter cooling system with efficient and intelligent control, a pair of high-temperature start normally open contacts of an upper temperature controller 7 and a lower temperature controller 8 are in a parallel output state, and jointly control the cooling air conditioner and the electric blinds at the top of the inverter cabinet, that is, after any temperature controller is actuated at high temperature, the cooling air conditioner and the electric blinds at the top of the inverter cabinet will be started, and this pair of parallel normally open contacts also control the closing of the cooling air conditioner and the electric blinds at the top of the inverter, and the cooling air conditioner and the electric blinds at the top of the inverter will only be closed when the two temperature controllers simultaneously detect the low-temperature closing signal.

[0035] Another set of normally open contacts at low temperatures of the upper temperature controller 7 and the lower temperature controller 8 respectively control the upper air inlet control louver 6 and the lower air inlet control louver 5, respectively, to control the path of the input cold air after the refrigeration system is started.

[0036] This design allows the cooling system to cool the upper or lower heating elements in the converter cabinet in a targeted manner. At the same time, the cooling system will not be confused when one temperature controller is in a high-temperature start-up state while the other temperature controller is in a low-temperature shutdown state, thereby improving the cooling and energy-saving effects.

[0037] The high temperature start setting value and low temperature shutdown setting value set by the temperature controller can be set according to the model and specifications of the specific inverter on site. Generally, the high temperature start setting value and the low temperature shutdown setting value differ by about 15°C. This allows the cooling air conditioner to get sufficient rest time after cooling from the high temperature start setting value to the low temperature shutdown setting value, avoiding the cooling air conditioner from being in a long-term operation or repeated start and stop state, reducing energy consumption while extending the service life of the cooling air conditioner.

[0038] The above-mentioned embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The embodiments and features in the embodiments of the present application can be arbitrarily combined with each other without conflict. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A high-efficiency intelligently controlled wind turbine converter cooling system, characterized by: The invention comprises a lower heating element (10) and an upper heating element (11) in a converter cabinet (13); an air vent duct (2) is located outside the converter cabinet (13) and is connected to the converter cabinet (13) and a cooling air conditioner (1); an upper temperature controller (7) and a lower temperature controller (8) are respectively arranged on the upper and lower layers of the converter cabinet (13); an electric shutter (9) is arranged on the top of the converter cabinet (13); and lower air inlet control shutters (5) and upper air inlet control shutters (6) are respectively arranged at two connection points between the air vent duct (2) and the converter cabinet (13).

2. The high-efficiency intelligently controlled wind turbine converter cooling system according to claim 1 is characterized in that: The upper temperature controller (7) and the lower temperature controller (8) correspond to the lower heating element (10) and the upper heating element (11), respectively.

3. The high-efficiency intelligently controlled wind turbine converter cooling system according to claim 1 is characterized in that: The upper temperature controller (7) is electrically connected to the cooling air conditioner (1), the upper air intake control shutter (6), the electric shutter (9) and the dehumidifier (12); and the lower temperature controller (8) is electrically connected to the cooling air conditioner (1), the lower air intake control shutter (5), the electric shutter (9) and the dehumidifier (12).

4. The high-efficiency intelligently controlled wind turbine converter cooling system according to claim 1 is characterized in that: A lower layer plug-in filter (3) and an upper layer plug-in filter (4) are respectively arranged in the air vent duct (2) on one side of the lower layer air inlet control louver (5) and the upper layer air inlet control louver (6).

5. The high-efficiency intelligently controlled wind turbine converter cooling system according to claim 1 is characterized in that: The upper temperature controller (7) and the lower temperature controller (8) are both provided with a high temperature start setting and a low temperature shut down setting; the upper temperature controller (7) and the lower temperature controller (8) respectively monitor the ambient temperature of the upper heating element (11) and the lower heating element (10) in the converter cabinet (13).

6. The high-efficiency intelligently controlled wind turbine converter cooling system according to claim 1 is characterized in that: The converter cabinet (13) is also provided with a dehumidifier (12); the dehumidifier (12) is an automatic dehumidification module, which automatically performs dehumidification according to the ambient humidity and a set value, thereby ensuring that the humidity in the converter cabinet (13) is not higher than the allowable value for normal operation of the equipment.

7. The control method of the wind turbine converter cooling system with high efficiency and intelligent control according to any one of claims 1 to 6, characterized in that: When the upper temperature controller (7) and the lower temperature controller (8) simultaneously detect a low temperature closing signal, the cooling air conditioner (1) and the electric shutter (9) are closed simultaneously.

8. The control method of the wind turbine converter cooling system with high efficiency and intelligent control according to any one of claims 1 to 6, characterized in that: When the upper temperature controller (7) or the lower temperature controller (8) detects a high temperature start signal, the cooling air conditioner (1) and the electric shutter (9) are opened simultaneously.

9. The control method of the wind turbine converter cooling system with high efficiency and intelligent control according to any one of claims 1 to 6, characterized in that: When the upper layer temperature controller (7) detects a high temperature opening signal, the upper layer air inlet control shutter (6) opens, and the lower layer air inlet control shutter (5) closes.

10. The control method of the wind turbine converter cooling system with high efficiency and intelligent control according to any one of claims 1 to 6, characterized in that: When the lower layer temperature controller (8) detects a high temperature start signal, the lower layer air inlet control shutter (5) is opened, and the upper layer air inlet control shutter (6) is closed.

Images