Heating device for wind energy converter

Abstract

The utility model discloses a heating device for a wind energy converter. The heating device comprises N heaters arranged in a cooling liquid pipeline, a wind energy converter controller, a temperature and pressure sensor and N contactors, the cooling liquid pipeline is connected between an outer circulation heat dissipation loop and an inner circulation heat dissipation loop of the wind power converter, and one end of a mains supply alternating current power supply is connected with the input end of a normally open contact of the contactor; a normally open contact output end of the contactor is connected with an input end of the heater; two ends of a mains supply alternating current power supply are connected with an output end of the heater; the heating device for the wind energy converter is connected with an internal and external circulation heat dissipation pipeline of the converter to form an integral heat dissipation pipeline, so that temperature and pressure signals in the heat dissipation pipeline can be monitored in real time; and when the temperature and heating logic in the pipeline are monitored to be abnormal, an internal heating element is used for heating until the temperature of the cooling liquid meets operation conditions, so that reliable starting operation of the converter is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of wind energy converters, in particular to a heating device for wind energy converters. Background Art

[0002] Currently, high-power wind power converters mostly use liquid cooling. Liquid cooling solutions include:

[0003] (1) Liquid cooling device inside wind power converter: referred to as internal circulation, water cooling plate, water cooling pipeline;

[0004] (2) External liquid cooling device for wind power converter: referred to as external circulation, including circulation pipelines, coolant, fan accessories and other components.

[0005] The internal and external circulations are connected to form an overall heat dissipation loop. When the wind power converter encounters low temperature environment, temperature alternation and other environments during operation, it needs to have a heating function to ensure that the coolant meets the operating conditions during the startup process.

[0006] Normally, the external circulation is provided by the client, the specifications of the heating device are single, the heating power is fixed, and some customers' external circulation does not even include a heating function. After the system is formed with the internal pipelines of wind energy converters of different specifications, the heating requirements corresponding to different power levels are different, resulting in a mismatch in heating capacity, which ultimately leads to a deterioration of the heating effect (longer heating time) or even a failure to start the machine. Utility Model Content

[0007] The technical problem to be solved by the utility model is to propose a heating device for a wind energy converter. The heating device for the wind energy converter is connected with the internal and external circulating heat dissipation pipelines of the converter to form an integral heat dissipation pipeline, which can monitor the temperature and pressure signals in the heat dissipation pipeline in real time. When the temperature in the pipeline and the heating logic are detected to be abnormal, the internal heating element is used to heat the coolant until the temperature meets the operating conditions, thereby ensuring reliable startup and operation of the converter.

[0008] In order to solve the above technical problems, the utility model provides a heating device for a wind power converter, including a coolant pipeline, N heaters and temperature and pressure sensors arranged in the coolant pipeline, a wind power converter controller, and N contactors; the coolant pipeline is connected between the external circulation heat dissipation circuit and the internal circulation heat dissipation circuit of the wind power converter, one end of the AC power supply is connected to the normally open contact input end of all contactors; the normally open contact output end of each contactor is connected to the input end of the corresponding heater, and the two ends of the AC power supply are connected to the output ends of all heaters; the output end of the temperature and pressure sensor is connected to the signal end of the wind power converter controller; the input ends of all contactor drive coils are connected to the I / O output end of the wind power converter controller; the output ends of all contactor drive coils are connected to the GND end of the wind power converter controller; a waterproof heat-conducting component layer is arranged on the outside of the N heaters, and the connecting lines of the heaters and the temperature and pressure sensors are wrapped in a waterproof casing.

[0009] Preferably, N=3, the wind energy converter controller controls the corresponding contactor to close; the AC power supply supplies power to the corresponding heater through the normally open contact of the corresponding contactor.

[0010] Preferably, the contactor is a component that is closed and disconnected according to a control signal; the contactor has at least two normally open contacts.

[0011] Preferably, the temperature and pressure sensor collects the coolant temperature and pressure signals in the coolant pipeline in real time, and transmits them to the wind energy converter controller.

[0012] Preferably, after the wind energy converter controller controls the driving coil of the corresponding contactor to be energized, the normally open contact of the corresponding contactor is closed; and the corresponding heater is maintained to work continuously until the coolant temperature meets the operating conditions.

[0013] Preferably, the heating device for the wind energy converter is installed inside a cabinet of the wind energy converter or independently installed outside a cabinet of the wind energy converter.

[0014] After adopting the above device, the heating device for wind power converter includes a coolant pipeline, N heaters arranged in the coolant pipeline, a wind power converter controller, a temperature and pressure sensor, and N contactors; the coolant pipeline is connected between the external circulation heat dissipation circuit and the internal circulation heat dissipation circuit of the wind power converter, one end of the AC power supply is connected to the normally open contact input end of the contactor; the normally open contact output end of the contactor is connected to the input end of the corresponding heater, and the two ends of the AC power supply are connected to the output end of the heater; the output end of the temperature and pressure sensor is connected to the signal end of the controller; the contactor The driving coil input end is connected to the I / O output end of the wind energy converter controller; the driving coil output end of the contactor is connected to the GND end of the wind energy converter controller; the outside of the N heaters is provided with a waterproof heat-conducting component layer and its connecting line is wrapped in a waterproof casing; the heating device of the wind energy converter is connected to the internal and external circulation heat dissipation pipeline of the converter to form an integral heat dissipation pipeline, which can monitor the temperature and pressure signals in the heat dissipation pipeline in real time; when the temperature in the pipeline and the heating logic are detected to be abnormal, the internal heating element is used to heat the coolant to meet the operating conditions, thereby ensuring reliable startup and operation of the converter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an installation structure diagram of a heating device for a wind energy converter according to the utility model;

[0016] Figure 2 This is an overall circuit diagram of a heating device for a wind energy converter according to the utility model;

[0017] Figure 3 The utility model is a working flow chart of a heating device for a wind energy converter.

[0018] 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

[0019] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0020] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] Embodiment 1

[0022] See also Figure 1 and Figure 2 , Figure 1 This is an installation structure diagram of a heating device for a wind energy converter according to the utility model. Figure 2 The utility model is an overall circuit diagram of a heating device for a wind energy converter.

[0023] The present embodiment discloses a heating device for a wind power converter, comprising a coolant pipeline 10, N heaters 12 and a temperature and pressure sensor 11 arranged in the coolant pipeline 10, a wind power converter controller 13, and N contactors; the coolant pipeline 10 is connected between the external circulation heat dissipation circuit and the internal circulation heat dissipation circuit of the wind power converter, one end of the AC power supply is connected to the normally open contact input end of all contactors; the normally open contact output end of each contactor is connected to the input end of the corresponding heater 12, and the two ends of the AC power supply are connected to the output ends of all heaters 12; the output end of the temperature and pressure sensor 11 is connected to the signal end of the wind power converter controller 13; the input ends of all contactor drive coils 14 are connected to the I / O output ends of the wind power converter controller 13; the output ends of all contactor drive coils 14 are connected to the GND end of the wind power converter controller 13; a waterproof heat-conducting component layer is arranged on the outside of the N heaters 12, and the connection lines of the heaters and the temperature and pressure sensors are wrapped in a waterproof casing.

[0024] Embodiment 2

[0025] This embodiment is based on the first embodiment. In this embodiment, N=3, the wind energy converter controller 13 controls the corresponding contactor to close; the AC power supply supplies power to the corresponding heater through the normally open contact of the corresponding contactor.

[0026] Embodiment 3

[0027] This embodiment is based on the first embodiment. In this embodiment, the contactor is a component that is closed and disconnected according to a control signal; the contactor has at least two normally open contacts.

[0028] Embodiment 4

[0029] This embodiment is based on the first embodiment. In this embodiment, the temperature and pressure sensor 11 collects the coolant temperature and pressure signals in the coolant pipeline in real time, and transmits them to the wind energy converter controller 13 .

[0030] In this embodiment, the heating device is installed inside the cabinet of the wind energy converter or independently installed outside the cabinet of the wind energy converter.

[0031] Embodiment 5

[0032] This embodiment is based on the first embodiment. In this embodiment, after the wind energy inverter controller 13 controls the driving coil of the corresponding contactor to be energized, the normally open contact of the corresponding contactor is closed; and the corresponding heater is maintained to work continuously until the coolant temperature meets the operating conditions.

[0033] See also Figure 3 After the system is powered on, the wind power converter controller 13 receives the temperature and pressure data, and the internal preset temperature threshold, pressure threshold and heating time logic are used for logical judgment:

[0034] After the original heating system is started, if the temperature, pressure data and heating time are normal, proceed directly to the subsequent command operation;

[0035] After the original heating system is started, if the feedback signal and heating logic are abnormal, the wind energy converter controller 13 controls the contactor K1 to close and start the heater R1;

[0036] The system heating logic is judged again. If the pressure is normal / the temperature is abnormal, the wind energy converter controller 13 controls the contactor K1 and the contactor K2 to close and start the heater R1 and the heater R2;

[0037] The system heating logic is judged again. If the pressure is normal / the temperature is abnormal, the wind energy converter controller 13 controls the contactors K1, K2, and K3 to close, and starts the heaters R1, R2, and R3; until the system heating logic is met, subsequent operations are performed.

[0038] The heating device for the wind energy converter is connected to the internal and external circulating heat dissipation pipelines of the converter to form an integrated heat dissipation pipeline, which can monitor the temperature and pressure signals in the heat dissipation pipeline in real time. When the temperature in the pipeline and the heating logic are detected to be abnormal, the internal heating element is used to heat the coolant until the temperature meets the operating conditions, ensuring reliable startup and operation of the converter.

[0039] The preferred embodiments of the present application are described above with reference to the accompanying drawings, but the scope of the present application is not limited thereby. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present application shall be within the scope of the present application.

Claims

1. A heating device for a wind energy converter, characterized in that: It includes a coolant pipeline, N heaters and temperature and pressure sensors arranged in the coolant pipeline, a wind power converter controller, and N contactors; the coolant pipeline is connected between the external circulation heat dissipation circuit and the internal circulation heat dissipation circuit of the wind power converter, one end of the AC power supply is connected to the normally open contact input end of all contactors; the normally open contact output end of each contactor is connected to the input end of the corresponding heater, and the two ends of the AC power supply are connected to the output ends of all heaters; the output end of the temperature and pressure sensor is connected to the signal end of the wind power converter controller; the input ends of all contactor drive coils are connected to the I / O output end of the wind power converter controller; the output ends of all contactor drive coils are connected to the GND end of the wind power converter controller; a waterproof heat-conducting component layer is arranged on the outside of the N heaters, and the connecting lines of the heaters and the temperature and pressure sensors are wrapped in a waterproof casing.

2. The heating device for wind energy converter according to claim 1, characterized in that: N=3, the wind energy converter controller controls the corresponding contactor to close; the AC power supply supplies power to the corresponding heater through the normally open contact of the corresponding contactor.

3. The heating device for wind energy converter according to claim 1, characterized in that: The contactor is a component that is closed and disconnected according to a control signal; the contactor has at least two normally open contacts.

4. The heating device for wind energy converter according to claim 1, characterized in that: The temperature and pressure sensor collects the coolant temperature and pressure signals in the coolant pipeline in real time and transmits them to the wind energy converter controller.

5. The heating device for wind energy converter according to claim 1, characterized in that: After the wind energy converter controller controls the driving coil of the corresponding contactor to be energized, the normally open contact of the corresponding contactor is closed; and the corresponding heater is maintained to work continuously until the temperature of the coolant meets the operating conditions.

6. The heating device for wind energy converter according to claim 1, characterized in that: The heating device for the wind energy converter is installed inside the cabinet of the wind energy converter or independently installed outside the cabinet of the wind energy converter.

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