Energy efficiency control method and system for heat dissipation system of wind generating set and heat dissipation system

Abstract

The invention provides an energy efficiency control method and system for a heat dissipation system of a wind generating set and the heat dissipation system, and belongs to the technical field of wind power generation. The method comprises the following steps: acquiring the temperature of a to-be-heated part in the wind generating set and the temperature of a cooling liquid circulating valve of a cooling system; determining a heat source of the to-be-heated component according to the temperature of the to-be-heated component and the temperature of a cooling liquid circulating valve of the cooling system; and under the condition that it is determined that the heat source of the part needing to be heated is the heat dissipation system, a cooling liquid circulating valve of the heat dissipation system is controlled to be opened, so that cooling liquid in the heat dissipation system flows through the part needing to be heated through a cooling liquid circulating pipeline, and heat is supplied to the part needing to be heated. And under the condition that the heat source of the heat-needing component is determined to be the heat dissipation system, the cooling liquid circulating valve of the heat dissipation system is controlled to be opened, so that cooling liquid in the heat dissipation system flows through the heat-needing component through the cooling liquid circulating pipeline to supply heat to the heat-needing component, the self power consumption of the wind generating set is reduced, and the energy consumption is reduced. The power generation efficiency and the economic operation level of the wind generating set are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a method for controlling the energy efficiency of a heat dissipation system of a wind turbine generator set, an energy efficiency control system for the heat dissipation system of a wind turbine generator set, a heat dissipation system of a wind turbine generator set, and a machine-readable storage medium. Background Art

[0002] At present, China is actively leading the development of green and low-carbon energy around the world. As an important clean energy, wind power is developing rapidly. At present, an important issue that the wind power industry is concerned about is to reduce the cost of power generation and the self-consumption of the unit while ensuring the power generation efficiency. However, the current research and application in this regard lacks the management and control of the unit's own energy efficiency, does not pay attention to the conversion of the unit's energy efficiency, and cannot achieve refinement and intelligence.

[0003] An obvious problem is that the running unit will emit a lot of heat every day. The traditional way to deal with it is to dissipate this heat into the atmosphere outside the unit through the unit's air cooling or water cooling system. At the same time, many components in the unit need to be heated, and a heating function must be equipped to ensure that these components can operate normally when the temperature is low.

[0004] In addition to some components inside the cabin that need to be heated, components installed outside the cabin, such as wind measurement systems, lidar and other equipment, have more stringent requirements for heating functions and high requirements for heating power. The provision of this heat energy requires the unit's own electricity consumption, which increases the unit's energy consumption.

[0005] In this way, different parts of the unit have different treatments for heat. On the one hand, some equipment needs to release heat as much as possible to prevent overheating. On the other hand, some equipment needs to absorb heat to prevent low temperature.

[0006] The traditional approach is to dissipate heat and heat different components separately, which consumes electrical energy at the same time. From the perspective of energy efficiency management, this results in a large waste of electrical energy and also leads to a low overall energy efficiency level for the unit. Summary of the invention

[0007] The purpose of the embodiments of the present invention is to provide an energy efficiency control method, system and heat dissipation system of a wind turbine generator set. The method builds a coolant circulation pipeline between a heat-requiring component and a heat dissipation component, and is used to control the opening of the coolant circulation valve of the heat dissipation system when it is determined that the heat source of the heat-requiring component is the heat dissipation system based on the temperature of the heat-requiring component and the temperature at the coolant circulation valve of the heat dissipation system, so as to make the coolant in the heat dissipation system flow through the heat-requiring component through the coolant circulation pipeline to provide heat for the heat-requiring component, thereby realizing the heat circulation of the wind turbine generator set itself, reducing the use time of the heating device of the heat-requiring component, reducing the self-consumption of electricity of the wind turbine generator set, and improving the power generation efficiency and economic operation level of the wind turbine generator set.

[0008] In order to achieve the above object, the present invention provides a first aspect of a method for controlling the energy efficiency of a heat dissipation system of a wind turbine generator set, the method comprising:

[0009] Obtain the temperature of the heat-requiring components in the wind turbine generator set and the temperature of the coolant circulation valve of the heat dissipation system;

[0010] Determine the heat source of the heat-demanding component according to the temperature of the heat-demanding component and the temperature at the coolant circulation valve of the heat dissipation system;

[0011] When it is determined that the heat source of the heat-demanding component is the cooling system, the cooling system coolant circulation valve is controlled to open, so that the coolant in the cooling system flows through the heat-demanding component through the coolant circulation pipeline to provide heat for the heat-demanding component.

[0012] According to the above technical means, the method builds a coolant circulation pipeline between the heat-requiring component and the heat-dissipating component, and is used to control the opening of the coolant circulation valve of the heat-dissipating system when it is determined that the heat source of the heat-requiring component is the heat dissipating system based on the temperature of the heat-requiring component and the temperature at the coolant circulation valve of the heat dissipating system, so as to make the coolant in the heat dissipating system flow through the heat-requiring component through the coolant circulation pipeline to provide heat for the heat-requiring component, thereby realizing the heat circulation of the wind turbine itself, reducing the use time of the heating device of the heat-requiring component, reducing the self-consumption of electricity of the wind turbine, and improving the power generation efficiency and economic operation level of the wind turbine.

[0013] In some feasible embodiments, determining the heat source of the heat-demanding component according to the temperature of the heat-demanding component and the temperature at the coolant circulation valve of the heat dissipation system includes:

[0014] Compare the temperature of the heat-demanding components and the temperature of the coolant circulation valve in the cooling system;

[0015] If the temperature of the heat-demanding component is higher than the temperature at the coolant circulation valve of the cooling system, the heat source of the heat-demanding component is definitely the heat-demanding component heating device;

[0016] If the temperature of the heating component is lower than the temperature at the coolant circulation valve of the cooling system, the heat source of the heating component is definitely the cooling system.

[0017] According to the above technical means, it can be judged whether the coolant of the cooling system can provide heat to the heat-requiring components through heat exchange based on the temperature of the heat-requiring components and the temperature at the coolant circulation valve of the cooling system. If the cooling system cannot provide heat to the heat-requiring components, it is necessary to provide heat to the heat-requiring components through the heat-requiring component heating device. If the cooling system can provide heat to the heat-requiring components, the heat-requiring components are provided through the heating system.

[0018] In some possible embodiments, the method further comprises:

[0019] When it is determined that the heat source of the heat-requiring component is the heat-requiring component heating device, the heat-requiring component heating device is turned on to supply heat to the heat-requiring component, and the temperature of the heat-requiring component and the temperature at the coolant circulation valve of the cooling system are continuously detected. If the temperature at the coolant circulation valve of the cooling system is higher than the temperature of the heat-requiring component and the heat-requiring component still needs to be heated, the heat-requiring component heating device is turned off, and the coolant circulation valve of the cooling system is controlled to open, so as to switch the cooling system to supply heat to the heat-requiring component.

[0020] According to the above technical means, when the coolant temperature of the heat dissipation system rises to a level that can provide heat for the heat-requiring components, and the heat-requiring components still need to be heated, the heat dissipation system can be immediately switched to provide heat for the heat-requiring components, and the heat dissipation system is used preferentially to provide heat for the heat-requiring components. The heating device for the heat-requiring components and the heat dissipation system cooperate with each other to meet the heating needs of the heat-requiring components while reducing the self-consumption of electricity of the wind turbine generator set.

[0021] In some possible embodiments, the method further comprises:

[0022] After obtaining the temperature of the heat-demanding component and the temperature of the coolant circulation valve of the heat dissipation system, determine whether the current wind turbine generator set is in a grid-connected state;

[0023] When the current wind turbine generator set is in a grid-connected state, triggering the determination of the heat source of the heat-demanding component according to the temperature of the heat-demanding component and the temperature at the coolant circulation valve of the heat dissipation system;

[0024] When the current wind turbine generator set is in a non-grid-connected state, the heating device of the heat-requiring component is turned on to supply heat to the heat-requiring component until the current wind turbine generator set enters a grid-connected state.

[0025] According to the above technical means, when the wind turbine generator set is in the grid-connected state, the cooling system will be in the power supply state. At this time, it is necessary to judge the heat source of the heat-requiring components based on the temperature of the heat-requiring components and the temperature at the coolant circulation valve of the cooling system. If the wind turbine generator set is in the non-grid-connected state, the cooling system does not work, and it can be directly determined that the heat-requiring components are supplied with heat through the heat-requiring component heating device.

[0026] In some possible embodiments, the method further comprises:

[0027] When the heat-requiring component is heated by the cooling system, the temperature of the heat-requiring component and the temperature at the cooling system coolant circulation valve are continuously detected. If the temperature of the heat-requiring component is higher than the temperature at the cooling system coolant circulation valve, the cooling system coolant circulation valve is closed and the heating device of the heat-requiring component is turned on, so as to switch the heating device of the heat-requiring component to heat the heat-requiring component.

[0028] According to the above technical means, when the heat dissipation system cannot meet the heating demand of the heat-requiring component, the heating device of the heat-requiring component is switched to heat the heat-requiring component to meet the heating demand of the heat-requiring component and give priority to ensuring the normal operation of the heat-requiring component.

[0029] A second aspect of the present application provides an energy efficiency control system for a heat dissipation system of a wind turbine generator set, the system comprising:

[0030] Temperature collection device, used to collect the temperature of heat-requiring components in the wind turbine generator set and the temperature of the coolant circulation valve of the heat dissipation system;

[0031] The controller is used to determine the heat source of the heat-demanding component according to the temperature of the heat-demanding component and the temperature at the coolant circulation valve of the heat dissipation system; when it is determined that the heat source of the heat-demanding component is the heat dissipation system, the coolant circulation valve of the heat dissipation system is controlled to open, so that the coolant in the heat dissipation system flows through the heat-demanding component through the coolant circulation pipeline, thereby providing heat for the heat-demanding component.

[0032] According to the above technical means, the system builds a coolant circulation pipeline between the heat-demanding component and the heat-dissipating component, which is used to control the opening of the coolant circulation valve of the heat-dissipating system when it is determined that the heat source of the heat-demanding component is the heat dissipating system based on the temperature of the heat-demanding component and the temperature at the coolant circulation valve of the heat-dissipating system, so as to make the coolant in the heat-dissipating system flow through the heat-demanding component through the coolant circulation pipeline to provide heat for the heat-demanding component, thereby realizing the heat circulation of the wind turbine itself, reducing the use time of the heating device of the heat-demanding component, reducing the self-consumption of electricity of the wind turbine, and improving the power generation efficiency and economic operation level of the wind turbine.

[0033] In some feasible embodiments, the controller is further configured to:

[0034] Compare the temperature of the heat-demanding components and the temperature of the coolant circulation valve in the cooling system;

[0035] If the temperature of the heat-demanding component is higher than the temperature at the coolant circulation valve of the cooling system, the heat source of the heat-demanding component is definitely the heat-demanding component heating device;

[0036] If the temperature of the heating component is lower than the temperature at the coolant circulation valve of the cooling system, the heat source of the heating component is definitely the cooling system.

[0037] According to the above technical means, it can be judged whether the coolant of the cooling system can provide heat to the heat-requiring components through heat exchange based on the temperature of the heat-requiring components and the temperature at the coolant circulation valve of the cooling system. If the cooling system cannot provide heat to the heat-requiring components, it is necessary to provide heat to the heat-requiring components through the heat-requiring component heating device. If the cooling system can provide heat to the heat-requiring components, the heat-requiring components are provided through the heating system.

[0038] In some feasible embodiments, the controller is further configured to:

[0039] When it is determined that the heat source of the heat-requiring component is the heat-requiring component heating device, the heat-requiring component heating device is turned on to supply heat to the heat-requiring component, and the temperature of the heat-requiring component and the temperature at the coolant circulation valve of the cooling system are continuously detected. If the temperature at the coolant circulation valve of the cooling system is higher than the temperature of the heat-requiring component and the heat-requiring component still needs to be heated, the heat-requiring component heating device is turned off, and the coolant circulation valve of the cooling system is controlled to open, so as to switch the cooling system to supply heat to the heat-requiring component.

[0040] The third aspect of the present application provides a wind turbine heat dissipation system, which is applied to the energy efficiency control system of the wind turbine heat dissipation system, comprising a coolant storage device, a heat exchange device, a coolant outlet pipe and a coolant return pipe, wherein the outlet of the coolant storage device is connected to the inlet of the heat exchange device through the coolant outlet pipe, and the outlet of the heat exchange device is connected to the return port of the coolant storage device through the coolant return pipe; the wind turbine heat dissipation system also includes: a coolant circulation pipe, a coolant circulation valve arranged at the inlet of the coolant circulation pipe, and an outlet valve arranged at the outlet of the coolant circulation pipe;

[0041] The liquid inlet of the coolant circulation pipeline is connected to the liquid outlet of the heat exchange transducer, and is used to guide the coolant that has been heated by heat exchange with the heat dissipation component to the heat-requiring component to provide heat for the heat-requiring component when the coolant circulation valve is opened.

[0042] According to the above technical means, adding a coolant circulation pipeline to the existing heat dissipation system of the wind turbine generator set can transport the coolant that has been heated by heat exchange with the heat dissipation components in the heat dissipation system to the heat-requiring components, heat the heat-requiring components, and self-circulate the heat, thereby reducing the self-consumption of electricity of the wind turbine generator set.

[0043] A fourth aspect of the present application provides a machine-readable storage medium having instructions stored thereon, the instructions being used to enable a machine to execute the energy efficiency control method for a heat dissipation system of a wind turbine generator set.

[0044] Through the above technical solution, the internal coolant circulation system of the wind turbine is constructed to provide the heat dissipated by the heat dissipating components to the heat-requiring components through the coolant circulation, thereby realizing the integrated and refined management and intelligent regulation of the coolant circulation energy efficiency system, thereby reducing the self-consumption of electricity of the wind turbine and improving the power generation efficiency and economic operation level of the unit.

[0045] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

[0047] Figure 1 It is a flow chart of a method for controlling energy efficiency of a heat dissipation system of a wind turbine generator set provided by an embodiment of the present invention;

[0048] Figure 2 It is a schematic diagram of the control process of the energy efficiency control method of the heat dissipation system of a wind turbine generator set provided by an embodiment of the present invention;

[0049] Figure 3 It is a block diagram of an energy efficiency control system of a wind turbine generator set heat dissipation system provided by an embodiment of the present invention;

[0050] Figure 4 The present invention is a control system block diagram of a wind turbine generator set heat dissipation system provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0051] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0052] At present, the cooling system of wind turbines cannot manage the energy efficiency of heating components and cooling components according to different operating conditions of the units and realize intelligent adjustment, which is mainly reflected in the following aspects:

[0053] The heat dissipation system of the heat-generating equipment and the heating system of the heat-requiring components in the unit are completely independent. The heat dissipation function and the heating function each realize their own functions, and are not centralized to regulate the circulation and distribution of energy.

[0054] At present, the heating functions of various components of the unit are independently controlled on a component-by-component basis, and there is no heating system provided uniformly by the unit.

[0055] Due to the complex operating environment of wind turbines, the operation of the cooling system and heating system is affected by operating conditions and there are time differences. There is currently no unified coordination and deployment.

[0056] The above factors lead to low energy efficiency of the fan's cooling system, and the heat of the cooling part is lost but cannot be reused. The heat-requiring parts need to be powered separately to provide heat, which increases the energy consumption of the unit.

[0057] Therefore, the current thermal energy conversion system of wind turbines cannot meet the requirements of reducing self-consumption of electricity and achieving high energy efficiency.

[0058] Figure 1 FIG. 1 is a flow chart of a method for controlling the energy efficiency of a wind turbine generator system heat dissipation system according to an embodiment of the present invention. Figure 1 As shown, the method includes:

[0059] S1: Get the temperature of the heat-requiring components in the wind turbine generator set and the temperature of the coolant circulation valve of the cooling system. The heat-requiring components are components that need to be heated, and the cooling system is a system in the wind turbine generator set that dissipates heat for the components that need to be cooled, generally a water cooling system. Most of the heat-requiring components are high-power components, such as generators, gearboxes, and converters, while most of the heat-requiring components are low-power components, such as anemometers, laser radars, and control cabinets. There is often a deviation in the working time of the former heating and the latter cooling.

[0060] In some feasible embodiments, the temperature of the heat-demanding component and the temperature at the coolant circulation valve of the heat dissipation system are collected by a temperature collection device and then transmitted to the controller.

[0061] S2: Determine the heat source of the heat-demanding component according to the temperature of the heat-demanding component and the temperature at the coolant circulation valve of the heat dissipation system.

[0062] In some feasible embodiments, in order to heat the heat-requiring component, a heating device is provided, and the heating device is completely independent of the heat dissipation system. The heat source of the heat-requiring component is determined according to the temperature of the heat-requiring component and the temperature at the coolant circulation valve of the heat dissipation system, including:

[0063] Compare the temperature of the heat-demanding components and the temperature of the coolant circulation valve in the cooling system;

[0064] If the temperature of the heat-demanding component is higher than the temperature at the coolant circulation valve of the cooling system, the heat source of the heat-demanding component is definitely the heat-demanding component heating device;

[0065] If the temperature of the heat-demanding component is lower than the temperature at the cooling system coolant circulation valve, then the heat source of the heat-demanding component is the cooling system. Therefore, it can be judged whether the cooling system coolant can provide heat to the heat-demanding component through heat exchange according to the temperature of the heat-demanding component and the temperature at the cooling system coolant circulation valve. If the cooling system cannot provide heat to the heat-demanding component, it is necessary to provide heat to the heat-demanding component through the heating device of the heat-demanding component. If the cooling system can provide heat to the heat-demanding component, it is necessary to provide heat to the heat-demanding component through the heating system.

[0066] S3: When it is determined that the heat source of the heat-demanding component is the heat dissipation system, the cooling liquid circulation valve of the heat dissipation system is controlled to be opened, so that the cooling liquid in the heat dissipation system flows through the heat-demanding component through the cooling liquid circulation pipeline to provide heat for the heat-demanding component. After the cooling liquid in the heat dissipation system flows through the heat dissipation component, it exchanges heat with the heat dissipation component, so that the temperature of the heat dissipation component is reduced and the temperature of the cooling liquid is increased. After the cooling liquid circulation valve of the heat dissipation system is opened, the cooling liquid with the increased temperature flows through the heat-demanding component through the cooling liquid circulation pipeline, exchanges heat with the heat-demanding component, so that the temperature of the heat-demanding component is increased and the temperature of the cooling liquid is reduced. Therefore, the method builds a cooling liquid circulation pipeline between the heat-demanding component and the heat dissipation component, and is used to control the cooling liquid circulation valve of the heat dissipation system to be opened when it is determined that the heat source of the heat-demanding component is the heat dissipation system according to the temperature of the heat-demanding component and the temperature at the cooling liquid circulation valve of the heat dissipation system, so that the cooling liquid in the heat dissipation system flows through the heat-demanding component through the cooling liquid circulation pipeline to provide heat for the heat-demanding component, thereby realizing the heat circulation of the wind turbine itself, reducing the use time of the heating device of the heat-demanding component, reducing the self-consumption of electricity of the wind turbine, and improving the power generation efficiency and economic operation level of the wind turbine.

[0067] Generally, when a wind turbine generator set is just connected to the grid, the heat dissipation component has just started to operate, and the heat generated by it has no obvious effect on the temperature increase of the coolant. At this time, the temperature of the heat-requiring component is equivalent to the ambient temperature, and the temperature at the coolant circulation valve of the heat dissipation system may be lower than the temperature of the heat-requiring component. In this case, the method further includes:

[0068] When it is determined that the heat source of the heat-requiring component is the heat-requiring component heating device, the heat-requiring component heating device is turned on to supply heat to the heat-requiring component, and the temperature of the heat-requiring component and the temperature at the cooling system coolant circulation valve are continuously detected. If the temperature at the cooling system coolant circulation valve is higher than the temperature of the heat-requiring component, and the heat-requiring component still needs to be heated, the heat-requiring component heating device is turned off, and the cooling system coolant circulation valve is controlled to open, so as to switch the cooling system to supply heat to the heat-requiring component. In this way, when the cooling system coolant temperature rises to a level that can supply heat to the heat-requiring component, and the heat-requiring component still needs to be heated, the cooling system can be immediately switched to supply heat to the heat-requiring component, and the cooling system is used preferentially to supply heat to the heat-requiring component. The heat-requiring component heating device and the cooling system cooperate with each other to meet the heating needs of the heat-requiring component while reducing the self-consumption of the wind turbine generator set.

[0069] In some possible embodiments, the method further comprises:

[0070] After obtaining the temperature of the heat-demanding component and the temperature of the coolant circulation valve of the heat dissipation system, determine whether the current wind turbine generator set is in a grid-connected state;

[0071] When the current wind turbine generator set is in a grid-connected state, triggering the determination of the heat source of the heat-demanding component according to the temperature of the heat-demanding component and the temperature at the coolant circulation valve of the heat dissipation system;

[0072] When the current wind turbine generator set is in a non-grid-connected state, the heating device of the heat-requiring component is turned on to supply heat to the heat-requiring component until the current wind turbine generator set enters a grid-connected state.

[0073] According to the above technical means, when the wind turbine generator set is in the grid-connected state, the cooling system will be in the power supply state. At this time, it is necessary to judge the heat source of the heat-requiring components based on the temperature of the heat-requiring components and the temperature at the coolant circulation valve of the cooling system. If the wind turbine generator set is in the non-grid-connected state, the cooling system does not work, and it can be directly determined that the heat-requiring components are supplied with heat through the heat-requiring component heating device.

[0074] In some possible embodiments, the method further comprises:

[0075] Determine whether the heat of the heat-demanding component is sufficient according to its temperature. If the heat of the heat-demanding component is sufficient, turn off the heating device or the cooling system coolant circulation valve. Control the cooling system coolant circulation valve and heating device according to the heat demand of the heat-demanding component to avoid excessive temperature of the heat-demanding component that affects its service life and reduce unnecessary energy consumption.

[0076] In some possible embodiments, the method further comprises:

[0077] When the heat-requiring component is heated by the cooling system, the temperature of the heat-requiring component and the temperature at the cooling system coolant circulation valve are continuously detected. If the temperature of the heat-requiring component is higher than the temperature at the cooling system coolant circulation valve, the cooling system coolant circulation valve is closed and the heating device of the heat-requiring component is turned on, so as to switch the heating device of the heat-requiring component to heat the heat-requiring component.

[0078] Since the heat dissipation power of the heat dissipation components is large, the temperature of the coolant in the cooling system is relatively high during operation, while the heat-requiring components are mainly sensor components, and their temperatures are very low when they need to be heated. Therefore, in fact, there is almost no situation where the temperature of the heat-requiring components is higher than the temperature of the coolant in the cooling system when they need to be heated.

[0079] According to the above technical means, when the heat dissipation system cannot meet the heating demand of the heat-requiring component, the heating device of the heat-requiring component is switched to heat the heat-requiring component to meet the heating demand of the heat-requiring component and give priority to ensuring the normal operation of the heat-requiring component.

[0080] The following takes a water cooling system as an example to illustrate the energy efficiency control method of the wind turbine heat dissipation system of the present application in combination with a specific control process.

[0081] like Figure 2 As shown, when the method of the present application is executed, it is first determined whether the wind turbine generator set is in a grid-connected operation state or a non-grid-connected operation state. If the wind turbine generator set is in a non-grid-connected operation state, it is determined whether the heat-requiring component needs to be heated. If heating is required, the heat-requiring component is heated by a heat-requiring component heating device. When the wind turbine generator set is in a grid-connected operation state, it is further determined whether the heat dissipation system is in operation, that is, whether the water cooling system is in operation. If the water cooling system is not in operation, it is determined whether the heat-requiring component needs to be heated. If heating is required, the heat-requiring component is heated by a heat-requiring component heating device. If the water cooling system is in operation, It is then further determined whether the heat-requiring component needs to be heated. If the heat-requiring component does not need to be heated, the process returns to continue determining whether the wind turbine generator set is in a grid-connected operating state or a non-grid-connected operating state. If the heat-requiring component needs to be heated, it is determined whether the temperature of the heat-requiring component is lower than the temperature at the coolant circulation valve of the heat dissipation system, that is, it is determined whether the temperature of the heat-requiring component is lower than the temperature of the water cooling system. If the temperature of the heat-requiring component is higher than the temperature of the water cooling system, the heat-requiring component is directly heated by the heat-requiring component heating device; if the temperature of the heat-requiring component is lower than the temperature of the water cooling system, the coolant circulation valve of the heat dissipation system is opened to start heating the water cooling system. During the heating process of the water cooling system, the temperature of the heat-requiring component is continuously detected to see if it meets the demand. If it meets the demand, the system returns to determine whether the wind turbine generator set is in a grid-connected operation state or a non-grid-connected operation state. If it does not meet the demand, the temperature of the heat-requiring component is continuously detected to see if it is lower than the temperature of the water cooling system. If the temperature of the heat-requiring component is higher than the temperature of the water cooling system, the coolant circulation valve of the heat dissipation system is closed, and the heat-requiring component is heated by the heat-requiring component heating device. The above steps are repeated until the heating is completed, and the heat-requiring component heating device or the coolant circulation valve of the heat dissipation system that is currently heating the heat-requiring component is closed.

[0082] The second aspect of the present application provides an energy efficiency control system for a heat dissipation system of a wind turbine generator set, such as Figure 3 As shown, the system comprises:

[0083] Temperature collection device, used to collect the temperature of heat-requiring components in the wind turbine generator set and the temperature of the coolant circulation valve of the heat dissipation system;

[0084] The controller is used to determine the heat source of the heat-demanding component according to the temperature of the heat-demanding component and the temperature at the coolant circulation valve of the heat dissipation system; when it is determined that the heat source of the heat-demanding component is the heat dissipation system, the coolant circulation valve of the heat dissipation system is controlled to open, so that the coolant in the heat dissipation system flows through the heat-demanding component through the coolant circulation pipeline, thereby providing heat for the heat-demanding component.

[0085] According to the above technical means, the system builds a coolant circulation pipeline between the heat-demanding component and the heat-dissipating component, which is used to control the opening of the coolant circulation valve of the heat-dissipating system when it is determined that the heat source of the heat-demanding component is the heat dissipating system based on the temperature of the heat-demanding component and the temperature at the coolant circulation valve of the heat-dissipating system, so as to make the coolant in the heat-dissipating system flow through the heat-demanding component through the coolant circulation pipeline to provide heat for the heat-demanding component, thereby realizing the heat circulation of the wind turbine itself, reducing the use time of the heating device of the heat-demanding component, reducing the self-consumption of electricity of the wind turbine, and improving the power generation efficiency and economic operation level of the wind turbine.

[0086] In some feasible embodiments, the controller is further configured to:

[0087] Compare the temperature of the heat-demanding components and the temperature of the coolant circulation valve in the cooling system;

[0088] If the temperature of the heat-demanding component is higher than the temperature at the coolant circulation valve of the cooling system, the heat source of the heat-demanding component is definitely the heat-demanding component heating device;

[0089] If the temperature of the heating component is lower than the temperature at the coolant circulation valve of the cooling system, the heat source of the heating component is definitely the cooling system.

[0090] According to the above technical means, it can be judged whether the coolant of the cooling system can provide heat to the heat-requiring components through heat exchange based on the temperature of the heat-requiring components and the temperature at the coolant circulation valve of the cooling system. If the cooling system cannot provide heat to the heat-requiring components, it is necessary to provide heat to the heat-requiring components through the heat-requiring component heating device. If the cooling system can provide heat to the heat-requiring components, the heat-requiring components are provided through the heating system.

[0091] In some feasible embodiments, the controller is further configured to:

[0092] When it is determined that the heat source of the heat-requiring component is the heat-requiring component heating device, the heat-requiring component heating device is turned on to supply heat to the heat-requiring component, and the temperature of the heat-requiring component and the temperature at the coolant circulation valve of the cooling system are continuously detected. If the temperature at the coolant circulation valve of the cooling system is higher than the temperature of the heat-requiring component and the heat-requiring component still needs to be heated, the heat-requiring component heating device is turned off, and the coolant circulation valve of the cooling system is controlled to open, so as to switch the cooling system to supply heat to the heat-requiring component.

[0093] The third aspect of the present application provides a wind turbine heat dissipation system, which is applied to the energy efficiency control system of the wind turbine heat dissipation system, comprising a coolant storage device, a heat exchange device, a coolant outlet pipe and a coolant return pipe, wherein the outlet of the coolant storage device is connected to the inlet of the heat exchange device through the coolant outlet pipe, and the outlet of the heat exchange device is connected to the return port of the coolant storage device through the coolant return pipe; the wind turbine heat dissipation system also includes: a coolant circulation pipe, a coolant circulation valve arranged at the inlet of the coolant circulation pipe, and an outlet valve arranged at the outlet of the coolant circulation pipe;

[0094] The liquid inlet of the coolant circulation pipeline is connected to the liquid outlet of the heat exchange transducer, and is used to guide the coolant that has been heated by heat exchange with the heat dissipation component to the heat-requiring component to provide heat for the heat-requiring component when the coolant circulation valve is opened.

[0095] According to the above technical means, adding a coolant circulation pipeline to the existing heat dissipation system of the wind turbine generator set can transport the coolant that has been heated by heat exchange with the heat dissipation components in the heat dissipation system to the heat-requiring components, heat the heat-requiring components, and self-circulate the heat, thereby reducing the self-consumption of electricity of the wind turbine generator set.

[0096] In some feasible embodiments, the wind turbine generator set heat dissipation system energy efficiency control system may be an independent control system, and the independent control system exchanges data and unit status with the wind turbine generator set main control system through communication. Figure 4 As shown, the temperature acquisition device collects the temperature at the coolant circulation valve of the heat dissipation system and the temperature of the heat-requiring components. The heat generated by the heat dissipation components such as the generator, converter, gearbox, etc. is taken away by the heat dissipation system. The controller controls the coolant circulation valve to open, so that the heat dissipation system and the heat-requiring system are connected through the coolant circulation pipeline. The coolant with a higher temperature in the heat dissipation system flows to the heat-requiring system to provide heat for the heat-requiring components. The heat-requiring components can be anemometers, lidars and other components.

[0097] In some feasible embodiments, the energy efficiency control system of the wind turbine generator set heat dissipation system may also be integrated into the main control system.

[0098] A fourth aspect of the present application provides a machine-readable storage medium having instructions stored thereon, the instructions being used to enable a machine to execute the energy efficiency control method for a heat dissipation system of a wind turbine generator set.

[0099] Those skilled in the art will understand that all or part of the steps in the method for implementing the above-mentioned embodiments can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including several instructions for making a single-chip microcomputer, a chip or a processor (processor) perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0100] The optional embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above embodiments. Within the technical concept of the embodiments of the present invention, the technical scheme of the embodiments of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the embodiments of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0101] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims

1. A method for controlling the energy efficiency of a heat dissipation system of a wind turbine generator set, characterized in that: The method comprises: Obtain the temperature of the heat-requiring components in the wind turbine generator set and the temperature of the coolant circulation valve of the heat dissipation system; Determine the heat source of the heat-demanding component according to the temperature of the heat-demanding component and the temperature at the coolant circulation valve of the heat dissipation system; When it is determined that the heat source of the heat-demanding component is the cooling system, the cooling system coolant circulation valve is controlled to open, so that the coolant in the cooling system flows through the heat-demanding component through the coolant circulation pipeline to provide heat for the heat-demanding component.

2. The method for controlling the energy efficiency of a heat dissipation system of a wind turbine generator set according to claim 1, characterized in that: Determining the heat source of the heat-demanding component according to the temperature of the heat-demanding component and the temperature at the coolant circulation valve of the heat dissipation system includes: Compare the temperature of the heat-demanding components and the temperature of the coolant circulation valve in the cooling system; If the temperature of the heat-demanding component is higher than the temperature at the coolant circulation valve of the cooling system, the heat source of the heat-demanding component is definitely the heat-demanding component heating device; If the temperature of the heating component is lower than the temperature at the coolant circulation valve of the cooling system, the heat source of the heating component is definitely the cooling system.

3. The method for controlling the energy efficiency of a heat dissipation system of a wind turbine generator set according to claim 2, characterized in that: The method further comprises: When it is determined that the heat source of the heat-requiring component is the heat-requiring component heating device, the heat-requiring component heating device is turned on to supply heat to the heat-requiring component, and the temperature of the heat-requiring component and the temperature at the coolant circulation valve of the cooling system are continuously detected. If the temperature at the coolant circulation valve of the cooling system is higher than the temperature of the heat-requiring component and the heat-requiring component still needs to be heated, the heat-requiring component heating device is turned off, and the coolant circulation valve of the cooling system is controlled to open, so as to switch the cooling system to supply heat to the heat-requiring component.

4. The method for controlling the energy efficiency of a heat dissipation system of a wind turbine generator set according to claim 1, characterized in that: The method further comprises: After obtaining the temperature of the heat-demanding component and the temperature of the coolant circulation valve of the heat dissipation system, determine whether the current wind turbine generator set is in a grid-connected state; When the current wind turbine generator set is in a grid-connected state, triggering the determination of the heat source of the heat-demanding component according to the temperature of the heat-demanding component and the temperature at the coolant circulation valve of the heat dissipation system; When the current wind turbine generator set is in a non-grid-connected state, the heating device of the heat-requiring component is turned on to supply heat to the heat-requiring component until the current wind turbine generator set enters a grid-connected state.

5. The method for controlling the energy efficiency of a heat dissipation system of a wind turbine generator set according to claim 1, characterized in that: The method further comprises: When the heat-requiring component is heated by the cooling system, the temperature of the heat-requiring component and the temperature at the cooling system coolant circulation valve are continuously detected. If the temperature of the heat-requiring component is higher than the temperature at the cooling system coolant circulation valve, the cooling system coolant circulation valve is closed and the heating device of the heat-requiring component is turned on, so as to switch the heating device of the heat-requiring component to heat the heat-requiring component.

6. An energy efficiency control system for a wind turbine generator system heat dissipation system, characterized in that: The system comprises: Temperature collection device, used to collect the temperature of heat-requiring components in the wind turbine generator set and the temperature of the coolant circulation valve of the heat dissipation system; The controller is used to determine the heat source of the heat-demanding component according to the temperature of the heat-demanding component and the temperature at the coolant circulation valve of the heat dissipation system; when it is determined that the heat source of the heat-demanding component is the heat dissipation system, the coolant circulation valve of the heat dissipation system is controlled to open, so that the coolant in the heat dissipation system flows through the heat-demanding component through the coolant circulation pipeline, thereby providing heat for the heat-demanding component.

7. The wind turbine generator system heat dissipation system energy efficiency control system according to claim 6, characterized in that: The controller is also used for: Compare the temperature of the heat-demanding components and the temperature of the coolant circulation valve in the cooling system; If the temperature of the heat-demanding component is higher than the temperature at the coolant circulation valve of the cooling system, the heat source of the heat-demanding component is definitely the heat-demanding component heating device; If the temperature of the heating component is lower than the temperature at the coolant circulation valve of the cooling system, the heat source of the heating component is definitely the cooling system.

8. The wind turbine generator system heat dissipation system energy efficiency control system according to claim 7, characterized in that: The controller is also used for: When it is determined that the heat source of the heat-requiring component is the heat-requiring component heating device, the heat-requiring component heating device is turned on to supply heat to the heat-requiring component, and the temperature of the heat-requiring component and the temperature at the coolant circulation valve of the cooling system are continuously detected. If the temperature at the coolant circulation valve of the cooling system is higher than the temperature of the heat-requiring component and the heat-requiring component still needs to be heated, the heat-requiring component heating device is turned off, and the coolant circulation valve of the cooling system is controlled to open, so as to switch the cooling system to supply heat to the heat-requiring component.

9. A wind turbine heat dissipation system, applied to the wind turbine heat dissipation system energy efficiency control system according to any one of claims 6 to 8, comprising a coolant storage device, a heat exchange device, a coolant outlet pipe and a coolant return pipe, the outlet of the coolant storage device is connected to the inlet of the heat exchange device through the coolant outlet pipe, and the outlet of the heat exchange device is connected to the return port of the coolant storage device through the coolant return pipe; characterized in that The wind turbine generator heat dissipation system further comprises: a coolant circulation pipeline, a coolant circulation valve arranged at a liquid inlet of the coolant circulation pipeline, and a liquid outlet valve arranged at a liquid outlet of the coolant circulation pipeline; The liquid inlet of the coolant circulation pipeline is connected to the liquid outlet of the heat exchange transducer, and is used to guide the coolant that has been heated by heat exchange with the heat dissipation component to the heat-requiring component to provide heat for the heat-requiring component when the coolant circulation valve is opened.

10. A machine-readable storage medium having instructions stored thereon, the instructions being used to enable a machine to execute the method for controlling energy efficiency of a heat dissipation system of a wind turbine generator set according to any one of claims 1 to 5 of the present application.

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