Wind turbine generator system heat dissipation system energy efficiency control method and system and heat dissipation system

Abstract

The application provides a wind turbine generator system heat dissipation system energy efficiency control method and system and a heat dissipation system, and belongs to the technical field of wind power generation. The method comprises the following steps: obtaining the temperature of a heat requiring component in a wind turbine generator system and the temperature of a cooling liquid circulating valve of a heat dissipation system; determining the heat source of the heat requiring component according to the temperature of the heat requiring component and the temperature of the cooling liquid circulating valve of the heat dissipation system; in the case that the heat source of the heat requiring component is the heat dissipation system, controlling the cooling liquid circulating valve of the heat dissipation system to be opened, so that the cooling liquid in the heat dissipation system flows through the heat requiring component through a cooling liquid circulating pipeline, and heat is supplied to the heat requiring component. In the case that the heat source of the heat requiring component is the heat dissipation system, the cooling liquid circulating 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 requiring component through the cooling liquid circulating pipeline, heat is supplied to the heat requiring component, the self-consumption power of the wind turbine generator system is reduced, and the power generation efficiency and the economic operation level of the wind turbine generator system are improved.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, specifically to a method for energy efficiency control of a wind turbine generator cooling system, a control system for energy efficiency of a wind turbine generator cooling system, a wind turbine generator cooling system, and a machine-readable storage medium. Background Technology

[0002] Currently, China is actively leading the development of green and low-carbon energy globally, and wind power, as an important clean energy source, is developing rapidly. A key concern for the wind power industry is reducing generation costs and the self-consumption of wind turbines while ensuring power generation efficiency. However, current research and applications in this area lack management and control over the energy efficiency of the turbines themselves, do not emphasize energy efficiency conversion, and are far from achieving refined and intelligent management.

[0003] One obvious problem is that operating generator units generate a large amount of heat every day. The traditional approach 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 inside the unit require heating and must be equipped with heating functions to ensure that these components can operate normally when the temperature is low.

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

[0005] Thus, different components of the unit have different ways of handling heat. On the one hand, some equipment needs to release heat as much as possible to prevent overheating, while on the other hand, some equipment needs to absorb heat to prevent low temperatures.

[0006] The traditional approach involves heat dissipation and heating of different components separately, which consumes electrical energy simultaneously. From an energy efficiency management perspective, this results in a significant waste of electrical energy and leads to a low overall energy efficiency level for the unit. Summary of the Invention

[0007] The embodiment of the application aims to provide a wind turbine heat dissipation system energy efficiency control method, system and heat dissipation system, which builds a cooling liquid circulation pipeline between a heat requiring component and a heat dissipation component, and controls the opening of a cooling liquid circulation valve of the heat dissipation system to make the cooling liquid in the heat dissipation system flow through the heat requiring component through the cooling liquid circulation pipeline to heat the heat requiring component when the heat source of the heat requiring component is determined to be the heat dissipation system according to the temperature of the heat requiring component and the temperature at the cooling liquid circulation valve of the heat dissipation system, so as to realize the heat circulation of the wind turbine itself, reduce the use time of the heating device of the heat requiring component, reduce the self-consumption power of the wind turbine, and improve the power generation efficiency and economic operation level of the wind turbine.

[0008] In order to achieve the above-mentioned purpose, the first aspect of the application provides a wind turbine heat dissipation system energy efficiency control method, which comprises the following steps:

[0009] obtaining the temperature of a heat requiring component in a wind turbine and the temperature at a cooling liquid circulation valve of a heat dissipation system;

[0010] determining the heat source of the heat requiring component according to the temperature of the heat requiring component and the temperature at the cooling liquid circulation valve of the heat dissipation system;

[0011] controlling the opening of the cooling liquid circulation valve of the heat dissipation system to make the cooling liquid in the heat dissipation system flow through the heat requiring component through a cooling liquid circulation pipeline to heat the heat requiring component when the heat source of the heat requiring component is determined to be the heat dissipation system.

[0012] According to the above technical means, the cooling liquid circulation pipeline is built between the heat requiring component and the heat dissipation component, and the cooling liquid circulation valve of the heat dissipation system is controlled to be opened to make the cooling liquid in the heat dissipation system flow through the heat requiring component through the cooling liquid circulation pipeline to heat the heat requiring component when the heat source of the heat requiring component is determined to be the heat dissipation system according to the temperature of the heat requiring component and the temperature at the cooling liquid circulation valve of the heat dissipation system, so as to realize the heat circulation of the wind turbine itself, reduce the use time of the heating device of the heat requiring component, reduce the self-consumption power of the wind turbine, and improve the power generation efficiency and economic operation level of the wind turbine.

[0013] In some feasible embodiments, the determination of the heat source of the heat requiring component according to the temperature of the heat requiring component and the temperature at the cooling liquid circulation valve of the heat dissipation system comprises the following steps:

[0014] comparing the temperature of the heat requiring component and the temperature at the cooling liquid circulation valve of the heat dissipation system;

[0015] if the temperature of the heat requiring component is higher than the temperature at the cooling liquid circulation valve of the heat dissipation system, determining that the heat source of the heat requiring component is the heating device of the heat requiring component;

[0016] If the temperature of the heat requiring component is lower than the temperature of the cooling liquid circulating valve of the heat dissipation system, it is determined that the heat source of the heat requiring component is the heat dissipation system.

[0017] According to the above technical means, it can be determined whether the cooling liquid of the heat dissipation system can supply heat to the heat requiring component through heat exchange according to the temperature of the heat requiring component and the temperature of the cooling liquid circulating valve of the heat dissipation system. If the heat dissipation system cannot supply heat to the heat requiring component, the heat requiring component heating device is needed to supply heat to the heat requiring component. If the heat dissipation system can supply heat to the heat requiring component, the heat requiring component is supplied with heat by the heat dissipation system.

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

[0019] In the case of determining that the heat source of the heat requiring component is the heat requiring component heating device, the heat requiring component heating device is started to supply heat to the heat requiring component. The temperature of the heat requiring component and the temperature of the cooling liquid circulating valve of the heat dissipation system are continuously detected. If the temperature of the cooling liquid circulating valve of the heat dissipation 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 stopped, and the cooling liquid circulating valve of the heat dissipation system is controlled to be opened to switch the heat dissipation system to supply heat to the heat requiring component.

[0020] According to the above technical means, the heat dissipation system can be switched to supply heat to the heat requiring component immediately in the case that the temperature of the cooling liquid of the heat dissipation system is increased to be able to supply heat to the heat requiring component and the heat requiring component still needs to be heated. The heat requiring component is preferentially supplied with heat by the heat dissipation system. The heat requiring component heating device and the heat dissipation system cooperate with each other to meet the heating demand of the heat requiring component while reducing the self-consumption power of the wind turbine generator.

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

[0022] After the temperature of the heat requiring component and the temperature of the cooling liquid circulating valve of the heat dissipation system are acquired, it is determined whether the current wind turbine generator is in a grid-connected state.

[0023] When the current wind turbine generator is in the grid-connected state, the heat source of the heat requiring component is determined according to the temperature of the heat requiring component and the temperature of the cooling liquid circulating valve of the heat dissipation system.

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

[0025] According to the above technical means, when the wind turbine generator is in the grid-connected state, the heat dissipation system is in a power supply state. At this time, the heat source of the heat requiring component needs to be determined according to the temperature of the heat requiring component and the temperature of the cooling liquid circulating valve of the heat dissipation system. When the wind turbine generator is in the non-grid-connected state, the heat dissipation system does not work, and the heat requiring component can be directly supplied with heat by the heat requiring component heating device.

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

[0027] In the process of supplying heat to the heat requiring component by the heat dissipation system, the temperature of the heat requiring component and the temperature at the cooling liquid circulation valve of the heat dissipation system are continuously detected. If the temperature of the heat requiring component is higher than the temperature at the cooling liquid circulation valve of the heat dissipation system, the cooling liquid circulation valve of the heat dissipation system is closed and the heat requiring component heating device is opened to switch the heat requiring component heating device to supply heat to 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 heat requiring component heating device is switched to heat the heat requiring component to meet the heating demand of the heat requiring component, thereby preferentially ensuring the normal work of the heat requiring component.

[0029] The second aspect of the present application provides a wind turbine heat dissipation system energy efficiency control system, the system comprising:

[0030] a temperature acquisition device configured to acquire the temperature of the heat requiring component and the temperature at the cooling liquid circulation valve of the heat dissipation system;

[0031] a controller configured to determine the heat source of the heat requiring component according to the temperature of the heat requiring component and the temperature at the cooling liquid circulation valve of the heat dissipation system, and control the cooling liquid circulation valve of the heat dissipation system to be opened to make the cooling liquid in the heat dissipation system flow through the heat requiring component through the cooling liquid circulation pipeline to supply heat to the heat requiring component when it is determined that the heat source of the heat requiring component is the heat dissipation system.

[0032] According to the above technical means, the cooling liquid circulation pipeline is built between the heat requiring component and the heat dissipation component, which is configured to control the cooling liquid circulation valve of the heat dissipation system to be opened to make the cooling liquid in the heat dissipation system flow through the heat requiring component through the cooling liquid circulation pipeline to supply heat to the heat requiring component when it is determined that the heat source of the heat requiring component is the heat dissipation system, thereby realizing the heat circulation of the wind turbine itself, reducing the use time of the heat requiring component heating device, reducing the self-consumption power of the wind turbine, and improving the power generation efficiency and economic operation level of the wind turbine.

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

[0034] compare the temperature of the heat requiring component and the temperature at the cooling liquid circulation valve of the heat dissipation system;

[0035] if the temperature of the heat requiring component is higher than the temperature at the cooling liquid circulation valve of the heat dissipation system, it is determined that the heat source of the heat requiring component is the heat requiring component heating device;

[0036] if the temperature of the heat requiring component is lower than the temperature at the cooling liquid circulation valve of the heat dissipation system, it is determined that the heat source of the heat requiring component is the heat dissipation system.

[0037] According to the above technical means, whether the cooling liquid of the heat dissipation system can supply heat to the heat requiring component through heat exchange can be determined according to the temperature of the heat requiring component and the temperature at the cooling liquid circulating valve of the heat dissipation system. If the heat dissipation system cannot supply heat to the heat requiring component, the heat requiring component heating device is needed to supply heat to the heat requiring component. If the heat dissipation system can supply heat to the heat requiring component, the heat requiring component is supplied with heat by the heat dissipation system.

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

[0039] In the case where 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. The temperature of the heat requiring component and the temperature at the cooling liquid circulating valve of the heat dissipation system are continuously detected. If the temperature at the cooling liquid circulating valve of the heat dissipation 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 cooling liquid circulating valve of the heat dissipation system is controlled to be opened to switch the heat dissipation system to supply heat to the heat requiring component.

[0040] The third aspect of the present application provides a wind turbine generator set heat dissipation system, which is applied to the wind turbine generator set heat dissipation system energy efficiency control system. The wind turbine generator set heat dissipation system comprises a cooling liquid storage device, a heat exchange device, a cooling liquid outlet pipeline and a cooling liquid return pipeline. The outlet of the cooling liquid storage device is communicated with the inlet of the heat exchange device through the cooling liquid outlet pipeline. The outlet of the heat exchange device is communicated with the return of the cooling liquid storage device through the cooling liquid return pipeline. The wind turbine generator set heat dissipation system further comprises a cooling liquid circulating pipeline, a cooling liquid circulating valve arranged at the inlet of the cooling liquid circulating pipeline and an outlet valve arranged at the outlet of the cooling liquid circulating pipeline.

[0041] The inlet of the cooling liquid circulating pipeline is communicated with the outlet of the heat exchange device, and is used to guide the cooling liquid heated through heat exchange with the heat dissipation component to the heat requiring component to supply heat to the heat requiring component when the cooling liquid circulating valve is opened.

[0042] According to the above technical means, the cooling liquid heated through heat exchange with the heat dissipation component in the existing heat dissipation system of the wind turbine generator set can be transported to the heat requiring component to heat the heat requiring component through the cooling liquid circulating pipeline added in the heat dissipation system. The heat is recycled, and the self-consumption power of the wind turbine generator set is reduced.

[0043] The fourth aspect of the present application provides a machine readable storage medium, which stores instructions for causing a machine to execute the wind turbine generator set heat dissipation system energy efficiency control method.

[0044] By the technical scheme, the heat emitted by the heat dissipation components is provided to the heat requiring components through the cooling liquid circulation, the integration and fine management of the cooling liquid circulation energy efficiency system and the intelligent adjustment are realized, so that the self-consumption power of the wind turbine is reduced, and the power generation efficiency and the economic operation level of the unit are improved.

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

[0046] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and serve to explain the principles of the present application, but are not intended to limit the present application. In the drawings:

[0047] Figure 1 is a flow chart of a wind turbine heat dissipation system energy efficiency control method provided by an embodiment of the present application;

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

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

[0050] Figure 4 is a control system block diagram of a wind turbine heat dissipation system provided by an embodiment of the present application. DETAILED DESCRIPTION

[0051] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not intended to limit the present application.

[0052] At present, the heat dissipation system of the wind turbine cannot manage the energy efficiency of the heat generating components and the heat dissipation components according to different operating conditions of the unit, and realize intelligent adjustment, mainly in the following aspects:

[0053] The heat dissipation system of the heat generating equipment in the unit and the heating system of the heat requiring components are completely independent, and the heat dissipation function and the heating function realize their functions respectively, without adjusting the circulation and distribution of energy together.

[0054] At present, the heating function of each component of the unit is independently controlled in units of each component, and there is no heating system provided by the unit.

[0055] Due to the complex operating environment of the wind turbine, the working of the heat dissipation system and the heating system is affected by the working condition and has time difference. At present, there is no unified coordination and deployment.

[0056] The above factors result in low energy efficiency of the heat dissipation system of the fan, heat loss of the heat dissipation part, and inability to be reused. The heat requiring components need to be powered separately to provide heat, which increases the energy consumption of the unit.

[0057] Therefore, the current heat energy conversion system of the wind turbine cannot meet the demand of reducing self-consumption and realizing high energy efficiency.

[0058] Figure 1 The wind turbine heat dissipation system energy efficiency control method flow chart provided by an embodiment of the present application is shown in the figure. Figure 1 As shown in the figure, the method comprises:

[0059] S1: Obtain the temperature of the heat requiring component in the wind turbine and the temperature at the cooling liquid circulating valve of the heat dissipation system. The heat requiring component is a component that needs to be heated, and the heat dissipation system is a system that needs to dissipate heat for the heat dissipation component in the wind turbine, which is generally a water cooling system. The heat dissipation component is mostly a high-power component, such as a generator, a gear box and a converter, etc., and the heat requiring component is mostly a low-power component, such as a wind speed meter, a laser radar and a control cabinet, etc. The working time of the former heating and the latter heat dissipation often deviates.

[0060] In some feasible embodiments, the temperature of the heat requiring component and the temperature at the cooling liquid circulating valve of the heat dissipation system are collected by a temperature collection device and then transmitted to a controller.

[0061] S2: Determine the heat source of the heat requiring component according to the temperature of the heat requiring component and the temperature at the cooling liquid circulating 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. Determining the heat source of the heat requiring component according to the temperature of the heat requiring component and the temperature at the cooling liquid circulating valve of the heat dissipation system comprises:

[0063] Comparing the temperature of the heat requiring component and the temperature at the cooling liquid circulating valve of the heat dissipation system;

[0064] If the temperature of the heat requiring component is higher than the temperature at the cooling liquid circulating valve of the heat dissipation system, it is determined that the heat source of the heat requiring component is the heating device of the heat requiring component;

[0065] If the temperature of the heat requiring component is lower than the temperature of the cooling liquid at the cooling liquid circulating valve of the heat dissipation system, it is determined that the heat source of the heat requiring component is the heat dissipation system. Thus, it can be determined whether the cooling liquid of the heat dissipation system can supply heat to the heat requiring component through heat exchange according to the temperature of the heat requiring component and the temperature of the cooling liquid at the cooling liquid circulating valve of the heat dissipation system. If the heat dissipation system cannot supply heat to the heat requiring component, the heat requiring component needs to be heated by the heat requiring component heating device. If the heat dissipation system can supply heat to the heat requiring component, the heat requiring component is heated by the heat dissipation system.

[0066] S3: In the case that the heat source of the heat requiring 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 the cooling liquid in the heat dissipation system flows through the heat requiring component through the cooling liquid circulating pipeline to supply heat to the heat requiring component. The cooling liquid in the heat dissipation system exchanges heat with the heat requiring component after flowing through the heat requiring component, so that the temperature of the heat requiring component is increased and the temperature of the cooling liquid is decreased. After the cooling liquid circulating valve of the heat dissipation system is opened, the cooling liquid with the increased temperature flows through the heat requiring component through the cooling liquid circulating pipeline to exchange heat with the heat requiring component, so that the temperature of the heat requiring component is increased and the temperature of the cooling liquid is decreased. Thus, the method builds a cooling liquid circulating pipeline between the heat requiring component and the heat dissipation component, which is used to control the cooling liquid circulating valve of the heat dissipation system to be opened in the case that the heat source of the heat requiring component is determined to be the heat dissipation system, so that the cooling liquid in the heat dissipation system flows through the heat requiring component through the cooling liquid circulating pipeline to supply heat to the heat requiring component, thereby realizing the heat circulation of the wind turbine generator itself, reducing the use time of the heat requiring component heating device, reducing the self-consumption power of the wind turbine generator, and improving the power generation efficiency and economic operation level of the wind turbine generator.

[0067] Generally, when the wind turbine generator is just connected to the grid, the heat dissipation component just starts to operate, and the heat generated by the heat dissipation component has little effect on the temperature increase of the cooling liquid. At this time, the temperature of the heat requiring component is equivalent to the ambient temperature, and the temperature of the cooling liquid at the cooling liquid circulating valve of the heat dissipation system can be lower than the temperature of the heat requiring component. In this case, the method further comprises:

[0068] In the case that the heat source of the heat requiring component is determined to be the heat requiring component heating device, the heat requiring component heating device is turned on to supply heat to the heat requiring component. The temperature of the heat requiring component and the temperature of the cooling liquid at the cooling liquid circulating valve of the heat dissipation system are continuously detected. If the temperature of the cooling liquid at the cooling liquid circulating valve of the heat dissipation 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 cooling liquid circulating valve of the heat dissipation system is controlled to be opened to switch the heat dissipation system to supply heat to the heat requiring component. Thus, in the case that the temperature of the cooling liquid of the heat dissipation system is increased to be able to supply heat to the heat requiring component, and the heat requiring component still needs to be heated, the heat dissipation system is immediately switched to supply heat to the heat requiring component, the heat requiring component is preferentially heated by the heat dissipation system, and the heat requiring component heating device and the heat dissipation system cooperate with each other to meet the heating demand of the heat requiring component while reducing the self-consumption power of the wind turbine generator.

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

[0070] After obtaining the temperature of the heat requiring component and the temperature at the cooling liquid circulating valve of the heat dissipation system, it is determined whether the current wind turbine generator is in a grid-connected state;

[0071] When the current wind turbine generator is in the grid-connected state, the heat source of the heat requiring component is determined according to the temperature of the heat requiring component and the temperature at the cooling liquid circulating valve of the heat dissipation system;

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

[0073] According to the above technical means, when the wind turbine generator is in the grid-connected state, the heat dissipation system is in a power supply state, at this time, the heat source of the heat requiring component is determined according to the temperature of the heat requiring component and the temperature at the cooling liquid circulating valve of the heat dissipation system, and when the wind turbine generator is in the non-grid-connected state, the heat dissipation system does not work, and the heat requiring component heating device can be directly determined to supply heat to the heat requiring component.

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

[0075] According to the temperature of the heat requiring component, it is determined whether the heat of the heat requiring component itself is sufficient, and in the case where it is determined that the heat of the heat requiring component itself is sufficient, the heating device supplying heat at this time or the cooling liquid circulating valve of the heat dissipation system is closed. The cooling liquid circulating valve of the heat dissipation system and the heating device are controlled according to the heat requiring condition of the heat requiring component, so as to avoid that the temperature of the heat requiring component is too high to affect the service life, and unnecessary energy consumption is reduced.

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

[0077] During the process of supplying heat to the heat requiring component by the heat dissipation system, the temperature of the heat requiring component and the temperature at the cooling liquid circulating valve of the heat dissipation system are continuously detected, if the temperature of the heat requiring component is greater than the temperature at the cooling liquid circulating valve of the heat dissipation system, the cooling liquid circulating valve of the heat dissipation system is closed, and the heat requiring component heating device is opened, so as to switch the heat requiring component heating device to supply heat to the heat requiring component.

[0078] Since the heat dissipation component has large heat dissipation power, in operation, the cooling liquid temperature of the heat dissipation system is relatively high, and the heat requiring component is mainly a sensor component, and when the heat requiring component needs to be heated, the temperature is very low, therefore, in practice, there is almost no case that the temperature of the heat requiring component is higher than the cooling liquid temperature of the heat dissipation system when the heat requiring component needs 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 heat requiring component heating device is switched to heat the heat requiring component to meet the heating demand of the heat requiring component, thereby preferentially ensuring normal operation of the heat requiring component.

[0080] The wind turbine generator set heat dissipation system energy efficiency control method of the present application will be described below taking the heat dissipation system as a water cooling system as an example and combining the specific control process.

[0081] As shown in Figure 2 the method of the present application, when executed, first determines whether the wind turbine generator set is in a grid-connected operation state or a non-grid-connected operation state, and if the wind turbine generator set is in a non-grid-connected operation state, determines whether the heat requiring component needs to be heated, and if the heat requiring component needs to be heated, heats the heat requiring component through the heat requiring component heating device; when the wind turbine generator set is in a grid-connected operation state, further determines whether the heat dissipation system is running, i.e., whether the water cooling system is running, and if the water cooling system is not running, determines whether the heat requiring component needs to be heated, and if the heat requiring component needs to be heated, heats the heat requiring component through the heat requiring component heating device; if the water cooling system is running, further determines whether the heat requiring component needs to be heated, and if the heat requiring component does not need to be heated, returns to continue determining whether the wind turbine generator set is in a grid-connected operation state or a non-grid-connected operation state, and if the heat requiring component needs to be heated, determines whether the temperature of the heat requiring component is less than the temperature at the cooling liquid circulation valve of the heat dissipation system, i.e., whether the temperature of the heat requiring component is less than the temperature of the water cooling system, and if the temperature of the heat requiring component is greater than the temperature of the water cooling system, directly heats the heat requiring component through the heat requiring component heating device; if the temperature of the heat requiring component is less than the temperature of the water cooling system, opens the cooling liquid circulation valve of the heat dissipation system and starts the water cooling system to supply heat. During the water cooling system heat supply process, the temperature of the heat requiring component is continuously detected to determine whether the demand is met, and in the case where the demand is met, the process returns to continue determining whether the wind turbine generator set is in a grid-connected operation state or a non-grid-connected operation state, and in the case where the demand is not met, the temperature of the heat requiring component is continuously detected to determine whether the temperature of the heat requiring component is less than the temperature of the water cooling system, and if the temperature of the heat requiring component is greater than the temperature of the water cooling system, the cooling liquid circulation valve of the heat dissipation system is closed and the heat requiring component is heated through the heat requiring component heating device, and the above steps are repeated until the heating is completed and the heat requiring component heating device currently heating the heat requiring component or the cooling liquid circulation valve of the heat dissipation system is closed.

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

[0083] a temperature acquisition device for acquiring the temperature of the heat requiring component in the wind turbine generator set and the temperature at the cooling liquid circulation valve of the heat dissipation system;

[0084] a controller configured to determine a heat source of the heat requiring component according to the temperature of the heat requiring component and the temperature at the cooling liquid circulation valve of the heat dissipating system, and control the cooling liquid circulation valve of the heat dissipating system to open to make the cooling liquid in the heat dissipating system flow through the heat requiring component via the cooling liquid circulation pipeline to heat the heat requiring component when the heat source of the heat requiring component is determined to be the heat dissipating system.

[0085] According to the above technical means, the system builds the cooling liquid circulation pipeline between the heat requiring component and the heat dissipating component, and is configured to control the cooling liquid circulation valve of the heat dissipating system to open to make the cooling liquid in the heat dissipating system flow through the heat requiring component via the cooling liquid circulation pipeline to heat the heat requiring component when the heat source of the heat requiring component is determined to be the heat dissipating system, so as to realize the heat circulation of the wind turbine generator, reduce the use time of the heat requiring component heating device, reduce the self-consumption power of the wind turbine generator, and improve the power generation efficiency and economic operation level of the wind turbine generator.

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

[0087] compare the temperature of the heat requiring component with the temperature at the cooling liquid circulation valve of the heat dissipating system;

[0088] if the temperature of the heat requiring component is higher than the temperature at the cooling liquid circulation valve of the heat dissipating system, determine that the heat source of the heat requiring component is the heat requiring component heating device;

[0089] if the temperature of the heat requiring component is lower than the temperature at the cooling liquid circulation valve of the heat dissipating system, determine that the heat source of the heat requiring component is the heat dissipating system.

[0090] According to the above technical means, the temperature of the heat requiring component and the temperature at the cooling liquid circulation valve of the heat dissipating system can be used to determine whether the cooling liquid of the heat dissipating system can heat the heat requiring component through heat exchange, if the heat dissipating system cannot heat the heat requiring component, the heat requiring component heating device needs to be used to heat the heat requiring component, and if the heat dissipating system can heat the heat requiring component, the heat dissipating system is used to heat the heat requiring component.

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

[0092] when the heat source of the heat requiring component is determined to be the heat requiring component heating device, turn on the heat requiring component heating device to heat the heat requiring component, and continuously detect the temperature of the heat requiring component and the temperature at the cooling liquid circulation valve of the heat dissipating system, if the temperature at the cooling liquid circulation valve of the heat dissipating system is higher than the temperature of the heat requiring component and the heat requiring component still needs to be heated, turn off the heat requiring component heating device and control the cooling liquid circulation valve of the heat dissipating system to open to switch the heat dissipating system to heat the heat requiring component.

[0093] The third aspect of the present application provides a wind turbine cooling system, which is applied to the wind turbine cooling system energy efficiency control system, and comprises a cooling liquid storage device, a heat exchange device, a cooling liquid outlet pipeline and a cooling liquid return pipeline, the outlet of the cooling liquid storage device is communicated with the inlet of the heat exchange device through the cooling liquid outlet pipeline, and the outlet of the heat exchange device is communicated with the return of the cooling liquid storage device through the cooling liquid return pipeline; the wind turbine cooling system further comprises a cooling liquid circulation pipeline, a cooling liquid circulation valve arranged at the inlet of the cooling liquid circulation pipeline and an outlet valve arranged at the outlet of the cooling liquid circulation pipeline.

[0094] The inlet of the cooling liquid circulation pipeline is communicated with the outlet of the heat exchange device, and is used to guide the cooling liquid heated through heat exchange with the cooling part to the heat requiring part to heat the heat requiring part when the cooling liquid circulation valve is opened.

[0095] According to the above technical means, the cooling liquid circulation pipeline added in the existing wind turbine cooling system can transport the cooling liquid heated through heat exchange with the cooling part to the heat requiring part to heat the heat requiring part, and the heat is recycled, so that the self-consumption power of the wind turbine is reduced.

[0096] In some feasible embodiments, the wind turbine cooling system energy efficiency control system can be an independent control system, and the independent control system exchanges data and unit states with the main control system of the wind turbine through communication. Figure 4 As shown in the figure, the temperature collecting device collects the temperature of the cooling liquid circulation valve of the cooling system and the temperature of the heat requiring part, the heat generated by the cooling part such as the generator, the converter and the gear box is taken away by the cooling system, the controller controls the cooling liquid circulation valve to be opened, so that the cooling system and the heat requiring system are conducted through the cooling liquid circulation pipeline, the cooling liquid with high temperature in the cooling system flows to the heat requiring system to heat the heat requiring part, and the heat requiring part can be the anemometer, the laser radar and other parts.

[0097] In some feasible embodiments, the wind turbine cooling system energy efficiency control system can also be integrated into the main control system.

[0098] The fourth aspect of the present application provides a machine readable storage medium, and the machine readable storage medium stores instructions for causing a machine to execute the wind turbine cooling system energy efficiency control method.

[0099] Those skilled in the art can understand that all or part of the steps of the method for implementing the above-mentioned embodiments can be completed by programs instructing relevant hardware, the programs are stored in a storage medium, and the programs include a plurality of instructions for enabling a single-chip microcomputer, a chip or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various storage media capable of storing program codes.

[0100] The optional embodiments of the present application are described in detail above in combination with the drawings, but the embodiments of the present application are not limited to the specific details in the above-described embodiments. Within the technical concept scope of the embodiments of the present application, various simple modifications can be made to the technical solutions of the embodiments of the present application, and these simple modifications all belong to the protection scope of the embodiments of the present application. In addition, it should be noted that each specific technical feature described in the above-described specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the embodiments of the present application will not be described again for various possible combinations.

[0101] In addition, various different embodiments of the present application can also be combined in any manner, as long as it does not deviate from the idea of the embodiments of the present application, and it should also be considered as disclosed by the embodiments of the present application.

Claims

1. A method for energy efficiency control of a wind turbine generator cooling system, characterized in that, The method includes: Obtain the temperatures of heat-requiring components in the wind turbine generator set and the temperatures at the coolant circulation valves of the cooling system. The source of heat for the heat-requiring component is determined based on the temperature of the heat-requiring component and the temperature at the coolant circulation valve of the heat dissipation system, including: Compare the temperatures of heat-requiring components with the temperatures at the coolant circulation valves in the heat dissipation system; If the temperature of the heat-requiring component is higher than the temperature at the coolant circulation valve of the heat dissipation system, then the heat source of the heat-requiring component is determined to be the heat-requiring component heating device; If the temperature of the heat-requiring component is lower than the temperature at the coolant circulation valve of the heat dissipation system, then the heat source of the heat-requiring component is determined to be the heat dissipation system. When it is determined that the heat source of the heat-requiring component is the heat dissipation system, the coolant circulation valve of the heat dissipation system is opened to allow the coolant in the heat dissipation system to flow through the coolant circulation pipe to the heat-requiring component and provide heat to the heat-requiring component. The coolant is the coolant that has flowed through the heat dissipation component and whose temperature has increased. If the heat source for the heat-requiring component is determined to be the heat-requiring component heating device, the heat-requiring component heating device is turned on to supply heat to the heat-requiring component. The temperature of the heat-requiring component and the temperature at the coolant circulation valve of the heat dissipation system are continuously monitored. If the temperature at the coolant circulation valve of the heat dissipation 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 heat dissipation system is opened to switch the heat dissipation system to supply heat to the heat-requiring component.

2. The energy efficiency control method for the cooling system of a wind turbine generator set according to claim 1, characterized in that, The method further includes: After obtaining the temperature of the heat-requiring components and the temperature at the coolant circulation valve of the heat dissipation system, it is determined whether the wind turbine generator is currently in grid-connected status. When the wind turbine generator is currently in grid-connected state, the source of heat for the heat-requiring components is determined based on the temperature of the heat-requiring components and the temperature at the coolant circulation valve of the heat dissipation system. When the wind turbine is currently out of grid connection, the heating device for the heat-requiring components is turned on to supply heat to the heat-requiring components until the wind turbine enters the grid connection state.

3. The energy efficiency control method for the cooling system of a wind turbine generator set according to claim 1, characterized in that, The method further includes: During the process of supplying heat to the heat-requiring components through the heat dissipation system, the temperature of the heat-requiring components and the temperature at the coolant circulation valve of the heat dissipation system are continuously monitored. If the temperature of the heat-requiring components is greater than the temperature at the coolant circulation valve of the heat dissipation system, the coolant circulation valve of the heat dissipation system is closed and the heating device of the heat-requiring components is opened to switch the heating device of the heat-requiring components to supply heat to the heat-requiring components.

4. An energy efficiency control system for a wind turbine generator cooling system, characterized in that, The system includes: Temperature acquisition device is used to collect the temperature of heat-requiring components in wind turbine generator sets and the temperature at the coolant circulation valve of the heat dissipation system; A controller is configured to determine the heat source of the heat-requiring component based on the temperature of the heat-requiring component and the temperature at the coolant circulation valve of the heat dissipation system. This includes: comparing the temperature of the heat-requiring component with the temperature at the coolant circulation valve of the heat dissipation system; if the temperature of the heat-requiring component is higher than the temperature at the coolant circulation valve of the heat dissipation system, then determining that the heat source is a heating device for the heat-requiring component; if the temperature of the heat-requiring component is lower than the temperature at the coolant circulation valve of the heat dissipation system, then determining that the heat source is the heat dissipation system; and, if the heat source is determined to be the heat dissipation system, controlling the coolant circulation valve of the heat dissipation system to open, so that the coolant in the heat dissipation system flows through the coolant circulation pipe to the heat-requiring component, thereby supplying heat to the heat-requiring component. The coolant is the coolant that has flowed through the heat dissipation component and whose temperature has increased. If the heat source for the heat-requiring component is determined to be the heat-requiring component heating device, the heat-requiring component heating device is turned on to supply heat to the heat-requiring component. The temperature of the heat-requiring component and the temperature at the coolant circulation valve of the heat dissipation system are continuously monitored. If the temperature at the coolant circulation valve of the heat dissipation 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 heat dissipation system is opened to switch the heat dissipation system to supply heat to the heat-requiring component.

5. A wind turbine generator cooling system, applied to the energy efficiency control system of the wind turbine generator cooling system as described in claim 4, 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 via the coolant outlet pipe, and the outlet of the heat exchange device is connected to the return port of the coolant storage device via the coolant return pipe; characterized in that, The wind turbine generator cooling system also includes: a coolant circulation pipe, a coolant circulation valve installed at the inlet of the coolant circulation pipe, and an outlet valve installed at the outlet of the coolant circulation pipe. The inlet of the coolant circulation pipe is connected to the outlet of the heat exchange device, which is used to guide the coolant, which has been heated by heat exchange with the heat dissipation components, to the heat-requiring components when the coolant circulation valve is opened, so as to provide heat to the heat-requiring components.

6. A machine-readable storage medium storing instructions for causing a machine to perform the energy efficiency control method for a wind turbine generator cooling system according to any one of claims 1-3 of this application.

Images