Component lubricating system for wind generating set in power failure state

Abstract

The utility model relates to a part lubricating system in a power failure state of a wind generating set, which comprises a control assembly, a light storage power supply assembly, a diesel generator power supply assembly and a fan oil pump assembly, the control assembly comprises a controller and a contactor, and the light storage power supply assembly comprises a photovoltaic panel. The diesel generator power supply assembly comprises a starting motor and a diesel generator, the fan oil pump assembly comprises an oil pump, the controller is connected with a contactor, the photovoltaic panel is connected with the diesel generator through the starting motor, and the contactor is arranged on a connecting channel of the photovoltaic panel and the diesel generator. The photovoltaic panel and the diesel generator are connected with a direct-current oil pump and an alternating-current oil pump respectively, and contactors are arranged on a connecting channel of the photovoltaic panel and the direct-current oil pump and a connecting channel of the diesel generator and the alternating-current oil pump. Compared with the prior art, the utility model effectively solves the problem of failure of large components under the condition of long-term power failure.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind power generation, and relates to a component lubrication system of a wind turbine under a power outage state. Background Technique

[0002] The prior art discloses a variety of lubrication systems for wind turbine gearboxes. Some collect grease during spraying lubrication by starting an oil pump, and recycle the lubricating oil by means of cylinder extrusion; some increase multi-precision filter elements to meet the requirement of automatically adjusting the precision of the oil fluid with the change of oil temperature after starting the oil pump, so as to improve the lubrication effect of the oil pump. The above solutions mainly adjust and optimize the oil pump structure and lubrication method under the electrified state to solve the problem of poor lubrication of large components, but the lubrication problem of wind turbines under long-term power failure cannot be solved. The prior art discloses the long-term storage technology of large marine gearboxes, and solves the rust problem through anti-rust and sealing technologies such as closed anti-rust technology and monitoring technology. However, the large components of wind turbines cannot solve the problems of rust and turning marks through simple sealing.

[0003] The prior art charges a capacitor by adding a photovoltaic panel, and adjusts and conveys the electric energy to the load through an external frequency converter. When there is no sunlight and the charging state of the battery is too low, the generator set is used for power supply and energy storage, and seamless switching of the operation mode is realized through a fast switching system among multiple power supplies. The core of the prior art solution is to charge and discharge the energy storage device through a generator or a photovoltaic panel connected to a frequency converter to reduce the working time of the diesel generator itself. However, installing a photovoltaic panel under a wind turbine will be greatly limited by the shielding of the wind turbine tower barrel, and the charging will be greatly restricted. Moreover, working scenarios such as long-term shutdown and open air are not friendly to this solution, resulting in a large number of power electronic devices that need to run for a long time, more complex control and increased self-power consumption. Instead, the battery voltage may be too low, leading to frequent starting of the diesel generator. Therefore, the practicality of this solution in this scenario is not high. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a component lubrication system of a wind turbine under a power outage state in order to overcome at least one defect existing in the above prior art. The utility model effectively solves the problem of failure of large components under long-term power outage.

[0005] The purpose of the utility model can be realized by the following technical solutions:

[0006] One of the technical solutions of the present utility model is to provide a component lubrication system for a wind power generation unit in a power outage state. The system includes a control component, a photovoltaic-storage power supply component, a diesel generator power supply component, and a fan oil pump component. The control component includes a controller and a contactor. The photovoltaic-storage power supply component includes a photovoltaic panel. The diesel generator power supply component includes a starting motor and a diesel generator. The fan oil pump component includes an oil pump. The controller is connected to the contactor. The photovoltaic panel is connected to the diesel generator through the starting motor. A contactor is provided on the connection path between the photovoltaic panel and the diesel generator. The photovoltaic panel and the diesel generator are respectively connected to the DC and AC oil pumps. Contactors are provided on the connection paths between the photovoltaic panel and the DC oil pump and between the diesel generator and the AC oil pump. The controller commands the closing and opening of the contactor to control the operation and stop of the motor or the oil pump. The AC circuit of the oil pump is controlled through the DC circuit of the starting motor. The diesel generator power supply component and the photovoltaic-storage power supply component supply power to the oil pumps of different AC and DC forms.

[0007] Further, the photovoltaic-storage power supply component further includes a battery pack. The photovoltaic panel is connected to the battery pack, and the battery pack is used to establish a backup power supply for continuous power supply.

[0008] Further, the contactor includes a starting motor contactor. The battery pack is connected in parallel to the controller and the starting motor contactor. The battery pack is used to supply power to the controller and control the power supply to the starting motor and the generator oil pump.

[0009] Further, the contactor further includes a generator oil pump power supply contactor. The starting motor contactor is connected in parallel to the starting motor and the generator oil pump power supply contactor. The starting motor contactor is used to control the closing and opening of the power supply path of the starting motor and the generator oil pump.

[0010] Further, the oil pump includes a generator oil pump. The generator oil pump power supply contactor is connected to the generator oil pump. When the generator oil pump power supply contactor is closed, the generator oil pump is started and operated.

[0011] The generator oil pump is a DC oil pump, and the generator oil pump is used to lubricate the generator in the wind power generation unit.

[0012] Further, the starting motor is connected to the rotor of the diesel generator, and the starting motor is used to drive the rotor of the diesel generator to rotate.

[0013] As a preferred technical solution, the diesel generator power supply component is grounded for protection.

[0014] Further, the contactor further includes a contactor for supplying power to the gearbox oil pump. The stator coil of the diesel generator is connected to the contactor for supplying power to the gearbox oil pump. When the electromagnetic coil in the rotor cuts the magnetic lines of force in the stator, an electromotive force will be induced in the stator coil. The diesel generator is used to supply power to the gearbox oil pump.

[0015] Further, the oil pump further includes a gearbox oil pump. The contactor for supplying power to the gearbox oil pump is connected to the gearbox oil pump. When the contactor for supplying power to the gearbox oil pump is closed, the gearbox oil pump is started and operated.

[0016] The gearbox oil pump is an AC oil pump, and the gearbox oil pump is used to lubricate the gearbox in the wind power generation unit.

[0017] Further, the digital output (DO) of the controller is connected to the coils of the starting motor contactor, the contactor for supplying power to the gearbox oil pump, and the contactor for supplying power to the generator oil pump. The controller is used to control the closing or opening of the contactor.

[0018] As a preferred technical solution, the controller is connected to the diesel generator to detect the voltage of the diesel generator during no-load operation.

[0019] Further, the control component, the photovoltaic and energy storage power supply component, and the diesel generator power supply component are all installed in the chassis. The chassis is provided with an anti-theft lock and a positioning device as a safety backup protection in the wild.

[0020] One of the technical solutions of the present utility model is to provide a method for lubricating the power outage components of a wind power generation unit. This method uses the described system for lubrication, and the method includes the following steps:

[0021] The controller sets the start interval time parameter and the start operation duration parameter of the system. In the design, to avoid the problem of battery pack power shortage caused by the long-term non-operation of the generator and the self-power consumption of the equipment, the photovoltaic panel is used to continuously charge the battery pack.

[0022] The power supply of the controller is provided by the battery pack, and the controller starts timing after the initialization is completed.

[0023] When the monitored stop time of the diesel generator reaches the start interval time parameter of the system, the controller commands the starting motor contactor to close, and the diesel generator is driven to operate without load through the starting motor. The no-load output is monitored by the controller. After the voltage is stable, the controller commands the contactor for supplying power to the gearbox oil pump and the contactor for supplying power to the generator oil pump to close, and the gearbox oil pump and the generator oil pump in the wind power generation unit are started for lubrication.

[0024] When the contactor for supplying power to the gearbox oil pump and the contactor for supplying power to the generator oil pump are closed, the controller starts to record the closing time at this time.

[0025] When the closing time of the power supply contactor of the gearbox oil pump and the power supply contactor of the generator oil pump reaches the start-up operation duration parameter of the system, the controller commands the power supply contactor of the generator oil pump, the starting motor contactor and the power supply contactor of the gearbox oil pump to disconnect in sequence. After all are disconnected, the controller issues a flameout pull wire command to the diesel generator, and the diesel generator stops;

[0026] The controller starts to re-time and repeats the cycle.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] (1) The utility model protects large components such as the generator and gearbox of the wind turbine generator set, and forcibly pumps lubricating oil under the power-off state of the large components, effectively solving the problems of tooth surface parking marks and rust failure caused by the inability of the lubricating pump to operate during long-term power-off of the large components, and avoiding major property losses caused by the failure of the large components;

[0029] (2) The utility model adopts two sets of power supply components, namely diesel generator and photovoltaic energy storage, to adapt to gearboxes and generator oil pumps with different AC and DC forms. The controller can start the oil pump lubrication regularly, avoiding the problem of large component failure under long-term power-off conditions, and at the same time avoiding the problems of self-power consumption of the equipment under continuous power supply, fluctuations in the photovoltaic energy storage power affected by the weather, and frequent starting of the diesel generator;

[0030] (3) The structure of the utility model is simply connected, the diesel generator and the controller are mature and have low failure rates, it can meet the long-term outdoor high and low temperature and humidity environments in different environments, has low cost, high stability, low failure rate, mature technical solutions, strong reusability, and can meet a variety of working scenarios;

[0031] (4) The utility model is compact, simple and convenient to transport. It can be transported by a small truck or a pickup truck. The chassis has an anti-theft lock and a positioning device as a safety backup protection in the wild. The equipment does not need on-site assembly when it arrives. The diesel generator, controller and other components are encapsulated by the box body, and the cable is installed on-site to the power supply terminal in the wind turbine. Description of the Drawings

[0032] Figure 1 It is a schematic structural diagram of the component lubrication system of the wind turbine generator set under the power-off state in the embodiment of the utility model.

[0033] Marking description in the figure:

[0034] 1 - Controller, 2 - Battery pack, 3 - Photovoltaic panel, 4 - Starting motor contactor, 5 - Starting motor, 6 - Diesel generator, 7 - Power supply contactor of gearbox oil pump, 8 - Power supply contactor of generator oil pump, 9 - Gearbox oil pump, 10 - Generator oil pump. Detailed Embodiment

[0035] The present utility model will be described in detail below in conjunction with specific embodiments. These embodiments are implemented on the premise of the technical solution of the present utility model, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present utility model is not limited to the following embodiments.

[0036] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are used to describe common objects, only representing different instances referring to the same object, and do not imply that the objects described in this way must be in a given order, whether in terms of time, space, sorting, or any other way.

[0037] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] Embodiment:

[0039] A component lubrication system for a wind turbine generator in a power outage state, as Figure 1 shown, includes a control component, a photovoltaic-storage power supply component, a diesel generator power supply component, and a fan oil pump component. The control component includes a controller 1 and a contactor. The photovoltaic-storage power supply component includes a photovoltaic panel 3. The diesel generator power supply component includes a starting motor 5 and a diesel generator 6. The fan oil pump component includes an oil pump. The controller 1 is connected to the contactor. The photovoltaic panel 3 is connected to the diesel generator 6 through the starting motor 5. A contactor is provided on the connection path between the photovoltaic panel 3 and the diesel generator 6. The photovoltaic panel 3 and the diesel generator 6 are respectively connected to a DC oil pump and an AC oil pump. Contactors are provided on the connection paths between the photovoltaic panel 3 and the DC oil pump and between the diesel generator 6 and the AC oil pump. The controller 1 commands the closing and opening of the contactor to control the operation and stop of the motor or the oil pump. The AC circuit of the oil pump is controlled through the DC circuit of the starting motor 5. The diesel generator power supply component and the photovoltaic-storage power supply component supply power to oil pumps of different AC and DC forms.

[0040] The photovoltaic and energy storage power supply assembly further includes a battery pack 2. The photovoltaic panel 3 is connected to the battery pack 2, and the battery pack 2 is used to establish a backup power supply for continuous power supply;

[0041] The contactor includes a starting motor contactor 4. The battery pack 2 is connected in parallel to the controller 1 and the starting motor contactor 4. The battery pack 2 is used to supply power to the controller 1 and control the power supply to the starting motor 5 and the generator oil pump 10;

[0042] The contactor further includes a generator oil pump power supply contactor 8. The starting motor contactor 4 is connected in parallel to the starting motor 5 and the generator oil pump power supply contactor 8. The starting motor contactor 4 is used to control the closing and opening of the power supply path of the starting motor 5 and the generator oil pump 10;

[0043] The oil pump includes a generator oil pump 10. The generator oil pump power supply contactor 8 is connected to the generator oil pump 10. When the generator oil pump power supply contactor 8 is closed, the generator oil pump 10 can be started and operated;

[0044] The generator oil pump 10 is a DC oil pump and is used to lubricate the generator in the wind power generation set;

[0045] The starting motor 5 is connected to the rotor of the diesel generator 6, and the starting motor 5 is used to drive the rotor of the diesel generator 6 to rotate;

[0046] The diesel generator power supply assembly is grounded for protection;

[0047] The contactor further includes a gearbox oil pump power supply contactor 7. The stator coil of the diesel generator 6 is connected to the gearbox oil pump power supply contactor 7. When the electromagnetic coil in the rotor cuts the magnetic force lines in the stator, an electromotive force will be induced in the stator coil. The diesel generator 6 is used to supply power to the gearbox oil pump 9;

[0048] The oil pump further includes a gearbox oil pump 9. The gearbox oil pump power supply contactor 7 is connected to the gearbox oil pump 9. When the gearbox oil pump power supply contactor 7 is closed, the gearbox oil pump 9 can be started and operated;

[0049] The gearbox oil pump 9 is an AC oil pump and is used to lubricate the gearbox in the wind power generation set;

[0050] The digital output (DO) of the controller 1 is connected to the coils of the starting motor contactor 4, the gearbox oil pump power supply contactor 7, and the generator oil pump power supply contactor 8. The controller 1 is used to control the closing or opening of the contactor;

[0051] The controller 1 is connected to the diesel generator 6 to detect the voltage of the diesel generator 6 during no-load operation;

[0052] The control component, the photovoltaic and energy storage power supply component, and the diesel generator power supply component are all installed inside the chassis. The chassis is equipped with an anti-theft lock and a positioning device, serving as a safety backup protection in the wild.

[0053] In this embodiment, the controller 1 is a SmartGen-HGM7110N controller with a power supply of DC (8 - 35)V and a power consumption of <4W (≤2W during standby). The battery pack 2 is a 100A·h - 24V battery pack. The photovoltaic panel 3 is a 4V - 150W photovoltaic panel. The starting motor contactor 4 and the generator oil pump power supply contactor 8 are 24V - 5A DC contactors. The starting motor 5 is a 24V DC motor. The diesel generator 6 is a 50kW - 690V AC diesel generator set. The gearbox oil pump power supply contactor 7 is a 24V / 690V AC contactor. The gearbox oil pump 9 is an 11kW - 690V AC oil pump motor. The generator oil pump 10 is a 24V / 75W DC oil pump motor.

[0054] A lubrication method for the components of a wind turbine during power outage uses the above system for lubrication, and the specific steps are as follows:

[0055] The controller 1 sets the start interval time parameter (default 3 months) and the start running duration parameter (default 30min) of the system. In the design, to avoid the problem of the battery pack 2 discharging due to the generator not running for a long time and the self-power consumption of the equipment, the photovoltaic panel 3 continuously charges the battery pack 2.

[0056] The power supply of the controller 1 is provided by the battery pack 2, and the timing starts after the initialization of the controller 1 is completed.

[0057] When the monitored stop time of the diesel generator 6 reaches the start interval time parameter of the system, the controller 1 commands the starting motor contactor 4 to close, and drives the diesel generator 6 to run no-load through the starting motor 5. The no-load output is monitored by the controller 1. After the voltage is stable, the controller 1 commands the gearbox oil pump power supply contactor 7 and the generator oil pump power supply contactor 8 to close, and the gearbox oil pump 9 and the generator oil pump 10 in the wind turbine start lubrication.

[0058] When the gearbox oil pump power supply contactor 7 and the generator oil pump power supply contactor 8 are closed, the controller 1 starts to record the closing time at this time.

[0059] When the closing time of the gearbox oil pump power supply contactor 7 and the generator oil pump power supply contactor 8 reaches the start running duration parameter of the system, the controller 1 commands the generator oil pump power supply contactor 8, the starting motor contactor 4, and the gearbox oil pump power supply contactor 7 to disconnect in sequence. After all are disconnected, the controller 1 issues a flameout pull wire command to the diesel generator 6, and the diesel generator 6 stops.

[0060] The controller 1 starts to re-time and repeats the cycle.

[0061] When the diesel generator 6 is not running, in order to reduce the power consumption of the battery pack 2, the controller 1 is in the standby low-power consumption mode at this time, only performing basic data sampling and timing (the power consumption during standby ≤ 2W). The start state or manual state of the diesel generator 6 will switch back to the normal operation mode.

[0062] The above description of the embodiments is for the convenience of those of ordinary skill in the art to understand and use the utility model. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the present utility model is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present utility model according to the disclosure of the present utility model should be within the protection scope of the present utility model.

Claims

1. A component lubrication system for a wind turbine generator set in a power outage state, characterized in that: The system comprises a control component, a photovoltaic power supply component, a diesel power supply component and a fan oil pump component, wherein the control component comprises a controller (1) and a contactor, the photovoltaic power supply component comprises a photovoltaic panel (3), the diesel power supply component comprises a starter motor (5) and a diesel generator (6), and the fan oil pump component comprises an oil pump. The controller (1) is connected to the contactor, the photovoltaic panel (3) is connected to the diesel generator (6) via the starter motor (5), a contactor is provided on the connection path between the photovoltaic panel (3) and the diesel generator (6), the photovoltaic panel (3) and the diesel generator (6) are respectively connected to a direct current oil pump and an alternating current oil pump, and a contactor is provided on the connection path between the photovoltaic panel (3) and the direct current oil pump and the connection path between the diesel generator (6) and the alternating current oil pump.

2. A component lubrication system for a wind turbine generator set in a power outage state according to claim 1, characterized in that: The photovoltaic power supply assembly also includes a battery pack (2), and the photovoltaic panel (3) is connected to the battery pack (2).

3. A component lubrication system for a wind turbine generator set in a power outage state according to claim 2, characterized in that: The contactor comprises a starter motor contactor (4), and the storage battery pack (2) is connected in parallel to the controller (1) and the starter motor contactor (4).

4. A component lubrication system for a wind turbine generator set in a power outage state according to claim 3, characterized in that: The contactor also includes a generator oil pump power supply contactor (8), and the starter motor contactor (4) is connected in parallel to the starter motor (5) and the generator oil pump power supply contactor (8).

5. A component lubrication system for a wind turbine generator set in a power outage state according to claim 4, characterized in that: The oil pump comprises a generator oil pump (10), the generator oil pump power supply contactor (8) is connected to the generator oil pump (10), and the generator oil pump (10) adopts a direct current oil pump.

6. A component lubrication system for a wind turbine generator set in a power outage state according to claim 4, characterized in that: The starter motor (5) is connected to the rotor of the diesel generator (6).

7. A component lubrication system for a wind turbine generator set in a power outage state according to claim 6, characterized in that: The contactor also includes a gear box oil pump power supply contactor (7), and the stator coil of the diesel generator (6) is connected to the gear box oil pump power supply contactor (7).

8. A component lubrication system for a wind turbine generator set in a power outage state according to claim 7, characterized in that: The oil pump also includes a gear box oil pump (9), the gear box oil pump power supply contactor (7) is connected to the gear box oil pump (9), and the gear box oil pump (9) adopts an AC oil pump.

9. A component lubrication system for a wind turbine generator set in a power outage state according to claim 7, characterized in that: The digital output of the controller (1) is connected to the coils of the starter motor contactor (4), the gear box oil pump power supply contactor (7) and the generator oil pump power supply contactor (8).

10. A component lubrication system for a wind turbine generator set in a power outage state according to claim 1, characterized in that: The control component, the photovoltaic power supply component and the diesel power supply component are all installed in a chassis, and the chassis is provided with an anti-theft lock and a positioning device.

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