Wind power converter control method, control device and wind power converter
A technology for wind power converters and control methods, applied in the field of control devices, wind power converters, and control methods for wind power converters, which can solve the problem of uninterruptible power supplies that are difficult to simultaneously start filter capacitor switching circuit breakers and filter capacitor switching switches circuit breaker can not be closed normally, so as to reduce the impact and improve the reliability
Active Publication Date: 2022-07-12
BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD
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Problems solved by technology
However, the power of the existing uninterruptible power supply is difficult to start the filter capacitor switching circuit breakers in the master cabinet and the slave cabinet at the same time
Taking the existing 2.5MW wind power converter as an example, the wind power converter uses an uninterruptible power supply (UPS) with a power of 2000Var to simultaneously start two filter capacitor switching circuit breakers with a power of 1800Var, which is likely to cause two filter The capacitor switching circuit breaker cannot be closed normally; (2) The power supply inside the wind power converter provides power to the filter capacitor switching circuit breaker in the master cabinet and the slave cabinet at the same time
However, when complex working conditions such as low voltage ride through occur, the filter capacitor switching circuit breakers in the master cabinet and the slave cabinet cannot be closed normally
Method used
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[0033] Various example embodiments will now be described more fully with reference to the accompanying drawings, in which some example embodiments are shown.
[0034] Refer below Figure 1 to Figure 5 The control method and control device of the wind power converter according to the embodiments of the present invention are described.
[0035] figure 1 A flowchart showing a control method of a wind power converter according to an embodiment of the present invention.
[0036] In step S10, in response to the input command from the main controller of the wind turbine, the first converter cabinet of the wind power converter is controlled to perform pre-charging at the first moment.
[0037] As an example, the activation command from the main controller of the wind turbine may be a activation command instructing the activation of the filter capacitor of the wind power converter.
[0038] In step S12, it is determined whether the first bus voltage of the DC bus in the first conver...
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The present invention provides a control method, a control device and a wind power converter for a wind power converter. The control method includes: controlling a first converter cabinet at a first moment in response to an input command from a main controller of a wind power generator set Perform pre-charging; determine whether the first bus voltage reaches the first predetermined threshold; when it is determined that the first bus voltage reaches the first predetermined threshold, control the first filter capacitor to switch the circuit breaker to close; in response to the input command, at night Controlling the second converter cabinet to pre-charge at the second time of the first time; determining whether the voltage of the second busbar reaches the second predetermined threshold; when it is determined that the voltage of the second busbar reaches the second predetermined threshold, controlling the second filter capacitor to switch on and off Circuit breaker closed. The wind power converter control method, control device and wind power converter of the present invention realize the filter capacitor switching protection of the wind power converter by asynchronously closing the filter capacitor switching circuit breaker in the two converter cabinets.
Description
technical field [0001] The present invention generally relates to the technical field of wind power, and more particularly, to a control method, a control device and a wind power converter of a wind power converter. Background technique [0002] The wind power converter is one of the core components of the wind power generation system, which can optimize the operation of the wind power generation system and improve the utilization rate of wind energy. Generally, a wind power converter includes two main cabinets and slave cabinets with identical main circuits. Both the master cabinet and the slave cabinet have filter capacitor switching circuit breakers, which require energy to close. [0003] Existing wind power converters generally use the following two methods to provide energy for the filter capacitor switching circuit breaker: (1) use an uninterruptible power supply (UPS) to provide energy for the filter capacitor switching circuit breaker. However, the power of the exi...
Claims
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IPC IPC(8): H02M1/00
CPCH02M1/00H02M1/0003Y02E10/76
Inventor 刘佳马忠宝吕梁年
Owner BEIJING GOLDWIND SCI & CREATION WINDPOWER EQUIP CO LTD