Control method and system for voltage source wind turbine considering load and speed constraints
A speed control, wind turbine technology, applied in the direction of speed control, control system use, engine control, etc., can solve problems such as speed overspeed, reduce load impact, avoid speed overspeed or underspeed faults
Active Publication Date: 2021-08-31
ZHEJIANG WINDEY
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Problems solved by technology
[0006] The present invention aims to overcome the technical problem of active power coordination between the main control system of the voltage source wind turbine and the converter in the prior art, and provide a control method and system for the voltage source wind turbine considering load and speed constraints, which solves the problem of voltage The problem of active power coordination between the main control system of the source-type wind turbine and the converter can avoid overspeed or underspeed faults; reduce the load impact of the transmission chain shafting of the voltage source wind turbine under the grid frequency disturbance condition
Method used
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Embodiment 1
[0053] Embodiment 1: The voltage source wind turbine control system considering the load and speed constraints of this embodiment, such as figure 1 As shown, it includes voltage source converter 3, shaft load optimization control loop 1, speed optimization control loop 2, and variable speed and pitch control loop 4. Voltage source converter 3 outputs the grid frequency f of the nth control cycle (n) Optimize the control loop 1 for the shafting load, and output the generator torque ΔT required for virtual synchronous operation f (n), generator power P g (n) and generator speed ω g (n) Output the generator torque command T under the maximum energy tracking mode to the speed optimization control loop 2 and the variable speed and pitch control loop 4 gmd (n) Give the speed optimization control loop 2, and the speed optimization control loop 2 outputs the speed optimization control output generator torque command T of the nth control cycle grd (n) to the adder, and output the ge...
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The invention discloses a voltage source wind turbine control method and system considering load and speed constraints, including a voltage source converter, shaft load optimization control loop, speed optimization control loop, and variable speed and pitch control. , the voltage source converter outputs f to the shafting load optimization control loop, and outputs ΔT f ,P g and ω g Optimize the control loop for speed, and control the output of variable speed and pitch T gmd Give the speed optimization control loop, the speed optimization control loop output T grd to the adder and output ω at the same time g Optimize the control loop for the shafting load and the variable speed and pitch control loop, and the output of the shafting load optimizing control loop is T Bd to the adder, the adder outputs T gd to a voltage source converter. The invention solves the problem of active power cooperation between the main control system of the voltage source wind turbine and the converter, avoids overspeed or underspeed faults; and reduces the transmission chain shaft of the voltage source wind turbine in the grid frequency disturbance condition Department of load impact.
Description
technical field [0001] The invention relates to the technical field of control of a wind turbine main control system, in particular to a control method and system for a voltage source wind turbine considering load and speed constraints. Background technique [0002] my country's wind power has developed rapidly, and its installed capacity has ranked first in the world for nine consecutive years, making it the third largest energy source in my country. With the rapid increase of installed capacity of wind power in my country, the proportion of installed capacity of wind power in the total installed capacity of electric power is also increasing, and the installed capacity of wind power in some power grids exceeds more than 30% of the total capacity. [0003] The current wind turbines are all current source-type operating characteristics, and have poor overload capacity, and do not actively participate in grid regulation, resulting in severe challenges for the safe and stable o...
Claims
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IPC IPC(8): F03D7/00F03D17/00H02J3/38H02J3/48H02J3/24
CPCF03D7/00F05B2270/101F05B2270/1011F05B2270/328F05B2270/331F05B2270/337F03D17/00H02J3/24H02J3/48Y02E10/72Y02E10/76
Inventor 应有杨靖洪敏孙勇许国东史晓鸣
Owner ZHEJIANG WINDEY