Wind turbine pitch control method combining nonlinear feedforward and fuzzy pid
A technology of wind power generators and control methods, which is applied to the control of wind power generators, wind power generators, and wind power generation. Rod and control accuracy, reduce the adjustment time, reduce the effect of mechanical vibration
Active Publication Date: 2017-09-19
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology
Due to the inertia and delay of the pitch control system, the dynamic adjustment time of the control process is long and the overshoot is large
In addition, the wind turbine will inevitably cause a load impact on the wind turbine during the pitch change process. For the pitch control of large-scale variable-speed and variable-pitch wind turbines, how to improve the power quality while reducing the key parts of the wind turbine? The loading of the
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[0032] A non-limiting embodiment is given below in conjunction with the accompanying drawings to further illustrate the present invention.
[0033] refer to figure 1 as shown in figure 1 Shown, concrete steps of the present invention are:
[0034] Step 1: measure the generator power P of the wind turbine;
[0035] Step 2: Compare generator power P with rated power P 0 Perform difference calculation to obtain power deviation ΔP;
[0036] Step 3: MAPSO fuzzy PID control, that is, the MAPSO fuzzy PID controller calculates the pitch angle β of the expected output of the pitch control according to the power deviation ΔP 1 ;
[0037] The input variables of the fuzzy PID controller are the error signal and the rate of change of the error signal, and the output variables are the three gains of the PID controller. The multi-input and multi-output fuzzy system is decomposed into a multi-input and single-output fuzzy control system for consideration, and the fuzzy control rule is e...
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The invention discloses a nonlinear feed-forward and fuzzy PID combined variable pitch control method for a wind generating set. The method comprises based on an active power deviation feed-forward control strategy, using active power P and rated power P0 of a generator to obtain the power deviation delta P when a generator unit operates above the rated wind speed; giving variable pitch control expected output pitch angle beta1 through an MAPSO fuzzy PID controller; obtaining a variable pitch control expected feed-forward pitch angle beta2 through a nonlinear feed-forward controller; adding the pitch angle beta1 obtained by the MAPSO fuzzy PID controller to the feed-forward pitch angle beta2 to obtain a pitch angle set value beta. By means of the method, the system adjusting time is reduced, the stability and the reliability of the system are increased, and compared with traditional controllers, apparent advantages are provided.
Description
technical field [0001] The invention relates to the technical field of wind power generation, in particular to a pitch control method for a wind power generating set combining nonlinear feedforward and multi-agent particle swarm optimization (MAPSO) fuzzy PID control. Background technique [0002] Modern wind power generation emerged in the 1970s. After years of development, from the initial fixed pitch to the current variable pitch, from constant speed and constant frequency to today's variable speed and constant frequency, the wind power generation technology has been relatively mature, and wind power has basically been realized. The ultimate goal of the generator set from being able to supply power to the grid to ideally supplying power to the grid. [0003] In recent years, variable pitch units have gradually become the mainstream models of wind power generation. In order to ensure that large and medium-sized wind turbines operate safely above the rated wind speed and c...
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IPC IPC(8): F03D7/00
CPCY02E10/72
Inventor 唐贤伦王福龙胡向东蒋畅江张毅张莉姜吉杰
Owner CHONGQING UNIV OF POSTS & TELECOMM