Wind power generation system
Technical field
The utility model relates to wind electricity generating system, relates in particular to a kind of wind power generation system.
Background technology
Traditional constant-speed and constant-frequency wind-driven generator is owing to invariablenes turning speed, and blade has departed from design efficiency in the time of majority, and induction generator efficient under the operating mode of low-power output also will significantly decrease, and these reasons have caused falling of machine system efficient.In order to remedy these defectives, wind-driven generator usually adopts variable speed design, for example adopts double-fed generator or permanent magnet generator etc., though such design has promoted system effectiveness, also makes the cost of generator and current transformer that significantly lifting is arranged.
Summary of the invention
For addressing the above problem, the utility model is intended to use lower cost to promote the system effectiveness of complete machine.The efficient of induction generator when low-power is exported is very low; But surpass 92% high-power section efficient; If use the form of many generators; When different power outputs, insert the generator of varying number, the generator of each work is all operated under the high efficiency state, will make system effectiveness obtain to promote.
For achieving the above object; The technical scheme that the utility model adopts is: wind power generation system; Comprise a plurality of generators, master control set, gear box, said gear box is established high speed shaft, and generator is connected with master control set; It is characterized in that: also comprise shaft coupling, said shaft coupling is interconnected with a plurality of generators and be connected with master control set, high speed shaft.
First preferred version of the utility model does, establishes current sensor between described generator and master control set, and master control set is gathered the dynamo current signal through current sensor.
Second preferred version of the utility model does, described generator goes out shaft generator for two.
The technical advantage of the utility model is: the present invention will go out shaft generator and be connected to the gearbox high-speed axle with shaft coupling after interconnected by two (or many) are two; Output is equipped with current sensor in system, and control system is according to the generator of different output current (or power) switching varying numbers.The quantity of the generator of under the different wind condition, devoting oneself to work and rated power and present output power have clear and definite corresponding relation, are that each generator all is operated in the high efficiency state.This kind mode has reached low-cost and has obtained high efficiency energy conservation effect.
Below in conjunction with accompanying drawing and specific embodiment the utility model is further specified.
Description of drawings
Fig. 1 is a present embodiment construction module sketch map.
Embodiment
With reference to figure 1; Wind power generation system; Comprise all structures of existing wind generator systems such as a plurality of generators, master control set, gear box, said gear box is established high speed shaft, and generator is connected with master control set; Also comprise shaft coupling, said shaft coupling is interconnected with a plurality of generators and be connected with master control set, high speed shaft.Establish current sensor between generator and master control set, master control set is gathered the dynamo current signal through current sensor.Generator goes out shaft generator for two.
Master control set is through the individual dynamo current signal of current sensor senses N (N is the integer greater than 1).Judge shaft coupling switching generator number on high speed shaft according to the size of current signal.
Though the utility model further specifies according to the foregoing description, the invention thought of the utility model is not limited only to this.