A design method of power system stabilizer suitable for doubly-fed wind turbines

Abstract

The invention discloses a power system stabilizer design method suitable for a double-fed draught fan, and belongs to the technical field of the automatic control of new energy power systems. According to the technical scheme, firstly, nodes and lines of the whole network are numbered uniformly to build a system parameter list; secondly, a double-fed draught fan augmented correlation measuring module is built; thirdly, power system stabilizers under all selected operating points are designed; finally, the module switching weight value is computed and the output of a controller is obtained. The output control signals of the system stabilizers are superimposed on traditional system control signals, the traditional operation habits can be kept, and the advantages of being simple to achieve, low in cost are achieved. By the adoption of the power system stabilizers designed according to the method, the disturbance resisting ability and the fault ride-through ability of the wind farm can be improved, the stability of the power grid is improved, and the wind power using ability of the power grid is improved.

Description

technical field [0001] The invention belongs to the technical field of automatic control of new energy power systems, and in particular relates to a design method of a power system stabilizer suitable for double-fed wind turbines. Background technique [0002] In recent years, the new energy power system represented by wind power has become the fastest growing energy source. As more and more large-scale wind farms are connected to the grid, the installed capacity of wind power has reached the point where it cannot be ignored. Theory and practice show that the operating state of wind power, especially the transient state after a power system failure, is directly related to the safe and stable operation of the power grid. Due to its low manufacturing cost and flexible control methods, doubly-fed wind turbines have already dominated the wind farms connected to the grid. At present, the common control method on the rotor side of the doubly-fed fan is the cascade PID active and...

AI Technical Summary

Problems solved by technology

At present, the common control method on the rotor side of the doubly-fed fan is the cascade PID active and reactive power decoupling control, but the parameters of the PID controller are set according to the approximate linear model under a certain working condition. Under the condition, its dynamic control effect is difficult to guarantee

[0003] At present, the existing power system stabilizers that can be applied to double-fed wind turbines all follow the design method of previous synchronous machines, without considering the characteristics of double-fed wind turbines

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