A control method for smoothing wind turbine power fluctuations

Abstract

The invention discloses a control method for stabilizing power fluctuation of a wind power generating set and belongs to the technical field of wind power generation. The control method comprises the following steps of: 1, setting a battery management mechanism of a vanadium ion redox battery energy storage system; 2, regulating active power of the wind power generating set by using a first-order Butterworth low-pass filter; 3, determining active power compensated or absorbed by the vanadium ion redox battery energy storage system; 4, controlling transducers in a wind power generator and a single battery; 5, performing stabilizing control on grid-connected power of the whole wind power generating set by using the independent vanadium ion redox battery energy storage system; and 6, establishing a power control model of the vanadium ion redox battery energy storage system. The control method for stabilizing the power fluctuation of the wind power generating set has the advantages that: the stability of a grid-connected wind power generating set is improved; the control method is easy to realize; the problem that a strongly coupled system is difficult to control is solved; the stability of the wind power generating set can be effectively improved after the system has a fault; and the power output of the wind power generating set can be stabilized under quick disturbance of wind, so that the impact of the power fluctuation on a power grid is reduced.

Description

technical field [0001] The invention belongs to the technical field of wind power generation, in particular to a control method for smoothing power fluctuations of wind turbines. Background technique [0002] The tight supply of electricity has become a bottleneck restricting the sustainable development of the national economy. In recent years, distributed power supply technology based on renewable energy such as wind energy and solar energy has become the focus of development in the energy field. However, due to the unstable and discontinuous intermittent characteristics of wind power generation, the large-scale wind power connection seriously affects the stable operation of the power grid. Moreover, at present, the method of directly adjusting the operating state of wind turbines or combining pitch and speed changes is often used. Control to smooth its output power, but the adjustment ability of this method is very limited, and it cannot guarantee the continuous and stable...

AI Technical Summary

Problems solved by technology

However, due to the unstable and discontinuous intermittent characteristics of wind power generation, the large-scale wind power connection seriously affects the stable operation of the power grid. Moreover, at present, the method of directly adjusting the operating state of wind turbines or combining pitch and speed changes is often used. control to smooth its output power, but the adjustment ability of this method is very limited, and it cannot guarantee the continuous and stable power generation and power supply

Images