Low-voltage ride through detection system and method of wind generating set

Abstract

The invention provides a low-voltage ride through detection system of a wind generating set. The low-voltage ride through detection system comprises a power grid simulation device, a dummy load, a voltage sag control unit and a detection unit; the power grid simulation device is used for simulating voltage of a power grid; the dummy load is used for simulating a load of the power grid; the power grid simulation device and the tested wind generating set supply electricity to the dummy load together; the voltage sag control unit is connected between the power grid simulation device and the tested wind generating set for making the output voltage of the power grid simulation device undergo voltage sag; and the detection unit is respectively connected with the power grid simulation device and the tested wind generating set for detecting the low-voltage ride through performance of the tested wind generating set. The invention further provides a low-voltage ride through detection method of the wind generating set. According to the low-voltage ride through detection system of the wind generating set and the low-voltage ride through detection method of the wind generating set provided by the invention, the low-voltage ride through capability of a fan can be tested under the precondition that the power grid is not utilized.

Description

technical field [0001] The invention relates to wind power generation technology, in particular to a low-voltage ride-through detection system and method for a wind power generating set. Background technique [0002] With the continuous development of wind power technology, the installed capacity of wind turbines continues to increase, and the status of wind power in the power system is gradually increasing. At the same time, the power grid companies of various countries have successively put forward stricter technical requirements for the grid connection of wind turbines. This is because: when the installed capacity of wind power is small, the impact of wind farm operation on the stability of the power system can be ignored; However, with the increasing installed capacity of wind power and the proportion of wind power in the power system increasing year by year, the impact of wind farm operation on system stability cannot be ignored. Therefore, in order to maintain the sta...

AI Technical Summary

Problems solved by technology

Although this method can perform low-voltage ride-through testing, it must connect the low-voltage ride-through detection equipment in series between the power grid and the wind turbine, so it needs permission from the power grid company

In addition, even with the permission of the power grid company, since the hoisting of wind turbines is not synchronized with the construction of the grid in practical applications, if the grid construction is slow, it is necessary to wait until the completion of the grid construction before conducting low-voltage ride-through capability experiments on wind turbines , to determine whether the wind turbine meets the low voltage ride-through capability required for grid connection, thus prolonging the completion time of the wind power construction project and reducing work efficiency

Images