Low-voltage ride-through testing system of wind generating set

Abstract

The invention provides a low-voltage ride-through testing system of a wind generating set. The testing system comprises a voltage dropping system, an on-site measuring system, a remote monitoring system and an on-site controlling system, wherein the on-site measuring system is in bidirectional connection with the remote monitoring system; the remote monitoring system is in bidirectional connection with the on-site controlling system; the on-site controlling system is in bidirectional connection with the voltage dropping system; the voltage dropping system is in one-way connection with the on-site measuring system; and the on-site measuring system is in bidirectional connection with the on-site controlling system. The low-voltage ride-through testing system of the wind generating set, disclosed by the invention, is in accordance with criterion IEC61400-21, can realize voltage drop of different degrees and various types and can satisfy requirements of wind generating sets in all countries on low-voltage ride-through testing. The low-voltage ride-through testing system is a movable detecting system which is adaptable to performing the low-voltage ride-through characteristic testing on all wind generating sets which have been operated in the wind power field, and has high safety as well as high stability.

Description

technical field [0001] The invention relates to a test system, in particular to a low-voltage ride-through test system for wind turbines. Background technique [0002] China's wind power industry is developing rapidly. With the continuous expansion of wind power scale, the mutual influence between wind power and power grid is becoming more and more obvious. When an instantaneous fault occurs in the power grid, if the wind turbines do not have the low voltage ride-through function, all wind turbines in the regional grid will be out of operation, which will destroy the active power balance of the grid, and even cause grid failure in a grid with a large proportion of wind power installed capacity. collapse. A large-scale wind farm composed of wind turbines with low-voltage ride-through capability can continue to provide power support when an instantaneous short-circuit fault occurs in the power grid. This will be of great significance to the entire power grid in China, especia...

AI Technical Summary

Problems solved by technology

Due to the large market demand for wind turbines, most of the wind turbines that leave the factory do not have low-voltage ride-through functions, and most of the wind turbines that claim to have low-voltage ride-through functions have not passed on-site inspections.

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