Testing platform and method for wind power converter chopper device

Abstract

The invention discloses a testing platform and method for a wind power converter chopper device. The testing platform comprises a power grid access interface, a first isolation transformer, a second isolation transformer, a double-feed converter and a machine side breaker, wherein the power grid access interface is externally connected with a power grid, and is connected with one ends of the first isolation transformer and the second isolation transformer; the other end of the first isolation transformer is connected with the line side of the double-feed converter; the other end of the second isolation transformer is connected with the machine side of the double-feed converter through the machine side breaker; during a test, the power grid access interface, the first isolation transformer, the second isolation transformer and the machine side breaker form a power test loop which is connected with the chopper device to be tested through the double-feed converter. According to the invention, the low voltage ride-through failure is simulated through software to test the electrical performance of the chopper device, so that the test is flexible, convenient, economical and practical, and has good application prospect.

Description

technical field [0001] The invention belongs to the technical field of high-power electric equipment testing, and in particular relates to a testing platform and method for a chopper device of a wind power converter. Background technique [0002] With the rapid development of new energy sources, the proportion of wind power energy in the entire power grid is increasing. Therefore, the power grid has put forward higher requirements for the connection of wind turbines, and wind turbines are required to have low voltage ride through capability (LVRT), namely After a failure of the connected grid causes the voltage of the wind farm to drop, the wind turbines can ensure uninterrupted grid-connected operation through low-voltage ride-through, thereby avoiding the cut-out of the wind farm from seriously affecting the stability of the grid system. [0003] When a low-voltage ride-through fault occurs in the power grid, the grid voltage at the point where the wind turbine is connecte...

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Problems solved by technology

[0005] The technical problem solved by the present invention is that in the prior art, the testing of the chopper device requires a huge investment in testing equipment, inconvenient testing, and a costly and laborious problem.

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