Doubly-fed wind turbine sub synchronous resonance hardware in-loop test system and method

Abstract

The invention discloses a doubly-fed wind turbine sub synchronous resonance hardware in-loop test system and a doubly-fed wind turbine sub synchronous resonance hardware in-loop test system method. The system comprises a power electronics real-time simulation platform and a to-be-tested doubly-fed wind turbine controller; a real-time digital simulation model comprising a power grid, wind power plant equipment and doubly-fed wind turbine equipment is built on the power electronics real-time simulation platform; after being subjected to real-time transformation, the real-time digital simulation model is downloaded to the simulation machine of the power electronics real-time simulation platform; and the to-be-tested doubly-fed wind turbine controller is connected with the real-time digital simulation model through the input and output interface of the simulation machine. With the doubly-fed wind turbine sub synchronous resonance hardware in-loop test system and the doubly-fed wind turbine sub synchronous resonance hardware in-loop test system method of the invention adopted, a doubly-fed wind turbine sub synchronous resonance hardware in-loop test can be realized flexibly and conveniently, and test results can be close to engineering practice, and test results is more accurate.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a sub-synchronous resonance hardware-in-the-loop test system and method of a doubly-fed fan. Background technique [0002] Wind power has become an important part of China's energy strategy. However, since a considerable part of my country's wind power is concentrated in Xinjiang, Gansu, Inner Mongolia and other northwest regions, while my country's energy load centers are concentrated in the southeast coastal areas, it is necessary to adopt a high-voltage, large-capacity transmission mode to achieve "West Telephone East". Considering the construction cost of new transmission lines and the occupation of transmission corridors, etc., it is of great significance to improve the transmission capacity of existing AC lines. Adding series compensation capacitors in the transmission line can reduce the line reactance and improve the static stability limit and transmission capaci...

AI Technical Summary

Problems solved by technology

[0004] At present, the analysis of subsynchronous resonance of wind power mainly adopts the methods of eigenvalue calculation and time-domain simulation. The eigenvalue calculation requires detailed parameters of the doubly-fed unit, which is often difficult to obtain; time-domain simulation usually uses the classic fan model, and does not consider different manufacturers. Different performances of fans at sub-synchronous resonance, and there are differences between time-domain simulation and actual conditions, and the consistency with engineering reality needs to be checked

Therefore, there is still a lack of a sub-synchronous resonance test method and system that is close to engineering reality, is practical, and can consider the differences in products from different manufacturers.

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