Low voltage ride-through monitoring system for doubly-fed wind generator

Abstract

The invention relates to a low voltage ride-through monitoring system for a doubly-fed wind generator. The low voltage ride-through monitoring system for the doubly-fed wind generator is characterized by comprising a data acquisition adaptation system, a trigger detection system, a state monitoring system, a data storage system and a data analysis system, wherein the data acquisition adaptation system acquires voltage and current state data during the operation of the doubly-fed wind generator in real time and transmits the state data to the trigger detection system and the state monitoring system; the trigger detection system monitors the voltage and the current of a power grid and transmits a low voltage ride-through triggering signal to the state monitoring system and the data storage system when the voltage drops; the state monitoring system performs vibration detection on a driving chain of the doubly-fed wind generator and on a tower frame according to the received state data and the low voltage ride-through triggering signal and transmits the monitoring result to the data storage system; and the data storage system stores the received data and transmits the data to the data analysis system to perform real-time analysis. The low voltage ride-through monitoring system for the doubly-fed wind generator can realize functions of automatic monitoring and real-time recording and can be widely applied in wind power industries.

Description

Technical field [0001] The invention relates to a monitoring system for a wind turbine, in particular to a low voltage ride through monitoring system for a doubly-fed wind turbine. Background technique [0002] With the rapid development of my country's new energy industry, the installed capacity of wind power has increased rapidly, and the impact of wind power on the power system is increasing. In order to maintain the stable operation of the power system, power grids in various countries have put forward more and more stringent requirements for the grid access conditions of wind farms and wind turbines, especially the low voltage ride-through (low voltage ride-through, LVRT) capabilities. The doubly-fed induct ion generator (DFIG) has become the mainstream model of megawatt wind turbines due to its active and reactive power decoupling control and small converter capacity. Its operating characteristics and control Quality has a great influence on the grid. my country's State ...

AI Technical Summary

Problems solved by technology

Since the doubly-fed induction grid-connected wind turbines put forward new requirements for the monitoring system of the entire wind turbine during the low-voltage ride-through test, test and evaluation process, but the existing monitoring system cannot meet the requirements of the wind power during the low-voltage ride-through process. Requirements for condition monitoring and data recording of generator sets

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