Controller of converter of dual-fed wind power generator

Abstract

The invention relates to a controller of a converter of a dual-fed wind power generator, which is formed by connecting a touch display screen, a PLC module, a data acquisition and control module and a network interface module, wherein the touch display screen is connected with the PLC module, the PLC module is connected with one end of the network interface module, the other end of the network interface module is connected with a control and pitch control system of a wind turbine, the PLC module is further connected with the data acquisition and control module, and the data acquisition and control module is simultaneously connected with a rotor side power module and a network side power module. The controller adopts the modular design and can realize the double closed-loop control of a power outer loop and a current inner loop through acquisition, analysis and treatment of various analog signals, digital quantity signals and rotation speed signals, and simultaneously realize the functions of centralized acquisition of data, fault prediction, diagnosis and the like, and has the characteristics of strong anti-interference ability, abundant network interfaces, fast measurement speed, high control precision, friendly man-machine interface and the like.

Description

technical field [0001] The invention belongs to the field of wind power generation, in particular to a converter device controller of a doubly-fed wind power generator. Background technique [0002] At present, the megawatt-scale variable-speed variable-pitch doubly-fed grid-connected wind turbine represents the mainstream direction of the development of domestic wind turbines, and the doubly-fed converter is one of the core components of the megawatt-scale doubly-fed wind turbine. It is an important part to realize the constant voltage and constant frequency grid-connected power generation operation of the doubly-fed asynchronous wind turbine under the condition of large-scale wind speed changes. The controllers of existing high-power double-fed converters mostly use dual-processor or dual-DSP architecture, and the processors are connected through dual-port RAM or serial communication. The driver board composed of discrete components plus IGBT module, the control system an...

AI Technical Summary

Problems solved by technology

This structure causes the controller to have the following deficiencies: 1. The dual-CPU structure causes complex cooperative control and is prone to failure; 2. The wiring of each control board is complicated and the ability to resist electromagnetic interference is poor; 3. The control board or driver composed of discrete components The board uses many devices, parameter matching is difficult, and it is prone to failure; 4. Too many discrete devices cause high production, debugging, and maintenance costs; 5. Lack of network interface makes it difficult to realize remote data exchange and fault diagnosis, and it is difficult to adapt to different machine manufacturers 6. Without a large-capacity storage medium, the measurement data cannot be stored for a long time, and it is difficult to realize fault analysis and prediction

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