Control system of wind turbines

Abstract

A wind-electric set control system includes the center controller PLC, the intermediate relay panel, the soft merge network control panel, the display operation panel and the connector. The center controller PLC mainly includes CPU module 315-2DP, digital input module DI, digital output module D0, high-speed counter module FM350-2, analog input module AI, communication module CP340; the intermediate relay panel comprises a number of DC coil relays. The intermediate relay panel and the soft merge network control plane respectively connect with the input and output modules of the center controller PLC, and connect with the controlled object through connector. The system uses the intermediate relay panel to isolate the input/output signal, which improves the resist interference ability of the system. The soft merge network control uses current-limit soft-cut-in control strategy, to make the merge network processing more stable. This invention limits the merge network number of the small motor in one hour, which cleverly solves the small stop problem of the wind-electric set, and it uses PROFIBUS field bus technology to communicate with the central monitor computer.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a control system of a fixed-pitch stall-type wind turbine. Background technique [0002] The fixed-pitch stall-type wind turbine is currently the most widely used model in the wind power market. Generally speaking, the wind turbine monitors the status of the unit itself, the status of the power grid, and the surrounding environment such as temperature, wind speed, wind direction, etc., and issues corresponding control commands after comprehensive judgment to realize the control and protection of the wind turbine. The current control of stall-type wind turbines often has the following deficiencies: [0003] First of all, wind turbines often work in harsh outdoor environments, and lightning, electromagnetic interference, etc. will cause harm to wind turbines, especially the electronic control system. At present, the controllers of wind turbines have deficiencies in anti-elect...

AI Technical Summary

Problems solved by technology

Existing controllers, such as wind turbine controllers using single-chip microcomputers or industrial computers, control functions have been limited to one control board or concentrated on the expansion slot of the industrial computer. When the number of control points increases, it is not conducive to the expansion of functions, making the controller The time and cost of upgrading are greatly increased; at the same time, it is not conducive to fault finding and maintenance when the controller fails

[0005] Third, large-capacity wind turbines, especially asynchronous induction generators, will cause a greater impact on the unit when they are directly connected to the grid

Existing wind turbine controllers generally use the traditional RS485 serial communication method or telephone dialing method, which has slow communication speed and high bit error rate

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