Control method for guaranteeing safe operation of wind turbine

Abstract

The invention relates to a control method for guaranteeing the safe operation of a wind turbine. The method comprises the following steps of: (1) generating pulse signals by a master control system in real time and sending the signals to a pulse detector; (2) detecting the pulse signals sent by the master control system by the pulse detector in real time, and executing a step (3) when a detection result of the pulse detector has an abnormality, or else circularly executing the step (1) and the step (2); (3) outputting contact signals to a safety system by the pulse detector; (4) disconnecting a safety chain after the safety system detects the contact signals and sending a control command to a variable pitch system; and (5) controlling the wind turbine to be shut down by the variable pitch system after receiving the control command. The method has reasonable design, judges whether the master control system has a failure or not through detecting the pulse signals of the master control system in real time and can control the wind turbine to be safely shut down in real time after the failure occurs, thereby effectively protecting the wind turbine equipment and guaranteeing the safety operation of the wind turbine.

Description

technical field [0001] The invention belongs to the field of wind power generation, in particular to a control method for ensuring the safe operation of a wind turbine. Background technique [0002] In response to the current energy crisis and increasingly serious environmental pollution problems, wind power, a renewable energy source, has developed rapidly around the world, and megawatt-level wind turbines have also been more and more widely used. The wind turbine is a set of fully automated equipment with automatic adjustment and unattended operation. The main control system in the wind turbine is responsible for the speed control, pitch control, power control, automatic start / stop, unit status detection, event recording, etc. of the wind turbine. Waiting for work. If the main control system as the core of the wind turbine fails or becomes paralyzed, the wind turbine will lose control and its operation safety will be seriously threatened. At present, wind turbines usuall...

AI Technical Summary

Problems solved by technology

At present, wind turbines usually protect the wind turbines by installing a safety system between the main control system and the pitch system. The problem is that the safety system only performs safety protection functions under the control of the main control system. , if the main control system fails or crashes, the safety system cannot automatically start the protection function, and within a period of time between the failure of the main control system and the triggering of the safety system conditions, all the equipment in the wind turbine will lose control, making the wind turbine speed It has been rising, resulting in problems such as insufficient lubricating oil in the gearbox, high bearing temperature, and lack of cooling air for the generator. These problems will cause great damage to the unit. Overspeed, etc.) cannot trigger the safety system action, and the wind turbine will have a devastating disaster

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