Low-temperature idle running heating control system and method of wind generating set

Abstract

The invention discloses a low-temperature idle running heating control system and a method of a wind generating set. The system comprises a control system, an electric pump and a heating system. When the oil temperature of a gear box is below a certain value, a gear box lubricating system enters a low-temperature starting state, then the control system controls a propeller to change the pitch to a certain angle, gear box idle rotation is maintained so as to mix lubricating oil, the oil temperature of the gear box rises uniformly, and the control system does not start the heating system until the rotating speed of a high speed shaft is maintained at a set value. After the oil temperature of the gear box reaches the minimum machine starting oil temperature, the control system pre-starts the electric pump to a low-speed state, and monitors a load current of the electric pump; when the load current of the electric pump can not meet the starting condition of the gear box lubricating system, the wind generating set carries out idle rotation continuously and the gear box is kept heated. According to the system and the method, safe operation of the low-temperature starting process of the wind generating set can be guaranteed, the starting process on the low-temperature condition is accelerated, the labor intensity of workers is lowered, and the generated energy of the wind generating set is increased.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a heating control system and method applied to a wind power generating set under low temperature and no-load operation conditions. Background technique [0002] my country's wind resources are basically concentrated in the northern regions (Northeast, North China, and Northwest), and the seasonal distribution of wind resources is also very uneven, basically concentrated in autumn, winter and spring. The temperature in autumn and winter is cold, and the oil temperature of the gearbox is very low after the gearbox has been shut down for a long time, and the viscosity of the lubricating oil becomes larger. It is difficult to meet the starting conditions when restarting the fan. At the same time, the conventional starting fan is easy to cause damage to the components of the lubrication system, making it difficult to start the unit or lead to failure. At present, the low-temperat...

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Problems solved by technology

In prior art 1, it is only mentioned that when the oil temperature of the gearbox reaches 0°C, start the lubricating oil pump, but it cannot accurately judge whether the electric pump will be overloaded when starting at 0°C, and whether the motor can be started safely below 0°C, thereby shortening the start-up time

At the same time, the existing technology does not consider whether the fan can safely enter this state before the fan enters the low-temperature start-up

In prior art 1, it is mentioned that the fan starts to change pitch when the fan is low temperature, so that the fan is idling. However, if the fan still has a startup failure at this time, idling may cause serious problems to the fan. , there is a risk that the fan will not be able to stop. As for the existing technology 2, the oil temperature is also used to control the operation of the electric pump, which only considers the control of the fan electric pump when the fan is in standby (that is, when the power is not interrupted). Technical problem of prior art 1

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