Digital control device and method for oil temperature of gearbox of wind driven generator

Abstract

The invention discloses a digital control device and method for the oil temperature of a gearbox of a wind driven generator. The device comprises a temperature measuring module, a digital quantity processor module, a driving module and a power supply. The oil temperature value of the gearbox of the wind driven generator is measured through the temperature measuring module and provided for the digital quantity processor module, the digital quantity processor module controls on-off of three relays in the driving module according to the oil temperature measuring value, and then three electromagnetic valves at an oil inlet of the gearbox of the wind driven generator are controlled. By judging whether oil in the gearbox of the wind driven generator passes through a cooler or not, graded digitalcontrol that the oil temperature of the gearbox of the wind driven generator cannot exceed the rated working range is achieved, a mechanical temperature control valve with the high failure rate is replaced, and safe and stable operation of the wind driven generator is guaranteed; and frequent replacement of the temperature control valve is avoided, the production cost of a wind power plant is reduced, the influence of the oil temperature of the gearbox of the wind driven generator on a wind driven generator body is reduced, and reliable operation of the wind driven generator is guaranteed from the perspective of the oil temperature of the gearbox.

Description

technical field [0001] The invention belongs to the technical field of gear box oil control of wind power generators, and in particular relates to a digital control device and method for oil temperature of a gear box of wind power generators. Background technique [0002] The global climate is gradually changing, and countries are facing contradictions between energy supply, economic development and the environment. In order to reduce and delay the irreversible impact of primary energy on the environment, countries vigorously develop new energy, formulate energy development plans and strategies, and carbon emission. Wind power accounts for the largest proportion of all kinds of new energy, and it is also the first choice for the construction of new energy power generation projects. As an essential part of the wind turbine, the gear box operates under high oil temperature, which not only affects the life of the gear, but poor lubrication will affect the life of the main engi...

AI Technical Summary

Problems solved by technology

As an essential part of the wind turbine, the gear box operates under high oil temperature, which not only affects the life of the gear, but poor lubrication will affect the life of the main engine of the wind turbine, and will cause the wind turbine to alarm and gradually limit the output. If the oil temperature is still maintained High-level operation not only affects wind power generation, but also faces the production risk of shutdown and off-grid, which is a major problem facing wind power plants at present

According to the previous investigation and investigation, the limited output of wind turbines in my country due to the high oil temperature of the gearbox is relatively common at present. The main reason for this phenomenon is that the current wind turbines all use mechanical temperature control valves, that is, the principle of thermal expansion and cold contraction is used. Control whether the gear box oil passes through the oil cooling system, the mechanical temperature control valve continues to work in the state of thermal expansion and contraction, coupled with the influence of oil quality, the mechanical temperature control valve fails and the fan stops

Through on-site statistical analysis, the replacement of mechanical temperature control valves in each wind farm is large, and the price is high, which has a large direct and indirect impact on the wind farm; at the same time, there is no digital control device for the oil temperature of the wind turbine gearbox. and method applications and literature

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