Static liquid energy storage hydraulic transmission type wind power generation set and control method

A wind turbine and hydraulic transmission technology, which is applied in the control of wind turbines, wind turbine combinations, wind turbines, etc., can solve the problems of complex, unstable power generation, unstable equipment structure, etc., and achieve efficient use, easy installation and Maintenance, the effect of reducing the weight of the cabin

Active Publication Date: 2017-06-20
LANZHOU UNIVERSITY OF TECHNOLOGY
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AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of unstable power generation caused by unstable wind speed and complicated equipment structure when using gear box structure in the actual operation process of existing wind turbines, the present invention proposes a hydrostatic energy storage hydraulic Transmission type wind turbine

Method used

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  • Static liquid energy storage hydraulic transmission type wind power generation set and control method
  • Static liquid energy storage hydraulic transmission type wind power generation set and control method
  • Static liquid energy storage hydraulic transmission type wind power generation set and control method

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Embodiment Construction

[0035] The technical solutions in the present invention will be described in detail below in conjunction with the accompanying drawings.

[0036] combine figure 1 As shown, the hydrostatic energy storage type hydraulic transmission type wind turbine includes a main circulation system 1 , a ground oil supply system 2 , an energy storage system 3 , a main oil tank 4 , a first cut-off valve 5 , a wind wheel 6 and a generator 7 .

[0037] The main circulation system 1 is a closed hydraulic system, including a hydraulic pump 101 , a variable displacement motor 102 , a high pressure oil circuit 103 , a low pressure oil circuit 104 , a first relief valve 105 , a first check valve 106 and a second stop valve 107 . The high pressure oil circuit 103 is located between the oil outlet of the hydraulic pump 101 and the oil inlet of the variable displacement motor 102 , and the low pressure oil circuit 104 is located between the oil outlet of the variable displacement motor 102 and the oil ...

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Abstract

The invention belongs to the technical field of wind power generation control and discloses a static liquid energy storage hydraulic transmission type wind power generation set in order to solve the problems that in the actual operation process, existing wind power generation sets are unstable in power generation power due to unstable wind speed and are complicated in equipment structure during speed changing through a gear box structure. The wind power generation set comprises a main circulating system, a ground oil supplementing system, an energy storage system, a main oil tank, a first stop valve, a wind wheel and a generator, wherein the main circulating system comprises a hydraulic pump connected with the wind wheel, and a variable motor connected with the generator. According to the static liquid energy storage hydraulic transmission type wind power generation set, power fluctuation caused by wind speed change can be restrained; and in addition, the swing angle of the variable motor is adjusted according to the rotating speed of the wind wheel, thus, the output rotating speed of the variable motor is controlled, the rotating speed of the generator is stabilized, tends to the power frequency rotating speed and reaches the deviation range required by the grid-connected frequency, and grid-connected power generation is achieved more easily.

Description

technical field [0001] The invention belongs to the technical field of wind power generation control, and in particular relates to a hydrostatic energy storage type hydraulic transmission type wind power generating set and a control method. Background technique [0002] In recent years, the world's wind power industry has developed rapidly and has gradually played an increasingly important role in alleviating energy and environmental crises. At present, there are mainly two types of wind turbines in actual operation: speed-up gearbox-doubly-fed generator system and direct drive-converter system. [0003] Speed-up gearbox—double-fed generator system, by adjusting the amplitude, frequency and phase sequence of the excitation current of the double-fed generator, to ensure the constant frequency and constant voltage of the output electric power. At the same time, the vector conversion control technology is adopted to adjust the speed of the wind wheel by adjusting the active po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03D9/25F03D15/00F03D9/10F03D7/00
CPCF03D7/00F05B2260/406F05B2260/42Y02E10/72Y02P80/10Y02E70/30
Inventor 魏列江刘增光赵宇阳李仁年杨国来杨瑞王刚
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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