Plasma control device and method for blades of wind driven generator

A wind turbine and plasma technology, which is used in the control of wind turbines, wind turbine components, wind turbines, etc., to achieve the effects of fast response, energy enhancement, and flow separation inhibition

Active Publication Date: 2013-11-27
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention can improve the wind energy u

Method used

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  • Plasma control device and method for blades of wind driven generator
  • Plasma control device and method for blades of wind driven generator
  • Plasma control device and method for blades of wind driven generator

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0056] Example 1: Controlling the surface flow separation of wind turbine blades

[0057] Step 1. Install the plasma exciter system

[0058] The length of the wind turbine blade selected according to the embodiment is 39.1m, which is divided into 6 control areas in the radial direction. The lengths of the 6 control areas from the root of the blade to the tip of the blade are 5m, 5m, 7m, 7m, 7m, 8.1 m; each control area includes 6 control sub-regions including front edge 1, front upper surface 2, rear upper surface 3, rear edge upper surface 4, rear edge lower surface 5, and lower surface 6; the first one The wind turbine blades in the control area do not need to apply flow control, only plasma exciters for anti / deicing control need to be installed; 20 plasma exciters are installed uniformly in the control area 1; control areas 2, 3, 4, A plasma exciter is arranged in the leading edge control sub-region 1 of 5 and 6; in the upper surface control sub-region 2 of the front upper surf...

Example Embodiment

[0066] Example 2: Anti-icing on the surface of wind turbine blades

[0067] The area where the wind turbine is located has just experienced a rain, which causes the air humidity to increase rapidly, and the temperature drops in the morning and evening, which makes the surface of the wind turbine blades freeze, and the plasma control system needs to be turned on for anti-icing treatment.

[0068] Step 1. Install the plasma exciter system

[0069] The arrangement of the plasma exciter system is the same as step one of the first embodiment.

[0070] Step 2: Anti-icing work of plasma exciter system

[0071] The microprocessor 9 in the control system 11 judges that the surface of the wind turbine blade reaches the icing condition according to the temperature sensor and humidity sensor measurement, and determines that all the plasma exciters in the 6 control areas on the surface of the wind turbine blade are all turned on for anti-icing and start Excitation power supply; under high voltage e...

Example Embodiment

[0072] Example 3: Deicing the surface of wind turbine blades

[0073] The area where the wind turbine is located has experienced continuous low-temperature rainfall for a long period of time, and ice has appeared on the surface of the wind turbine blades. The plasma control system needs to be turned on for deicing.

[0074] Step 1. Install the plasma exciter system

[0075] The arrangement of the plasma exciter system is the same as the step one in the first embodiment.

[0076] Step 2: Deicing of the plasma exciter system

[0077] The icing sensor in the plasma control system 11 measures that the icing on the surface of the wind turbine blade reaches 1mm and is increasing at a speed of 1mm / h. The microprocessor 9 of the control system 11 determines 6 control areas on the surface of the wind turbine blade All the plasma exciters in the front edge 1, the front upper surface 2 control sub-region can be excited by a high-voltage pulse power source, the rear upper surface 3, the rear upper...

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Abstract

Disclosed are a plasma control device and method for blades of a wind driven generator. A plasma exciter is composed of an exposed electrode, an implantation electrode and a medium blocking layer, wherein the exposed electrode and the implantation electrode are pasted to the upper surface and the lower surface of the medium blocking layer respectively; the exposed electrode is exposed in air and connected with the high pressure end of an excitation power supply (7); the surface of the implantation electrode is wrapped by insulation materials, and the implantation electrode is connected with a ground electrode. The plasma exciter is installed on the surfaces of the blades of the wind driven generator smoothly. According to the environment where the wind driven generator is located and freezing parameters of the surfaces of the blades, a control system (11) adjusts the output waveform, potential, frequency and duty ratio of the excitation power supply (7), and controls the excitation power supply to be opened and closed. The plasma exciter produces air discharge under the action of the high voltage of the excitation power supply (7), produced plasma has the impact function, the acceleration function and the heating function on ambient air, flow separation on the surfaces of the blades of the wind driven generator is restrained, and icing is prevented and removed.

Description

technical field [0001] The invention relates to a device and method for controlling the flow separation of blades of a wind power generator by using plasma to improve the wind energy utilization efficiency of the wind power generator. Background technique [0002] As a clean, pollution-free renewable energy, wind energy has attracted more and more attention. A wind turbine is a power generating device composed of blades, transmission system, generator and electrical system. Among them, the blade is a part of the wind generator to capture wind energy, which directly converts wind energy into mechanical energy and transmits it to the generator for power generation, and is a key component of the wind generator. Blades have a direct impact on the utilization of wind energy. Blades with good aerodynamic performance can improve the power generation efficiency of the entire unit. However, the Reynolds number of large wind turbine blades is generally low, especially in the area whe...

Claims

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Application Information

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IPC IPC(8): F03D11/00F03D7/00
CPCY02E10/723Y02E10/722Y02E10/72
Inventor 邵涛车学科严萍聂万胜
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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