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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 utilization efficiency of the wind generator

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

Embodiment 1

[0056] Example 1: Controlling Flow Separation on the Surface of Wind Turbine Blades

[0057] Step 1. Install the plasma actuator system

[0058] According to the embodiment, the length of the blade of the wind power generator selected is 39.1m, which is divided into 6 control areas in the radial direction, and 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-areas including leading edge 1, front upper surface 2, rear upper surface 3, trailing edge upper surface 4, trailing edge lower surface 5, and lower surface 6; the first The wind turbine blades in the control area do not need to apply flow control, only need to install plasma actuators for anti / deicing control; 20 plasma actuators are evenly installed in control area 1; control areas 2, 3, 4, 1 plasma actuator is arranged in the leading edge control sub-area 1 of 5 and 6; the plasma excitation is arranged at an int...

Embodiment 2

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

[0067] The area where the wind turbine is located has just experienced a rainfall, resulting in a rapid increase in air humidity, while the temperature drops in the morning and evening, causing ice to form on the surface of the wind turbine blades. It is necessary to turn on the plasma control system for anti-icing treatment.

[0068] Step 1. Install the plasma actuator system

[0069] The arrangement of the plasma actuator system is the same as Step 1 of Embodiment 1.

[0070] Step 2. Plasma actuator system anti-icing work

[0071] The microprocessor 9 in the control system 11 determines that the surface of the wind turbine blade reaches the freezing condition according to the measurement of the temperature sensor and the humidity sensor, and determines that all the plasma actuators in the 6 control areas on the surface of the wind turbine blade are all turned on for anti-icing, and start Excitation pow...

Embodiment 3

[0072] Embodiment 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 time, and the surface of the blades of the wind turbine has icing phenomenon, so it is necessary to turn on the plasma control system for deicing.

[0074] Step 1. Install the plasma actuator system

[0075] The layout of the plasma actuator system is the same as step 1 of the first embodiment.

[0076] Step 2. Plasma actuator system deicing work

[0077]The icing sensor in the plasma control system 11 measures that the icing on the surface of the wind turbine blade reaches 1 mm, and is increasing at a speed of 1 mm / 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 are turned on and working, among which the plasma exciters in the control sub-regions of leading edge 1 and front upper surface 2 can be excited by...

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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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