subject: Traditional Sensor Technology Development In The Wind Power Industry Analysis - Sensors, Technology, [print this page] From the early days of human development, they quickly Wind Energy As an energy source to use, with the scientific and technological development, people began to use wind power more accurately.
Germany, Schleswig - Holstein is located between the North Sea and Baltic Sea, not even in the case of wind power, wind power produced by Rexroth Generator Still running. If the wind changes from northwest to north 8 degrees, wind measurements will be the sensor to the signal transmission to the control system, control yaw Drive The engine room targeted to the appropriate location. Wind measurements include wind speed Sensor And wind direction sensors, along with the development of wind power industry to develop. In general, the wind speed sensor should meet the measurement range of 0 to 60 m / s, the error range of 0.5 m / s within the working environment temperature should be to meet local air temperature. The wind sensor should meet the measurement range of 0 ~ 360 degrees, 2.5 degree accuracy within the working environment temperature should meet the local temperature conditions.
Institute of Electrical Engineering Chinese Academy of Sciences Research Associate Li Jianlin new energy group, said, "wind power industry on the measurement of high voltage, high current sensors, Vibration sensor , Temperature, humidity, wind, and pressure sensors will be to promote product applications. "One, because the current sensor is wind turbine components in the converter is essential, in the application of wind power industry is particularly important. In some Inverter , The small and PCB installed with a current sensor is widely used. These sensors are part of the converter closed-loop control, ensuring rapid response inverter. When the inverter and the generator of intelligent power control also used, to ensure that wind turbines can start after the wind speed in a very wide range to provide continuous power for the grid until the wind turbines in the ceiling when the shutdown date. In order to drive the best location, each converter will be current within the sensor for continuous measurement, the circuit controller quality and ultimately by the current sensor response time and performance and to determine the design. This is a small current rating of the closed-loop current sensors are widely used in wind power industry reasons. In addition to excellent linearity and accuracy, the closed-loop current sensor itself has a high bandwidth and fast response time and so on.
Jian-Lin Li pointed out that the domestic market has yet to be current sensor development, especially high-current sensor technology, lags far behind international standards. As the domestic high-current sensor technology is relatively immature, the domestic wind power machine manufacturers in the procurement of high-current sensors, most will choose to import products, the prices of imported products is often higher than the price of domestic products, which to some extent, increase production cost pressures. In the small current sensor technology, the technological level of domestic and international level is not much difference.
As domestic wind power and more in "Three North" (north, northeast, northwest), and coastal areas, climate is relatively poor, so the wind turbine high on the sensor performance requirements, especially for heating, seismic resistance, high-frequency electromagnetic interference, anti-reverse polarity (connect) and wind direction indicators such as ability to shock and vibration requirements of the sensor is far higher than the general performance, and tidal power station unit also requires a good anti-sensors Seawater.
Li Jianlin, said sensor applications in the wind power industry is not limited to wind power industry, the electric power industry, the use of sensors is more occasions. In the power plant, power plant mainly uses pressure sensors, Temperature Sensor , Flow sensors, mainly used in power transmission in the field voltage sensor, current sensor. Most of them are technological level but require a higher reliability and stability of common sensors, and require a higher technical level light sensor applications are also less in the power industry. As the power plant, power station sensor device manufacturers generally choose from the unit, so the relatively high internal sensors. Transmission field is different, the relative power in the field, a one-time investment because of the sensor is relatively small, select brand each grid area is not very sensitive to price, and the use of some relatively new technology can improve the transmission and distribution, and so the foreign brands of sensors apply more. "
