From the early days of human development, they put to use wind as an energy source, 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, Rexroth produced by wind turbines can still run. 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 cabin yaw drive to locate a suitable location. Wind measurements, including wind speed and wind direction sensor sensors, along with the development of wind power generators 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 sensors, temperature, humidity, wind generators , and pressure sensors and other applications will be promoting the product.” which, due to current sensor is a 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 closed loop control part of the converter, you can ensure that the inverter quick response. 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 the current rating of the closed-loop with a small current sensor is 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 windmill 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 the domestic wind power more in “Three North” (north, northeast, northwest), and coastal areas, climate is relatively poor, so the wind generators high on the sensor performance requirements, especially for heating function, seismic resistance, high-frequency electromagnetic interference, anti-reverse polarity (connect) and wind direction indicators such as shock and vibration requirements of capacity is far higher than the universal sensor performance indicators, and tidal power station unit also requires water sensors have good anti-corrosion .
Jian-Lin Li said the sensor in the application of the wind industry is not confined to the wind generation industry, will China’s power industry, the use of sensors is more occasions. In the power plant, power plant mainly uses pressure sensors, temperature sensors, 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. “

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