Semiconductor turbogenerator

Abstract

The invention relates to a turbine generator device for wind power generators, comprising an impeller, a driving device, and a semiconductor device, which is characterized in that an insulated gate bipolar transistor is adopted as the semiconductor device of the turbine generator, which realizes the control of speed change and frequency conversion; the bad harmonic wave performance can be overcome with the pulse width modulation (PWM); the continuous adjustment is allowed by the variable inclination angle, rotor and paddle control in order to obtain the highest power; the invention can be coupled into a DFIG system with the speed range of the generator from 900 rpm to 1900 rpm; the adoption of the control technique of insulated gate bipolar transistor can decrease the peak, flashing and the harmonic wave to the lowest extent, which is accordingly convenient for the problem of networking license; a vector control system can produce or consume the reactive energy; the precise adjustment of the power coefficient can increase the stability of the power network voltage; a power circuit enables the turbine generator to continue operating online when other places of the power network are power off.

Description

technical field [0001] The invention relates to a generator device, especially a turbine generator device of a wind power generator. Background technique [0002] The power semiconductor device required for a wind turbine generator is a single device module. Such a device needs to withstand a kiloampere-level current at a voltage of thousands of volts, making the thyristor technology widely used, but the current loss in the conduction process is very high. Large, and the performance of the conversion time is very poor, often in the range of 100ms, correspondingly, the frequency converter stage uses a waveform of 6 steps or 12 steps to approximate the energy distribution of a sine wave, resulting in particularly strong odd harmonics Waves, such as the fifth harmonic and the eleventh harmonic, affect the performance of the generator. Traditional thyristors are very durable. For example, Mitsubishi's FT1500AU-240 can switch 1.5kA current at 12kV voltage, and the switching time ...

AI Technical Summary

Problems solved by technology

[0002] The power semiconductor device required for a wind turbine generator is a single device module. Such a device needs to withstand a kiloampere-level current at a voltage of thousands of volts, making the thyristor technology widely used, but the current loss in the conduction process is very high. Large, and the performance of the conversion time is very poor, often in the range of 100ms, correspondingly, the frequency converter stage uses a waveform of 6 steps or 12 steps to approximate the energy distribution of a sine wave, resulting in particularly strong odd harmonics Waves, such as the fifth harmonic and the eleventh harmonic, affect the performance of the generator. Traditional thyristors are very durable. For example, Mitsubishi's FT1500AU-240 can switch 1.5kA current at 12kV voltage, and the switching time is 15ms. However, when the conduction current exceeds the holding current value, it is impossible for the traditional thyristor to be turned off. The GTO (gate can be turned off) thyristor (such as Mitsubishi's FG6000AU-120D) can continuously provide a voltage of 6 kV and 1.5kA, and can achieve shutdown control within 30ms, but they are difficult to drive, and worse, all SCRs are difficult to use in parallel, and to achieve the power level required by wind turbine generators, paralleling It is often indispensable to use