Generator capable of long-term grid-connected operation

Abstract

The invention discloses a generator capable of long-term grid-connected operation. The generator electromagnetic design adopts H-level insulation and F-level temperature rise. Values of parameters such as current density, line load and flux density of the generator are lower than that of a general generator. The generator provided by the invention can adapt to the long-term operation condition of a generating set. The generator adopts an automatic digital voltage regulator and reactive distribution is reasonable. Three-phase voltage detection is adopted, the voltage regulation precision is high, the steady state voltage regulation rate of output voltage is smaller than or equals to + / -0.5%, the zero load line voltage waveform distortion rate is smaller than or equals to 3%, and grid-connected requirements of the generating set can be met. The generator adopts six-pole overall rotor punching sheets, the rotation speed is 1000r / min, the motor base adopts a large-span foot circular structure, the size is small, and the operation is stable. Vibration requirements of the generating set can be met. The advantages are that the generator is low in temperature rise; the voltage regulation precision is high; long-term grid-connected operation is achieved; the size is small, the operation is stable, the vibration is small, and the cost performance is high; and the generator is particularly suitable for a large and medium-sized long-term grid connected operation generating set.

Description

technical field [0001] The invention relates to a generator, in particular to a generator capable of long-term grid-connected operation. Background technique [0002] Commonly used generators are generally used for fuel-fired generator sets, and can be used for lighting and power transmission in mines or ships. If the generator set runs for a long time, the probability of load mutation will increase, the temperature rise of the generator will change greatly, and the generator winding will be easily burned. [0003] The general generator uses an analog voltage regulator. Compared with the digital voltage regulator, the adjustment accuracy is low, and the reactive power distribution is uneven when connected to the grid, which is not conducive to the grid-connected operation of the generator set. [0004] The general large and medium-sized generators use a square base, which is large in size and heavy in weight, so the cost is high. The traditional generator is 4 poles, and th...

AI Technical Summary

Problems solved by technology

If the generator set runs for a long time, the probability of load mutation will increase, the temperature rise of the generator will change greatly, and the generator winding will be easily burned

[0003] The general generator uses an analog voltage regulator. Compared with the digital voltage regulator, the adjustment accuracy is low, and the reactive power distribution is uneven when connected to the grid, which is not conducive to the grid-connected operation of the generator set.

[0004] The general large and medium-sized generators use a square base, which is large in size and heavy in weight, so the cost is high. The traditional generator is 4 poles, and the speed is 1500r / min. Under the same conditions, the volume and vibration of the 6 pole generator are lower slightly bigger

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