Small-and-medium-sized grid-connected pitch-variable wind generator system

Abstract

The invention provides a small-and-medium-sized grid-connected pitch-variable wind generator system. The small-and-medium-sized grid-connected pitch-variable wind generator system comprises a centrifugal pitch-variable speed stabilizing device (3), an alternating-current asynchronous motor (5) and an active rotating speed sensor (6), and the centrifugal pitch-variable speed stabilizing device (3) is capable of stabilizing rotating speed under the condition of wind speed higher than 4m / s. By the small-and-medium-sized grid-connected pitch-variable wind generator system, grid-connected power generation can be realized without storage batteries and grid-connected inverter controllers, and the problem that wind generation cost is high since the storage batteries and the grid-connection inverter controllers for existing small-and-medium-sized grid-connected wind generators are high in price and easy to damage is solved. The small-and-medium-sized grid-connected pitch-variable wind generator system has the advantages of low system equipment production cost, high generating efficiency, reliable operation, simplicity in grid connection and long mechanical service life, can normally generate electricity under the conditions of 2-level wind to 16-level hurricane, and can work for a long term without being maintained.

Description

technical field [0001] The invention relates to a small and medium-sized wind power generator system, especially a small and medium-sized grid-connected wind power generation system. Background technique [0002] The development of small and medium-sized wind turbine systems on the market has been facing difficulties due to the high price and short life of batteries. In order to reduce the cost of wind energy utilization, all countries in the world support the grid-connected operation of wind power generation to form distributed wind power generation, the so-called cloud power generation. At present, our country may allow personal wind turbines to be connected to the grid, but the current small and medium-sized wind turbines must be connected to the grid through the grid-connected inverter controller. Moreover, the grid-connected inverter controller is expensive, the circuit is complicated, and the waveform error It is large and easy to damage, which also leads to high powe...

AI Technical Summary

Problems solved by technology

At present, our country may allow personal wind turbines to be connected to the grid, but the current small and medium-sized wind turbines must be connected to the grid through the grid-connected inverter controller. Moreover, the grid-connected inverter controller is expensive, the circuit is complicated, and the waveform error Large and easily damaged, it also causes high power generation costs (higher than the price of grid electricity), making grid-connected wind power generation difficult and difficult to promote

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