Wind power generation grid connected configuration system

Abstract

The present invention provides a wind power generation grid connected configuration system (for short a system). The system is composed of a wind generation set, an electric air pump, an air storage tank, an air power generation set, a boosting transformer and a grid connected cabinet group. The deficiencies in the prior art are overcome, the grid connected electric quantity can be stably and continuously transmitted, the situations are thoroughly changed that the wind generation gird connected energy is changed in size and the power grid is continually cut in and out, the impact of the wind power integration on the power grid is eliminated, the peak of the power grid can be regulated, and the power transmission capability of the power grid is improved. The work section of a wind generation set can be increased, and the utilization rate of the wind generation set can be improved. An inverter with low reliability can be omitted, the service life and the stability of the wind generation can be improved, and the operation cost can be reduced. The wind power generation grid connected configuration system can thoroughly eliminate the electricity give-up phenomenon in the wind power industry.

Description

Technical field [0001] The invention relates to a wind power generation grid-connected configuration system. Background technique [0002] There are two power generation configuration modes of wind power generation separated grid and grid-connected type. For the off-grid wind power generation mode, a wind power generation configuration system (patent application number: 201410392299.x) provides a new configuration mode. This The invention will propose a new configuration mode for the grid-connected wind power generation system. [0003] The configuration of the existing grid-connected wind power generation system generally adopts the following mode: wind turbine + inverter (or converter) + step-up transformer + grid-connected cabinet, where the wind turbine includes wind blades, generators and The controller has three parts, and the generator converts wind energy into electrical energy under the action of wind force. The inverter rectifies the unstable AC power generated b...

AI Technical Summary

Problems solved by technology

From the above analysis, it can be seen that in the existing wind power generation grid-connected configuration system, the utilization of wind energy can only take a small section in the middle. The waste, more importantly, wind turbines are frequently cut in and out of the power grid, which has a great impact on the power grid

This wind power grid-connected mode cannot realize continuous power transmission to the grid, and can only transmit power to the grid in a certain wind range

[0004] Even within the interval of wind power transmission to the grid, the existing wind power grid-connected mode cannot achieve stable power transmission to the grid, because the natural wind fluctuates from time to time, and the generated power will also vary from time to time. It is erratic and has a great impact on the power grid, which is likely to cause the oscillation of the power grid

[0005] Based on the above reasons, combined with the fact that the capacity of China's power grid is relatively small and the transmission distance of the power grid is long, the power grid department is unwilling to accept wind power grid connection, and even calls wind power garbage power. The phenomenon of power abandonment is serious, resulting in a huge waste of energy

[0006] In addition, in the existing wind power grid-connected configuration system, the inverter is an electronic device with high price and poor reliability, resulting in the high cost of wind power generation and high operation and maintenance costs, which affects the development of the wind power industry

[0007] At present, the situation that my country's wind power industry is facing is: on the one hand, the country must vigorously develop the wind power industry from the perspective of energy strategy. At present, my country's wind power installed capacity has reached the world's largest country, and it has become the third largest power generation field in China. On the other hand, the power grid However, the department tried every means to set thresholds to restrict wind power grid connection, resulting in the dilemma that a large number of wind turbines can only idle and cannot be connected to the grid for power generation, which has become a bottleneck affecting the development of the wind power industry

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