Power confluence method of multiple high altitude wind generating sets for intermittent power generation

Abstract

The invention discloses a power confluence method of multiple high altitude wind generation sets for intermittent power generation, comprising the following steps of: respectively obtaining wind power from an air work-applying umbrella of each high altitude wind generating set, transmitting the obtained wind power to a ground winding drum by a tether, converting the obtained wind power into a mechanical power so as to drive a generator to generate electricity after accelerated by a gearbox, converting the current into a power-frequency three-phase AC (Alternating Current) by a full-power converter, and then carrying out the confluence of the power-frequency three-phase AC output by all high altitude wind generating sets and merging into the power network. By the technical scheme of the invention, the shortage of mechanical confluence can be overcome, and the power confluence of multiple high altitude wind generation sets for intermittent power generation is feasible.

Description

technical field [0001] The invention relates to wind power generation technology, in particular to a method for converging power of high-altitude wind power generating sets with multiple intermittent power generation. Background technique [0002] Wind energy has become one of the most practical forms of renewable energy due to its advantages of wide distribution, reusability and mature technology. The most common way to use wind energy in the past few decades is to capture wind energy to generate electricity through wind turbines equipped with wind rotors. At present, most of the wind turbines of wind turbines operate in the lower part of the near-earth boundary layer, where the annual average wind speed is usually 4-6m / s, and the wind energy density is not high. The power generation and capacity factor are small. If the wind turbine is made larger and the economy is improved through a larger single-unit capacity, it will bring about an increase in the size of the whole ma...

AI Technical Summary

Problems solved by technology

The disadvantages of [0010] mechanical confluence are;

[0011]1. To combine multiple powers, the differential gear train needs to have a corresponding number of input shafts, and it is often necessary to design a multi-stage differential structure, which is too complicated and expensive high

A wind farm usually has dozens or even hundreds of units, it is impossible to use a differential gear train to achieve confluence, and it is still necessary to divide and combine flows, and the smoothness of the output power curve is limited

[0012]2. According to experience, the distance between high-altitude wind energy generator sets should not be less than the tether length of the working part, and the scale can reach several kilometers, but the differential gear It is impossible to design the size of the wind turbine very large, which limits the mutual distance between the high-altitude wind energy generators. If the distance is too small, the tethers of the aerial work parts may be entangled in the air, causing accidents

[0013]3. The confluence method is to combine the mechanical power first, and then generate electricity, that is to say, use multiple aerial power umbrellas to drive a generator to generate electricity, so the generator capacity Large, lack of maneuverability, when part of the air power parachute exits for some reason, the efficiency of the generator is low

[0014] Therefore, in the large-scale application of high-altitude wind power generation, it is basically infeasible to adopt the method of mechanical confluence

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