Pitch system and power supply method of pitch system

Abstract

The invention relates to a pitch system and a power supply method of the pitch system. The pitch system comprises an energy storage device, the input end of the energy storage device is connected with a power supply wire feed end, and the output end of the energy storage device is connected with a variable pitch drive device. The energy storage device comprises an AC / DC rectifier (4), a bidirectional DC / DC convertor (6), an energy storage element (8), a DC / AC inverter (9), another bidirectional DC / DC convertor (6) and another energy storage element (8). According to the power supply method of the pitch system, when a variable pitch drive device side load runs within a set range which is equal to or greater than rated power of the variable pitch drive device, or the voltage value of the energy storage elements is smaller than a set upper limit value of the energy storage elements or a fan variable pitch load does not exceed a set value, the energy storage elements are charged; when instant short-time peak power occurs in the variable pitch drive device side load and exceeds a set main power supply variable pitch power upper limit value or the fan variable pitch load exceeds the set value, the energy storage elements are discharged.

Description

technical field [0001] The invention relates to a pitch control system and a power supply method for the pitch control system, belonging to the technical field of wind power generation. Background technique [0002] Wind power generation is an important form of wind energy utilization. Wind energy is a renewable, pollution-free, high-energy, and promising energy source. It is a strategic choice for all countries in the world to vigorously develop clean energy. With the acceleration of world energy consumption and the reduction of traditional energy reserves, more and more attention has been paid to the green energy of wind power generation, and it has the advantage of being inexhaustible. All countries in the world have introduced various policies to vigorously support the wind power industry. In recent years, my country's wind power industry has also developed rapidly. As the grid-connected wind turbines become the best form of wind power utilization, domestic and foreign w...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a pitch system and a power supply method for the pitch system, which is used to solve the current problem of stabilizing the input power of the pitch system and enhancing the safety and reliability of the power supply, lines and slip rings of the fan pitch system. The problem of inconvenient installation and complicated wiring process

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