Water, wind, solar and biomass multi-energy integrated complementary power generation method and device

Abstract

The invention relates to a renewable energy source integrated complementary power generation technology for a distributed power supply and provides a multi-energy integrated complementary power generation method and multi-energy integrated complementary power generation device consisting of water energy, wind energy, solar energy and other renewable energy sources. According to the method, the water energy serves as a main body, the peculiar mountain valley wind of a hydropower station is fully utilized, the solar energy, the biomass energy and other renewable energy sources which can be relatively concentrated are locally utilized and are gathered around the hydropower station, a low-voltage alternating current bus [W1] of the hydropower station serves as a grid-connected access point, and a water, wind, solar and biomass multi-energy integrated complementary power generation system which takes water and electricity as the center and takes the water and wind complementation as the basis. According to the device, a hydropower station [G1] serves as a main body, the electric energy generated by power generation subsystems [G2], [G3], [G4] and [G5] is subjected to full power conversion and is connected to the [W1] in a grid-connected mode, the original switching device and grid line of the hydropower station are utilized, and a multi-type renewable energy source integrated complementary distributed power supply which can supply power in a grid-connected mode and independently operate is formed.

Description

technical field [0001] The present invention relates to a renewable energy integrated complementary power generation method and device in distributed power sources, in particular to a method and device for distributed power sources of water, wind, light, biomass and other renewable energy sources (such as geothermal energy, ocean Energy) composed of multi-energy integrated complementary power generation method and device. Background technique [0002] Hydropower, wind power, solar photovoltaics and biomass are all renewable energy sources that are increasingly used. my country's new energy, especially renewable energy, has always implemented the development idea of ​​"adhere to walking on two legs, not only need large-scale centralized utilization, but also pay attention to decentralized utilization, adapt measures to local conditions, and develop new energy in multiple ways". [0003] my country's large-scale hydropower, wind power and solar power have developed rapidly in...

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Problems solved by technology

However, today they are also facing many problems such as environmental protection, technical bottlenecks, difficulties in grid connection, stable operation, and overcapacity.

[0004] At the same time, small hydropower, small wind power, small photovoltaic, biomass energy, and geothermal power generation (commonly known as the "five small" renewable energy sources), etc., due to small capacity, strong seasonality, strong randomness, poor stability and reliability, and difficulty in grid connection Inherent deficiencies such as difficult peak regulation, etc., and the more important thing is that they are scattered and isolated power generation, and cannot form a network system. Therefore, despite the urgent needs of my country's vast rural areas, mountainous areas, and islands, small-scale renewable energy has long been on the edge of "alternative energy" , can not get scale development

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