Wind, light and superconducting magnetic energy storage hybrid power generation system based on current-source inverters

Abstract

The invention relates to a wind, light and superconducting magnetic energy storage hybrid power generation system based on current-source inverters. The wind, light and superconducting magnetic energy storage hybrid power generation system comprises a fan 6, a motor-side current-source inverter 5 connected with the fan 6, a photovoltaic (PV) cell panel 9, a unidirectional power booster converter 8, a voltage / current converter 7, a first superconducting magnetic coil 3, a second superconducting magnetic coil 4, a current-source grid-connected inverter 2 and a grid-connected inductor 1. The direct current (DC) side of a motor-side converter of a wind power generation system, the DC side of a PV-side converter of a PV power generation system and superconducting magnetic-energy-storage superconducting magnetic coils are in series connection together and share the current-source grid-connected inverter at a grid side. A superconducting magnetic energy storage system, the wind power generation system and the PV system are effectively integrated at the DC side, the superconducting magnetic coil at the DC side can store energy, the unstable output power of wind power generation and PV power generation caused by natural conditions can be smoothened, and the wind, light and superconducting magnetic energy storage hybrid power generation system based on the current-source inverters has a good current-limiting function when an electric grid is subjected to short-circuit fault.

Description

technical field [0001] The invention relates to a wind, light and superconducting magnetic energy storage hybrid power generation system structure based on a current source inverter, and belongs to the technical fields of electrician, power electronics and new energy power generation. Background technique [0002] Distributed power generation based on renewable energy is developing rapidly around the world for the following reasons: (1) Traditional energy such as coal will produce carbon oxides, causing environmental pollution and greenhouse effect. (2) An open electricity market will allow more electricity suppliers to participate in grid bidding. (3) The contradiction between the ever-increasing demand for electricity and the shortage of power supply. This is especially prominent in developing countries such as China and India. Compared with the growth rate of traditional energy such as coal, the annual growth rate of renewable energy in the past few years has exceeded 3...

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Problems solved by technology

(3) The contradiction between the ever-increasing demand for electricity and the shortage of power supply

[0006] There are several key technical difficulties: (1) Traditional wind and solar hybrid power generation systems are connected in parallel on the AC side of the power grid through the independent grid-connected inverters of the wind power generation system and photovoltaic power generation system; The converters are connected in parallel at the DC voltage bus, and then connected to the grid through a common voltage source inverter

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