Network system comprising energy storage and energy router and energy adjustment method

Abstract

The invention provides a network system comprising energy storage and an energy router and an energy adjustment method, and belongs to the field of application design of a renewable energy source energy control device and application of a grid-connected technology in a renewable energy source power network. The network system comprises a renewable energy source AC generation system, an AC load, the energy router, a two-way AC / DC converter and a hybrid energy storage system, wherein the overall network system can quickly and accurately carry out power throughput and energy exchange with renewable energy source power generation, achieves stabilization of short-time rapid power fluctuation of renewable energy source power generation and long-time energy supplement and storage and simultaneously meets the requirements of high power density, high energy density, long cycle lifetime and low price level. The energy router can achieve independent and accurate control and adjustment on charging and discharging of different energy storage elements according to the requirements, so that the performance advantages of the energy storage elements are fully developed in the process of achieving real-time stabilization of power fluctuation of a distributed energy source power generation system.

Description

technical field [0001] The invention belongs to the application design of a renewable energy energy control device and its grid-connected technology application field in a renewable energy power network, and specifically relates to a network system including energy storage and an energy router and an energy adjustment method. Background technique [0002] With the advancement of advanced science and technology and the improvement of the world's economic development level, the demand for energy in countries around the world is also increasing, and traditional fossil energy is tending to be exhausted; therefore, the integration and development of new energy is more and more popular attention and pursuit, especially wind energy and solar energy have been more widely developed and utilized due to their unique advantages. However, these two energy sources are completely affected by nature and are uncontrollable, with great randomness and intermittency; with the increase of the pr...

AI Technical Summary

Problems solved by technology

[0005] However, common pumped hydro energy storage, flywheel energy storage, compressed air energy storage, lead-acid, lithium-ion, liquid flow, nickel-cadmium (Ni-Cd), sodium-sulfur (Na-S) batteries, superconducting coil energy storage and superconducting A single energy storage element such as capacitive energy storage is difficult to meet or cannot meet the requirements of high frequency and high power fluctuations, high energy density, long cycle life and low cost at the same time. Each energy storage has its own advantages and disadvantages. From On the whole, components with high energy density generally have low power density and short cycle life such as lead-acid chemical batteries; components with high power density have long cycle life but low energy density, such as supercapacitors; at the same time, they have high energy Density and high power density components are very expensive, such as lithium-ion batteries; this limits the rapid development and wide application of single energy storage components in power systems; supercapacitors are a new type of energy storage in recent years The power energy storage element, with its relatively long service life, wide operating temperature range, fast charge and discharge speed, and high power density, just makes up for the shortcomings of the battery effectively, so it has Huge room for development;

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