A DC/DC converter topology

Abstract

The invention belongs to the field of power network control circuit topology, in particular to a DC / DC converter topology. According to the invention, each power source of the structure is capable oftransmitting or receiving electrical energy individually or simultaneously with a load or grid, enabling flexible two-way flow management, high frequency coupling transformer with three windings realizes electrical isolation, At that same time, the turn ratio can be designed quickly according to the voltage matching relation of the front and back terminals, Circuit and equipment design complexityis simplify, by using the shunt capacitor of the switch and the leakage inductance of the transformer to realize the resonance and energy conversion, the soft switching can be realized without the aidof the peripheral auxiliary circuit, the circuit structure is simplified, the circuit cost is reduced, the energy conversion requirement under different power can be met, and the application range ofthe converter is improved.

Description

technical field [0001] The invention belongs to the field of power grid control circuit topology, in particular to a DC / DC converter topology. Background technique [0002] With the continuous development of social economy, people's demand for electric energy is getting higher and higher. Restricted by the energy crisis and environmental problems, people have begun to vigorously develop various renewable and clean energy sources, including wind power, water power, solar energy, biomass energy, and geothermal energy. , tidal energy, etc. Among them, wind power and solar energy are rich in resources, friendly to the environment, and the resources are widely distributed. They are the two most common clean energy sources. But at the same time, most of these renewable energy sources cannot sustain stable output. For example, solar energy, wind energy, and tidal energy are limited by environmental factors, and their output is intermittent and uncertain, which causes these unstable...

AI Technical Summary

Problems solved by technology

But at the same time, most of these renewable energy sources cannot sustain stable output. For example, solar energy, wind energy, and tidal energy are limited by environmental factors, and their output is intermittent and uncertain, which causes these unstable electric energies to be brought to the power system during the process of inputting into the grid. to run and control instability

Affected by the randomness of the output power of renewable energy, the frequency and power characteristics of the grid voltage cannot be accurately controlled, which will easily cause the performance of the grid to decline and increase the difficulty of power system maintenance.

In order to reduce the effect of power dispatching control and other issues, various converters are required to realize the coupling conversion between different energies, and reduce the adverse impact of these power sources on the power grid while introducing the electric energy from various renewable energy and other independent power sources into the power grid

However, the existing converters have problems such as complex structure, difficulty in effectively realizing electrical isolation, difficulty in meeting high-voltage loads, and difficulty in realizing soft switching.

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