Power feed-forward compensation based isolated operation direct current micro grid energy storage voltage stabilizing control method

A technology of feedforward compensation and voltage stabilization control, which is applied in the field of microgrids to maintain the stability of the DC bus voltage, suppress measurable power disturbances, and improve system stability and energy utilization efficiency

Inactive Publication Date: 2015-02-04
GUANGXI UNIV
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Problems solved by technology

Since the energy density of supercapacitors is higher than that of batteries, they have faster response speeds. At present, there are many studies on the application of supercapacitors in busbar voltage regulation control, but this is only the traditional optimization of battery energy storage control, without the source of disturbance set out to solve the problem

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  • Power feed-forward compensation based isolated operation direct current micro grid energy storage voltage stabilizing control method
  • Power feed-forward compensation based isolated operation direct current micro grid energy storage voltage stabilizing control method
  • Power feed-forward compensation based isolated operation direct current micro grid energy storage voltage stabilizing control method

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with accompanying drawing.

[0026] The present invention operates the DC microgrid system in isolation such as figure 1 As shown, the system includes a battery Boost / Buck charging and discharging circuit 1, a photovoltaic Boost boost circuit 2, a fan Boost boost circuit 3, a single-phase inverter circuit 4, and a DC bus 5, the positive pole 18-1 of the DC bus 5, Negative pole 18-2, a DC bus capacitor 15 is arranged between the positive and negative poles, and the DC bus capacitor C connected between the positive pole and the negative pole of the DC bus dc . The positive and negative poles of the battery Boost / Buck charging and discharging circuit 1, the photovoltaic Boost boosting circuit 2, the fan Boost boosting circuit 3, and the single-phase inverter circuit 4 are respectively connected to the positive and negative poles of the DC bus 5, and through the DC bus 5 The energy exchange of the system...

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Abstract

The invention discloses a power feed-forward compensation based isolated operation direct current micro grid energy storage voltage stabilizing control method. An isolated direct current micro grid system platform comprises a plurality of circuit modules which are connected through a direct current bus and the direct current bus is served as an energy exchange intermediary agent of the direct current micro grid system, keeps the voltage of the direct bus to be consistent and is significant meaningful in the energy exchange and the stable operation of the system. According to the power feed-forward compensation based isolated operation direct current micro grid energy storage voltage stabilizing control method, direct current bus voltage fluctuation caused by renewable energy source fluctuation and load fluctuation in the direct current micro grid is restrained and eliminated through a power feed-forward compensation voltage stabilizing control method, the system operation stability is improved, the equipment working reliability is improved, the equipment maintenance costs are reduced, and the equipment service life is prolonged.

Description

technical field [0001] The patent of the present invention relates to the microgrid field of renewable energy power generation technologies such as photovoltaic power generation and wind power generation, and more specifically to an isolated DC microgrid energy storage and voltage stabilization control method based on power feedforward compensation. Background technique [0002] With the rapid development of society and economy in today's world, the society's demand for energy has increased rapidly, and the environmental problems caused by various fossil energy consumption have become increasingly prominent. Developing a low-carbon economy, building an ecological civilization, and realizing sustainable discovery have become human beings. There is a general consensus in the society that the development of clean and renewable energy resources has become an important strategy for the sustainable development of society and economy in all countries in the world. The microgrid dev...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32
CPCH02J7/35Y02E70/30
Inventor 吕智林唐文强胡立坤谭颖李苏川
Owner GUANGXI UNIV
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