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Wind-light-diesel complementary AC/DC intelligent micro-grid system

A micro-grid and complementary technology, applied in wind power generation, photovoltaic power generation, current collectors, etc., can solve problems such as power abandonment loss, waste, and difficulty in power generation systems, so as to reduce conversion losses, save diesel fuel, and eliminate instability sexual effect

Inactive Publication Date: 2014-01-22
SHANGHAI WIND NEW ENERGY TECH
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Problems solved by technology

[0002] Since wind and solar new energy is an unstable natural energy, it will inevitably be affected by random fluctuations. Therefore, it will be criticized by the large power grid when it is connected to the grid, and the self-contained power generation system will be constrained by the price and performance of energy storage batteries. Complementary technology to reduce energy fluctuations. The current complementary power generation is mainly the two-complementary power generation system among the three, such as wind-solar hybrid, solar-diesel hybrid or wind-diesel complementary power generation system, while the wind-diesel three-complementary power generation system is more difficult and has fewer applications ; In the new energy systems that use diesel generators as a complement, most of them use diesel generators as the main technology route and wind power as a supplement. The proportion of wind power is only less than 20%. The purpose is only to save diesel consumption. Wind and wind power only plays a supporting role and fails to play a positive role in new energy; in addition, when the wind and wind power exceeds the power load and the battery is fully charged, the wind and wind power cannot be effectively used, and it can only be wasted in vain, causing waste. electrical loss

Method used

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Embodiment Construction

[0008] figure 1 It is a system structure block diagram of the system of the present invention. In the figure, the wind power sub-system (1) adopts a synchronous AC wind generator. The generator rotates to generate electricity under the drive of the wind kinetic energy, and outputs non-constant frequency AC, which is rectified into DC by a rectifier and charged to a storage battery or a supercapacitor. The rectifier can be optional. controlled rectifier, or a controlled rectifier. Since the output of the solar PV power generation sub-system (2) is direct current, it can be connected to the system as long as the voltage and current are suitable, without a rectifier. Both of them can be used for charging and storing energy of the storage battery or the supercapacitor energy storage subsystem (4). Direct current can be used directly for some electrical loads, such as LED lighting, water electrolysis for hydrogen production, or heat generation through heating resistors. But, bec...

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Abstract

A wind-light-diesel complementary AC / DC intelligent micro-grid system is composed of the following components: a wind power generating subsystem (1), a solar PV power generating subsystem (2), a diesel generator subsystem (3), an accumulator or super-capacitor energy storage subsystem (4), a converter subsystem (5), etc. The wind-light-diesel complementary AC / DC intelligent micro-grid system can stably supplies AC power and DC power. According to the wind-light-diesel complementary AC / DC intelligent micro-grid system, a novel complementary structure in which wind power and light power are used as main power and the power generated by the diesel engine is used as auxiliary power is used for establishing a micro-grid; and the total ratio of wind power and light power can exceed 80% and stable power supply can be realized. The wind-light-diesel complementary AC / DC intelligent micro-grid system is different from the traditional complementary system in which the power generated from diesel oil is used as main power and provides a new approach for settling a defect of instability in wind-and-light power integration, and is a novel system concept for the new energy arrangement electric grid.

Description

field of invention [0001] The invention belongs to the power generation, transformation or distribution of electric power in electricity, belongs to the technical field of conventional power generation and new energy power generation, and relates to new energy power generation, current conversion, power consumption and automatic control of power grids. , solar PV power generation and a composite micro-grid system composed of traditional diesel generators. Background technique [0002] Since wind and solar new energy is an unstable natural energy, it will inevitably be affected by random fluctuations. Therefore, it will be criticized by the large power grid when it is connected to the grid, and the self-contained power generation system will be constrained by the price and performance of energy storage batteries. Complementary technology to reduce energy fluctuations. The current complementary power generation is mainly the two-complementary power generation system among the ...

Claims

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Application Information

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IPC IPC(8): H02J3/38H02J7/35
CPCY02A30/60Y02E10/56Y02E10/76
Inventor 於岳亮於菲
Owner SHANGHAI WIND NEW ENERGY TECH
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