Photovoltaic and diesel complementary power supply system based on DC microgrid

A DC microgrid and power supply system technology, applied in diesel complementary power supply system and photovoltaic field, can solve the problems of difficult to achieve independent control and shorten battery life, and achieve the effect of enhancing power supply reliability, improving power generation revenue, and optimizing operation.

Inactive Publication Date: 2016-08-10
WUHAN UNIV OF TECH
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Problems solved by technology

The distribution of energy between the battery and the load is not easy to achieve independent control,

Method used

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  • Photovoltaic and diesel complementary power supply system based on DC microgrid
  • Photovoltaic and diesel complementary power supply system based on DC microgrid

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with specific examples and accompanying drawings.

[0024] The present invention provides a photovoltaic and diesel complementary power supply system based on DC microgrid, such as figure 1 As shown, it includes a photovoltaic power generation module connected in sequence, a first unidirectional isolated DC / DC converter, a DC bus and a load, and the first unidirectional isolated DC / DC converter is controlled by an MPPT controller, and it also includes A battery module, a diesel generator module, and an energy management system; the battery module includes a battery, a bidirectional isolated DC / DC converter and a charging and discharging controller, and the battery is connected to the DC bus through a double isolated DC / DC converter, and the charging and discharging The controller is used to collect the state parameters of the battery and control the bidirectional isolated DC / DC converter; the diesel ge...

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Abstract

The invention provides a photovoltaic and diesel complementary power supply system based on a DC microgrid. The system comprises a photovoltaic power generation module, a first unidirectional isolated DC/DC converter, a DC bus and a load, which are connected in sequence. The first unidirectional isolated DC/DC converter is controlled by an MPPT controller. The system also comprises a storage battery module, a diesel generator module and an energy management system. The energy management system collects work states of all devices through the bus, and sends a scheduling instruction under a preset operation mode. The system can realize the purposes of optimizing operation of a power supply system, improving power generating income, prolonging device service life and enhancing power supply reliability and the like.

Description

technical field [0001] The invention belongs to the technical field of power generation and power supply control, and in particular relates to a photovoltaic and diesel complementary power supply system based on a DC microgrid. Background technique [0002] With the increasing energy crisis and environmental problems, countries all over the world are paying more attention to the development of new energy. In recent years, with the development and maturity of power electronic control technology and new energy generation technologies such as photovoltaics, the penetration rate of distributed new energy generation represented by wind energy and solar energy has continued to increase, and the problem of electricity consumption in a large number of areas without electricity has also been solved. solve. [0003] In the prior art, in solar power supply or wind-solar complementary power supply system and diesel engine power supply, the electric energy is stored in the battery, sinc...

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Application Information

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IPC IPC(8): H02J1/10H02J7/35H02J1/14
CPCH02J1/10H02J1/106H02J1/14H02J7/35Y02E10/56
Inventor 李浩周鹏严家俊贾舒然李迪昂洪雨洲
Owner WUHAN UNIV OF TECH
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