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Photovoltaic and diesel complementary power supply system based on DC microgrid

A DC micro-grid and diesel generator technology, applied in diesel complementary power supply systems and photovoltaic fields, can solve problems such as difficult independent control and shortened battery life, and achieve the effects of enhancing power supply reliability, increasing power generation revenue, and ensuring stable power supply

Inactive Publication Date: 2019-01-25
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The distribution of energy between the battery and the load is not easy to achieve independent control, the charging and discharging of the battery is not controlled, and the life of the battery is shortened

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 drawings.

[0024] The 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, a first unidirectional isolated DC / DC converter, a DC bus and a load connected in sequence. The first unidirectional isolated DC / DC converter is controlled by the MPPT controller, and it also includes The battery module, the diesel generator module, and the energy management system; the battery module includes a battery, a two-way isolated DC / DC converter and a charging and discharging controller. The battery is connected to the DC bus through a double-isolated DC / DC converter to charge and discharge The controller is used to collect the state parameters of the battery and control the two-way isolated DC / DC converter; the diesel generator module includes a diesel generator connec...

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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 control, and specifically 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 new energy power generation technologies such as power electronic control technology and photovoltaics, the penetration rate of distributed new energy power generation represented by wind and solar energy has been increasing, and the power consumption problems in a large number of areas without electricity have also been obtained from this. solve. [0003] In the prior art, in solar power supply or wind-solar hybrid power supply system and diesel engine power supply, the electric energy is stored in the battery. Since the battery is d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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