Grid-connection type photovoltaic direct current microgrid system and operational control method therefor

A technology of DC micro-grid and photovoltaic power generation, which is applied in the field of power grid, can solve the problems of many times of charging and discharging of batteries, large configuration of super capacitors, and easy to affect life expectancy, etc., to achieve enhanced environmental protection characteristics, high overall conversion efficiency, and power conversion links little effect

Inactive Publication Date: 2016-02-24
中广核太阳能开发有限公司 +2
View PDF3 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The power supply method of hybrid energy storage of batteries and supercapacitors is still seldom used in DC microgrids, and there are various problems in the existing hybrid energy storage solutions, such as many times of charging and discharging of batteries, which is eas

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Grid-connection type photovoltaic direct current microgrid system and operational control method therefor
  • Grid-connection type photovoltaic direct current microgrid system and operational control method therefor
  • Grid-connection type photovoltaic direct current microgrid system and operational control method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] Please check Figure 1 to Figure 5 , a grid-connected photovoltaic DC microgrid system, which includes a DC bus 10, a photovoltaic power generation unit 20, an energy storage unit 30, a capacitor 40, a mains grid side 50, an energy management unit and a load.

[0034]The photovoltaic power generation unit 20 is connected to the DC bus 10 through the first unidirectional DC / DC converter 1, the energy storage unit 30 and the capacitor 40 are respectively connected through the first bidirectional DC / DC converter 2 and the second bidirectional DC / DC converter 3 As for the DC bus 10 , the mains grid side 50 is connected to the DC bus 10 through the bidirectional AC / DC converter 4 , and the load is connected to the DC bus 10 . The energy management unit includes a main control module and an operation monitoring module that is installed in each unit of the microgrid system and monitors the operating status of each unit. The operation monitoring module communicates with the mai...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a grid-connection type photovoltaic direct current microgrid system and an operational control method therefor. The microgrid system comprises a direct current busbar, a photovoltaic generation unit, an energy storage unit, a capacitor, a mains supply grid side, an energy management unit and a load; the photovoltaic generation unit is connected with the direct current busbar through a first one-way DC/DC converter; the energy storage unit and the capacitor are connected with the direct current busbar through a first bidirectional DC/DC converter and a second bidirectional DC/DC converter separately; the main supply grid side is connected with the direct current busbar through a bidirectional AC/DC converter; and the load is connected with the direct current busbar. According to the operational control method, the power supplies for the mains supply grid side, the photovoltaic generation unit, the energy storage unit and the capacitor are fully coordinated in terms of the power supply sequences and logics, so as to ensure the reliability of power supply and higher economic benefits.

Description

technical field [0001] The invention relates to the field of power grids, in particular to a grid-connected photovoltaic DC microgrid system and an operation control method thereof. Background technique [0002] With the rapid growth of the national economy, the demand for electricity has grown rapidly. For a long time, the power production sector has mainly used the construction of large-scale power plants and ultra-high voltage long-distance transmission lines as solutions, but the investment is large, the construction period is long, and the environment Disadvantages such as pollution have also become increasingly prominent. On the other hand, several large-scale power outages at home and abroad in recent years have also made people aware of the vulnerability of centralized power supply systems. Distributed generation technology (distributed generation, DG) came into being under such circumstances. [0003] Distributed generation technology (DG) has the characteristics ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H02J7/35H02J7/34H02J3/38H02J3/28
CPCH02J3/28H02J3/383H02J7/345H02J7/35Y02E10/56Y02E70/30
Inventor 邱河梅张风燕靳志会杨贇李明孟超纪承承
Owner 中广核太阳能开发有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap