DC microgrid technology-based distributed power source energy management system

An energy management system and distributed power supply technology, applied in parallel operation of DC power supply, without intermediate conversion equipment for AC conversion, and conversion of AC power input to DC power output, etc., to facilitate coordinated control, reduce costs, and reduce quantities Effect

Pending Publication Date: 2018-01-19
SHANGHAI INST OF QUALITY INSPECTION & TECHN RES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing distributed power energy management system has many deficiencies in phase matching, harmonic control, reactive power compensation, etc.

Method used

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  • DC microgrid technology-based distributed power source energy management system
  • DC microgrid technology-based distributed power source energy management system
  • DC microgrid technology-based distributed power source energy management system

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0033] The present invention aims to provide a distributed power supply energy management system based on DC micro-grid technology, which is characterized in that it includes an input stage 1 and an output stage 15, the input stage 1 is used to provide power, and the output stage 15 is used to The power grid 26 or the load 25 outputs electric energy, a DC blocking capacitor 14 is provided between the input stage 1 and the output stage 15, and a control switch 24 is arranged in series between the output stage 15 and the unidirectional power grid 26, and the control switch 24 is used to switch the output stage 15 Output to the one-way grid 26 or the load 25; the input stage 1 includes a photovoltaic module 2 and a lithium battery module 8, the photovoltaic module 2 is used ...

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Abstract

The invention discloses a DC microgrid technology-based distributed power source energy management system. The system is characterized by comprising an input stage and an output stage. The input stageis used for providing a power supply, and the output stage is used for outputting the electric energy to a one-way power grid or a load. An isolation capacitor is arranged between the input stage andthe output stage. A control switch is connected between the output stage and the one-way power grid in series. The input stage comprises a photovoltaic assembly and a lithium battery assembly. According to the invention, all micro-power supplies of the system are convenient to coordinate and control. Through controlling a direct-current bus voltage, the power balance between the power supply andthe load can be realized. The converters work independently and do not need to be in communication with each other. The entire system is isolated from a public power grid, so that the disturbance of the public power grid is isolated. The entire system is used as a whole to provide certain dynamic support for the public power grid. A common converter replaces each independent converter, so that theutilization rate of the converter is improved. The number of power electronic devices is reduced, and the cost is reduced.

Description

technical field [0001] The invention relates to power supply energy management, in particular to a distributed power supply energy management system based on DC micro-grid technology. Background technique [0002] Microgrid is a form of power grid, which is mainly composed of distributed power generation units, energy storage units and local loads. As a whole, it can operate independently or be connected to the public grid for parallel operation. The traditional microgrid research mainly focuses on the AC microgrid system, which is easy to adapt to the traditional AC power system. In recent years, DC technology has developed rapidly. Since DC systems do not have many characteristics such as phase, harmonics, and reactive power, and many new energy power generation and energy storage units have DC output characteristics, research on DC microgrid systems has attracted much attention. There are many deficiencies in the existing distributed power energy management system in te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J1/10H02J7/35H02M3/07H02M7/797
CPCY02E10/56
Inventor 陈苏声杨雪蛟王婷婷刘邓
Owner SHANGHAI INST OF QUALITY INSPECTION & TECHN RES
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