Multi-sub microgrid-contained mixed microgrid system and control method thereof

A hybrid micro-grid and subsystem technology, applied in the field of hybrid micro-grid systems, can solve problems such as low power level, no consideration of battery charging and discharging conversion process, bus voltage impact, etc., to achieve system power balance, maintain voltage, and realize electrical isolation Effect

Inactive Publication Date: 2014-03-19
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

Phase-shift control is used to realize the bidirectional flow of energy, which is easy to control, but the applied power level is low, and the charging and discharging conversion process of the battery is not considered. Direct conversion will cause a large impact on the bus voltage

Method used

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  • Multi-sub microgrid-contained mixed microgrid system and control method thereof
  • Multi-sub microgrid-contained mixed microgrid system and control method thereof
  • Multi-sub microgrid-contained mixed microgrid system and control method thereof

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Embodiment Construction

[0068] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0069] Such as Figure 1-Figure 2 As shown, a hybrid microgrid system with multiple sub-microgrids includes a photovoltaic subsystem, an energy storage subsystem, a DC bus, a DC / AC converter 4 and an AC subsystem, and the DC bus is connected to the photovoltaic sub-systems respectively system, an energy storage subsystem and a DC / AC converter, the DC / AC converter is connected to the AC subsystem, the photovoltaic subsystem is provided with multiple photovoltaic subsystems, and the multiple photovoltaic subsystems are connected to the DC bus , and share one energy storage subsystem, o...

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Abstract

The invention relates to a multi-sub microgrid-contained mixed microgrid system and a control method thereof. The mixed microgrid system comprises a photovoltaic subsystem, an energy storage subsystem, a direct-current bus, a DC/AC converter and an alternating-current subsystem. The control method comprises the following steps: controlling running modes of the photovoltaic subsystem and the energy storage subsystem according a power grid instruction; controlling the running mode of the photovoltaic subsystem by using a perturbation observation method-based photovoltaic generation maximum power tracking method; and controlling the running mode of the energy storage subsystem by using a method of combination of dual-closed loop control and phase-shift control. Compared with the prior art, the provided system and the method have the advantages of electrical isolation realization, high security, and stable bus voltage and the like.

Description

technical field [0001] The invention relates to a hybrid microgrid system, in particular to a hybrid microgrid system containing multiple sub-microgrids and a control method thereof. Background technique [0002] Due to the gradual depletion of fossil fuels, new energy sources have developed rapidly in recent years, and more and more new energy sources have been connected to the grid. Among these new energy sources, photovoltaic power generation is a power generation technology that directly uses solar energy. came to develop rapidly. However, due to the volatility of solar energy, photovoltaic power generation needs to be coordinated with other energy sources to achieve stable power output. [0003] As an important energy storage device, the battery can play the role of peak shaving and valley filling and improving reliability. A microgrid composed of distributed energy sources such as photovoltaics and batteries and loads, while giving full play to the resource and envir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J7/35H02J3/32
CPCY02E70/30Y02E10/563Y02E10/566Y02E10/56
Inventor 米阳田越韩云昊夏洪亮
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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