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Multi-mode coordination control method of annular AC/DC hybrid microgrid system

An AC-DC hybrid and coordinated control technology, which is applied in the direction of power transmission AC network, etc., can solve the problem of few coordinated control methods, and achieve the effects of improving energy utilization, maintaining power balance, and smooth switching

Active Publication Date: 2019-12-20
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
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Problems solved by technology

[0006] However, in the research of microgrid energy management system, there are few methods for the coordinated control of each unit in the microgrid.

Method used

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  • Multi-mode coordination control method of annular AC/DC hybrid microgrid system
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  • Multi-mode coordination control method of annular AC/DC hybrid microgrid system

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Experimental program
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Embodiment 2

[0061] Embodiment 2: Since the switching process of each converter control strategy in the coordinated control method for grid-connected operation is included in the coordinated control method for islanded operation, the present invention only performs simulation verification during islanded operation.

[0062] The system simulation parameters are shown in Table 1. The AC line is simulated by the PI line section in the PSCAD model library, and the DC line is simulated by the series connection of resistance and reactance. This paper stipulates that the discharge power of the energy storage system is positive, and the transmission power of the AC-DC bidirectional converter from the AC side to the DC side is positive.

[0063] Table 1 Simulation parameters of AC-DC hybrid microgrid system

[0064]

[0065]

[0066] Table 2 Line Impedance Parameters

[0067]

[0068] Simulation Analysis of Island Mode1

[0069] In the initial state, the light intensity is 800W / m2, the ...

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Abstract

The invention discloses a multi-mode coordination control method of an annular AC / DC hybrid microgrid system. The annular AC / DC hybrid microgrid system is characterized in that an AC side and a DC side form a looped network structure through two AC / DC bidirectional converters, and the AC side and the DC side are radiation type networks respectively; in the annular AC / DC hybrid microgrid system, the voltage class of a medium-voltage alternating-current bus is 10 kV, the voltage class of the medium-voltage direct-current bus is + / -1.5 kV, the alternating-current side is connected with a large power grid and comprises a wind driven generator, a micro gas turbine, an alternating-current load and an alternating-current side energy storage system, and the distributed power supply and the load are connected with the medium-voltage alternating-current bus through an alternating-current transformer, the direct-current side comprises a photovoltaic power generation system, a direct-current loadand a direct-current side energy storage system, and the distributed power supply and the load are connected with a medium-voltage direct-current bus through a direct-current transformer.

Description

technical field [0001] The invention relates to the technical field of micro-grid control, in particular to a multi-mode coordinated control method for a ring-shaped AC-DC hybrid micro-grid system. Background technique [0002] Energy is an important support for the rapid development of the national economy. In recent years, with the sustained and stable growth of China's economy, the production and consumption of energy are also increasing year by year. The mining and burning of fossil energy such as coal and oil are also very common, resulting in excessive discharge of pollutants and serious damage to the ecological environment. , Energy consumption is increasingly conspicuous in restricting human economic and social development and affecting the natural environment. Under the dual pressure of energy crisis and environmental protection, countries around the world have adopted relevant policies such as improving energy utilization efficiency, improving energy structure, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/36
CPCH02J3/36Y02E60/60
Inventor 戴志辉邱小强韩健硕何永兴刘自强杨熙
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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