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Microgrid and microsource control method based on virtual synchronous electric generator

A virtual synchronization and control method technology, applied in the field of electrical engineering, can solve the problem of insufficient simulation of the operating characteristics of synchronous generators

Active Publication Date: 2014-08-06
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, some methods based on droop control are only suitable approximations for the droop external characteristics of synchronous generators, which are not enough to simulate the real operating characteristics of synchronous generators

Method used

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  • Microgrid and microsource control method based on virtual synchronous electric generator
  • Microgrid and microsource control method based on virtual synchronous electric generator
  • Microgrid and microsource control method based on virtual synchronous electric generator

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Embodiment Construction

[0082] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0083] Aiming at the problem that traditional grid-connected inverters have poor robustness and cannot automatically participate in distribution network regulation, the present invention proposes a micro-grid micro-source power control strategy using virtual synchronous generator technology and a method for seamlessly switching between different operating modes of micro-grid . Through the virtual motor technology, the grid-connected inverter can automatically participate in the frequency / voltage adjustment of the distribution network, and has the ability to automatically participate in the adjustment of the distribution network.

[0084] The hardware topology that the present invention relies on is as figure 1 shown; the control strategy is as figure 2 shown. The present invention provides a micro-grid and micro-source control method based on a virtual sy...

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Abstract

The invention provides a microgrid and microsource control method based on a virtual synchronous electric generator. The method comprises the following steps of building a mechanical equation and an electromagnetic equation of the virtual synchronous electric generator, carrying out microsource active control through active adjustment of the virtual synchronous electric generator, carrying out microsource reactive control through reactive adjustment of the virtual synchronous electric generator and achieving seamless switching between different operating modes of a microgrid. The microgrid and microsource control method based on the virtual synchronous electric generator has the active and reactive adjustment capacity similar to that of the synchronous electric generator, can simulate the inertia and the damping characteristic of the synchronous electric generator, can overcome the impact on a power grid from inertialessness of a traditional grid-connected inverter, and can effectively improve the capacity of the power grid to accept the renewable energy sources.

Description

technical field [0001] The invention belongs to the field of electrical engineering, and in particular relates to a microgrid and microsource control method based on a virtual synchronous generator. Background technique [0002] As the global energy crisis and climate issues become increasingly prominent, distributed power generation technology and micro-grid technology that can simultaneously integrate multiple clean energy sources have received more and more attention [1-3]. However, distributed generation systems and micro-grids contain a large number of grid-connected inverters, which bring great challenges to the safe and stable operation of distribution networks and micro-grids [4-5]. In particular, conventional grid-connected inverters have fast response speed, almost no moment of inertia, and are difficult to participate in grid regulation. They cannot provide the necessary voltage and frequency support for active distribution The relatively poor microgrid provides ...

Claims

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Application Information

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IPC IPC(8): H02J3/40
CPCY02P80/14
Inventor 吕志鹏盛万兴刘海涛钟庆昌
Owner STATE GRID CORP OF CHINA
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