Integrated equivalent model structure of microgrid

A model structure, comprehensive equivalent technology, applied in the field of micro-grid, can solve the problem of the dynamic characteristics of the distribution network and other issues

Inactive Publication Date: 2014-02-12
SHANGHAI MUNICIPAL ELECTRIC POWER CO +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problem of the influence of a large number of distributed power sources and control inverter equipment connected to the medium and low voltage power grids on the dynamic characteristics of the distribution network

Method used

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  • Integrated equivalent model structure of microgrid
  • Integrated equivalent model structure of microgrid
  • Integrated equivalent model structure of microgrid

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0031] The comprehensive equivalent model structure of the present invention includes an equivalent static part and an equivalent motor part, the equivalent static part and the equivalent motor part are connected in parallel on the connected busbar, and the busbar is connected to the large power grid through a grid-connected switch , the equivalent static part includes static load elements, fuel cells, solar photovoltaic cells, and energy storage devices, and the equivalent electrical part includes an asynchronous generator, a synchronous generator, an asynchronous motor, and a synchronous motor.

[0032] The components in the microgrid can be divided into two categories, one is static components and the other is dynamic components. Static components include both static load components and distributed power sources such as fuel cells, solar photovoltaic cells...

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Abstract

The invention relates to an integrated equivalent model structure of a microgrid. The model structure comprises an equivalent static part and an equivalent motor part, wherein the equivalent static part and the equivalent motor part are connected on an accessed bus in parallel, and the bus is accessed to a large power grid through a grid-connected switch; the equivalent static part comprises a static load component, a fuel battery, a solar photovoltaic battery and energy storage equipment; and the equivalent motor part comprises an asynchronous generator, a synchronous generator, an asynchronous motor and a synchronous motor. The problem of influence to dynamic characteristics of a power distribution network when a large quantity of distributed power sources and control inverter equipment are accessed to medium and low voltage power grids is solved; and with the adoption of the integrated equivalent load model structure, analysis modeling are not required to be performed on all components in the grid during load modelling, so that the modelling method is simpler and more convenient, and the problem of influence to the dynamic characteristics of the power distribution network when a large quantity of distributed power sources and control inverter equipment are accessed to the medium and low voltage power grids can be solved.

Description

technical field [0001] The invention relates to the technical field of micro-grids, in particular to a comprehensive equivalent model structure of a micro-grid. Background technique [0002] In the near future, a large number of distributed power generation equipment will be connected to the medium and low-voltage power grid. Although it is simple and easy to manage distributed power generation sources individually, there are still many problems, such as high intervention costs, difficult control, and underutilization. The power generation capacity of the DG affects the power quality of the system, etc. Due to the uncontrollability of distributed power sources, once a fault occurs, restrictions and isolation measures are often taken to reduce the impact on the large power grid. In order to coordinate the contradiction between the large power grid and distributed power, and promote the comprehensive application of distributed power generation, especially renewable energy, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 方陈张宇时珊珊雷珽苏广宁
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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