Virtual inverter control device used for nano grid, and nano grid

A technology of virtual inverters and control devices, applied in the direction of circuit devices, single-network parallel feeding arrangements, electrical components, etc.

Pending Publication Date: 2019-07-09
SIEMENS AG
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Virtual inverter control device used for nano grid, and nano grid
  • Virtual inverter control device used for nano grid, and nano grid
  • Virtual inverter control device used for nano grid, and nano grid

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[0042] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.

[0043] figure 1 A unit grid 1 operating in an island state is schematically shown. Such a unit grid can be, for example, a single-family building in real life, which is equipped with a photovoltaic power generation device PV, an energy storage device BA (for example, a storage battery), and several electrical consumers or loads LD. Specifically, such as figure 1In the shown unit grid 1, there are n branch circuits connected in parallel (not fully shown in the figure). Therein, four of the branches 10 , 20 , 30 , 40 are shown as examples. A photovoltaic device PV is provided on the first branch 10, and a first inverter I11 (or photovoltaic inverter I11) connected to it can convert direct current into alternating current and out...

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Abstract

The invention provides a nano grid and a virtual inverter control device (VIC, 100, 200, 300) for the nano grid (1), wherein the nano grid (1) comprises at least one parallel branch (10, 20, 30, 40),wherein at least one branch of the branch (10, 20, 30, 40) is provided with a protection device (13, 23, 33, 43); the nano grid is characterized in that one of the protection devices is configured with one virtual inverter control device (VIC) ); the virtual inverter control device (VIC) comprises a sensor component (I210) capable of detecting at least one characteristic parameter on the branch, and a control component (230) capable of influencing the electric connection state of the protection device corresponding to the inverter control device (VIC) according to the characteristic parameters.

Description

technical field [0001] The invention relates to a virtual inverter control device for a unit grid and a unit grid provided with the control device. Background technique [0002] A micro-grid can include multiple unit grids (nano grids), where each unit grid is a small-scale distribution system composed of distributed power sources, energy storage devices, energy conversion devices, related loads, and monitoring and protection devices. electrical system. Among them, the nano grid generally refers to a grid network with a power level of less than 100kW and distributed energy. The unit grid usually works in a grid-connected mode that is connected to a conventional large power grid or a commercial power grid, or in an island mode that is disconnected from a large power grid. The unit grid usually includes a plurality of parallel branches, each of which is provided with a protection device, which usually includes a miniature circuit breaker (MCB). When the unit grid works in g...

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Application Information

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IPC IPC(8): H02J3/38
CPCH02J3/381H02J3/388H02J3/38H02J3/00H02J2203/20Y04S40/20Y02E60/00
Inventor 杜峰陈维刚刘臻卓越
Owner SIEMENS AG
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