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An energy local area network and control method considering the interaction of multiple microgrids

A local area network, multi-micro network technology, applied in the direction of AC network circuit, single network parallel feeding arrangement, single AC network with different frequencies, etc. Short distance and other problems, to achieve the effect of clear layers, overcoming power prediction, and enhancing voltage support capability

Active Publication Date: 2019-08-16
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the electrical distance between multi-infeed systems is short and the mutual influence is large, and the receiving end network needs to have a strong enough voltage support capability, which will greatly increase the cost and control level of energy Internet construction

Method used

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  • An energy local area network and control method considering the interaction of multiple microgrids
  • An energy local area network and control method considering the interaction of multiple microgrids
  • An energy local area network and control method considering the interaction of multiple microgrids

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Embodiment

[0035] In the following, the present invention will be further described from several aspects such as layered architecture, multi-microgrid interaction scheme and switching strategy, operation mode, and validity verification.

[0036] (1) Based on the DC energy local area network architecture based on multi-microgrid interaction and two-voltage level buses, the three-layer structure of the energy local area network is as follows: figure 1 shown. In this embodiment, the subnet is a microgrid.

[0037] In order to make the control of the energy switch simple, there is no need to consider issues such as frequency and phase synchronization, so as to facilitate the access of each subnet, the common bus on the low-voltage side adopts a DC form;

[0038] In order to simplify the structure of the energy router, reduce the conversion links of electric energy, and make the control simple, a DC energy router is proposed, which simplifies the three-level conversion into one-level convers...

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Abstract

The invention relates to an energy local area network considering multi-micro-grid interaction. The energy local area network comprises a medium-voltage direct current bus, an energy router, a low-voltage direct current bus, multiple energy switches and multiple micro grids, wherein controllable loads, distributed type electrical storage systems and distributed type power supplies in the respective micro grids are connected with the corresponding energy switches through plug and play interfaces; the energy router is positioned between the low-voltage direct current bus and the medium-voltage direct current bus; each energy switch feeds back the total voltage, frequency and operating states to the corresponding micro grids to the energy router; and the energy router transmits instructions to the respective energy switches according to the feedback results so as to switch operating modes of the corresponding micro grids. Compared with the prior art, information bottleneck and the problem in coordination of optimization control and automatic control in a communication process can be effectively solved through comprehensive measuring, overall configuration and layered integration; and optimal overall energy coordination can be achieved.

Description

technical field [0001] The invention relates to an energy local area network, in particular to an energy local area network and a control method considering the interaction of multiple microgrids. Background technique [0002] Improving the utilization rate and management level of renewable energy to the maximum is the core connotation of the Energy Internet. However, due to the geographical dispersion, intermittent, random and uncontrollable nature of renewable energy power generation, its high penetration rate access It is bound to have an impact on the power system and affect the safe and stable operation of the power system. As an effective organization form of local distributed generation (distributed generation, DG), distributed energy storage (EES), controllable load (controllable load, CL), microgrid (MG) has become an effective way to manage DER. There is the best autonomous system, which will become the smallest form of energy Internet terminal in the future. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/02
CPCH02J3/02H02J3/38H02J3/382H02J3/388
Inventor 米阳李战强何星瑭韩云昊符杨宋根新
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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