Micro-grid versatile flow modeling approach based on different types of energy

A modeling method and energy flow technology, applied in simulators, instruments, control/regulation systems, etc., can solve problems such as ignoring the relationship between correlation and coupling, and not being able to systematically describe the characteristics of energy flow

Active Publication Date: 2016-03-30
STATE GRID CORP OF CHINA +3
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  • Abstract
  • Description
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Problems solved by technology

In the existing methods, the thermal system and the power system are often separated, and they are controlled and managed separately through different quantitative factors, thus ignoring the interrel

Method used

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  • Micro-grid versatile flow modeling approach based on different types of energy
  • Micro-grid versatile flow modeling approach based on different types of energy
  • Micro-grid versatile flow modeling approach based on different types of energy

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Embodiment

[0095] In order to make the technical solution of the present invention more clear, take the cooling, heating and power triple supply subsystem in the microgrid as an example, combine Figure 8 And the specific implementation process will describe the present invention in detail.

[0096] 1. Construct an all-energy flow model for gas tri-generation. It mainly includes: energy elements, device elements and information elements.

[0097] Energy elements:

[0098] The chemical energy of natural gas E f =A f P f , the electrical energy E of the electric load p =A p P p , the thermal energy E of the cooling load c =A c P c , the heat energy E of the heat load h =A h P h .

[0099] Device class elements:

[0100] Micro gas turbine device description:

[0101] η f = E out E in = A ...

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Abstract

The invention relates to a micro-grid modeling approach, in particular to a micro-grid versatile flow modeling method based on different types of energy. The approach comprises the steps of (1) constructing a versatile flow model, including energy and energy flow analysis, energy conversion link analysis, energy distribution link analysis, energy storage link analysis, energy utilization link analysis and energy management link analysis; and (2) constructing a versatile flow network model. The approach systematically describes the energy characteristics of energy flow in the processes of generation, conversion, transmission, storage and utilization through a unified quantitative versatile flow digital model. Meanwhile, the theory can also be used flexibly for energy unified quantitative analysis of a single device through lumped constraints. In practical applications, the invention can freely and flexibly select each links in the energy network as required, takes factors under different situations and constraints into full consideration, systematically establishes a corresponding versatile flow model, and achieves unified quantitative analysis of different types of energy in a micro-grid.

Description

technical field [0001] The invention relates to a modeling method of a micro-grid, in particular to a modeling method of a micro-grid all-energy flow based on different energy types. Background technique [0002] With the deteriorating environment and the gradual reduction of non-renewable energy, renewable clean energy power generation technologies represented by wind energy and solar energy have developed rapidly. Small wind power generation, photovoltaic power generation, etc. are flexibly and decentralizedly connected to the user-side distribution network, which improves the reliability of local power supply, reduces transmission loss, primary energy utilization and reduces exhaust emissions. The wind and photovoltaic power generation systems connected to the distribution network in this way are collectively referred to as distributed power generation. Microgrid refers to an independent intelligent system integrated with distributed power generation, energy storage, loa...

Claims

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Application Information

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IPC IPC(8): G05B17/02
Inventor 李洋刘海涛吴鸣季宇于辉俞勤政
Owner STATE GRID CORP OF CHINA
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