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Microgrid energy management method and system thereof

An energy management system and energy management technology, applied in the field of microgrid energy management methods and systems, to achieve the effect of ensuring effective and safe operation, ensuring optimal control, and ensuring stable and effective operation

Active Publication Date: 2013-07-10
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Various types of energy storage units in the microgrid need to be charged and discharged. Unifying the charging and discharging controls of various types of energy storage units and making targeted adjustments flexibly is what is still lacking in the current microgrid energy management methods.

Method used

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  • Microgrid energy management method and system thereof
  • Microgrid energy management method and system thereof
  • Microgrid energy management method and system thereof

Examples

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Embodiment Construction

[0042] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0043] The microgrid structure that the present invention faces is such as figure 1 Shown. The microgrid contains a photovoltaic power generation unit, an iron-lithium battery energy storage unit, a liquid vanadium battery energy storage unit, a super capacitor energy storage unit, a group of critical loads and a group of secondary loads. The energy management system communicates with individual generation, energy storage and load units.

[0044] The structure of the energy management system is as follows figure 2 shown. It includes a supercapacitor energy storage management module, a grid-connected energy storage management module, an off-grid energy storage management module, and an off-grid power generation and load management module; the supercapacitor energy storage management module is connected to the grid-con...

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Abstract

The invention discloses a microgrid energy management method and a system thereof. The microgrid energy management system comprises a super-capacitor energy storage management module, a grid-connected energy storage management module, an off-grid energy storage management module and an off-grid power generation and load management module. An energy management module operates based on difference between generation power and load power in a microgrid, a super-capacitor energy storage management module enables a high-frequency part in power difference values in the microgrid to be contained in a power set value of a super capacitor to the maximum extent, the grid-connected energy storage management module sets powers of all stored energy in the microgrid according to a stored energy surplus capacity weighting allocation algorithm and a stored energy charging and discharging power set curve, the off-grid energy storage management module sets other stored energy except main stored energy according to the charging and discharging power curve, and the off-grid power generation and load management module controls power source and load in the micro grid according to a grid-connected management strategy or an off-grid management strategy.

Description

technical field [0001] The invention belongs to the field of new energy power generation, and in particular relates to a microgrid energy management method and a system thereof. Background technique [0002] The global energy crisis and environmental problems have promoted the rapid development of renewable energy power generation. While improving the energy structure, renewable energy generation also introduces some technical issues, among which research on grid access issues forms the research field of distributed generation (DG). The characteristics of flexible and decentralized DG locations are well adapted to the decentralized power demand and resource distribution, and delay the huge investment required for the upgrade of the transmission and distribution network. However, DG stand-alone access costs are high, the capacity is small, and the operation uncertainty is strong, which is somewhat restricted. Due to natural conditions, the lack of flexible and controllable f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H02J3/38
Inventor 赵上林吴福保丁杰周邺飞赫卫国刘海璇张新龙邱腾飞陈然张祥文汪春华光辉孔爱良杭晗梁硕
Owner CHINA ELECTRIC POWER RES INST
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