A medium-low pressure distribution network risk management and control method with scenery firewood storage

A low-voltage distribution network, wind-solar storage technology, applied in data processing applications, system integration technology, instruments, etc., can solve the problem of low operating efficiency of autonomous micro-grids

Inactive Publication Date: 2019-03-12
HUZHOU ELECTRIC POWER SUPPLY CO OF STATE GRID ZHEJIANG ELECTRIC POWER CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly solves the problem of low operating efficiency of the autonomous micro-grid in the prior art, and

Method used

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  • A medium-low pressure distribution network risk management and control method with scenery firewood storage
  • A medium-low pressure distribution network risk management and control method with scenery firewood storage
  • A medium-low pressure distribution network risk management and control method with scenery firewood storage

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Experimental program
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Embodiment

[0091] In this embodiment, a method for risk management and control of medium and low voltage distribution networks that includes wind, solar and firewood storage, such as image 3 shown, including the following steps:

[0092] S1. Sampling at time interval △t to obtain status information of system power supply DG, important load CL, unimportant load NL, and energy storage device S at the current moment t;

[0093] S2. Determine whether the difference between the total power generation capacity and the important load demand exceeds the division trigger threshold value, if it is to re-divide the qualified microgrid, if not, only increase or decrease the unimportant load; the specific process includes:

[0094] Judging that under the structure system determined in the previous sampling period, in each autonomous microgrid (DG-CL) i Whether the change ratio of exceeds the set division threshold θ, that is,

[0095]

[0096] If so, enter step S3, if not, enter step S406 in st...

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Abstract

The invention relates to a medium-low pressure distribution network risk management and control method containing scenery firewood storage. As that power supply of the renewable power supply is volatile, randomness and intermittency, the power match between the power output and the electric load, The efficient use of distributed generation (DG) output power and the continuous and safe power supplyof critical loads (CL) become more complex and challenging, A 'stem and leaf generation strategy' is proposed to realize the optimal dispatching of power among multiple autonomous micro-grids, so asto realize the full utilization of DG power and the maximum power supply of important loads by means of energy storage equipment. This strategy constructs micro-grid topology matrix by generating matrix weights reasonably. An improved minimum spanning tree (MST) algorithm is used to determine the optimal DG-CL and S-CL power supply correspondence relation, obtains 'tree trunk'; The non-important load (NL) is selected by linear matrix inequality (LMI) algorithm and added to the trunk in the form of 'leaves' to form a new autonomous micromesh structure.

Description

technical field [0001] The invention relates to the field of distributed power generation and energy storage equipment of a micro-grid system, in particular to a method for risk management and control of a medium and low-voltage distribution network including wind, light, storage, and diesel power sources including wind and solar energy storage. Background technique [0002] With the maturity of the micro-grid system, this kind of power network system that can operate independently or grid-connected has adopted more renewable energy technologies. However, although there are relatively stable and reliable power supply systems such as internal combustion generators and gas turbine generators among the currently commonly used distributed power sources, their scale and power supply will be limited to a certain extent because they need to consume traditional energy for power supply. To meet the electricity requirements of all electricity loads in the micro-grid, and solar and win...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q50/06Y02E40/70Y04S10/50
Inventor 吴宇红纪涛周健赖旬阳李洋杨强薄耀龙郑军
Owner HUZHOU ELECTRIC POWER SUPPLY CO OF STATE GRID ZHEJIANG ELECTRIC POWER CO LTD
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