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Time-shift facility agriculture electric load scheduling method in micro energy grid

A facility agriculture, electric load technology, applied in AC network circuits, AC network load balancing, photovoltaic power generation, etc.

Pending Publication Date: 2019-06-28
LANZHOU UNIVERSITY OF TECHNOLOGY +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because most of the facilities and agricultural electricity loads in the micro-energy network can be time-shifted, that is, the working hours can be flexibly scheduled according to different situations to meet the needs of the situation, so the traditional optimal scheduling method is no longer applicable in the micro-energy network

Method used

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  • Time-shift facility agriculture electric load scheduling method in micro energy grid
  • Time-shift facility agriculture electric load scheduling method in micro energy grid
  • Time-shift facility agriculture electric load scheduling method in micro energy grid

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Embodiment Construction

[0022] Since photovoltaic power generation is greatly affected by the weather, its power generation is not stable enough. When the weather is sunny, the power generation is sufficient, so there is still a surplus of power consumed by photovoltaic power generation to meet the dispatch of time-shifted loads. In order not to cause energy waste, the excess power generation is charged to the battery; and when the weather is not sunny When the power generation is insufficient, the photovoltaic power generation cannot fully meet the dispatching consumption of the time-shiftable load, so the battery discharge is used to supplement the power; there is also a special case, that is, the energy consumption of photovoltaic power generation and electric load dispatching is exactly balanced. The steps are:

[0023] Step 1: According to the maximum similarity between the power consumption curve and the photovoltaic output curve of the micro-energy grid combined with the battery model, the lea...

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Abstract

The invention relates to a time-shift facility agriculture electric load scheduling method in the micro energy grid. An electric load optimized scheduling model of facility agriculture is establishedby the steps that 1) maximum likelihood is achieved according to a power utilization curve and a photovoltaic output curve of the micro energy grid together with a storage battery model, an objectiveis described in a least square method, and an objective function f of the optimized scheduling model is obtained; 2) proper prediction models, namely a photovoltaic power generation model and the storage battery model, are selected, a predicted value of sunshine irradiance is obtained according to the prediction models, the photovoltaic power generation power in the scheduling period is obtained,and a lead acid battery serves as an energy storage device; and 3) historical data of energy consumed by the time-shift electric loads in the micro energy grid is obtained, and the time-shaft electricload model in the micro energy grid is established. Especially, the model is solved in a chaotic optimization algorithm. Via the steps, the onsite consumption of the photovoltaic output can be maximized by combining the electric load optimized scheduling model of facility agriculture with the storage model.

Description

technical field [0001] The invention relates to the field of on-site consumption of smart grids and distributed power sources, and more specifically, to the dispatching technology of agricultural electric loads of time-shiftable facilities of micro-energy grids. Background technique [0002] With the rapid development of China's agriculture today, its level of science and technology is also constantly improving, so its demand for electricity and energy consumption is also growing steadily, and the corresponding load demand for facility agriculture is also more urgent. In particular, as a flexible, controllable, green, and economical new type of distributed power carrier, the micro-energy network has outstanding advantages in ensuring power supply for users, saving energy and environmental protection, and improving power quality. [0003] Photovoltaic greenhouses are a typical application of the combination of photovoltaic power generation technology and facility agriculture,...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J3/32
CPCY02E70/30Y02E10/56
Inventor 郝晓弘刘福潮芮晨裴婷婷张春燕顾群周治伊拜润卿李亚岚
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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