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An Online Energy Management Method of Building Microgrid Based on Improved Gray Prediction

An energy management and gray prediction technology, applied in the direction of load forecasting, AC network circuits, and renewable energy integration in AC networks. It can solve the problem of single optimization goal, no prediction data correction method, and no consideration of microgrid stability control. And other issues

Active Publication Date: 2019-12-24
WUHAN UNIV
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Problems solved by technology

[0004] There have been a lot of research on microgrid energy management systems at home and abroad, but no suitable forecast data correction method has been proposed, and the impact of forecast errors on energy management systems cannot be analyzed, and the optimization goal is relatively single, without considering the stability control of microgrids.

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  • An Online Energy Management Method of Building Microgrid Based on Improved Gray Prediction
  • An Online Energy Management Method of Building Microgrid Based on Improved Gray Prediction
  • An Online Energy Management Method of Building Microgrid Based on Improved Gray Prediction

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Embodiment Construction

[0088] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0089] This embodiment is realized by adopting the following technical solution, an online energy management method of building microgrid based on improved gray prediction, including the following steps:

[0090] Step 1. Establish a building micro-grid model, including establishing an energy storage device model, an electric vehicle model, an interaction model with the grid connection line, and a controllable load model; determine the constraints of each unit in the building micro-grid model;

[0091] Step 2. Establish an improved gray prediction model to predict real-time electricity prices, photovoltaic system power generation and uncontrollable load data;

[0092] Step 3. Using the building micro-grid model obtained in step 1 and the forecast data obtained in step 2, an online energy management system model is established, and the optimal power cons...

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Abstract

The invention relates to the technology of microgrid energy management, in particular to a building microgrid online energy management method based on improved grey prediction. For a building microgrid which contains an energy storage system, an electric vehicle and a controllable load and interacts with a superior interconnecting line, the grey prediction data are improved based on real-time electricity price, photovoltaic exerted force and family load, and online energy management is realized by taking building microgrid maximum profit and suppressed interconnecting line power fluctuation as targets. According to the method, a predicted value can be corrected in time by using known real-time data according to the changes in the aspects such as weather, environment and human factors, so that the prediction precision is improved, and online management for the building microgrid is realized. User electricity utilization cost optimization and multi-objective optimization of interconnecting line power suppression are comprehensively taken into account, so that the stability control of the building microgrid is improved.

Description

technical field [0001] The invention belongs to the technical field of micro-grid energy management, in particular to an online energy management method for building micro-grids based on improved gray prediction. Background technique [0002] In recent years, with the continuous development of renewable energy utilization technology, more and more distributed energy supply systems are integrated on the building side, forming a micro-grid system with buildings as the main body. There are generally multiple households in the building microgrid, which are mainly composed of distributed generation, energy storage units, electric vehicles and household loads. In order to realize the efficient and stable operation of the building micro-grid, it is necessary to adopt corresponding control strategies to coordinate and dispatch each unit. [0003] The microgrid is usually intelligently controlled and automatically dispatched by the energy management system. The micro-grid energy ma...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/38H02J3/28H02J3/24
CPCH02J3/003H02J3/24H02J3/28H02J3/383H02J2203/20Y02B10/10Y02E10/56
Inventor 杨军王馨刘源朱旭
Owner WUHAN UNIV
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