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Situation awareness-based microgrid state estimation method

A state assessment and situational awareness technology, applied in the field of microgrid, can solve problems such as difficulty in dealing with disasters and emergencies, volatility and intermittency, and uncontrollable renewable energy equipment

Active Publication Date: 2018-08-17
ZHEJIANG UNIV
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Problems solved by technology

The large-scale consumption of renewable energy through the form of micro-grid can meet the user's requirements for power supply quality and reliability to a certain extent, but renewable energy is easily affected by natural conditions such as wind and solar resources, and its output is random. Volatility and intermittent, and renewable energy equipment is basically uncontrollable, it is difficult to deal with disasters and emergencies, which will inevitably bring huge hidden risks to the optimal dispatch of the microgrid system

Method used

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  • Situation awareness-based microgrid state estimation method

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Embodiment Construction

[0069] The present invention will be further described below in conjunction with embodiment.

[0070] A method for evaluating the state of a microgrid based on situational awareness, the specific process of which includes:

[0071] (1) Situation awareness, predicting the uncertainty model in the microgrid;

[0072] (2) Understand the situation and analyze the state of the microgrid system;

[0073] (3) Situation prediction, researching the future situation trajectory model of the optimal risk value of the microgrid;

[0074] Further, the step (1) includes:

[0075] Model construction of influencing factors-predicted values ​​for uncertain values ​​such as wind power generation, photovoltaic power generation, and load demand, combined with the randomness of influencing factors such as weather, to predict the uncertain values ​​with probability;

[0076] 1) Use the normal distribution curve to simulate the uncertainty of wind speed, and use the wind speed-fan output power fun...

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Abstract

The invention discloses a situation awareness-based microgrid state estimation method. The situation awareness-based microgrid state estimation method comprises the following steps of (1) situation awareness, in which an uncertainty model in a microgrid is forecasted, a model of an influence factor-forecast value is constructed for an uncertainty value, and the probability forecast is performed onan uncertainty value is performed by combining the randomness of the influence factor; (2) situation understanding, in which the state of a microgrid system is analyzed, a component fault of microgrid equipment is analyzed, and system topology analysis and power situation estimation are performed according to situation awareness data and a running state of the microgrid system; and (3) situationforecast, in which a future situation track model of optimal risk value of the microgrid is researched, the future situation track model of the optimal risk value of the situation awareness-based microgrid is built, and microgrid optimal risk calculation considering state estimation is performed by combining a microgrid safety constraint condition. By the situation awareness-based microgrid stateestimation method, the dynamic reliability estimation of the microgrid is achieved.

Description

technical field [0001] The invention relates to a state assessment method of a microgrid based on situational awareness analysis, and belongs to the field of microgrids, in particular to a method for assessing the state of a microgrid based on situational awareness. technical background [0002] With the large-scale development of renewable energy such as wind power and photovoltaic power generation, the microgrid system, as an effective technical means to realize the integrated operation of renewable energy and load, has become a focus of attention of researchers all over the world. The large-scale consumption of renewable energy through the form of micro-grid can meet the user's requirements for power supply quality and reliability to a certain extent, but renewable energy is easily affected by natural conditions such as wind and solar resources, and its output is random. Volatility and intermittency, and renewable energy equipment is basically uncontrollable, making it di...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/38
CPCH02J3/00H02J3/003H02J3/383H02J3/386H02J2203/20Y02E10/56Y02E10/76
Inventor 郭创新张章煌
Owner ZHEJIANG UNIV
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