Independent micro-grid energy storage margin detection method

A detection method and micro-grid technology, applied in photovoltaic power generation, wind power generation, electrical components, etc., can solve problems such as less involving energy storage margins

Active Publication Date: 2016-05-11
SICHUAN UNIV
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Problems solved by technology

At present, the research on energy storage system mainly focuses on the control strategy and capacity optimization configuration. The common optimization models include: the hybrid energy storage capacity configuration method based on chance constrained programming aiming at the lowest device cost[2], and the method of stabi

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  • Independent micro-grid energy storage margin detection method
  • Independent micro-grid energy storage margin detection method
  • Independent micro-grid energy storage margin detection method

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Embodiment Construction

[0041] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The main idea of ​​the microgrid energy storage margin detection method based on reliability and stochastic characteristics is as follows: First, according to the random characteristics of wind, light or load, on the basis of day-ahead prediction, scene generation based on Latin hypercube sampling and probability-based The scene reduction technology based on distance, establishes a random model of wind power, photovoltaic output or load; secondly, establishes the reliability evaluation index based on the expected value of island power shortage and island power excess, and establishes a scenario-based generation and reduction technology, energy storage equipment charge and discharge optimization A microgrid energy storage margin detection model combining technology and chord method; finally, on the basis of considering the random characte...

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Abstract

The invention discloses an independent micro-grid energy storage margin detection method. Wind power, photovoltaic output and load random models are built on the basis of a latin hypercube sampling scene generation technology and a probability distance scene reduction technology; a scene generation and reduction technologies-based micro-grid energy storage margin detection model combining with a storage battery charge-discharge optimization technology and a secant method is built by constructing an expected value of island power shortage and the expected value of island power surplus as reliability evaluation indexes; on the basis of considering a micro-source and load stochastic characteristics, due to introduction of energy storage equipment and the ratio of newly increased load carrying capacity to an original load of a system, the micro-grid energy storage margin is detected or calculated to obtain the required minimum capacity of the energy storage equipment when a micro-grid reaches one energy storage margin under the condition of maintaining the reliability of the system unchanged.

Description

technical field [0001] The invention relates to the technical field of micro-grid energy storage, in particular to a method for detecting an independent micro-grid energy storage margin based on reliability and random characteristics. Background technique [0002] In recent years, with the increasingly prominent energy and environmental issues and the deepening of power market reforms, renewable energy power generation has developed rapidly around the world. Due to the fluctuation and random characteristics of intermittent energy sources such as wind and light, it has a great impact on the power balance, voltage and frequency stability of the microgrid. Moreover, the power prediction accuracy of intermittent energy sources such as wind and light is not high, which also increases the randomness of wind and light grid connection. Energy storage equipment, due to its flexible power regulation capability, has become an important device to balance the instantaneous power inside ...

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Application Information

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IPC IPC(8): H02J3/38H02J3/28H02J3/00
CPCH02J3/00H02J3/28H02J3/383H02J3/386H02J3/388H02J2203/20Y02E10/56Y02E10/76
Inventor 刘天琪胡晓通何川
Owner SICHUAN UNIV
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