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Off-network microgrid reliability assessment method based on timing simulation

A time series simulation and reliability technology, applied in the direction of AC network load balancing, single-network parallel feeding arrangement, data processing application, etc., can solve problems such as difficult micro-grid reliability evaluation

Inactive Publication Date: 2014-12-10
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Off-grid microgrids have characteristics such as randomness and timing. Traditional reliability assessment methods are difficult to accurately assess the reliability of microgrids in island mode. Reliability assessment algorithms based on island operation characteristics are urgently needed.

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  • Off-network microgrid reliability assessment method based on timing simulation
  • Off-network microgrid reliability assessment method based on timing simulation
  • Off-network microgrid reliability assessment method based on timing simulation

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Embodiment Construction

[0061] The specific embodiments and working principles of the present invention will be described in further detail below with reference to the accompanying drawings.

[0062] This embodiment adopts figure 1 The circuit structure of the off-grid microgrid shown in the figure shows that the internal power supply of the microgrid is mainly composed of wind turbines, diesel generators and energy storage systems. There are a total of 8 loads. Some branches are equipped with smart switches, which can be effective Cut off the load current, the cut-in, rated and cut-out wind speeds of the wind turbine are 3m / s, 8m / s and 15m / s respectively. Other relevant data are shown in Table 1 and Table 2.

[0063] Table 1 Microgrid internal power supply and energy storage system parameters

[0064]

[0065] Follow the steps below:

[0066] Step 1: Generate a set of random numbers δ according to the number n of components in the power grid 1 ,δ 2 ,···,δ n And follow T i =-lnδ i / λ i Calculate the trouble...

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Abstract

The invention discloses an off-network microgrid reliability assessment method based on timing simulation. The off-network microgrid reliability assessment method comprises the steps of firstly, on the basis of an ARMA model, calculating the timing power output of a wind power generation unit based on the output power characteristic curve of the wind power generation unit, secondly, building a timing charge / discharge model of an energy storage system and providing three operation strategies of the energy storage system, and finally, thoroughly assessing the reliability of an off-network microgrid based on the operation characteristics of distributed generation and the energy storage system. The method is used for performing reliability simulation assessment on the existing off-network microgrid, and is convenient in calculation and visual in result; as a result, the power supply reliability of the off-network microgrid can be effectively controlled.

Description

Technical field [0001] The invention relates to power system reliability evaluation technology, in particular to an off-grid micro-grid reliability evaluation method based on timing simulation. Background technique [0002] With the rapid development of society and economy, energy and environmental issues have received increasing attention. Conventional energy is not only limited in resources, but also causes serious environmental pollution, which is contrary to the scientific strategy of sustainable development, energy conservation and environmental protection. In order to reduce the impact on the environment and meet the growing energy demand, the microgrid based on new energy generation has also attracted the attention of power companies and users. The reliability of the microgrid and its impact on the power grid and users have become more important in recent years. One of the important research topics in the development and application of microgrids. In an off-grid microgri...

Claims

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Application Information

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IPC IPC(8): H02J3/46H02J3/28G06Q10/06G06Q50/06
Inventor 谢开贵胡博王杨王贺贺小辉黄映程
Owner CHONGQING UNIV