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Method for optimizing and configuring power supply of grid-connection-mode microgrid

A power optimization, micro-grid technology, applied in the direction of single-network parallel feeding arrangement, etc., can solve problems such as investment waste

Active Publication Date: 2013-06-12
WUHAN UNIV
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Problems solved by technology

[0005] If the power supply planning under the parallel mode of the microgrid is carried out with the traditional maximum load, it will bring waste of investment

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  • Method for optimizing and configuring power supply of grid-connection-mode microgrid
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  • Method for optimizing and configuring power supply of grid-connection-mode microgrid

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Embodiment

[0049] Below in conjunction with accompanying drawing, the technical scheme of the present invention is described in further detail:

[0050] When the microgrid operates in the grid-connected mode, because there is a large grid as an uninterruptible power supply for power supply, the reliability of power supply is no longer the primary consideration. Since the fluctuation of distributed power output affects the power flow in the microgrid, when considering the capacity configuration of the power supply, it is necessary to ensure that the network loss and voltage level in the microgrid are controlled within a reasonable range.

[0051] At the same time, when calculating the power investment cost of the grid-connected microgrid in the whole life cycle, it mainly takes into account the power supply construction cost in the initial stage of the power grid, the fuel cost during the operation of the power grid, and the operation and maintenance cost. The uninterruptible power supply o...

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Abstract

The invention relates to a method for optimizing and configuring a power supply of a grid-connection-mode microgrid, which belongs to the field of the optimization planning of an electric network. (when a power output constraint and quality constraint condition of a power supply in the microgrid is satisfied, the configuration capacity of each distributive power supply of each type is optimized and selected, the power construction expense, the operation expense and the damage of the microgrid under the grid-connection mode are adequately considered, a minimal total investment sum is adopted as a target function, a penalty function is introduced, the improved particle swarm optimization is used for solving the function, adaptability of a particle swarm is calculated by utilizing the penalty function when the constraint condition is not satisfied, and an optimal result is enabled to fall in the constraint range). For the operation characteristics of the grid-connection-mode microgrid, complementation of the inner power supply of the microgrid and the traditional power supply of a large grid as well as randomness of wind-optical resource and fluctuation of a load are considered, so that the economical performance of the power investment is optimal when the microgrid under the grid-connection mode satisfies the constraint condition.

Description

technical field [0001] The invention relates to a method for optimal configuration of a power supply, in particular to a method for optimal configuration of a power supply in a grid-connected microgrid. Background technique [0002] The use of renewable energy for power generation can minimize the dependence on traditional fossil energy and environmental pollution, but distributed power is usually "uncontrollable" and "unsuitable for control", and the existing power grid technology is still not fully suitable for distributed power generation. Access requirements. Thus, the concept of microgrid came into being. [0003] The grid-connected operation of the microgrid is the most common operation mode, and it is also the operation mode of the microgrid in most cases. It is different from isolated island operation. It not only needs to meet the reliability requirements, but also needs to meet the user's personalized power supply and power supply quality requirements. In this m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/46
Inventor 邓长虹何俊徐秋实黄文涛
Owner WUHAN UNIV
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