Comprehensive benefit analysis-based micro-power-grid optimal configuration method

Abstract

The invention discloses a comprehensive benefit analysis-based micro-power-grid optimal configuration method comprising the following steps: operation environment data and load data of distributed power sources in a micro-power-grid are collected; according to a distributed power source model and a micro-power-grid operation solution, output data and comprehensive benefit evaluation indexes of the distributed power sources are obtained; according to the comprehensive benefit evaluation indexes and corresponding weighing coefficients, a comprehensive benefit object function with a distributed power source quantity as a variable is built; the comprehensive benefit object function is solved via a particle swarm optimization algorithm; the distributed power source quantity satisfying constraint conditions is obtained and used a configuration quantity of the distributed power sources in the micro-power-grid; via the method, an overall benefit and comprehensive benefit evaluating system of the micro-power-grid can be comprehensively built, effects exerted by all factors in micro-power-grid planning operation can be accurately analyzed, investment cost can be lowered, and energy utilization efficiency can be improved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a micro-grid optimization configuration method based on comprehensive benefit analysis. Background technique [0002] Energy is an important material basis for economic and social development, but as the world's most important energy, the "peak production" of oil has arrived, and conventional oil and gas resources are also facing depletion. The development and utilization of new energy and renewable energy is an inevitable trend of future energy development. Microgrid technology is the development trend of distributed energy supply microgrid in the future, and it is of great significance to promote energy conservation and emission reduction and realize sustainable energy development. The grid-connected microgrid can be connected to the distribution network for grid-connected operation. While meeting its own load requirements, it can also provide power support and backup ...

AI Technical Summary

Problems solved by technology

[0004] Many experts and scholars at home and abroad have conducted research on the planning and design of microgrids. Among them, some consider factors such as grid-connected converter capacity constraints and on-grid electricity prices, and set the minimum investment cost, operation and maintenance costs of microgrids as the operating goal. Optimal configuration of microgrid to solve (Wang Panbao, Wang Wei, Meng Nina, etc. Optimal configuration of DC microgrid based on comprehensive evaluation of operation mode and operation index[J]. Power Grid Technology, 2016(3): 741-748. ), but the evaluation of the comprehensive benefits of micro-grids is not comprehensive; Optimal allocation method for capacity improvement of wind-solar-storage micro-grid [J]. Electric Power Automation Equipment, 2016, 36(03): 26-32.), but did not consider fuel generators as distributed power sources; some use micro-grid configuration and running joint optimization (Hawkes A D, Leach M A. Modeling high level system design and unit commitment for a microgrid [J]. Applied Energy, 2009, 86(7-8): 1253-1265.), but only grid-connected The economy of the small microgrid is not comprehensive enough for the overall benefit evaluation

[0005] Moreover, most of the optimal allocation of distributed power sources in the existing microgrid considers its economic cost-effectiveness, and only considers the corresponding loss of pollutants and greenhouse gas emissions for environmental benefits, and only takes reliability as a constraint. The overall comprehensive benefit assessment of the power grid is not perfect and comprehensive

On the other hand, for the optimal configuration of the grid-connected microgrid, for example, the establishment of the objective function in the evaluation model of the optimal configuration of each distributed power source in the microgrid is relatively simple, and the comprehensive benefit evaluation after the microgrid is connected to the grid is not perfect.

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