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

A comprehensive benefit, microgrid technology, applied in the field of electric power, can solve the problems of single objective function establishment, incomplete comprehensive benefit evaluation, and insufficient overall benefit evaluation, achieve accurate weight coefficient results, reduce investment costs, and improve energy utilization efficiency. Effect

Inactive Publication Date: 2017-01-11
STATE GRID SICHUAN ECONOMIC RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 ...

Method used

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

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Embodiment 1

[0034] like figure 1 As shown, the microgrid optimal configuration method based on comprehensive benefit analysis disclosed in Embodiment 1 of the present invention includes the following steps:

[0035] Step 101: collect the operating environment data and load data of distributed power sources in the microgrid,

[0036] In a preferred embodiment, distributed power sources may include: renewable power sources (for example, wind turbine WT, photovoltaic array PV), non-renewable power sources (for example, micro gas turbine MT, diesel generator DG, etc.), and energy storage device BAT (for example, a storage battery);

[0037] Correspondingly, the operating environment data of the distributed power supply may include: natural environment data such as the current environmental wind speed and temperature, as well as fan cut-in wind speed, cut-out wind speed, rated wind speed, rated power, current battery power, charging power, self-discharge coefficient, charging power, etc. Dev...

Embodiment 2

[0053] Combination below figure 2 The grid-connected microgrid shown is a detailed description of the distributed power supply model in the optimal configuration method provided by Embodiment 2 of the present invention.

[0054] The grid-connected microgrid generally includes distributed power sources such as wind turbine WT, photovoltaic array PV, micro gas turbine MT, energy storage device BAT, and related auxiliary equipment such as controllers and inverters.

[0055] Each distributed power supply model can be defined as follows:

[0056] WT output model:

[0057] P W T ( V ) = 0 , 0 ≤ V ≤ V c i ...

Embodiment 3

[0078] The economic benefit index in the comprehensive benefit evaluation index in the optimal configuration method provided by Embodiment 3 of the present invention will be further described in detail below in combination with the foregoing embodiments.

[0079] Specifically, the economic benefit indicators may include: Equivalent annual value investment cost indicator C IV and economic return indicator C PR .

[0080] Equivalent annual investment cost index C IV

[0081] C IV It mainly includes equipment investment costs with equal annual value, and its calculation formula is:

[0082] C IV =C eq +C om +C sub +C fu (8)

[0083] In the formula, C eq It is an indicator of annual value expenses (including purchase expenses and installation expenses) such as the initial investment of equipment (for example, including various distributed power sources and auxiliary equipment, etc.); C om It is the annual operation and maintenance cost index of the equipment; C sub i...

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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 ...

Claims

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Application Information

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IPC IPC(8): G06Q10/04G06Q10/06G06Q50/06
CPCG06Q10/04G06Q10/06393G06Q50/06
Inventor 唐权周友富张玉鸿
Owner STATE GRID SICHUAN ECONOMIC RES INST
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