Multi-objective dispatching model-based microgrid energy control method under grid-connected operation mode

Abstract

The invention relates to a multi-objective dispatching model-based microgrid energy control method under the grid-connected operation mode. A microgrid comprises a plurality of microsources and a load. The method includes the following specific steps: (1) the information of each microsource and connecting lines in the microgrid is acquired by a processor, and with minimum power generation cost and environmental cost as objectives, a multi-objective economical dispatching model is created; (2) a membership function is created to fuzzify the multi-objective economical dispatching model, so that a non-linear single-objective microgrid economical dispatching model is obtained; (3) an improved genetic algorithm is adopted to optimize the non-linear single-objective microgrid economical dispatching model, so that the optimal active and reactive power data of each microsourcre and the connecting lines are obtained, and the data are transmitted to a microgrid power controller; (4) according to the received optimal active and reactive power data, the microgrid power controller controls the active and reactive power output of each microsoruce and the connecting lines. Compared with the prior art, the method has the advantages of high control precision and the like, and can guarantee the economical operation of the microgrid.

Description

technical field [0001] The invention relates to a power system economical operation and energy regulation technology, in particular to a micro-grid energy control method in a grid-connected operation mode based on a multi-objective scheduling model. Background technique [0002] With the gradual enhancement of people's awareness of energy saving and environmental protection, distributed power generation has been paid more and more attention to and used, and the research on microgrids composed of small-capacity distributed power sources is of particular concern. The microgrid combines various distributed power sources, loads, energy storage units, and control devices to form a single controllable unit that provides users with both electric energy and heat energy to achieve combined heat and power (CHP) . Microgrid has become an effective technical means to manage distributed energy in smart grid, and extensive research has been carried out on the operation control of microgr...

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Problems solved by technology

However, the grid structure used in these studies is relatively simple, and generally only considers the active power balance of the system, and seldom considers the influence of reactive power; The constraints are too simplified, and the indicators and constraints such as the exchange power of the micro-grid tie line, the rotating reserve, and the charging and discharging of energy storage components are rarely considered.

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