Optimizing method of independent microgrid system

Abstract

The invention discloses an optimizing method of an independent microgrid system which comprises diesel generators, a wind driven generator, a photovoltaic array and an energy storage battery. The optimizing method specifically comprises the steps of: considering a coordination control strategy among a combined starting mode of multiple diesel generators, the energy storage battery and the diesel generators on an optimizing plan designing model by an independent microgrid system-based multi-target optimizing design model to ensure that the utilization rate of renewable energy resources in the independent microgrid system is higher and the independent microgrid system is more economic and more environment-friendly in operation; aiming at the stability of the optimizing plant designing model of the system, considering the standby capacity of the stability demand of the independent microgrid system; and carrying out multi-target problem solving by adopting an NSGA-II (Nondominated Sorting Genetic Algorithm II)-based multi-target genetic algorithm on the basis of a solving algorithm of the optimizing plant design model so as to realize multi-target optimization of economy, reliability and environment friendliness of the independent microgrid system.

Description

technical field [0001] The present application relates to the technical field of an independent micro-grid system, and in particular relates to an optimization method of an independent micro-grid system. Background technique [0002] The independent micro-grid system refers to a small power system that is isolated from the large power grid and operates independently. It mainly supplies power to remote areas or islands, and makes full use of renewable energy for power generation, such as various types of distributed power generation such as photovoltaic arrays and wind power. The combination of units can effectively take advantage of the advantages of a single energy system, realize the complementarity of multiple energy sources, improve the efficiency and energy utilization of the entire independent micro-grid system, and have a lower cost than a single solar storage system or wind storage system and higher power supply reliability. [0003] To carry out the optimal plannin...

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Problems solved by technology

In the optimization planning, this method can simulate the renewable energy resources and load changes in the whole life cycle in detail, as well as the operation control strategy of the independent microgrid system, but it needs to take up a lot of simulation calculation time; in the optimization algorithm, since the optimization problem is A mixed optimization planning problem involving discrete variables and continuous variables is generally solved by artificial intelligence algorithms. When performing optimization planning, it is usually hoped that multiple index constraints can be satisfied at the same time, but in fact, in multi-objective optimization problems In the solution of the problem, different objectives often conflict with each other. In terms of optimal planning and design, the size of the single unit capacity of the configured diesel generator and the combined start-up mode of multi-machine equipment directly affect the technical and economic indicators of the entire system. The existing In the independent microgrid optimization design method, this problem is simplified. Usually, only the total power of the diesel generator set can be optimized, without considering the type of diesel generator and the multi-unit combination scheme. Among the optimization variables, Combinatorial optimization that does not consider both equipment type and equipment capacity

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