Optimal Configuration And Economic Analysis Of Microgrid

Microgrid is distributed power supply is one of the important carriers, with its flexible mode of operation, energy cascade utilization, provide custom power supply features, can generate enormous economic and social benefits for the power company and user. But at the present stage, the distributed power cost is expensive, which limits the popularization and application of the microgrid. Therefore, it is very important to optimize the power supply capacity. Aiming at the shortage of the current research, the opportunity of constraint programming theory and the cost benefit analysis theory as a research tool, of micro grid power supply capacity of the optimized allocation model and method of research, and makes some research on micro economy. Specific work is as follows:For grid connected microgrid, a new method based on chance constrained programming is proposed, which is based on the average comprehensive cost of microgrid and the capacity allocation model of micro grid self power supply capability, The objective function and the constraint condition of uncertain factors in the model are expressed in the form of probability to satisfy certain confidence level, which makes the model more realistic. Based on stochastic simulation, the NSGA-? algorithm is used to solve the model, and the proposed scheme is proposed based on the utility theory.Secondly, a coordinated optimization control strategy is proposed to improve the economy of the whole life cycle of the system and to improve the economy of the whole life cycle of the system. Using chaotic free search algorithm for isolated micro grid simulation. From the simulation calculation results show that the proposed control strategy taking into account the various equipment operating constraints limit in the extended battery life has a bigger superiority, operation strategy can improve the full life cycle of the whole system of economic operation and environmental protection.Thirdly, considering the influence of the operation characteristics of the energy storage equipment on the cycle life of the system, the optimal allocation of micro grid energy storage capacity is studied. Based on the spectrum analysis of the net load power, the power allocation strategy is proposed to coordinate the operation of the battery and the super capacitor. Through the analysis of the reservoir to the cost structure of the equipment, established in hybrid energy storage to annual minimum cost as the objective function, taking into account the energy storage power charge and discharge, the remaining power constraints of the micro hybrid network storage can capacity optimization model.Finally, this paper presents a new method for the quantitative evaluation of the comprehensive economic benefits of micro networks. Compared to the traditional centralized power generation method is established considering micro network equipment investment and operation and maintenance cost and environmental benefit, network benefit of loss, delaying power grid construction efficiency, reliability, efficiency, energy efficiency of micro net income and cost calculation model. The method is applied to a typical example of a microgrid, and the comprehensive economic benefit of the microgrid is evaluated. By analyzing the factors that affect the economy of the microgrid, the measures to improve the economic performance of the microgrid are put forward.