New energy-containing isolated microgrid life cycle economic evaluation method

Abstract

The invention discloses a new energy-containing isolated microgrid life cycle economic evaluation method. The method comprises steps: the initial investment cost CS for construction of the isolated microgrid is calculated; the investment loan amount Cloan, the loan term TL and the interest rate i are determined, and the repayment annuity CRPa is calculated; economic index data for each year in theisolated microgrid life cycle are calculated; net present values Cnpv and Prnpv corresponding to the total expenditure and the profits for operation of the isolated microgrid are calculated; and lifecycle economic evaluation indexes of the isolated microgrid are calculated, wherein the indexes comprise the system life cycle total profit net present value and the system unit capacity cost. Basedon a life cycle theory, the shortcomings that the evaluation result obtained by the traditional project financial evaluation method is short in time scale and large in limitations can be overcome, andthe economic characteristics in the system life cycle can be described comprehensively and accurately; and due to calculation on operation, maintenance and device replacement cost for the isolated microgrid, the influences on the whole economy by the operation condition of the system can be effectively reflected.

Description

technical field [0001] The invention belongs to the technical field of power system analysis and control, and in particular relates to a full-life-cycle economic evaluation method suitable for an isolated micro-grid containing new energy. Background technique [0002] As an important part of the development of Energy Internet, microgrid technology has gained more and more attention and attention. Microgrid plays an irreplaceable important role and has great development potential in the flexible and efficient application of distributed power and new energy, as well as intelligent control operations. Microgrid technology is an important research topic to solve the energy crisis and develop new energy. Microgrid is an autonomous system that can achieve self-control, management and protection. It can be connected to an external grid and run in parallel, or it can be disconnected from other grids and run in isolation. [0003] Isolated microgrids can be used to power remote are...

AI Technical Summary

Problems solved by technology

This method only pays attention to the staged goals and ignores the consideration of the overall goals of the system. The economic evaluation of the project does not fully consider the cost analysis of the entire life cycle of the equipment, resulting in large limitations and low accuracy of the analysis results, which cannot fully and effectively reflect the The actual economic state of the system

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