New energy-containing isolated microgrid life cycle economic evaluation method

A full-life cycle, micro-grid technology, applied in resources, data processing applications, instruments, etc., can solve the problems of not being able to fully and effectively reflect the actual economic state of the system, low accuracy, and limited analysis results.

Inactive Publication Date: 2018-09-14
STATE GRID TIANJIN ELECTRIC POWER +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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...

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  • New energy-containing isolated microgrid life cycle economic evaluation method
  • New energy-containing isolated microgrid life cycle economic evaluation method
  • New energy-containing isolated microgrid life cycle economic evaluation method

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Embodiment Construction

[0080] The method for evaluating the life-cycle economics of an isolated microgrid containing new energy provided by the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0081] The invention first calculates the initial investment cost and loan amount of the microgrid system, and based on this, calculates the annual total expenditure and total income of the microgrid, and obtains the annual net income, tax payment and profit, and the time range covers the microgrid. the entire lifespan. Then, the calculation of the economic evaluation index is completed taking into account the time value of money, so that the economic characteristics of the isolated microgrid's entire life cycle are fully considered, and the economic evaluation results obtained are more accurate.

[0082] like figure 1 As shown, the life cycle economic assessment method applicable to the isolated microgrid containing new energy provi...

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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...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0637G06Q50/06
Inventor 刘忠义丁承第闫大威宋佳王魁李媛媛雷铮宣文博毛华刘树勇魏联滨李慧严博
Owner STATE GRID TIANJIN ELECTRIC POWER
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