Complementary micro-grid economic operation evaluation method considering small hydropower stations

Abstract

The invention discloses a complementary micro-grid economic operation evaluation method considering small hydropower stations. The method comprises the following steps of: calculating an optimum proportion of each distributed power supply in a complementary micro-grid which is formed by combination of different distributed power supplies and energy storage capacity that needs to be configured for the distributed power supply on the basis of a primal-dual interior-point algorithm by taking energy storage capacity, a micro-grid equipment installation cost and system operation and maintenance cost as objective functions, and taking system capacity, a distributed power generation proportion and storage battery charge-discharge characteristics as constraint conditions; and establishing complementary micro-grid economic operation evaluation indexes, and carrying out comparison and analysis on a obtained complementary micro-grid, so as to form an optimum complementary micro-grid economic operation mode. A result shows that the micro-grid operation economic benefit is optimal when the contributions of three distributed power supplies including wind, light and water are complementary.

Description

technical field [0001] The invention relates to a method for evaluating the economic operation of a complementary micro-grid considering small hydropower, and belongs to the technical field of small hydropower operation. Background technique [0002] As renewable clean energy, wind, light, and water have the advantages of zero pollution, wide distribution, and large content, and occupy an increasingly important position in modern power systems. However, since photovoltaic and wind energy are easily affected by natural factors such as day and night changes, weather conditions, and wind strength, their output is intermittent and random. For small hydropower stations, most of them have small storage capacity or no storage capacity. In the short term, their output is basically unchanged, but from the perspective of seasonal time scale, there are wet seasons and dry seasons. However, my country's solar energy resources are abundant in summer and autumn, but scarce in spring and ...

AI Technical Summary

Problems solved by technology

However, since photovoltaic and wind energy are easily affected by natural factors such as day and night changes, weather conditions, and wind strength, their output is intermittent and random.

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