Load demand response-based grid-connected micro power grid reliability assessment method

Abstract

The invention discloses a load demand response-based grid-connected micro power grid reliability assessment method comprising the following steps: an annual output curve of a micro power source in a micro power grid is determined; time-of-use electricity prices are made in a micro power grid island, and a response electricity price model for micro power grid users is built; a load satisfaction index MLs of new energy of the micro power grid can be determined according to output of the micro power source of the micro power grid and load power; a load demand response model is built based on four constraining factors that are electricity quantities of loads, electricity prices, power and user satisfaction over consumption habit change; an object function is min(1-MLS), a variable is a variable quantity [delta]p of electricity price at each time segment, a particle swarm algorithm is used for solving the load demand response model, a corrected load curve is obtained, and corrected load curve-based grid-connected micro power grid reliability can be determined based on a combined output mode of a micro power grid rack structure, energy storage equipment and a distributed power source. The grid-connected micro power grid reliability assessment method can help overcome defects of a conventional micro power grid reliability assessment algorithm and is suitable for micro power grid reliability assessment under load demand response strategies.

Description

technical field [0001] The invention relates to a power system reliability evaluation method, in particular to a grid-connected micro-grid reliability evaluation method considering load demand response, and belongs to the technical field of electrical engineering. Background technique [0002] In the late 20th century, with the emergence of the energy crisis, people paid more and more attention to renewable energy. Distributed power generation in microgrid is an effective way for renewable energy to connect to the grid, but the intermittent and randomness of renewable energy output increases the difficulty of microgrid control. The dispatching method of the traditional power system only considers the impact of the power supply side on the system, but the demand response strategy based on user consumer psychology enables the grid manager to optimize the operation of the power system from the user side. The integration of renewable energy in microgrids and the implementation ...

AI Technical Summary

Problems solved by technology

However, the proposed reliability evaluation algorithm mostly studies the influence of microgrid grid structure and new energy on the reliability of microgrid, and there are few studies on the influence of new energy on microgrid's load satisfaction and load demand response on microgrid reliability.

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