Microgrid multi-time-scale energy management method capable of suppressing power fluctuation

Abstract

The invention provides a direct-current microgrid energy management method, in particular to a microgrid multi-time-scale energy management method capable of suppressing power fluctuation. With the multi-time-scale energy management method, power fluctuation in a grid is tracked and suppressed by combining a storage battery and super-capacitor hybrid energy storage system. With three time scales of the hour, minute, and second, day-ahead making of a hour-level dispatching plan, intra-day rolling correction of a minute-level dispatching plan, and real-time second-level in-grid power fluctuationtracking are realized. The storage battery is used for suppressing the low-frequency power fluctuation and the super capacitor is used for suppressing high-frequency power fluctuation. With consideration of coordination and cooperation between different scales, the in-grid power fluctuation is suppressed to the greatest extent by using the hybrid energy storage system, so that the economic and stable operation of the micro grid is improved substantially.

Description

technical field [0001] The invention belongs to the field of DC micro-grid energy management, and in particular relates to a micro-grid multi-time scale energy management method for stabilizing power fluctuations. Background technique [0002] With the continuous development of industry, human beings' demand for electric energy is increasing, and the power load of the power system is increasing. Under the current social background of increasingly depleted fossil energy and increasingly severe environmental problems, optimizing the energy structure and developing clean and renewable energy are the essential requirements for promoting the energy revolution and the urgent need for my country's economic and social transformation and development. Renewable energy power generation technology has the advantages of rich resources, less environmental pollution, and low fuel cost. The development and utilization of efficient, economical, flexible and reliable renewable energy power ge...

AI Technical Summary

Problems solved by technology

Most of the existing energy management methods only consider optimal scheduling on a single time scale, the scheduling period is long, and it is a static scheduling method; energy management methods considering multiple time scales lack coordination between different time scales, and different scales use The same economic operation target does not consider the power imbalance in the grid; due to the intermittent and load fluctuation characteristics of photovoltaics, the energy management method formulated only based on the prediction technology cannot avoid the possible power fluctuations in the grid, and generally The network is only equipped with a single battery energy storage device, and the response speed is relatively low, which cannot fully stabilize the fluctuations in the network

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