Power grid AGC multi-time scale coordinated optimization control method and system

Abstract

The invention discloses a power grid AGC multi-time scale coordinated optimization control method and system. The method comprises the steps: dividing all power stations into an energy storage power station group ES, a quick adjustment group K, a slow adjustment group M and a non-participated adjustment group N. The real-time adjustment and control requirements of power grid AGC are met through the energy storage power station group ES. The AGC adjustment power of the energy storage power station group ES is replaced through the quick adjustment group K, the AGC adjustment power of the quick adjustment group K is replaced through the slow adjustment group M, the difference of various power stations such as the energy storage power stations, the conventional water and thermal power stations and the new energy power stations in the AGC adjustment period is fully considered. Through coordination control under multiple time dimensions under the condition that the energy storage capacity is limited, the power grid AGC adjustment and control performance index is kept stable. Meanwhile, frequent AGC adjustment of a conventional water power station, a thermal power station and a new energy power station is reduced. The equipment loss and energy loss are reduced.

Description

technical field [0001] The invention relates to the field of power system dispatching, in particular to a power grid AGC multi-time scale coordinated optimization control method and system. Background technique [0002] With the development of energy storage technology, large-scale energy storage power stations are connected to the grid, and the energy storage capacity in the grid has been greatly increased. Energy storage power stations have the advantages of fast regulation and control of active power, less damage to equipment, and no need to abandon wind, water, and light. Energy storage power stations have gradually become the main members participating in the AGC control of the power grid. With the high proportion of renewable energy connected to the grid, the proportion of thermal power plants will gradually decrease and the proportion of new energy power plants will gradually increase. The role of energy storage power plants in grid AGC control will become increasingl...

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Problems solved by technology

In this way, the AGC regulation performance index of the power grid in the later stage will drop significantly compared with the previous period, and the AGC regulation speed may not be able to meet the needs of the power grid.

At present, there is no study on the AGC coordination and optimization method of energy storage and conventional and new energy power stations under multi-time dimensions according to the regulation cycle of energy storage power stations and conventional and new energy power stations.

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