Peak clipping and valley filling optimization scheduling method for distributed energy storage power station during photovoltaic grid connection

Abstract

The invention discloses a peak clipping and valley filling optimization scheduling method for a distributed energy storage power station during photovoltaic grid connection. The optimization scheduling method comprises the following steps: 1, obtaining wind power plant group prediction information, distributed photovoltaic prediction information, load prediction information and distributed energystorage power station charge capacity information; 2, calculating a daily net load value, establishing a target function by taking the minimum daily net load variance as a target to optimize the charging and discharging power of the distributed energy storage power station, and forming a day-ahead charging and discharging plan of the distributed energy storage power station; and 3, based on the system economy and the wind power priority scheduling principle, bringing the day-ahead charging and discharging plan of the distributed energy storage power station into system power balance constraint, and establishing an objective function by taking the lowest system operation cost as a target to optimize the output of the wind power plant group and the output of the conventional unit so as to form output plans of the wind power plant group and the conventional unit. According to the invention, the net load peak-valley difference caused by distributed photovoltaic grid connection is reduced through the energy storage power station, and the power grid regulation capability is improved.

Description

technical field [0001] The present invention relates to the technical field of distributed energy storage power stations, in particular to the technical field of optimal dispatching of distributed energy storage power stations, in particular to an optimal dispatching method of distributed energy storage power stations for peak-shaving and valley-filling when photovoltaic grids are connected. Background technique [0002] At present, most of the existing research focuses on the use of energy storage to increase the acceptance space of wind power, and the research on the use of distributed energy storage power stations to solve the problems of frequent start-up and shutdown of conventional units and wind curtailment caused by regional large-scale distributed photovoltaic grid connection has not yet been carried out. Mature. For this reason, aiming at the system peak shaving problem caused by regional scale distributed photovoltaic grid connection has become one of the main con...

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Problems solved by technology

[0002] At present, most of the existing research focuses on the use of energy storage to increase the acceptance space of wind power, and the research on the use of distributed energy storage power stations to solve the problems of frequent start-up and shutdown of conventional units and wind curtailment caused by regional large-scale distributed photovoltaic grid connection has not yet been carried out. Mature

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