Energy storage peaking control method based on dual-time scale net load prediction

Abstract

The invention discloses an energy storage peaking control method based on dual-time scale net load prediction. The method comprises the following steps: 1, based on a day-ahead net load prediction result, the SOC sequence of the energy storage system and the post-peaking tie line power are obtained through objective function optimization, and energy storage energy flow optimization is completed; 2, the post-peaking tie line power obtained in the first step is expanded to a tie power interval; and 3, based on the intraday rolling prediction net load power with the accuracy higher than the day-ahead prediction accuracy and the SOC sequence obtained in the first step, the actual charge / discharge power of the energy storage system is corrected in the tie line power interval in the second stepto complete energy storage peaking control. Compared with day-ahead net load prediction, ultra-short-term rolling prediction provides a more accurate reference for setting of the charge and dischargepower for energy storage, the fast energy storage and flexible throughput capabilities are fully utilized, the post-peaking tie line power is smoother, and the peaking pressure is alleviated.

Description

technical field [0001] The invention relates to a prediction-based energy storage peak-shaving control method, in particular to an energy storage peak-shaving control method based on dual-time scale net load prediction. Background technique [0002] In recent years, the power peak-to-valley difference on the demand side has been increasing year by year. The large-scale grid-connection of wind power with intermittent, random and anti-peak-shaving characteristics has intensified the peak-shaving pressure of the system. Due to the lack of flexible peak-shaving resources, it is difficult for the traditional power grid to accommodate large areas. Grid-connected wind power resources lead to serious wind curtailment. In order to ensure the safe and reliable operation of the power grid while fully absorbing wind power resources, large-scale energy storage power stations that can achieve fast and flexible power throughput have been prepared to be used as peak-shaving resources in man...

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Problems solved by technology

[0002]In recent years, the demand-side power peak-to-valley difference has been expanding year by year, and the large-scale grid-connection of wind power with intermittent, random and anti-peak-shaving characteristics has aggravated the peak-shaving pressure of the system Due to the lack of flexible peak-shaving resources, the traditional power grid is difficult to absorb large-scale grid-connected wind power resources, resulting in serious wind curtailment

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