Auxiliary analysis method for day-ahead dispatching plan optimization under wind-fire coordinated dispatching mode

Abstract

The invention discloses an auxiliary analysis method for optimizing the day-ahead dispatching plan under the wind-fire coordinated dispatching mode, aiming at the minimum power generation cost of the system, and comprehensively considering the connection line plan, the backup plan, and the deep adjustment of the unit in the case of possible wind curtailment in the power grid. Peak and other factors to ensure that the grid receives as much wind power as possible, improve the utilization rate of intermittent energy, and improve economic benefits. At the same time, this method has the characteristics of low computational intensity and strong adaptability, and is more suitable for popularization and application in dispatching agencies with large wind power access in my country.

Description

technical field [0001] The invention relates to an electric power system dispatching automation technology, in particular to an auxiliary analysis method for optimizing a day-ahead dispatching plan under a wind-fire coordinated dispatching mode. Background technique [0002] As one of the most mature new energy utilization methods, wind power has seen a substantial increase in installed capacity under the support of national policies. As of the end of 2011, the cumulative installed capacity of wind power exceeded 65 million kW, ranking first in the world, but the average utilization hours of wind power decreased by 144 hours from the previous year to only 1903 hours, far from reaching the expected goal. Wind power generation has the characteristics of uncertainty, volatility, and reverse peak regulation, and the existing short-term wind power prediction accuracy is not high, which brings challenges to system backup, peak regulation, and power balance. At the same time, the ...

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Problems solved by technology

[0003] With the construction of smart grid dispatching technical support system and the development of lean grid dispatching, Safety Constrained Unit Combination (SCUC) and Safety Constrained Economic Dispatch (SCED) have been applied in the production of dispatching plans. The SCUC method is completely adopted in the day-ahead plan, which is most beneficial to the consumption of wind power, but it has a great impact on the grid production plan, and there are great difficulties in actual production; while the SCED method Does not change the start-up and shutdown plan of the unit, which affects the consumption of wind power to a certain extent

[0004] Insufficient wind power acceptance capacity is mainly constrained by the weak grid structure and unreasonable power supply layout, which cannot meet the grid frequency voltage and power supply reliability requirements after the high-penetration new energy generation is connected.

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