Auxiliary analyzing method for day-ahead scheduling-plan optimization in mode of wind-fire coordinated scheduling

Abstract

The invention discloses an auxiliary analyzing method for day-ahead scheduling-plan optimization in the mode of wind-fire coordinated scheduling, and aims at minimizing the minimum electricity-generating cost of a system, and factors, such as a connecting-line plan, a spare plan, a unit depth-adjusting peak and the like are comprehensively considered under the circumstance that the wind abandonment of an electric network possibly occurs, so that the electric network is ensured to accept wind electricity as much as possible, the utilization ratio of intermittent-type energy sources is improved, and the economic benefit is improved. Meanwhile, the method has the characteristics of low calculating strength and strong adaptability and is more suitable for being popularized and applied to scheduling mechanisms with larger wind-electricity accessing power in China.

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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