Dynamic economic dispatching method for power system by considering optimal load transfer ratio and wind and light optimal grid-connected ratio

Abstract

The invention discloses a dynamic economic dispatching method for a power system by considering an optimal load transfer ratio and a wind and light optimal grid-connected ratio. The dynamic economic dispatching method comprises the steps of: collecting load data, drawing a load curve, delineating a load peak period, a flat period and a valley period, and calculating the average value of the totalload in the peak, flat and valley periods within the corresponding time period prior to the load transfer, determining the load transfer rate from the peak period to the valley period, the load transfer rate from the peak period to the flat period, and the load transfer rate from the flat period to the valley period, establishing a target function by considering the thermal power generation cost,the wind power purchase cost, the photovoltaic power purchase cost and the compensation cost of a user for load transfer, and performing solving by adopting an immune algorithm to obtain the wind power grid-connected ratio and the photovoltaic system when the system operating cost is the smallest, the load transfer rate from the peak period to the valley period, the load transfer rate from the peak period to the flat period and the load transfer rate from the flat period to the valley period, so that the consumption of renewable energy for wind power photovoltaics is promoted, and the economicbenefits can be improved.

Description

technical field [0001] The invention belongs to the technical field of electric power market operation, and in particular relates to a dynamic economic dispatching method of an electric power system considering the optimal transfer ratio of load and the optimal grid-connected ratio of wind and light. Background technique [0002] In recent years, my country's renewable energy installed capacity has continued to grow rapidly. As of the end of 2018, the national installed capacity of renewable energy power generation reached 729 million kilowatts, including 184 million kilowatts of wind power and 175 million kilowatts of photovoltaic power generation. However, the traditional power system dispatching only achieves the optimal allocation of resources by optimizing the dispatching of power sources on the power generation side, resulting in the severe problem of wind and solar curtailment. Therefore, power grid companies are actively exploring the coordinated operation of "sourc...

AI Technical Summary

Problems solved by technology

[0003] However, in the operation of the existing power system, the optimal allocation of resources is usually only realized by optimizing the scheduling of resources on the power generation side, and the resources on the demand side are not fully utilized, making the problem of wind and solar curtailment still very serious

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