Interconnected grid unit combination method with large-scale wind power considering risk

Abstract

The invention relates to an interconnected grid unit combination model containing large-scale wind power, in particular to a multi-area interconnected grid unit combination model which takes into account various risk factors such as wind power, load uncertainty, system equipment failure and the like. Based on wind power and load uncertainty, typical equipment fault scenarios are selected, and theexpected loss of load and abandoned air volume caused by typical scenarios are introduced into the objective function in the form of penalty, the influence of various risks on the power grid is quantified, and the unit commitment model considering the system operation risk is established. The invention takes into account the operation uncertainties such as wind power output and equipment failure,and carries out risk assessment on the consequences caused by the system uncertainties to establish an interconnected power grid unit combination model. The scheme determined by the invention can solve the day-ahead unit commitment plan of the interconnected power network in a limited calculation time, realizes coordinated optimization of system operation economy and reliability, and has a popularization and application prospect.

Description

technical field [0001] The invention relates to a unit combination method in an electric power system, in particular to a unit combination method for an interconnected power grid that takes into account various risk factors such as wind power, load and uncertainty of power system equipment. Background technique [0002] In recent years, wind power has been favored by people for its low pollution and low cost, but its randomness and volatility will undoubtedly bring more uncertainty to the operation of the power system and increase the difficulty of day-ahead power generation planning. Most of the regions with rich wind power resources in my country are located in the central and western regions, far away from the east where the load is relatively high, and local consumption is difficult, resulting in a large number of abandoned wind phenomena. At the same time, in order to ensure the safe and reliable operation of the system, the system needs to reserve backups to prevent un...

AI Technical Summary

Problems solved by technology

However, with the increase in the number of wind farms, the large number of components in the interconnected grid, and the increasingly complex load fluctuations, the number of grid scenarios has increased rapidly in a geometric progression. Considering the impact of grid interconnection on system operation and scheduling and the impact of tie line failures on the reliability of interconnected grid operation Considering the impact of multi-scenario risks, the unit combination problem of wind power interconnected grid will face more challenges

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