Generator combination method for interconnected grid with large-scale wind power taking into account risks

Abstract

The invention relates to a unit combination model of an interconnected power grid including large-scale wind power, specifically a model of a unit combination of a multi-region interconnected power grid taking into account various risk factors such as wind power, load uncertainty and system equipment failure. Based on the uncertainty of wind power and load, a set of typical equipment failure scenarios is selected, and the load loss expectation and wind curtailment caused by typical scenarios are introduced into the objective function in the form of penalties to quantify the impact of various risks on the power grid, and establish a system that takes into account the operation of the system. Risky Crew Combination Model. The invention takes into account operation uncertainties such as wind power output and equipment failure, and conducts risk assessment for the consequences caused by system uncertainties to establish an interconnected power grid unit combination model. The scheme determined by the invention can solve the day-ahead unit combination plan of the interconnected power grid within a limited calculation time, realize the coordinated optimization of system operation economy and reliability, and has a prospect of popularization and application.

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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