Large-scale wind power convergence area sending-out capacity determination method and large-scale wind power convergence area sending-out capacity determination equipment

Abstract

The invention provides a large-scale wind power convergence area sending-out capacity determination method and large-scale wind power convergence area sending-out capacity determination equipment. The method comprises confirming a wind power station subgroup at the tail end of a power system from a wind power station group in the wind power convergence area; respectively confirming corresponding equivalent impedance of each wind power station in the wind power station subgroup; choosing the wind power station with the maximum equivalent impedance as a reservation node; setting reactive compensation capacity of the wind power station and active power and reactive power corresponding to a wind turbine generator; establishing a power equation according to the reactive compensation capacity of the wind power station, the active power and the reactive power corresponding to the wind turbine generator and equivalent impedance corresponding to the reservation node; and confirming wind power convergence area sending-out capacity according to constant power factors of the wind turbine generator, active power after fault is removed and the power equation. Voltage change caused by active power change can be deduced based on an equivalent system by researching a network simplifying and system equivalent method when wind power is accessed into a wear-end power grid. The large-scale wind power convergence area sending-out capacity determination method can be used for quantitatively calculating sending-out capacity of a wind power convergence system.

Description

technical field [0001] The present invention relates to the technical field of new energy exploration, in particular to the operation and planning technology of large-scale wind power, specifically a method and equipment for determining the transmission capacity of large-scale wind power collection areas. Background technique [0002] The example of off-grid in wind power operation shows that large-scale wind power is connected to the weak-end power grid. When the system has a transient disturbance, a high-voltage process may occur, causing the wind turbine to go off-grid due to high-voltage protection action. [0003] When a short-circuit fault occurs in the system, it often causes a high-voltage process in the system. This is caused by the network structure of wind power collection areas and the power characteristics of wind turbines during low-voltage ride-through. When a short-circuit fault occurs in the system, the wind turbine enters the low-voltage ride-through state...

AI Technical Summary

Problems solved by technology

[0005] At present, the industry has gradually noticed the problem of high voltage when large-scale wind power is connected to the weak-end power grid, but there is no in-depth research on its mechanism and off-grid risk assessment methods

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