Chain-off-network path identification method for new energy power station chains for new energy gathering areas

Abstract

The invention relates to a new energy collection region-oriented method for identifying a linked off-network path of new energy power stations, and belongs to the technical field of operation and control of access of new energy to a power system. The method comprises the steps of performing off-network scanning on the new energy power stations one by one by utilizing a power flow analysis tool according to a real-time running state of a current new energy collection region; performing cyclic post-off-network power flow simulation on off-network accidents possibly inducing off-network states of other new energy power stations until no new new energy power station is in the off-network state; and recording the corresponding off-network accidents and the linked off-network path. According to the method, the demands of rapid fluctuation of new energy and reactive voltage automatic control of new energy collection access at present are met and off-network early warning information is provided for implementing new energy automatic voltage control. The method can be integrated in a new energy automatic voltage control master station system running in a dispatching center; and a most suitable reactive voltage control policy is implemented to meet different safe, high-quality and economic power grid control demands.

Description

technical field [0001] The invention belongs to the technical field of operation and control of new energy access power systems, and in particular relates to a new energy power station chain off-network path identification method for new energy collection areas. Background technique [0002] The characteristics of strong randomness, difficulty in forecasting, and reverse peak regulation of new energy sources such as wind and light make it more difficult to dispatch and control the power grid. The development of new energy sources such as wind and photovoltaics in China has the characteristics of cluster development, access to weak power grids, and long-distance transmission. The voltage support capability of the new energy collection area is weak, and the problem of reactive power and voltage is prominent, which is easy to induce serious system safety and stability accidents. In recent years, the large-scale new energy unit chain off-grid accidents that have occurred freque...

AI Technical Summary

Problems solved by technology

The voltage constraints adopted by the traditional AVC system are given by the operator offline, which cannot guarantee that the new energy power station can still operate safely after other new energy power stations are chained off the grid.