Active and reactive power coordinated control method to improve voltage security in new energy collection areas

Abstract

The invention relates to an active and reactive power coordination control method for improving new energy influx area voltage security, belonging to the operation and control technology field of new energy accessing to the electric power system. The active and reactive power coordination control method comprises steps of performing assessment on a new energy power fluctuation condition of a current power grid, if a voltage security issue exists, firstly starting reactive power voltage control with a reactive regulation amount being minimum as an object, fully utilizing a reactive regulation capability of a new energy power station to eliminate a problem of voltage out of limit of an energy influx area power grid, if the reactive power means is done, the voltage security issue still exists, starting an active scheduling control with the active power regulation amount being minimal as an object and using an active control means of the new energy power station to eliminate the problem of voltage out of limit. The active and reactive power coordination control method adapts to characteristics that the current new energy influx power grid is weak, voltage fluctuation is big, and voltage safety level is not high, and fully satisfies the reactive voltage automatic control need of the new energy influx area power grid in order to realize control requirements of various power grids for safety, quality and economy.

Description

technical field [0001] The invention belongs to the technical field of operation and control of a new energy access power system, and in particular relates to an active and reactive power coordination control method for improving the voltage safety of a new energy collection area. Background technique [0002] The characteristics of strong randomness, difficult forecasting, and anti-peak shaving of new energy sources such as wind and light make it more difficult to dispatch and control new energy gathering areas. Due to the lack of strong reactive power support in new energy gathering areas, the grid voltage fluctuates greatly with the active power of new energy sources, and the voltage safety margin of new energy grid-connected points is not large. How to tap the active and reactive power control capabilities of new energy power stations and suppress The impact of new energy active power fluctuations on grid voltage, supporting the grid voltage of new energy collection area...

AI Technical Summary

Problems solved by technology

The traditional AVC system only considers the reactive power and voltage regulation capability of the new energy power station itself. However, the power grid in the new energy collection area is weak, and the voltage fluctuation is greatly affected by the active power. At the same time, the reactive power regulation capability of the new energy power station is limited. The reactive power adjustment capability may not be able to ensure the voltage security of the power grid in the new energy collection area

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