Method and device for determining voltage reactive sensitivity of automatic voltage control system

Abstract

The invention discloses a method and device for determining the voltage reactive sensitivity of an automatic voltage control system. The method includes the steps that a power grid is divided into a target area network, a buffering network and an external network, and the state information of the power grid at the current time is collected; according to the state information, equivalence is carried out on the external network through the external network equivalence method reserving the buffering network, and the external network obtained after equivalence, the target area network and the buffering network form a new power grid; the generator node type in the new power grid is adjusted; the voltage reactive sensitivity between PQ nodes in the target area network after the generator node type is adjusted is determined according to a voltage reactive sensitivity matrix between the PQ nodes. The target area network and a key boundary node are taken as analysis objects, and the formed equivalence network can largely reduce external network information, so that the accuracy of the voltage reactive sensitivity is high, time is saved, and efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of automatic voltage control systems, in particular to a method for determining voltage reactive power sensitivity of an automatic voltage control system and a device for determining voltage reactive power sensitivity of an automatic voltage control system. Background technique [0002] With the continuous construction of ultra-high voltage AC-DC transmission lines, the interconnection between regional power grids has been continuously strengthened, and my country's power grid has developed into a large-scale AC-DC interconnected power grid. The continuous increase of grid capacity, ultra-high voltage long-distance power transmission and large fluctuations in daily load all put forward higher requirements for the voltage and reactive power control of the grid. Therefore, constructing a suitable automatic voltage control (AVC, Automatic Voltage Control) system to realize a reasonable distribution of reactive ...

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Problems solved by technology

However, the voltage reactive power sensitivity results obtained by this method are quite different from the actual voltage changes of the relevant nodes before and after the reactive power compensation per unit capacity, and the accuracy is not high, which affects the control effect of the AVC system, etc.

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