Voltage-reactive power relevantly varied reactive power compensation demand acquisition method

Abstract

The present invention discloses a voltage-reactive power relevantly varied reactive power compensation demand acquisition method. The method comprises the following steps: step 1 based on the electrical parameter relation of a node in a system network structure, acquiring the relation of the node voltage change ratio of a load side, the active power and the change ratio thereof consumed in the load side, and the active power change ratio transmitted from a system side to the load side when the disturbance occurs, and acquiring a reactive power compensation demand rule at the node according tothe relation; and step 2 acquiring the load node voltage change ratio of the node to be analyzed, the reactive power change ratio consumed by the load, the reactive power change ratio transmitted fromthe system side to the load side under the time to be analyzed, and determining the reactive power demand of the node to be analyzed under the time to be analyzed based on the reactive power compensation demand rule of the step 1. The method can acquire the reactive power demand(s) of all the node(s) quickly and precisely.

Description

technical field [0001] The invention belongs to the technical field of reactive power compensation, and in particular relates to a method for obtaining reactive power compensation demand for voltage-reactive power correlation changes. Background technique [0002] The problem of voltage stability was first proposed by Professor Malkovich of the former Soviet Union, and put forward the critical condition of voltage instability. However, due to the small scale of the power grid at that time, simple load components, few system components and lack of new energy components and long-distance power flow, the problem of voltage stability was not very obvious at that time, and experts and scholars did not pay attention to the importance of voltage stability. . Affected by the demand for global energy flows, large-scale power grids have successively produced some power outages mainly caused by voltage instability, and researchers have gradually begun to pay attention to this research...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the problem that the determination result of reactive power compensation requirement in the prior art is not accurate enough to effectively guarantee voltage stability, and provides a method for determining reactive power compensation requirement of voltage-reactive power correlation change, which is deduced according to the relationship of electrical parameters The relationship between the reactive power consumed by the load side, the reactive power transmitted by the system, and the stable level is to study the relationship between the local reactive power compensation and the system input reactive power compensation, so as to obtain the demand for reactive power in this area, not only combined with The situation of local reactive power compensation is considered, and the situation of input reactive power on the system side is further considered, which is more comprehensive and conforms to the actual situation of the power system.

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