VBR electromagnetic transient fast simulation model of synchronous machine based on time scale transformation

Abstract

In a large-scale power system, electromagnetic transient simulation is facing the contradiction between simulation speed and simulation accuracy, so the electromagnetic transient models of the components in the power system have been continually being improved. The synchronous generator is an important part of the power system, and the Voltage Behind Reactance (VBR) model of the synchronous machine is deduced and improved on the basis of the classical model. The method of Single-phase rotation transformation is based on the idea of a rotating coordinate system, and the frequency of the signal can be reduced by the rotation transformation. Moreover, the simulation step length of the electromagnetic transient is related to the frequency of the change of the electric quantity. The lower the change frequency is, the larger the simulation step can be. Here, according to the theory of single-phase rotation transformation, the VBR model of synchronous generator based on time scale transform is deduced, which can simulate in the case of large steps without the loss of the precision, and thereby which the speed of electromagnetic transient simulation of power system will be effectively improved.

Keywords

• synchronous generators
• synchronous machines
• power systems
• synchronous machine
• time scale transformation
• large-scale power system
• electromagnetic transient simulation
• electromagnetic transient models
• synchronous generator
• Reactance model
• single-phase rotation transformation
• rotating coordinate system
• simulation step length
• VBR model
• VBR electromagnetic transient fast simulation model
• voltage behind reactance
• electric quantity