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Transient Stability Analysis of Grid-Following VSCs Considering Voltage-Dependent Current Injection During Fault Ride-Through by Xinshuo Wang; Heng Wu; Xiongfei Wang; Laurids Dall; Jun Bum Kwon is a Engineering article available to read on EtoBox.

What is Transient Stability Analysis of Grid-Following VSCs Considering Voltage-Dependent Current Injection During Fault Ride-Through about?

This article analyzes the transient stability of gridfollowing voltage source converters (GFL-VSCs) considering the voltage-dependent current injection (VDCI) dynamics during fault ride-through (FRT). The dynamic interaction between the VDCI and the phase-locked loop (PLL) under the weak grid is revealed to provide insight for their impact on system transient stability. The condition of existence of equilibrium points (EPs) of VSC-grid system during grid faults is first investigated by using a static model considering the VDCI. Then, a dynamic model is developed to characterize the capability of VSC in converging to the EPs during grid faults. It is revealed that the K-factor, which determines the characteristic of the VDCI, has a crucial impact on the transient stability of the system. Finally, case studies based on electromagnetic transient (EMT) simulation and experiment are given to validate the theoretical findings.

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Author

Xinshuo Wang; Heng Wu; Xiongfei Wang; Laurids Dall; Jun Bum Kwon

Publisher

Institute of Electrical and Electronics Engineers (IEEE)

Published

2022

Language

EN

Field

Engineering (Physical Sciences)