Transient Synchronization Stability Improvement Control Strategy for Grid-Connected VSC Under Symmetrical Grid Fault
Sen Huang, Jun Yao, Jinxin Pei, Shiyue Chen, Yi Luo, Zhaoyang Chen
Abstract
Under grid fault, the grid-connected voltage source converters (VSCs) have the risk of transient synchronization instability during low voltage ride through. Based on the equivalent rotor swing equation of VSC, this letter proposes an improved transient synchronization stability control strategy, which improves the existence of equilibrium points and transient synchronization behaviors of the VSC system. Thus, the transient synchronization stability of grid-connected VSC can be significantly enhanced. The simulation and experimental results demonstrate the validity of the proposed strategy.
Topics & Concepts
Control theory (sociology)Transient (computer programming)Synchronization (alternating current)GridVoltage sourceConvertersComputer scienceFault (geology)SwingEngineeringVoltageTopology (electrical circuits)MathematicsControl (management)Electrical engineeringArtificial intelligenceOperating systemSeismologyGeologyGeometryMechanical engineeringMicrogrid Control and OptimizationIslanding Detection in Power SystemsPower Systems and Renewable Energy