A Power Flow Transfer Entropy Based AC Fault Detection Method for the MTDC Wind Power Integration System
Shuai Cao, Xin Zhang, Wang Xiang, Jinyu Wen
Abstract
In this article, power flow transfer entropy (PFTE) is proposed as a criterion to evaluate the power flow transfer characteristics of the multiterminal HVdc (MTdc) wind power integration grid. This proposed criterion can detect and locate the ac three-phase to ground (TPG) faults in the MTdc grid by its sensitivity to power flow change to avoid communication. The transient energy dissipation control strategy is then designed according to the variety of PFTE, which reflects the power flow reversal characteristic of the MTdc grid during ac faults. Experimental results show that the system based on the proposed communication-free method can ride through ac TPG faults without blocking any converter.
Topics & Concepts
Control theory (sociology)Maximum power transfer theoremWind powerElectric power systemDissipationFault (geology)AC powerEngineeringGridComputer sciencePower (physics)Electronic engineeringElectrical engineeringVoltagePhysicsMathematicsGeometryQuantum mechanicsControl (management)Artificial intelligenceThermodynamicsGeologySeismologyHVDC Systems and Fault ProtectionHigh-Voltage Power Transmission SystemsPower System Optimization and Stability