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This paper investigates the ability of impedance based fault locating systems in series compensated lines. Behaviour of Series capacitors and their built-in protection system has been studied to analyse the dynamics of the system during short circuit faults. This paper also aims at investigating attempt to provide a framework to facilitate a reliable decision making in the real time situation by amending...
Voltage Source Converter (VSC) based HVDC (VSC- HVDC) transmission technology as a kind of new dc transmission, is attracting more and more research. VSCs are susceptible to cable short-circuit fault and ground fault. This paper focuses on the transient characteristics of electrical quantities in a two terminal VSC-HVDC system after the occurrence of short-circuit fault and ground fault. Equivalent...
This paper presents a new definition of vulnerability area of voltage sags concentric relaxation vulnerability area (CRVA) that is the area of voltage sags caused by fault with the fault point as the center. Analyzing CRVA could greatly reduce the workload involved in traditional voltage sag vulnerability areas and provided us a judgment reference of the attribution of liabilities between power supply...
The flexible operation modes of microgrid result in an extreme challenge for the protection and control of microgrid. Therefore, this paper proposed a centralized protection and control scheme for microgrid. To identify the faulted region conveniently, the microgrid is divided into several zones in advance. Intelligent circuit breakers communicate with each other, then send real-time information by...
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