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The critical fault clearing time is an indicator of transient stability margin and it changes with the generator load condition. If the protection devices are capable of operating before the critical clearing time (CCT) and also providing faster auto-reclosing as soon as the fault is cleared, then the system will not loose its synchronism and remain in stable operation. The goal of this paper is to...
In this paper a new method for preventing angle instability of synchronous distributed generations (DGs) in a micro-grid is presented. The angle stability of synchronous DGs due to special contingencies is investigated and the appropriate input power for synchronous DGs for preventing instability is computed. In order to computing the appropriate mechanical input power of DGs the trajectory sensitivity...
This paper from the point view of wind farm fault ride-through (FRT) capability, discusses the performance of converter protection schemes to it. Different resistor protection methods are summarized and then a new combined protection with crowbar (CB) and series dynamic resistor (SDR) is proposed. With the analysis of rotor current during fault, resistance values are calculated for practical application...
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