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Topology embedding enables one to execute a protocol designed for a specific (virtual) topology on another (real) topology by embedding the virtual topology on the real topology. In this paper, we propose a self-stabilizing emulation technique that provides reliable communication on a virtual topology in the presence of transient faults in real topology. The proposed protocol improves the execution slowdown of previous two protocols [19, 20] and provides adaptive message delivery delay on the emulated channels, which is a new type of adaptability against transient faults.
The amount of electrical energy produced by wind mills is constantly increasing. Nowadays detailed analyzes considering the impact of wind energy integration on the transmission system are required. The goal of this study is to investigate the dynamic response of a wind turbine with doubly fed induction generator connected to the power system during grid disturbance. The current and future wind power situation is modeled as two cases and a transient fault is simulated. In order to analyze the impact of wind energy integration in electrical power grid, a power system model has been developed, integrated with wind turbine using doubly fed induction generator and transient analysis are performed. Here, an attempt has been made to compare the impact, in terms of voltages, currents, total harmonic distortion, etc., of adding wind turbines into electrical power grid.
This paper proposes a DSP fault tolerant approach based on loop optimization known as DSP Loop Optimization Approach (DLOA). DLOA reduces the performance overhead incurred by traditional fault tolerance techniques while maintaining their fault tolerance capabilities. DLOA delays the fault tolerance latency between errors detecting and errors handling to scheduling the software pipeline, increasing performance significantly. The performance experiments and the ion irradiation experiments in the Heavy Ion Research Facility in Lanzhou (HIRFL) demonstrated that DLOA used in SWIFT achieved a 6.2 times average speedup and with its fault tolerance ability unaffected.
A phase-to-phase fault detection method is proposed in this paper to prevent breaker to close to a de-energized distribution line with fault. An inverter source connected to the low-side of service transformer is controlled by Thyristor Bridge to momentarily inject a transient high voltage to the de-energized feeders. Fault existence can be judged by detecting and analyzing the voltage waveform near the downstream side of the breaker. The method does not need communication and can be used for both adaptive reclosure and safely closing to a feeder de-energized for an extended period.