نتایج جستجو برای: power quality monitoring
تعداد نتایج: 1464430 فیلتر نتایج به سال:
In recent years there is growing pressure on the medical sector to reduce costs while maintaining or even improving the quality of care. A potential solution to this problem is real time and/or remote patient monitoring by using mobile devices. To achieve this, medical sensors with wireless communication, computational and energy harvesting capabilities are networked on, or in, the human body f...
In this paper, a method based on continuous wavelet transform is suggested for calculation of flicker power. The flicker power can be utilized to identify the flicker direction to a flicker source with respect to a monitoring point. In our proposed method, using continuous Gaussian wavelet transform, pure flicker waveforms are extracted from the measured voltage and current signals. The flicker...
1. Abstract Near real-time continuous monitoring systems have been proposed as a promising approach for helping drinking water utilities detect and respond quickly to threats related to the normal operation of the water network. Water quality sensors may detect contamination events that pose a growing threat to public health, while pressure and flow sensors are used for estimating the hydraulic...
introduction: laser interstitial thermotherapy (litt) is an internal ablation therapy method consisting of a percutaneous or intraoperative insertion of laser fibers directly into the liver tumor with maximum diameter of 5 cm. in this treatment method, there isn’t any general information about the relationship between increasing the exposure power, coagulation and carboniza...
in this paper, a new method based on branch placement for the optimal positioning of phasor measurement units (pmus) in power systems is proposed. in this method, the pmus are in type of single-channel and are installed at the beginning of the branches. therefore, they are able to measure the bus voltages. also, the installation of the pmus on the branches increases the security of observabilit...
With the advent of deregulation, distributed generation will play an increasing role in electric distribution systems. Various new types of Distributed Generation (DG), such as micro-turbines and fuel cells, are now being developed in addition to the more traditional solar and wind power. A common belief among developers is that DR will improve power quality, and this potential for better quali...
AC railway traction loads are usually huge single phase loads. As a result, a significant amount of Negative Sequence Current (NSC) is injected into utility grid. Moreover, harmonics and consumption ofreactive power are further power quality problems that the supply network is encountering. In this paper, acompensation strategy with the aid of Railway Power Conditioner (RPC) is proposed to over...
This paper describes recent implementations and proposes new developments related to automated fault and disturbance analysis. An advanced expert system for automated analysis of faults and related operations of protective relays using DFR data is described first. Further improvements in the fault location using synchronized sampling are discussed next. Possibility for DFR modifications to allo...
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