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The uprising interest in multi-agent based networked system, and the numerous number of applications in the distributed control of the smart grid leads us to address the problem of time synchronization in the smart grid. Utility companies look for new packet based time synchronization solutions with Global Positioning System (GPS) level accuracies beyond traditional packet methods such as Network...
The use of animals, specially ovines, for controlling infesting species in crops is an ancient method that has several advantages with respect to the use of chemical and/or mechanical techniques. Shepherds required to supervise animals, are getting increasingly less available and are costly. Over the last years, technologies for automatic animal supervision have been investigated, typically including...
Time synchronization (TS) represents an important necessity for many industries in fields such as communications, manufacturing, and power systems related to electrical networks, microgrids, and renewable energies, among others, because it can ensure that cooperating processes or systems can interoperate correctly; further, the scheduling of specific tasks through a timestamp can be done. Among different...
Calamity failures in power grid due to malfunction of traditional backup protection system was one of the main causes of unwanted cataract trips. The new technique based on synchronized PMU with fast communication network and GPS system for time transfer have a dynamic adaptation for back-up protection of power system. The goal of the protection scheme is to estimate a new wide area backup protection...
Networks are currently essential for computing: It is therefore essential to guarantee the quality of network links in order to ensure a proper operation of computing systems. However, a widespread deployment of network monitoring devices might not be economically feasible. In this paper, we propose the use of Programmable System-on-Chip FPGAs (PSoCs) for enabling a comprehensive testing of networks...
This paper experimentally assesses the impact of loss of time-synchronization signal on synchrophasor-based Wide-Area Monitoring, Protection and Control applications. Phase Angle Monitoring (PAM), anti-islanding protection and power oscillation damping applications are investigated. Power system models are executed using a real-time simulator with commercial PMUs coupled to them as hardware-in-the-loop...
This paper introduces the control of a photovoltaic (PV) interface converter ready to offer auxiliary service - reactive power control - that also has Phasor Measurement Unit capability. A prototype of the controller is implemented using a National Instruments Compact RIO and tested using Hardware In the Loop techniques. Experimental results demonstrate the converter functionalities.
Real-time awareness of the phasor state, including the volatile frequency and phase angle, is critical to maintain reliable and stable operations of the power grid. However, the high cost and low accessibility of current synchrophasors restrict their large-scale deployment over highly distributed microgrids. In this paper, we present a practical system design for monitoring the microgrid frequency...
To control and preventing volcanic risk, are used different devices where many parameters are monitored that provide insight into the state of a volcano. This paper presents the design of system for monitoring the volcano seismicity. This system is composed of the module of acquisition data, the power module, the peripherals for communicate remotely and GPS to get time synchronization. This system...
Networks timing information's 24×7 wander monitoring solution, actual both for Telecom synchronization networks and for IEEE1588 based networks, including optimally controlled PLL desing is described in this article. It also mentions a cost effective SDH or SyncE signals' probe unit design, expanded MTIE/TDEV metrics, and some monitoring experience with non- trivial results concerning GPS related...
Highly distributed, autonomous and self-powered systems operating in harsh, outdoors environments face several threats in terms of dependability, timeliness and security, due to the challenging operating conditions determined by the environment. Despite such difficulties, there is an increasing demand to deploy these systems to support critical services, thus calling for severe timeliness, safety,...
EGNOS is the European SBAS currently providing GPS Safety of Life augmentation over Europe. In parallel with on-going EGNOS operations, GNSS constellations and signals are evolving (GLONASS, GPS, GALILEO, COMPASS, …). This evolving context has led ESA to launch the so-called “European GNSS Evolution Program” (EGEP) in order to explore more in depth the various evolution perspectives and evaluate possible...
This paper focuses on using a TI's DSP to design an AC electricity acquisition module, which can accomplish the function of distributed synchronous AC electrical parameters sampling. The hardware diagram of the design used a DSP and other auxiliary devices to set up an AC electricity acquisition module with the ability of high frequency distributed simultaneous electrical parameters sampling. Specifically,...
Abstract-The development of power system raises higher requirements for power system automation system and security infrastructure. Both the power system monitoring and control are developing toward wide-area measurement. Power System Sensor Network (PSSN) is proposed as a solution for power system security monitoring and control. The precision of time synchronization is one of the most critical factors...
A data processing software package is developed for passive seismic monitoring of hydraulic fracturing. The original seismic data is acquired by a surface array which has many stations work independently. The package converts original data files into SEG-Y format files, and files of all stations are synchronized and combined according to GPS time. Many methods are utilized to perform signal analyzing...
Sensing node network system (SNNS) is a compatible system in detection of landslide disaster. In this system, absolute time and location information acquire by GPS is deployed. Synchronization of absolute time by all node in the system, enable this system to communicate in dual communication by time control. Location information by GPS, enable the system to estimate network topology and enable the...
Wide Area Multilateration (WAM) systems are complex systems and suffer from several typse of interference that vary over time. To ensure reliable operation and high data quality, a continuous verification approach is needed. The typical quality metrics in Asterix Cat 20 data are not fully sufficient to determine the operational capability of a WAM system. Different parameters are needed additionally...
Due to the large amount of different new applications based on GNSS systems, the issue of interference monitoring is becoming an increasing concern in the satellite navigation community. Threats for GNSS can be classified as unintentional interference, jamming and spoofing. Among them, spoofing is more deceitful because the target receiver might not be able to detect the attack and consequently generate...
In order to protect pipeline transportation and prevent from manmade damages, it is very important to carry out such researches as prevention monitoring and accurate locating. Designed the system project of pipeline prevention monitoring, introduced its locating principle, the acoustic sensors and transducers are located at the end of each segment along the pipeline, as soon as damages appear in the...
In power quality monitoring, the thesis puts forward a method of power quality on-line monitoring system design based on GPS to improve the sampling accuracy of data in different spots. Meanwhile, the micro processor - TMS320LF2407A produced by TI company is chosen as the main control chip to meet the characteristics of the large quantity of data, and it introduces the hardware of working principle,...
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