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Benchmarking and profiling virtual network functions (VNFs) generates input knowledge for resource management decisions taken by management and orchestration systems. Such VNFs are usually not executed in isolation but are often deployed as part of a service function chain (SFC) that connects single functions into complex structures. To manage such chains, isolated performance profiles of single functions...
In order to improve the safety of the operation of the hydrogen-cooled generator and ensure the stable operation parameters of the hydrogen as the cooling medium, this paper presents a low-cost and high-performance hydrogen quality monitoring system for the hydrogen-cooled generator with ARM microprocessor as the core. The system consists of a data terminal system and a cloud monitoring platform system...
In this paper, after a brief introduction on the proposed plug-and-play (PnP) process monitoring and control system, two online configuration approaches are proposed for the observer-based residual generator. Firstly, an adaptive residual generator is developed based on the adaptive observer scheme. Aiming at higher feasibility and reliability of industrial application, an iterative learning approach...
With the arrival of 5G communication era, a large number of core network equipments and transmission equipments with high power density and high performance are used in the node rooms. In the era of 5G, there's a groundswell in the requirement of safety, stability and reliability for node room. At present, the main short board of the node room is the capacity of the power supply and air conditioning...
In this paper the results of ten months monitoring of the microgrid supplied by the photovoltaic generator and operating in the Mediterranean area have been presented. The microgrid architecture and control strategy have been described. Further, the analysis of the energy exchange between the microgrid and the main grid have been analyzed. A particular attention has been given to the optimization...
As the penetration of small scale generators increases in distribution networks, the controllability of these systems, especially at Low Voltage (LV) level, is becoming more and more important. Several research studies proposed the adoption of the On-Load-Tap-Changer at the Secondary Substation transformer to enhance the voltage control, thus several commercial products are now available. This paper...
Vulnerability due to inter-connectivity of multiple networks has been observed in many complex networks. Previous works mainly focused on robust network design and on recovery strategies after sporadic or massive failures in the case of complete knowledge of failure location. We focus on cascading failures involving the power grid and its communication network with consequent imprecision in damage...
Wind power has become the most important component of renewable energy with advances in technology in recent years. Reducing operations and maintenance cost effectively and detecting the fault timely for wind turbines are critical to expand wind power use. Due to difficult access and harsh environment, offshore wind turbines have more urgent need for reducing operations and maintenance costs. This...
Monitoring of diesel generators is an important part of the management program of electricity utilities as well as telecommunication companies' in-order to have their cellular towers and base transmitter stations up all the time. A reliable remote monitoring method over the on-site method is always desirable so that managing of time and resources can take place as efficiently as possible. This paper...
The energy crisis and environmental concern lead to widely use of renewable energy sources in form of microgrid. The intermittent nature of the microgrid's sources and the altering behaviors of loads result to unstable of the system's voltage and frequency as well as the system reliability. The purpose of this paper is to develop real-time control based decentralizing technique for handling the challenging...
In this paper, we introduce the vibration acceleration signals combined with SCADA data to implement condition monitoring and fault diagnosis of the key components for wind turbines. Experimental data is from a wind turbine in six months with continuous SCADA data. Then three vibration models are established using the nonlinear state estimation technique (NSET) according to the SCADA data collected...
In this paper, after a brief introduction on the developed plug-and-play (PnP) process monitoring and control architecture, a decentralized plug-and-play (PnP) process monitoring system for large-scale industrial processes is studied. And then, aiming at lower online computational load and more flexible industrial implementation, a decentralized adaptive configuration technique is further developed...
The integration of Distributed Energy Resources (DER), μ-grids, Electric Vehicle (EV) charging, aggregated demand response and customer participation in the power market, has led to unprecedented dynamic behaviors and complication in the electric power system operations. With the introduction of Phasor Measurement Units (PMU), wide area monitoring and controls are feasible. In this paper, a stochastic...
Methods of development of formal mathematical models and control methods of channels of transmission information. It is shown that the main methods of controlling the state of transmission channels are reduced to the total, and the separate divisional methods.
The relationship between possible insulation damage in the field and their corresponding partial discharge (PD) signals was studied based on laboratory measurements for stator bars which have artificial insulation damage. PD signals were measured simultaneously with two kinds of microstrip-antenna devices and a capacitive coupling device. In this study, the dependency of PD magnitudes and phase resolved...
This paper presents a method for voltage stability monitoring based on the maximum power transfer to the load. The only required information is the system topology, the data from PMUs and the operational status of synchronous generators. With this information, the Thevenin impedance seen from a load bus can be estimated and by using the Thevenin theorem for maximum power transfer an impedance based...
With the introduction of more and more renewables into the power system both the inertia and the primary frequency reserves are expected to decrease. It is therefore a growing concern that the frequency quality will deteriorate. One way of mitigating these problems may be a more detailed monitoring of the generators providing the primary reserves. A promising approach for monitoring the generators...
It is essential to rapidly restore a power system after a blackout to minimize the economic losses and negative social impact. The most common approach of accelerating the restoration process is by restoring the complete network as several subsystems in parallel. Even though a parallel restoration process has obvious advantages over its sequential alternatives, sizes of the subsystems play key roles...
A 735MW Combined Cycle Gas Turbine (CCGT) site comprising of three generating units is used as a case study in this paper. The two gas turbines and one steam turbine site was commissioned in 1995. Each of the three generating units has a dedicated 290MVA 420/15kV GSU transformer, while two of the generating units are interfaced to a dedicated 12/21.5MVA, 15/3.3/3.3kV unit transformer.
This paper reports on the deployment of a continuous online partial discharge (OLPD) system to monitor a gas turbine generator at a combined cycle gas turbine (CCGT) power station. The site consists of two gas turbines rated at 250 MW and one steam turbine rated at 260 MW.
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