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In this paper the performance of a new hybrid islanding detection method is studied considering a synchronous generator based wind power system. The proposed hybrid islanding detection algorithm combines an adaptive reactive power perturbation based active method with a novel passive algorithm. The passive algorithm considered in this study relies on some special transient response characteristics...
The increasing penetration of wind power makes the power system more and more complicated, deregulated, and distributed. Thus, the time critical protection needs to be implemented in proper coordination. This requires real time monitoring and controlling of highly non linear modern electric grid, which can be achieved through Wide Area Measurement System (WAMS). Successful implementation of WAMS requires...
A single phase self excited induction generator (SEIG) can operate in two configurations; single winding and double winding. Their performance analyses have been presented quite extensively by the researchers. However, all of these address each configuration in isolation with no attempt being made thus far to present an integrated comparative performance assessment of the two models. This paper fills...
Flux switching machines (FSMs) with the advantages of single piece of rotor and robust rotor structure become a popular research topic in recent years that suitable for various speed conditions. This machine combined the advantages of Switched Reluctance Machines (SRMs) and Permanent Magnet Synchronous Machines (PMSMs). Previously, most of developed FSMs are mainly focused on inner-rotor configuration,...
This paper presents an integration of dual intelligent algorithms: artificial neural network (ANN) based fundamental component extraction algorithm and fuzzy logic based DC-link voltage self-charging algorithm (fuzzy self-charging algorithm), in a three-phase three-wire shunt active power filter (SAPF). The ANN and fuzzy logic are trained using the modified Widrow-Hoff (W-H) weight updating algorithm...
The hardware and software design of a low-cost photovoltaic (PV) monitoring system are presented. The system was designed on ATmega8535 microcontroller and applied for PV array characteristics. The PV array characteristics monitored are solar irradiance, temperature, short-circuit current, open-circuit voltage, maximum power, voltage and current at maximum power, fill factor and also efficiency of...
With the proliferation of power electronics devices used for industrial, commercial and residential purposes have led to the deterioration of supply current and voltage wave forms, and this caused power quality problems within the supply system. Traditional passive filter was the earliest solution for mitigating harmonics produced by non-linear loads, but passive filter have the disadvantages of series...
An increased interest in renewable energy such as wind, solar and etc. has reintroduced embedded generation to the power system network. However, traditional networks are designed for power to flow from the grid to the load. The integration of embedded generation into the system brought forth the issue of reverse power flow to system. A reverse flow of power would disrupt the operation of existing...
This paper presents the findings of a field pilot study to investigate the critical factors that affect retrofitted roof-mounted photovoltaic (PV) arrays in terms of their contributions to the operating cell temperature in Malaysian climate. The critical factors investigated in this study are the mounting roof materials, mounting heights, solar radiation levels and types of PV modules. As with all...
Proliferation of nonlinear loads /devices in power systems generates a major concern to power system engineers, courtesy of its severe contamination effects (polluting the distribution networks with current harmonics). This paper depicts artificial intelligence (AI) application on resolving the power quality problem mentioned above by using the parallel active power filter (APF) strategy in two-wire...
In remote area, the need for monitoring PV system is crucial to ensure stable PV power delivery. This paper describes the hardware and software design for PV monitoring system in remote area. The monitoring system is equipped with voltage sensor, current sensor, temperature sensor and irradiation sensor and GSM modem for data transmission. Real time clock chip is used for real time recording. The...
This paper presents a comparison between the performance of crystalline and thin-film type photovoltaic (PV) module technologies. The rooftop and ground mounted PV system installation conditions were considered in the study. The respective system performances were compared in terms of total energy generated, energy yield and Levelized Cost of Energy (LCOE). The PV system installation site's meteorological...
This paper focuses on applying Q learning techniques in a home energy management agent where the agent learns to find the optimal sequence of turning off appliances so that the appliances with higher priority will not be switched off during peak demand period or power consumption management. The policy based home energy management determines the optimal policy at every instant dynamically by learning...
This paper describes an approach aiming to automatically transform a model depicting a high level physical behavior into two different optimized building energy management application models. Basically, each application requires specific formalism and information therefore it is necessary to rewrite an initial physical behavior model to obtain application models. Up to now, these two application models...
The transfer matrix method is used to calculate the reflectance of a crystalline silicon on glass solar cell with a silicon nitride layer (SiNx) as antireflection coating (ARC). It is found that a SiNx double-layer ARC has little advantage over the single layer one. Among all SiNx double layer structures, the refractive index (and thickness) combination of 2.1 (35 nm) and 2.3 (40 nm) for the top and...
This paper presents the conceptual design and development of a Pneumatic Regenerative Braking System (PRBS) which specifically targets small to medium sized vehicles powered by petroleum fuels. The idea revolves around recovering energy that is normally lost during the braking process and putting it to better use, such as helping the vehicle accelerate. By lessening the burden of an Internal Combustion...
Multilevel inverters enables implementation of high-power-medium-voltage applications using smaller rated devices resulting to cheaper and compact design. Currently, researchers are interested in developing distributed generation (DG) with multilevel topology that produces not just active power demands, but also incorporated with custom power capabilities for power quality improvement. However, multilevel...
The fossil fuel resources, oil and Natural Gas (NG) have been playing a vital role in reshaping the socioeconomic status of many countries. The socioeconomic stability of the country is connected to sustainable fuel energy supply. The conventional fuel resources are valuable supply of finite natural energy. However, their increasingly supply and exploited production have shown great concern over fuel...
This paper presents a new multi-objective heuristic approach for reconfiguration of radial electrical distribution system based on a circular neighbor-chain-updating process. The proposed method (PM) attempts to exchange each tie switch of the initial configuration with its best neighborhood switch, which is regularly updated until there is no change in the objective function (OF). This process creates...
This paper describes the design of general data logger system which is able to store data from few input channels and having large memory space. The proposed data logging system is aimed to be able to store plenty quantities of data from analog signal over an extensive period of time so that it will be able to be left unattended for a quite long time. Besides the communication between microcontroller...
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